CN206983710U - Hybrid vehicle and its dynamical system - Google Patents

Hybrid vehicle and its dynamical system Download PDF

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Publication number
CN206983710U
CN206983710U CN201720340392.5U CN201720340392U CN206983710U CN 206983710 U CN206983710 U CN 206983710U CN 201720340392 U CN201720340392 U CN 201720340392U CN 206983710 U CN206983710 U CN 206983710U
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power
motor
engine
electrokinetic cell
vehicle
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杨冬生
白云辉
王春生
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BYD Co Ltd
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BYD Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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Abstract

The utility model discloses a kind of hybrid vehicle and its dynamical system, the dynamical system includes：Engine, the engine output power to the wheel of the hybrid vehicle by clutch；Power motor, the power motor are used to output driving force to the wheel of the hybrid vehicle, wherein, the engine and the power motor drive the same wheel of the hybrid vehicle jointly；Electrokinetic cell, the electrokinetic cell are used to power to the power motor；DC DC converters；The auxiliary-motor being connected with the engine, the auxiliary-motor is connected with the power motor, the DC DC converters and electrokinetic cell respectively, when the auxiliary-motor is generated electricity under the drive of the engine to realize to the power battery charging, to power motor power supply, powered to the DC DC converters in it is at least one, so as to maintain vehicle low speed electric equilibrium and low speed ride comfort.

Description

Hybrid vehicle and its dynamical system
Technical field
It the utility model is related to technical field of vehicle, the dynamical system and one kind of more particularly to a kind of hybrid vehicle Hybrid vehicle with the system.
Background technology
With the continuous consumption of the energy, the development and utilization of new energy vehicle has been increasingly becoming a kind of trend.Hybrid power Automobile is driven as one kind in new energy vehicle by engine and/or motor.
But in the related art, the front motor of hybrid vehicle acts also as generating while motor is served as Machine, so when causing to run at a low speed front motor rotating speed it is relatively low, generated output and generating efficiency are also very low, so as to meet The power demand run at a low speed, vehicle maintain low speed electric equilibrium relatively difficult.
Utility model content
The utility model is intended to one of technical problem at least solving in correlation technique to a certain extent.Therefore, this reality It is to propose a kind of dynamical system of hybrid vehicle with first new purpose, vehicle low speed electric equilibrium can be achieved.
Second purpose of the present utility model is the dynamical system for proposing another hybrid vehicle.The utility model The 3rd purpose be the dynamical system for proposing another hybrid vehicle.4th purpose of the present utility model is to carry Go out a kind of hybrid vehicle.
To reach above-mentioned purpose, the utility model first aspect embodiment proposes a kind of dynamical system of hybrid vehicle System, including：Engine, the engine output power to the wheel of the hybrid vehicle by clutch；Power electric Machine, the power motor are used to output driving force to the wheel of the hybrid vehicle, wherein, the engine and described dynamic Force motor drives the same wheel of the hybrid vehicle jointly；Electrokinetic cell, the electrokinetic cell are used for the power Motor is powered；DC-DC converter；The auxiliary-motor being connected with the engine, the auxiliary-motor respectively with the power motor, institute State DC-DC converter with the electrokinetic cell to be connected, with reality when the auxiliary-motor is generated electricity under the drive of the engine Now to the power battery charging, to power motor power supply, at least one in DC-DC converter power supply.
The dynamical system of the hybrid vehicle proposed according to the utility model embodiment, engine will be dynamic by clutch Power is output to the wheel of hybrid vehicle, and power motor outputs driving force to the wheel of hybrid vehicle, engine and dynamic Force motor drives same wheel jointly, and electrokinetic cell is powered to power motor, and auxiliary-motor is generated electricity under the drive of engine When to realize to power battery charging, to power motor power supply, powered to DC-DC converter in it is at least one, so as to Vehicle low speed electric equilibrium and low speed ride comfort are maintained, lifts vehicle performance.
To reach above-mentioned purpose, the utility model second aspect embodiment proposes a kind of dynamical system of hybrid vehicle System, including：Engine, engine output power to the wheel of the hybrid vehicle by double clutch；First input Axle and the second input shaft, second input shaft are coaxially set on first input shaft, wherein, the engine is set Into one be selectively engageable by the double clutch in first input shaft and second input shaft, described Gear driving gear is provided with each input shaft in one input shaft and second input shaft；First output shaft and second defeated Shaft, first output shaft and second output shaft be arranged in parallel with first input shaft, first output shaft and Gear driven gear, the gear driven gear and the gear driving tooth are provided with each output shaft in second output shaft Wheel accordingly engages；Motor power axle, the motor power axle be arranged to in first output shaft and the second output shaft One linkage；Power motor, the power motor are arranged to link with the motor power axle, and the power motor is used to export Driving force to the hybrid vehicle wheel, wherein, the engine and the power motor drive the mixing jointly The same wheel of power vehicle；Electrokinetic cell, the electrokinetic cell are used to power to the power motor；DC-DC converter；With The connected auxiliary-motor of the engine, the auxiliary-motor respectively with the power motor, the DC-DC converter and electrokinetic cell It is connected, to realize to the power battery charging, to described when the auxiliary-motor is generated electricity under the drive of the engine Power motor is powered, at least one in DC-DC converter power supply.
The dynamical system of the hybrid vehicle proposed according to the utility model embodiment, engine will be dynamic by clutch Power is output to the wheel of hybrid vehicle, and power motor outputs driving force to the wheel of hybrid vehicle, engine and dynamic Force motor drives same wheel jointly, and electrokinetic cell is powered to power motor, and auxiliary-motor is generated electricity under the drive of engine When to realize to power battery charging, to power motor power supply, powered to DC-DC converter in it is at least one, so as to Vehicle low speed electric equilibrium and low speed ride comfort are maintained, lifts vehicle performance.
To reach above-mentioned purpose, the utility model third aspect embodiment proposes a kind of dynamical system of hybrid vehicle System, including：Engine, engine output power to the wheel of the hybrid vehicle by double clutch；First input Axle and the second input shaft, second input shaft are coaxially set on first input shaft, wherein, the engine is set Into one be selectively engageable by the double clutch in first input shaft and second input shaft, described Gear driving gear is provided with each input shaft in one input shaft and second input shaft；First output shaft and second defeated Shaft, first output shaft and second output shaft be arranged in parallel with first input shaft, first output shaft and Gear driven gear, the gear driven gear and the gear driving tooth are provided with each output shaft in second output shaft Wheel accordingly engages, an overhead in first output shaft and second output shaft set be provided with it is at least one reverse gear it is defeated Go out gear and be additionally provided with the reverse gear synchronizer for engaging the reverse output gear；Reverse gear shaft, the reverse gear shaft are arranged to Link with one in first input shaft and second input shaft and also join with least one reverse output gear It is dynamic；Motor power axle, the motor power axle overhead set are provided with motor power axle first gear and the tooth of motor power axle second Take turns, be additionally provided with the motor power axle positioned at the motor power axle first gear and the motor power axle second gear Between motor power axle synchronizer, wherein the motor power axle second gear is arranged to and one of gear driven gear Linkage, the motor power axle first gear are engaged with the main reducing gear driven gear of the hybrid vehicle to transmit driving Power to the hybrid vehicle wheel；Power motor, the power motor are arranged to link with the motor power axle, institute State power motor and be used for output driving power, wherein, the engine and the power motor drive the hybrid power vapour jointly The same wheel of car；Electrokinetic cell, the electrokinetic cell are used to power to the power motor；DC-DC converter；With the hair The connected auxiliary-motor of motivation, the auxiliary-motor are connected with the power motor, the DC-DC converter and electrokinetic cell respectively, To realize to the power battery charging, to the power electric when auxiliary-motor is generated electricity under the drive of the engine Machine is powered, at least one in DC-DC converter power supply.
The dynamical system of the hybrid vehicle proposed according to the utility model embodiment, engine will be dynamic by clutch Power is output to the wheel of hybrid vehicle, and power motor outputs driving force to the wheel of hybrid vehicle, engine and dynamic Force motor drives same wheel jointly, and electrokinetic cell is powered to power motor, and auxiliary-motor is generated electricity under the drive of engine When to realize to power battery charging, to power motor power supply, powered to DC-DC converter in it is at least one, so as to Vehicle low speed electric equilibrium and low speed ride comfort are maintained, lifts vehicle performance.
To reach above-mentioned purpose, the utility model fourth aspect embodiment proposes a kind of hybrid vehicle, including institute The dynamical system for the hybrid vehicle stated.
The hybrid vehicle proposed according to the utility model embodiment, is able to maintain that vehicle low speed electric equilibrium and low speed are put down It is pliable, lift vehicle performance.
Brief description of the drawings
Fig. 1 is the block diagram according to the dynamical system of the hybrid vehicle of the utility model embodiment；
Fig. 2 is the structural representation according to the dynamical system of the hybrid vehicle of the utility model one embodiment；
Fig. 3 is the block diagram according to the dynamical system of the hybrid vehicle of the utility model one embodiment；
Fig. 4 is the signal according to the drive mechanism between the engine of the utility model one embodiment and corresponding wheel Figure；
Fig. 5 is the signal according to the drive mechanism between the engine of the utility model another embodiment and corresponding wheel Figure；
Fig. 6 is the block diagram according to the dynamical system of the hybrid vehicle of the utility model another embodiment；
Fig. 7 is the curve synoptic diagram according to the Engine Universal Characteristics of the utility model one embodiment；
Fig. 8 is the structured flowchart according to the dynamical system of the hybrid vehicle of the utility model one embodiment；
Fig. 9 a are the structural representations of the dynamical system of the hybrid vehicle of the utility model one embodiment；
Fig. 9 b are the structural representations of the dynamical system of the hybrid vehicle of the utility model another embodiment；
Figure 10 is the structured flowchart according to the mu balanced circuit of the utility model one embodiment；
Figure 11 is the schematic diagram controlled according to the voltage stabilizing of the utility model one embodiment；
Figure 12 is the structured flowchart according to the dynamical system of the hybrid vehicle of one specific embodiment of the utility model；
Figure 13 is the block diagram according to the hybrid vehicle of the utility model embodiment；
Figure 14 is the flow chart according to the electricity-generating control method of the hybrid vehicle of the utility model one embodiment；
Figure 15 is the flow according to the electricity-generating control method of the hybrid vehicle of one specific embodiment of the utility model Figure
Figure 16 is the flow chart according to the electricity-generating control method of the hybrid vehicle of the utility model another embodiment；
Figure 17 is the stream according to the electricity-generating control method of the hybrid vehicle of the utility model another specific embodiment Cheng Tu；
Figure 18 is the flow chart according to the electricity-generating control method of the hybrid vehicle of the utility model another embodiment；
Figure 19 is the stream according to the electricity-generating control method of the hybrid vehicle of the utility model another specific embodiment Cheng Tu；
Figure 20 is the flow chart according to the electricity-generating control method of the hybrid vehicle of the utility model further embodiment；
Figure 21 is the stream according to the electricity-generating control method of the hybrid vehicle of the utility model another specific embodiment Cheng Tu；
Figure 22 is the flow chart according to the electricity-generating control method of the hybrid vehicle of the utility model further embodiment； And
Figure 23 is the stream according to the electricity-generating control method of the hybrid vehicle of the utility model another specific embodiment Cheng Tu.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model Limitation.
The dynamical system of the hybrid vehicle of the utility model one side embodiment proposition is described below with reference to Fig. 1-5 System, the dynamical system provide the power and electric energy of abundance for hybrid vehicle normally travel.
Fig. 1 is the block diagram according to the dynamical system of the hybrid vehicle of the utility model embodiment.Such as Fig. 1 institutes Show, the dynamical system of the hybrid vehicle includes：Engine 1, power motor 2, electrokinetic cell 3, DC-DC converter 4 and pair Motor 5.
With reference to shown in Fig. 1 to Fig. 3, engine 1 outputs power to the wheel 7 of hybrid vehicle by clutch 6；It is dynamic Force motor 2 is used for the wheel 7 for outputting driving force to hybrid vehicle.That is, the dynamical system of the utility model embodiment System can provide power by engine 1 and/or power motor 2 for hybrid vehicle normally travel.Of the present utility model one In a little embodiments, the power source of dynamical system can be engine 1 and power motor 2, that is to say, that engine 1 and power electric Any one in machine 2 can individually export power to wheel 7, or, engine 1 and power motor 2 can export power simultaneously to car Wheel 7.
Electrokinetic cell 3 is used to power to power motor 2；Auxiliary-motor 5 is connected with engine 1, for example, auxiliary-motor 5 can pass through The train end of engine 1 is connected with engine 1.Auxiliary-motor 5 respectively with power motor 2, DC-DC converter 4 and the phase of electrokinetic cell 3 Even, when auxiliary-motor 5 is generated electricity under the drive of engine 1 with realize charge to electrokinetic cell 3, powered to power motor 2, to It is at least one in the power supply of DC-DC converter 4.In other words, engine 1 can drive auxiliary-motor 5 to generate electricity, electric caused by auxiliary-motor 5 It is able to can provide at least one into electrokinetic cell 3, power motor 2 and DC-DC converter 4.It should be appreciated that engine 1 While power is exported to wheel 7 auxiliary-motor 5 can be driven to generate electricity, also individually auxiliary-motor 5 can driven to generate electricity.
Thus, power motor 2 and auxiliary-motor 5 correspond to serves as motor and generator respectively, auxiliary-motor 5 during due to low speed With higher generated output and generating efficiency, so as to meet the power demand run at a low speed, vehicle low speed can be maintained Electric equilibrium, vehicle low speed ride comfort is maintained, lift the power performance of vehicle.
In certain embodiments, auxiliary-motor 5 can be BSG (Belt-driven Starter Generator, belt transmission Startup/generating integrated motor) motor.It should be noted that auxiliary-motor 5 belongs to high-voltage motor, such as the generating electricity of auxiliary-motor 5 Pressure is suitable with the voltage of electrokinetic cell 3, so as to which electric energy caused by auxiliary-motor 5 can be without voltage transformation directly to electrokinetic cell 3 chargings, can also power directly to power motor 2 and/or DC-DC converter 4.And auxiliary-motor 5 falls within high efficiency generator, example Drive the generating of auxiliary-motor 5 that more than 97% generating efficiency can be achieved such as under the idling speed of engine 1.
In addition, in some embodiments of the utility model, auxiliary-motor 5 can be used for starting engine 1, i.e., auxiliary-motor 5 can With the function of realizing startup engine 1, such as when starting engine 1, auxiliary-motor 5 can drive the crank rotation of engine 1, So that the piston of engine 1 reaches ignition location, so as to realize the startup of engine 1, thus auxiliary-motor 5 can realize correlation technique The function of middle starter motor.
As described above, engine 1 and power motor 2 are used equally for driving the wheel 7 of hybrid vehicle.For example, such as Fig. 2 Shown, engine 1 and power motor 2 drive the same wheel of hybrid vehicle such as a pair of front-wheels 71 (including left front jointly Wheel and off-front wheel).In other words, when engine 1 and power motor 2 a pair of front-wheels 71 of driving jointly, the driving force of dynamical system Two type of drive driven can be used by exporting to a pair of front-wheels 71, vehicle.
Further, when engine 1 and power motor 2 drive same wheel jointly, with reference to shown in Fig. 2, hybrid power The dynamical system of automobile also includes main reducing gear 8 and speed changer 90, wherein, engine 1 by clutch 6, speed changer 90 and The first wheel such as a pair of front-wheels 71, the power motor 2 that main reducing gear 8 outputs power to hybrid vehicle pass through main deceleration Device 8 outputs driving force to the first wheel such as a pair of front-wheels 71 of hybrid vehicle.Wherein, clutch 6 can with speed changer 90 It is integrally disposed.
Further, in some embodiments of the utility model, as shown in Figure 1 to Figure 3, auxiliary-motor 5 also includes first Controller 51, power motor 2 also include second controller 21, and auxiliary-motor 5 is connected respectively to power electric by the first controller 51 Pond 3 and the DC-DC converter 4, and power motor 2 is connected to by the first controller 51 and second controller 21.
Specifically, the first controller 51 is connected with second controller 21, electrokinetic cell 3 and DC-DC converter 4 respectively, First controller 51 can have AC-DC converter units, and auxiliary-motor 5 can produce alternating current when generating electricity, and AC-DC converter units can be by height Medium-voltage Motor 2 generate electricity caused by convert alternating current be high voltage direct current such as 600V high voltage direct currents, with realization filled to electrokinetic cell 3 Electricity, power to power motor 2, powered to DC-DC converter 4 in it is at least one.
Similarly, second controller 21 can have a DC-AC converter units, and the first controller 51 can generate electricity auxiliary-motor 5 production Raw convert alternating current is high voltage direct current, and DC-AC converter units again can become the first controller 51 high voltage direct current to swap out Alternating current is transformed to, to be powered to power motor 2.
In other words, as shown in figure 3, when auxiliary-motor 5 is generated electricity, auxiliary-motor 5 can give power by the first controller 51 Battery 3 charges and/or powered to DC-DC converter 4.In addition, auxiliary-motor 5 can also pass through the first controller 51 and second controller 21 power to power motor 2.
Further, as shown in Figure 1 to Figure 3, DC-DC converter 4 is also connected with electrokinetic cell 3.DC-DC converter 4 is also It is connected by second controller 21 with power motor 2.
In certain embodiments, as shown in figure 3, the first controller 51 has the first DC terminal DC1, second controller 21 With the second DC terminal DC2, DC-DC converter 4 has the 3rd DC terminal DC3, and the 3rd DC terminal DC3 of DC-DC converter 4 can It is connected with the first DC terminal DC1 of the first controller 51, with the high pressure exported to the first controller 51 by the first DC terminal DC1 Direct current carries out DC-DC conversion.Also, the 3rd DC terminal DC3 of DC-DC converter 4 can also be connected with electrokinetic cell 3, and then First DC terminal DC1 of the first controller 51 can be connected with electrokinetic cell 3, so that the first controller 51 passes through the first DC terminal DC1 exports high voltage direct current to electrokinetic cell 3 to be charged to electrokinetic cell 3.Further, the 3rd direct current of DC-DC converter 4 End DC3 can also be connected with the second DC terminal DC2 of second controller 21, and then the first DC terminal DC1 of the first controller 51 can It is connected with the second DC terminal DC2 of second controller 21, so that the first controller 51 exports high straightening by the first DC terminal DC1 Electricity is flowed to second controller 21 to be powered to power motor 2.
Further, as shown in figure 3, DC-DC converter 4 also respectively with the first electric equipment 10 in hybrid vehicle It is connected with low tension battery 20 to be powered to the first electric equipment 10 and low tension battery 20, and low tension battery 20 is also with first Electric equipment 10 is connected.
In certain embodiments, as shown in figure 3, DC-DC converter 4 also has the 4th DC terminal DC4, DC-DC converter 4 The high voltage direct current that the high voltage direct current and/or auxiliary-motor 5 that electrokinetic cell 3 can be exported are exported by the first controller 51 is changed For low-voltage DC, and the low-voltage DC is exported by the 4th DC terminal DC4.Further, the 4th of DC-DC converters 4 DC terminal DC4 can be connected with the first electric equipment 10, to be powered to the first electric equipment 10, wherein, the first electric equipment 10 can For low voltage equipment, including but not limited to car light, radio etc..4th DC terminal DC4 of DC-DC converter 4 can also with it is low Battery 20 is pressed to be connected, to be charged to low tension battery 20.
Also, low tension battery 20 is connected with the first electric equipment 10, to be powered to the first electric equipment 10, especially, When auxiliary-motor 5 stops generating and the failure of electrokinetic cell 3 or not enough power supply, low tension battery 20 can be the first electric equipment 10 Power supply, so as to ensure the low pressure electricity consumption of vehicle, it is ensured that vehicle can realize pure fuel oil pattern traveling, improve vehicle distance travelled.
As above, the 3rd DC terminal DC3 of DC-DC converter 4 is connected with the first controller 51, and the 4th of DC-DC converter 4 the DC terminal DC4 is connected with the first electric equipment 10 and low tension battery 20 respectively, when power motor 2, second controller 21 and moves When power battery 3 breaks down, auxiliary-motor 5 can be generated electricity with by the first controller 51 and DC-DC converter 4 to the first electrical equipment Equipment 10 is powered and/or charged to low tension battery 20, so that hybrid vehicle is travelled with pure fuel oil pattern.
In other words, when power motor 2, second controller 21 and electrokinetic cell 3 break down, the first controller 51 can incite somebody to action Auxiliary-motor 5 generate electricity caused by convert alternating current be high voltage direct current, what DC-DC converter 4 can swap out the change of the first controller 50 High voltage direct current is transformed to low-voltage DC, to power to the first electric equipment 10 and/or be charged to low tension battery 20.
Thus, auxiliary-motor 5 and DC-DC converter 4 have independent supplying channels all the way, when power motor 2, second controller 21 and electrokinetic cell 3 when breaking down, motorized motions can not be realized, now pass through the independent of auxiliary-motor 5 and DC-DC converter 4 Supplying channels, it is ensured that the low pressure electricity consumption of vehicle, it is ensured that vehicle can realize pure fuel oil pattern traveling, improve in vehicle traveling Journey.
Further combined with Fig. 3 embodiment, the first controller 51, second controller 21 and electrokinetic cell 3 are also respectively with mixing The second electric equipment 30 closed in power vehicle is connected.
In certain embodiments, as shown in figure 3, the first DC terminal DC1 of the first controller 51 can be with the second electric equipment 30 are connected, and when auxiliary-motor 5 is generated electricity, auxiliary-motor 5 can be supplied by the first controller 51 directly to the second electric equipment 30 Electricity.In other words, the AC-DC converter units of the first controller 51 auxiliary-motor 5 can also be generated electricity caused by convert alternating current be high pressure Direct current, and powered directly to the second electric equipment 30.
Similarly, electrokinetic cell 3 can also be connected with the second electric equipment 30, to be powered to the second electric equipment 30.Say, The high voltage direct current that electrokinetic cell 3 exports can directly feed the second electric equipment 30.
Wherein, the second electric equipment 30 can be high-voltage electrical equipment, it may include but it is not limited to compressor of air conditioner, PTC (Positive Temperature Coefficient, positive temperature coefficient) heater etc..
As above, generated electricity by auxiliary-motor 5, can be achieved to charge for electrokinetic cell 3 or be that power motor 2 is powered or is first The electric equipment 30 of electric equipment 10 and second is powered.Also, electrokinetic cell 3 can be that power motor 2 supplies by second controller 21 Electricity, or powered for the second electric equipment 30, also can be the first electric equipment 10 and/or low pressure electric power storage by DC-DC converter 4 Pond 20 powers.Thus vehicle power supply mode is enriched, meets power demand of the vehicle under different operating modes, improves the property of vehicle Energy.
It should be noted that in the utility model embodiment, low pressure can refer to 12V (volt) or 24V voltage, and high pressure can refer to 600V voltage, but not limited to this.
Thus, in the dynamical system of the hybrid vehicle of the utility model embodiment, engine can be made in low speed It is not involved in driving, so without using clutch, reduction clutch abrasion or sliding wear, while reduce pause and transition in rhythm or melody sense, improve comfortable Property, and in low speed engine can be made to be operated in economic zone, only generating electricity does not drive, and reduces oil consumption, reduces engine and makes an uproar Sound, vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.Moreover, auxiliary-motor can directly be electrokinetic cell Charging, while be alternatively low-voltage device and powered such as low tension battery, the first electric equipment, it can also be used as starter motor.
A specific embodiment of the dynamical system of hybrid vehicle is described in detail with reference to Fig. 4, the embodiment is fitted Drive the dynamical system of same wheel, i.e. two driving mixed power automobiles jointly for engine 1 and power motor 2.Need to illustrate , the embodiment mainly describes a kind of specific drive mechanism between engine 1, power motor 2 and wheel 7, particularly Fig. 2 The structure of middle speed changer 90, the embodiment of remainder and Fig. 1 and Fig. 3 is essentially identical, is no longer described in detail here.
It should also be noted that, multiple input shafts, multiple output shafts and motor power axle 931 in example below and each Associated gear and shifting element etc. can be used to the speed changer 90 in pie graph 2 on axle.
In certain embodiments, shown as shown in Figure 1, Figure 3 and Figure 4, the dynamical system of hybrid vehicle mainly includes starting Machine 1, power motor 2, electrokinetic cell 3, DC-DC converter 4, auxiliary-motor 5, multiple input shafts (for example, the first input shaft 911, Second input shaft 912), multiple output shafts (for example, the first output shaft 921, second output shaft 922) and motor power axle 931 and Associated gear and shifting element (e.g., synchronizer) on each axle.
As shown in figure 4, engine 1 outputs power to mixing by the double clutch 2d in clutch 6 such as Fig. 4 examples The wheel 7 of power vehicle.When entering action edge transmission between engine 1 and input shaft, engine 1 is arranged to pass through double clutch 2d is selectively engageable at least one in multiple input shafts.In other words, when engine 1 transmits power to input shaft, hair Motivation 1 can be engaged optionally to transmit power with one in multiple input shafts, or engine 1 can also be optionally Simultaneously engaged with two or more input shafts in multiple input shafts to transmit power.
For example, in the example of fig. 4, multiple input shafts can include the first input shaft 911 and the second input shaft 912 two Input shaft, the second input shaft 912 can be coaxially set on the first input shaft 911, and engine 1 can pass through double clutch 2d Optionally engaged with one in the first input shaft 911 and the second input shaft 912 to transmit power.Or especially, start Machine 1 can also be simultaneously engaged with to transmit power with the first input shaft 911 and the second input shaft 912.However, it is to be understood that hair Motivation 1 can also disconnect with the first input shaft 911 and the second input shaft 912 simultaneously.
Multiple output shafts can include 922 two output shafts of the first output shaft 921 and the second output shaft, the first output shaft 921 and second output shaft 922 be arranged in parallel with the first input shaft 911.
It can be driven between input shaft and output shaft by shift gear pair.For example, it is respectively provided with each input shaft There is gear driving gear, that is, say and gear is provided with each input shaft in the first input shaft 911 and the second input shaft 912 actively Gear, gear driven gear is provided with each output shaft, that is, is sayed every in the first output shaft 921 and the second output shaft 922 Gear driven gear is provided with individual output shaft, gear driven gear accordingly engages with gear driving gear, more so as to form To speed than different gear pairs.
In some embodiments of the utility model, between input shaft and output shaft six gears can be used to be driven, that is, had First gear is secondary, second gear is secondary, three keep off gear pairs, four gear gear pairs, five gear gear pairs and six gear gear pairs.But this reality Be not limited to this with new, for the ordinary skill in the art, can according to transmission need and adaptability increase or Reduce the secondary number of shift gear, however it is not limited to six gear transmissions shown in the utility model embodiment.
As shown in figure 4, be arranged to can be with multiple output shafts (for example, the first output shaft 921, second is defeated for motor power axle 931 Shaft 922) in one linked, linked by motor power axle 931 with one in output shaft, so as to dynamic Power can be transmitted between one in motor power axle 931 and output shaft.For example, the power through the output shaft is (such as The power exported from engine 1) motor power axle 931 is may be output to, or the power through motor power axle 931 (such as comes from The power that power motor 2 exports) it also may be output to the output shaft.
It should be noted that above-mentioned " linkage " can be understood as multiple parts (for example, two) coupled movements, with two Exemplified by part linkage, wherein during a part motion, another part also moves therewith.
For example, in some embodiments of the utility model, gear and axle linkage can be understood as when gear rotates, The axle to be linked with it also will rotation, or when the axle rotate, the gear that is linked with it will also rotate.
And for example, when the linkage of axle and axle can be understood as that an axle rotates wherein, another axle being linked with it also general Rotation.
For another example, linked when gear and gear-linked can be understood as that a gear rotates wherein, with it another Gear also will rotation.
In the description about " linkage " below the utility model, if without specified otherwise, it is understood in this way.
Similarly, power motor 2 is arranged to link with motor power axle 931, for example, power motor 2 will can produce Power output to motor power axle 931, so as to output driving force to the wheel of hybrid vehicle by motor power axle 931 7。
Need explanation a bit, in description of the present utility model, motor power axle 931 can be power motor 2 itself Motor shaft.It is, of course, understood that the motor shaft of motor power axle 931 and power motor 2 can also be two single Axle.
In certain embodiments, as shown in figure 4, output section 221 is with respect to one (for example, second is defeated in output shaft Shaft 922) can differential rotate, in other words, output section 221 can independently be rotated from the output shaft with different rotating speeds.
Further, output section 221 is arranged to be selectively engageable one with same with the output shaft in output shaft Step rotates, and in other words, output section 221 being capable of differential rotation or synchronous axial system relative to the output shaft.In short, the phase of output section 221 Synchronous axial system is engageable to the one of output shaft, can also disconnect and be rotated with differential certainly.
As shown in figure 4, the output section 221 can be arranged on empty set on one in output shaft, but not limited to this.Example As in the example of fig. 4, the empty set of output section 221 is on the second output shaft 922, i.e. the output shaft 922 of output section 221 and second It can be rotated with different rotating speed differentials.
As described above, output section 221 can be with one synchronous axial system of output shaft, for example, can be by setting up correspondingly Synchronizer be achieved as desired by the synchronous effect of output section 221 and the output shaft.The synchronizer can be output section synchronizer 221c, output section synchronizer 221c are arranged for one in synchronism output portion 221 and output shaft.
In certain embodiments, power motor 2 is used for the wheel 7 for outputting driving force to hybrid vehicle, the He of engine 1 Power motor 2 drives the same wheel of hybrid vehicle jointly.With reference to Fig. 4 example, the differential mechanism 75 of vehicle can be arranged Between a pair of front-wheels 71 or between a pair of rear wheels 72, in some examples of the present utility model, when the one of the driving of power motor 2 During to front-wheel 71, differential mechanism 75 can be located between a pair of front-wheels 71.
The function of differential mechanism 75 is when turn inside diameter is travelled or travelled on uneven road surface, makes driving wheels with not Same angular speed rolls, to ensure to make PURE ROLLING between two side drive wheels and ground.Main reducing gear 8 is provided with differential mechanism 75 Main reducing gear driven gear 74, such as main reducing gear driven gear 74 can be arranged on the housing of differential mechanism 75.Main deceleration Device driven gear 74 can be bevel gear, but not limited to this.
In certain embodiments, as shown in figure 1, electrokinetic cell 3 is used to power to power motor 2；Auxiliary-motor 5 and engine 1 is connected, and auxiliary-motor 5 is also connected with power motor 2, DC-DC converter 4 and electrokinetic cell 3 respectively, and auxiliary-motor 5 is in engine 1 Drive under realize when being generated electricity and charge to electrokinetic cell 3, powered to power motor 2, powered to DC-DC converter 4 It is at least one.
Another specific embodiment of the dynamical system of hybrid vehicle, the implementation is described in detail in conjunction with Fig. 5 below Example is equally applicable to engine 1 and power motor 2 drives the dynamical system of same wheel, i.e. two driving mixed power automobiles jointly. It should be noted that the embodiment mainly describes a kind of specific drive mechanism between engine 1, power motor 2 and wheel 7, The structure of speed changer 90 in particularly Fig. 2, the embodiment of remainder and Fig. 1 and Fig. 3 is essentially identical, no longer superfluous in detail here State.
It should also be noted that, multiple input shafts, multiple output shafts and motor power axle 931 in example below and each Associated gear and shifting element etc. can be used to the speed changer 90 in pie graph 2 on axle.
In certain embodiments, as shown in Fig. 1, Fig. 3 and Fig. 5, the dynamical system of hybrid vehicle mainly includes starting Machine 1, power motor 2, electrokinetic cell 3, DC-DC converter 4, auxiliary-motor 5, multiple input shafts (for example, the first input shaft 911, Second input shaft 912), multiple output shafts (for example, the first output shaft 921, second output shaft 922) and motor power axle 931 and Associated gear and shifting element (e.g., synchronizer) on each axle.
As shown in figure 5, engine 1 outputs power to mixing by the double clutch 2d in clutch 6 such as Fig. 4 examples The wheel 7 of power vehicle.When entering action edge transmission between engine 1 and input shaft, engine 1 is arranged to pass through double clutch 2d is selectively engageable at least one in multiple input shafts.In other words, when engine 1 transmits power to input shaft, hair Motivation 1 can be engaged optionally to transmit power with one in multiple input shafts, or engine 1 can also be optionally Simultaneously engaged with two or more input shafts in multiple input shafts to transmit power.
For example, in the example of hgure 5, multiple input shafts can include the first input shaft 911 and the second input shaft 912 two Input shaft, the second input shaft 912 are coaxially set on the first input shaft 911, and engine 1 can be selected by double clutch 2d Engaged with one in the first input shaft 911 and the second input shaft 912 to transmit power to selecting property.Or especially, engine 1 can also simultaneously engage with to transmit power with the first input shaft 911 and the second input shaft 912.However, it is to be understood that start Machine 1 can also disconnect with the first input shaft 911 and the second input shaft 912 simultaneously.
Multiple output shafts can include 922 two output shafts of the first output shaft 921 and the second output shaft, the first output shaft 921 and second output shaft 922 be arranged in parallel with the first input shaft 911.
It can be driven between input shaft and output shaft by shift gear pair.For example, it is respectively provided with each input shaft There is gear driving gear, that is, say and gear is provided with each input shaft in the first input shaft 911 and the second input shaft 912 actively Gear, gear driven gear is provided with each output shaft, that is, is sayed every in the first output shaft 921 and the second output shaft 922 Gear driven gear is provided with individual output shaft, gear driven gear accordingly engages with gear driving gear, more so as to form To speed than different gear pairs.
In some embodiments of the utility model, between input shaft and output shaft six gears can be used to be driven, that is, had First gear is secondary, second gear is secondary, three keep off gear pairs, four gear gear pairs, five gear gear pairs and six gear gear pairs.But this reality Be not limited to this with new, for the ordinary skill in the art, can according to transmission need and adaptability increase or Reduce the secondary number of shift gear, however it is not limited to six gear transmissions shown in the utility model embodiment.
As shown in figure 5, the overhead set in output shaft (such as the first output shaft 921 and second output shaft 922) is set There is at least one reverse output gear 81, and be additionally provided with the output shaft same for engaging reversing gear for reverse output gear 81 Walk device (such as five gear synchronizer 5c, six gear synchronizer 6c), in other words, reverse output gear 81 corresponding to reverse gear synchronizer synchronization With the output shaft so that output shaft with by the synchronous reverse output gear 81 of reverse gear synchronizer can synchronous axial system, and then The power that reverses gear can export from the output shaft.
In certain embodiments, as shown in figure 5, reverse output gear 81 is one, a reverse output gear 81 can With empty set on the second output shaft 922.But the utility model is not limited to this, in further embodiments, reverse output gear 81 can also be two, two reverse output gears 81 simultaneously empty set on the second output shaft 922.It will of course be understood that It is that reverse output gear 81 can also be three or more than three.
Reverse gear shaft 89 is arranged to and a linkage in input shaft (such as the first input shaft 911 and second input shaft 912) And also linked with least one reverse output gear 81, for example, can be by falling through the power on one in input shaft Gear shaft 89 and pass to reverse output gear 81, so as to reverse gear, power can export from reverse output gear 81.It is new in this practicality In the example of type, reverse output gear 81 be empty set on the second output shaft 922, and reverse gear shaft 89 be and first input What axle 911 linked, such as the power that reverses gear that engine 1 exports can be by exporting to reversing gear after the first input shaft 911, reverse gear shaft 89 Output gear 81.
Motor power axle 931 is described in detail below.The overhead of motor power axle 931 set is provided with motor power axle the One gear 31, motor power axle second gear 32.Motor power axle first gear 31 can engage with main reducing gear driven gear 74 Transmission, to transmit driving force to the wheel 7 of hybrid vehicle.
Motor power axle second gear 32 is arranged to link with one of gear driven gear, with according to this practicality When the hybrid vehicle of the dynamical system of new embodiment is in some operating modes, the power of power source output can be in motor Transmitted between power axle second gear 32 and the gear driven gear to be linked with it, now motor power axle second gear 32 Linked with the gear driven gear.For example, motor power axle second gear 32 and two keeps off driven gear 2b linkages, motor power axle Second gear 32 can be engaged directly or by intermediate transmission part indirect drive with two gear driven gear 2b.
Further, motor power axle synchronizer 33c, motor power axle synchronizer 33c are additionally provided with motor power axle 931 Between motor power axle first gear 31 and motor power axle second gear 32, motor power axle synchronizer 33c can be selected Selecting property motor power axle first gear 31 or motor power axle second gear 32 are engaged with motor power axle 3.Such as in Fig. 5 Example in, motor power axle synchronizer 33c clutch collar is moved to the left engageable motor power axle second gear 32, moved right Dynamic then engageable motor power axle first gear 31.
Similarly, power motor 2 is arranged to link with motor power axle 931, for example, power motor 2 will can produce Power output to motor power axle 931, so as to output driving force to the wheel of hybrid vehicle by motor power axle 931 7。
For motor power axle first gear 31, because it is engaged with main reducing gear driven gear 74, therefore power Motor 2 can engage motor power axle first gear 31 by caused power directly from electricity by motor power axle synchronizer 33c Mechanomotive force axle first gear 31 exports, and can so shorten driving-chain, reduces intermediate transmission part, improves transmission efficiency.
Secondly the kind of drive of motor power axle 931 and power motor 2 is described in detail in conjunction with specific embodiments.
In certain embodiments, as shown in figure 5, being further fixedly arranged on the tooth of motor power axle the 3rd on motor power axle 931 Wheel 33, power motor 2 is arranged to and the 3rd gear of motor power axle 33 direct engaged transmission or indirect drive.
Further, the first motor gear 511 is provided with the motor shaft of power motor 2, the first motor gear 511 is in Between gear 512 be driven with the gear 33 of motor power axle the 3rd.And for example, power motor 2 can also coaxial phase with motor power axle 931 Even.
In certain embodiments, power motor 2 is used for the wheel 7 for outputting driving force to hybrid vehicle, the He of engine 1 Power motor 2 drives the same wheel of hybrid vehicle jointly.With reference to Fig. 5 example, the differential mechanism 75 of vehicle can be arranged Between a pair of front-wheels 71 or between a pair of rear wheels 72, in some examples of the present utility model, when the one of the driving of power motor 2 During to front-wheel 71, differential mechanism 75 can be located between a pair of front-wheels 71.
The function of differential mechanism 75 is when turn inside diameter is travelled or travelled on uneven road surface, makes driving wheels with not Same angular speed rolls, to ensure to make PURE ROLLING between two side drive wheels and ground.Main reducing gear 8 is provided with differential mechanism 75 Main reducing gear driven gear 74, such as main reducing gear driven gear 74 can be arranged on the housing of differential mechanism 75.Main deceleration Device driven gear 74 can be bevel gear, but not limited to this.
Further, the first output shaft output gear 211, the output of the first output shaft are fixedly installed on the first output shaft 921 Gear 211 engages with the synchronous axial system of the first output shaft 921, the first output shaft output gear 211 with main reducing gear driven gear 74 Transmission, so as to which the power through the first output shaft 921 can be transferred to main reducing gear driven tooth from the first output shaft output gear 211 Wheel 74 and differential mechanism 75.
Similarly, the second output shaft output gear 212, the output of the second output shaft are fixedly installed on the second output shaft 922 Gear 212 engages with the synchronous axial system of the second output shaft 922, the second output shaft output gear 212 with main reducing gear driven gear 74 Transmission, so as to which the power through the second output shaft 922 can be transferred to main reducing gear driven tooth from the second output shaft output gear 212 Wheel 74 and differential mechanism 75.
Similarly, motor power axle first gear 31 can be used for power of the output through motor power axle 931, therefore motor Power axle first gear 31 equally with the engaged transmission of main reducing gear driven gear 74.
In certain embodiments, as shown in figure 1, electrokinetic cell 3 is used to power to power motor 2；Auxiliary-motor 5 and engine 1 is connected, and auxiliary-motor 5 is also connected with power motor 2, DC-DC converter 4 and electrokinetic cell 3 respectively, and auxiliary-motor 5 is in engine 1 Drive under realize when being generated electricity and charge to electrokinetic cell 3, powered to power motor 2, powered to DC-DC converter 4 It is at least one.
Furthermore, as shown in fig. 6, the dynamical system of hybrid vehicle also includes control module 101, control module 101 are used to be controlled the dynamical system of hybrid vehicle.It should be appreciated that control module 101 can be hybrid power The controller with control function is integrated in automobile, such as can be in the entire car controller of hybrid vehicle, Fig. 3 embodiments The first controller 51 and the grade of second controller 21 integrated, but not limited to this.The institute of control module 101 is described in detail below The control method of execution.
Embodiment one：
In some embodiments of the utility model, control module 101 is used for the SOC value (State for obtaining electrokinetic cell 3 Of Charge, state-of-charge, are also dump energy), the maximum allowable generating work(of the SOC value of low tension battery 20 and auxiliary-motor 5 Rate, and judged according to the maximum allowable generated output of the SOC value of electrokinetic cell 3, the SOC value of low tension battery 20 and auxiliary-motor 5 Whether auxiliary-motor 5 charges to electrokinetic cell 3 and/or low tension battery 20.
It should be noted that the SOC value of electrokinetic cell 3 and low can be gathered by the battery management system of hybrid vehicle The SOC value of battery 20 is pressed, so as to which battery management system is by the SOC value of the electrokinetic cell 3 collected and low tension battery 20 SOC value is sent to control module 101, so that control module 101 obtains the SOC value and low tension battery 20 of electrokinetic cell 3 SOC value.
Thus, by power battery charging, it can be ensured that the power demand of power motor and high-voltage electrical equipment, and then really Power motor driving vehicle normally travel is protected, also, by being charged to low tension battery, it can be ensured that the electricity consumption of low voltage equipment Demand, and can realize that vehicle is low by low tension battery when auxiliary-motor stops generating and electrokinetic cell failure or not enough power supply Pressure power supply, and then ensure that vehicle can realize pure fuel oil pattern traveling, improve vehicle distance travelled.
According to a specific example of the present utility model, the maximum allowable generated output of auxiliary-motor 5 and auxiliary-motor 5 and start The correlations such as the performance parameter of machine 1, in other words, the maximum allowable generated output of auxiliary-motor 5 can be according to auxiliary-motor 5 and engines 1 The preset in advance such as performance parameter.
Further, it is additionally operable to according to one embodiment of the present utility model, control module 101, when electrokinetic cell 3 When SOC values are less than the SOC value of the first default SOC value and low tension battery 20 more than or equal to the second default SOC value, control is started Machine 1 drives auxiliary-motor 5 to be generated electricity to be charged to electrokinetic cell 3.
Wherein, it should be appreciated that the first default SOC value can be the charging limit value of electrokinetic cell 3, and second presets SOC Value can be the charging limit value of low tension battery 20, and the first default SOC value and the second default SOC value can each batteries itself successively Performance be independently arranged, can be same value, or different value.
Specifically, control module 101 get the SOC value of electrokinetic cell 3 and low tension battery 20 SOC value it Afterwards, can determine whether the SOC value of electrokinetic cell 3 is less than the first default SOC value, and judge low tension battery 20 SOC values whether Less than the second default SOC value, if the SOC value of electrokinetic cell 3 is less than the first default SOC value and the SOC value of low tension battery 20 More than or equal to the second default SOC value, then illustrate that the dump energy of electrokinetic cell 3 is relatively low, need to charge, and low tension battery 20 Dump energy is higher, drives auxiliary-motor 5 to be generated electricity with to power without charging, the now control of control module 101 engine 1 Battery 3 charges.
As it was previously stated, auxiliary-motor 5 belongs to high-voltage motor, such as the generating voltage of auxiliary-motor 5 and the voltage phase of electrokinetic cell 3 When so as to which electric energy caused by auxiliary-motor 5 can charge without voltage transformation directly to electrokinetic cell 3.
Similarly, control module 101 is additionally operable to, when the SOC value of electrokinetic cell 3 is more than or equal to the first default SOC value and low When pressing the SOC value of battery 20 to be less than the second default SOC value, control engine 1 drives auxiliary-motor 5 to be generated electricity to pass through DC- DC converters 4 charge to low tension battery 20.
That is, if the SOC value of electrokinetic cell 3 is more than or equal to the SOC of the first default SOC value and low tension battery 20 Value is less than the second default SOC value, then illustrates that the dump energy of electrokinetic cell 3 is higher, need not charge, and low tension battery 20 Dump energy is relatively low, needs to charge, and now control module 101 controls engine 1 to drive auxiliary-motor 5 to be generated electricity to pass through DC- DC converters 4 charge to low tension battery 20.
As it was previously stated, auxiliary-motor 5 belongs to high-voltage motor, such as the generating voltage of auxiliary-motor 5 and the voltage phase of electrokinetic cell 3 When so as to which electric energy caused by auxiliary-motor 5 need to fill to low tension battery 20 again after DC-DC converter 4 carries out voltage transformation Electricity.
Further, it is additionally operable to according to one embodiment of the present utility model, control module 101：When electrokinetic cell 3 When SOC value is less than the SOC value of the first default SOC value and low tension battery 20 less than the second default SOC value, according to electrokinetic cell 3 SOC value obtain the charge power of electrokinetic cell 3, and low tension battery 20 is obtained according to the SOC value of low tension battery 20 and filled Electrical power, and in the charge power of electrokinetic cell 3 and maximum of the charge power sum of low tension battery 20 more than auxiliary-motor 5 Allow generated output when, control engine 1 drive auxiliary-motor 5 generated electricity with by DC-DC converter 4 to low tension battery 20 Charging.
Also, control module 101 is additionally operable to, when the charge power of the charge power and low tension battery 20 of electrokinetic cell 3 When sum is less than or equal to the maximum allowable generated output of auxiliary-motor 5, control engine 1 drives auxiliary-motor 5 to be generated electricity with to dynamic Power battery 3 charges, while is charged by DC-DC converter 4 to low tension battery 20.
That is, if the SOC value of electrokinetic cell 3 is less than the first default SOC value and the SOC values of low tension battery 20 Less than the second default SOC value, then illustrate that the dump energy of electrokinetic cell 3 and low tension battery 20 is relatively low, need to charge, now Control module 101 calculates the charge power of electrokinetic cell 3 according to the SOC value of electrokinetic cell 3, and according to low tension battery 20 SOC value calculates the charge power of low tension battery 20, and determines whether the charge power and low tension battery of electrokinetic cell 3 Whether 20 charge power sum is more than the maximum allowable generated output of auxiliary-motor 5.
If the charge power sum of the charge power of electrokinetic cell 3 and low tension battery 20 is more than the maximum of auxiliary-motor 5 Allow generated output, then illustrate that the electric energy that auxiliary-motor 5 can be generated is not enough to two batteries while charged, now preferentially give Low tension battery 20 charges, that is, control engine 1 drive auxiliary-motor 5 generated electricity with by DC-DC converter 4 to low pressure electric power storage Charge in pond 20.
If the charge power sum of the charge power of electrokinetic cell 3 and low tension battery 20 is less than or equal to auxiliary-motor 5 Maximum allowable generated output, then illustrate that electric energy that auxiliary-motor 5 can be generated to two batteries while can charge, now give simultaneously Electrokinetic cell 3 and low tension battery 20 charge, that is, control engine 1 to drive auxiliary-motor 5 to be generated electricity to be filled to electrokinetic cell 3 Electricity, while charged by DC-DC converter 4 to low tension battery 20.
Thus, by preferentially being charged to low tension battery, the power demand of low voltage equipment, Jin Erke can preferentially be ensured Ensure that vehicle realizes pure fuel oil pattern traveling in electrokinetic cell not enough power supply, improve vehicle distance travelled.
However, it is to be understood that when the SOC value of electrokinetic cell 3 is more than or equal to the first default SOC value and low tension battery When 20 SOC value is more than or equal to the second default SOC value, illustrate the dump energy of electrokinetic cell 3 and low tension battery 20 is higher, Without charging, electrokinetic cell 3 and low tension battery 20 can not now be charged.
As described above, during hybrid electric vehicle is sailed, control module 101 can obtain the SOC of electrokinetic cell 3 in real time The SOC value of value and low tension battery 20, and SOC value to electrokinetic cell 3 and the SOC value of low tension battery 20 judge, sentence Disconnected result can be divided into following four：
The first situation is that the dump energy of electrokinetic cell 3 is relatively low, and the dump energy of low tension battery 20 is higher, i.e., The SOC value of electrokinetic cell 3 is less than the first default SOC value and the SOC value of low tension battery 20 is more than or equal to the second default SOC values, Now, control module 101 controls engine 1 to drive auxiliary-motor 5 to be generated electricity to be charged to electrokinetic cell 3；
Second of situation is that the dump energy of electrokinetic cell 3 is higher, and the dump energy of low tension battery 20 is relatively low, i.e., The SOC value of electrokinetic cell 3 is more than or equal to the first default SOC value and the SOC value of low tension battery 20 is less than the second default SOC values, Now, control module 101 control engine 1 drive auxiliary-motor 5 generated electricity with by DC-DC converter 4 to low tension battery 20 chargings；
The third situation is that the dump energy of electrokinetic cell 3 and the dump energy of low tension battery 20 are relatively low, i.e. power The SOC value of battery 3 is less than the first default SOC value and the SOC value of low tension battery 20 is less than the second default SOC value, now, can root Judge whether to charge and (preferentially charge to low tension battery 20) to electrokinetic cell 3 according to the maximum allowable generated output of auxiliary-motor 5, If the charge power sum of the charge power of electrokinetic cell 3 and low tension battery 20 is more than the maximum allowable generating of auxiliary-motor 5 Power, then do not charge to electrokinetic cell 3, only charged to low tension battery 20, i.e., control module 101 controls engine 1 to drive pair Motor 5 is generated electricity to be charged by DC-DC converter 4 to low tension battery 20；If the charge power of electrokinetic cell 3 with it is low Press the charge power sum of battery 20 to be less than or equal to the maximum allowable generated output of auxiliary-motor 5, then filled to low tension battery 20 Return electrokinetic cell 3 while electric to charge, i.e., control module 101 controls engine 1 to drive auxiliary-motor 5 to be generated electricity with to power Battery 3 charges, while is charged by DC-DC converter 4 to low tension battery 20.
4th kind of situation is that the dump energy of electrokinetic cell 3 and low tension battery 20 is higher, i.e. the SOC of electrokinetic cell 3 Value is more than or equal to the first default SOC value and the SOC value of low tension battery 20 is more than or equal to the second default SOC value, now, not to dynamic Power battery 3 and low tension battery 20 charge.
To sum up, the dynamical system of the hybrid vehicle proposed according to the utility model embodiment, engine pass through clutch Device outputs power to the wheel of hybrid vehicle, and power motor outputs driving force to the wheel of hybrid vehicle, power Battery is powered to power motor, to realize to power battery charging, to dynamic when auxiliary-motor is generated electricity under the drive of engine Force motor power supply, powered to DC-DC converter at least one, SOC value of the control module according to electrokinetic cell, low pressure electric power storage The SOC value in pond and the maximum allowable generated output of motor judge whether auxiliary-motor is carried out to electrokinetic cell and/or low tension battery Charging, so as to make engine be not involved in driving in low speed, and then without using clutch, reduce clutch abrasion or cunning Mill, while reduce pause and transition in rhythm or melody sense, comfortableness is improved, and engine can be made to be operated in economic zone in low speed, only send out Electricity does not drive, and reduces oil consumption, reduces engine noise, maintains vehicle low speed electric equilibrium and low speed ride comfort, lifts vehicle performance, And the system may be either power battery charging, or low tension battery charging, so as to can ensure that power motor and high-tension electricity The power demand of device equipment, and then ensure that power motor drives vehicle normally travel, and can ensure that the use of low voltage equipment Electric demand, and then can be when auxiliary-motor stops generating and electrokinetic cell failure or not enough power supply, it is ensured that vehicle can realize pure fuel oil Pattern travels, and improves vehicle distance travelled.
Embodiment two：
In some embodiments of the utility model, control module 101 is used for the SOC value (State for obtaining electrokinetic cell 3 Of Charge, state-of-charge, are also dump energy) and hybrid vehicle vehicle velocity V, and according to the SOC values of electrokinetic cell 3 Enter generated output shaping modes with the vehicle velocity V of hybrid vehicle control auxiliary-motor 5 so that engine 1 operate in it is default Optimal economic region.Wherein, generated output shaping modes are the pattern that the generated output of engine is adjusted, and are being generated electricity Power adjusting pattern, it can be adjusted by controlling engine 1 to drive auxiliary-motor 5 to be generated electricity with the generated output to auxiliary-motor 5 Section.
It should be noted that the SOC value of electrokinetic cell 3 can be gathered by the battery management system of hybrid vehicle, from And the SOC value of the electrokinetic cell 3 collected is sent to control module 101 by battery management system, so that control module 101 obtains The SOC value of electrokinetic cell 3.
It should be noted that the default optimal economic region that engine's fuel consumption characteristics loop image determines engine 1 can be combined. An example of engine's fuel consumption characteristics loop image is illustrated in figure 7, wherein, side ordinate is the output torque of engine 1, horizontal Coordinate is the rotating speed of engine 1, and curve a is the fuel-economy curve of engine 1.Region corresponding to fuel-economy curve is to send out The optimal economic region of motivation, that is, say when the torque of engine 1 and moment of torsion are located on the fuel-economy curve of engine optimum, Engine is in optimal economic region.Thus, in the utility model embodiment, control module 101 can be by controlling engine 1 Rotating speed and output torque fall in engine fuel economic curve for example on curve a so that engine 1 operate in it is default optimal Economic zone.
Specifically, during hybrid electric vehicle is sailed, engine 1 can be output power to mixed by clutch 6 The wheel 7 of power vehicle is closed, and engine 1 can also drive auxiliary-motor 5 to be generated electricity.Thus, the power output master of engine To include two parts, part output to auxiliary-motor 5, that is, the generated output for driving auxiliary-motor 5 to be generated electricity, another part is defeated Go out to the driving power of wheel 7, i.e. driving moment 7.
When engine 1 drives auxiliary-motor 5 to be generated electricity, control module 101 can obtain the SOC value of electrokinetic cell 3 first With the speed of hybrid vehicle, auxiliary-motor 5 is then controlled according to the SOC value of electrokinetic cell 3 and the speed of hybrid vehicle Into generated output shaping modes, so that engine 1 is operated in default optimal economic region.In generated output shaping modes, Control module master controller 101 can adjust auxiliary-motor 5 on the premise of engine 1 is operated in default optimal economic region Generated output.
Thereby, it is possible to make engine 1 be operated in default optimal economic region, because engine 1 is in default optimal warp Help region oil consumption is minimum, fuel economy highest, so as to reduce the oil consumption of engine 1, reduce the noise of engine 1, carry The economy of high vehicle operation.Auxiliary-motor 5 has higher generated output and generating efficiency when being additionally, since low speed, so as to To meet the power demand run at a low speed, vehicle low speed electric equilibrium can be maintained, vehicle low speed ride comfort is maintained, lifts vehicle Power performance.Wherein, by power battery charging, it can be ensured that the power demand of power motor and high-voltage electrical equipment, and then Ensure that power motor drives vehicle normally travel.
Further, it is used for according to one embodiment of the present utility model, control module 101：As the SOC of electrokinetic cell 3 When value is more than default limiting value M2 and is less than or equal to the first preset value M1, if the vehicle velocity V of hybrid vehicle is less than first Preset vehicle speed V1, control auxiliary-motor 5 enter generated output shaping modes.
Wherein, the first preset value can be the upper bound limit value of the SOC value of the electrokinetic cell 3 pre-set, for example, stop filling The decision content of electricity, is preferably 30%.Default limiting value can be the lower bound limit value of the SOC value of the electrokinetic cell 3 pre-set, For example, stop the decision content of electric discharge, be preferably 10%.Can be by electrokinetic cell according to the first preset value and default limiting value 3 SOC value is divided into three sections, i.e. the first electricity section, the second electricity section and the 3rd electricity section, when electrokinetic cell 3 When SOC value is less than or equal to default limiting value, the SOC value of electrokinetic cell 3 is in the first electricity section, now electrokinetic cell 3 Only charging is not discharged；When the SOC value of electrokinetic cell 3 is more than default limiting value and is less than or equal to the first preset value, power The SOC value of battery 3 is in the second electricity section, and now electrokinetic cell 3 has charge requirement, you can is actively filled to electrokinetic cell 3 Electricity；When the SOC value of electrokinetic cell 3 is more than the first preset value, the SOC value of electrokinetic cell 3 is in the 3rd electricity section, now moves Power battery 3 can not charge, i.e., actively will not be charged to electrokinetic cell 3.
Specifically, control module 101, can after the SOC value and the speed of hybrid vehicle for obtaining electrokinetic cell 3 Judge the section residing for the SOC value of electrokinetic cell 3, if the SOC value of electrokinetic cell 3 is in middle electricity section, electrokinetic cell 3 SOC value is more than default limiting value and is less than or equal to the first preset value, then explanation can charge to electrokinetic cell 3, now Control module 101 determines whether the speed of hybrid vehicle is less than the first preset vehicle speed, if hybrid vehicle Speed be less than the first preset vehicle speed, then control auxiliary-motor 5 enter generated output shaping modes, now hybrid vehicle car Speed is relatively low, and required driving force is less, and power motor 2 is enough to drive hybrid electric vehicle to sail, and engine 1 can only drive secondary electricity Machine 5 is generated electricity, and is not involved in driving.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
Further, it is additionally operable to according to one embodiment of the present utility model, control module 101：When electrokinetic cell 3 SOC values are more than default limiting value M2 and the vehicle velocity V less than or equal to the first preset value M1 and hybrid vehicle is less than the During one preset vehicle speed V1, the vehicle demand power P2 of hybrid vehicle is obtained, and be less than or equal to pair in vehicle demand power P2 During the maximum allowable generated output Pmax of motor 5, control auxiliary-motor 5 enters generated output shaping modes.
Specifically, during the traveling of hybrid vehicle, if the SOC value of electrokinetic cell 3 is more than default pole Limit value M2 and vehicle velocity V less than or equal to the first preset value M1 and hybrid vehicle is less than the first preset vehicle speed V1, that is, mix The speed of power vehicle is relatively low, and control module 101 then obtains the vehicle demand power P2 of hybrid vehicle, and in vehicle demand When power P 2 is less than or equal to the maximum allowable generated output Pmax of auxiliary-motor 5, control auxiliary-motor 5 enters generated output regulation mould Formula.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
Further, according to one embodiment of the present utility model, control module 101 is additionally operable to when electrokinetic cell 3 SOC values are more than default limiting value and the vehicle velocity V less than or equal to the first preset value M1, hybrid vehicle is less than first and preset When vehicle velocity V 1 and vehicle demand power P2 are less than or equal to the maximum allowable generated output Pmax of auxiliary-motor 5, hybrid power vapour is obtained The gas pedal depth D of the car and vehicle resistance F of hybrid vehicle, and be less than or equal to first in gas pedal depth D and preset When the vehicle resistance F of depth D1 and hybrid vehicle is less than or equal to the first default resistance F1, control auxiliary-motor 5, which enters, to generate electricity Power adjusting pattern.
It should be noted that the car resistance that the vehicle resistance of hybrid vehicle can be hybrid vehicle for example rolls Resistance, acceleration resistance, grade resistance and air drag etc..
Specifically, if the SOC value of electrokinetic cell 3 be more than default limiting value and less than or equal to the first preset value M1, The vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed V1 and vehicle demand power P2 permits less than or equal to the maximum of auxiliary-motor 5 Perhaps generated output Pmax, control module 101 then obtain the gas pedal depth D and hybrid vehicle of hybrid vehicle in real time Vehicle resistance F, the vehicle resistance F that the first predetermined depth D1 and hybrid vehicle are less than or equal to as gas pedal depth D is small When equal to the first default resistance F1, control module 101 controls auxiliary-motor 5 to enter generated output shaping modes.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
As above, when hybrid vehicle is run at a low speed, engine 1 can only generate electricity and be not involved in driving, due to engine not Driving is participated in, clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving easypro Adaptive, also, engine is operated in economic zone in low speed, due to oil consumption of the engine in default optimal economic region Minimum, fuel economy highest, so as to reduce oil consumption, engine noise is reduced, the economy of vehicle operation is improved, so as to tie up Vehicle low speed electric equilibrium and low speed ride comfort are held, lifts vehicle performance.
Correspondingly, when hybrid vehicle electrokinetic cell 3 SOC value, vehicle velocity V, gas pedal depth D and vehicle resistance When F is unsatisfactory for above-mentioned condition, engine 1 may participate in driving, and its specific work process is as follows.
According to one embodiment of the present utility model, control module 101 is additionally operable to：It is less than in the SOC value of electrokinetic cell 3 pre- If limiting value or the speed of hybrid vehicle be more than or equal to the first preset vehicle speed or vehicle demand power and be more than secondary electricity The maximum allowable generated output or gas pedal depth of machine 5 are more than the vehicle of the first predetermined depth or hybrid vehicle When resistance is more than the first default resistance, control engine 1 participates in driving.
That is, in speed of the SOC value of electrokinetic cell 3 less than default limiting value M2 or hybrid vehicle The maximum allowable generated output or throttle for being more than auxiliary-motor 5 more than or equal to the first preset vehicle speed or vehicle demand power are stepped on When plate depth is more than the vehicle resistance of the first predetermined depth or hybrid vehicle more than the first default resistance, control module 101 control engines 1 participate in driving, and now, electrokinetic cell 3 no longer discharges, the driving force needed for vehicle is larger, vehicle demand work( Rate is larger, gas pedal depth is larger or vehicle resistance is also larger, and power motor 2 is not enough to drive hybrid electric vehicle to sail, Engine 1 participates in driving to carry out supplying driving.
Thus, engine 1 can participate in driving in the driving force deficiency that power motor 2 exports, so that it is guaranteed that vehicle is normal Traveling, the power performance of vehicle is improved, improve the distance travelled of vehicle.
More specifically, control module 101 is additionally operable to：When vehicle demand power is more than the maximum allowable generating work(of auxiliary-motor 5 During rate, engine 1 is also controlled to participate in driving so that engine 1 outputs power to wheel by clutch 6.
Also, control module 101 is additionally operable to：When the SOC value of electrokinetic cell 3 is less than default limiting value M2, control hair Motivation 1 participates in driving so that engine 1 outputs driving force to wheel 7 by clutch 6；When the SOC values of electrokinetic cell 3 are less than Vehicle velocity V equal to the first preset value M1, hybrid vehicle is less than the first preset vehicle speed V1 and gas pedal depth D and is more than the During one predetermined depth D1, control module 101 controls engine 1 to participate in driving so that engine 1 is defeated by power by clutch 6 Go out to wheel 7；When the SOC value of electrokinetic cell 3 is less than or equal to the first preset value M1, the vehicle velocity V of hybrid vehicle is less than first When the resistance F of preset vehicle speed V1 and hybrid vehicle is more than the first default resistance F1, control module 101 controls engine 1 to join With driving so that engine 1 outputs power to wheel 7 by clutch 6.
Specifically, generated electricity in the drive auxiliary-motor 5 of engine 1 and power motor 2 outputs driving force to hybrid power During the wheel 7 of automobile, control module 101 obtains the SOC value of electrokinetic cell 3, the gas pedal depth of hybrid vehicle in real time D, vehicle velocity V and vehicle resistance F, and SOC value to electrokinetic cell 3, the gas pedal depth D of hybrid vehicle, vehicle velocity V and whole Car resistance F is judged.
First, when the SOC value of electrokinetic cell 3 is less than default limiting value M2, control module 101 controls engine 1 logical Cross clutch 6 and output power to wheel 7, so that engine 1 and power motor 2 simultaneously participate in driving, reduce power motor 2 Load is to reduce the power consumption of electrokinetic cell 3, so as to ensure that engine 1 is operated in default optimal economic region, simultaneously Avoid the SOC value rapid decrease of electrokinetic cell 3.
Second, when the SOC value of electrokinetic cell 3 is less than or equal to the first preset value M1, the vehicle velocity V of hybrid vehicle is less than the One preset vehicle speed V1 and when gas pedal depth D is more than the first predetermined depth D1, control module 101 control engine 1 by from Clutch 6 outputs power to wheel 7, so that engine 1 and power motor 2 simultaneously participate in driving, reduces the load of power motor 2 To reduce the power consumption of electrokinetic cell 3, so as to ensure that engine 1 is operated in default optimal economic region, avoid simultaneously The SOC value rapid decrease of electrokinetic cell 3.
Third, when the SOC value of electrokinetic cell 3 is less than or equal to the first preset value M1, the vehicle velocity V of hybrid vehicle is less than the When the resistance F of one preset vehicle speed V1 and hybrid vehicle is more than the first default resistance F1, control module 101 controls engine 1 Wheel 7 is output power to by clutch 6, so that engine 1 and power motor 2 simultaneously participate in driving, reduces power motor 2 Load to reduce the power consumption of electrokinetic cell 3, so as to ensure that engine 1 is operated in default optimal economic region, together When avoid the SOC value rapid decrease of electrokinetic cell 3.
Thus, engine 1 can participate in driving in the driving force deficiency that power motor 2 exports, so that it is guaranteed that vehicle is normal Traveling, the power performance of vehicle is improved, improve the distance travelled of vehicle.Also, controllable engine is operated in economic zone Domain, because oil consumption of the engine 1 in default optimal economic region is minimum, fuel economy highest, so as to reduce oil consumption, drop Low engine noise, improve vehicle economic performance.
In addition, control module 101 is additionally operable to：When the SOC value of electrokinetic cell 3 is less than or equal to default limiting value, and mixing When the speed of power vehicle is more than the first preset vehicle speed, control engine 1 will participate in driving so that engine 1 will by clutch 6 Power output is to wheel 7.
Thus, engine 1 can participate in driving in the driving force deficiency that power motor 2 exports, so that it is guaranteed that vehicle is normal Traveling, the power performance of vehicle is improved, improve the distance travelled of vehicle.
However, it is to be understood that control module 101 is additionally operable to：When the SOC value of electrokinetic cell 3 is more than the first preset value When, engine 1 does not drive auxiliary-motor 5 to be generated electricity, and now the electricity of electrokinetic cell 3 is close to full electricity, without charging, engine 1 Auxiliary-motor 5 is not driven to be generated electricity.That is, when the electricity of electrokinetic cell 3 is close full electric, engine 1 does not drive secondary electricity Machine 5 is generated electricity, so as to which auxiliary-motor 5 does not charge to electrokinetic cell 3.
Furthermore, after auxiliary-motor 5 enters generated output shaping modes, control module 101 can be to the hair of auxiliary-motor 5 Electrical power is adjusted, and the generated output regulation process of the control module 101 of the utility model embodiment is carried out specifically below Description.
According to one embodiment of the present utility model, control module 101 is additionally operable to：Adjusted when auxiliary-motor 5 enters generated output After section pattern, the hair according to the charge power P3 of the vehicle demand power P2 of hybrid vehicle and electrokinetic cell 3 to auxiliary-motor 5 Electrical power P 1 is adjusted.
According to one embodiment of the present utility model, according to the vehicle demand power P2 and electrokinetic cell of hybrid vehicle Charge power P3 regulation auxiliary-motor 5 generated output P1 formula it is as follows：
P1=P2+P3, wherein, P2=P11+P21,
P1 is the generated output of auxiliary-motor 5, and P2 is vehicle demand power, and P3 is the charge power of electrokinetic cell 3, and P11 is Vehicle driving power, P21 are electric equipment power.
It should be noted that electric equipment includes the first electric equipment 10 and the second electric equipment 30, i.e. electric equipment work( Rate P21 may include high-voltage electrical equipment and the power needed for low voltage equipment.
It should be noted that vehicle driving power P11 may include the power output of power motor 2, control module 101 can root Vehicle driving power P11 is obtained according to the rotating speed of the default throttle-torque curve and power motor 2 of power motor 2, wherein, in advance If throttle-torque curve can be determined when hybrid electric vehicle power matches.In addition, control module 101 can be according to vehicle The electric equipment of operation obtains electric equipment power P 21 in real time, such as calculates electric equipment power by DC consumption in bus P21.In addition, control module 101 can obtain the charge power P3 of electrokinetic cell 3 according to the SOC value of electrokinetic cell 3.Assuming that in real time The vehicle driving power P11=b1kw of acquisition, electric equipment power P 21=b2kw, the charge power P3=of electrokinetic cell 3 B3kw, then auxiliary-motor 5 generated output=b1+b2+b3.
Specifically, during hybrid electric vehicle is sailed, control module 101 can obtain the charging work(of electrokinetic cell 3 Rate P3, vehicle driving power P11 and electric equipment power P 21, and by the charge power P3 of electrokinetic cell 3, vehicle driving power The generated output P1 of P11 and the sum of electric equipment power P 21 as auxiliary-motor 5, thus, control module 101 can be according to calculating P1 values the generated output of auxiliary-motor 5 is adjusted, such as control module 101 can be according to the P1 values calculated to engine 1 Output torque and rotating speed be controlled, to drive the power that is generated electricity of auxiliary-motor 5 to be adjusted in engine 1.
Further, it is additionally operable to according to one embodiment of the present utility model, control module 101：Obtain electrokinetic cell 3 SOC value rate of change, and according to vehicle demand power P2 minimum output powers corresponding with the optimal economic region of engine 1 The generated output P1 of the SOC value rate of change regulation auxiliary-motor 5 of relation and electrokinetic cell between Pmin.
It should be appreciated that the SOC value that control module 101 can obtain electrokinetic cell 3 according to the SOC value of electrokinetic cell 3 becomes Change speed, for example, each time interval t gathers the SOC value of an electrokinetic cell 3, so can be by the current SOC of electrokinetic cell 3 Value and the difference of previous SOC value and SOC value rate of change of the time interval t ratio as electrokinetic cell 3.
Specifically, the optimal economic region of engine can be determined according to the universal characteristic curve of engine shown in Fig. 7, is entered And obtain minimum output power Pmin corresponding to the optimal economic region of engine, control module 101 it is determined that engine most After minimum output power Pmin corresponding to good economic zone, you can according to vehicle demand power P2 and the optimal warp of engine 1 The SOC value rate of change regulation auxiliary-motor 5 of relation and electrokinetic cell 3 between minimum output power Pmin corresponding to Ji region Generated output.
Thus, when hybrid vehicle is run at a low speed, engine is operated in economic zone, oil consumption can be reduced, reduce Engine noise, the economic performance of vehicle is improved, also, in low speed, engine 1 only generating can be not involved in driving, due to starting Machine is not involved in driving, and clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving Comfortableness, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.
It is described further below after auxiliary-motor 5 enters generated output shaping modes, control module 101 is according to vehicle demand Relation and electrokinetic cell 3 between the minimum output power Pmin corresponding with the optimal economic region of engine 1 of power P 2 The specific regulative mode of the generated output of SOC value rate of change regulation auxiliary-motor 5.
Specifically, generated electricity in the drive auxiliary-motor 5 of engine 1 and power motor 2 outputs driving force to hybrid power During the wheel 7 of automobile, vehicle driving power P11 and electric equipment power P 21 are obtained in real time, to obtain the whole of hybrid vehicle Car demand power P2, control module 101 judged the vehicle demand power P2 of hybrid vehicle, wherein, vehicle demand Power P 2 can meet following three kinds of situations.
The first situation is：Vehicle demand power P2 is less than minimum output work corresponding to the optimal economic region of engine 1 Rate Pmin；Second of situation be：Vehicle demand power P2 is more than or equal to minimum output corresponding to the optimal economic region of engine Power P min and the maximum allowable generated output Pmax for being less than or equal to auxiliary-motor 5；The third situation is：Vehicle demand power P2 More than the maximum allowable generated output Pmax of auxiliary-motor 5.
In one embodiment of the first situation, when vehicle demand power P2 is less than the optimal economic region of engine 1 During corresponding minimum output power Pmin, control module 101 obtains electrokinetic cell according to the SOC value rate of change of electrokinetic cell 3 3 charge power P3, and judge whether the charge power P3 of electrokinetic cell 3 is less than minimum output power Pmin and vehicle demand The difference of power P 2, wherein, if the charge power P3 of electrokinetic cell 3 is less than minimum output power Pmin and vehicle demand power P2 difference, then engine 1 is controlled to be generated electricity with minimum output power Pmin to adjust the generated output P1 of auxiliary-motor 5；Such as The charge power P3 of fruit electrokinetic cell 3 is more than or equal to minimum output power Pmin and vehicle demand power P2 difference, then basis Charge power P3 and vehicle demand power the P2 sum of electrokinetic cell 3 obtain engine 1 in default optimal economic region Power output, and the power output for controlling engine to obtain is generated electricity to adjust the generated output P1 of auxiliary-motor 5.
It should be noted that the SOC value rate of change for the electrokinetic cell 3 that can be prestored in control module 101 and electrokinetic cell 3 The first relation table between charge power P3, thus, control module 101 obtain electrokinetic cell 3 SOC value rate of change it Afterwards, the charge power P3 of corresponding electrokinetic cell 3 can be obtained by comparing the first relation table.The SOC values of electrokinetic cell 3 become The charge power P3 of change speed and electrokinetic cell 3 meets the relation shown in table 1 below.
Table 1
The SOC value rate of change of electrokinetic cell 3 A1 A2 A3 A4 A5
The charge power P3 of electrokinetic cell 3 B1 B2 B3 B4 B5
As known to table 1, when the SOC value rate of change that control module 101 is got is A1, the corresponding power that gets The charge power P3 of battery 3 is B1；When the SOC value rate of change that control module 101 is got is A2, what is got is corresponding The charge power P3 of electrokinetic cell 3 is B2；When the SOC value rate of change that control module 101 is got is A3, get The charge power P3 of corresponding electrokinetic cell 3 is B3；When the SOC value changes speed that control module 101 is got is A4, obtain The charge power P3 for the corresponding electrokinetic cell 3 got is B4；When the SOC value rate of change that control module 101 is got is A5 When, the charge power P3 of the corresponding electrokinetic cell 3 got is B5.
Specifically, after auxiliary-motor 5 enters generated output shaping modes, control module 101 obtains vehicle driving in real time Power P 11 and electric equipment power P 21, to obtain the vehicle demand power P2 of hybrid vehicle, and to hybrid vehicle Vehicle demand power P2 judged.When vehicle demand power P2 is less than minimum corresponding to the optimal economic region of engine 1 During power output Pmin, the charge power P3 of electrokinetic cell 3 can be obtained according to the SOC value rate of change of electrokinetic cell 3, and judge Whether the charge power P3 of electrokinetic cell 3 is less than minimum output power Pmin and vehicle demand power P2 difference.
When vehicle demand power P2 is less than minimum output power Pmin corresponding to the optimal economic region of engine 1, such as The charge power P3 of fruit electrokinetic cell 3 is less than minimum output power Pmin and vehicle demand power P2 difference, i.e. P3 ＜ Pmin-P2, then by controlling engine 1 to be generated electricity with minimum output power Pmin to adjust the generated output of auxiliary-motor 1； If the charge power P3 of electrokinetic cell 3 is more than or equal to minimum output power Pmin and vehicle demand power P2 difference, i.e. P3 >=Pmin-P2, then engine 1 is obtained default according to the charge power P3 of electrokinetic cell 3 and vehicle demand power P2 sums Power output in optimal economic region, and it is secondary electric to adjust by controlling engine 1 to be generated electricity with the power output of acquisition The generated output of machine 5.
Thus, when vehicle demand power P2 is less than minimum output power Pmin corresponding to the optimal economic region of engine 1 When, according to the charge power P3 of electrokinetic cell 3 minimum output power Pmins corresponding with the optimal economic region of engine 1 with it is whole The generated output of the Relation acquisition engine 1 of car demand power P2 difference, so that engine 1 operates in default optimal economic area Domain, and engine 1 is only generated electricity and is not involved in driving, and so as to reduce the oil consumption of engine, and reduces making an uproar for engine Sound.
In one embodiment of second of situation, when vehicle demand power P2 is more than or equal to the optimal economic area of engine Minimum output power Pmin corresponding to domain and less than or equal to auxiliary-motor 5 maximum allowable generated output Pmax when, control module 101 The charge power P3 of electrokinetic cell 3 is obtained according to the SOC value rate of change of electrokinetic cell 3, and according to the charging work(of electrokinetic cell 3 Rate P3 obtains power output of the engine 1 in default optimal economic region with vehicle demand power P2 sums, and passes through Control engine 1 is generated electricity with the power output of acquisition to adjust the generated output P1 of auxiliary-motor 5.
Specifically, when vehicle demand power P2 is more than or equal to minimum output corresponding to the optimal economic region of engine 1 Power P min and less than auxiliary-motor 5 maximum allowable generated output Pmax when, control module 101 control engine 1 be operated in SOC value rate of change during default optimal economic region always according to electrokinetic cell 3 obtains the charge power P3 of electrokinetic cell 3, And engine 1 is obtained in default optimal economic area according to charge power P3 and vehicle demand power the P2 sum of electrokinetic cell 3 Power output in domain, wherein, power output=P3+P2 of acquisition.And then control module 101 controls engine 1 to obtain Power output generated electricity to adjust the generated output P1 of auxiliary-motor 5 so that the SOC value increase of electrokinetic cell 3, and makes hair Motivation 1 is operated in default optimal economic region.
Thus, when vehicle demand power P2 is more than or equal to minimum output power corresponding to the optimal economic region of engine 1 Pmin and less than auxiliary-motor 5 maximum allowable generated output Pmax when, according to the charge power P3 of electrokinetic cell 3 and vehicle need Ask the sum of power P 2 to obtain the power output of engine 1, so that engine 1 operates in default optimal economic region, and start Machine 1 is only generated electricity and is not involved in driving, and so as to reduce the oil consumption of engine, and reduces the noise of engine.
In one embodiment of the third situation, when vehicle demand power P2 is more than the maximum allowable generating of auxiliary-motor 5 During power P max, control module 101 also controls engine 1 to participate in driving so that engine 1 is outputed power by clutch 6 To wheel 7.
Specifically, when the vehicle demand power P2 maximum allowable generated output Pmax for being more than auxiliary-motor 5 are hybrid power The vehicle demand power P2 of automobile be higher than auxiliary-motor 5 generated output P1 when, control module 101 also control engine 1 by from Clutch 6 outputs driving force to wheel 7 so that engine 1 participates in driving, so as to by engine 1 undertake part driving power P ＇, To reduce the demand to the generated output P1 of auxiliary-motor 5, engine 1 is set to be operated in default optimal economic region.
Thus, when vehicle demand power P2 is more than the maximum allowable generated output Pmax of auxiliary-motor 5, electrokinetic cell 3 is right Outer electric discharge to power motor 2 to power, and now, control module 101 controls engine 1 and power motor 2 to output power simultaneously To the wheel 7 of hybrid vehicle, so that engine 1 is operated in default optimal economic region.
Thus, in low speed, engine can be operated in economic zone, and only generate electricity and be not involved in driving, so as to without using from Clutch, clutch abrasion or sliding wear are reduced, while reduce pause and transition in rhythm or melody sense, improve comfortableness, and reduce oil consumption, reduction is started Machine noise, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.
To sum up, the dynamical system of the hybrid vehicle proposed according to the utility model embodiment, engine pass through clutch Device outputs power to the wheel of hybrid vehicle, and power motor outputs driving force to the wheel of hybrid vehicle, power Battery is powered to power motor, and auxiliary-motor is generated electricity under the drive of engine, and control module obtains the SOC value of electrokinetic cell With the speed of hybrid vehicle, and entered according to the SOC value of electrokinetic cell and the speed of hybrid vehicle control auxiliary-motor Generated output shaping modes, so that engine operates in default optimal economic region, so as to reduce the oil consumption of engine, The economy of vehicle operation is improved, and reduces engine noise, while multiple drive modes can be realized, is able to maintain that vehicle Low speed electric equilibrium and low speed ride comfort, lift vehicle performance.
Embodiment three：
In some embodiments of the utility model, the dynamical system of hybrid vehicle also includes control module 101, During the traveling of hybrid vehicle, control module 101 be used for obtain electrokinetic cell 3 SOC value (State of Charge, State-of-charge, be also dump energy) and hybrid vehicle vehicle velocity V, and according to the SOC value and hybrid power of electrokinetic cell 3 The generated output P1 of the vehicle velocity V control auxiliary-motor 5 of automobile, and the hair according to the generated output P1 of auxiliary-motor 5 acquisition engines 1 Electrical power P 0 is to control engine 1 to operate in default optimal economic region.
It should be noted that the SOC value of electrokinetic cell 3 can be gathered by the battery management system of hybrid vehicle, from And the SOC value of the electrokinetic cell 3 collected is sent to control module 101 by battery management system, so that control module 101 obtains The SOC value of electrokinetic cell 3.
It should be noted that the default optimal economic region that engine's fuel consumption characteristics loop image determines engine 1 can be combined. An example of engine's fuel consumption characteristics loop image is illustrated in figure 7, wherein, side ordinate is the output torque of engine 1, horizontal Coordinate is the rotating speed of engine 1, and curve a is the fuel-economy curve of engine 1.Region corresponding to fuel-economy curve is to send out The optimal economic region of motivation, that is, say when the torque of engine 1 and moment of torsion are located on the fuel-economy curve of engine optimum, Engine is in optimal economic region.Thus, in the utility model embodiment, control module 101 can be by controlling engine 1 Rotating speed and output torque fall in engine fuel economic curve for example on curve a so that engine 1 operate in it is default optimal Economic zone.
Specifically, during hybrid electric vehicle is sailed, engine 1 can be output power to mixed by clutch 6 The wheel 7 of power vehicle is closed, and engine 1 can also drive auxiliary-motor 5 to be generated electricity.Thus, the power output master of engine To include two parts, part output to auxiliary-motor 5, that is, the generated output for driving auxiliary-motor 5 to be generated electricity, another part is defeated Go out to the driving power of wheel 7, i.e. driving moment 7.
When engine 1 drives auxiliary-motor 5 to be generated electricity, control module 101 can obtain the SOC value of electrokinetic cell 3 first With the speed of hybrid vehicle, auxiliary-motor 5 is then controlled according to the SOC value of electrokinetic cell 3 and the speed of hybrid vehicle Generated output P1, and the generated output P0 of engine 1 is obtained to control engine 1 according to the generated output P1 of auxiliary-motor 5 Operate in default optimal economic region.Control module 101 can be before making engine 1 be operated in default optimal economic region The power for determining that engine 1 drives auxiliary-motor 5 to be generated electricity is put, so as to adjust the generated output P1 of auxiliary-motor 5.
Thereby, it is possible to make engine 1 be operated in default optimal economic region, because engine 1 is in default optimal warp Help region oil consumption is minimum, fuel economy highest, so as to reduce the oil consumption of engine 1, reduce the noise of engine 1, carry The economy of high vehicle operation.Auxiliary-motor 5 has higher generated output and generating efficiency when being additionally, since low speed, so as to To meet the power demand run at a low speed, vehicle low speed electric equilibrium can be maintained, vehicle low speed ride comfort is maintained, lifts vehicle Power performance.Wherein, by power battery charging, it can be ensured that the power demand of power motor and high-voltage electrical equipment, and then Ensure that power motor drives vehicle normally travel.
Further, it is used for according to one embodiment of the present utility model, control module 101：As the SOC of electrokinetic cell 3 When value is more than default limiting value M2 and is less than or equal to the first preset value M1, if the vehicle velocity V of hybrid vehicle is less than first Preset vehicle speed V1, the generated output P1 of auxiliary-motor 5 is controlled.
Wherein, the first preset value can be the upper bound limit value of the SOC value of the electrokinetic cell 3 pre-set, for example, stop filling The decision content of electricity, is preferably 30%.Default limiting value can be the lower bound limit value of the SOC value of the electrokinetic cell 3 pre-set, For example, stop the decision content of electric discharge, be preferably 10%.Can be by electrokinetic cell 3 according to the first preset value and default limiting value SOC value be divided into three sections, i.e. the first electricity section, the second electricity section and the 3rd electricity section, when electrokinetic cell 3 When SOC value is less than or equal to default limiting value, the SOC value of electrokinetic cell 3 is in the first electricity section, now electrokinetic cell 3 Only charging is not discharged；When the SOC value of electrokinetic cell 3 is more than default limiting value and is less than or equal to the first preset value, power The SOC value of battery 3 is in the second electricity section, and now electrokinetic cell 3 has charge requirement, you can is actively filled to electrokinetic cell 3 Electricity；When the SOC value of electrokinetic cell 3 is more than the first preset value, the SOC value of electrokinetic cell 3 is in the 3rd electricity section, now moves Power battery 3 can not charge, i.e., actively will not be charged to electrokinetic cell 3.
Specifically, control module 101, can after the SOC value and the speed of hybrid vehicle for obtaining electrokinetic cell 3 Judge the section residing for the SOC value of electrokinetic cell 3, if the SOC value of electrokinetic cell 3 is in middle electricity section, electrokinetic cell 3 SOC value is more than default limiting value and is less than or equal to the first preset value, then explanation can charge to electrokinetic cell 3, now Control module 101 determines whether the speed of hybrid vehicle is less than the first preset vehicle speed, if hybrid vehicle Speed be less than the first preset vehicle speed, then the generated output P1 of auxiliary-motor 5 is controlled, now the speed of hybrid vehicle Relatively low, required driving force is less, and power motor 2 is enough to drive hybrid electric vehicle to sail, and engine 1 can only drive secondary electricity Machine 5 is generated electricity, and is not involved in driving.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
Further, it is additionally operable to according to one embodiment of the present utility model, control module 101：When electrokinetic cell 3 SOC values are more than default limiting value M2 and the vehicle velocity V less than or equal to the first preset value M1 and hybrid vehicle is less than the During one preset vehicle speed V1, the vehicle demand power P2 of hybrid vehicle is obtained, and be less than or equal to pair in vehicle demand power P2 During the maximum allowable generated output Pmax of motor 5, the generated output P1 of auxiliary-motor 5 is controlled.
Specifically, during the traveling of hybrid vehicle, if the SOC value of electrokinetic cell 3 is more than default pole Limit value M2 and vehicle velocity V less than or equal to the first preset value M1 and hybrid vehicle is less than the first preset vehicle speed V1, that is, mix The speed of power vehicle is relatively low, and control module 101 then obtains the vehicle demand power P2 of hybrid vehicle, and in vehicle demand When power P 2 is less than or equal to the maximum allowable generated output Pmax of auxiliary-motor 5, the generated output P1 of auxiliary-motor 5 is controlled.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
Further, according to one embodiment of the present utility model, control module 101 is additionally operable to when electrokinetic cell 3 SOC values are more than default limiting value and the vehicle velocity V less than or equal to the first preset value M1, hybrid vehicle is less than first and preset When vehicle velocity V 1 and vehicle demand power P2 are less than or equal to the maximum allowable generated output Pmax of auxiliary-motor 5, hybrid power vapour is obtained The gas pedal depth D of the car and vehicle resistance F of hybrid vehicle, and be less than or equal to first in gas pedal depth D and preset When the vehicle resistance F of depth D1 and hybrid vehicle is less than or equal to the first default resistance F1, to the generated output P1 of auxiliary-motor 5 It is controlled.
It should be noted that the car resistance that the vehicle resistance of hybrid vehicle can be hybrid vehicle for example rolls Resistance, acceleration resistance, grade resistance and air drag etc..
Specifically, if the SOC value of electrokinetic cell 3 be more than default limiting value and less than or equal to the first preset value M1, The vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed V1 and vehicle demand power P2 permits less than or equal to the maximum of auxiliary-motor 5 Perhaps generated output Pmax, control module 101 then obtain the gas pedal depth D and hybrid vehicle of hybrid vehicle in real time Vehicle resistance F, the vehicle resistance F that the first predetermined depth D1 and hybrid vehicle are less than or equal to as gas pedal depth D is small When equal to the first default resistance F1, control module 101 is controlled to the generated output P1 of auxiliary-motor 5.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
As above, when hybrid vehicle is run at a low speed, engine 1 can only generate electricity and be not involved in driving, due to engine not Driving is participated in, clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving easypro Adaptive, also, engine is operated in economic zone in low speed, due to oil consumption of the engine in default optimal economic region Minimum, fuel economy highest, so as to reduce oil consumption, engine noise is reduced, the economy of vehicle operation is improved, so as to tie up Vehicle low speed electric equilibrium and low speed ride comfort are held, lifts vehicle performance.
According to one embodiment of the present utility model, control module 101 is additionally operable to：When control engine 1 individually drives pair Motor 5 generated electricity and control power motor 2 alone output driving power when, according to below equation obtain engine 1 generating work( Rate：
P0=P1/ η/ζ
Wherein, P0 is the generated output of engine 1, and P1 is the generated output of auxiliary-motor 5, and η Belt Transmission Efficiencies, ζ is pair The efficiency of motor 5.
That is, engine 1 can only generate electricity be not involved in driving in the case of, control module 101 can be according to auxiliary-motor 5 Generated output, the efficiency ζ of Belt Transmission Efficiency η and auxiliary-motor 5 calculates the generated output P0 of engine 1, and controls and start Machine 1 drives auxiliary-motor 5 to be generated electricity with the generated output P0 of acquisition, to control the generated output of auxiliary-motor 5.
Correspondingly, when hybrid vehicle electrokinetic cell 3 SOC value, vehicle velocity V, gas pedal depth D and vehicle resistance When F is unsatisfactory for above-mentioned condition, engine 1 may participate in driving, and its specific work process is as follows.
According to one embodiment of the present utility model, control module 101 is additionally operable to：It is less than in the SOC value of electrokinetic cell 3 pre- If limiting value or the speed of hybrid vehicle be more than or equal to the first preset vehicle speed or vehicle demand power and be more than secondary electricity The maximum allowable generated output or gas pedal depth of machine 5 are more than the vehicle of the first predetermined depth or hybrid vehicle When resistance is more than the first default resistance, control engine 1 participates in driving.
That is, in speed of the SOC value of electrokinetic cell 3 less than default limiting value M2 or hybrid vehicle The maximum allowable generated output or throttle for being more than auxiliary-motor 5 more than or equal to the first preset vehicle speed or vehicle demand power are stepped on When plate depth is more than the vehicle resistance of the first predetermined depth or hybrid vehicle more than the first default resistance, control module 101 control engines 1 participate in driving, and now, electrokinetic cell 3 no longer discharges, the driving force needed for vehicle is larger, vehicle demand work( Rate is larger, gas pedal depth is larger or vehicle resistance is also larger, and power motor 2 is not enough to drive hybrid electric vehicle to sail, Engine 1 participates in driving to carry out supplying driving.
Thus, engine 1 can participate in driving in the driving force deficiency that power motor 2 exports, so that it is guaranteed that vehicle is normal Traveling, the power performance of vehicle is improved, improve the distance travelled of vehicle.
More specifically, control module 101 is additionally operable to：When vehicle demand power is more than the maximum allowable generating work(of auxiliary-motor 5 During rate, engine 1 is also controlled to participate in driving so that engine 1 outputs power to wheel by clutch 6.
Also, control module 101 is additionally operable to：When the SOC value of electrokinetic cell 3 is less than default limiting value M2, control hair Motivation 1 participates in driving so that engine 1 outputs driving force to wheel 7 by clutch 6；When the SOC values of electrokinetic cell 3 are less than Vehicle velocity V equal to the first preset value M1, hybrid vehicle is less than the first preset vehicle speed V1 and gas pedal depth D and is more than the During one predetermined depth D1, control module 101 controls engine 1 to participate in driving so that engine 1 is outputed power by clutch 6 To wheel 7；When the SOC value of electrokinetic cell 3 is pre- less than first less than or equal to the vehicle velocity V of the first preset value M1, hybrid vehicle If the resistance F of vehicle velocity V 1 and hybrid vehicle is more than the first default resistance F1, control module 101 controls engine 1 to participate in Driving is so that engine 1 outputs power to wheel 7 by clutch 6.
Specifically, generated electricity in the drive auxiliary-motor 5 of engine 1 and power motor 2 outputs driving force to hybrid power During the wheel 7 of automobile, control module 101 obtains the SOC value of electrokinetic cell 3, the gas pedal depth of hybrid vehicle in real time D, vehicle velocity V and vehicle resistance F, and SOC value to electrokinetic cell 3, the gas pedal depth D of hybrid vehicle, vehicle velocity V and whole Car resistance F is judged.
First, when the SOC value of electrokinetic cell 3 is less than default limiting value M2, control module 101 controls engine 1 logical Cross clutch 6 and output power to wheel 7, so that engine 1 and power motor 2 simultaneously participate in driving, reduce power motor 2 Load is to reduce the power consumption of electrokinetic cell 3, so as to ensure that engine 1 is operated in default optimal economic region, simultaneously Avoid the SOC value rapid decrease of electrokinetic cell 3.
Second, when the SOC value of electrokinetic cell 3 is less than or equal to the first preset value M1, the vehicle velocity V of hybrid vehicle is less than the One preset vehicle speed V1 and when gas pedal depth D is more than the first predetermined depth D1, control module 101 control engine 1 by from Clutch 6 outputs power to wheel 7, so that engine 1 and power motor 2 simultaneously participate in driving, reduces the load of power motor 2 To reduce the power consumption of electrokinetic cell 3, so as to ensure that engine 1 is operated in default optimal economic region, avoid simultaneously The SOC value rapid decrease of electrokinetic cell 3.
Third, when the SOC value of electrokinetic cell 3 is less than or equal to the first preset value M1, the vehicle velocity V of hybrid vehicle is less than the When the resistance F of one preset vehicle speed V1 and hybrid vehicle is more than the first default resistance F1, control module 101 controls engine 1 Wheel 7 is output power to by clutch 6, so that engine 1 and power motor 2 simultaneously participate in driving, reduces power motor 2 Load to reduce the power consumption of electrokinetic cell 3, so as to ensure that engine 1 is operated in default optimal economic region, together When avoid the SOC value rapid decrease of electrokinetic cell 3.
Thus, engine 1 can participate in driving in the driving force deficiency that power motor 2 exports, so that it is guaranteed that vehicle is normal Traveling, the power performance of vehicle is improved, improve the distance travelled of vehicle.Also, controllable engine is operated in economic zone Domain, because oil consumption of the engine 1 in default optimal economic region is minimum, fuel economy highest, so as to reduce oil consumption, drop Low engine noise, improve vehicle economic performance.
In addition, control module 101 is additionally operable to：When the SOC value of electrokinetic cell 3 is less than or equal to default limiting value, and mixing When the speed of power vehicle is more than the first preset vehicle speed, control engine 1 will participate in driving so that engine 1 will by clutch 6 Power output is to wheel 7.
Thus, engine 1 can participate in driving in the driving force deficiency that power motor 2 exports, so that it is guaranteed that vehicle is normal Traveling, the power performance of vehicle is improved, improve the distance travelled of vehicle.
However, it is to be understood that control module 101 is additionally operable to：When the SOC value of electrokinetic cell 3 is more than the first preset value When, engine 1 does not drive auxiliary-motor 5 to be generated electricity, and now the electricity of electrokinetic cell 3 is close to full electricity, without charging, engine 1 Auxiliary-motor 5 is not driven to be generated electricity.That is, when the electricity of electrokinetic cell 3 is close full electric, engine 1 does not drive secondary electricity Machine 5 is generated electricity, so as to which auxiliary-motor 5 does not charge to electrokinetic cell 3.
Furthermore, after auxiliary-motor 5 enters generated output shaping modes, control module 101 can be to the hair of auxiliary-motor 5 Electrical power is controlled, and the generated output control process of the control module 101 of the utility model embodiment is carried out specifically below Description.
According to one embodiment of the present utility model, control module 101 is additionally operable to：According to the vehicle need of hybrid vehicle The charge power P3 of power P 2 and electrokinetic cell 3 is asked to be controlled the generated output P1 of auxiliary-motor 5.
According to one embodiment of the present utility model, according to the vehicle demand power P2 and electrokinetic cell of hybrid vehicle Charge power P3 control auxiliary-motor 5 generated output P1 formula it is as follows：
P1=P2+P3, wherein, P2=P11+P21,
P1 is the generated output of auxiliary-motor 5, and P2 is vehicle demand power, and P3 is the charge power of electrokinetic cell 3, and P11 is Vehicle driving power, P21 are electric equipment power.
It should be noted that electric equipment includes the first electric equipment 10 and the second electric equipment 30, i.e. electric equipment work( Rate P21 may include high-voltage electrical equipment and the power needed for low voltage equipment.
It should be noted that vehicle driving power P11 may include that the output power module 101 of power motor 2 can root Vehicle driving power P11 is obtained according to the rotating speed of the default throttle-torque curve and power motor 2 of power motor 2, wherein, in advance If throttle-torque curve can be determined when hybrid electric vehicle power matches.In addition, control module 101 can be according to vehicle The electric equipment of operation obtains electric equipment power P 21 in real time, such as calculates electric equipment power by DC consumption in bus P21.In addition, control module 101 can obtain the charge power P3 of electrokinetic cell 3 according to the SOC value of electrokinetic cell 3.Assuming that in real time The vehicle driving power P11=b1kw of acquisition, electric equipment power P 21=b2kw, the charge power P3=of electrokinetic cell 3 B3kw, then auxiliary-motor 5 generated output=b1+b2+b3.
Specifically, during hybrid electric vehicle is sailed, control module 101 can obtain the charging work(of electrokinetic cell 3 Rate P3, vehicle driving power P11 and electric equipment power P 21, and by the charge power P3 of electrokinetic cell 3, vehicle driving power The generated output P1 of P11 and the sum of electric equipment power P 21 as auxiliary-motor 5, thus, control module 101 can be according to calculating P1 values the generated output of auxiliary-motor 5 is controlled, such as control module 101 can be according to the P1 values calculated to engine 1 Output torque and rotating speed be controlled, to drive the power that is generated electricity of auxiliary-motor 5 to be controlled in engine 1.
Further, it is additionally operable to according to one embodiment of the present utility model, control module 101：Obtain electrokinetic cell 3 SOC value rate of change, and according to vehicle demand power P2 minimum output powers corresponding with the optimal economic region of engine 1 The generated output P1 of the SOC value rate of change control auxiliary-motor 5 of relation and electrokinetic cell between Pmin.
Specifically, the optimal economic region of engine can be determined according to the universal characteristic curve of engine shown in Fig. 7, is entered And obtain minimum output power Pmin corresponding to the optimal economic region of engine, control module 101 it is determined that engine most After minimum output power Pmin corresponding to good economic zone, you can according to vehicle demand power P2 and the optimal warp of engine 1 The SOC value rate of change control auxiliary-motor 5 of relation and electrokinetic cell 3 between minimum output power Pmin corresponding to Ji region Generated output.
Thus, when hybrid vehicle is run at a low speed, engine is operated in economic zone, oil consumption can be reduced, reduce Engine noise, the economic performance of vehicle is improved, also, in low speed, engine 1 only generating can be not involved in driving, due to starting Machine is not involved in driving, and clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving Comfortableness, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.
It is described further below, control module 101 is according to the optimal economic region pair of vehicle demand power P2 and engine 1 The generating work(of the SOC value rate of change control auxiliary-motor 5 of relation and electrokinetic cell 3 between the minimum output power Pmin answered The specific regulative mode of rate.
Specifically, generated electricity in the drive auxiliary-motor 5 of engine 1 and power motor 2 outputs driving force to hybrid power During the wheel 7 of automobile, vehicle driving power P11 and electric equipment power P 21 are obtained in real time, to obtain the whole of hybrid vehicle Car demand power P2, control module 101 judged the vehicle demand power P2 of hybrid vehicle, wherein, vehicle demand Power P 2 can meet following three kinds of situations.
The first situation is：Vehicle demand power P2 is less than minimum output work corresponding to the optimal economic region of engine 1 Rate Pmin；Second of situation be：Vehicle demand power P2 is more than or equal to minimum output corresponding to the optimal economic region of engine Power P min and the maximum allowable generated output Pmax for being less than or equal to auxiliary-motor 5；The third situation is：Vehicle demand power P2 More than the maximum allowable generated output Pmax of auxiliary-motor 5.
In one embodiment of the first situation, when vehicle demand power P2 is less than the optimal economic region of engine 1 During corresponding minimum output power Pmin, control module 101 obtains electrokinetic cell according to the SOC value rate of change of electrokinetic cell 3 3 charge power P3, and judge whether the charge power P3 of electrokinetic cell 3 is less than minimum output power Pmin and vehicle demand The difference of power P 2, wherein, if the charge power P3 of electrokinetic cell 3 is less than minimum output power Pmin and vehicle demand power P2 difference, then engine 1 is controlled to be generated electricity with minimum output power Pmin to control the generated output P1 of auxiliary-motor 5；Such as The charge power P3 of fruit electrokinetic cell 3 is more than or equal to minimum output power Pmin and vehicle demand power P2 difference, then basis Charge power P3 and vehicle demand power the P2 sum of electrokinetic cell 3 obtain engine 1 in default optimal economic region Power output, and the power output for controlling engine to obtain is generated electricity to control the generated output P1 of auxiliary-motor 5.
It should be noted that the SOC value rate of change for the electrokinetic cell 3 that can be prestored in control module 101 and electrokinetic cell 3 The first relation table between charge power P3, thus, control module 101 obtain electrokinetic cell 3 SOC value rate of change it Afterwards, the charge power P3 of corresponding electrokinetic cell 3 can be obtained by comparing the first relation table.The SOC values of electrokinetic cell 3 become The charge power P3 of change speed and electrokinetic cell 3 meets the relation shown in table 1 below.
Table 1
The SOC value rate of change of electrokinetic cell 3 A1 A2 A3 A4 A5
The charge power P3 of electrokinetic cell 3 B1 B2 B3 B4 B5
As known to table 1, when the SOC value rate of change that control module 101 is got is A1, the corresponding power that gets The charge power P3 of battery 3 is B1；When the SOC value rate of change that control module 101 is got is A2, what is got is corresponding The charge power P3 of electrokinetic cell 3 is B2；When the SOC value rate of change that control module 101 is got is A3, get The charge power P3 of corresponding electrokinetic cell 3 is B3；When the SOC value changes speed that control module 101 is got is A4, obtain The charge power P3 for the corresponding electrokinetic cell 3 got is B4；When the SOC value rate of change that control module 101 is got is A5 When, the charge power P3 of the corresponding electrokinetic cell 3 got is B5.
Specifically, when carrying out generated output control to auxiliary-motor 5, vehicle driving power P11 and electrical equipment are obtained in real time Plant capacity P21, to obtain the vehicle demand power P2 of hybrid vehicle, and to the vehicle demand power of hybrid vehicle P2 is judged.When vehicle demand power P2 is less than minimum output power Pmin corresponding to the optimal economic region of engine 1 When, the charge power P3 of electrokinetic cell 3 can be obtained according to the SOC value rate of change of electrokinetic cell 3, and judge electrokinetic cell 3 Whether charge power P3 is less than or equal to minimum output power Pmin and vehicle demand power P2 difference.
When vehicle demand power P2 is less than minimum output power Pmin corresponding to the optimal economic region of engine 1, such as The charge power P3 of fruit electrokinetic cell 3 is less than minimum output power Pmin and vehicle demand power P2 difference, i.e. P3 ＜ Pmin-P2, then by controlling engine 1 to be generated electricity with minimum output power Pmin to control the generated output of auxiliary-motor 1； If the charge power P3 of electrokinetic cell 3 is more than or equal to minimum output power Pmin and vehicle demand power P2 difference, i.e. P3 >=Pmin-P2, then engine 1 is obtained default according to the charge power P3 of electrokinetic cell 3 and vehicle demand power P2 sums Power output in optimal economic region, and it is secondary electric to control by controlling engine 1 to be generated electricity with the power output of acquisition The generated output of machine 5.
Thus, when vehicle demand power P2 is less than minimum output power Pmin corresponding to the optimal economic region of engine 1 When, according to the charge power P3 of electrokinetic cell 3 minimum output power Pmins corresponding with the optimal economic region of engine 1 with it is whole The generated output of the Relation acquisition engine 1 of car demand power P2 difference, so that engine 1 operates in default optimal economic area Domain, and engine 1 is only generated electricity and is not involved in driving, and so as to reduce the oil consumption of engine, and reduces making an uproar for engine Sound.
In one embodiment of second of situation, when vehicle demand power P2 is more than or equal to the optimal economic area of engine Minimum output power Pmin corresponding to domain and less than or equal to auxiliary-motor 5 maximum allowable generated output Pmax when, control module 101 The charge power P3 of electrokinetic cell 3 is obtained according to the SOC value rate of change of electrokinetic cell 3, and according to the charging work(of electrokinetic cell 3 Rate P3 obtains power output of the engine 1 in default optimal economic region with vehicle demand power P2 sums, and passes through Control engine 1 is generated electricity with the power output of acquisition to control the generated output P1 of auxiliary-motor 5.
Specifically, when vehicle demand power P2 is more than or equal to minimum output corresponding to the optimal economic region of engine 1 Power P min and less than auxiliary-motor 5 maximum allowable generated output Pmax when, control module 101 control engine 1 be operated in SOC value rate of change during default optimal economic region always according to electrokinetic cell 3 obtains the charge power P3 of electrokinetic cell 3, And engine 1 is obtained in default optimal economic area according to charge power P3 and vehicle demand power the P2 sum of electrokinetic cell 3 Power output in domain, wherein, power output=P3+P2 of acquisition.And then control module 101 controls engine 1 to obtain Power output generated electricity to control the generated output P1 of auxiliary-motor 5 so that the SOC value increase of electrokinetic cell 3, and makes hair Motivation 1 is operated in default optimal economic region.
Thus, when vehicle demand power P2 is more than or equal to minimum output power corresponding to the optimal economic region of engine 1 Pmin and less than auxiliary-motor 5 maximum allowable generated output Pmax when, according to the charge power P3 of electrokinetic cell 3 and vehicle need Ask the sum of power P 2 to obtain the power output of engine 1, so that engine 1 operates in default optimal economic region, and start Machine 1 is only generated electricity and is not involved in driving, and so as to reduce the oil consumption of engine, and reduces the noise of engine.
In one embodiment of the third situation, when vehicle demand power P2 is more than the maximum allowable generating of auxiliary-motor 5 During power P max, control module 101 also controls engine 1 to participate in driving so that engine 1 is outputed power by clutch 6 To wheel 7.
Specifically, when the vehicle demand power P2 maximum allowable generated output Pmax for being more than auxiliary-motor 5 are hybrid power The vehicle demand power P2 of automobile be higher than auxiliary-motor 5 generated output P1 when, control module 101 also control engine 1 by from Clutch 6 outputs driving force to wheel 7 so that engine 1 participates in driving, so as to by engine 1 undertake part driving power P ＇, To reduce the demand to the generated output P1 of auxiliary-motor 5, engine 1 is set to be operated in default optimal economic region.
Thus, when vehicle demand power P2 is more than the maximum allowable generated output Pmax of auxiliary-motor 5, electrokinetic cell 3 is right Outer electric discharge to power motor 2 to power, and now, control module 101 controls power motor 2 to output power to hybrid vehicle Wheel 7 so that engine 1 is operated in default optimal economic region.
Thus, in low speed, engine can be operated in economic zone, and only generate electricity and be not involved in driving, so as to without using from Clutch, clutch abrasion or sliding wear are reduced, while reduce pause and transition in rhythm or melody sense, improve comfortableness, and reduce oil consumption, reduction is started Machine noise, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.
To sum up, the dynamical system of the hybrid vehicle proposed according to the utility model embodiment, engine pass through clutch Device outputs power to the wheel of hybrid vehicle, and power motor outputs driving force to the wheel of hybrid vehicle, power Battery is powered to power motor, and auxiliary-motor is generated electricity under the drive of engine, and control module obtains the SOC value of electrokinetic cell With the speed of hybrid vehicle, and entered according to the SOC value of electrokinetic cell and the speed of hybrid vehicle control auxiliary-motor Generated output shaping modes, so that engine operates in default optimal economic region, so as to reduce the oil consumption of engine, The economy of vehicle operation is improved, and reduces engine noise, while multiple drive modes can be realized, is able to maintain that vehicle Low speed electric equilibrium and low speed ride comfort, lift vehicle performance.
Example IV：
In some embodiments of the utility model, control module 101 is used for the SOC value (State for obtaining electrokinetic cell 3 Of Charge, state-of-charge, are also dump energy), the speed of the SOC value of low tension battery 20 and hybrid vehicle, and root Enter generated output shaping modes according to the SOC value of electrokinetic cell 3 and the speed control auxiliary-motor 5 of hybrid vehicle, so that hair Motivation 1 operates in default optimal economic region, wherein, after auxiliary-motor 5 enters generated output shaping modes, control module 101 are additionally operable to that the generated output of auxiliary-motor 5 is adjusted according to the SOC value of low tension battery 20.Wherein, generated output is adjusted Pattern is the pattern that the generated output of engine is adjusted, can be by controlling engine 1 in generated output shaping modes Drive auxiliary-motor 5 to be generated electricity to be adjusted with the generated output to auxiliary-motor 5.
It should be noted that the SOC value of electrokinetic cell 3 and low can be gathered by the battery management system of hybrid vehicle The SOC value of battery 20 is pressed, so as to which battery management system is by the SOC value of the electrokinetic cell 3 collected and low tension battery 20 SOC value is sent to control module 101, so that control module 101 obtains the SOC value and low tension battery 20 of electrokinetic cell 3 SOC value.
It should be noted that the default optimal economic region that engine's fuel consumption characteristics loop image determines engine 1 can be combined. An example of engine's fuel consumption characteristics loop image is illustrated in figure 7, wherein, side ordinate is the output torque of engine 1, horizontal Coordinate is the rotating speed of engine 1, and curve a is the fuel-economy curve of engine 1.Region corresponding to fuel-economy curve is to send out The optimal economic region of motivation, that is, say when the torque of engine 1 and moment of torsion are located on the fuel-economy curve of engine optimum, Engine is in optimal economic region.Thus, in the utility model embodiment, control module 101 can be by controlling engine 1 Rotating speed and output torque fall in engine fuel economic curve for example on curve a so that engine 1 operate in it is default optimal Economic zone.
Specifically, during hybrid electric vehicle is sailed, engine 1 can be output power to mixed by clutch 6 The wheel 7 of power vehicle is closed, and engine 1 can also drive auxiliary-motor 5 to be generated electricity.Thus, the power output master of engine To include two parts, part output to auxiliary-motor 5, that is, the generated output for driving auxiliary-motor 5 to be generated electricity, another part is defeated Go out to the driving power of wheel 7, i.e. driving moment 7.
When engine 1 drives auxiliary-motor 5 to be generated electricity, control module 101 can obtain the SOC value of electrokinetic cell 3 first With the speed of hybrid vehicle, auxiliary-motor 5 is then controlled according to the SOC value of electrokinetic cell 3 and the speed of hybrid vehicle Into generated output shaping modes, so that engine 1 is operated in default optimal economic region.In generated output shaping modes, Control module 101 can adjust the generating work(of auxiliary-motor 5 on the premise of engine 1 is operated in default optimal economic region Rate.Wherein, after auxiliary-motor 5 enters generated output shaping modes, SOC value of the control module 101 always according to low tension battery 20 Further adjust the generated output of auxiliary-motor 5.
Thereby, it is possible to make engine 1 be operated in default optimal economic region, because engine 1 is in default optimal warp Help region oil consumption is minimum, fuel economy highest, so as to reduce the oil consumption of engine 1, reduce the noise of engine 1, carry The economy of high vehicle operation.Auxiliary-motor 5 has higher generated output and generating efficiency when being additionally, since low speed, so as to To meet the power demand run at a low speed, vehicle low speed electric equilibrium can be maintained, vehicle low speed ride comfort is maintained, lifts vehicle Power performance.Wherein, by power battery charging, it can be ensured that the power demand of power motor and high-voltage electrical equipment, and then Ensure that power motor drives vehicle normally travel, also, by being charged to low tension battery, it can be ensured that the use of low voltage equipment Electric demand, and vehicle can be realized by low tension battery when auxiliary-motor stops generating and electrokinetic cell failure or not enough power supply Low-voltage power supply, and then ensure that vehicle can realize pure fuel oil pattern traveling, improve vehicle distance travelled.
Further, it is used for according to one embodiment of the present utility model, control module 101：As the SOC of electrokinetic cell 3 When value is more than default limiting value and is less than or equal to the first preset value, if the speed of hybrid vehicle is less than the first default car Speed, control auxiliary-motor 5 enter generated output shaping modes.
Wherein, the first preset value can be the upper bound limit value of the SOC value of the electrokinetic cell 3 pre-set, for example, stop filling The decision content of electricity, is preferably 30%.Default limiting value can be the lower bound limit value of the SOC value of the electrokinetic cell 3 pre-set, For example, stop the decision content of electric discharge, be preferably 10%.Can be by electrokinetic cell according to the first preset value and default limiting value 3 SOC value is divided into three sections, i.e. the first electricity section, the second electricity section and the 3rd electricity section, when electrokinetic cell 3 When SOC value is less than or equal to default limiting value, the SOC value of electrokinetic cell 3 is in the first electricity section, now electrokinetic cell 3 Only charging is not discharged；When the SOC value of electrokinetic cell 3 is more than default limiting value and is less than or equal to the first preset value, power The SOC value of battery 3 is in the second electricity section, and now electrokinetic cell 3 has charge requirement, you can is actively filled to electrokinetic cell 3 Electricity；When the SOC value of electrokinetic cell 3 is more than the first preset value, the SOC value of electrokinetic cell 3 is in the 3rd electricity section, now moves Power battery 3 can not charge, i.e., actively will not be charged to electrokinetic cell 3.
Specifically, control module 101, can after the SOC value and the speed of hybrid vehicle for obtaining electrokinetic cell 3 The section residing for the SOC value of electrokinetic cell 3 is judged, if the SOC value of electrokinetic cell 3 is in the second electricity section, electrokinetic cell 3 SOC value be more than and default limiting value and be less than or equal to the first preset value, then illustrate to charge to electrokinetic cell 3, this When control module 101 determine whether the speed of hybrid vehicle is less than the first preset vehicle speed, if hybrid power vapour The speed of car is less than the first preset vehicle speed, then controls auxiliary-motor 5 to enter generated output shaping modes, now hybrid vehicle Speed is relatively low, and required driving force is less, and power motor 2 is enough to drive hybrid electric vehicle to sail, and engine 1 can only drive secondary Motor 5 is generated electricity, and is not involved in driving.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
Further, control module 101 is additionally operable to：When electrokinetic cell 3 SOC value be more than default limiting value and less than etc. When the speed of the first preset value and hybrid vehicle is less than the first preset vehicle speed, the vehicle of hybrid vehicle is obtained Demand power, and when vehicle demand power is less than or equal to the maximum allowable generated output of auxiliary-motor 5, control auxiliary-motor 5 enters Generated output shaping modes.
That is, it is more than default limiting value in the SOC value for judging electrokinetic cell 3 and is preset less than or equal to first Value, and the speed of hybrid vehicle is less than after the first preset vehicle speed, control module 101 can also determine whether that vehicle needs Ask whether power is more than the maximum allowable generated output of auxiliary-motor 5, if vehicle demand power is less than or equal to the maximum of auxiliary-motor 5 Allow generated output, then control auxiliary-motor 5 to enter generated output shaping modes, now, the driving force needed for vehicle is less, and whole Car demand power is smaller, and power motor 2 is enough to drive hybrid electric vehicle to sail, and engine 1 only can drive auxiliary-motor 5 to carry out Generate electricity, be not involved in driving.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
Further, control module 101 is additionally operable to：When the SOC value of electrokinetic cell is more than default limiting value and is less than Speed equal to the first preset value, hybrid vehicle is less than the first preset vehicle speed and vehicle demand power is less than or equal to secondary electricity During the maximum allowable generated output of machine, the gas pedal depth of hybrid vehicle and the vehicle resistance of hybrid vehicle are obtained Power, and it is pre- less than or equal to first less than or equal to the vehicle resistance of the first predetermined depth and hybrid vehicle in gas pedal depth During handicapping power, control auxiliary-motor enters generated output shaping modes.
It should be noted that the car resistance that the vehicle resistance of hybrid vehicle can be hybrid vehicle for example rolls Resistance, acceleration resistance, grade resistance and air drag etc..
That is, it is more than default limiting value in the SOC value for judging electrokinetic cell 3 and is preset less than or equal to first Value, and the speed of hybrid vehicle is less than the first preset vehicle speed, and vehicle demand power is permitted less than or equal to the maximum of auxiliary-motor 5 Perhaps after generated output, control module 101 can also determine whether gas pedal depth whether be more than the first predetermined depth and Whether the vehicle resistance of hybrid vehicle is more than the first default resistance, is preset deeply if gas pedal depth is less than or equal to first The vehicle resistance of degree or hybrid vehicle is less than or equal to the first default resistance, then controls auxiliary-motor 5 to enter generated output and adjust Section pattern, now, the driving force needed for vehicle are less, and vehicle demand power is smaller, and gas pedal depth is smaller, vehicle resistance Also smaller, power motor 2 is enough to drive hybrid electric vehicle to sail, and engine 1 only can drive auxiliary-motor 5 to be generated electricity, and not join With driving.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
As above, when hybrid vehicle is run at a low speed, engine 1 can only generate electricity and be not involved in driving, due to engine not Driving is participated in, clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving easypro Adaptive, also, engine is operated in economic zone in low speed, due to oil consumption of the engine in default optimal economic region Minimum, fuel economy highest, so as to reduce oil consumption, engine noise is reduced, the economy of vehicle operation is improved, so as to tie up Vehicle low speed electric equilibrium and low speed ride comfort are held, lifts vehicle performance.
In addition, according to one embodiment of the present utility model, control module 101 is additionally operable to：In the SOC value of electrokinetic cell 3 It is more than or equal to the first preset vehicle speed less than default limiting value or the speed of hybrid vehicle or vehicle demand power is big It is more than the first predetermined depth or hybrid vehicle in the maximum allowable generated output or gas pedal depth of auxiliary-motor 5 Vehicle resistance when being more than the first default resistance, control engine 1 participates in driving.
That is, in speed of the SOC value of electrokinetic cell 3 less than default limiting value M2 or hybrid vehicle The maximum allowable generated output or throttle for being more than auxiliary-motor 5 more than or equal to the first preset vehicle speed or vehicle demand power are stepped on When plate depth is more than the vehicle resistance of the first predetermined depth or hybrid vehicle more than the first default resistance, control module 101 control engines 1 participate in driving, and now, electrokinetic cell 3 no longer discharges, the driving force needed for vehicle is larger, vehicle demand work( Rate is larger, gas pedal depth is larger or vehicle resistance is also larger, and power motor 2 is not enough to drive hybrid electric vehicle to sail, Engine 1 participates in driving to carry out supplying driving.
Thus, engine 1 can participate in driving in the driving force deficiency that power motor 2 exports, so that it is guaranteed that vehicle is normal Traveling, the power performance of vehicle is improved, improve the distance travelled of vehicle.
More specifically, control module 101 is additionally operable to：When vehicle demand power is more than the maximum allowable generating work(of auxiliary-motor 5 During rate, engine 1 is also controlled to participate in driving so that engine 1 outputs power to wheel by clutch 6.
Also, control module 101 is additionally operable to：When the SOC value of electrokinetic cell 3 is less than or equal to default limiting value, control Engine 1 participates in driving so that engine 1 outputs power to wheel by clutch 6；When the SOC value of electrokinetic cell 3 is less than Speed equal to the first preset value, hybrid vehicle is less than the first preset vehicle speed and gas pedal depth is more than first and preset deeply When spending, control engine 1 participates in driving so that engine 1 outputs power to wheel by clutch 6；When electrokinetic cell 3 SOC value is less than or equal to the first preset value, the speed of hybrid vehicle is less than the whole of the first preset vehicle speed and hybrid vehicle When car resistance is more than the first default resistance, engine 1 participates in driving so that engine 1 outputs power to car by clutch 6 Wheel.
That is, control module 101 can obtain the SOC value of electrokinetic cell 3, the gas pedal of hybrid vehicle in real time Depth, speed, vehicle resistance and vehicle demand power, and SOC value to electrokinetic cell 3, the throttle of hybrid vehicle are stepped on Plate depth, speed and vehicle resistance are judged：
First, when the SOC value of electrokinetic cell 3 is less than default limiting value, because of the low battery of electrokinetic cell 3, power Battery 3 can not provide enough electric energy, and control module 101 controls engine 1 and power motor 2 to simultaneously participate in driving, this time control The also controllable engine 1 of molding block 101 drives auxiliary-motor 5 to be generated electricity, and the generated output by adjusting auxiliary-motor 5 can make Engine 1 is operated in default optimal economic region.
Second, when the SOC value of electrokinetic cell 3 is less than or equal to the first preset value, the speed of hybrid vehicle is less than first Preset vehicle speed and when gas pedal depth is more than the first predetermined depth, because gas pedal depth is deeper, the control hair of control module 101 Motivation 1 and power motor 2 simultaneously participate in driving, and now the also controllable engine 1 of control module 101 drives auxiliary-motor 5 to be sent out Electricity, and by adjusting the generated output of auxiliary-motor 5 engine 1 can be made to be operated in default optimal economic region.
Third, when the SOC value of electrokinetic cell 3 is less than or equal to the first preset value, the speed of hybrid vehicle is less than first When the vehicle resistance of preset vehicle speed and hybrid vehicle is more than the first default resistance, because vehicle resistance is larger, control module 101 Control engine 1 and power motor 2 simultaneously participate in driving, and now the also controllable engine 1 of control module 101 drives auxiliary-motor 5 Generated electricity, and by adjusting the generated output of auxiliary-motor 5 engine 1 can be made to be operated in default optimal economic region.
Thus, engine 1 can participate in driving in the driving force deficiency that power motor 2 exports, so that it is guaranteed that vehicle is normal Traveling, the power performance of vehicle is improved, improve the distance travelled of vehicle.Also, controllable engine is operated in economic zone Domain, because oil consumption of the engine 1 in default optimal economic region is minimum, fuel economy highest, so as to reduce oil consumption, drop Low engine noise, improve vehicle economic performance.
In addition, control module 101 is additionally operable to：When the SOC value of electrokinetic cell 3 is less than or equal to default limiting value, and mixing When the speed of power vehicle is more than the first preset vehicle speed, control engine 1 will participate in driving so that engine 1 will by clutch 6 Power output is to wheel 7.
Thus, engine 1 can participate in driving in the driving force deficiency that power motor 2 exports, so that it is guaranteed that vehicle is normal Traveling, the power performance of vehicle is improved, improve the distance travelled of vehicle.
However, it is to be understood that control module 101 is additionally operable to：When the SOC value of electrokinetic cell 3 is more than the first preset value When, engine 1 does not drive auxiliary-motor 5 to be generated electricity, and now the electricity of electrokinetic cell 3 is close to full electricity, without charging, engine 1 Auxiliary-motor 5 is not driven to be generated electricity.That is, when the electricity of electrokinetic cell 3 is close full electric, engine 1 does not drive secondary electricity Machine 5 is generated electricity, so as to which auxiliary-motor 5 does not charge to electrokinetic cell 3.
Furthermore, after auxiliary-motor 5 enters generated output shaping modes, control module 101 can be to the hair of auxiliary-motor 5 Electrical power is adjusted, and the generated output regulation process of the control module 101 of the utility model embodiment is carried out specifically below Description.
According to one embodiment of the present utility model, control module 101 is additionally operable to：Adjusted when auxiliary-motor 5 enters generated output After section pattern, according to the vehicle demand power, the charge power of electrokinetic cell 3 and filling for low tension battery 20 of hybrid vehicle The generated output of auxiliary-motor 5 is adjusted for electrical power, the SOC value of low tension battery 20.
Specifically, according to the vehicle demand power of hybrid vehicle, the charge power and low tension battery of electrokinetic cell 3 The formula of the generated output of 20 charge power regulation auxiliary-motor 5 can be as follows：
P1=P2+P3+P4, wherein, P2=P11+P21,
Wherein, P1 is the generated output of auxiliary-motor 5, and P2 is vehicle demand power, and P3 is the charge power of electrokinetic cell 3, P4 is the charge power of low tension battery 20, and P11 is vehicle driving power, and P21 is electric equipment power.
It should be noted that electric equipment includes the first electric equipment 10 and the second electric equipment 30, i.e. electric equipment work( Rate P21 may include high-voltage electrical equipment and the power needed for low voltage equipment.
It should be noted that vehicle driving power P11 may include the power output of power motor 2, control module 101 can root Vehicle driving power P11 is obtained according to the rotating speed of the default throttle-torque curve and power motor 2 of power motor 2, wherein, in advance If throttle-torque curve can be determined when hybrid electric vehicle power matches；What control module 101 can be run according to vehicle Electric equipment obtains electric equipment power P 21 in real time, such as calculates electric equipment power P 21 by DC consumption in bus；Control Molding block 101 can obtain the charge power P3 of electrokinetic cell 3 according to the SOC value of electrokinetic cell 3, and according to low tension battery 20 SOC value obtains the charge power P4 of low tension battery 20.
Specifically, during hybrid electric vehicle is sailed, control module 101 can obtain the charging work(of electrokinetic cell 3 Rate P3, the charge power P4 of low tension battery 20, vehicle driving power P11 and electric equipment power P 21, and by electrokinetic cell 3 charge power P3, the charge power P4 of low tension battery 20, vehicle driving power P11 and the sum of electric equipment power P 21 As the generated output P1 of auxiliary-motor 5, thus, control module 101 can be according to generating work(of the P1 values calculated to auxiliary-motor 5 Rate is adjusted, such as control module 101 can be controlled according to the P1 values calculated to the output torque and rotating speed of engine 1 System, it is adjusted with the power for driving auxiliary-motor 5 to be generated electricity in engine 1.
Further, it is additionally operable to according to one embodiment of the present utility model, control module 101：Obtain electrokinetic cell 3 SOC value rate of change, and according to vehicle demand power P2 minimum output powers corresponding with the optimal economic region of engine 1 Relation and the SOC value rate of change of electrokinetic cell 3, the SOC value of low tension battery 20, low tension battery 20 between Pmin SOC value rate of change adjusts the generated output of auxiliary-motor 5.
It should be appreciated that the SOC value that control module 101 can obtain electrokinetic cell 3 according to the SOC value of electrokinetic cell 3 becomes Change speed, for example, each time interval t gathers the SOC value of an electrokinetic cell 3, so can be by the current SOC of electrokinetic cell 3 Value and the difference of previous SOC value and SOC value rate of change of the time interval t ratio as electrokinetic cell 3.Similarly, can basis The SOC value of low tension battery 20 obtains the SOC value rate of change of low tension battery 20, for example, each time interval t collections are once The SOC value of low tension battery 20, so can be by the difference of the current SOC value of low tension battery 20 and previous SOC value and time interval t SOC value rate of change of the ratio as low tension battery 20.
Specifically, the optimal economic region of engine can be determined according to the universal characteristic curve of engine shown in Fig. 7, is entered And obtain minimum output power Pmin corresponding to the optimal economic region of engine, control module 101 it is determined that engine most After minimum output power Pmin corresponding to good economic zone, you can according to vehicle demand power P2 and the optimal warp of engine 1 SOC value rate of change, the low tension battery of relation and electrokinetic cell 3 between minimum output power Pmin corresponding to Ji region The generated output of 20 SOC value, the SOC value rate of change regulation auxiliary-motor 5 of low tension battery 20.
Thus, when hybrid vehicle is run at a low speed, engine is operated in economic zone, oil consumption can be reduced, reduce Engine noise, the economic performance of vehicle is improved, also, in low speed, engine 1 only generating can be not involved in driving, due to starting Machine is not involved in driving, and clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving Comfortableness, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.
It is described further below after auxiliary-motor 5 enters generated output shaping modes, control module 101 is according to vehicle demand Relation and electrokinetic cell 3 between the minimum output power Pmin corresponding with the optimal economic region of engine 1 of power P 2 SOC value rate of change, the SOC value of low tension battery 20, the SOC value rate of change of low tension battery 20 adjust the hair of auxiliary-motor 5 The specific regulative mode of electrical power.
Specifically, control module 101 is additionally operable to：When the SOC value of low tension battery 20 is more than default low battery threshold value, The charge power P3 of electrokinetic cell 3 is obtained according to the SOC value rate of change of electrokinetic cell 3, and judges the charging work(of electrokinetic cell 3 Whether rate P3 is less than minimum output power Pmin and vehicle demand power P2 difference corresponding to the optimal economic region of engine 1, Wherein, if the charge power P3 of electrokinetic cell 3 is less than minimum output power Pmin corresponding to the optimal economic region of engine 1 And vehicle demand power P2 difference, then by controlling engine 1 to be generated electricity with the minimum output power to adjust auxiliary-motor 5 Generated output；If the charge power P3 of electrokinetic cell 3 is more than or equal to minimum output corresponding to the optimal economic region of engine 1 Power P min and vehicle demand power P2 difference, then according to the charge power P3 of electrokinetic cell 3 and vehicle demand power P2 sums Power output of the engine 1 in default optimal economic region is obtained, and by controlling engine 1 with the power output of acquisition Generated electricity to adjust the generated output of auxiliary-motor 5.
Specifically, control module 101 is additionally operable to：When the SOC value of low tension battery 20 is less than or equal to default low battery threshold During value, the SOC value rate of change of low tension battery 20 and the SOC value rate of change of electrokinetic cell 3 are obtained, and according to low pressure electric power storage The SOC value rate of change in pond 20 obtains the charge power P4 of low tension battery 20 and the SOC value changes speed according to electrokinetic cell 3 Rate obtains the charge power P3 of electrokinetic cell 3, and judges the charge power P4 of low tension battery 20 and the charging of electrokinetic cell 3 Whether the sum of power P 3 is less than minimum output power Pmin and vehicle demand power P2 corresponding to the optimal economic region of engine 1 Difference, wherein, if the charge power P3 sums of the charge power P4 of low tension battery 20 and electrokinetic cell 20 are less than engine 1 Optimal economic region corresponding to minimum output power Pmin and vehicle demand power P2 difference, then by control engine 1 with Minimum output power Pmin is generated electricity to adjust the generated output of auxiliary-motor 5；If the charge power of low tension battery 20 P4 minimum output powers corresponding with the optimal economic region that the charge power P3 sums of electrokinetic cell 3 are more than or equal to engine 1 Pmin and vehicle demand power P2 difference, then according to the charge power P3 of electrokinetic cell 3, the charge power P4 of low tension battery 20 Power output of the engine 1 in default optimal economic region is obtained with vehicle demand power P2 sums, and passes through control Engine 1 is generated electricity with the power output of acquisition to adjust the generated output of auxiliary-motor 5.
It should be noted that the SOC value rate of change for the electrokinetic cell 3 that can be prestored in control module 101 and electrokinetic cell 3 The first relation table between charge power P3, thus, control module 101 obtain electrokinetic cell 3 SOC value rate of change it Afterwards, the charge power P3 of corresponding electrokinetic cell 3 can be obtained by comparing the first relation table.For example, the SOC of electrokinetic cell 3 The first relation table between value changes speed and the charge power P3 of electrokinetic cell 3 can be as shown in table 1 below.
Table 1
The SOC value rate of change of electrokinetic cell 3 A1 A2 A3 A4 A5
The charge power of electrokinetic cell 3 B1 B2 B3 B4 B5
From upper table 1, when the SOC value rate of change of electrokinetic cell 3 is A1, control module 101 can obtain corresponding dynamic The charge power P3 of power battery 3 is B1；When the SOC value rate of change of electrokinetic cell 3 is A2, control module 101 can obtain pair The charge power P3 for the electrokinetic cell 3 answered is B2；When the SOC value rate of change of electrokinetic cell 3 is A3, control module 101 can obtain The charge power P3 of electrokinetic cell 3 is B3 corresponding to taking；The control module 101 when the SOC value rate of change of electrokinetic cell 3 is A4 The charge power P3 of electrokinetic cell 3 is B4 corresponding to can obtaining；When the SOC value rate of change of electrokinetic cell 3 is A5 time control moldings The charge power P3 that block 101 can obtain corresponding electrokinetic cell 3 is B5.
Similarly, can prestore SOC value rate of change and the low tension battery 20 of low tension battery 20 in control module 101 The second relation table between charge power P4, thus, control module 101 are obtaining the SOC value rate of change of low tension battery 20 Afterwards, the charge power P4 of corresponding low tension battery 20 can be obtained by comparing the second relation table.For example, low tension battery The first relation table between 20 SOC value rate of change and the charge power P4 of low tension battery 20 can be as shown in table 2 below.
Table 2
The SOC value rate of change of low tension battery 20 A11 A12 A13 A14 A15
The charge power of low tension battery 20 B11 B12 B13 B14 B15
From upper table 2, when the SOC value rate of change of low tension battery 20 is A11, control module 101 can obtain correspondingly The charge power P4 of low tension battery 20 be B11；The control module when the SOC value rate of change of low tension battery 20 is A12 The 101 charge power P4 that can obtain corresponding low tension battery 20 are B12；When the SOC value changes speed of low tension battery 20 is The charge power P4 that control module 101 can obtain corresponding low tension battery 20 during A13 is B13；As the SOC of low tension battery 20 The charge power P4 that control module 101 can obtain corresponding low tension battery 20 when value changes speed is A14 is B14；Work as low pressure Control module 101 can obtain the charge power P4 of corresponding low tension battery 20 when the SOC value rate of change of battery 20 is A15 For B15.
Specifically, after auxiliary-motor 5 enters generated output shaping modes, control module 101 can obtain low tension battery 20 SOC value, the SOC value of electrokinetic cell 3, vehicle demand power P2 (vehicle driving power P11 and electric equipment power P 21 it With), then, judge whether the SOC value of low tension battery 20 is more than default low battery threshold value.
If the SOC value of low tension battery 20 is more than default low battery threshold value, the SOC value for obtaining electrokinetic cell 3 becomes Change speed, and inquire about the charge power P3 of electrokinetic cell 3 corresponding to the SOC value rate of change of electrokinetic cell 3, it is suitable to select Charge power P3 the SOC value of electrokinetic cell 3 is increased, and determine whether electrokinetic cell 3 charge power P3 whether Less than minimum output power Pmin corresponding to the optimal economic region of engine 1 and vehicle demand power P2 difference, if it is, That is P3 ＜ Pmin-P2, then by controlling engine 1 to be generated electricity with minimum output power Pmin to adjust the hair of auxiliary-motor 5 Electrical power, that is, engine 1 is controlled to be run in minimum output power Pmin corresponding to optimal economic region；If not, i.e. P3 >= Pmin-P2, then according to the charge power P3 of electrokinetic cell 3 and vehicle demand power P2 sums obtain engine 1 it is default most Power output in good economic zone, and by controlling engine 1 to be generated electricity with the power output of acquisition to adjust auxiliary-motor 5 Generated output, i.e., search corresponding power output, the output work of the acquisition in the default optimal economic region of engine 1 Rate can be that charge power P3 and vehicle demand power the P2 sum of electrokinetic cell 3 are (P2+P3 or P11+P21+P3), now may be used Control engine 1 is generated electricity with the power output of acquisition.
If the SOC value of low tension battery 20 is less than or equal to default low battery threshold value, the SOC of electrokinetic cell 3 is obtained Value changes speed, and the charge power P3 of electrokinetic cell 3 corresponding to the SOC value rate of change of electrokinetic cell 3 is inquired about, to select Suitable charge power P3 enables the SOC value of electrokinetic cell 3 to rise, and obtains the SOC value changes speed of low tension battery 20 Rate, and the charge power P4 of low tension battery 20 corresponding to the SOC value rate of change of low tension battery 20 is inquired about, to select Suitable charge power P4 enables the SOC value of low tension battery 20 to rise, and determines whether the charging of low tension battery 20 The minimum output corresponding with the optimal economic region whether the charge power P3 sums of electrokinetic cell 3 are less than engine 1 of power P 4 Power P min and vehicle demand power P2 difference.If it is, i.e. P3+P4 ＜ Pmin-P2, then by control engine 1 with this most Small power output Pmin is generated electricity to adjust the generated output of auxiliary-motor 5, that is, controls engine 1 corresponding in optimal economic region Minimum output power Pmin operations, and vehicle demand power is subtracted with minimum output power Pmin corresponding to optimal economic region P2 power is that Pmin-P2 charges to electrokinetic cell 3 and low tension battery 20；If not, i.e. P3+P4 >=Pmin-P2, then basis The charge power P3 of electrokinetic cell 3, the charge power P4 of low tension battery 20 and vehicle demand power P2 sums obtain engine 1 power output in default optimal economic region, and by controlling engine 1 to be generated electricity with the power output of acquisition To adjust the generated output of auxiliary-motor 5, i.e., corresponding power is searched in the default optimal economic region of engine 1, this is obtained The power output taken is charge power P3, the charge power P4 and vehicle demand power P2 of low tension battery 20 of electrokinetic cell 3 Sum is (P2+P3+P4 or P11+P21+P3+P4), and controls engine 1 to be generated electricity with the power output of acquisition.
Thus, in low speed, engine can be operated in economic zone, and only generate electricity and be not involved in driving, so as to without using from Clutch, clutch abrasion or sliding wear are reduced, while reduce pause and transition in rhythm or melody sense, improve comfortableness, and reduce oil consumption, reduction is started Machine noise, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.
To sum up, the dynamical system of the hybrid vehicle proposed according to the utility model embodiment, engine pass through clutch Device outputs power to the wheel of hybrid vehicle, and power motor outputs driving force to the wheel of hybrid vehicle, power Battery is powered to power motor, to realize to power battery charging, to dynamic when auxiliary-motor is generated electricity under the drive of engine Force motor is powered, at least one in DC-DC converter power supply, the SOC value of control module acquisition electrokinetic cell, low pressure electric power storage The SOC value in pond and the speed of hybrid vehicle, and pair is controlled according to the SOC value of electrokinetic cell and the speed of hybrid vehicle Motor enters generated output shaping modes, so that engine operates in default optimal economic region, is generated electricity when auxiliary-motor enters After power adjusting pattern, control module is additionally operable to that the generated output of auxiliary-motor is adjusted according to the SOC value of low tension battery, So as to make engine be not involved in driving in low speed, and then without using clutch, clutch abrasion or sliding wear are reduced, simultaneously Reduce pause and transition in rhythm or melody sense, improve comfortableness, and engine can be made to be operated in economic zone in low speed, only generate electricity and do not drive It is dynamic, oil consumption is reduced, reduces engine noise, maintains vehicle low speed electric equilibrium and low speed ride comfort, lifts vehicle performance.
Embodiment five：
In some embodiments of the utility model, control module 101 is used for the SOC value (State for obtaining electrokinetic cell 3 Of Charge, state-of-charge, are also dump energy), the speed of the SOC value of low tension battery 20 and hybrid vehicle, and root The generating of auxiliary-motor 5 is controlled according to the speed of the SOC value of electrokinetic cell 3, the SOC value of low tension battery 20 and hybrid vehicle Power, and it is default to control engine 1 to operate according to the generated output of the generated output of auxiliary-motor 5 acquisition engine 1 Optimal economic region.
It should be noted that the SOC value of electrokinetic cell 3 and low can be gathered by the battery management system of hybrid vehicle The SOC value of battery 20 is pressed, so as to which battery management system is by the SOC value of the electrokinetic cell 3 collected and low tension battery 20 SOC value is sent to control module 101, so that control module 101 obtains the SOC value and low tension battery 20 of electrokinetic cell 3 SOC value.
It should be noted that the default optimal economic region that engine's fuel consumption characteristics loop image determines engine 1 can be combined. An example of engine's fuel consumption characteristics loop image is illustrated in figure 7, wherein, side ordinate is the output torque of engine 1, horizontal Coordinate is the rotating speed of engine 1, and curve a is the fuel-economy curve of engine 1.Region corresponding to fuel-economy curve is to send out The optimal economic region of motivation, that is, say when the torque of engine 1 and moment of torsion are located on the fuel-economy curve of engine optimum, Engine is in optimal economic region.Thus, in the utility model embodiment, control module 101 can be by controlling engine 1 Rotating speed and output torque fall in engine fuel economic curve for example on curve a so that engine 1 operate in it is default optimal Economic zone.
Specifically, during hybrid electric vehicle is sailed, engine 1 can be output power to mixed by clutch 6 The wheel 7 of power vehicle is closed, and engine 1 can also drive auxiliary-motor 5 to be generated electricity.Thus, the power output master of engine To include two parts, part output to auxiliary-motor 5, that is, the generated output for driving auxiliary-motor 5 to be generated electricity, another part is defeated Go out to the driving power of wheel 7, i.e. driving moment 7.
Engine 1 drive auxiliary-motor 5 generated electricity when, control module 101 can obtain first electrokinetic cell 3 SOC value, The SOC value of low tension battery 20 and the speed of hybrid vehicle, then according to the SOC value of electrokinetic cell 3, low tension battery 20 SOC value and hybrid vehicle speed control auxiliary-motor 5 generated output, and further according to the generating work(of auxiliary-motor 5 Rate obtains the generated output of engine 1, to control engine 1 to operate in default optimal economic region.In other words, control module 101 can control the generated output of auxiliary-motor 5 on the premise of engine 1 is operated in default optimal economic region.
Thereby, it is possible to make engine 1 be operated in default optimal economic region, because engine 1 is in default optimal warp Help region oil consumption is minimum, fuel economy highest, so as to reduce the oil consumption of engine 1, reduce the noise of engine 1, carry The economy of high vehicle operation.Auxiliary-motor 5 has higher generated output and generating efficiency when being additionally, since low speed, so as to To meet the power demand run at a low speed, vehicle low speed electric equilibrium can be maintained, vehicle low speed ride comfort is maintained, lifts vehicle Power performance.Wherein, by power battery charging, it can be ensured that the power demand of power motor and high-voltage electrical equipment, and then Ensure that power motor drives vehicle normally travel, also, by being charged to low tension battery, it can be ensured that the use of low voltage equipment Electric demand, and vehicle can be realized by low tension battery when auxiliary-motor stops generating and electrokinetic cell failure or not enough power supply Low-voltage power supply, and then ensure that vehicle can realize pure fuel oil pattern traveling, improve vehicle distance travelled.
Further, it is used for according to one embodiment of the present utility model, control module 101：As the SOC of electrokinetic cell 3 When value is more than default limiting value and is less than or equal to the first preset value, if the speed of hybrid vehicle is less than the first default car Speed, then the generated output of auxiliary-motor 5 is controlled.
Wherein, the first preset value can be the upper bound limit value of the SOC value of the electrokinetic cell 3 pre-set, for example, stop filling The decision content of electricity, is preferably 30%.Default limiting value can be the lower bound limit value of the SOC value of the electrokinetic cell 3 pre-set, For example, stop the decision content of electric discharge, be preferably 10%.Can be by electrokinetic cell according to the first preset value and default limiting value 3 SOC value is divided into three sections, i.e. the first electricity section, the second electricity section and the 3rd electricity section, when electrokinetic cell 3 When SOC value is less than or equal to default limiting value, the SOC value of electrokinetic cell 3 is in the first electricity section, now electrokinetic cell 3 Only charging is not discharged；When the SOC value of electrokinetic cell 3 is more than default limiting value and is less than or equal to the first preset value, power The SOC value of battery 3 is in the second electricity section, and now electrokinetic cell 3 has charge requirement, you can is actively filled to electrokinetic cell 3 Electricity；When the SOC value of electrokinetic cell 3 is more than the first preset value, the SOC value of electrokinetic cell 3 is in the 3rd electricity section, now moves Power battery 3 can not charge, i.e., actively will not be charged to electrokinetic cell 3.Specifically, control module 101 is obtaining electrokinetic cell 3 SOC value and hybrid vehicle speed after, the section residing for the SOC value of electrokinetic cell 3 is can determine whether, if power electric The SOC value in pond 3 is in middle electricity section, and the SOC value of electrokinetic cell 3 is more than default limiting value and preset less than or equal to first Value, then illustrate to charge to electrokinetic cell 3, now control module 101 determines whether that the speed of hybrid vehicle is It is no to be less than the first preset vehicle speed, if the speed of hybrid vehicle is less than the first preset vehicle speed, the generating work(to auxiliary-motor 5 Rate is controlled, and now the speed of hybrid vehicle is relatively low, and required driving force is less, and power motor 2 is enough to drive mixing Power vehicle travels, and engine 1 only can drive auxiliary-motor 5 to be generated electricity, and be not involved in driving.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
Further, control module 101 is additionally operable to：When electrokinetic cell 3 SOC value be more than default limiting value and less than etc. When the speed of the first preset value and hybrid vehicle is less than the first preset vehicle speed, the vehicle of hybrid vehicle is obtained Demand power, and when vehicle demand power is less than or equal to the maximum allowable generated output of auxiliary-motor 5, then to the hair of auxiliary-motor 5 Electrical power is controlled.
That is, it is more than default limiting value in the SOC value for judging electrokinetic cell 3 and is preset less than or equal to first Value, and the speed of hybrid vehicle is less than after the first preset vehicle speed, control module 101 can also determine whether that vehicle needs Ask whether power is more than the maximum allowable generated output of auxiliary-motor 5, if vehicle demand power is less than or equal to the maximum of auxiliary-motor 5 Allow generated output, then the generated output of auxiliary-motor 5 is controlled, now, the driving force needed for vehicle is less, and vehicle needs Ask power smaller, power motor 2 is enough to drive hybrid electric vehicle to sail, and engine 1 only can drive auxiliary-motor 5 to be generated electricity, It is not involved in driving.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
Further, control module 101 is additionally operable to：When the SOC value of electrokinetic cell 3 is more than default limiting value and is less than Speed equal to the first preset value, hybrid vehicle is less than the first preset vehicle speed and vehicle demand power is less than or equal to secondary electricity During the maximum allowable generated output of machine 5, the gas pedal depth of hybrid vehicle and the vehicle resistance of hybrid vehicle are obtained Power, and it is pre- less than or equal to first less than or equal to the vehicle resistance of the first predetermined depth and hybrid vehicle in gas pedal depth During handicapping power, then the generated output of auxiliary-motor 5 is controlled.
It should be noted that the car resistance that the vehicle resistance of hybrid vehicle can be hybrid vehicle for example rolls Resistance, acceleration resistance, grade resistance and air drag etc..
That is, it is more than default limiting value in the SOC value for judging electrokinetic cell 3 and is preset less than or equal to first Value, and the speed of hybrid vehicle is less than the first preset vehicle speed, and vehicle demand power is permitted less than or equal to the maximum of auxiliary-motor 5 Perhaps after generated output, control module 101 can also determine whether gas pedal depth whether be more than the first predetermined depth or Whether the vehicle resistance of person's hybrid vehicle is more than the first default resistance, is preset if gas pedal depth is less than or equal to first The vehicle resistance of depth and hybrid vehicle is less than or equal to the first default resistance, then the generated output of auxiliary-motor 5 is controlled System, now, the driving force needed for vehicle is less, and vehicle demand power is smaller, and gas pedal depth is smaller, vehicle resistance also compared with Small, power motor 2 is enough to drive hybrid electric vehicle to sail, and engine 1 only can drive auxiliary-motor 5 to be generated electricity, and be not involved in driving It is dynamic.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
As above, when hybrid vehicle is run at a low speed, engine 1 can only generate electricity and be not involved in driving, due to engine not Driving is participated in, clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving easypro Adaptive, also, engine is operated in economic zone in low speed, due to oil consumption of the engine in default optimal economic region Minimum, fuel economy highest, so as to reduce oil consumption, engine noise is reduced, the economy of vehicle operation is improved, so as to tie up Vehicle low speed electric equilibrium and low speed ride comfort are held, lifts vehicle performance.
According to a specific embodiment of the present utility model, control module 101 is additionally operable to：When control 1 independent band of engine Dynamic auxiliary-motor 5 generated electricity and control power motor 2 alone output driving power when, the hair of engine 1 is obtained according to below equation Electrical power：
P0=P1/ η/ζ
Wherein, P0 is the generated output of engine 1, and P1 is the generated output of auxiliary-motor 5, and η Belt Transmission Efficiencies, ζ is pair The efficiency of motor 5.
That is, engine 1 can only generate electricity be not involved in driving in the case of, control module 101 can be according to auxiliary-motor 5 Generated output, the efficiency ζ of Belt Transmission Efficiency η and auxiliary-motor 5 calculates the generated output P0 of engine 1, and controls and start Machine 1 drives auxiliary-motor 5 to be generated electricity with the generated output P0 of acquisition, to control the generated output of auxiliary-motor 5.
In addition, according to one embodiment of the present utility model, control module 101 is additionally operable to：In the SOC value of electrokinetic cell 3 It is more than or equal to the first preset vehicle speed less than default limiting value or the speed of hybrid vehicle or vehicle demand power is big It is more than the first predetermined depth or hybrid vehicle in the maximum allowable generated output or gas pedal depth of auxiliary-motor 5 Vehicle resistance when being more than the first default resistance, control engine 1 participates in driving.
That is, in speed of the SOC value of electrokinetic cell 3 less than default limiting value M2 or hybrid vehicle The maximum allowable generated output or throttle for being more than auxiliary-motor 5 more than or equal to the first preset vehicle speed or vehicle demand power are stepped on When plate depth is more than the vehicle resistance of the first predetermined depth or hybrid vehicle more than the first default resistance, control module 101 control engines 1 participate in driving, and now, electrokinetic cell 3 no longer discharges, the driving force needed for vehicle is larger, vehicle demand work( Rate is larger, gas pedal depth is larger or vehicle resistance is also larger, and power motor 2 is not enough to drive hybrid electric vehicle to sail, Engine 1 participates in driving to carry out supplying driving.
Thus, engine 1 can participate in driving in the driving force deficiency that power motor 2 exports, so that it is guaranteed that vehicle is normal Traveling, the power performance of vehicle is improved, improve the distance travelled of vehicle.
More specifically, control module 101 is additionally operable to：When vehicle demand power is more than the maximum allowable generating work(of auxiliary-motor 5 During rate, engine 1 is also controlled to participate in driving so that engine 1 outputs power to wheel by clutch.
Also, control module 101 is additionally operable to：When the SOC value of electrokinetic cell 3 is less than or equal to default limiting value, control Engine 1 participates in driving so that engine 1 outputs power to wheel by clutch 6；When the SOC value of electrokinetic cell 3 is less than Speed equal to the first preset value, hybrid vehicle is less than the first preset vehicle speed and gas pedal depth is more than first and preset deeply When spending, control engine 1 participates in driving so that engine 1 outputs power to wheel by clutch 6；When electrokinetic cell 3 SOC value is less than or equal to the first preset value, the speed of hybrid vehicle is less than the whole of the first preset vehicle speed and hybrid vehicle When car resistance is more than the first default resistance, engine 1 participates in driving so that engine 1 outputs power to car by clutch 6 Wheel.
That is, control module 101 can obtain the SOC value of electrokinetic cell 3, the gas pedal of hybrid vehicle in real time Depth, speed, vehicle resistance and vehicle demand power, and SOC value to electrokinetic cell 3, the throttle of hybrid vehicle are stepped on Plate depth, speed and vehicle resistance are judged：
First, when the SOC value of electrokinetic cell 3 is less than default limiting value, because of the low battery of electrokinetic cell 3, power Battery 3 can not provide enough electric energy, and control module 101 controls engine 1 and power motor 2 to simultaneously participate in driving, this time control The also controllable engine 1 of molding block 101 drives auxiliary-motor 5 to be generated electricity, and by controlling the generated output of engine 1 to make Engine 1 is operated in default optimal economic region.
Second, when the SOC value of electrokinetic cell 3 is less than or equal to the first preset value, the speed of hybrid vehicle is less than first Preset vehicle speed and when gas pedal depth is more than the first predetermined depth, because gas pedal depth is deeper, the control hair of control module 101 Motivation 1 and power motor 2 simultaneously participate in driving, and now the also controllable engine 1 of control module 101 drives auxiliary-motor 5 to be sent out Electricity, and by controlling the generated output of engine 1 that engine 1 can be made to be operated in default optimal economic region.
Third, when the SOC value of electrokinetic cell 3 is less than or equal to the first preset value, the speed of hybrid vehicle is less than first When the vehicle resistance of preset vehicle speed and hybrid vehicle is more than the first default resistance, because vehicle resistance is larger, control module 101 Control engine 1 and power motor 2 simultaneously participate in driving, and now the also controllable engine 1 of control module 101 drives auxiliary-motor 5 Generated electricity, and by controlling the generated output of engine 1 that engine 1 can be made to be operated in default optimal economic region.
Thus, engine 1 can participate in driving in the driving force deficiency that power motor 2 exports, so that it is guaranteed that vehicle is normal Traveling, the power performance of vehicle is improved, improve the distance travelled of vehicle.Also, controllable engine is operated in economic zone Domain, because oil consumption of the engine 1 in default optimal economic region is minimum, fuel economy highest, so as to reduce oil consumption, drop Low engine noise, improve vehicle economic performance.
In addition, control module 101 is additionally operable to：When the SOC value of electrokinetic cell 3 is less than or equal to default limiting value, and mixing When the speed of power vehicle is more than the first preset vehicle speed, control engine 1 will participate in driving so that engine 1 will by clutch 6 Power output is to wheel 7.
Thus, engine 1 can participate in driving in the driving force deficiency that power motor 2 exports, so that it is guaranteed that vehicle is normal Traveling, the power performance of vehicle is improved, improve the distance travelled of vehicle.
However, it is to be understood that control module 101 is additionally operable to：When the SOC value of electrokinetic cell 3 is more than the first preset value When, engine 1 does not drive auxiliary-motor 5 to be generated electricity, and now the electricity of electrokinetic cell 3 is close to full electricity, without charging, engine 1 Auxiliary-motor 5 is not driven to be generated electricity.That is, when the electricity of electrokinetic cell 3 is close full electric, engine 1 does not drive secondary electricity Machine 5 is generated electricity, so as to which auxiliary-motor 5 does not charge to electrokinetic cell 3.
Furthermore, when 1 drive auxiliary-motor 5 of engine, which generates electricity, is not involved in driving, control module 101 can be to secondary electricity The generated output of machine 5 is controlled, and the generated output control process of the control module 101 of the utility model embodiment is entered below Row specifically describes.
According to one embodiment of the present utility model, control module 101 is additionally operable to：According to the vehicle need of hybrid vehicle The charge power of power, the charge power of electrokinetic cell 3 and low tension battery 20 is asked to control the generated output of auxiliary-motor 5 System.
Specifically, according to the vehicle demand power of hybrid vehicle, the charge power and low tension battery of electrokinetic cell 3 The formula of the generated output of 20 charge power control auxiliary-motor 5 is as follows：
P1=P2+P3+P4, wherein, P2=P11+P21,
Wherein, P1 is the generated output of auxiliary-motor 5, and P2 is vehicle demand power, and P3 is the charge power of electrokinetic cell 3, P4 is the charge power of low tension battery 20, and P11 is vehicle driving power, and P21 is electric equipment power.
It should be noted that electric equipment includes the first electric equipment 10 and the second electric equipment 30, i.e. electric equipment work( Rate P21 may include high-voltage electrical equipment and the power needed for low voltage equipment.
It should be noted that vehicle driving power P11 may include the power output of power motor 2, control module 101 can root Vehicle driving power P11 is obtained according to the rotating speed of the default throttle-torque curve and power motor 2 of power motor 2, wherein, in advance If throttle-torque curve can be determined when hybrid electric vehicle power matches；What control module 101 can be run according to vehicle Electric equipment obtains electric equipment power P 21 in real time, such as calculates electric equipment power P 21 by DC consumption in bus；Control Molding block 101 can obtain the charge power P3 of electrokinetic cell 3 according to the SOC value of electrokinetic cell 3, and according to low tension battery 20 SOC value obtains the charge power P4 of low tension battery 20.
Specifically, during hybrid electric vehicle is sailed, control module 101 can obtain the charging work(of electrokinetic cell 3 Rate P3, the charge power P4 of low tension battery 20, vehicle driving power P11 and electric equipment power P 21, and by electrokinetic cell 3 charge power P3, the charge power P4 of low tension battery 20, vehicle driving power P11 and the sum of electric equipment power P 21 As the generated output P1 of auxiliary-motor 5, thus, control module 101 can be according to generating work(of the P1 values calculated to auxiliary-motor 5 Rate is controlled, such as control module 101 can be controlled according to the P1 values calculated to the output torque and rotating speed of engine 1 System, it is controlled with the power for driving auxiliary-motor 5 to be generated electricity in engine 1.
Further, it is additionally operable to according to one embodiment of the present utility model, control module 101：Obtain electrokinetic cell 3 SOC value rate of change, and according to vehicle demand power P2 minimum output powers corresponding with the optimal economic region of engine 1 Relation and the SOC value rate of change of electrokinetic cell 3, the SOC value of low tension battery 20, low tension battery 20 between Pmin SOC value rate of change controls the generated output of auxiliary-motor 5.
It should be appreciated that the SOC value that control module 101 can obtain electrokinetic cell 3 according to the SOC value of electrokinetic cell 3 becomes Change speed, for example, each time interval t gathers the SOC value of an electrokinetic cell 3, so can be by the current SOC of electrokinetic cell 3 Value and the difference of previous SOC value and SOC value rate of change of the time interval t ratio as electrokinetic cell 3.Similarly, can basis The SOC value of low tension battery 20 obtains the SOC value rate of change of low tension battery 20, for example, each time interval t collections are once The SOC value of low tension battery 20, so can be by the difference of the current SOC value of low tension battery 20 and previous SOC value and time interval t SOC value rate of change of the ratio as low tension battery 20.
Specifically, the optimal economic region of engine can be determined according to the universal characteristic curve of engine shown in Fig. 7, is entered And obtain minimum output power Pmin corresponding to the optimal economic region of engine, control module 101 it is determined that engine most After minimum output power Pmin corresponding to good economic zone, you can according to vehicle demand power P2 and the optimal warp of engine 1 SOC value rate of change, the low tension battery of relation and electrokinetic cell 3 between minimum output power Pmin corresponding to Ji region The generated output of 20 SOC value, the SOC value rate of change control auxiliary-motor 5 of low tension battery 20.
Thus, when hybrid vehicle is run at a low speed, engine is operated in economic zone, oil consumption can be reduced, reduce Engine noise, the economic performance of vehicle is improved, also, in low speed, engine 1 only generating can be not involved in driving, due to starting Machine is not involved in driving, and clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving Comfortableness, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.
It is described further below when 1 drive generating of auxiliary-motor 5 of engine is not involved in driving, the basis of control module 101 Relation and power between vehicle demand power P2 minimum output power Pmin corresponding with the optimal economic region of engine 1 The SOC value rate of change of battery 3, the SOC value of low tension battery 20, the secondary electricity of SOC value rate of change regulation of low tension battery 20 The specific control mode of the generated output of machine 5.
Specifically, control module 101 is additionally operable to：When the SOC value of low tension battery 20 is more than default low battery threshold value, The charge power P3 of electrokinetic cell 3 is obtained according to the SOC value rate of change of electrokinetic cell 3, and judges the charging work(of electrokinetic cell 3 Whether rate P3 is less than minimum output power Pmin and vehicle demand power P2 difference corresponding to the optimal economic region of engine 1, Wherein, if the charge power P3 of electrokinetic cell 3 is less than minimum output power Pmin corresponding to the optimal economic region of engine 1 And vehicle demand power P2 difference, then by controlling engine 1 to be generated electricity with the minimum output power to control auxiliary-motor 5 Generated output；If the charge power of electrokinetic cell 3 is more than or equal to minimum output work corresponding to the optimal economic region of engine 1 Rate Pmin and vehicle demand power P2 difference, then obtained according to the charge power P3 of electrokinetic cell 3 and vehicle demand power P2 sums Power output of the engine 1 in default optimal economic region is taken, and by controlling engine 1 to enter with the power output of acquisition Row generates electricity to control the generated output of auxiliary-motor 5.
Specifically, control module 101 is additionally operable to：When the SOC value of low tension battery 20 is less than or equal to default low battery threshold During value, the SOC value rate of change of low tension battery 20 and the SOC value rate of change of electrokinetic cell 3 are obtained, and according to low pressure electric power storage The SOC value rate of change in pond 20 obtains the charge power P4 of low tension battery 20 and the SOC value changes speed according to electrokinetic cell 3 Rate obtains the charge power P3 of electrokinetic cell 3, and judges the charge power P4 of low tension battery 20 and the charging of electrokinetic cell 3 Whether the sum of power P 3 is less than minimum output power Pmin and vehicle demand power P2 corresponding to the optimal economic region of engine 1 Difference, wherein, if the charge power P3 sums of the charge power P4 of low tension battery 20 and electrokinetic cell 3 are less than engine 1 Optimal economic region corresponding to minimum output power Pmin and vehicle demand power P2 difference, then by control engine 1 with Minimum output power Pmin is generated electricity to control the generated output of auxiliary-motor 5；If the charge power of low tension battery 20 P4 minimum output powers corresponding with the optimal economic region that the charge power P3 sums of electrokinetic cell 3 are more than or equal to engine 1 Pmin and vehicle demand power P2 difference, then according to the charge power P3 of electrokinetic cell 3, the charge power P4 of low tension battery 20 Power output of the engine 1 in default optimal economic region is obtained with vehicle demand power P2 sums, and passes through control Engine 1 is generated electricity with the power output of acquisition to control the generated output of auxiliary-motor 5.
It should be noted that the SOC value rate of change for the electrokinetic cell 3 that can be prestored in control module 101 and electrokinetic cell 3 The first relation table between charge power P3, thus, control module 101 obtain electrokinetic cell 3 SOC value rate of change it Afterwards, the charge power P3 of corresponding electrokinetic cell 3 can be obtained by comparing the first relation table.For example, the SOC of electrokinetic cell 3 The first relation table between value changes speed and the charge power P3 of electrokinetic cell 3 can be as shown in table 1 below.
Table 1
The SOC value rate of change of electrokinetic cell 3 A1 A2 A3 A4 A5
The charge power of electrokinetic cell 3 B1 B2 B3 B4 B5
From upper table 1, when the SOC value rate of change of electrokinetic cell 3 is A1, control module 101 can obtain corresponding dynamic The charge power P3 of power battery 3 is B1；When the SOC value rate of change of electrokinetic cell 3 is A2, control module 101 can obtain pair The charge power P3 for the electrokinetic cell 3 answered is B2；When the SOC value rate of change of electrokinetic cell 3 is A3, control module 101 can obtain The charge power P3 of electrokinetic cell 3 is B3 corresponding to taking；The control module 101 when the SOC value rate of change of electrokinetic cell 3 is A4 The charge power P3 of electrokinetic cell 3 is B4 corresponding to can obtaining；When the SOC value rate of change of electrokinetic cell 3 is A5 time control moldings The charge power P3 that block 101 can obtain corresponding electrokinetic cell 3 is B5.
Similarly, can prestore SOC value rate of change and the low tension battery 20 of low tension battery 20 in control module 101 The second relation table between charge power P4, thus, control module 101 are obtaining the SOC value rate of change of low tension battery 20 Afterwards, the charge power P4 of corresponding low tension battery 20 can be obtained by comparing the second relation table.For example, low tension battery The first relation table between 20 SOC value rate of change and the charge power P4 of low tension battery 20 can be as shown in table 2 below.
Table 2
The SOC value rate of change of low tension battery 20 A11 A12 A13 A14 A15
The charge power of low tension battery 20 B11 B12 B13 B14 B15
From upper table 2, when the SOC value rate of change of low tension battery 20 is A11, control module 101 can obtain correspondingly The charge power P4 of low tension battery 20 be B11；The control module when the SOC value rate of change of low tension battery 20 is A12 The 101 charge power P4 that can obtain corresponding low tension battery 20 are B12；When the SOC value changes speed of low tension battery 20 is The charge power P4 that control module 101 can obtain corresponding low tension battery 20 during A13 is B13；As the SOC of low tension battery 20 The charge power P4 that control module 101 can obtain corresponding low tension battery 20 when value changes speed is A14 is B14；Work as low pressure Control module 101 can obtain the charge power P4 of corresponding low tension battery 20 when the SOC value rate of change of battery 20 is A15 For B15.
Specifically, when controlling the generated output of auxiliary-motor 5 to be controlled, control module 101 can obtain low pressure electric power storage The SOC value in pond 20, the SOC value of electrokinetic cell 3, vehicle demand power P2 (vehicle driving power P11 and electric equipment power P 21 Sum), then, judge whether the SOC value of low tension battery 20 is more than default low battery threshold value.
If the SOC value of low tension battery 20 is more than default low battery threshold value, the SOC value for obtaining electrokinetic cell 3 becomes Change speed, and inquire about the charge power P3 of electrokinetic cell 3 corresponding to the SOC value rate of change of electrokinetic cell 3, it is suitable to select Charge power P3 the SOC value of electrokinetic cell 3 is increased, and determine whether electrokinetic cell 3 charge power P3 whether Less than minimum output power Pmin corresponding to the optimal economic region of engine 1 and vehicle demand power P2 difference, if it is, That is P3 ＜ Pmin-P2, then by controlling engine 1 to be generated electricity with minimum output power Pmin to control the hair of auxiliary-motor 5 Electrical power, that is, engine 1 is controlled to be run in minimum output power Pmin corresponding to optimal economic region；If not, i.e. P3 >= Pmin-P2, then according to the charge power P3 of electrokinetic cell 3 and vehicle demand power P2 sums obtain engine 1 it is default most Power output in good economic zone, and by controlling engine 1 to be generated electricity with the power output of acquisition to control auxiliary-motor 5 Generated output, i.e., search corresponding power output, the output work of the acquisition in the default optimal economic region of engine 1 Rate can be that charge power P3 and vehicle demand power the P2 sum of electrokinetic cell 3 are (P2+P3 or P11+P21+P3), now may be used The power output that control engine 1 obtains is generated electricity.
If the SOC value of low tension battery 20 is less than or equal to default low battery threshold value, the SOC of electrokinetic cell 3 is obtained Value changes speed, and the charge power P3 of electrokinetic cell 3 corresponding to the SOC value rate of change of electrokinetic cell 3 is inquired about, to select Suitable charge power P3 enables the SOC value of electrokinetic cell 3 to rise, and obtains the SOC value changes speed of low tension battery 20 Rate, and the charge power P4 of low tension battery 20 corresponding to the SOC value rate of change of low tension battery 20 is inquired about, to select Suitable charge power P4 enables the SOC value of low tension battery 20 to rise, and determines whether the charging of low tension battery 20 The minimum output corresponding with the optimal economic region whether the charge power P3 sums of electrokinetic cell 3 are less than engine 1 of power P 4 Power P min and vehicle demand power P2 difference.If it is, i.e. P3+P4 ＜ Pmin-P2, then by control engine 1 with this most Small power output Pmin is generated electricity to control the generated output of auxiliary-motor 5, that is, controls engine 1 corresponding in optimal economic region Minimum output power Pmin operations, and vehicle demand power is subtracted with minimum output power Pmin corresponding to optimal economic region P2 power is that Pmin-P2 charges to electrokinetic cell 3 and low tension battery 20；If not, i.e. P3+P4 >=Pmin-P2, then basis The charge power P3 of electrokinetic cell 3, the charge power P4 of low tension battery 20 and vehicle demand power P2 sums obtain engine 1 power in default optimal economic region, and by controlling engine 1 to be generated electricity with the power output of acquisition to control The generated output of auxiliary-motor 5 processed, i.e., corresponding power is searched in the default optimal economic region of engine 1, the acquisition Power output can be the charge power P3 of electrokinetic cell 3, low tension battery 20 charge power P4 and vehicle demand power P2 it With i.e. (P2+P3+P4 or P11+P21+P3+P4), and engine 1 is controlled to be generated electricity with the power output of acquisition.
Thus, in low speed, engine can be operated in economic zone, and only generate electricity and be not involved in driving, so as to without using from Clutch, clutch abrasion or sliding wear are reduced, while reduce pause and transition in rhythm or melody sense, improve comfortableness, and reduce oil consumption, reduction is started Machine noise, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.
To sum up, the dynamical system of the hybrid vehicle proposed according to the utility model embodiment, engine pass through clutch Device outputs power to the wheel of hybrid vehicle, and power motor outputs driving force to the wheel of hybrid vehicle, power Battery is powered to power motor, to realize to power battery charging, to dynamic when auxiliary-motor is generated electricity under the drive of engine Force motor is powered, at least one in DC-DC converter power supply, the SOC value of control module acquisition electrokinetic cell, low pressure electric power storage The SOC value in pond and the speed of hybrid vehicle, and it is dynamic according to the SOC value of electrokinetic cell, the SOC value of low tension battery and mixing The generated output of the speed control auxiliary-motor of power automobile, and the generated output according to the generated output of auxiliary-motor acquisition engine To control engine to operate in default optimal economic region, so as to make engine be not involved in driving in low speed, and then Without using clutch, clutch abrasion or sliding wear are reduced, while reduces pause and transition in rhythm or melody sense, improves comfortableness, and in low speed Engine can be made to be operated in economic zone, only generating electricity does not drive, and reduces oil consumption, reduces engine noise, maintains vehicle low speed Electric equilibrium and low speed ride comfort, lift vehicle performance.
In addition, the utility model embodiment, which also proposed, is used for electric power generation in a kind of dynamical system of hybrid vehicle Regulator rectifier circuit.Describe to be used in the dynamical system of the hybrid vehicle of the utility model embodiment below in conjunction with the accompanying drawings The regulator rectifier circuit of electric power generation.
Fig. 8 is the structured flowchart of the dynamical system of the hybrid vehicle of the utility model one embodiment.Such as Fig. 8 institutes Show, the dynamical system of the hybrid vehicle includes：Engine 1, power motor 2, electrokinetic cell 3, DC-DC converter 4, secondary electricity Machine 5 and mu balanced circuit 300.
With reference to shown in Fig. 8-10, engine 1 outputs power to the wheel 7 of hybrid vehicle by clutch 6；Power Motor 2 is used for the wheel 7 for outputting driving force to hybrid vehicle.That is, the dynamical system of the utility model embodiment Power can be provided for hybrid vehicle normally travel by engine 1 and/or power motor 2, in other words, in the utility model Some embodiments in, the power source of dynamical system can be engine 1 and power motor 2, in engine 1 and power motor 2 Any one can individually export power to wheel 7, or, engine 1 and power motor 2 can export power simultaneously to wheel 7.
Electrokinetic cell 3 is used to power to power motor 2；Auxiliary-motor 5 is connected with engine 1, for example, auxiliary-motor 5 can pass through The train end of engine 1 is connected with engine 1, auxiliary-motor 5 respectively with power motor 2, DC-DC converter 4 and the phase of electrokinetic cell 3 Even.Mu balanced circuit 300 is connected between auxiliary-motor 5 and DC-DC converter 4, and mu balanced circuit 300 exports when being generated electricity to auxiliary-motor 5 Direct current to DC-DC converter 4 carries out voltage stabilizing processing, so that the voltage after stable is low to vehicle by DC-DC converter 4 Press electric power supply.In other words, after the electric energy exported when auxiliary-motor 5 generates electricity is by mu balanced circuit 300, output burning voltage supply DC-DC converter 4.
Thus, power motor 2 and auxiliary-motor 5 can correspond to respectively serves as motor and generator, so as to secondary electricity during low speed Machine 5 can have higher generated output and generating efficiency, so as to meet the power demand run at a low speed, maintain vehicle low speed electricity Balance, low speed ride comfort is maintained, lift vehicle performance.And exported when can be generated electricity by mu balanced circuit 300 to auxiliary-motor 5 to DC- The direct current of DC converters 4 carries out voltage stabilizing processing, the input voltage of DC-DC converter 4 is kept stable, so as to ensure DC-DC Converter normal work.
Further, when auxiliary-motor 5 is generated electricity under the drive of engine 1, can be achieved to charge to electrokinetic cell 3, to Power motor 2 is powered, at least one in the power supply of DC-DC converter 4.In other words, engine 1 can drive auxiliary-motor 5 to send out Electricity, electric energy caused by auxiliary-motor 5 can provide at least one into electrokinetic cell 3, power motor 2 and DC-DC converter 4.Should When understanding, engine 1 can drive auxiliary-motor 5 to generate electricity, also can individually drive auxiliary-motor while power is exported to wheel 7 5 generate electricity.
Wherein, auxiliary-motor 5 can be BSG motors.It should be noted that auxiliary-motor 5 belongs to high-voltage motor, such as auxiliary-motor 5 Generating voltage it is suitable with the voltage of electrokinetic cell 3, so as to which electric energy caused by auxiliary-motor 5 can be without voltage transformation directly to dynamic Power battery 3 charges, and can also be powered to power motor 2 and/or DC-DC converter 4.And auxiliary-motor 5 may belong to efficiency power generation Machine, such as the generating efficiency that the generating of auxiliary-motor 5 is achievable more than 97% is driven under the idling speed of engine 1.
It should be noted that mu balanced circuit 300 can be arranged on the output line of auxiliary-motor 5, auxiliary-motor 5 passes through voltage stabilizing electricity Road 300 is connected with power motor 2, electrokinetic cell 3 and DC-DC converter 4 respectively, and as shown in figure 9b, now, auxiliary-motor 5 generates electricity When can by mu balanced circuit 300 export burning voltage, realize charging to the voltage stabilizing of electrokinetic cell 3, to the voltage stabilizing of power motor 2 power supply, The voltage stabilizing of DC-DC converter 4 power supply is given, thus, no matter whether electrokinetic cell 3 and DC-DC converter 4 connect, and can guarantee that DC- The normal work of DC converters 4.Mu balanced circuit 300 can also be arranged on the inlet wire of DC-DC converter 4, and auxiliary-motor 5 can be distinguished It is connected with DC-DC converter 4, electrokinetic cell 3, while electrokinetic cell 3 can be connected with DC-DC converter 4, such as Fig. 8, Fig. 9 a institute Show, thus, when electrokinetic cell 3 and DC-DC converter 4 disconnect, auxiliary-motor 5 is exported to DC-DC converter 4 when generating electricity Voltage be still stable, and then ensure that the normal work of DC-DC converters 4.
Further, auxiliary-motor 5 can be used for starting engine 1, i.e. auxiliary-motor 5 can realize the function of starting engine 1, example Such as when starting engine 1, auxiliary-motor 5 can drive the crank rotation of engine 1, so that the piston of engine 1 reaches ignition position Put, so as to realize the startup of engine 1, thus auxiliary-motor 5 can realize the function of the starter motor in correlation technique.
As described above, engine 1 and power motor 2 are used equally for driving the wheel 7 of hybrid vehicle.For example, as schemed Shown in 9a, 9b, engine 1 and power motor 2 drive jointly the same wheel of hybrid vehicle such as a pair of front-wheels 71 (including The near front wheel and off-front wheel).In other words, when engine 1 and power motor 2 a pair of front-wheels 71 of driving jointly, the drive of dynamical system Power will be exported to a pair of front-wheels 71, and vehicle uses two type of drive driven.
Further, under two type of drive driven, with reference to shown in Fig. 9 a, Fig. 9 b, the dynamical system of hybrid vehicle, Also include main reducing gear 9 and speed changer 90, wherein, engine 1 is defeated by power by clutch 6, speed changer 90, main reducing gear 9 Go out the first wheel such as a pair of front-wheels 71 to hybrid vehicle, power motor 2 outputs driving force to mixed by main reducing gear 9 Close the first wheel such as a pair of front-wheels 71 of power vehicle.Wherein, clutch 6 can be integrally disposed with speed changer 90.
In embodiment of the present utility model, because the generating voltage of auxiliary-motor 5 is usually to be connected to the two of electrokinetic cell 3 End, therefore when electrokinetic cell 3 is connected with DC-DC converter 4, it is stable to input to the voltage of DC-DC converter 4.When dynamic When power battery 3 fails or damages and disconnected with DC-DC converter 4, the exchange exported when being generated electricity to auxiliary-motor 5 is now needed Electricity is controlled, you can is exported when being generated electricity by mu balanced circuit 300 to auxiliary-motor 5 to the direct current progress of DC-DC converter 4 Voltage stabilizing is handled.
In some embodiments of the utility model, as shown in Figure 10, auxiliary-motor 5 includes auxiliary-motor controller 51, secondary electricity Machine controller 51 includes inverter 511 and adjuster 512, and adjuster 512 is used for when electrokinetic cell 3 disconnects and DC-DC converter 4 Connection when, the first Regulate signal and the second Regulate signal are exported according to the output signal of mu balanced circuit 300, so that inverter The DC bus-bar voltage of 511 outputs keeps stable, wherein, the first Regulate signal is used to adjust the d shaft currents of auxiliary-motor 5 Section, the second Regulate signal are used to the q shaft currents of auxiliary-motor 5 be adjusted.
Further, in certain embodiments, as shown in Figure 10, mu balanced circuit 300 includes the He of first voltage sampler 61 Target voltage collector 62.The DC bus-bar voltage that first voltage sampler 61 exports to inverter 511 is sampled to obtain First voltage sampled value, and first voltage sampled value is exported to adjuster 512, target voltage collector 62 and obtains object reference Voltage, and target reference voltage is sent to adjuster 512.Adjuster 512 is used for according to target reference voltage and first voltage Voltage difference between sampled value exports the first Regulate signal and the second Regulate signal.Wherein, the output signal of mu balanced circuit 300 Including first voltage sampled value and target reference voltage.
Specifically, auxiliary-motor controller 51 is connected by mu balanced circuit 300 with DC-DC converter 4.Auxiliary-motor controller 51 export DC bus-bar voltage, the DC bus-bar voltage that first voltage sampler 61 exports to inverter 511 by inverter 511 Sampled to obtain first voltage sampled value, and first voltage sampled value is exported to adjuster 512.Target voltage collector 62 obtain target reference voltage, and target reference voltage is sent to adjuster 512, and adjuster 512 is according to target reference voltage Voltage difference between first voltage sampled value exports the first Regulate signal and the second Regulate signal, passes through the first Regulate signal The d shaft currents of auxiliary-motor 5 are adjusted, the q shaft currents of auxiliary-motor 5 are adjusted by the second Regulate signal, so as to pair Electric machine controller 51 is when electrokinetic cell 3 disconnects and is connected with DC-DC converter 4 according to the d shaft currents and q shaft currents of auxiliary-motor 5 Inverter 511 is controlled, the DC bus-bar voltage for exporting inverter 511 keeps stable.
In some instances, PWM (Pulse Width Modulation, pulse modulation technology) can be used to inverter 511 are controlled, so that the DC bus-bar voltage that inverter 511 exports keeps stable.As shown in figure 11, adjuster 512 includes Error calculation unit a, the first PID adjustment units b and the 2nd PID adjustment units c.
Wherein, error calculation unit a is connected with first voltage sampler 61 and target voltage collector 62 respectively, error meter Unit a is calculated to obtain the voltage difference between target reference voltage and first voltage sampled value.First PID adjustment units b with Error calculation unit a is connected, and the first PID adjustment units b is to the voltage difference between target reference voltage and first voltage sampled value Value is adjusted to export the first Regulate signal.2nd PID adjustment units c is connected with error calculation unit a, the 2nd PID regulations Unit c the voltage difference between target reference voltage and first voltage sampled value is adjusted to export the second Regulate signal.
Specifically, as shown in figure 11, the DC bus-bar voltage that first voltage sampler 61 exports to inverter 511 in real time enters Row sampling is exported first voltage sampled value to Error Calculator a, target voltage collector with obtaining first voltage sampled value 62 obtain target reference voltage, and target reference voltage is exported to error calculation unit a.Error calculation unit a obtains target Voltage difference between reference voltage and first voltage sampled value, and the difference is separately input into the first PID adjustment units b With the 2nd PID adjustment unit c, the first Regulate signal (i.e. Id in Figure 11 is exported by the first PID adjustment units b*) and pass through 2nd PID adjustment units c exports the second Regulate signal (i.e. Iq in Figure 11*).Now, the three-phase current warp that auxiliary-motor 5 exports D shaft current Id and q the shaft current Iq being changed into after 3S/2R conversion under dq coordinate systems, obtain Id respectively*With Id, Iq*It is poor between Iq Value, and by corresponding PID regulator difference is controlled respectively to obtain the α shaft voltage U α of auxiliary-motor 5 and auxiliary-motor 5 β shaft voltage U β；U α and U β are inputed into SVPWM modules, three-phase dutycycle is exported, inverter 511 is carried out by the dutycycle Control, d shaft current Id and q the shaft current Iq of the output of auxiliary-motor 5 are adjusted by inverter 511, and then pass through the first control signal The d shaft currents of the auxiliary-motor after adjustment are adjusted again, the q shaft currents of auxiliary-motor entered again by the second Regulate signal Row regulation.Thus, the closed-loop control to auxiliary-motor d shaft currents and q shaft currents is formed, inverter can be made by the closed-loop control The DC bus-bar voltage of 511 outputs keeps stable, i.e., is exported when auxiliary-motor 5 generates electricity to the DC voltage holding of DC-DC converter 4 It is stable.
It should be noted that DC voltage and auxiliary-motor 5 output that inverter 511 exports in auxiliary-motor controller 51 is anti- Electromotive force has certain correlation, and to ensure control efficiency, the voltage that inverter 511 exports can be set to 3/2 phase voltage When driving condition (i.e. maximum phase voltage be the 2/3 of DC bus-bar voltage).Thus, the DC voltage that inverter 511 exports and pair The rotating speed of motor 5 is in certain relation, and when the rotating speed of auxiliary-motor 5 is higher, the DC voltage that inverter 511 exports is higher, 5 turns of auxiliary-motor Speed is lower, and the DC voltage that inverter 511 exports is lower.
Further, in order to which the DC voltage that ensures to input DC-DC converter 4 is in predeterminated voltage section, in this practicality newly In some embodiments of type, as shown in Figure 10, mu balanced circuit 300 can also include voltage-stablizer 63, the and of second voltage sampler 64 Voltage-stabilizing controller 65.
Wherein, voltage-stablizer 63 is connected to the DC output end of inverter 511, and voltage-stablizer 63 exports straight to inverter 511 Flow busbar voltage and carry out voltage stabilizing processing, the input of the output end connection DC-DC converter 4 of voltage-stablizer 63.Second voltage samples Device 64 is sampled to the output voltage of voltage-stablizer 63 to obtain second voltage sampled value.Voltage-stabilizing controller 65 respectively with voltage-stablizer 63 are connected with second voltage sampler 64, and voltage-stabilizing controller 65 is used for according to predetermined reference voltage and second voltage sampled value to steady The output voltage of depressor 63 is controlled such that the output voltage of voltage-stablizer 63 is in predeterminated voltage section.
In some instances, voltage-stablizer 63 can use switching mode mu balanced circuit, and such as BOOST booster circuits, it can not only Enough boostings, and control accuracy is high.Wherein, switching device can use silicon carbide MOSFET, such as Infineon in BOOST booster circuits IMW120R45M1, can pressure-resistant 1200V, the characteristics of internal resistance is 45m Ω, has high pressure, and internal resistance is small, and heat conductivility is good, than The High Speed I GBT losses of same specification want small several ten times.The driving chip of voltage-stablizer 63 can use Infineon 1EDI60N12AF, it uses no core transformer to isolate, and control is safe and reliable.It is appreciated that the driving chip can produce driving letter Number.
In other examples, voltage-stablizer 63 can use the BUCK-BOOST circuits of buck-boost type, and it can be at a high speed When be depressured, boost during low speed, and control accuracy is high.
In other example, voltage-stablizer 63 can also use linear voltage-stabilizing circuit or three-terminal voltage-stabilizing circuit (such as LM317 With 7805 etc.).
It is appreciated that for ease of circuit design, the circuit structure of first voltage sampler 61 and second voltage sampler 64 It can be identical.For example, first voltage sampler 61 and second voltage sampler 64 may each comprise differential voltage circuit, its It is high with precision, and the characteristics of convenient adjustment multiplication factor.
Alternatively, voltage-stabilizing controller 65 can use PWM dedicated modulation chip SG3525, and it has small volume, control letter Singly, the characteristics of stable PWM ripples can be exported.
For example, the workflow of the dynamical system of above-mentioned hybrid vehicle is：Second voltage sampler 64 is to steady The output voltage of depressor 63 is sampled to obtain second voltage sampled value, and second voltage sampled value is exported to chip SG3525, chip SG3525 can set reference voltage, and reference voltage and second voltage sampled value are compared, in conjunction with Triangular wave caused by chip SG3525 can generate the PWM ripples of two-way, voltage-stablizer 63 is controlled by two-way PWM ripples with Voltage-stablizer 63 is exported to the voltage of DC-DC converter 4 and be in predeterminated voltage section, such as 11-13V, thereby, it is possible to ensure to mix The normal work of power vehicle mesolow load.
It should be noted that if the DC bus-bar voltage of output is too low, second voltage sampled value is with regard to very little, then SG3525 The bigger PWM ripples of duty can be sent, to be boosted.
Thus, auxiliary-motor 5 and DC-DC converter 4 have independent voltage stabilizing supplying channels all the way, when electrokinetic cell 3 breaks down, , can be by auxiliary-motor 5 and the independent voltage stabilizing supplying channels of DC-DC converter 4 when disconnecting with the connection of DC-DC converter 4, can be with Ensure the low pressure electricity consumption of vehicle, it is ensured that vehicle can realize pure fuel oil pattern traveling, improve vehicle distance travelled.
In a specific embodiment of the present utility model, as shown in figure 12, electrokinetic cell 3 damages, disconnection and DC-DC During the connection of converter 4, mu balanced circuit 300 is connected to the end of incoming cables of DC-DC converter 4.
Wherein, power motor 2 also includes second controller 21, and auxiliary-motor controller 51 is connected with second controller 21, and It is connected by mu balanced circuit 300 with DC-DC converter 4.Auxiliary-motor 5 produces alternating current when generating electricity, and inverter 511 can be by auxiliary-motor Convert alternating current caused by 5 generatings is high voltage direct current such as 600V high voltage direct currents, to realize to power motor 2, DC-DC At least one power supply in converter 4.
It is appreciated that second controller 21 can have DC-AC converter units, DC-AC converter units can be by inverter 511 The high voltage direct current of output is transformed to alternating current, to be charged to power motor 4.
Specifically, as shown in figure 12, the inverter 511 of auxiliary-motor controller 51 has the first DC terminal DC1, the second control Device 21 has the second DC terminal DC2, and DC-DC converter 4 has the 3rd DC terminal DC3.First direct current of auxiliary-motor controller 51 End DC1 is connected by mu balanced circuit 300 with the 3rd DC terminal DC3 of DC-DC converter 4, to be provided surely to DC-DC converter 4 Determine voltage, and DC-DC converter 4 can carry out DC-DC conversion to the direct current after voltage stabilizing.Also, auxiliary-motor controller 51 is inverse Becoming device 511 can also be powered by the first DC terminal DC1 output high voltage direct currents to second controller 21 to power motor 2.
Further, as shown in figure 12, DC-DC converter 4 also respectively with the electric equipment 10 in hybrid vehicle and Low tension battery 20 is connected to be powered to electric equipment 10 and low tension battery 20, and low tension battery 20 also with electric equipment 10 It is connected.
Specifically, as shown in figure 12, DC-DC converter 4 also has the 4th DC terminal DC4, and DC-DC converter 4 can be by pair The high voltage direct current that motor 5 is exported by auxiliary-motor controller 51 is converted to low-voltage DC, and passes through the 4th DC terminal DC4 Export the low-voltage DC.4th DC terminal DC4 of DC-DC converter 4 is connected with electric equipment 10, thinks that electric equipment 10 supplies Electricity, wherein, electric equipment 10 can be low voltage equipment, and it includes but is not limited to car light, radio etc..DC-DC converter 4 The 4th DC terminal DC4 can also be connected with low tension battery 20, think that low tension battery 20 charges.Low tension battery 20 and electrical equipment Equipment 10 is connected, and to be powered to electric equipment 10, especially, when auxiliary-motor 5 stops generating electricity, low tension battery 20 can be electrical equipment Equipment 10 is powered, so as to ensure the low pressure electricity consumption of vehicle, it is ensured that vehicle can realize pure fuel oil pattern traveling, improve in vehicle traveling Journey.
It should be noted that in the utility model embodiment, low pressure can refer to 12V (volt) or 24V voltage, and high pressure can refer to 600V voltage, predeterminated voltage section can refer to 11~13V or 23~25V, but not limited to this.
To sum up, the dynamical system of the hybrid vehicle of the utility model embodiment, vehicle low speed can not only be maintained electric Balance and low speed ride comfort, additionally it is possible to ensure DC- when disconnecting the connection with DC-DC converter in electrokinetic cell failure or damage DC converter normal works, and control accuracy is high, loss is small.
In addition, the utility model embodiment also proposed a kind of hybrid vehicle.
Figure 13 is the block diagram according to the hybrid vehicle of the utility model embodiment.As shown in figure 13, mix Power vehicle 200 includes the dynamical system 100 of the hybrid vehicle of above-described embodiment.
The hybrid vehicle proposed according to the utility model embodiment, is able to maintain that vehicle low speed electric equilibrium and low speed are put down It is pliable.
Hybrid vehicle and its dynamical system based on above-described embodiment, the utility model embodiment also propose a kind of mixed Close the electricity-generating control method of power vehicle.
Figure 14 is the flow chart according to the electricity-generating control method of the hybrid vehicle of the utility model embodiment.Such as Figure 14 It is shown, the electricity-generating control method of hybrid vehicle, comprise the following steps：
S1：Obtain the SOC value of electrokinetic cell and the SOC value of low tension battery of hybrid vehicle.
, wherein it is desired to explanation, can pass through the SOC value of the battery management system collection electrokinetic cell of hybrid vehicle With the SOC value of low tension battery, to obtain the SOC value of the SOC value of electrokinetic cell and low tension battery.
S2：Obtain the maximum allowable generated output of the auxiliary-motor of hybrid vehicle.
According to a specific example of the present utility model, maximum allowable generated output and auxiliary-motor and the engine of auxiliary-motor The correlation such as performance parameter, in other words, the maximum allowable generated output of auxiliary-motor can join according to the performance of auxiliary-motor and engine The preset in advance such as number.
S3：Sentenced according to the maximum allowable generated output of the SOC value of electrokinetic cell, the SOC value of low tension battery and auxiliary-motor Whether disconnected auxiliary-motor charges to electrokinetic cell and/or low tension battery.
Thus, by power battery charging, it can be ensured that the power demand of power motor and high-voltage electrical equipment, and then really Power motor driving vehicle normally travel is protected, also, by being charged to low tension battery, it can be ensured that the electricity consumption of low voltage equipment Demand, and can realize that vehicle is low by low tension battery when auxiliary-motor stops generating and electrokinetic cell failure or not enough power supply Pressure power supply, and then ensure that vehicle can realize pure fuel oil pattern traveling, improve vehicle distance travelled.
Further, according to one embodiment of the present utility model, when the SOC value of electrokinetic cell is less than the first default SOC Value and when the SOC value of low tension battery is more than or equal to the second default SOC value, controls the secondary electricity of driven by engine of hybrid vehicle Machine is generated electricity with to power battery charging.
Wherein, it should be appreciated that the first default SOC value can be the charging limit value of electrokinetic cell, and second presets SOC Value can be the charging limit value of low tension battery, and the first default SOC value and the second default SOC value can each batteries itself successively Performance is independently arranged.
Specifically, after the SOC value and the SOC value of low tension battery for getting electrokinetic cell, it can determine whether power electric Whether the SOC value in pond is less than the first default SOC value, and judges whether the SOC value of low tension battery is less than the second default SOC values, If the SOC value of electrokinetic cell is less than the first default SOC value and the SOC value of low tension battery is more than or equal to the second default SOC value, The dump energy that then illustrates electrokinetic cell is relatively low, needs to charge, and the dump energy of low tension battery it is higher, without charging, this When control module control driven by engine auxiliary-motor generated electricity with to power battery charging.
As it was previously stated, auxiliary-motor belongs to high-voltage motor, for example, the generating voltage of auxiliary-motor and the voltage of electrokinetic cell it is suitable, So as to which electric energy caused by auxiliary-motor can be without voltage transformation directly to power battery charging.
Similarly, the SOC value that the first default SOC value and low tension battery are more than or equal to when the SOC value of electrokinetic cell is less than During the second default SOC value, the driven by engine auxiliary-motor of hybrid vehicle is controlled to be generated electricity to pass through hybrid vehicle DC-DC converter give low tension battery charging.
That is, if the SOC value of electrokinetic cell is more than or equal to the first default SOC value and the SOC value of low tension battery Less than the second default SOC value, then illustrate that the dump energy of electrokinetic cell is higher, need not charge, and the residue electricity of low tension battery Measure it is relatively low, need to charge, now control module control driven by engine auxiliary-motor generated electricity with by DC-DC converter to low Press battery charging.
As it was previously stated, auxiliary-motor belongs to high-voltage motor, for example, the generating voltage of auxiliary-motor and the voltage of electrokinetic cell it is suitable, So as to which electric energy caused by auxiliary-motor need to charge to low tension battery again after DC-DC converter carries out voltage transformation.
Further, according to one embodiment of the present utility model, preset when the SOC value of electrokinetic cell is less than first When SOC values and the SOC value of low tension battery are less than the second default SOC value, electrokinetic cell is obtained according to the SOC value of electrokinetic cell Charge power, and obtain according to the SOC value of low tension battery the charge power of low tension battery, and filling in electrokinetic cell When electrical power and the charge power sum of low tension battery are more than the maximum allowable generated output of auxiliary-motor, hybrid power vapour is controlled The driven by engine auxiliary-motor of car is generated electricity to be charged by the DC-DC converter of hybrid vehicle to low tension battery.
Also, when the charge power of electrokinetic cell and the charge power sum of low tension battery are less than or equal to auxiliary-motor most During big permission generated output, control driven by engine auxiliary-motor is generated electricity to become to power battery charging, while by DC-DC Parallel operation charges to low tension battery.
That is, if the SOC value of electrokinetic cell is less than the first default SOC value and the SOC value of low tension battery is less than Second default SOC value, then illustrate that the dump energy of electrokinetic cell and low tension battery is relatively low, need to charge, now further Judge whether the charge power of electrokinetic cell and the charge power sum of low tension battery are more than the maximum allowable generating of auxiliary-motor Power.
If the charge power of electrokinetic cell and the charge power sum of low tension battery are more than the maximum allowable of auxiliary-motor Generated output, then illustrate that the electric energy that auxiliary-motor can be generated is not enough to two batteries while charged, now preferentially give low pressure Battery charges, that is, controls driven by engine auxiliary-motor to be generated electricity to be charged by DC-DC converter to low tension battery.
If the charge power of electrokinetic cell and the charge power sum of low tension battery are less than or equal to the maximum of auxiliary-motor Allow generated output, then illustrate that electric energy that auxiliary-motor can be generated to two batteries while can charge, now while give power Battery and low tension battery charging, that is, control driven by engine auxiliary-motor to be generated electricity to power battery charging, to pass through simultaneously DC-DC converters charge to low tension battery.
Thus, by preferentially being charged to low tension battery, the power demand of low voltage equipment, Jin Erke can preferentially be ensured Ensure that vehicle realizes pure fuel oil pattern traveling in electrokinetic cell not enough power supply, improve vehicle distance travelled.
However, it is to be understood that when the SOC value of electrokinetic cell is more than or equal to the first default SOC value and low tension battery SOC value when being more than or equal to the second default SOC value, illustrate that the dump energy of electrokinetic cell and low tension battery is higher, need not Charging, electrokinetic cell and low tension battery can not now be charged.
Specifically, as shown in figure 15, the electricity-generating control method of the hybrid vehicle of the utility model embodiment is specific Comprise the following steps：
S101：Obtain the SOC value of electrokinetic cell and the SOC value of low tension battery.
S102：Judge whether the SOC value of electrokinetic cell is less than the first default SOC value.
If it is, perform step S105；If it is not, then perform step S103.
S103：Judge whether the SOC value of low tension battery is less than the second default SOC value.
If it is, perform step S104；If it is not, then return to step S101.
S104：Charged to low tension battery, that is, control driven by engine auxiliary-motor to be generated electricity to pass through DC-DC converter Charged to low tension battery.
S105：Judge whether the SOC value of low tension battery is less than the second default SOC value.
If it is, perform step S107；If it is not, then perform step S106.
S106：To power battery charging, that is, driven by engine auxiliary-motor is controlled to be generated electricity with to power battery charging.
S107：Obtain the charge power of electrokinetic cell and the charge power of low tension battery.
S108：Judge whether the charge power of electrokinetic cell and the charge power sum of low tension battery are more than auxiliary-motor Maximum allowable generated output.
If it is, perform step S109；If it is not, then perform step S110.
S109：Preferentially charged to low tension battery, that is, control driven by engine auxiliary-motor to be generated electricity to become by DC-DC Parallel operation charges to low tension battery.
S110：Charged simultaneously to electrokinetic cell and low tension battery, that is, control driven by engine auxiliary-motor to be generated electricity with Charged to power battery charging, while by DC-DC converter to low tension battery.
To sum up, the electricity-generating control method of the hybrid vehicle proposed according to the utility model embodiment, according to power electric Whether the maximum allowable generated output of the SOC value in pond, the SOC value of low tension battery and motor judges auxiliary-motor to electrokinetic cell And/or low tension battery is charged, so that this method may be either power battery charging, or low tension battery charging, from And the power demand of power motor and high-voltage electrical equipment is can ensure that, and then ensure that power motor drives vehicle normally travel, and And the power demand of low voltage equipment is can ensure that, and then generating and electrokinetic cell failure or not enough power supply can be stopped in auxiliary-motor When, it is ensured that vehicle can realize pure fuel oil pattern traveling, improve vehicle distance travelled.
Hybrid vehicle and its dynamical system based on above-described embodiment, the utility model embodiment also propose another kind The electricity-generating control method of hybrid vehicle.
Figure 16 is the flow chart according to the electricity-generating control method of the hybrid vehicle of the utility model embodiment.Such as Figure 16 Shown, the electricity-generating control method of hybrid vehicle comprises the following steps：
S10：Obtain the SOC value of electrokinetic cell and the speed of hybrid vehicle.
It should be noted that the SOC value of electrokinetic cell can be gathered by the battery management system of hybrid vehicle, so that Obtain the SOC value of electrokinetic cell.
S20：Auxiliary-motor is controlled to be adjusted into generated output according to the SOC value of electrokinetic cell and the speed of hybrid vehicle Pattern, so that engine operates in default optimal economic region.
It should be noted that the default optimal economic region that engine's fuel consumption characteristics loop image determines engine can be combined. As Fig. 7 show an example of engine's fuel consumption characteristics loop image, wherein, side ordinate is the output torque of engine, horizontal Coordinate is the rotating speed of engine, and curve a is the fuel-economy curve of engine.Region corresponding to fuel-economy curve is to start The optimal economic region of machine, that is, say when the torque of engine and moment of torsion are located on the fuel-economy curve of engine optimum, send out Motivation is in optimal economic region.Thus, in the utility model embodiment, can be turned round by the rotating speed and output for controlling engine Square falls in engine fuel economic curve for example on curve a, so that engine operates in default optimal economic region.
Further, according to one embodiment of the present utility model, during the traveling of hybrid vehicle, obtain dynamic The SOC value of power battery and the vehicle velocity V of hybrid vehicle, and according to the SOC value of electrokinetic cell and the vehicle velocity V of hybrid vehicle Control auxiliary-motor enters generated output shaping modes, so that engine operates in default optimal economic region.Wherein, generating work( Rate shaping modes are the pattern that the generated output of engine is adjusted, and in generated output shaping modes, can pass through control Engine 1 is driven auxiliary-motor 5 to be generated electricity and is adjusted with the generated output to auxiliary-motor 5.
Specifically, during hybrid electric vehicle is sailed, engine can output power to mixing by clutch The wheel of power vehicle, and engine can also drive auxiliary-motor to be generated electricity.Thus, the power output of engine mainly includes Two parts, part output is to auxiliary-motor, that is, the power that drives auxiliary-motor to be generated electricity, and another part is output to wheel, i.e., The power of driving moment.
When driven by engine auxiliary-motor is generated electricity, the SOC value and hybrid vehicle of electrokinetic cell can be obtained first Speed, then according to the SOC value of electrokinetic cell and the speed of hybrid vehicle control auxiliary-motor enter generated output regulation Pattern, so that engine is operated in default optimal economic region.In generated output shaping modes, engine can be operated in The generated output of auxiliary-motor is adjusted on the premise of default optimal economic region.
Thereby, it is possible to make engine be operated in default optimal economic region, because engine is in default optimal economic The oil consumption in region is minimum, fuel economy highest, so as to reduce the oil consumption of engine, reduces the noise of engine, improves whole The economy of car operation.Auxiliary-motor has higher generated output and generating efficiency when being additionally, since low speed, so as to meet The power demand run at a low speed, vehicle low speed electric equilibrium can be maintained, maintain vehicle low speed ride comfort, lift the dynamic property of vehicle Energy.Wherein, by power battery charging, it can be ensured that the power demand of power motor and high-voltage electrical equipment, and then ensure to move Force motor drives vehicle normally travel.
Further, according to one embodiment of the present utility model, when the SOC value of electrokinetic cell is more than default limiting value And when being less than or equal to the first preset value, if the vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed, control auxiliary-motor enters Enter generated output shaping modes.
Wherein, the first preset value can be the upper bound limit value of the SOC value of the electrokinetic cell pre-set, for example, stop charging Decision content, be preferably 30%.Default limiting value can be the lower bound limit value of the SOC value of the electrokinetic cell pre-set, example It is preferably 10% such as to stop the decision content of electric discharge.Can be by electrokinetic cell according to the first preset value and default limiting value SOC value is divided into three sections, i.e. the first electricity section, the second electricity section and the 3rd electricity section, as the SOC of electrokinetic cell When value is less than or equal to default limiting value, the SOC value of electrokinetic cell is in the first electricity section, and now electrokinetic cell only charges Do not discharge；When the SOC value of electrokinetic cell is more than default limiting value and is less than or equal to the first preset value, electrokinetic cell SOC value is in the second electricity section, and now electrokinetic cell has charge requirement, you can actively to power battery charging；Work as power When the SOC value of battery is more than the first preset value, the SOC value of electrokinetic cell is in the 3rd electricity section, and now electrokinetic cell can not Charging, i.e., will not actively give power battery charging.
Specifically, after the SOC value and the vehicle velocity V of hybrid vehicle for obtaining electrokinetic cell, it can determine whether power electric Section residing for the SOC value in pond, if the SOC value of electrokinetic cell is in middle electricity section, the SOC value of electrokinetic cell, which is more than, to be preset Limiting value and be less than or equal to the first preset value, then explanation electrokinetic cell can be charged, now determine whether to mix Whether the vehicle velocity V of power vehicle is less than the first preset vehicle speed V1, if the vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed V1, then control auxiliary-motor enter generated output shaping modes, now the speed of hybrid vehicle is relatively low, required driving force compared with Few, power motor is enough to drive hybrid electric vehicle to sail, and engine only can drive auxiliary-motor to be generated electricity, and be not involved in driving.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
Further, according to one embodiment of the present utility model, when the SOC value of electrokinetic cell is more than default limiting value M2 and when vehicle velocity V less than or equal to the first preset value M1 and hybrid vehicle is less than the first preset vehicle speed V1, also obtains and mixes The vehicle demand power P2 of power vehicle is closed, and is less than or equal to the maximum allowable generated output of auxiliary-motor in vehicle demand power P2 During Pmax, control auxiliary-motor enters generated output shaping modes.
Specifically, during the traveling of hybrid vehicle, if the SOC value of electrokinetic cell is more than the default limit Value M2 and vehicle velocity V less than or equal to the first preset value M1 and hybrid vehicle is less than the first preset vehicle speed V1, that is, mix The speed of power vehicle is relatively low, then obtains the vehicle demand power P2 of hybrid vehicle, and is less than in vehicle demand power P2 Equal to auxiliary-motor maximum allowable generated output Pmax when, control auxiliary-motor enter generated output shaping modes.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
Further, according to one embodiment of the present utility model, when the SOC value of electrokinetic cell is more than the default limit It is worth and is less than the first preset vehicle speed V1 and vehicle demand power less than or equal to the first preset value M1, the vehicle velocity V of hybrid vehicle P2 be less than or equal to auxiliary-motor maximum allowable generated output Pmax when, also obtain hybrid vehicle gas pedal depth D and The vehicle resistance F of hybrid vehicle, and it is less than or equal to the first predetermined depth D1 and hybrid vehicle in gas pedal depth D Vehicle resistance F when being less than or equal to the first default resistance F1, control auxiliary-motor enters generated output shaping modes.
It should be noted that the car resistance that the vehicle resistance of hybrid vehicle can be hybrid vehicle for example rolls Resistance, acceleration resistance, grade resistance and air drag etc..
Specifically, if the SOC value of electrokinetic cell is more than default limiting value and is less than or equal to the first preset value M1, mixes The vehicle velocity V for closing power vehicle is less than or equal to the maximum allowable of auxiliary-motor less than the first preset vehicle speed V1 and vehicle demand power P2 Generated output Pmax, then the gas pedal depth D of hybrid vehicle and the vehicle resistance F of hybrid vehicle are obtained in real time, The vehicle resistance F for being less than or equal to the first predetermined depth D1 and hybrid vehicle as gas pedal depth D is pre- less than or equal to first During handicapping power F1, illustrate that hybrid vehicle operates in low-speed mode, control auxiliary-motor enters generated output shaping modes.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
As above, when hybrid vehicle is run at a low speed, engine 1 can only generate electricity and be not involved in driving, due to engine not Driving is participated in, clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving easypro Adaptive, also, engine is operated in economic zone in low speed, due to oil consumption of the engine in default optimal economic region Minimum, fuel economy highest, so as to reduce oil consumption, engine noise is reduced, the economy of vehicle operation is improved, so as to tie up Vehicle low speed electric equilibrium and low speed ride comfort are held, lifts vehicle performance.
Correspondingly, when hybrid vehicle electrokinetic cell SOC value, vehicle velocity V, gas pedal depth D and vehicle resistance When F is unsatisfactory for above-mentioned condition, engine may participate in driving, and its specific work process is as follows.
According to one embodiment of the present utility model, it is less than default limiting value in the SOC value of electrokinetic cell or mixing is dynamic The speed of power automobile is more than or equal to the first preset vehicle speed or vehicle demand power is more than the maximum allowable generating work(of auxiliary-motor Rate or gas pedal depth are more than the first predetermined depth or the vehicle resistance of hybrid vehicle is more than the first pre- handicapping During power, control engine participates in driving.
That is, the SOC value in electrokinetic cell is big less than the speed of default limiting value M2 or hybrid vehicle In the maximum allowable generated output or gas pedal that are more than auxiliary-motor equal to the first preset vehicle speed or vehicle demand power When depth is more than the vehicle resistance of the first predetermined depth or hybrid vehicle more than the first default resistance, engine is controlled Driving is participated in, now, electrokinetic cell no longer discharges, the driving force needed for vehicle is larger, vehicle demand power is larger, gas pedal Depth is larger or vehicle resistance is also larger, power motor be not enough to drive hybrid electric vehicle sail, engine participate in driving with Carry out supplying driving.
Thus, engine can participate in driving in the driving force deficiency that power motor exports, so that it is guaranteed that the normal row of vehicle Sail, improve the power performance of vehicle, improve the distance travelled of vehicle.
More specifically, when vehicle demand power is more than the maximum allowable generated output of auxiliary-motor, engine ginseng is also controlled With driving so that engine outputs power to wheel by clutch.
Also, when the SOC value of electrokinetic cell is less than or equal to default limiting value M2, also control engine participate in driving with Engine is set to output power to wheel by clutch；When the SOC value of electrokinetic cell is less than or equal to the first preset value M1, mixing When the vehicle velocity V of power vehicle is less than the first preset vehicle speed V1 and gas pedal depth D and is more than the first predetermined depth D1, also control is sent out Motivation participates in driving so that engine outputs power to wheel by clutch；When the SOC value of electrokinetic cell is less than or equal to the One preset value M1, the vehicle velocity V of hybrid vehicle are less than the first preset vehicle speed V1 and the vehicle resistance F of hybrid vehicle is more than During the first default resistance F1, engine is also controlled to participate in driving so that engine outputs power to wheel by clutch.
Specifically, generated electricity in driven by engine auxiliary-motor and power motor outputs driving force to hybrid vehicle Wheel when, obtain the SOC value of electrokinetic cell, gas pedal depth D, vehicle velocity V and the vehicle resistance of hybrid vehicle in real time F, and SOC value, the gas pedal depth D of hybrid vehicle, vehicle velocity V and the vehicle resistance F to electrokinetic cell judge, and The generated output of auxiliary-motor is adjusted according to following three kinds of judged results：
First, when the SOC value of electrokinetic cell is less than default limiting value M2, control engine is by clutch by power Wheel is output to, so that engine and power motor simultaneously participate in driving, reduces the load of power motor to reduce electrokinetic cell Power consumption, so as to ensure that engine is operated in default optimal economic region, while avoid the SOC value of electrokinetic cell fast Speed declines.
Second, when the SOC value of electrokinetic cell is less than or equal to the first preset value M1, the vehicle velocity V of hybrid vehicle is less than the One preset vehicle speed V1 and when gas pedal depth D is more than the first predetermined depth D1, control engine is defeated by power by clutch Go out to wheel, so that engine and power motor simultaneously participate in driving, reduce the load of power motor to reduce electrokinetic cell Power consumption, so as to ensure that engine is operated in default optimal economic region, while avoid the SOC value of electrokinetic cell quick Decline.
Third, when the SOC value of electrokinetic cell is less than or equal to the first preset value M1, the vehicle velocity V of hybrid vehicle is less than the When the resistance F of one preset vehicle speed V1 and hybrid vehicle is more than the first default resistance F1, control engine will by clutch Power output is to wheel, so that engine and power motor simultaneously participate in driving, reduces the load of power motor to reduce power The power consumption of battery, so as to ensure that engine is operated in default optimal economic region, while avoid electrokinetic cell SOC value rapid decrease.
Thus, engine can participate in driving in the driving force deficiency that power motor exports, so that it is guaranteed that the normal row of vehicle Sail, improve the power performance of vehicle, improve the distance travelled of vehicle.Also, controllable engine is operated in economic zone, Because oil consumption of the engine in default optimal economic region is minimum, fuel economy highest, so as to reduce oil consumption, hair is reduced Motivation noise, improve vehicle economic performance.
In addition, when the SOC value of electrokinetic cell is less than or equal to default limiting value, and the speed of hybrid vehicle is more than the During one preset vehicle speed, control engine participates in driving so that engine outputs power to wheel by clutch.
Thus, engine can participate in driving in the driving force deficiency that power motor exports, so that it is guaranteed that the normal row of vehicle Sail, improve the power performance of vehicle, improve the distance travelled of vehicle.
However, it is to be understood that when the SOC value of electrokinetic cell is more than the first preset value, engine does not drive secondary electricity Machine is generated electricity, and now the electricity of electrokinetic cell is close to full electricity, and without charging, engine does not drive auxiliary-motor to be generated electricity. That is when the electricity of electrokinetic cell is close full electric, engine does not drive auxiliary-motor to be generated electricity, so as to which auxiliary-motor is not to dynamic Power battery charges.
Furthermore, after auxiliary-motor enters generated output shaping modes, the generated output of auxiliary-motor can be adjusted Save, the generated output regulation process to the utility model embodiment is specifically described below.
It is dynamic according to mixing after auxiliary-motor enters generated output shaping modes according to one embodiment of the present utility model The generated output P1 of auxiliary-motor is adjusted by the vehicle demand power P2 of power automobile and the charge power P3 of electrokinetic cell.
According to one embodiment of the present utility model, according to the vehicle demand power P2 and electrokinetic cell of hybrid vehicle Charge power P3 regulation auxiliary-motor generated output P1 formula it is as follows：
P1=P2+P3, wherein, P2=P11+P21,
P1 is the generated output of auxiliary-motor, and P2 is vehicle demand power, and P3 is the charge power of electrokinetic cell, and P11 is whole Car driving power, P21 are electric equipment power.
It should be noted that electric equipment includes the first electric equipment and the second electric equipment, i.e. electric equipment power P 21 It may include high-voltage electrical equipment and the power needed for low voltage equipment.
It should be noted that vehicle driving power P11 may include the power output of power motor 2, vehicle driving power P11 It may include the power output of power motor, can be according to the rotating speed of the default throttle-torque curve and power motor of power motor Vehicle driving power P11 is obtained, wherein, default throttle-torque curve can be determined when hybrid electric vehicle power matches. In addition, electric equipment power P 21 can be obtained in real time according to the electric equipment that vehicle is run, such as counted by DC consumption in bus Calculate electric equipment power P 21.In addition, the charge power P3 of electrokinetic cell can be obtained according to the SOC value of electrokinetic cell.Assuming that in real time The vehicle driving power P11=b1kw of acquisition, electric equipment power P 21=b2kw, the charge power P3=of electrokinetic cell B3kw, then auxiliary-motor generated output=b1+b2+b3.
Specifically, during hybrid electric vehicle is sailed, charge power P3, the vehicle driving of electrokinetic cell can be obtained Power P 11 and electric equipment power P 21, and by the charge power P3, vehicle driving power P11 and electric equipment work(of electrokinetic cell Generated output P1 of the rate P21 sums as auxiliary-motor, thus, the generated output of auxiliary-motor can be carried out according to the P1 values calculated Regulation, such as the output torque and rotating speed of engine can be controlled according to the P1 values calculated, with to driven by engine pair The power that motor is generated electricity is adjusted.
Further, according to one embodiment of the present utility model, the generated output of auxiliary-motor is adjusted, including： The SOC value rate of change of electrokinetic cell is obtained, and it is corresponding with the optimal economic region of engine according to vehicle demand power P2 The generated output of the SOC value rate of change regulation auxiliary-motor of relation and electrokinetic cell between minimum output power Pmin.
It should be appreciated that the SOC value rate of change of electrokinetic cell can be obtained according to the SOC value of electrokinetic cell, for example, often Individual time interval t gathers the SOC value of an electrokinetic cell, so can by the current SOC value of electrokinetic cell and previous SOC values it SOC value rate of change of difference and time interval the t ratio as electrokinetic cell 3.
Specifically, the optimal economic region of engine can be determined according to the universal characteristic curve of engine shown in Fig. 7, is entered And minimum output power Pmin corresponding to the optimal economic region of engine is obtained, it is determined that the optimal economic region pair of engine After the minimum output power Pmin answered, you can corresponding most with the optimal economic region of engine according to vehicle demand power P2 The generated output of the SOC value rate of change regulation auxiliary-motor 5 of relation and electrokinetic cell between small power output Pmin.
Thus, when hybrid vehicle is run at a low speed, engine is operated in economic zone, oil consumption can be reduced, reduce Engine noise, the economic performance of vehicle is improved, also, in low speed, engine only generating can be not involved in driving, due to starting Machine is not involved in driving, and clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving Comfortableness, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.
It is described further below after auxiliary-motor enters generated output shaping modes, according to vehicle demand power P2 with starting The SOC value rate of change of relation and electrokinetic cell between minimum output power Pmin corresponding to the optimal economic region of machine is adjusted Save the specific regulative mode of the generated output of auxiliary-motor.
Specifically, generated electricity in driven by engine auxiliary-motor and power motor outputs driving force to hybrid vehicle Wheel when, obtain vehicle driving power P11 and electric equipment power P 21 in real time, needed with obtaining the vehicle of hybrid vehicle Power P 2 is sought, the vehicle demand power P2 of hybrid vehicle is judged, wherein, vehicle demand power P2 can meet following Three kinds of situations.
The first situation is：Vehicle demand power P2 is less than minimum output power corresponding to the optimal economic region of engine Pmin；Second of situation be：Vehicle demand power P2 is more than or equal to minimum output work corresponding to the optimal economic region of engine Rate Pmin and the maximum allowable generated output Pmax for being less than or equal to auxiliary-motor；The third situation is：Vehicle demand power P2 is more than The maximum allowable generated output Pmax of auxiliary-motor.
In one embodiment of the first situation, when vehicle demand power P2 is less than the optimal economic region pair of engine During the minimum output power Pmin answered, the charge power P3 of electrokinetic cell is obtained according to the SOC value rate of change of electrokinetic cell, and Judge whether the charge power P3 of electrokinetic cell is less than minimum output power Pmin and vehicle demand power P2 difference, wherein, If the charge power P3 of electrokinetic cell is less than minimum output power Pmin and vehicle demand power P2 difference, control is started Machine is generated electricity with minimum output power Pmin to adjust the generated output of auxiliary-motor；If the charge power P3 of electrokinetic cell More than or equal to minimum output power Pmin and vehicle demand power P2 difference, then according to the charge power P3 of electrokinetic cell with it is whole Car demand power P2 sums obtain power output of the engine in default optimal economic region, and control engine to obtain Power output generated electricity to adjust the generated output P1 of auxiliary-motor.
It should be noted that between the SOC value rate of change for the electrokinetic cell that can prestore and the charge power P3 of electrokinetic cell The first relation table, thus, obtain electrokinetic cell SOC value rate of change after, by compare the first relation table can obtain The charge power P3 of electrokinetic cell corresponding to taking.The SOC value rate of change of electrokinetic cell and the charge power P3 of electrokinetic cell expire Relation shown in sufficient table 1 below.
Table 1
The SOC value rate of change of electrokinetic cell 3 A1 A2 A3 A4 A5
The charge power P3 of electrokinetic cell 3 B1 B2 B3 B4 B5
As known to table 1, when the SOC value rate of change got is A1, the charging of the corresponding electrokinetic cell got Power P 3 is B1；When the SOC value rate of change got is A2, the charge power P3 of the corresponding electrokinetic cell got is B2；When the SOC value rate of change got is A3, the charge power P3 of the corresponding electrokinetic cell got is B3；When obtaining When the SOC value rate of change got is A4, the charge power P3 of the corresponding electrokinetic cell got is B4；When what is got When SOC value rate of change is A5, the charge power P3 of the corresponding electrokinetic cell got is B5.
Specifically, after auxiliary-motor enters generated output shaping modes, vehicle driving power P11 and electrical equipment are obtained in real time Plant capacity P21, to obtain the vehicle demand power P2 of hybrid vehicle, and to the vehicle demand power of hybrid vehicle P2 is judged.When vehicle demand power P2 is less than minimum output power Pmin corresponding to the optimal economic region of engine, The charge power P3 of electrokinetic cell can be obtained according to the SOC value rate of change of electrokinetic cell, and judge the charging work(of electrokinetic cell Whether rate P3 is less than minimum output power Pmin and vehicle demand power P2 difference.
When vehicle demand power P2 is less than minimum output power Pmin corresponding to the optimal economic region of engine, if Differences of the charge power P3 of electrokinetic cell less than minimum output power Pmin and vehicle demand power P2, i.e. P3 ＜ Pmin-P2, Then by controlling engine to be generated electricity with minimum output power Pmin to adjust the generated output of auxiliary-motor 1；If power Differences of the charge power P3 of battery more than or equal to minimum output power Pmin and vehicle demand power P2, i.e. P3 >=Pmin-P2, Engine is then obtained in default optimal economic region according to the charge power P3 of electrokinetic cell and vehicle demand power P2 sums Interior power output, and the power output by controlling engine to obtain is generated electricity to adjust the generated output of auxiliary-motor.
Thus, when vehicle demand power P2 is less than minimum output power Pmin corresponding to the optimal economic region of engine When, according to the charge power P3 of electrokinetic cell minimum output power Pmins corresponding with the optimal economic region of engine and vehicle The generated output of the Relation acquisition engine of demand power P2 difference, so that engine operates in default optimal economic region, And engine is only generated electricity and is not involved in driving, so as to reduce the oil consumption of engine, and the noise of engine is reduced.
In one embodiment of second of situation, when vehicle demand power P2 is more than or equal to the optimal economic area of engine Minimum output power Pmin corresponding to domain and less than or equal to auxiliary-motor maximum allowable generated output Pmax when, according to electrokinetic cell SOC value rate of change obtain the charge power P3 of electrokinetic cell, and according to the charge power P3 of electrokinetic cell and vehicle demand The sum of power P 2 obtains power output of the engine in default optimal economic region, and by controlling engine to obtain Power output generated electricity to adjust the generated output P1 of auxiliary-motor.
Specifically, when vehicle demand power P2 is more than or equal to minimum output work corresponding to the optimal economic region of engine Rate Pmin and less than auxiliary-motor maximum allowable generated output Pmax when, control engine be operated in default optimal economic SOC value rate of change during region always according to electrokinetic cell obtains the charge power P3 of electrokinetic cell, and according to electrokinetic cell Charge power P3 obtains power output of the engine in default optimal economic region with vehicle demand power P2 sums, its In, power output=P3+P2 of acquisition.And then engine is controlled to be generated electricity with the power output obtained to adjust auxiliary-motor Generated output P1 so that the SOC value increase of electrokinetic cell, and makes engine be operated in default optimal economic region.
Thus, when vehicle demand power P2 is more than or equal to minimum output power corresponding to the optimal economic region of engine Pmin and less than auxiliary-motor maximum allowable generated output Pmax when, according to the charge power P3 of electrokinetic cell and vehicle demand The sum of power P 2 obtains the power output of engine, so that engine operates in default optimal economic region, and engine is only Generated electricity and be not involved in driving, so as to reduce the oil consumption of engine, and reduce the noise of engine.
In one embodiment of the third situation, when vehicle demand power P2 is more than the maximum allowable generating work(of auxiliary-motor During rate Pmax, engine is also controlled to participate in driving so that engine outputs power to wheel by clutch.
Specifically, when the vehicle demand power P2 maximum allowable generated output Pmax for being more than auxiliary-motor are hybrid power vapour When the vehicle demand power P2 of car is higher than the generated output P1 of auxiliary-motor, also engine is controlled to be outputted driving force to by clutch Wheel is so that engine participates in driving, so as to undertake part driving power P ＇ by engine, to reduce the generating to auxiliary-motor The demand of power P 1, engine is set to be operated in default optimal economic region.
Thus, when vehicle demand power P2 is more than the maximum allowable generated output Pmax of auxiliary-motor, electrokinetic cell is external Electric discharge thinks that power motor is powered, and now, controls engine and power motor to output power to hybrid vehicle simultaneously Wheel, so that engine is operated in default optimal economic region.
As described above, as shown in figure 17, the electricity-generating control method of the hybrid vehicle of the utility model embodiment is specific Comprise the following steps：
S201：Obtain the SOC value M of electrokinetic cell and the vehicle velocity V of hybrid vehicle.
S202：Judge whether the vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed V1.
If it is, perform step S203；If it is not, then perform step S204.
S203：Judge whether the SOC value M of electrokinetic cell is less than or equal to the first preset value M1.
If it is, perform step S207；If it is not, then perform step S206.
S204：Judge whether the SOC value M of electrokinetic cell is less than or equal to the first preset value M1.
If it is, perform step S205；If it is not, then perform step S206.
S205：Engine is controlled to participate in driving.
S206：Control engine does not drive auxiliary-motor to generate electricity.
S207：Obtain the gas pedal depth D of hybrid vehicle and the vehicle resistance F of hybrid vehicle.
S208：Judge whether gas pedal depth D is more than the vehicle resistance of the first predetermined depth D1 or hybrid vehicle Whether the SOC value M whether power F is more than the first default resistance F1 or electrokinetic cell is less than default limiting value M2.
If it is, perform step S205；If it is not, then perform step S209.
S209：Obtain the vehicle demand power P2 of hybrid vehicle.
S210：Judge whether vehicle demand power P2 is less than or equal to the maximum allowable generated output Pmax of auxiliary-motor.
If it is, perform step S211；If it is not, then perform step S205.
S211：Control driven by engine auxiliary-motor is generated electricity, and engine is not involved in driving.
Now, control auxiliary-motor enters generated output shaping modes.
S212：Judge whether vehicle demand power P2 is less than minimum output power corresponding to the optimal economic region of engine Pmin。
If it is, perform step S213；If it is not, then perform step S214.
S213：The charge power P3 of electrokinetic cell is obtained according to the SOC value rate of change of electrokinetic cell, and performs step S215。
S214：The charge power P3 of electrokinetic cell is obtained according to the SOC value rate of change of electrokinetic cell, and performs step S216。
S215：Judge whether the charge power P3 of electrokinetic cell is less than minimum output power Pmin and vehicle demand power P2 difference.
If it is, perform step S217；If it is not, then perform step S216.
S216：According to the charge power P3 of electrokinetic cell and vehicle demand power P2 sums obtain engine it is default most Power output in good economic zone, and the power output by controlling engine to obtain is generated electricity.
S217：By controlling engine to be generated electricity with minimum output power Pmin.
To sum up, according to the electricity-generating control method of the hybrid vehicle of the utility model embodiment, electrokinetic cell is first obtained SOC values and hybrid vehicle speed, deducted a part of pay according to the speed of the SOC value of electrokinetic cell and hybrid vehicle multiple Point machine enters generated output shaping modes, so that engine operates in default optimal economic region, starts so as to reduce The oil consumption of machine, improves the economy of vehicle operation, and reduces engine noise, while can realize multiple drive modes, energy Vehicle low speed electric equilibrium and low speed ride comfort are enough maintained, lifts vehicle performance.
Hybrid vehicle and its dynamical system based on above-described embodiment, the utility model embodiment also propose another The electricity-generating control method of hybrid vehicle.
Figure 18 is the flow chart according to the electricity-generating control method of the hybrid vehicle of the utility model embodiment.Such as Figure 18 Shown, the electricity-generating control method of hybrid vehicle comprises the following steps：
S100：Obtain the SOC value of electrokinetic cell and the speed of hybrid vehicle.
It should be noted that the SOC value of electrokinetic cell can be gathered by the battery management system of hybrid vehicle, so that Obtain the SOC value of electrokinetic cell.
S200：According to the SOC value of electrokinetic cell and the generated output P1 of the speed of hybrid vehicle control auxiliary-motor.
S300：The generated output of the engine of hybrid vehicle is obtained according to the generated output of auxiliary-motor, to control hair Motivation operates in default optimal economic region, wherein, auxiliary-motor is generated electricity under the drive of engine.
It should be noted that the default optimal economic region that engine's fuel consumption characteristics loop image determines engine can be combined. As Fig. 7 show an example of engine's fuel consumption characteristics loop image, wherein, side ordinate is the output torque of engine, horizontal Coordinate is the rotating speed of engine, and curve a is the fuel-economy curve of engine.Region corresponding to fuel-economy curve is to start The optimal economic region of machine, that is, say when the torque of engine and moment of torsion are located on the fuel-economy curve of engine optimum, send out Motivation is in optimal economic region.Thus, in the utility model embodiment, can be turned round by the rotating speed and output for controlling engine Square falls in engine fuel economic curve for example on curve a, so that engine operates in default optimal economic region.
Further, according to one embodiment of the present utility model, during the traveling of hybrid vehicle, obtain dynamic The SOC value of power battery and the vehicle velocity V of hybrid vehicle, and according to the SOC value of electrokinetic cell and the vehicle velocity V of hybrid vehicle The generated output P1 of auxiliary-motor is controlled, and the generated output P0 of engine 1 is obtained to control according to the generated output P1 of auxiliary-motor Engine processed operates in default optimal economic region.
Specifically, during hybrid electric vehicle is sailed, engine can output power to mixing by clutch The wheel of power vehicle, and engine can also drive auxiliary-motor to be generated electricity.Thus, the power output of engine mainly includes Two parts, part output is to auxiliary-motor, that is, the power that drives auxiliary-motor to be generated electricity, and another part is output to wheel, i.e., The power of driving moment.
When driven by engine auxiliary-motor is generated electricity, the SOC value and hybrid vehicle of electrokinetic cell can be obtained first Speed, the generated output P1 of auxiliary-motor is then controlled according to the SOC value of electrokinetic cell and the speed of hybrid vehicle, and The generated output P0 of engine 1 is obtained to control engine to operate in default optimal economic according to the generated output P1 of auxiliary-motor Region.Determine what driven by engine auxiliary-motor was generated electricity on the premise of engine is operated in default optimal economic region Power, so as to adjust the generated output of auxiliary-motor.
Thereby, it is possible to make engine be operated in default optimal economic region, because engine is in default optimal economic The oil consumption in region is minimum, fuel economy highest, so as to reduce the oil consumption of engine, reduces the noise of engine, improves whole The economy of car operation.Auxiliary-motor has higher generated output and generating efficiency when being additionally, since low speed, so as to meet The power demand run at a low speed, vehicle low speed electric equilibrium can be maintained, maintain vehicle low speed ride comfort, lift the dynamic property of vehicle Energy.Wherein, by power battery charging, it can be ensured that the power demand of power motor and high-voltage electrical equipment, and then ensure to move Force motor drives vehicle normally travel.
Further, according to one embodiment of the present utility model, when the SOC value of electrokinetic cell is more than default limiting value And when being less than or equal to the first preset value, if the vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed V1, to auxiliary-motor Generated output P1 is controlled.
Wherein, the first preset value can be the upper bound limit value of the SOC value of the electrokinetic cell pre-set, for example, stop charging Decision content, be preferably 30%.Default limiting value can be the lower bound limit value of the SOC value of the electrokinetic cell pre-set, example It is preferably 10% such as to stop the decision content of electric discharge.Can be by electrokinetic cell according to the first preset value and default limiting value SOC value is divided into three sections, i.e. the first electricity section, the second electricity section and the 3rd electricity section, as the SOC of electrokinetic cell When value is less than or equal to default limiting value, the SOC value of electrokinetic cell is in the first electricity section, and now electrokinetic cell only charges Do not discharge；When the SOC value of electrokinetic cell is more than default limiting value and is less than or equal to the first preset value, electrokinetic cell SOC value is in the second electricity section, and now electrokinetic cell has charge requirement, you can actively to power battery charging；Work as power When the SOC value of battery is more than the first preset value, the SOC value of electrokinetic cell is in the 3rd electricity section, and now electrokinetic cell can not Charging, i.e., will not actively give power battery charging.
Specifically, after the SOC value and the vehicle velocity V of hybrid vehicle for obtaining electrokinetic cell, it can determine whether power electric Section residing for the SOC value in pond, if the SOC value of electrokinetic cell is in middle electricity section, the SOC value of electrokinetic cell, which is more than, to be preset Limiting value and be less than or equal to the first preset value, then explanation electrokinetic cell can be charged, now determine whether to mix Whether the vehicle velocity V of power vehicle is less than the first preset vehicle speed V1, if the vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed V1, then the generated output P1 of auxiliary-motor 5 is controlled, now the speed of hybrid vehicle is relatively low, required driving force compared with Few, power motor is enough to drive hybrid electric vehicle to sail, and engine only can drive auxiliary-motor to be generated electricity, and be not involved in driving.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
Further, according to one embodiment of the present utility model, when the SOC value of electrokinetic cell is more than default limiting value M2 and when vehicle velocity V less than or equal to the first preset value M1 and hybrid vehicle is less than the first preset vehicle speed V1, also obtains and mixes The vehicle demand power P2 of power vehicle is closed, and is less than or equal to the maximum allowable generated output of auxiliary-motor in vehicle demand power P2 During Pmax, the generated output P1 of auxiliary-motor is controlled.
Specifically, during the traveling of hybrid vehicle, if the SOC value of electrokinetic cell is more than the default limit Value M2 and vehicle velocity V less than or equal to the first preset value M1 and hybrid vehicle is less than the first preset vehicle speed V1, that is, mix The speed of power vehicle is relatively low, then obtains the vehicle demand power P2 of hybrid vehicle, and is less than in vehicle demand power P2 Equal to auxiliary-motor maximum allowable generated output Pmax when, the generated output P1 of auxiliary-motor is controlled.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
Further, according to one embodiment of the present utility model, when the SOC value of electrokinetic cell is more than the default limit It is worth and is less than the first preset vehicle speed V1 and vehicle demand power less than or equal to the first preset value M1, the vehicle velocity V of hybrid vehicle P2 be less than or equal to auxiliary-motor maximum allowable generated output Pmax when, also obtain hybrid vehicle gas pedal depth D and The vehicle resistance F of hybrid vehicle, and it is less than or equal to the first predetermined depth D1 and hybrid vehicle in gas pedal depth D Vehicle resistance F when being less than or equal to the first default resistance F1, the generated output P1 of auxiliary-motor is controlled.
It should be noted that the car resistance that the vehicle resistance of hybrid vehicle can be hybrid vehicle for example rolls Resistance, acceleration resistance, grade resistance and air drag etc..
Specifically, if the SOC value of electrokinetic cell is more than default limiting value and is less than or equal to the first preset value M1, mixes The vehicle velocity V for closing power vehicle is less than or equal to the maximum allowable of auxiliary-motor less than the first preset vehicle speed V1 and vehicle demand power P2 Generated output Pmax, then the gas pedal depth D of hybrid vehicle and the vehicle resistance F of hybrid vehicle are obtained in real time, The vehicle resistance F for being less than or equal to the first predetermined depth D1 and hybrid vehicle as gas pedal depth D is pre- less than or equal to first During handicapping power F1, illustrate that hybrid vehicle operates in low-speed mode, and the generated output P1 of auxiliary-motor is controlled.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
As above, when hybrid vehicle is run at a low speed, engine 1 can only generate electricity and be not involved in driving, due to engine not Driving is participated in, clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving easypro Adaptive, also, engine is operated in economic zone in low speed, due to oil consumption of the engine in default optimal economic region Minimum, fuel economy highest, so as to reduce oil consumption, engine noise is reduced, the economy of vehicle operation is improved, so as to tie up Vehicle low speed electric equilibrium and low speed ride comfort are held, lifts vehicle performance.
According to one embodiment of the present utility model, when control engine individually drives auxiliary-motor to be generated electricity and controls During the independent output driving power of power motor, the generated output P0 of engine obtains according to below equation：
P0=P1/ η/ζ
Wherein, P1 represents the generated output of auxiliary-motor, and η represents Belt Transmission Efficiency, and ζ represents the efficiency of auxiliary-motor.
That is, engine can only generate electricity be not involved in driving in the case of, generated output, skin that can be according to auxiliary-motor The efficiency ζ of V belt translation efficiency eta and auxiliary-motor calculates the generated output P0 of engine, and the generating work(for controlling engine to obtain Rate P0 drives auxiliary-motor to be generated electricity, to control the generated output of auxiliary-motor.
Correspondingly, when hybrid vehicle electrokinetic cell SOC value, vehicle velocity V, gas pedal depth D and vehicle resistance When F is unsatisfactory for above-mentioned condition, engine may participate in driving, and its specific work process is as follows.
According to one embodiment of the present utility model, it is less than default limiting value in the SOC value of electrokinetic cell or mixing is dynamic The speed of power automobile is more than or equal to the first preset vehicle speed or vehicle demand power is more than the maximum allowable generating work(of auxiliary-motor Rate or gas pedal depth are more than the first predetermined depth or the vehicle resistance of hybrid vehicle is more than the first pre- handicapping During power, control engine participates in driving.
That is, the SOC value in electrokinetic cell is big less than the speed of default limiting value M2 or hybrid vehicle In the maximum allowable generated output or gas pedal that are more than auxiliary-motor equal to the first preset vehicle speed or vehicle demand power When depth is more than the vehicle resistance of the first predetermined depth or hybrid vehicle more than the first default resistance, engine is controlled Driving is participated in, now, electrokinetic cell no longer discharges, the driving force needed for vehicle is larger, vehicle demand power is larger, gas pedal Depth is larger or vehicle resistance is also larger, power motor be not enough to drive hybrid electric vehicle sail, engine participate in driving with Carry out supplying driving.
Thus, engine can participate in driving in the driving force deficiency that power motor exports, so that it is guaranteed that the normal row of vehicle Sail, improve the power performance of vehicle, improve the distance travelled of vehicle.
More specifically, when vehicle demand power is more than the maximum allowable generated output of auxiliary-motor, engine ginseng is also controlled With driving so that engine outputs power to wheel by clutch.
Also, when the SOC value of electrokinetic cell is less than or equal to default limiting value M2, also control engine participate in driving with Engine is set to output power to wheel by clutch；When the SOC value of electrokinetic cell is less than or equal to the first preset value M1, mixing When the vehicle velocity V of power vehicle is less than the first preset vehicle speed V1 and gas pedal depth D and is more than the first predetermined depth D1, also control is sent out Motivation participates in driving so that engine outputs power to wheel by clutch；When the SOC value of electrokinetic cell is less than or equal to the One preset value M1, the vehicle velocity V of hybrid vehicle are less than the first preset vehicle speed V1 and the vehicle resistance F of hybrid vehicle is more than During the first default resistance F1, engine is also controlled to participate in driving so that engine outputs power to wheel by clutch.
Specifically, generated electricity in driven by engine auxiliary-motor and power motor outputs driving force to hybrid vehicle Wheel when, obtain the SOC value of electrokinetic cell, gas pedal depth D, vehicle velocity V and the vehicle resistance of hybrid vehicle in real time F, and SOC value, the gas pedal depth D of hybrid vehicle, vehicle velocity V and the vehicle resistance F to electrokinetic cell judge, and The generated output of auxiliary-motor is adjusted according to following three kinds of judged results：
First, when the SOC value of electrokinetic cell is less than default limiting value M2, control engine is by clutch by power Wheel is output to, so that engine and power motor simultaneously participate in driving, reduces the load of power motor to reduce electrokinetic cell Power consumption, so as to ensure that engine is operated in default optimal economic region, while avoid the SOC value of electrokinetic cell fast Speed declines.
Second, when the SOC value of electrokinetic cell is less than or equal to the first preset value M1, the vehicle velocity V of hybrid vehicle is less than the One preset vehicle speed V1 and when gas pedal depth D is more than the first predetermined depth D1, control engine is defeated by power by clutch Go out to wheel, so that engine and power motor simultaneously participate in driving, reduce the load of power motor to reduce electrokinetic cell Power consumption, so as to ensure that engine is operated in default optimal economic region, while avoid the SOC value of electrokinetic cell quick Decline.
Third, when the SOC value of electrokinetic cell is less than or equal to the first preset value M1, the vehicle velocity V of hybrid vehicle is less than the When the resistance F of one preset vehicle speed V1 and hybrid vehicle is more than the first default resistance F1, control engine will by clutch Power output is to wheel, so that engine and power motor simultaneously participate in driving, reduces the load of power motor to reduce power The power consumption of battery, so as to ensure that engine is operated in default optimal economic region, while avoid electrokinetic cell SOC value rapid decrease.
Thus, engine can participate in driving in the driving force deficiency that power motor exports, so that it is guaranteed that the normal row of vehicle Sail, improve the power performance of vehicle, improve the distance travelled of vehicle.Also, controllable engine is operated in economic zone, Because oil consumption of the engine in default optimal economic region is minimum, fuel economy highest, so as to reduce oil consumption, hair is reduced Motivation noise, improve vehicle economic performance.
In addition, when the SOC value of electrokinetic cell is less than or equal to default limiting value, and the speed of hybrid vehicle is more than the During one preset vehicle speed, control engine participates in driving so that engine outputs power to wheel by clutch.
Thus, engine can participate in driving in the driving force deficiency that power motor exports, so that it is guaranteed that the normal row of vehicle Sail, improve the power performance of vehicle, improve the distance travelled of vehicle.
However, it is to be understood that when the SOC value of electrokinetic cell is more than the first preset value, engine does not drive secondary electricity Machine is generated electricity, and now the electricity of electrokinetic cell is close to full electricity, and without charging, engine does not drive auxiliary-motor to be generated electricity. That is when the electricity of electrokinetic cell is close full electric, engine does not drive auxiliary-motor to be generated electricity, so as to which auxiliary-motor is not to dynamic Power battery charges.
Furthermore, after auxiliary-motor enters generated output shaping modes, the generated output of auxiliary-motor can be adjusted Save, the generated output regulation process to the utility model embodiment is specifically described below.
It is dynamic according to mixing after auxiliary-motor enters generated output shaping modes according to one embodiment of the present utility model The vehicle demand power P2 of power automobile and the charge power P3 of electrokinetic cell are controlled to the generated output P1 of auxiliary-motor.
According to one embodiment of the present utility model, according to the vehicle demand power P2 and electrokinetic cell of hybrid vehicle Charge power P3 control auxiliary-motor generated output P1 formula it is as follows：
P1=P2+P3, wherein, P2=P11+P21,
P1 is the generated output of auxiliary-motor, and P2 is vehicle demand power, and P3 is the charge power of electrokinetic cell, and P11 is whole Car driving power, P21 are electric equipment power.
It should be noted that electric equipment may include the first electric equipment and the second electric equipment, i.e. electric equipment power P21 may include high-voltage electrical equipment and the power needed for low voltage equipment.
It should be noted that vehicle driving power P11 may include the power output of power motor 2, can be according to power motor The rotating speed of default throttle-torque curve and power motor obtain vehicle driving power P11, wherein, it is bent to preset throttle-torque Line can be determined when hybrid electric vehicle power matches.In addition, electricity can be obtained in real time according to the electric equipment that vehicle is run Device plant capacity P21, such as electric equipment power P 21 is calculated by DC consumption in bus.In addition, can be according to electrokinetic cell SOC value obtains the charge power P3 of electrokinetic cell.Assuming that the vehicle driving power P11=b1kw obtained in real time, electric equipment work( Rate P21=b2kw, the charge power P3=b3kw of electrokinetic cell, then auxiliary-motor generated output=b1+b2+b3.
Specifically, during hybrid electric vehicle is sailed, charge power P3, the vehicle driving of electrokinetic cell can be obtained Power P 11 and electric equipment power P 21, and by the charge power P3, vehicle driving power P11 and electric equipment work(of electrokinetic cell Generated output P1 of the rate P21 sums as auxiliary-motor, thus, the generated output of auxiliary-motor can be carried out according to the P1 values calculated Control, such as the output torque and rotating speed of engine can be controlled according to the P1 values calculated, with to driven by engine pair The power that motor is generated electricity is controlled.
Further, according to one embodiment of the present utility model, the generated output of auxiliary-motor is adjusted, including： The SOC value rate of change of electrokinetic cell is obtained, and it is corresponding with the optimal economic region of engine according to vehicle demand power P2 The generated output of the SOC value rate of change control auxiliary-motor of relation and electrokinetic cell between minimum output power Pmin.
Specifically, the optimal economic region of engine can be determined according to the universal characteristic curve of engine shown in Fig. 7, is entered And minimum output power Pmin corresponding to the optimal economic region of engine is obtained, it is determined that the optimal economic region pair of engine After the minimum output power Pmin answered, you can corresponding most with the optimal economic region of engine according to vehicle demand power P2 The generated output of the SOC value rate of change control auxiliary-motor 5 of relation and electrokinetic cell between small power output Pmin.
Thus, when hybrid vehicle is run at a low speed, engine is operated in economic zone, oil consumption can be reduced, reduce Engine noise, the economic performance of vehicle is improved, also, in low speed, engine only generating can be not involved in driving, due to starting Machine is not involved in driving, and clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving Comfortableness, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.
It is described further below after auxiliary-motor enters generated output shaping modes, according to vehicle demand power P2 with starting The SOC value rate of change control of relation and electrokinetic cell between minimum output power Pmin corresponding to the optimal economic region of machine The specific regulative mode of the generated output of auxiliary-motor processed.
Specifically, generated electricity in driven by engine auxiliary-motor and power motor outputs driving force to hybrid vehicle Wheel when, obtain vehicle driving power P11 and electric equipment power P 21 in real time, needed with obtaining the vehicle of hybrid vehicle Power P 2 is sought, the vehicle demand power P2 of hybrid vehicle is judged, wherein, vehicle demand power P2 can meet following Three kinds of situations.
The first situation is：Vehicle demand power P2 is less than minimum output power corresponding to the optimal economic region of engine Pmin；Second of situation be：Vehicle demand power P2 is more than or equal to minimum output work corresponding to the optimal economic region of engine Rate Pmin and the maximum allowable generated output Pmax for being less than or equal to auxiliary-motor；The third situation is：Vehicle demand power P2 is more than The maximum allowable generated output Pmax of auxiliary-motor.
In one embodiment of the first situation, when vehicle demand power P2 is less than the optimal economic region pair of engine During the minimum output power Pmin answered, the charge power P3 of electrokinetic cell is obtained according to the SOC value rate of change of electrokinetic cell, and Judge whether the charge power P3 of electrokinetic cell is less than minimum output power Pmin and vehicle demand power P2 difference, wherein, If the charge power P3 of electrokinetic cell is less than minimum output power Pmin and vehicle demand power P2 difference, control is started Machine is generated electricity with minimum output power Pmin to control the generated output of auxiliary-motor；If the charge power P3 of electrokinetic cell More than or equal to minimum output power Pmin and vehicle demand power P2 difference, then according to the charge power P3 of electrokinetic cell with it is whole Car demand power P2 sums obtain power output of the engine in default optimal economic region, and control engine to obtain Power output generated electricity to control the generated output P1 of auxiliary-motor.
It should be noted that between the SOC value rate of change for the electrokinetic cell that can prestore and the charge power P3 of electrokinetic cell The first relation table, thus, obtain electrokinetic cell SOC value rate of change after, by compare the first relation table can obtain The charge power P3 of electrokinetic cell corresponding to taking.The SOC value rate of change of electrokinetic cell and the charge power P3 of electrokinetic cell expire Relation shown in sufficient table 1 below.
Table 1
The SOC value rate of change of electrokinetic cell 3 A1 A2 A3 A4 A5
The charge power P3 of electrokinetic cell 3 B1 B2 B3 B4 B5
As known to table 1, when the SOC value rate of change got is A1, the charging of the corresponding electrokinetic cell got Power P 3 is B1；When the SOC value rate of change got is A2, the charge power P3 of the corresponding electrokinetic cell got is B2；When the SOC value rate of change got is A3, the charge power P3 of the corresponding electrokinetic cell got is B3；When obtaining When the SOC value rate of change got is A4, the charge power P3 of the corresponding electrokinetic cell got is B4；When what is got When SOC value rate of change is A5, the charge power P3 of the corresponding electrokinetic cell got is B5.
Specifically, when carrying out generated output control to auxiliary-motor, obtain vehicle driving power P11 in real time and electrical equipment is set Standby power P 21, to obtain the vehicle demand power P2 of hybrid vehicle, and to the vehicle demand power P2 of hybrid vehicle Judged., can when vehicle demand power P2 is less than minimum output power Pmin corresponding to the optimal economic region of engine The charge power P3 of electrokinetic cell is obtained according to the SOC value rate of change of electrokinetic cell, and judges the charge power of electrokinetic cell Whether P3 is less than or equal to minimum output power Pmin and vehicle demand power P2 difference.
When vehicle demand power P2 is less than minimum output power Pmin corresponding to the optimal economic region of engine, if Differences of the charge power P3 of electrokinetic cell less than minimum output power Pmin and vehicle demand power P2, i.e. P3 ＜ Pmin-P2, Then by controlling engine to be generated electricity with minimum output power Pmin to control the generated output of auxiliary-motor 1；If power Differences of the charge power P3 of battery more than or equal to minimum output power Pmin and vehicle demand power P2, i.e. P3 >=Pmin-P2, Engine is then obtained in default optimal economic region according to the charge power P3 of electrokinetic cell and vehicle demand power P2 sums Interior power output, and the power output by controlling engine to obtain is generated electricity to control the generated output of auxiliary-motor.
Thus, when vehicle demand power P2 is less than minimum output power Pmin corresponding to the optimal economic region of engine When, according to the charge power P3 of electrokinetic cell minimum output power Pmins corresponding with the optimal economic region of engine and vehicle The generated output of the Relation acquisition engine of demand power P2 difference, so that engine operates in default optimal economic region, And engine is only generated electricity and is not involved in driving, so as to reduce the oil consumption of engine, and the noise of engine is reduced.
In one embodiment of second of situation, when vehicle demand power P2 is more than or equal to the optimal economic area of engine Minimum output power Pmin corresponding to domain and less than or equal to auxiliary-motor maximum allowable generated output Pmax when, according to electrokinetic cell SOC value rate of change obtain the charge power P3 of electrokinetic cell, and according to the charge power P3 of electrokinetic cell and vehicle demand The sum of power P 2 obtains power output of the engine in default optimal economic region, and by controlling engine to obtain Power output generated electricity to control the generated output P1 of auxiliary-motor.
Specifically, when vehicle demand power P2 is more than or equal to minimum output work corresponding to the optimal economic region of engine Rate Pmin and less than auxiliary-motor maximum allowable generated output Pmax when, control engine be operated in default optimal economic SOC value rate of change during region always according to electrokinetic cell obtains the charge power P3 of electrokinetic cell, and according to electrokinetic cell Charge power P3 obtains power output of the engine in default optimal economic region with vehicle demand power P2 sums, its In, power output=P3+P2 of acquisition.And then engine is controlled to be generated electricity with the power output obtained to control auxiliary-motor Generated output P1 so that the SOC value increase of electrokinetic cell, and makes engine be operated in default optimal economic region.
Thus, when vehicle demand power P2 is more than or equal to minimum output power corresponding to the optimal economic region of engine 1 Pmin and less than auxiliary-motor 5 maximum allowable generated output Pmax when, according to the charge power P3 of electrokinetic cell 3 and vehicle need Ask the sum of power P 2 to obtain the power output of engine 1, so that engine 1 operates in default optimal economic region, and start Machine 1 is only generated electricity and is not involved in driving, and so as to reduce the oil consumption of engine, and reduces the noise of engine.
In one embodiment of the third situation, when vehicle demand power P2 is more than the maximum allowable generating work(of auxiliary-motor During rate Pmax, engine is also controlled to participate in driving so that engine outputs power to wheel by clutch.
Specifically, when the vehicle demand power P2 maximum allowable generated output Pmax for being more than auxiliary-motor are hybrid power vapour When the vehicle demand power P2 of car is higher than the generated output P1 of auxiliary-motor, also engine is controlled to be outputted driving force to by clutch Wheel is so that engine participates in driving, so as to undertake part driving power P ＇ by engine, to reduce the generating to auxiliary-motor The demand of power P 1, engine is set to be operated in default optimal economic region.
Thus, when vehicle demand power P2 is more than the maximum allowable generated output Pmax of auxiliary-motor, electrokinetic cell is external Electric discharge to power motor to power, and now, control power motor outputs power to the wheel of hybrid vehicle, so as to start Machine is operated in default optimal economic region.
Thus, in low speed, engine can be operated in economic zone, and only generate electricity and be not involved in driving, so as to without using from Clutch, clutch abrasion or sliding wear are reduced, while reduce pause and transition in rhythm or melody sense, improve comfortableness, and reduce oil consumption, reduction is started Machine noise, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.
As described above, as shown in figure 19, the electricity-generating control method of the hybrid vehicle of the utility model embodiment is specific Comprise the following steps：
S301：Obtain the SOC value M of electrokinetic cell and the vehicle velocity V of hybrid vehicle.
S302：Judge whether the vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed V1.
If it is, perform step S303；If it is not, then perform step S304.
S303：Judge whether the SOC value M of electrokinetic cell is less than or equal to the first preset value M1.
If it is, perform step S307；If it is not, then perform step S306.
S304：Judge whether the SOC value M of electrokinetic cell is less than or equal to the first preset value M1.
If it is, perform step S305；If it is not, then perform step S306.
S305：Engine is controlled to participate in driving.
S306：Control engine does not drive auxiliary-motor to generate electricity.
S307：Obtain the gas pedal depth D of hybrid vehicle and the vehicle resistance F of hybrid vehicle.
S308：Judge whether gas pedal depth D is more than the vehicle resistance of the first predetermined depth D1 or hybrid vehicle Whether the SOC value M whether power F is more than the first default resistance F1 or electrokinetic cell is less than default limiting value M2.
If it is, perform step S305；If it is not, then perform step S309.
S309：Obtain the vehicle demand power P2 of hybrid vehicle.
S310：Judge whether vehicle demand power P2 is less than or equal to the maximum allowable generated output Pmax of auxiliary-motor.
If it is, perform step S311；If it is not, then perform step S305.
S311：Control driven by engine auxiliary-motor is generated electricity, and engine is not involved in driving.
S312：Judge whether vehicle demand power P2 is less than minimum output power corresponding to the optimal economic region of engine Pmin。
If it is, perform step S313；If it is not, then perform step S314.
S313：The charge power P3 of electrokinetic cell is obtained according to the SOC value rate of change of electrokinetic cell, and performs step S315。
S314：The charge power P3 of electrokinetic cell is obtained according to the SOC value rate of change of electrokinetic cell, and performs step S316。
S315：Judge whether the charge power P3 of electrokinetic cell is less than minimum output power Pmin and vehicle demand power P2 difference.
If it is, perform step S317；If it is not, then perform step S316.
S316：According to the charge power P3 of electrokinetic cell and vehicle demand power P2 sums obtain engine it is default most Power output in good economic zone, and the power output by controlling engine to obtain is generated electricity.
S317：By controlling engine to be generated electricity with minimum output power Pmin.
To sum up, according to the electricity-generating control method of the hybrid vehicle of the utility model embodiment, electrokinetic cell is first obtained SOC values and hybrid vehicle speed, deducted a part of pay according to the speed of the SOC value of electrokinetic cell and hybrid vehicle multiple Point machine enters generated output shaping modes, so that engine operates in default optimal economic region, starts so as to reduce The oil consumption of machine, improves the economy of vehicle operation, and reduces engine noise, while can realize multiple drive modes, energy Vehicle low speed electric equilibrium and low speed ride comfort are enough maintained, lifts vehicle performance.
Hybrid vehicle and its dynamical system based on above-described embodiment, the utility model embodiment also propose another The electricity-generating control method of hybrid vehicle.
Figure 20 is the flow chart according to the electricity-generating control method of the hybrid vehicle of the utility model embodiment.Such as Figure 20 It is shown, the electricity-generating control method of hybrid vehicle, comprise the following steps：
S21：Obtain the SOC value of electrokinetic cell and speed, the hybrid power vapour of hybrid vehicle of hybrid vehicle The SOC value of the low tension battery of car；
It should be noted that the SOC value of electrokinetic cell and low can be gathered by the battery management system of hybrid vehicle The SOC value of battery is pressed, so as to obtain the SOC value of electrokinetic cell and the SOC value of low tension battery.
S22：Entered according to the auxiliary-motor of the SOC value of electrokinetic cell and the speed of hybrid vehicle control hybrid vehicle Enter generated output shaping modes, so that the engine of hybrid vehicle operates in default optimal economic region, wherein, secondary electricity Machine is generated electricity under the drive of engine；
Wherein, generated output shaping modes are the pattern that the generated output of engine is adjusted, in generated output Shaping modes, it can be adjusted by controlling driven by engine auxiliary-motor to be generated electricity with the generated output to auxiliary-motor.
It should be noted that the default optimal economic region that engine's fuel consumption characteristics loop image determines engine can be combined. As Fig. 7 show an example of engine's fuel consumption characteristics loop image, wherein, side ordinate is the output torque of engine, horizontal Coordinate is the rotating speed of engine, and curve a is the fuel-economy curve of engine.Region corresponding to fuel-economy curve is to start The optimal economic region of machine, that is, say when the torque of engine and moment of torsion are located on the fuel-economy curve of engine optimum, send out Motivation is in optimal economic region.Thus, in the utility model embodiment, can be turned round by the rotating speed and output for controlling engine Square falls in engine fuel economic curve for example on curve a, so that engine operates in default optimal economic region.
S23：After auxiliary-motor enters generated output shaping modes, the hair according to the SOC value of low tension battery to auxiliary-motor Electrical power is adjusted.
Specifically, during hybrid electric vehicle is sailed, engine can output power to mixing by clutch The wheel of power vehicle, and engine can also drive auxiliary-motor to be generated electricity.Thus, the power output of engine mainly includes Two parts, part output is to auxiliary-motor, that is, the power that drives auxiliary-motor to be generated electricity, and another part is output to wheel, i.e., The power of driving moment.
When driven by engine auxiliary-motor is generated electricity, the SOC value and hybrid vehicle of electrokinetic cell can be obtained first Speed, then according to the SOC value of electrokinetic cell and the speed of hybrid vehicle control auxiliary-motor enter generated output regulation Pattern, so that engine is operated in default optimal economic region.In generated output shaping modes, engine can be operated in The generated output of auxiliary-motor is adjusted on the premise of default optimal economic region.Wherein, adjusted in auxiliary-motor into generated output After pattern, the generated output of auxiliary-motor is further adjusted always according to the SOC value of low tension battery.
Thereby, it is possible to make engine be operated in default optimal economic region, because engine is in default optimal economic The oil consumption in region is minimum, fuel economy highest, so as to reduce the oil consumption of engine, reduces the noise of engine, improves whole The economy of car operation.Auxiliary-motor has higher generated output and generating efficiency when being additionally, since low speed, so as to meet The power demand run at a low speed, vehicle low speed electric equilibrium can be maintained, maintain vehicle low speed ride comfort, lift the dynamic property of vehicle Energy.Wherein, by power battery charging, it can be ensured that the power demand of power motor and high-voltage electrical equipment, and then ensure to move Force motor drives vehicle normally travel, also, by being charged to low tension battery, it can be ensured that the electricity consumption of low voltage equipment needs Ask, and vehicle low pressure can be realized by low tension battery when auxiliary-motor stops generating and electrokinetic cell failure or not enough power supply Power supply, and then ensure that vehicle can realize pure fuel oil pattern traveling, improve vehicle distance travelled.
Further, according to one embodiment of the present utility model, when the SOC value of electrokinetic cell is more than default limiting value And when being less than or equal to the first preset value, if the speed of hybrid vehicle is less than the first preset vehicle speed, control auxiliary-motor enters Enter generated output shaping modes.
Wherein, the first preset value can be the upper bound limit value of the SOC value of the electrokinetic cell pre-set, for example, stop charging Decision content, be preferably 30%.Default limiting value can be the lower bound limit value of the SOC value of the electrokinetic cell pre-set, example It is preferably 10% such as to stop the decision content of electric discharge.Can be by electrokinetic cell according to the first preset value and default limiting value SOC value is divided into three sections, i.e. the first electricity section, the second electricity section and the 3rd electricity section, as the SOC of electrokinetic cell When value is less than or equal to default limiting value, the SOC value of electrokinetic cell is in the first electricity section, and now electrokinetic cell only charges Do not discharge；When the SOC value of electrokinetic cell is more than default limiting value and is less than or equal to the first preset value, electrokinetic cell SOC value is in the second electricity section, and now electrokinetic cell has charge requirement, you can actively to power battery charging；Work as power When the SOC value of battery is more than the first preset value, the SOC value of electrokinetic cell is in the 3rd electricity section, and now electrokinetic cell can not Charging, i.e., will not actively give power battery charging.
Specifically, after the SOC value and the speed of hybrid vehicle for obtaining electrokinetic cell, it can determine whether electrokinetic cell SOC value residing for section, if the SOC value of electrokinetic cell is in the second electricity section, the SOC value of electrokinetic cell is more than pre- If limiting value and be less than or equal to the first preset value, then explanation electrokinetic cell can be charged, now determine whether to mix Whether the speed for closing power vehicle is less than the first preset vehicle speed, if the speed of hybrid vehicle is less than the first preset vehicle speed, Then control auxiliary-motor enters generated output shaping modes, and now the speed of hybrid vehicle is relatively low, and required driving force is less, Power motor is enough to drive hybrid electric vehicle to sail, and engine only can drive auxiliary-motor to be generated electricity, and be not involved in driving.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
Further, when the SOC value of electrokinetic cell is more than default limiting value and less than or equal to the first preset value and mixes When the speed of conjunction power vehicle is less than the first preset vehicle speed, the vehicle demand power of hybrid vehicle is also obtained, and in vehicle When demand power is less than or equal to the maximum allowable generated output of auxiliary-motor, control auxiliary-motor enters generated output shaping modes.
That is, be more than default limiting value in the SOC value for judging electrokinetic cell and be less than or equal to the first preset value, And the speed of hybrid vehicle is less than after the first preset vehicle speed, can also determine whether vehicle demand power is more than The maximum allowable generated output of auxiliary-motor, if vehicle demand power is less than or equal to the maximum allowable generated output of auxiliary-motor, Control auxiliary-motor enters generated output shaping modes, and now, the driving force needed for vehicle is less, and vehicle demand power is smaller, Power motor is enough to drive hybrid electric vehicle to sail, and engine only can drive auxiliary-motor to be generated electricity, and be not involved in driving.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
Further, when the SOC value of electrokinetic cell is more than default limiting value and less than or equal to the first preset value, mixing The speed of power vehicle is less than the first preset vehicle speed and vehicle demand power is less than or equal to the maximum allowable generated output of auxiliary-motor When, the gas pedal depth of hybrid vehicle and the vehicle resistance of hybrid vehicle are also obtained, and in gas pedal depth When being less than or equal to the first default resistance less than or equal to the vehicle resistance of the first predetermined depth and hybrid vehicle, auxiliary-motor is controlled Into generated output shaping modes.
It should be noted that the car resistance that the vehicle resistance of hybrid vehicle can be hybrid vehicle for example rolls Resistance, acceleration resistance, grade resistance and air drag etc..
That is, be more than default limiting value in the SOC value for judging electrokinetic cell and be less than or equal to the first preset value, And the speed of hybrid vehicle is less than the first preset vehicle speed, and vehicle demand power is less than or equal to the maximum allowable hair of auxiliary-motor After electrical power, it can also determine whether gas pedal depth is more than the whole of the first predetermined depth and hybrid vehicle Whether car resistance is more than the first default resistance, if gas pedal depth is less than or equal to the first predetermined depth and hybrid vehicle Vehicle resistance be less than or equal to the first default resistance, then control auxiliary-motor to enter generated output shaping modes, now, needed for vehicle Driving force it is less, and vehicle demand power is smaller, and gas pedal depth is smaller, and vehicle resistance is also smaller, and power motor is enough Driving hybrid electric vehicle is sailed, and engine only can drive auxiliary-motor to be generated electricity, and be not involved in driving.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
As described above, when hybrid vehicle is run at a low speed, engine can only generate electricity and be not involved in driving, due to engine It is not involved in driving, clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving Comfortableness, also, engine is operated in economic zone in low speed, due to oil of the engine in default optimal economic region Minimum, fuel economy highest is consumed, so as to reduce oil consumption, engine noise is reduced, improves the economy of vehicle operation, so as to Vehicle low speed electric equilibrium and low speed ride comfort are maintained, lifts vehicle performance.
In addition, according to one embodiment of the present utility model, according to one embodiment of the present utility model, in electrokinetic cell SOC value be less than the speed of default limiting value or hybrid vehicle and be more than or equal to the first preset vehicle speed or vehicle and need Power is asked to be more than the first predetermined depth or mixing more than the maximum allowable generated output or gas pedal depth of auxiliary-motor When the vehicle resistance of power vehicle is more than the first default resistance, control engine participates in driving.
That is, the SOC value in electrokinetic cell is more than less than the speed of default limiting value or hybrid vehicle Equal to the maximum allowable generated output or gas pedal depth that the first preset vehicle speed or vehicle demand power are more than auxiliary-motor When degree is more than the first default resistance more than the vehicle resistance of the first predetermined depth or hybrid vehicle, control module control Engine participates in driving, and now, electrokinetic cell no longer discharges, the driving force needed for vehicle is larger, vehicle demand power is larger, oily Door tread depths are larger or vehicle resistance is also larger, and power motor is not enough to drive hybrid electric vehicle to sail, and engine participates in Drive to carry out supplying driving.
Thus, engine can participate in driving in the driving force deficiency that power motor exports, so that it is guaranteed that the normal row of vehicle Sail, improve the power performance of vehicle, improve the distance travelled of vehicle.
More specifically, when vehicle demand power is more than the maximum allowable generated output of auxiliary-motor, engine ginseng is also controlled With driving so that engine outputs power to the wheel of hybrid vehicle by clutch.
Also, when the SOC value of electrokinetic cell is less than or equal to default limiting value, also control engine participate in drive so that Engine outputs power to the wheel of hybrid vehicle by clutch；When the SOC value of electrokinetic cell is less than or equal to first When preset value, the speed of hybrid vehicle are less than the first preset vehicle speed and gas pedal depth and are more than the first predetermined depth, and also Engine is controlled to participate in driving so that engine outputs power to wheel by clutch；When the SOC value of electrokinetic cell is less than Speed equal to the first preset value, hybrid vehicle is more than less than the vehicle resistance of the first preset vehicle speed and hybrid vehicle During the first default resistance, engine is also controlled to participate in driving so that engine outputs power to wheel by clutch.
That is, the SOC value of electrokinetic cell, the gas pedal depth of hybrid vehicle, speed, whole can be obtained in real time Car resistance and vehicle demand power, and SOC value to electrokinetic cell, the gas pedal depth of hybrid vehicle, speed and Vehicle resistance is judged：
First, when the SOC value of electrokinetic cell is less than default limiting value, because of the low battery of electrokinetic cell, power electric Pond can not provide enough electric energy, control engine and power motor to simultaneously participate in driving, and also controllable driven by engine Auxiliary-motor is generated electricity to be charged to electrokinetic cell, and now also controllable driven by engine auxiliary-motor is generated electricity, and Generated output by adjusting auxiliary-motor can make engine be operated in default optimal economic region.
Second, when the SOC value of electrokinetic cell is pre- less than first less than or equal to the speed of the first preset value, hybrid vehicle If speed and when gas pedal depth is more than the first predetermined depth, because gas pedal depth is deeper, control module control engine Driving is simultaneously participated in power motor, now also controllable driven by engine auxiliary-motor is generated electricity, and by adjusting secondary electricity The generated output of machine can make engine be operated in default optimal economic region.
Third, when the SOC value of electrokinetic cell is pre- less than first less than or equal to the speed of the first preset value, hybrid vehicle If the vehicle resistance of speed and hybrid vehicle is more than the first default resistance, because vehicle resistance is larger, engine can control Driving is simultaneously participated in power motor, now also controllable driven by engine auxiliary-motor is generated electricity, and by adjusting secondary electricity The generated output of machine can make engine be operated in default optimal economic region.
Thus, engine can participate in driving in the driving force deficiency that power motor exports, so that it is guaranteed that the normal row of vehicle Sail, improve the power performance of vehicle, improve the distance travelled of vehicle.Also, controllable engine is operated in economic zone, Because oil consumption of the engine 1 in default optimal economic region is minimum, fuel economy highest, so as to reduce oil consumption, reduce Engine noise, improve vehicle economic performance.
In addition, control module is additionally operable to：When the SOC value of electrokinetic cell is less than or equal to default limiting value, and hybrid power When the speed of automobile is more than the first preset vehicle speed, control engine participates in driving so that engine is outputed power by clutch To wheel.
Thus, engine can participate in driving in the driving force deficiency that power motor exports, so that it is guaranteed that the normal row of vehicle Sail, improve the power performance of vehicle, improve the distance travelled of vehicle.
However, it is to be understood that control module is additionally operable to：When the SOC value of electrokinetic cell is more than the first preset value, hair Motivation does not drive auxiliary-motor to be generated electricity, and now the electricity of electrokinetic cell is close to full electricity, and without charging, engine does not drive secondary electricity Machine is generated electricity.That is, when the electricity of electrokinetic cell is close full electric, engine does not drive auxiliary-motor to be generated electricity, from And auxiliary-motor is not to power battery charging.
Furthermore, after auxiliary-motor enters electrical power shaping modes, the generated output of auxiliary-motor can be adjusted, The generated output regulation process to the utility model embodiment is specifically described below.
It is dynamic according to mixing after auxiliary-motor enters generated output shaping modes according to one embodiment of the present utility model The vehicle demand power of power automobile, the charge power of the charge power of electrokinetic cell and low tension battery, the SOC of low tension battery The generated output of auxiliary-motor is adjusted value.
Specifically, according to the vehicle demand power of hybrid vehicle, the charge power and low tension battery of electrokinetic cell Charge power regulation auxiliary-motor generated output formula it is as follows：
P1=P2+P3+P4, wherein, P2=P11+P21,
P1 is the generated output of auxiliary-motor, and P2 is vehicle demand power, and P3 is the charge power of electrokinetic cell, and P4 is low pressure The charge power of battery, P11 are vehicle driving power, and P21 is electric equipment power.
It should be noted that electric equipment includes the first electric equipment and the second electric equipment, i.e. electric equipment power P 21 It may include high-voltage electrical equipment and the power needed for low voltage equipment.
It should be noted that vehicle driving power P11 may include the power output of power motor, can be according to power motor The rotating speed of default throttle-torque curve and power motor obtains vehicle driving power P11, wherein, preset throttle-torque curve It can be determined when hybrid electric vehicle power matches；Electric equipment work(can be obtained in real time according to the electric equipment that vehicle is run Rate P21, such as electric equipment power P 21 is calculated by DC consumption in bus；It can be obtained according to the SOC value of electrokinetic cell dynamic The charge power P3 of power battery, and according to the charge power P4 of the SOC value of low tension battery acquisition low tension battery.
Specifically, during hybrid electric vehicle is sailed, charge power P3, the low pressure electric power storage of electrokinetic cell can be obtained Charge power P4, vehicle driving power P11 and the electric equipment power P 21 in pond, and by the charge power P3 of electrokinetic cell, low pressure Generated outputs of the charge power P4, vehicle driving power P11 and the sum of electric equipment power P 21 of battery as auxiliary-motor P1, thus, the generated output of auxiliary-motor can be adjusted according to the P1 values calculated, such as can be according to the P1 values calculated The output torque and rotating speed of engine are controlled, are adjusted with the power to be generated electricity to engine auxiliary-motor.
Further, according to one embodiment of the present utility model, the generated output of auxiliary-motor is adjusted, including： The SOC value rate of change of electrokinetic cell is obtained, and it is corresponding most with the optimal economic region of engine according to vehicle demand power The SOC value rate of change of relation and electrokinetic cell, the SOC value of low tension battery, low tension battery between small power output SOC value rate of change regulation auxiliary-motor generated output.
It should be appreciated that the SOC value rate of change of electrokinetic cell can be obtained according to the SOC value of electrokinetic cell, for example, often Individual time interval t gathers the SOC value of an electrokinetic cell, so can by the current SOC value of electrokinetic cell and previous SOC values it SOC value rate of change of difference and time interval the t ratio as electrokinetic cell.Similarly, can be according to the SOC value of low tension battery The SOC value rate of change of low tension battery is obtained, for example, each time interval t gathers the SOC value of a low tension battery, such as This can be using the difference of the current SOC value of low tension battery and previous SOC value and time interval t ratio as low tension battery SOC value rate of change.
Specifically, the optimal economic region of engine can be determined according to the universal characteristic curve of engine shown in Fig. 7, is entered And minimum output power corresponding to the optimal economic region of engine is obtained, it is determined that corresponding to the optimal economic region of engine After minimum output power, you can according to vehicle demand power P2 minimum output works corresponding with the optimal economic region of engine The SOC value rate of change of relation and electrokinetic cell, the SOC value of low tension battery, low tension battery between rate Pmin SOC value rate of change adjusts the generated output of auxiliary-motor.
Thus, when hybrid vehicle is run at a low speed, engine is operated in economic zone, oil consumption can be reduced, reduce Engine noise, the economic performance of vehicle is improved, also, in low speed, engine only generating can be not involved in driving, due to starting Machine is not involved in driving, and clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving Comfortableness, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.
It is described further below after auxiliary-motor 5 enters generated output shaping modes, according to vehicle demand power P2 and hair The SOC value change speed of relation and electrokinetic cell between minimum output power Pmin corresponding to the optimal economic region of motivation Rate, the SOC value of low tension battery, the SOC value rate of change of low tension battery adjust the specific control of the generated output of auxiliary-motor Mode.
Specifically, when the SOC value of low tension battery is more than default low battery threshold value, according to the SOC value of electrokinetic cell Rate of change obtains the charge power of electrokinetic cell, and judges whether the charge power of electrokinetic cell is less than the optimal warp of engine The difference of minimum output power and vehicle demand power corresponding to Ji region, wherein, if the charge power of electrokinetic cell is less than hair The difference of minimum output power and vehicle demand power corresponding to the optimal economic region of motivation, then by control engine with this most Small power output is generated electricity to adjust the generated output of auxiliary-motor；If the charge power of electrokinetic cell is more than or equal to engine Optimal economic region corresponding to the difference of minimum output power and vehicle demand power, then according to the charge power of electrokinetic cell with Vehicle demand power sum obtains power output of the engine in default optimal economic region, and by control engine with The power output of acquisition is generated electricity to adjust the generated output of auxiliary-motor.
Specifically, when the SOC value of low tension battery is less than or equal to default low battery threshold value, low tension battery is obtained The SOC value rate of change of SOC value changes speed and electrokinetic cell, and it is low according to the acquisition of the SOC value rate of change of low tension battery Press the charge power of battery and the charge power of electrokinetic cell is obtained according to the SOC value rate of change of electrokinetic cell, and sentence Whether the charge power of disconnected low tension battery and the charge power sum of electrokinetic cell are less than the optimal economic region pair of engine The minimum output power and the difference of vehicle demand power answered, wherein, if the charge power of low tension battery and electrokinetic cell Charge power sum is then led to less than the difference of minimum output power and vehicle demand power corresponding to the optimal economic region of engine Control engine is crossed to be generated electricity with the minimum output power to adjust the generated output of auxiliary-motor；If low tension battery fills Electrical power minimum output power corresponding with the optimal economic region that the charge power sum of electrokinetic cell is more than or equal to engine And the difference of vehicle demand power, then according to the charge power of electrokinetic cell, the charge power of low tension battery and vehicle demand work( Rate sum obtains power output of the engine in default optimal economic region, and defeated with what is obtained by controlling engine Go out power to be generated electricity to adjust the generated output of auxiliary-motor.
It should be noted that the charging of the SOC value rate of change and electrokinetic cell for the electrokinetic cell that can be prestored in control module The first relation table between power P 3, thus, after the SOC value rate of change of electrokinetic cell is obtained, closed by comparing first It is the charge power P3 of electrokinetic cell corresponding to table can obtain.For example, the SOC value rate of change and electrokinetic cell of electrokinetic cell Charge power P3 between the first relation table can be as shown in table 1 below.
Table 1
The SOC value rate of change of electrokinetic cell A1 A2 A3 A4 A5
The charge power of electrokinetic cell B1 B2 B3 B4 B5
From upper table 1, the charging of corresponding electrokinetic cell can be obtained when the SOC value rate of change of electrokinetic cell is A1 Power P 3 is B1；The charge power P3 of electrokinetic cell is corresponding to being obtained when the SOC value rate of change of electrokinetic cell is A2 B2；The charge power P3 of electrokinetic cell is B3 corresponding to being obtained when the SOC value rate of change of electrokinetic cell is A3；When dynamic The SOC value rate of change of power battery can obtain corresponding electrokinetic cell charge power P3 when being A4 is B4；When electrokinetic cell SOC value rate of change can obtain corresponding electrokinetic cell charge power P3 when being A5 is B5.
Similarly, can prestore the SOC value rate of change of low tension battery and the charging work(of low tension battery in control module The second relation table between rate P4, thus, after the SOC value rate of change of low tension battery is obtained, closed by comparing second It is the charge power P4 of low tension battery corresponding to table can obtain.For example, the SOC value rate of change and low pressure of low tension battery The first relation table between the charge power P4 of battery can be as shown in table 2 below.
Table 2
The SOC value rate of change of low tension battery A11 A12 A13 A14 A15
The charge power of low tension battery B11 B12 B13 B14 B15
From upper table 2, corresponding low tension battery can be obtained when the SOC value rate of change of low tension battery is A11 Charge power P4 be B11；Low tension battery corresponding to being obtained when the SOC value rate of change of low tension battery is A12 Charge power P4 is B12；Low tension battery fills corresponding to being obtained when the SOC value rate of change of low tension battery is A13 Electrical power P 4 is B13；The charging of low tension battery corresponding to being obtained when the SOC value rate of change of low tension battery is A14 Power P 4 is B14；The charging work(of low tension battery corresponding to being obtained when the SOC value rate of change of low tension battery is A15 Rate P4 is B15.
Specifically, after secondary electricity 5 enters electrical power shaping modes, SOC value, the electrokinetic cell of low tension battery can be obtained SOC value, vehicle demand power P2 (vehicle driving power P11 and the sum of electric equipment power P 21), then, judge low pressure store Whether the SOC value of battery is more than default low battery threshold value.
If the SOC value of low tension battery is more than default low battery threshold value, the SOC value change speed of electrokinetic cell is obtained Rate, and the charge power P3 of electrokinetic cell corresponding to the SOC value rate of change of electrokinetic cell is inquired about, to select suitable charging Power P 3 enables the SOC value of electrokinetic cell to rise, and determines whether the charge power P3 of electrokinetic cell is less than and start Minimum output power Pmin and vehicle demand power P2 difference corresponding to the optimal economic region of machine, if it is, i.e. P3 ＜ Pmin-P2, then by controlling engine to be generated electricity to adjust the generated output of auxiliary-motor, i.e., with minimum output power Pmin Control engine is run in minimum output power Pmin corresponding to optimal economic region, and with minimum corresponding to optimal economic region Power output Pmin subtracts vehicle demand power P2 power i.e. Pmin-P2 to power battery charging；If not, i.e. P3 >= Pmin-P2, then engine is obtained default optimal according to the charge power P3 of electrokinetic cell and vehicle demand power P2 sums Power output in economic zone, and the power output by controlling engine to obtain is generated electricity to adjust the hair of auxiliary-motor Electrical power, i.e., corresponding power output is searched in the default optimal economic region of engine, the power output of the acquisition can It is (P2+P3 or P11+P21+P3) for charge power P3 and vehicle demand power the P2 sum of electrokinetic cell, and controls engine Generated electricity with the power output of acquisition.
If the SOC value of low tension battery is less than or equal to default low battery threshold value, the SOC value for obtaining electrokinetic cell becomes Change speed, and inquire about the charge power P3 of electrokinetic cell corresponding to the SOC value rate of change of electrokinetic cell, it is suitable to select Charge power P3 enables the SOC value of electrokinetic cell to rise, and obtains the SOC value rate of change of low tension battery, and inquires about low The charge power P4 of low tension battery corresponding to the SOC value rate of change of battery is pressed, to select suitable charge power P4 The SOC value of low tension battery is increased, and determine whether the charge power P4 of low tension battery and filling for electrokinetic cell Whether the sum of electrical power P 3 is less than minimum output power Pmin corresponding to the optimal economic region of engine and vehicle demand power P2 difference.If it is, i.e. P3+P4 ＜ Pmin-P2, then by control engine with minimum output power Pmin generated electricity with The generated output of auxiliary-motor is adjusted, that is, controls engine to be run in minimum output power Pmin corresponding to optimal economic region, and Vehicle demand power P2 power i.e. Pmin-P2 is subtracted to power electric with minimum output power Pmin corresponding to optimal economic region Pond and low tension battery charging；If not, i.e. P3+P4 >=Pmin-P2, then store according to the charge power P3 of electrokinetic cell, low pressure Charge power P4 and vehicle demand power the P2 sum of battery obtain output work of the engine in default optimal economic region Rate, and the power output by controlling engine to obtain are generated electricity to adjust the generated output of auxiliary-motor, that is, are being started Corresponding power output is searched in the default optimal economic region of machine, the power output of the acquisition can be the charging of electrokinetic cell Power P 3, the charge power P4 of low tension battery and vehicle demand power P2 sums are (P2+P3+P4 or P11+P21+P3+ P4), and the power output that controls engine to obtain is generated electricity.
Thus, in low speed, engine can be operated in economic zone, and only generate electricity and be not involved in driving, so as to without using from Clutch, clutch abrasion or sliding wear are reduced, while reduce pause and transition in rhythm or melody sense, improve comfortableness, and reduce oil consumption, reduction is started Machine noise, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.
As described above, as shown in figure 21, the electricity-generating control method of the hybrid vehicle of the utility model embodiment includes Following steps：
S601：Obtain the SOC value M of electrokinetic cell and the vehicle velocity V of hybrid vehicle.
S602：Judge whether the vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed V1.
If it is, perform step S603；If it is not, then perform step S604.
S603：Judge whether the SOC value M of electrokinetic cell is less than or equal to the first preset value M1.
If it is, perform step S607；If it is not, then perform step S606.
S604：Judge whether the SOC value M of electrokinetic cell is less than or equal to the first preset value M1.
If it is, perform step S605；If it is not, then perform step S606.
S605：Engine is controlled to participate in driving.
S606：Control engine does not drive auxiliary-motor to generate electricity.
S607：Obtain the gas pedal depth D of hybrid vehicle and the vehicle resistance F of hybrid vehicle.
S608：Judge whether gas pedal depth D is more than the vehicle resistance of the first predetermined depth D1 or hybrid vehicle Whether the SOC value M whether power F is more than the first default resistance F1 or electrokinetic cell is less than default limiting value M2.
If it is, perform step S605；If it is not, then perform step S609.
S609：Obtain the vehicle demand power P2 of hybrid vehicle.
S610：Judge whether vehicle demand power P2 is less than or equal to the maximum allowable generated output Pmax of auxiliary-motor.
If it is, perform step S611；If it is not, then perform step S605.
S611：Control driven by engine auxiliary-motor is generated electricity, and engine is not involved in driving.Now, auxiliary-motor is controlled Into generated output shaping modes.
S612：Judge whether the SOC value of low tension battery is less than or equal to default low battery threshold value.
If it is, perform step S617；If it is not, then perform step S613.
S613：The charge power P3 of electrokinetic cell is obtained according to the SOC value rate of change of electrokinetic cell.
S614：Judge whether the charge power P3 of electrokinetic cell is minimum defeated less than corresponding to the optimal economic region of engine Go out power P min and vehicle demand power P2 difference.
If it is, perform step S615；If it is not, then perform step S616.
S615：By controlling engine to be generated electricity with minimum output power Pmin to adjust the generating work(of auxiliary-motor Rate.
S616：According to the charge power P3 of electrokinetic cell and vehicle demand power P2 sums obtain engine it is default most Power output in good economic zone, and the power output by controlling engine to obtain is generated electricity to adjust auxiliary-motor Generated output.
S617：The charge power P4 of low tension battery is obtained according to the SOC value rate of change of low tension battery.
S618：The charge power P3 of electrokinetic cell is obtained according to the SOC value rate of change of electrokinetic cell.
S619：Judge low tension battery charge power P4 and electrokinetic cell charge power P3 sums whether be less than start Minimum output power Pmin and vehicle demand power P2 difference corresponding to the optimal economic region of machine.
If it is, perform step S620；If it is not, then perform step S621.
S620：By controlling engine to be generated electricity with minimum output power Pmin to adjust the generating work(of auxiliary-motor Rate.
S621：According to the charge power P3 of electrokinetic cell, the charge power P4 of low tension battery and vehicle demand power P2 Sum obtains power output of the engine in default optimal economic region, and the output work by controlling engine to obtain Rate is generated electricity to adjust the generated output of auxiliary-motor.
To sum up, the electricity-generating control method of the hybrid vehicle proposed according to the utility model embodiment, power electric is obtained The speed of the SOC value in pond, the SOC value of low tension battery and hybrid vehicle, and the SOC value according to electrokinetic cell and mixing The speed control auxiliary-motor of power vehicle enters generated output shaping modes, so that engine operates in default optimal economic area Domain, after auxiliary-motor enters generated output shaping modes, the generated output of auxiliary-motor is entered always according to the SOC value of low tension battery Row regulation, so as to make engine be not involved in driving in low speed, and then without using clutch, reduce clutch abrasion or cunning Mill, while reduce pause and transition in rhythm or melody sense, comfortableness is improved, and engine can be made to be operated in economic zone in low speed, only send out Electricity does not drive, and reduces oil consumption, reduces engine noise, maintains vehicle low speed electric equilibrium and low speed ride comfort, lifts vehicle performance.
Hybrid vehicle and its dynamical system based on above-described embodiment, the utility model embodiment also propose another The electricity-generating control method of hybrid vehicle.
Figure 22 is the flow chart according to the electricity-generating control method of the hybrid vehicle of the utility model embodiment.Such as Figure 22 It is shown, the electricity-generating control method of hybrid vehicle, comprise the following steps：
S31：Obtain the SOC value of electrokinetic cell and speed, the hybrid power vapour of hybrid vehicle of hybrid vehicle The SOC value of the low tension battery of car；
It should be noted that the SOC value of electrokinetic cell and low can be gathered by the battery management system of hybrid vehicle The SOC value of battery is pressed, so as to obtain the SOC value of electrokinetic cell and the SOC value of low tension battery.
S32：Controlled and mixed according to the speed of the SOC value of electrokinetic cell, the SOC value of low tension battery and hybrid vehicle The generated output of the auxiliary-motor of power vehicle；
S33：The generated output of the engine of hybrid vehicle is obtained according to the generated output of auxiliary-motor, is started with control Machine operates in default optimal economic region, wherein, auxiliary-motor is generated electricity under the drive of engine.
It should be noted that the default optimal economic region that engine's fuel consumption characteristics loop image determines engine can be combined. As Fig. 7 show an example of engine's fuel consumption characteristics loop image, wherein, side ordinate is the output torque of engine, horizontal Coordinate is the rotating speed of engine, and curve a is the fuel-economy curve of engine.Region corresponding to fuel-economy curve is to start The optimal economic region of machine, that is, say when the torque of engine and moment of torsion are located on the fuel-economy curve of engine optimum, send out Motivation is in optimal economic region.Thus, in the utility model embodiment, can be turned round by the rotating speed and output for controlling engine Square falls in engine fuel economic curve for example on curve a, so that engine operates in default optimal economic region.
Specifically, during hybrid electric vehicle is sailed, engine can output power to mixing by clutch The wheel of power vehicle, and engine can also drive auxiliary-motor to be generated electricity.Thus, the power output of engine mainly includes Two parts, part output to auxiliary-motor, that is, the generated output for driving auxiliary-motor to be generated electricity, another part are exported to car Wheel, the i.e. driving power of driving moment.
, can the SOC value of electrokinetic cell, the SOC value of low tension battery first when driven by engine auxiliary-motor is generated electricity With the speed of hybrid vehicle, then according to the SOC value of electrokinetic cell, the SOC value of low tension battery and hybrid vehicle Speed control auxiliary-motor generated output, and further according to the generated output of auxiliary-motor obtain engine generated output, To control engine to operate in default optimal economic region.In other words, control module can be to be operated in engine default The generated output of auxiliary-motor is controlled on the premise of optimal economic region.
Thereby, it is possible to make engine be operated in default optimal economic region, because engine is in default optimal economic The oil consumption in region is minimum, fuel economy highest, so as to reduce the oil consumption of engine, reduces the noise of engine, improves whole The economy of car operation.Auxiliary-motor has higher generated output and generating efficiency when being additionally, since low speed, so as to meet The power demand run at a low speed, vehicle low speed electric equilibrium can be maintained, maintain vehicle low speed ride comfort, lift the dynamic property of vehicle Energy.Wherein, by power battery charging, it can be ensured that the power demand of power motor and high-voltage electrical equipment, and then ensure to move Force motor drives vehicle normally travel, also, by being charged to low tension battery, it can be ensured that the electricity consumption of low voltage equipment needs Ask, and vehicle low pressure can be realized by low tension battery when auxiliary-motor stops generating and electrokinetic cell failure or not enough power supply Power supply, and then ensure that vehicle can realize pure fuel oil pattern traveling, improve vehicle distance travelled.
Further, according to one embodiment of the present utility model, when the SOC value of electrokinetic cell is more than default limiting value And when being less than or equal to the first preset value, if the speed of hybrid vehicle is less than the first preset vehicle speed, to the hair of auxiliary-motor Electrical power is controlled.
Wherein, the first preset value can be the upper bound limit value of the SOC value of the electrokinetic cell pre-set, for example, stop charging Decision content, be preferably 30%.Default limiting value can be the lower bound limit value of the SOC value of the electrokinetic cell pre-set, example It is preferably 10% such as to stop the decision content of electric discharge.Can be by electrokinetic cell according to the first preset value and default limiting value SOC value is divided into three sections, i.e. the first electricity section, the second electricity section and the 3rd electricity section, as the SOC of electrokinetic cell When value is less than or equal to default limiting value, the SOC value of electrokinetic cell is in the first electricity section, and now electrokinetic cell only charges Do not discharge；When the SOC value of electrokinetic cell is more than default limiting value and is less than or equal to the first preset value, electrokinetic cell SOC value is in the second electricity section, and now electrokinetic cell has charge requirement, you can actively to power battery charging；Work as power When the SOC value of battery is more than the first preset value, the SOC value of electrokinetic cell is in the 3rd electricity section, and now electrokinetic cell can not Charging, i.e., will not actively give power battery charging.
Specifically, after the SOC value and the speed of hybrid vehicle for obtaining electrokinetic cell, it can determine whether electrokinetic cell SOC value residing for section, if the SOC value of electrokinetic cell is in middle electricity section, the SOC value of electrokinetic cell is more than default Limiting value and be less than or equal to the first preset value, then explanation electrokinetic cell can be charged, now determine whether to mix Whether the speed of power vehicle is less than the first preset vehicle speed, if the speed of hybrid vehicle is less than the first preset vehicle speed, The generated output of auxiliary-motor is controlled, now the speed of hybrid vehicle is relatively low, and required driving force is less, power electric Machine is enough to drive hybrid electric vehicle to sail, and engine only can drive auxiliary-motor to be generated electricity, and be not involved in driving.
Thus, in low speed, engine only generates electricity and is not involved in driving, and can reduce clutch abrasion or sliding wear, reduce simultaneously Pause and transition in rhythm or melody sense, improves comfortableness.
Further, when the SOC value of electrokinetic cell is more than default limiting value and less than or equal to the first preset value and mixes When the speed of conjunction power vehicle is less than the first preset vehicle speed, the vehicle demand power of hybrid vehicle is also obtained, and in vehicle When demand power is less than or equal to the maximum allowable generated output of auxiliary-motor, the generated output of auxiliary-motor is controlled.
That is, be more than default limiting value in the SOC value for judging electrokinetic cell and be less than or equal to the first preset value, And the speed of hybrid vehicle is less than after the first preset vehicle speed, can also determine whether vehicle demand power is more than The maximum allowable generated output of auxiliary-motor, if vehicle demand power is less than or equal to the maximum allowable generated output of auxiliary-motor, The generated output of auxiliary-motor is controlled, now, the driving force needed for vehicle is less, and vehicle demand power is smaller, power Motor is enough to drive hybrid electric vehicle to sail, and engine only can drive auxiliary-motor to be generated electricity, and be not involved in driving.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
Further, when the SOC value of electrokinetic cell is more than default limiting value and less than or equal to the first preset value, mixing The speed of power vehicle is less than the first preset vehicle speed and vehicle demand power is less than or equal to the maximum allowable generated output of auxiliary-motor When, the gas pedal depth of hybrid vehicle and the vehicle resistance of hybrid vehicle are also obtained, and in gas pedal depth When being less than or equal to the first default resistance less than or equal to the vehicle resistance of the first predetermined depth and hybrid vehicle, to auxiliary-motor Generated output is controlled.
It should be noted that the car resistance that the vehicle resistance of hybrid vehicle can be hybrid vehicle for example rolls Resistance, acceleration resistance, grade resistance and air drag etc..
That is, be more than default limiting value in the SOC value for judging electrokinetic cell and be less than or equal to the first preset value, And the speed of hybrid vehicle is less than the first preset vehicle speed, and vehicle demand power is less than or equal to the maximum allowable hair of auxiliary-motor After electrical power, it can also determine whether gas pedal depth is more than the whole of the first predetermined depth and hybrid vehicle Whether car resistance is more than the first default resistance, if gas pedal depth is less than or equal to the first predetermined depth and hybrid vehicle Vehicle resistance be less than or equal to the first default resistance, then the generated output of auxiliary-motor is controlled, now, the drive needed for vehicle Power is less, and vehicle demand power is smaller, and gas pedal depth is smaller, and vehicle resistance is also smaller, and power motor is enough to drive Hybrid electric vehicle is sailed, and engine only can drive auxiliary-motor to be generated electricity, and be not involved in driving.
Thus, in low speed, engine only generates electricity and is not involved in driving, and because engine is not involved in driving, clutch need not make With so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improve comfortableness.
As described above, when hybrid vehicle is run at a low speed, engine can only generate electricity and be not involved in driving, and enter due to starting Machine is not involved in driving, and clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving Comfortableness, also, engine is operated in economic zone in low speed, because engine is in default optimal economic region Oil consumption is minimum, fuel economy highest, so as to reduce oil consumption, reduces engine noise, improves the economy of vehicle operation, from And vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.
According to a specific embodiment of the present utility model, when control engine individually drives auxiliary-motor to be generated electricity, simultaneously Control power motor alone output driving power when, according to below equation obtain engine generated output：
P0=P1/ η/ζ
Wherein, P0 is the generated output of engine, and P1 is the generated output of auxiliary-motor, and η Belt Transmission Efficiencies, ζ is secondary electricity The efficiency of machine.
That is, engine can only generate electricity be not involved in driving in the case of, control module can be according to the hair of auxiliary-motor The efficiency ζ of electrical power, Belt Transmission Efficiency η and auxiliary-motor calculates the generated output P0 of engine, and controls engine to obtain The generated output P0 taken drives auxiliary-motor to be generated electricity, to control the generated output of auxiliary-motor.
In addition, according to one embodiment of the present utility model, according to one embodiment of the present utility model, in electrokinetic cell SOC value be less than the speed of default limiting value or hybrid vehicle and be more than or equal to the first preset vehicle speed or vehicle and need Power is asked to be more than the first predetermined depth or mixing more than the maximum allowable generated output or gas pedal depth of auxiliary-motor When the vehicle resistance of power vehicle is more than the first default resistance, control engine participates in driving.
That is, the SOC value in electrokinetic cell is more than less than the speed of default limiting value or hybrid vehicle Equal to the maximum allowable generated output or gas pedal depth that the first preset vehicle speed or vehicle demand power are more than auxiliary-motor When degree is more than the first default resistance more than the vehicle resistance of the first predetermined depth or hybrid vehicle, control module control Engine participates in driving, and now, electrokinetic cell no longer discharges, the driving force needed for vehicle is larger, vehicle demand power is larger, oily Door tread depths are larger or vehicle resistance is also larger, and power motor is not enough to drive hybrid electric vehicle to sail, and engine participates in Drive to carry out supplying driving.
Thus, engine can participate in driving in the driving force deficiency that power motor exports, so that it is guaranteed that the normal row of vehicle Sail, improve the power performance of vehicle, improve the distance travelled of vehicle.
More specifically, when vehicle demand power is more than the maximum allowable generated output of auxiliary-motor, engine ginseng is also controlled With driving so that engine outputs power to the wheel of hybrid vehicle by clutch
Also, when the SOC value of electrokinetic cell is less than or equal to default limiting value, also control engine participate in drive so that Engine outputs power to the wheel of hybrid vehicle by clutch；When the SOC value of electrokinetic cell is less than or equal to first When preset value, the speed of hybrid vehicle are less than the first preset vehicle speed and gas pedal depth and are more than the first predetermined depth, and also Engine is controlled to participate in driving so that engine outputs power to wheel by clutch；When the SOC value of electrokinetic cell is less than Speed equal to the first preset value, hybrid vehicle is more than less than the vehicle resistance of the first preset vehicle speed and hybrid vehicle During the first default resistance, engine is also controlled to participate in driving so that engine outputs power to wheel by clutch.
That is, the SOC value of electrokinetic cell, the gas pedal depth of hybrid vehicle, speed, whole can be obtained in real time Car resistance and vehicle demand power, and SOC value to electrokinetic cell, the gas pedal depth of hybrid vehicle, speed and Vehicle resistance is judged：
First, when the SOC value of electrokinetic cell is less than default limiting value, because of the low battery of electrokinetic cell, power electric Pond can not provide enough electric energy, control engine and power motor to simultaneously participate in driving, now also controllable driven by engine Auxiliary-motor is generated electricity, and by controlling the generated output of engine that engine can be made to be operated in default optimal economic area Domain.
Second, when the SOC value of electrokinetic cell is pre- less than first less than or equal to the speed of the first preset value, hybrid vehicle If speed and when gas pedal depth is more than the first predetermined depth, because gas pedal depth is deeper, control module control engine Driving is simultaneously participated in power motor, now also controllable driven by engine auxiliary-motor is generated electricity, and is started by control The generated output of machine can make engine be operated in default optimal economic region.
Third, when the SOC value of electrokinetic cell is pre- less than first less than or equal to the speed of the first preset value, hybrid vehicle If the vehicle resistance of speed and hybrid vehicle is more than the first default resistance, because vehicle resistance is larger, control module control Engine and power motor simultaneously participate in driving, and now also controllable driven by engine auxiliary-motor is generated electricity, and passes through control The generated output of engine processed can make engine be operated in default optimal economic region.
Thus, engine can participate in driving in the driving force deficiency that power motor exports, so that it is guaranteed that the normal row of vehicle Sail, improve the power performance of vehicle, improve the distance travelled of vehicle.Also, controllable engine is operated in economic zone, Because oil consumption of the engine 1 in default optimal economic region is minimum, fuel economy highest, so as to reduce oil consumption, reduce Engine noise, improve vehicle economic performance.
In addition, control module is additionally operable to：When the SOC value of electrokinetic cell is less than or equal to default limiting value, and hybrid power When the speed of automobile is more than the first preset vehicle speed, control engine participates in driving so that engine is outputed power by clutch To wheel.
Thus, engine can participate in driving in the driving force deficiency that power motor exports, so that it is guaranteed that the normal row of vehicle Sail, improve the power performance of vehicle, improve the distance travelled of vehicle.
However, it is to be understood that control module is additionally operable to：When the SOC value of electrokinetic cell is more than the first preset value, hair Motivation does not drive auxiliary-motor to be generated electricity, and now the electricity of electrokinetic cell is close to full electricity, and without charging, engine does not drive secondary electricity Machine is generated electricity.That is, when the electricity of electrokinetic cell is close full electric, engine does not drive auxiliary-motor to be generated electricity, from And auxiliary-motor is not to power battery charging.
Furthermore, can be to the generated output of auxiliary-motor when engine, which only drives auxiliary-motor to generate electricity, is not involved in driving It is adjusted, the generated output control process of the utility model embodiment is specifically described below.
According to one embodiment of the present utility model, always according to vehicle demand power, the electrokinetic cell of hybrid vehicle Charge power and the charge power of low tension battery the generated output of auxiliary-motor is controlled.
Specifically, according to the vehicle demand power of hybrid vehicle, the charge power and low tension battery of electrokinetic cell Charge power control auxiliary-motor generated output formula it is as follows：
P1=P2+P3+P4, wherein, P2=P11+P21,
P1 is the generated output of auxiliary-motor, and P2 is vehicle demand power, and P3 is the charge power of electrokinetic cell, and P4 is low pressure The charge power of battery, P11 are vehicle driving power, and P21 is electric equipment power.
It should be noted that electric equipment includes the first electric equipment and the second electric equipment, i.e. electric equipment power P 21 It may include high-voltage electrical equipment and the power needed for low voltage equipment.
It should be noted that vehicle driving power P11 may include the power output of power motor, can be according to power motor The rotating speed of default throttle-torque curve and power motor obtains vehicle driving power P11, wherein, preset throttle-torque curve It can be determined when hybrid electric vehicle power matches；Electric equipment work(can be obtained in real time according to the electric equipment that vehicle is run Rate P21, such as electric equipment power P 21 is calculated by DC consumption in bus；It can be obtained according to the SOC value of electrokinetic cell dynamic The charge power P3 of power battery, and according to the charge power P4 of the SOC value of low tension battery acquisition low tension battery.
Specifically, during hybrid electric vehicle is sailed, charge power P3, the low pressure electric power storage of electrokinetic cell can be obtained Charge power P4, vehicle driving power P11 and the electric equipment power P 21 in pond, and by the charge power P3 of electrokinetic cell, low pressure Generated outputs of the charge power P4, vehicle driving power P11 and the sum of electric equipment power P 21 of battery as auxiliary-motor P1, thus, the generated output of auxiliary-motor can be controlled according to the P1 values calculated, such as can be according to the P1 values calculated The output torque and rotating speed of engine are controlled, are controlled with the power to be generated electricity to engine auxiliary-motor.
Further, according to one embodiment of the present utility model, the generated output of auxiliary-motor is controlled, including： The SOC value rate of change of electrokinetic cell is obtained, and it is corresponding most with the optimal economic region of engine according to vehicle demand power The SOC value rate of change of relation and electrokinetic cell, the SOC value of low tension battery, low tension battery between small power output SOC value rate of change control auxiliary-motor generated output.
It should be appreciated that the SOC value rate of change of electrokinetic cell can be obtained according to the SOC value of electrokinetic cell, for example, often Individual time interval t gathers the SOC value of an electrokinetic cell, so can by the current SOC value of electrokinetic cell and previous SOC values it SOC value rate of change of difference and time interval the t ratio as electrokinetic cell.Similarly, can be according to the SOC value of low tension battery The SOC value rate of change of low tension battery is obtained, for example, each time interval t gathers the SOC value of a low tension battery, such as This can be using the difference of the current SOC value of low tension battery and previous SOC value and time interval t ratio as low tension battery SOC value rate of change.
Specifically, the optimal economic region of engine can be determined according to the universal characteristic curve of engine shown in Fig. 7, is entered And minimum output power corresponding to the optimal economic region of engine is obtained, it is determined that corresponding to the optimal economic region of engine After minimum output power, you can according to vehicle demand power P2 minimum output works corresponding with the optimal economic region of engine The SOC value rate of change of relation and electrokinetic cell, the SOC value of low tension battery, low tension battery between rate Pmin SOC value rate of change controls the generated output of auxiliary-motor.
Thus, when hybrid vehicle is run at a low speed, engine is operated in economic zone, oil consumption can be reduced, reduce Engine noise, the economic performance of vehicle is improved, also, in low speed, engine only generating can be not involved in driving, due to starting Machine is not involved in driving, and clutch is without using so as to reduce clutch abrasion or sliding wear, while reducing pause and transition in rhythm or melody sense, improving Comfortableness, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.
It is described further below when engine only drives auxiliary-motor generating to be not involved in driving, according to vehicle demand power P2 The SOC value change of relation and electrokinetic cell between minimum output power Pmin corresponding with the optimal economic region of engine Speed, the SOC value of low tension battery, the SOC value rate of change of low tension battery control the specific control of the generated output of auxiliary-motor Mode processed.
Specifically, when the SOC value of low tension battery is more than default low battery threshold value, according to the SOC value of electrokinetic cell Rate of change obtains the charge power of electrokinetic cell, and judges whether the charge power of electrokinetic cell is less than the optimal warp of engine The difference of minimum output power and vehicle demand power corresponding to Ji region, wherein, if the charge power of electrokinetic cell is less than hair The difference of minimum output power and vehicle demand power corresponding to the optimal economic region of motivation, then by control engine with this most Small power output is generated electricity to control the generated output of auxiliary-motor；If the charge power of electrokinetic cell is more than or equal to engine Optimal economic region corresponding to the difference of minimum output power and vehicle demand power, then according to the charge power of electrokinetic cell with Vehicle demand power sum obtains power output of the engine in default optimal economic region, and by control engine with The power output of acquisition is generated electricity to control the generated output of auxiliary-motor.
Specifically, when the SOC value of low tension battery is less than or equal to default low battery threshold value, low tension battery is obtained The SOC value rate of change of SOC value changes speed and electrokinetic cell, and it is low according to the acquisition of the SOC value rate of change of low tension battery Press the charge power of battery and the charge power of electrokinetic cell is obtained according to the SOC value rate of change of electrokinetic cell, and sentence Whether the charge power of disconnected low tension battery and the charge power sum of electrokinetic cell are less than the optimal economic region pair of engine The minimum output power and the difference of vehicle demand power answered, wherein, if the charge power of low tension battery and electrokinetic cell Charge power sum is then led to less than the difference of minimum output power and vehicle demand power corresponding to the optimal economic region of engine Control engine is crossed to be generated electricity with the minimum output power to control the generated output of auxiliary-motor；If low tension battery fills Electrical power minimum output power corresponding with the optimal economic region that the charge power sum of electrokinetic cell is more than or equal to engine And the difference of vehicle demand power, then according to the charge power of electrokinetic cell, the charge power of low tension battery and vehicle demand work( Rate sum obtains power output of the engine in default optimal economic region, and defeated with what is obtained by controlling engine Go out power to be generated electricity to control the generated output of auxiliary-motor.
It should be noted that the charging of the SOC value rate of change and electrokinetic cell for the electrokinetic cell that can be prestored in control module The first relation table between power P 3, thus, after the SOC value rate of change of electrokinetic cell is obtained, closed by comparing first It is the charge power P3 of electrokinetic cell corresponding to table can obtain.For example, the SOC value rate of change and electrokinetic cell of electrokinetic cell Charge power P3 between the first relation table can be as shown in table 1 below.
Table 1
The SOC value rate of change of electrokinetic cell A1 A2 A3 A4 A5
The charge power of electrokinetic cell B1 B2 B3 B4 B5
From upper table 1, the charging of corresponding electrokinetic cell can be obtained when the SOC value rate of change of electrokinetic cell is A1 Power P 3 is B1；The charge power P3 of electrokinetic cell is corresponding to being obtained when the SOC value rate of change of electrokinetic cell is A2 B2；The charge power P3 of electrokinetic cell is B3 corresponding to being obtained when the SOC value rate of change of electrokinetic cell is A3；When dynamic The SOC value rate of change of power battery can obtain corresponding electrokinetic cell charge power P3 when being A4 is B4；When electrokinetic cell SOC value rate of change can obtain corresponding electrokinetic cell charge power P3 when being A5 is B5.
Similarly, can prestore the SOC value rate of change of low tension battery and the charging work(of low tension battery in control module The second relation table between rate P4, thus, after the SOC value rate of change of low tension battery is obtained, closed by comparing second It is the charge power P4 of low tension battery corresponding to table can obtain.For example, the SOC value rate of change and low pressure of low tension battery The first relation table between the charge power P4 of battery can be as shown in table 2 below.
Table 2
The SOC value rate of change of low tension battery A11 A12 A13 A14 A15
The charge power of low tension battery B11 B12 B13 B14 B15
From upper table 2, corresponding low tension battery can be obtained when the SOC value rate of change of low tension battery is A11 Charge power P4 be B11；Low tension battery corresponding to being obtained when the SOC value rate of change of low tension battery is A12 Charge power P4 is B12；Low tension battery fills corresponding to being obtained when the SOC value rate of change of low tension battery is A13 Electrical power P 4 is B13；The charging of low tension battery corresponding to being obtained when the SOC value rate of change of low tension battery is A14 Power P 4 is B14；The charging work(of low tension battery corresponding to being obtained when the SOC value rate of change of low tension battery is A15 Rate P4 is B15.
Specifically, after secondary electricity 5 enters electrical power shaping modes, SOC value, the electrokinetic cell of low tension battery can be obtained SOC value, vehicle demand power P2 (vehicle driving power P11 and the sum of electric equipment power P 21), then, judge low pressure store Whether the SOC value of battery is more than default low battery threshold value.
If the SOC value of low tension battery is more than default low battery threshold value, the SOC value change speed of electrokinetic cell is obtained Rate, and the charge power P3 of electrokinetic cell corresponding to the SOC value rate of change of electrokinetic cell is inquired about, to select suitable charging Power P 3 enables the SOC value of electrokinetic cell to rise, and determines whether the charge power P3 of electrokinetic cell is less than and start Minimum output power Pmin and vehicle demand power P2 difference corresponding to the optimal economic region of machine, if it is, i.e. P3 ＜ Pmin-P2, then by controlling engine to be generated electricity to control the generated output of auxiliary-motor, i.e., with minimum output power Pmin Control engine is run in minimum output power Pmin corresponding to optimal economic region, and with minimum corresponding to optimal economic region Power output Pmin subtracts vehicle demand power P2 power i.e. Pmin-P2 to power battery charging；If not, i.e. P3 >= Pmin-P2, then engine is obtained default optimal according to the charge power P3 of electrokinetic cell and vehicle demand power P2 sums Power output in economic zone, and the power output by controlling engine to obtain is generated electricity to control the hair of auxiliary-motor Electrical power, i.e., corresponding power output is searched in the default optimal economic region of engine, the power output of the acquisition can It is (P2+P3 or P11+P21+P3) for charge power P3 and vehicle demand power the P2 sum of electrokinetic cell, and controls engine Generated electricity with the power output of acquisition.
If the SOC value of low tension battery is less than or equal to default low battery threshold value, the SOC value for obtaining electrokinetic cell becomes Change speed, and inquire about the charge power P3 of electrokinetic cell corresponding to the SOC value rate of change of electrokinetic cell, it is suitable to select Charge power P3 enables the SOC value of electrokinetic cell to rise, and obtains the SOC value rate of change of low tension battery, and inquires about low The charge power P4 of low tension battery corresponding to the SOC value rate of change of battery is pressed, to select suitable charge power P4 The SOC value of low tension battery is increased, and determine whether the charge power P4 of low tension battery and filling for electrokinetic cell Whether the sum of electrical power P 3 is less than minimum output power Pmin corresponding to the optimal economic region of engine and vehicle demand power P2 difference.If it is, i.e. P3+P4 ＜ Pmin-P2, then by control engine with minimum output power Pmin generated electricity with The generated output of auxiliary-motor is controlled, that is, controls engine to be run in minimum output power Pmin corresponding to optimal economic region, and Vehicle demand power P2 power i.e. Pmin-P2 is subtracted to power electric with minimum output power Pmin corresponding to optimal economic region Pond and low tension battery charging；If not, i.e. P3+P4 >=Pmin-P2, then store according to the charge power P3 of electrokinetic cell, low pressure Charge power P4 and vehicle demand power the P2 sum of battery obtain output work of the engine in default optimal economic region Rate, and the power output by controlling engine to obtain are generated electricity to control the generated output of auxiliary-motor, that is, are being started Corresponding power output is searched in the default optimal economic region of machine, the power output of the acquisition can be the charging of electrokinetic cell Power P 3, the charge power P4 of low tension battery and vehicle demand power P2 sums are (P2+P3+P4 or P11+P21+P3+ P4), and the power output that controls engine to obtain is generated electricity.
Thus, in low speed, engine can be operated in economic zone, and only generate electricity and be not involved in driving, so as to without using from Clutch, clutch abrasion or sliding wear are reduced, while reduce pause and transition in rhythm or melody sense, improve comfortableness, and reduce oil consumption, reduction is started Machine noise, and then vehicle low speed electric equilibrium and low speed ride comfort are maintained, lift vehicle performance.
As above, as shown in figure 23, the electricity-generating control method of the hybrid vehicle of the utility model embodiment includes following Step：
S701：Obtain the SOC value M of electrokinetic cell and the vehicle velocity V of hybrid vehicle.
S702：Judge whether the vehicle velocity V of hybrid vehicle is less than the first preset vehicle speed V1.
If it is, perform step S703；If it is not, then perform step S704.
S703：Judge whether the SOC value M of electrokinetic cell is less than or equal to the first preset value M1.
If it is, perform step S707；If it is not, then perform step S706.
S704：Judge whether the SOC value M of electrokinetic cell is less than or equal to the first preset value M1.
If it is, perform step S705；If it is not, then perform step S706.
S705：Engine is controlled to participate in driving.
S706：Control engine does not drive auxiliary-motor to generate electricity.
S707：Obtain the gas pedal depth D of hybrid vehicle and the vehicle resistance F of hybrid vehicle.
S708：Judge whether gas pedal depth D is more than the vehicle resistance of the first predetermined depth D1 or hybrid vehicle Whether the SOC value M whether power F is more than the first default resistance F1 or electrokinetic cell is less than default limiting value M2.
If it is, perform step S705；If it is not, then perform step S709.
S709：Obtain the vehicle demand power P2 of hybrid vehicle.
S710：Judge whether vehicle demand power P2 is less than or equal to the maximum allowable generated output Pmax of auxiliary-motor.
If it is, perform step S711；If it is not, then perform step S705.
S711：Control driven by engine auxiliary-motor is generated electricity, and engine is not involved in driving.
S712：Judge whether the SOC value of low tension battery is less than or equal to default low battery threshold value.
If it is, perform step S717；If it is not, then perform step S713.
S713：The charge power P3 of electrokinetic cell is obtained according to the SOC value rate of change of electrokinetic cell.
S714：Judge whether the charge power P3 of electrokinetic cell is minimum defeated less than corresponding to the optimal economic region of engine Go out power P min and vehicle demand power P2 difference.
If it is, perform step S715；If it is not, then perform step S716.
S715：By controlling engine to be generated electricity with minimum output power Pmin to control the generating work(of auxiliary-motor Rate.
S716：According to the charge power P3 of electrokinetic cell and vehicle demand power P2 sums obtain engine it is default most Power output in good economic zone, and the power output by controlling engine to obtain is generated electricity to control auxiliary-motor Generated output.
S717：The charge power P4 of low tension battery is obtained according to the SOC value rate of change of low tension battery.
S718：The charge power P3 of electrokinetic cell is obtained according to the SOC value rate of change of electrokinetic cell.
S719：Judge low tension battery charge power P4 and electrokinetic cell charge power P3 sums whether be less than start Minimum output power Pmin and vehicle demand power P2 difference corresponding to the optimal economic region of machine.
If it is, perform step S720；If it is not, then perform step S721.
S720：By controlling engine to be generated electricity with minimum output power Pmin to control the generating work(of auxiliary-motor Rate.
S721：According to the charge power P3 of electrokinetic cell, the charge power P4 of low tension battery and vehicle demand power P2 Sum obtains power output of the engine in default optimal economic region, and the output work by controlling engine to obtain Rate is generated electricity to control the generated output of auxiliary-motor.
To sum up, according to the electricity-generating control method of the hybrid vehicle of the utility model embodiment, hybrid power vapour is obtained The SOC value of the electrokinetic cell of car and the speed of hybrid vehicle, hybrid vehicle low tension battery SOC value, then The pair of hybrid vehicle is controlled according to the speed of the SOC value of electrokinetic cell, the SOC value of low tension battery and hybrid vehicle The generated output of motor, and the generated output of the engine according to the generated output of auxiliary-motor acquisition hybrid vehicle, with control Engine processed operates in default optimal economic region, wherein, auxiliary-motor is generated electricity under the drive of engine, so as to Make engine be not involved in driving in low speed, and then without using clutch, reduce clutch abrasion or sliding wear, while reduce and time Sense is frustrated, improves comfortableness, and engine can be made to be operated in economic zone in low speed, only generating electricity does not drive, and reduces oil Consumption, engine noise is reduced, maintain vehicle low speed electric equilibrium and low speed ride comfort, lift vehicle performance.
Finally, the utility model embodiment also proposed a kind of computer-readable recording medium, therein with being stored in Instruction, when executed, hybrid vehicle perform the electricity-generating control method of upper embodiment.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " suitable The orientation or position relationship of the instruction such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " are based on orientation shown in the drawings Or position relationship, be for only for ease of description the utility model and simplify and describe, rather than instruction or imply signified device or Element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limit of the present utility model System.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Implicitly include at least one this feature.In description of the present utility model, " multiple " are meant that at least two, such as two It is individual, three etc., unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be Mechanically connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be two The connection of element internal or the interaction relationship of two elements, limited unless otherwise clear and definite.For the common skill of this area For art personnel, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature Can be that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, first is special Sign second feature " on ", " top " and " above " can be fisrt feature directly over second feature or oblique upper, or only Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term State and be necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be with Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area Technical staff the different embodiments or example and the feature of different embodiments or example described in this specification can be entered Row combines and combination.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in the scope of the utility model It is interior above-described embodiment to be changed, changed, replaced and modification.

Claims (12)

  1. A kind of 1. dynamical system of hybrid vehicle, it is characterised in that including：
    Engine, engine output power to the wheel of the hybrid vehicle by clutch；
    Power motor, the power motor are used for the wheel for outputting driving force to the hybrid vehicle, wherein, it is described to start Machine and the power motor drive the same wheel of the hybrid vehicle jointly；
    Electrokinetic cell, the electrokinetic cell are used to power to the power motor；
    DC-DC converter；
    The auxiliary-motor being connected with the engine, the auxiliary-motor respectively with the power motor, the DC-DC converter and dynamic Power battery is connected, when the auxiliary-motor is generated electricity under the drive of the engine with realize to the power battery charging, To power motor power supply, at least one in DC-DC converter power supply.
  2. 2. the dynamical system of hybrid vehicle as claimed in claim 1, it is characterised in that the auxiliary-motor also includes first Controller, the power motor also include second controller, first controller respectively with the second controller, described dynamic Power battery is connected with the DC-DC converter.
  3. 3. the dynamical system of hybrid vehicle as claimed in claim 1 or 2, it is characterised in that the DC-DC converter is also It is connected with the electrokinetic cell.
  4. 4. the dynamical system of hybrid vehicle as claimed in claim 2, it is characterised in that the DC-DC converter is also logical The second controller is crossed with the power motor to be connected.
  5. 5. the dynamical system of hybrid vehicle as claimed in claim 1, it is characterised in that the DC-DC converter is also divided It is not connected with the first electric equipment in the hybrid vehicle and low tension battery with to first electric equipment and low Storage battery power supply is pressed, and the low tension battery is also connected with first electric equipment.
  6. 6. the dynamical system of hybrid vehicle as claimed in claim 2, it is characterised in that first controller, described Second controller and the electrokinetic cell are also connected with the second electric equipment in the hybrid vehicle respectively.
  7. 7. the dynamical system of hybrid vehicle as claimed in claim 1, it is characterised in that the auxiliary-motor is BSG motors.
  8. 8. the dynamical system of hybrid vehicle as claimed in claim 1, it is characterised in that also including main reducing gear and first Speed changer, wherein, the engine is output power to by the clutch, first speed changer, the main reducing gear First wheel of the hybrid vehicle, the power motor output driving force to the mixing by the main reducing gear and moved First wheel of power automobile.
  9. 9. the dynamical system of hybrid vehicle as claimed in claim 8, it is characterised in that the clutch and described first Speed changer is integrally disposed.
  10. A kind of 10. dynamical system of hybrid vehicle, it is characterised in that including：
    Engine, engine output power to the wheel of the hybrid vehicle by double clutch；
    First input shaft and the second input shaft, second input shaft are coaxially set on first input shaft, wherein, institute Engine is stated to be arranged to be selectively engageable in first input shaft and second input shaft by the double clutch One, be provided with gear driving gear on each input shaft in first input shaft and second input shaft；
    First output shaft and the second output shaft, first output shaft and second output shaft are parallel with first input shaft Set, be provided with gear driven gear on each output shaft in first output shaft and the second output shaft, the gear from Moving gear accordingly engages with the gear driving gear；
    Motor power axle, the motor power axle are arranged to and a linkage in first output shaft and the second output shaft；
    Power motor, the power motor are arranged to link with the motor power axle, and the power motor is used for output driving Power to the hybrid vehicle wheel, wherein, the engine and the power motor drive the hybrid power jointly The same wheel of automobile；
    Electrokinetic cell, the electrokinetic cell are used to power to the power motor；
    DC-DC converter；
    The auxiliary-motor being connected with the engine, the auxiliary-motor respectively with the power motor, the DC-DC converter and dynamic Power battery is connected, when the auxiliary-motor is generated electricity under the drive of the engine with realize to the power battery charging, To power motor power supply, at least one in DC-DC converter power supply.
  11. A kind of 11. dynamical system of hybrid vehicle, it is characterised in that including：
    Engine, engine output power to the wheel of the hybrid vehicle by double clutch；
    First input shaft and the second input shaft, second input shaft are coaxially set on first input shaft, wherein, institute Engine is stated to be arranged to be selectively engageable in first input shaft and second input shaft by the double clutch One, be provided with gear driving gear on each input shaft in first input shaft and second input shaft；
    First output shaft and the second output shaft, first output shaft and second output shaft are parallel with first input shaft Set, be provided with gear driven gear on each output shaft in first output shaft and the second output shaft, the gear from Moving gear accordingly engages with the gear driving gear, an overhead in first output shaft and second output shaft Set is provided with least one reverse output gear and is additionally provided with the reverse gear synchronizer for engaging the reverse output gear；
    Reverse gear shaft, the reverse gear shaft be arranged to one in first input shaft and second input shaft linkage and also with At least one reverse output gear linkage；
    Motor power axle, the motor power axle overhead set are provided with motor power axle first gear and the tooth of motor power axle second Take turns, be additionally provided with the motor power axle positioned at the motor power axle first gear and the motor power axle second gear Between motor power axle synchronizer, wherein the motor power axle second gear is arranged to and one of gear driven gear Linkage, the motor power axle first gear are engaged with the main reducing gear driven gear of the hybrid vehicle to transmit driving Power to the hybrid vehicle wheel；
    Power motor, the power motor are arranged to link with the motor power axle, and the power motor is used for output driving Power, wherein, the engine and the power motor drive the same wheel of the hybrid vehicle jointly；
    Electrokinetic cell, the electrokinetic cell are used to power to the power motor；
    DC-DC converter；
    The auxiliary-motor being connected with the engine, the auxiliary-motor respectively with the power motor, the DC-DC converter and dynamic Power battery is connected, when the auxiliary-motor is generated electricity under the drive of the engine with realize to the power battery charging, To power motor power supply, at least one in DC-DC converter power supply.
  12. 12. a kind of hybrid vehicle, it is characterised in that including the hybrid power vapour as any one of claim 1-11 The dynamical system of car.
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Cited By (7)

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Publication number Priority date Publication date Assignee Title
WO2018177356A1 (en) * 2017-03-31 2018-10-04 比亚迪股份有限公司 Hybrid electric vehicle and power system thereof, and power generation control method
WO2018177362A1 (en) * 2017-03-31 2018-10-04 比亚迪股份有限公司 Hybrid electric vehicle and power system thereof
WO2018177358A1 (en) * 2017-03-31 2018-10-04 比亚迪股份有限公司 Hybrid electric vehicle, power system thereof, and power generation control method therefor
CN108656930A (en) * 2017-03-31 2018-10-16 比亚迪股份有限公司 Hybrid vehicle and its dynamical system
WO2019062880A1 (en) * 2017-09-29 2019-04-04 比亚迪股份有限公司 Hybrid vehicle and power generation control method and device thereof
WO2019062883A1 (en) * 2017-09-29 2019-04-04 比亚迪股份有限公司 Hybrid vehicle and power generation control method and device thereof
CN110562241A (en) * 2018-05-17 2019-12-13 丰田自动车株式会社 Control device for hybrid vehicle

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018177356A1 (en) * 2017-03-31 2018-10-04 比亚迪股份有限公司 Hybrid electric vehicle and power system thereof, and power generation control method
WO2018177362A1 (en) * 2017-03-31 2018-10-04 比亚迪股份有限公司 Hybrid electric vehicle and power system thereof
WO2018177358A1 (en) * 2017-03-31 2018-10-04 比亚迪股份有限公司 Hybrid electric vehicle, power system thereof, and power generation control method therefor
CN108656930A (en) * 2017-03-31 2018-10-16 比亚迪股份有限公司 Hybrid vehicle and its dynamical system
CN108656930B (en) * 2017-03-31 2024-04-16 比亚迪股份有限公司 Hybrid electric vehicle and power system thereof
WO2019062880A1 (en) * 2017-09-29 2019-04-04 比亚迪股份有限公司 Hybrid vehicle and power generation control method and device thereof
WO2019062883A1 (en) * 2017-09-29 2019-04-04 比亚迪股份有限公司 Hybrid vehicle and power generation control method and device thereof
CN110562241A (en) * 2018-05-17 2019-12-13 丰田自动车株式会社 Control device for hybrid vehicle
CN110562241B (en) * 2018-05-17 2022-11-29 丰田自动车株式会社 Control device for hybrid vehicle

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