CN109572663A

CN109572663A - The control method of hybrid vehicle and its engine, device

Info

Publication number: CN109572663A
Application number: CN201710909317.0A
Authority: CN
Inventors: 王春生; 许伯良; 罗永官
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2017-09-29
Filing date: 2017-09-29
Publication date: 2019-04-05
Anticipated expiration: 2037-09-29
Also published as: CN109572663B

Abstract

The invention discloses the control methods of a kind of hybrid vehicle and its engine, device, hybrid vehicle includes engine, power motor, power battery, the auxiliary-motor being connected with engine, engine outputs power to the wheel of hybrid vehicle by clutch, power motor is used to output driving force to the wheel of hybrid vehicle, power battery is used to power to power motor, auxiliary-motor generates electricity under the drive of engine, if method includes: that auxiliary-motor breaks down, then judge whether hybrid vehicle meets and counter drags engine start control condition；If hybrid vehicle satisfaction is counter to drag engine start control condition, hybrid vehicle is controlled into counter and drags engine start mode, and control power motor and drag engine start by the way that clutch is counter.Thereby, it is possible to guarantee the normal use of hybrid vehicle fuel system, the safety and dynamic property of vehicle are helped to improve.

Description

The control method of hybrid vehicle and its engine, device

Technical field

The present invention relates to automotive field, in particular to a kind of control method of hybrid electric vehicle engine, a kind of mixing The control device of power vehicle engine and a kind of hybrid vehicle.

Background technique

In hybrid vehicle, BSG (Belt Driven Starter Generator, belt are driven starting/power generation) Motor has both two kinds of power-assisted, power generation functions, and in automobile normal running, BSG motor generates electricity as generator, short in automobile When suspending vehicle, engine has the function of idle stop, meanwhile, BSG motor is as auxiliary power source, in the torque demand of driver Power-assisted can be provided in the case where big, promote power performance.However, if BSG motor breaks down, and hybrid vehicle Without starter, then it can not start engine and be charged or driven, will affect hybrid vehicle as a result, to fuel system Normal use, cause hybrid vehicle continuous drain until electricity exhaust, and if hybrid vehicle high speed for a long time Traveling, then may result in hybrid vehicle " paralysis ".

Summary of the invention

The present invention is directed to solve one of the technical problem in above-mentioned technology at least to a certain extent.For this purpose, of the invention One purpose is to propose that a kind of control method of hybrid electric vehicle engine, this method can be in auxiliary-motor failures by dynamic Force motor controls engine start, guarantees the normal use of fuel system, and then improve the safety and dynamic property of vehicle.

Second object of the present invention is to propose a kind of non-transitorycomputer readable storage medium.

Third object of the present invention is to propose a kind of control device of hybrid electric vehicle engine.

Fourth object of the present invention is to propose a kind of hybrid vehicle.

In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of control of hybrid electric vehicle engine Method, the hybrid vehicle include engine, power motor, power battery, the auxiliary-motor being connected with the engine, institute The wheel that engine outputs power to the hybrid vehicle by clutch is stated, the power motor is used for output driving Power is to the wheel of the hybrid vehicle, and the power battery is for giving the power motor to power, the auxiliary-motor difference It is connected with the power motor and the power battery, the auxiliary-motor generates electricity under the drive of the engine, described Method judges whether the hybrid vehicle meets and counter drags hair the following steps are included: if the auxiliary-motor breaks down Motivation starts control condition；If the hybrid vehicle meet it is described it is counter drag engine start control condition, control institute State hybrid vehicle enter it is counter drag engine start mode, and control the power motor by the clutch it is counter drag described in Engine start.

The control method of hybrid electric vehicle engine according to an embodiment of the present invention breaks down in auxiliary-motor, and mixed It closes power vehicle and meets anti-when dragging engine start control condition, control hybrid vehicle entrance is counter to drag engine start mould Formula, and control power motor and drag engine start by the way that clutch is counter, thereby, it is possible to guarantee hybrid vehicle fuel system Normal use helps to improve the safety and dynamic property of vehicle.

Further, the invention proposes a kind of non-transitorycomputer readable storage medium, it is stored thereon with computer Program, the program realize the control method of above-mentioned hybrid electric vehicle engine when being executed by processor.

The non-transitorycomputer readable storage medium of the embodiment of the present invention, what is stored thereon by execution mixes with above-mentioned The corresponding program of control method of power vehicle engine is closed, hybrid vehicle can be controlled in auxiliary-motor failure and enter It is counter to drag engine start mode, and control power motor and drag engine start by the way that clutch is counter, and then can guarantee that mixing is dynamic The normal use of power automotive fuel oil system helps to improve the safety and dynamic property of vehicle.

In order to achieve the above objectives, third aspect present invention embodiment proposes a kind of control of hybrid electric vehicle engine Device, the hybrid vehicle include engine, power motor, power battery, the auxiliary-motor being connected with the engine, institute The wheel that engine outputs power to the hybrid vehicle by clutch is stated, the power motor is used for output driving Power is to the wheel of the hybrid vehicle, and the power battery is for giving the power motor to power, the auxiliary-motor difference It is connected with the power motor and the power battery, the auxiliary-motor generates electricity under the drive of the engine, described Device includes: first judgment module, for judging whether the hybrid vehicle meets when the auxiliary-motor breaks down It is counter to drag engine start control condition；Control module described counter drags engine start for meeting in the hybrid vehicle When control condition, the hybrid vehicle is controlled into counter and drags engine start mode, and controls the power motor and passes through The clutch is counter to drag the engine start.

The control device of hybrid electric vehicle engine according to an embodiment of the present invention breaks down in auxiliary-motor, and mixed It closes power vehicle and meets anti-when dragging engine start control condition, control that hybrid vehicle entrance is counter to drag hair by control module Motivation start-up mode, and control power motor and drag engine start by the way that clutch is counter, thereby, it is possible to guarantee hybrid vehicle The normal use of fuel system helps to improve the safety and dynamic property of vehicle.

Further, the invention proposes a kind of hybrid vehicles comprising above-mentioned hybrid electric vehicle engine Control device.

The hybrid vehicle of the embodiment of the present invention can using the control device of above-mentioned hybrid electric vehicle engine In auxiliary-motor failure, control power motor drags engine start by the way that clutch is counter, and then can guarantee hybrid vehicle The normal use of fuel system helps to improve the safety and dynamic property of vehicle.

Detailed description of the invention

Fig. 1 is the block diagram of hybrid vehicle according to an embodiment of the invention；

Fig. 2 a is the structural schematic diagram of hybrid vehicle according to an embodiment of the invention；

Fig. 2 b is the structural schematic diagram of hybrid vehicle in accordance with another embodiment of the present invention；

Fig. 3 is the block diagram of hybrid vehicle in accordance with another embodiment of the present invention；

Fig. 4 is the schematic diagram of the drive mechanism between engine according to an embodiment of the invention and corresponding wheel；

Fig. 5 is the schematic diagram of the drive mechanism between engine in accordance with another embodiment of the present invention and corresponding wheel；

Fig. 6 is the flow chart of the control method of hybrid electric vehicle engine according to an embodiment of the invention；

Fig. 7 is the flow chart of the control method of hybrid electric vehicle engine accord to a specific embodiment of that present invention；

Fig. 8 is the flow chart of the control method of another hybrid electric vehicle engine implemented according to the present invention；

Fig. 9 is according to an embodiment of the present invention to judge VCU and whether BSG electric machine controller communicates normal flow chart；

Figure 10 is according to an embodiment of the present invention to judge VCU and whether ECU communicates normal flow chart；

Figure 11 is according to an embodiment of the present invention to judge VCU and whether TCU communicates normal flow chart；

Figure 12 is the flow chart of BSG electrical fault self-test according to an embodiment of the present invention；

Figure 13 is the block diagram of the control device of hybrid electric vehicle engine according to an embodiment of the invention；

Figure 14 is the block diagram of the control device of hybrid electric vehicle engine in accordance with another embodiment of the present invention；

Figure 15 is the block diagram of the hybrid vehicle of another embodiment according to the present invention.

Specific embodiment

The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.

The hybrid vehicle of the embodiment of the present invention and its control method of engine, dress described with reference to the accompanying drawing It sets.

Fig. 1 is the block diagram of hybrid vehicle according to an embodiment of the invention.As shown in Figure 1, the hybrid power Automobile 2000 includes: engine 1, power motor 2, power battery 3 and auxiliary-motor 5.

A specific embodiment according to the present invention, hybrid vehicle can be PHEV (Plug-in Hybrid Electric Vehicle, plug-in hybrid-power automobile).

In conjunction with Fig. 1 to Fig. 3, engine 1 outputs power to the wheel 7 of hybrid vehicle by clutch 6；Power electric Machine 2 is used to output driving force to the wheel 7 of hybrid vehicle.That is, any of engine 1 and power motor 2 Can individually output power to wheel 7, alternatively, engine 1 and power motor 2 can also simultaneously output power to wheel 7.

Auxiliary-motor 5 is connected with engine 1, for example, auxiliary-motor 5 can be connected by the train end of engine 1 with engine 1, Auxiliary-motor 5 is also connected with power motor 2 and power battery 3 respectively, real when auxiliary-motor 5 is generated electricity under the drive of engine 1 It now charges to power battery 3 and/or powers to power motor 2, wherein power battery 3 can be used for powering to power motor 2.

Further, referring to Fig. 1, hybrid vehicle 2000 can also include DC-DC converter 4, auxiliary-motor 5 also with DC-DC converter 4 is connected, and when auxiliary-motor 5 is generated electricity under the drive of engine 1, can also realize to DC-DC converter 4 Power supply.

In some embodiments, auxiliary-motor 5 can be BSG (Belt-driven Starter Generator, belt transmission Starting/generating integrated motor) motor.It should be noted that auxiliary-motor 5 belongs to high-voltage motor, such as the power generation electricity of auxiliary-motor 5 Pressure is suitable with the voltage of power battery 3, so that the electric energy that auxiliary-motor 5 generates can be without voltage transformation directly to power battery 3 Charging can also power directly to power motor 2 and/or DC-DC converter 4.And auxiliary-motor 5 also belongs to high efficiency generator, example It drives the power generation of auxiliary-motor 5 that 97% or more generating efficiency can be realized such as under 1 idling speed of engine, improves normal power generation Efficiency.

In addition, in some embodiments of the invention, auxiliary-motor 5 can be used for reversed output torque to engine 1, to pass through Engine 1 provides opposite force to wheel, such as when such as a pair of of front-wheel 71 of 1 output torque of engine to the first wheel and the second wheel When such as a pair of rear wheels 72, auxiliary-motor 5 can drive the crank rotation of engine 1, with to 1 output torque of engine, to make to start Machine 1 provides opposite force to wheel.

In an embodiment of the present invention, a is mixed when engine 1 and power motor 2 drive same wheel jointly referring to fig. 2 Close power vehicle 2000 further include main reducing gear 8 and speed changer 90, wherein engine 1 by clutch 6, speed changer 90 and Main reducing gear 8 outputs power to for example a pair of of front-wheel 71 of the first wheel of hybrid vehicle, and power motor 2 passes through main deceleration Device 8 outputs driving force to for example a pair of of front-wheel 71 of the first wheel of hybrid vehicle.Wherein, clutch 6 and speed changer 90 can It is integrally disposed.

B referring to fig. 2, when engine 1 drives the first wheel and power motor 2 drives the second wheel, hybrid vehicle 2000 further include the first speed changer 91 and the second speed changer 92, wherein engine 1 passes through clutch 6 and the first speed changer 91 will For example a pair of of front-wheel 71 of first wheel of power output to hybrid vehicle, power motor 2 are exported by the second speed changer 92 Driving force to hybrid vehicle the second wheel such as a pair of rear wheels 72.Wherein, clutch 6 can be integrated with the first speed changer 91 Setting.

Further, in some embodiments of the invention, as shown in figure 3, auxiliary-motor 5 further includes the first controller 51, Power motor 2 further includes second controller 21, and auxiliary-motor 5 is connected respectively to power battery 3 and described by the first controller 51 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, power battery 3 and DC-DC converter 4 respectively, First controller 51 can have an AC-DC converter unit, and auxiliary-motor 5 can produce alternating current when generating electricity, and AC-DC converter unit can will be secondary The convert alternating current that the power generation of motor 5 generates is high voltage direct current such as 600V high voltage direct current, is filled with realizing to power battery 3 Electricity is powered to power motor 2, at least one of power supply of DC-DC converter 4.

Similarly, second controller 21 can have DC-AC converter unit, and auxiliary-motor 5 can be generated electricity and be produced by the first controller 51 Raw convert alternating current is high voltage direct current, the high voltage direct current that DC-AC converter unit can again convert out the first controller 51 It is transformed to alternating current, to power to power motor 2.

Further, as shown in figure 3, DC-DC converter 4 is also connected with power battery 3, DC-DC converter 4 is also by the Two controllers 21 are connected with power motor 2.

In some embodiments, referring to Fig. 3, the first controller 51 has the first DC terminal DC1, and second controller 21 has Second DC terminal DC2, DC-DC converter 4 have a third DC terminal DC3, and the third DC terminal DC3 of DC-DC converter 4 can be with the First DC terminal DC1 of one controller 51 is connected, to pass through the high voltage direct current of the first DC terminal DC1 output to the first controller 51 Electricity carries out DC-DC transformation.Also, the third DC terminal DC3 of DC-DC converter 4 can also be connected with power battery 3, the first control First DC terminal DC1 of device 51 can be connected with power battery 3, so that the first controller 51 is high by the first DC terminal DC1 output Straightening galvanic electricity is to power battery 3 to charge to power battery 3.Further, the third DC terminal DC3 of DC-DC converter 4 may be used also It is connected with the second DC terminal DC2 of second controller 21, the first DC terminal DC1 of the first controller 51 can be with second controller 21 The second DC terminal DC2 be connected so that the first controller 51 by the first DC terminal DC1 export high voltage direct current to second control Device 21 to power motor 2 to power.

Further, as shown in figure 3, DC-DC converter 4 also respectively with the first electrical equipment 10 in hybrid vehicle It is connected with low tension battery 20 to power to the first electrical equipment 10 and low tension battery 20, and low tension battery 20 is also with first Electrical equipment 10 is connected.

In some 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 and/or auxiliary-motor 5 that power battery 3 exports can be converted by the high voltage direct current that the first controller 51 exports For low-voltage DC, and the low-voltage DC is exported by the 4th DC terminal DC4.Further, the 4th of DC-DC converter 4 DC terminal DC4 can be connected with the first electrical equipment 10, to power to the first electrical equipment 10, wherein the first electrical 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 charge to low tension battery 20.

Also, low tension battery 20 is connected with the first electrical equipment 10, to power to the first electrical equipment 10, particularly, When auxiliary-motor 5 stops power generation and 3 failure of power battery or not enough power supply, low tension battery 20 can supply for the first electrical equipment 10 Electricity, to guarantee the low pressure electricity consumption of vehicle, it is ensured that vehicle can realize pure fuel oil mode traveling, help to meet user to vehicle Mileage travelled demand.

As described above, the third DC terminal DC3 of DC-DC converter 4 is connected with the first controller 51, DC-DC converter 4 4th DC terminal DC4 is connected with the first electrical equipment 10 and low tension battery 20 respectively, when power motor 2, second controller 21 When breaking down with power battery 3, auxiliary-motor 5 can generate electricity to pass through the first controller 51 and DC-DC converter 4 to first Electrical equipment 10 powers and/or charges to low tension battery 20, so that hybrid vehicle is travelled with pure fuel oil mode.

Auxiliary-motor 5 and DC-DC converter 4 have independent supplying channels all the way as a result, when power motor 2, second controller 21 When breaking down with power battery 3, electric drive cannot achieve, pass through the independent confession of auxiliary-motor 5 and DC-DC converter 4 at this time Electric channel, it is ensured that the low pressure electricity consumption of vehicle, it is ensured that vehicle can realize pure fuel oil mode traveling, help to meet user to whole The mileage travelled demand of vehicle.

Further combined with the embodiment of Fig. 3, the first controller 51, second controller 21 and power battery 3 also respectively with it is mixed The second electrical equipment 30 closed in power vehicle is connected.

In some embodiments, as shown in figure 3, the first DC terminal DC1 of the first controller 51 can be with the second electrical equipment 30 are connected, and when auxiliary-motor 5 is generated electricity, auxiliary-motor 5 can be powered by the first controller 51 directly to the second electrical equipment 30. Similarly, power battery 3 can also be connected with the second electrical equipment 30, to power to the second electrical equipment 30.

Wherein, the second electrical 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 described above, by auxiliary-motor 5 generate electricity, it can be achieved that be power battery 3 charging or be power motor 2 power or be First electrical equipment 10 and the power supply of the second electrical equipment 30.Also, power battery 3 can be power motor by second controller 21 2 power supplies, or power for the second electrical equipment 30, it can also be that the first electrical equipment 10 and/or low pressure are stored by DC-DC converter 4 Battery 20 is powered.Thus vehicle power supply mode is enriched, meets power demand of the vehicle under different operating conditions, improves vehicle Performance.

It should be noted that in embodiments of the present invention, low pressure can refer to the voltage of 12V (volt) or 24V, high pressure can refer to 600V Voltage, but not limited to this.

Below with reference to a specific embodiment of Fig. 4 detailed description hybrid vehicle, which is suitable for engine 1 Drive the dynamical system of same wheel, i.e. two driving mixed power automobiles jointly with power motor 2.It should be noted that the implementation Example mainly describes a kind of specific drive mechanism between engine 1, power motor 2 and wheel 7, speed changer 90 in especially Fig. 2 a Structure, the embodiment of rest part 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 axis 931 in following example and each Associated gear and shifting element etc. can be used to constitute the speed changer 90 in Fig. 2 a on axis.

In some embodiments, shown in as shown in Figure 1, Figure 3 and Figure 4, hybrid vehicle 2000 mainly includes engine 1, moves Force motor 2, power battery 3, DC-DC converter 4, auxiliary-motor 5, multiple input shafts are (for example, the first input shaft 911, second inputs Axis 912), phase on multiple output shafts (for example, first output shaft 921, the second output shaft 922) and motor power axis 931 and each axis Close gear and shifting element (e.g., synchronizer).

As shown in figure 4, engine 1 outputs power to hybrid vehicle by double clutch 2d (i.e. clutch 6) Wheel 7.When carrying out power transmitting between engine 1 and input shaft, engine 1 is arranged to alternative by double clutch 2d Ground engages at least one of multiple input shafts.

For example, in the example of fig. 4, multiple input shafts may 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 be selected by double clutch 2d Engage with one in the first input shaft 911 and the second input shaft 912 to transmit power to selecting property.Alternatively, particularly, engine 1 can also simultaneously engage with the first input shaft 911 and the second input shaft 912 to transmit power.However, it is to be understood that starting Machine 1 can also be disconnected with the first input shaft 911 and the second input shaft 912 simultaneously.

Multiple output shafts may 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 by shift gear pair between input shaft and output shaft.For example, being respectively provided on each input shaft There is gear driving gear, is provided with gear on each input shaft in the first input shaft 911 and the second input shaft 912 in other words actively Gear is provided with gear driven gear on each output shaft, every in the first output shaft 921 and the second output shaft 922 in other words Gear driven gear is provided on a output shaft, gear driven gear is accordingly engaged with gear driving gear, to constitute more The gear pair different to speed ratio.

In some embodiments of the invention, can have a gear using six gear transmissions between input shaft and output shaft Gear pair, second gear are secondary, three keep off gear pairs, four gear gear pairs, five gear gear pairs and six gear gear pairs.But the present invention is simultaneously It is without being limited thereto, for the ordinary skill in the art, can according to transmission need and adaptability increases or decreases gear The number of gear pair, however it is not limited to six gear transmission shown in the embodiment of the present invention.

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 axis 931 Shaft 922) in one link, linked by motor power axis 931 with one in output shaft, thus dynamic Power can be transmitted between one in motor power axis 931 and output shaft.For example, the power through the output shaft is (such as The power exported from engine 1) it may be output to motor power axis 931, or the power through motor power axis 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 components (for example, two) coupled movements, with two For component linkage, wherein when a component movement, another component also moves therewith.

For example, in some embodiments of the invention, gear and axis linkage can be understood as when gear rotates and it The axis of linkage also will rotation, or in axis rotation, the gear that links with it will also rotate.

For another example, axis and axis linkage can be understood as when wherein axis rotates, another axis linking with it also general Rotation.

For another example, gear and gear-linked can be understood as when wherein a gear rotates, link with it another Gear also will rotation.

Below the present invention in the description in relation to " linkage ", if be understood in this way without specified otherwise.

Similarly, power motor 2 is arranged to link with motor power axis 931, for example, power motor 2 can will generate Power output to motor power axis 931, to output driving force to the wheel of hybrid vehicle by motor power axis 931 7。

Need to illustrate that a little in the description of the present invention, motor power axis 931 can be the motor of power motor 2 itself Axis.It is, of course, understood that the motor shaft of motor power axis 931 and power motor 2 is also possible to two individual axis.

In some 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 rotation, in other words, output section 221 can independently be rotated from the output shaft with different revolving speeds.

Further, output section 221 is arranged to be selectively engageable one with same with the output shaft in output shaft Step rotation.In short, output section 221 is engageable to rotate synchronously with respect to the one of output shaft, can also disconnect with difference certainly Speed rotation.

As shown in figure 4, the output section 221 empty can be set on one in output shaft, but not limited to this.Such as In the example of Fig. 4, for 221 empty set of output section on the second output shaft 922, i.e. output section 221 and the second output shaft 922 can be with Different revolving speed differential rotations.

As described above, output section 221 can be rotated synchronously with one in output shaft, for example, can be corresponding by adding Synchronizer is achieved as desired by the synchronous effect of output section 221 Yu 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 some embodiments, power motor 2 is used to output driving force to the wheel 7 of hybrid vehicle, 1 He of engine Power motor 2 drives the same wheel of hybrid vehicle jointly.In conjunction with the example of Fig. 4, the differential mechanism 75 of vehicle can be arranged Between a pair of of front-wheel 71 or between a pair of rear wheels 72, in some examples of the invention, before a pair that power motor 2 drives When taking turns 71, differential mechanism 75 can be located between a pair of of front-wheel 71.

The function of differential mechanism 75 be when vehicle turning travel or on uneven road surface when driving, make driving wheels with not Same angular speed rolls, to guarantee to make PURE ROLLING between two side drive wheels and ground.Main reducing gear 8 is provided on differential mechanism 75 Main reducing gear driven gear 74, such as main reducing gear driven gear 74 can be arranged on the shell of differential mechanism 75.Main deceleration Device driven gear 74 can be bevel gear, but not limited to this.

Below in conjunction with another specific embodiment of Fig. 5 detailed description hybrid vehicle, the embodiment is equally applicable The dynamical system of same wheel, i.e. two driving mixed power automobiles are driven jointly in engine 1 and power motor 2.It needs to illustrate It is that the embodiment mainly describes a kind of specific drive mechanism between engine 1, power motor 2 and wheel 7, especially Fig. 2 a The structure of middle speed changer 90, the embodiment of rest part and Fig. 1, Fig. 3 and Fig. 4 is essentially identical, is no longer described in detail here.

As shown in figure 5, reverse output gear 81 is one, which can be with empty set in the second output On axis 922.But the present invention is not limited thereto, and in further embodiments, reverse output gear 81 is also possible to two, and this two Reverse output gear 81 simultaneously empty set on the second output shaft 922.It is, of course, understood that reverse output gear 81 can also To be three or three or more.

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 link at 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 that the power that reverses gear can be exported from reverse output gear 81.Of the invention In example, reverse output gear 81 is empty set on the second output shaft 922, and reverse gear shaft 89 is and the first input shaft 911 linkages, such as the power that reverses gear that engine 1 exports can be defeated to reversing gear by exporting after the first input shaft 911, reverse gear shaft 89 Gear 81 out.

Motor power axis 931 is described in detail below.931 overhead of motor power axis set is provided with motor power axis the One gear 31, motor power axis second gear 32.Motor power axis first gear 31 can be engaged with main reducing gear driven gear 74 Transmission, to transmit the wheel 7 of driving force to hybrid vehicle.

Motor power axis second gear 32 is arranged to link with one of gear driven gear, is implementing according to the present invention The hybrid vehicle of example is when be in certain operating conditions, the power that power source exports can in motor power axis second gear 32 and It is transmitted between the gear driven gear to link with it, motor power axis second gear 32 and the gear driven gear join at this time It is dynamic.For example, motor power axis second gear 32 and second gear driven gear 2b link, motor power axis second gear 32 and second gear from Moving gear 2b can be engaged directly or by intermediate transmission component indirect drive.

Further, motor power axis synchronizer 33c, motor power axis synchronizer 33c are additionally provided on motor power axis 931 Between motor power axis first gear 31 and motor power axis second gear 32, motor power axis synchronizer 33c can be selected Selecting property motor power axis first gear 31 or motor power axis second gear 32 are engaged with motor power axis 3.Such as in Fig. 5 Example in, the clutch collar of motor power axis synchronizer 33c is moved to the left engageable motor power axis second gear 32, moves right Dynamic then engageable motor power axis first gear 31.

For motor power axis first gear 31, since it is engaged with main reducing gear driven gear 74, power Motor 2 can engage motor power axis first gear 31 for the power of generation directly from electricity by motor power axis synchronizer 33c Mechanomotive force axis first gear 31 exports, and can shorten transmission chain in this way, reduces intermediate transmission component, improves transmission efficiency.

Secondly motor power axis 931 and the kind of drive of power motor 2 are described in detail in conjunction with specific embodiments.

In some embodiments, as shown in figure 5, being further fixedly arranged on motor power axis third tooth on motor power axis 931 Wheel 33, power motor 2 are arranged to and motor power axis third gear 33 directly engaged transmission or indirect drive.

Further, first motor gear 511 is provided on the motor shaft of power motor 2, during first motor gear 511 passes through Between gear 512 and motor power axis third gear 33 be driven.For another example, power motor 2 can also coaxial phase with motor power axis 931 Even.

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 is rotated synchronously with the first output shaft 921, and the first output shaft output gear 211 is engaged with main reducing gear driven gear 74 Transmission, so that 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 is rotated synchronously with the second output shaft 922, and the second output shaft output gear 212 is engaged with main reducing gear driven gear 74 Transmission, so that 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 axis first gear 31 can be used for exporting the power through motor power axis 931, therefore motor Power axis first gear 31 equally with the engaged transmission of main reducing gear driven gear 74.

The hybrid vehicle of the embodiment of the present invention as a result, can make engine be not involved in driving in low speed, and then not Using clutch, clutch abrasion or sliding wear are reduced, while reducing pause and transition in rhythm or melody sense, improves comfort.Moreover, auxiliary-motor can Directly it is power battery charging, while can also is the power supply such as low-voltage device such as low tension battery, the first electrical equipment, can also makees Starter is used.

Based on above-mentioned hybrid vehicle, the invention proposes a kind of control method of hybrid electric vehicle engine and dresses It sets.

Fig. 6 is the flow chart of the control method of hybrid electric vehicle engine according to an embodiment of the invention.Such as Fig. 6 It is shown, the control method the following steps are included:

S101 judges whether hybrid vehicle meets and counter drags engine start control if auxiliary-motor breaks down Condition.

S102, if hybrid vehicle meet it is counter drag engine start control condition, control hybrid vehicle into Enter it is counter drag engine start mode, and control power motor and drag engine start by the way that clutch is counter.

Specifically, in some embodiments of the invention, when the current shift of hybrid vehicle is D gear or P gear, mixing Take offence automobile current vehicle speed be less than or equal to the first preset vehicle speed, the SOC value of power battery less than the first preset value, auxiliary-motor send out When electrokinetic cell system, engine fuel oil system, the transmission system of raw failure and hybrid vehicle work normally, such as Fruit power battery and power motor allow the maximum power Pmax exported and the required power P x of starting engine meet Pmax >= Px*a then controls hybrid vehicle into counter and drags engine start mode.

Wherein, D gear is driving gear, and P gear is Park；The value of first preset vehicle speed is 0.4~0.6km/h, such as It can be 0.5km/h；The value of first preset value is 17%~19%, such as can be 18%；The value of the second default gradient is 19.5%~20.5%, it such as can be 20%；A is greater than 100%, such as can be 110%.

It is appreciated that in this embodiment, auxiliary-motor breaks down can not issue as auxiliary-motor in the drive of engine Electricity, and cannot achieve the function of starting engine.If auxiliary-motor breaks down, and hybrid vehicle is without other startings Machine, then the fuel system of hybrid vehicle can not normal use can not also generate electricity, there are the risks that electricity exhausts, at this point, such as If fruit hybrid vehicle is run at high speed for a long time, hybrid vehicle " paralysis " may result in.

Optionally, it if Px≤Pmax < Px*a, controls hybrid vehicle and keeps current control state.

Further, in some embodiments of the invention, hybrid vehicle, which is run on, counter drags engine start mode When, if hybrid vehicle meets following either condition, controls hybrid vehicle and exits and counter drag engine start mode:

(1) current shift of hybrid vehicle is that N is kept off or R is kept off；

(2) current vehicle speed of hybrid vehicle is greater than the first preset vehicle speed；

(3) SOC value of power battery is more than or equal to the second preset value；

(4) auxiliary-motor works normally；

(5) at least one of the electrokinetic cell system of hybrid vehicle, engine fuel oil system and transmission system It breaks down；

(6) Pmax < Px.

Wherein, N gear is neutral gear, and R gear is to reverse gear；Second preset value is greater than the first preset value, and the second preset value takes Value is 19.5%~21%, such as can be 20%.

It should be noted that current shift, current vehicle speed, the SOC value of power battery, the operating status of auxiliary-motor and Working condition when being monitored judgement of the electrokinetic cell system of hybrid vehicle, engine fuel oil system, transmission system, Above-mentioned each parameter can be characterized by the OK that is arranged on the instrument board of hybrid vehicle gear whether be all satisfied anti-engine is dragged to open Dynamic control condition, in other words, above-mentioned each parameter be all satisfied it is counter drag engine start control condition when, can trigger OK and keep off.It can manage Solution, if above-mentioned each parameter be all satisfied it is counter drag engine start control condition, but OK gear is not triggered, alternatively, if it is above-mentioned respectively At least one in parameter be unsatisfactory for it is counter drag engine start control condition, but OK gear is not allowed then to mix dynamic by false triggering Power automobile enter it is counter drag engine start mode or control hybrid vehicle and exit counter drag engine start mode.

For example, as shown in fig. 7, to whether control hybrid vehicle enter it is counter drag engine start mode progress When judgement, first, it is determined that whether the SOC of power battery is more than or equal to 20%, if it is, not allowing hybrid vehicle to enter It is counter to drag engine start mode；If it is not, then judging whether the SOC of power battery is more than or equal to 18%.If SOC >=18%, It then controls hybrid vehicle and keeps current control state；If SOC < 18% judges BSG motor and hybrid vehicle Electrokinetic cell system, engine fuel oil system and transmission system whether work normally, if having generation in four therefore Barrier does not allow then hybrid vehicle to drag engine start mode into counter；If four work normally, judge that mixing is dynamic Whether the current shift of power automobile is in D gear or P gear, and whether current vehicle speed is less than or equal to 0.5km/h.If hybrid power vapour The current shift of vehicle is not at D gear or P gear and current vehicle speed is greater than 0.5km/h, then hybrid vehicle is not allowed to enter steady slope Mode；If the current shift of hybrid vehicle is in D gear or P gear and current vehicle speed is less than equal to 0.5km/h, judge Whether OK gear is triggered, if it is not, then hybrid vehicle is not allowed to drag engine start mode into counter, if it is, into One step judges whether Pmax is more than or equal to Px*a.If Pmax >=Px*a, controllable hybrid vehicle starts into counter drag Machine start-up mode, and control power motor and drag engine start by the way that clutch is counter.If Px≤Pmax < Px*a, control is mixed It closes power vehicle and keeps current control state；If Pmax < Px, hybrid vehicle is not allowed to drag engine to open into counter Dynamic model formula.

It is appreciated that if hybrid vehicle entered it is counter drag engine start mode, in example shown in Fig. 7 not Allow hybrid vehicle enter it is counter drag engine start mode can be replaced exit it is counter drag engine start mode, allow access into It is counter that engine start mode is dragged to can be replaced holding current control state.

It should be noted that when hybrid vehicle be currently running in it is counter drag engine start mode when, if got The SOC of power battery is 19% or Pmax=Px, then controls hybrid vehicle and keep current control state, i.e. hybrid power vapour Vehicle, which is still run on, counter drags engine start mode.

This method can accurately judge the operating status of hybrid vehicle as a result, and in hybrid vehicle Meet anti-when dragging engine start control condition, control power motor passes through that clutch is counter to drag engine start, and then can protect The normal use for demonstrate,proving hybrid vehicle fuel system, helps to improve the safety and dynamic property of vehicle.

Further, referring to Fig. 8, control hybrid vehicle enter it is counter drag engine start mode after, it is also further Judge that power motor drags whether engine start succeeds by the way that clutch is counter.If power motor drags engine by the way that clutch is counter Start successfully, then judges that engine completes starting；If power motor drags engine start to fail by the way that clutch is counter, into one Whether the anti-number for dragging engine start failure of step judgement is less than preset times.If the anti-number for dragging engine start failure is small In preset times, then controls hybrid vehicle and keep current control state；If the anti-number for dragging engine start failure is big In being equal to preset times, then controls hybrid vehicle and exit and counter drag engine start mode.

Wherein, preset times can be demarcated as needed, and value can be any of 2~5, such as 2 times.

In this embodiment, when control power motor drags engine start by the way that clutch is counter, engine does not stop working, and It is powered with the fuel system of hybrid vehicle to baby battery, to guarantee the electricity of power battery.Wherein, baby battery is as given mixed Close the battery of the voltage smaller (such as 4-15V) of low-voltage equipment (such as vehicle mounted guidance) power supply on power vehicle.

It in this embodiment, can be by the VCU (Vehicle Control Unit, the vehicle that are arranged in hybrid vehicle Control unit) realize the control function of hybrid electric vehicle engine.

Wherein, VCU can (Electric Controller Unit, electronic control be single with BSG electric machine controller, ECU respectively Member), TCU (Transmission Control Unit, automatic gear-box control unit) communicated, with obtain respectively BSG electricity The working condition of machine control system, engine fuel oil system and TCU transmission system.Wherein, VCU and BSG electric machine controller, Can be communicated by CAN (Controller Area Network, lan controller) between ECU, TCU, and VCU with BSG electric machine controller, ECU, TCU need whether real-time judge VCU and BSG electric machine controller, ECU, TCU lead to when being communicated News are normal.If being appreciated that VCU and BSG electric machine controller, ECU, TCU communication abnormality, do not control hybrid vehicle into Enter anti-engine start mode or control hybrid vehicle to be dragged to exit and counter drag engine start mode.

It specifically, may include BSG electricity in the message as shown in figure 9, VCU is it is first determined whether receive BSG motor message The running state information of machine judges that VCU and the communication of BSG electric machine controller are normal, simultaneously if receiving BSG motor message It controls timer to reset, wherein the timer is for recording the duration for not receiving BSG motor message.If do not received It to BSG motor message, then adds up, and further judges tired when receiving BSG motor message again when controlling timer The product time.If accumulated time less than the first preset time Cs, can determine whether that VCU and the communication of BSG electric machine controller are normal；If Accumulated time is more than or equal to the first preset time Cs, then can determine whether VCU and BSG electric machine controller communication abnormality, at this point, can also recognize For BSG motor, there are failures.

As shown in Figure 10, VCU may include engine fuel oil system in the message it is first determined whether receive ECU message Work state information judge that VCU and ECU communication is normal, while controlling timer clearing if receiving ECU message, In, the timer is for recording the duration for not receiving ECU message.If not receiving ECU message, timer is controlled Timing is cumulative, and further judges the accumulated time when receiving ECU message again.If accumulated time is default less than second Time Cr then can determine whether that VCU and ECU communication is normal；If accumulated time is more than or equal to the second preset time Cr, can determine whether VCU and ECU communication abnormality, at this point, it is also contemplated that engine fuel oil system operation irregularity.

As shown in figure 11, VCU may include TCU transmission system in the message it is first determined whether receive TCU message Work state information judges that VCU and TCU communication is normal, while controlling timer clearing if receiving TCU message, In, the timer is for recording the duration for not receiving TCU message.If not receiving TCU message, timer is controlled Timing is cumulative, and further judges the accumulated time when receiving TCU message again.If accumulated time is default less than third Time Ct then can determine whether that VCU and TCU communication is normal；If accumulated time is more than or equal to third preset time Ct, can determine whether VCU and TCU communication abnormality, at this point, it is also contemplated that TCU transmission system operation irregularity.

Wherein, the first preset time Cs, the second preset time Cr and third preset time Ct can be marked as needed Fixed, the value of three may be the same or different.

It is appreciated that VCU can also be with BMS (Battery Management System, the cell tube of hybrid vehicle Reason system) communication, to obtain the working condition of electrokinetic cell system.Wherein, communication judges reference can be made to above-mentioned between VCU and BMS Communication judgement between VCU and BSG electric machine controller, ECU and TCU, is not repeated herein.

In this embodiment, BSG motor can carry out self-test.Specifically, Figure 12 is participated in, when BSG motor carries out self-test, BSG motor is first determined whether with the presence or absence of failure, if it is, judging BSG motor self test failure；If it is not, then further judgement BSG electric machine controller whether there is failure.If there are failures for BSG electric machine controller, BSG motor self test failure is judged；Such as Fruit is no, then judges that BSG motor self-test is normal.

To sum up, the control method of hybrid electric vehicle engine according to an embodiment of the present invention breaks down in auxiliary-motor, And hybrid vehicle meets anti-when dragging engine start control condition, control hybrid vehicle entrance is counter to drag engine start Mode, and control power motor and drag engine start by the way that clutch is counter, thereby, it is possible to guarantee hybrid vehicle fuel system Normal use, help to improve the safety and dynamic property of vehicle.

Figure 13 is the block diagram of the control device of hybrid electric vehicle engine according to an embodiment of the invention.Such as figure Shown in 13, the control device 200 of the hybrid electric vehicle engine includes: first judgment module 210 and control module 220.

Wherein, first judgment module 210 is used for when auxiliary-motor breaks down, and judges whether hybrid vehicle meets instead Drag engine start control condition.Control module 220, which is used to meet in hybrid vehicle, counter drags engine start control condition When, control hybrid vehicle drags engine start mode into counter, and controls power motor and drag engine by the way that clutch is counter Starting.

In some embodiments of the invention, when the current shift of hybrid vehicle is D gear or P gear, mixes vapour of taking offence The current vehicle speed of vehicle is less than or equal to the first preset vehicle speed, the SOC value of power battery and event occurs less than the first preset value, auxiliary-motor When electrokinetic cell system, engine fuel oil system, the transmission system of barrier and hybrid vehicle work normally, if dynamic Power P x needed for power battery and power motor allow the maximum power Pmax exported and starting engine meets Pmax >=Px*a, Control module 220 then controls hybrid vehicle and drags engine start mode into counter, wherein a is greater than 100%.

Optionally, control module 220 is also used in Px≤Pmax < Px*a, is controlled the hybrid vehicle holding and is worked as Preceding state of a control.

Further, referring to Figure 14, the control device 200 of hybrid electric vehicle engine can also judge mould including second Block 230 and third judgment module 240.

Wherein, third judgment module 50 is for judging that power motor drags whether engine start succeeds by the way that clutch is counter； 4th judgment module 60 is used for when power motor drags engine start to fail by the way that clutch is counter, and judgement is counter to drag engine start Whether the number of failure is less than preset times.

In this embodiment, control module 220 is also used to drag engine start success by the way that clutch is counter in power motor When, judge that engine completes starting, and when the anti-number for dragging engine start failure is less than preset times, control mixing is dynamic Power automobile keeps current control state, and when the anti-number for dragging engine start failure is more than or equal to preset times, control is mixed It closes power vehicle and exits and counter drag engine start mode.

In some embodiments of the invention, hybrid vehicle is run on anti-when dragging engine start mode, if mixed It closes power vehicle and meets following either condition, control module 220, which then controls hybrid vehicle and exits, counter drags engine start mould Formula:

(1) current shift of hybrid vehicle is that N is kept off or R is kept off；

(4) auxiliary-motor works normally；

(6) Pmax < Px.

Wherein, the second preset value is greater than the first preset value.

It should be noted that the specific embodiment of the control device of the hybrid electric vehicle engine of the embodiment of the present invention It can be found in the specific embodiment of the control method of the hybrid electric vehicle engine of the above-mentioned implementation of the present invention, to reduce redundancy, It is not repeated herein.

Figure 15 is the block diagram of hybrid vehicle according to an embodiment of the present invention.As shown in figure 15, the hybrid power vapour Vehicle 2000 includes the control device 200 of above-mentioned hybrid electric vehicle engine.

In addition, other of hybrid vehicle according to an embodiment of the present invention are constituted and its are acted on to those skilled in the art Member for be it is known, for reduce redundancy, be not repeated herein.

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 spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples It closes and combines.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three It is a etc., unless otherwise specifically defined.

Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes It is one or more for realizing custom logic function or process the step of executable instruction code module, segment or portion Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the invention Embodiment person of ordinary skill in the field understood.

Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment It sets.The more specific example (non-exhaustive list) of computer-readable medium include the following: there is the electricity of one or more wirings Interconnecting piece (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory (ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media His suitable method is handled electronically to obtain described program, is then stored in computer storage.

It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage Or firmware is realized.Such as, if realized with hardware in another embodiment, following skill well known in the art can be used Any one of art or their combination are realized: have for data-signal is realized the logic gates of logic function from Logic circuit is dissipated, the specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene can compile Journey gate array (FPGA) etc..

Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.

It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer In read/write memory medium.

Storage medium mentioned above can be read-only memory, disk or CD etc..Although having been shown and retouching above The embodiment of the present invention is stated, it is to be understood that above-described embodiment is exemplary, and should not be understood as to limit of the invention System, those skilled in the art can be changed above-described embodiment, modify, replace and become within the scope of the invention Type.

In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc. Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings Condition understands the concrete meaning of above-mentioned term in the present invention.

In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below " One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.

Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned Embodiment is changed, modifies, replacement and variant.

Claims

1. a kind of control method of hybrid electric vehicle engine, which is characterized in that the hybrid vehicle include engine, Power motor, power battery, the auxiliary-motor being connected with the engine, the engine output power to institute by clutch The wheel of hybrid vehicle is stated, the power motor is used to output driving force to the wheel of the hybrid vehicle, described Power battery for give the power motor power supply, the auxiliary-motor respectively with the power motor and the power battery phase Even, the auxiliary-motor generates electricity under the drive of the engine, the described method comprises the following steps:

If the auxiliary-motor breaks down, judges whether the hybrid vehicle meets and counter drag engine start control strip Part；

If the hybrid vehicle meet it is described it is counter drag engine start control condition, control the hybrid vehicle Engine start mode is dragged into counter, and controls the power motor and drags the engine start by the way that the clutch is counter.

2. the control method of hybrid electric vehicle engine as described in claim 1, which is characterized in that when the hybrid power The current shift of automobile is that D is kept off or P is kept off, the current vehicle speed for mixing automobile of taking offence is less than or equal to the first preset vehicle speed, described The SOC value of power battery breaks down less than the first preset value, the auxiliary-motor and the power battery of the hybrid vehicle When system, engine fuel oil system, transmission system work normally, if the power battery and the power motor allow Power P x needed for the maximum power Pmax and the starting engine of output meets Pmax >=Px*a, then it is dynamic to control the mixing Power automobile, which enters, described counter drags engine start mode, wherein a is greater than 100%.

3. the control method of hybrid electric vehicle engine as claimed in claim 2, which is characterized in that if Px≤Pmax < Px*a then controls the hybrid vehicle and keeps current control state.

4. the control method of hybrid electric vehicle engine as described in claim 1, which is characterized in that further include:

Judge that the power motor drags whether the engine start succeeds by the way that the clutch is counter；

If the power motor drags the engine start success by the way that the clutch is counter, judge that the engine is completed Starting；

If the power motor drags the engine start to fail by the way that the clutch is counter, further judge described in counter drag Whether the number of engine start failure is less than preset times；

If the anti-number for dragging the engine start failure is less than the preset times, controls the hybrid vehicle and protect Hold current control state；

If the anti-number for dragging the engine start failure is more than or equal to the preset times, the hybrid power vapour is controlled Vehicle, which exits, described counter drags engine start mode.

5. the control method of hybrid electric vehicle engine as claimed in claim 2, which is characterized in that when the hybrid power When automobile meets following either condition, controls the hybrid vehicle and exits and described counter drag engine start mode:

(1) current shift of the hybrid vehicle is that N is kept off or R is kept off；

(2) current vehicle speed of the hybrid vehicle is greater than first preset vehicle speed；

(3) SOC value of the power battery is more than or equal to the second preset value；

(4) auxiliary-motor works normally；

(5) at least one of the electrokinetic cell system of the hybrid vehicle, engine fuel oil system and transmission system It breaks down；

(6) Pmax < Px；

Wherein, second preset value is greater than first preset value.

6. a kind of non-transitorycomputer readable storage medium, is stored thereon with computer program, which is characterized in that the program quilt Processor realizes the control method of hybrid electric vehicle engine according to any one of claims 1 to 5 when executing.

7. a kind of control device of hybrid electric vehicle engine, which is characterized in that the hybrid vehicle include engine, Power motor, power battery, the auxiliary-motor being connected with the engine, the engine output power to institute by clutch The wheel of hybrid vehicle is stated, the power motor is used to output driving force to the wheel of the hybrid vehicle, described Power battery for give the power motor power supply, the auxiliary-motor respectively with the power motor and the power battery phase Even, the auxiliary-motor generates electricity under the drive of the engine, and described device includes:

First judgment module, for judging whether the hybrid vehicle meets counter drag when the auxiliary-motor breaks down Engine start control condition；

Control module, for the hybrid vehicle meet it is described it is counter drag engine start control condition when, described in control Hybrid vehicle drags engine start mode into counter, and controls the power motor and drag the hair by the way that the clutch is counter Motivation starting.

8. the control device of hybrid electric vehicle engine as claimed in claim 7, which is characterized in that when the hybrid power The current shift of automobile is that D is kept off or P is kept off, the current vehicle speed for mixing automobile of taking offence is less than or equal to the first preset vehicle speed, described The SOC value of power battery breaks down less than the first preset value, the auxiliary-motor and the power battery of the hybrid vehicle When system, engine fuel oil system, transmission system work normally, if the power battery and the power motor allow Power P x needed for the maximum power Pmax and the starting engine of output meets Pmax >=Px*a, and the control module is then controlled It makes the hybrid vehicle and enters and described counter drag engine start mode, wherein a is greater than 100%.

9. the control device of hybrid electric vehicle engine as claimed in claim 8, which is characterized in that the control module, It is also used to:

In Px≤Pmax < Px*a, controls the hybrid vehicle and keep current control state.

10. the control device of hybrid electric vehicle engine as claimed in claim 7, which is characterized in that further include:

Second judgment module, for judge the power motor by the clutch it is counter drag the engine start whether at Function；

Third judgment module, for sentencing when the power motor drags the engine start to fail by the way that the clutch is counter Whether the disconnected anti-number for dragging the engine start failure is less than preset times；

Wherein, the control module is also used to drag the engine start success by the way that the clutch is counter in the power motor When, judge that the engine completes starting, and be less than the preset times in the anti-number for dragging the engine start failure When, it controls the hybrid vehicle and keeps current control state, and be greater than in the anti-number for dragging the engine start failure When equal to the preset times, controls the hybrid vehicle and exit and described counter drag engine start mode.

11. the control device of hybrid electric vehicle engine as claimed in claim 8, which is characterized in that when the mixing is dynamic When power automobile meets following either condition, the control module, which controls the hybrid vehicle and exits, described counter drags engine to open Dynamic model formula:

(4) auxiliary-motor works normally；

(6) Pmax < Px；

Wherein, second preset value is greater than first preset value.

12. a kind of hybrid vehicle, which is characterized in that including described in any item hybrid power vapour as claim in claims 7-11 The control device of car engine.