CN103465765B - The Control method for power transmission of hybrid vehicle - Google Patents
The Control method for power transmission of hybrid vehicle Download PDFInfo
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- CN103465765B CN103465765B CN201310437224.4A CN201310437224A CN103465765B CN 103465765 B CN103465765 B CN 103465765B CN 201310437224 A CN201310437224 A CN 201310437224A CN 103465765 B CN103465765 B CN 103465765B
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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
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
Abstract
The invention discloses a kind of Control method for power transmission of hybrid vehicle.The present invention utilizes three difies to achieve a driving engine and two motors are coupled with the rotating speed of wheel, and, by controlling driving engine and motor cooperating operation in each driving mode, the advantage of motor can be utilized to make up the deficiency of driving engine, and the tractive performance of hybrid vehicle under various operating mode and energy regenerating can be taken into account further.
Description
Technical field
The present invention relates to the power technology of automobile, particularly a kind of Control method for power transmission of hybrid vehicle.
Background technology
In the power drive devices such as such as hybrid vehicle, generally include motor (being hereinafter motor) these two kinds of power parts of piston type internal combustion engine (being hereinafter driving engine) and four quadrant running, now, the demand of the coupling power of driving engine and motor will be there is.
And, driving engine a few operation point often only in its full-throttle characteristics can produce high efficiency, motor then has broad efficient district, therefore, how to utilize the advantage of motor just to become problem to be solved in prior art to the deficiency making up driving engine, and need to take into account how to improve the tractive performance of hybrid vehicle under various operating mode and energy regenerating simultaneously.
Summary of the invention
In view of this, the invention provides a kind of Control method for power transmission of hybrid vehicle.
The Control method for power transmission of a kind of hybrid vehicle provided by the invention, this Control method for power transmission is applied to the Power train of hybrid vehicle, and this Power train comprises the first diff, the second diff, the 3rd diff, the first motor and the second motor and driving engine; Wherein, two counter drive shafts of the first diff connect wheel, the main driving axle of the first diff connects the main driving axle of the second diff, the main driving axle that a counter drive shaft connects the first motor, another counter drive shaft connects the 3rd diff of the second diff, a counter drive shaft of the 3rd diff connects the second motor, another counter drive shaft connecting engine; This Control method for power transmission comprises:
When triggering pure engine mode, control driving engine run and be coupled by the 3rd diff and the second diff, and control the first motor and the second motor is out of service and being coupled of disconnection the first motor and the second diff, disconnect being coupled of the second motor and the 3rd diff;
When triggering electric-only mode, controlling engine stop and running, and control the first motor and run and to be coupled with the second diff and/or the second motor is run and is coupled by the 3rd diff and the second diff;
When triggering combination drive pattern, control driving engine run and be coupled by the 3rd diff and the second diff, and control the first motor operation and to be coupled with the second diff and/or the second motor is run and is coupled by the 3rd diff and the second diff;
When trigger increase journey pattern time, control driving engine run and be coupled with the second motor entering Generator Status by the 3rd diff, the 3rd diff disconnect with the second diff be coupled, the first motor and the second diff be coupled.
Alternatively, in above-mentioned Control method for power transmission, electric-only mode comprises weak electric model and strong electric model, wherein:
When triggering weak electric model, control engine stop operation, the first motor runs, the second motor is out of service, and control the second motor disconnect with the 3rd diff be coupled, the 3rd diff disconnect with the second diff be coupled, the first motor and the second diff be coupled, or, control that engine stop runs, the first motor is out of service, the second motor runs, and control that the second motor is coupled with the 3rd diff, the 3rd diff is coupled with the second diff, the first motor disconnects with the second diff and being coupled;
When triggering strong electric model, control that engine stop runs, the first motor and the second motor run, and control the second motor and the 3rd diff is coupled, the 3rd diff and the second diff is coupled, the first motor and the second diff are coupled.
Alternatively, in above-mentioned Control method for power transmission, mixed mode comprises Weak mixing pattern and strong mixed mode, wherein:
When triggering Weak mixing pattern, control driving engine operation, the first motor runs, the second motor is out of service, and control the second motor disconnect with the 3rd diff be coupled, the 3rd diff and the second diff is coupled, the first motor and the second diff are coupled, or, control that driving engine runs, the first motor is out of service, the second motor runs, and control that the second motor is coupled with the 3rd diff, the 3rd diff is coupled with the second diff, the first motor disconnects with the second diff and being coupled;
When triggering strong mixed mode, control that driving engine runs, the first motor and the second motor run, and control the second motor and the 3rd diff is coupled, the 3rd diff and the second diff is coupled, the first motor and the second diff are coupled.
Alternatively, in above-mentioned Control method for power transmission, comprise further: when trigger energy take-back model, control engine stop operation and at least control the first motor to enter Generator Status.
Alternatively, in above-mentioned Control method for power transmission, energy recuperation mode comprises strong take-back model and weak take-back model, wherein:
When triggering weak take-back model, control that engine stop runs, the first motor operates in Generator Status, the second motor is out of service, and control the 3rd diff and disconnect the first motor of the Generator Status that is coupled, operates in the second diff and the second diff is coupled;
When triggering strong take-back model, control that engine stop runs, the first motor and the second motor operate in Generator Status, and controlling run is coupled at the second motor of Generator Status and the 3rd diff is coupled, the 3rd diff and the second diff are coupled, operate in Generator Status the first motor and the second diff.
Alternatively, in above-mentioned Control method for power transmission, comprise further:
When triggering engine starting pattern, controlling engine starting, the second motor runs, and controlling that the second motor is coupled with the 3rd diff, the 3rd diff disconnects with the second diff and being coupled;
When triggering park mode, control that engine stop runs, the first motor and the second motor out of service, and control that the second motor is coupled with the 3rd diff, the 3rd diff disconnect with the second diff be coupled, the first motor disconnects with the second diff and being coupled.
Alternatively, in above-mentioned Control method for power transmission, comprising further: when triggering pure power generation mode, controlling engine starting, the second motor and operating in Generator Status, and control that the second motor is coupled with the 3rd diff, the 3rd diff disconnects with the second diff and being coupled.
Alternatively, in above-mentioned Control method for power transmission, comprise further: when triggering driving engine linkage pattern, control driving engine run, the first motor and the second motor out of service, and control the second motor disconnect with the 3rd diff be coupled, the 3rd diff is coupled with the second diff, the first motor disconnects with the second diff and being coupled.
Alternatively, in above-mentioned Control method for power transmission:
Electric-only mode comprises weak electric model and strong electric model, wherein:
When triggering weak electric model, control engine stop operation, the first motor runs, the second motor is out of service, and control the second motor disconnect with the 3rd diff be coupled, the 3rd diff disconnect with the second diff be coupled, the first motor and the second diff be coupled, or, control that engine stop runs, the first motor is out of service, the second motor runs, and control that the second motor is coupled with the 3rd diff, the 3rd diff is coupled with the second diff, the first motor disconnects with the second diff and being coupled;
When triggering strong electric model, control that engine stop runs, the first motor and the second motor run, and control the second motor and the 3rd diff is coupled, the 3rd diff and the second diff is coupled, the first motor and the second diff are coupled;
Mixed mode comprises Weak mixing pattern and strong mixed mode, wherein:
When triggering Weak mixing pattern, control driving engine operation, the first motor runs, the second motor is out of service, and control the second motor disconnect with the 3rd diff be coupled, the 3rd diff and the second diff is coupled, the first motor and the second diff are coupled, or, control that driving engine runs, the first motor is out of service, the second motor runs, and control that the second motor is coupled with the 3rd diff, the 3rd diff is coupled with the second diff, the first motor disconnects with the second diff and being coupled;
When triggering strong mixed mode, control that driving engine runs, the first motor and the second motor run, and control the second motor and the 3rd diff is coupled, the 3rd diff and the second diff is coupled, the first motor and the second diff are coupled.
This Control method for power transmission comprises further:
When triggering weak take-back model, control that engine stop runs, the first motor operates in Generator Status, the second motor is out of service, and control the 3rd diff and disconnect the first motor of the Generator Status that is coupled, operates in the second diff and the second diff is coupled;
When triggering strong take-back model, control that engine stop runs, the first motor and the second motor operate in Generator Status, and controlling run is coupled at the second motor of Generator Status and the 3rd diff is coupled, the 3rd diff and the second diff are coupled, operate in Generator Status the first motor and the second diff;
When triggering engine starting pattern, controlling engine starting, the second motor runs, and controlling that the second motor is coupled with the 3rd diff, the 3rd diff disconnects with the second diff and being coupled;
When triggering pure power generation mode, controlling engine starting, the second motor and operating in Generator Status, and control that the second motor is coupled with the 3rd diff, the 3rd diff disconnects with the second diff and being coupled;
When triggering park mode, control that engine stop runs, the first motor and the second motor out of service, and control that the second motor is coupled with the 3rd diff, the 3rd diff disconnect with the second diff be coupled, the first motor disconnects with the second diff and being coupled;
When triggering driving engine linkage pattern, control driving engine run, the first motor and the second motor out of service, and control the second motor disconnect with the 3rd diff be coupled, the 3rd diff is coupled with the second diff, the first motor disconnects with the second diff and being coupled.
Alternatively, in above-mentioned Control method for power transmission:
When hybrid vehicle is in parking operating mode, trigger park mode;
When hybrid vehicle is in engine starting operating mode, trigger engine starting pattern;
When hybrid vehicle is in the driveaway operation operating mode in default low acceleration area, trigger weak electric model;
When hybrid vehicle is in the driveaway operation operating mode in default high acceleration area, trigger strong electric model;
When hybrid vehicle is in idle stop operating mode, if the SOC of battery is higher than lower limit warning value, trigger weak electric model, if the SOC of battery is less than or equal to lower limit warning value, trigger pure power generation mode;
When hybrid vehicle is in the driving cycle in default low regime, if the SOC of battery is higher than lower limit warning value, trigger weak electric model, if the SOC of battery is less than or equal to lower limit warning value, triggers and increase journey pattern or Weak mixing pattern;
When hybrid vehicle is in the driving cycle in default middling speed interval, triggers weak electric model or strong electric model or increase journey pattern or Weak mixing pattern or strong mixed mode or pure engine mode;
When hybrid vehicle is in the cruising condition in default high velocity, trigger pure engine mode or strong mixed mode.
When hybrid vehicle is in the damped condition in default high velocity, trigger weak take-back model or strong take-back model;
When hybrid vehicle is in the damped condition in default middling speed interval, trigger weak take-back model;
When hybrid vehicle is in the damped condition in default low regime, triggers weak take-back model or increase journey pattern;
When hybrid vehicle place accelerating mode in the process of moving, trigger strong mixed mode;
When hybrid vehicle is in climbing operating mode, triggers weak electric model or strong electric model or increase journey pattern or Weak mixing pattern or strong mixed mode;
When hybrid vehicle is in descending operating mode and continues not reach default duration threshold value at the duration of descending operating mode, trigger weak take-back model or strong take-back model or increase journey pattern;
When hybrid vehicle is in descending operating mode and continues to meet or exceed default duration threshold value at the duration of descending operating mode, if the SOC of battery meets or exceeds upper limit warning value, trigger driving engine linkage pattern, if the SOC of battery does not reach upper limit warning value, trigger weak take-back model.
When hybrid vehicle is in astern condition, if the SOC of battery is higher than lower limit warning value, trigger weak electric model, if the SOC of battery is less than or equal to lower limit warning value, triggers and increase journey pattern.
As can be seen here, the present invention utilizes three difies to achieve a driving engine and two motors are coupled with the rotating speed of wheel, and, by controlling driving engine and motor cooperating operation in each driving mode, the advantage of motor can be utilized to make up the deficiency of driving engine, and the tractive performance of hybrid vehicle under various operating mode and energy regenerating can be taken into account further.
Accompanying drawing explanation
Fig. 1 is the principle structure figure of diff;
The schematic diagram of a kind of diff coupled structure that Fig. 2 adopts for the Power train in the embodiment of the present invention;
Fig. 3 is the structural representation of a kind of Power train based on diff coupled structure realization as shown in Figure 2;
Fig. 4 is the structural representation of the another kind of Power train based on diff coupled structure realization as shown in Figure 2;
The schematic diagram of the another kind of diff coupled structure that Fig. 5 adopts for the Power train in the embodiment of the present invention;
Fig. 6 is the structural representation of a kind of Power train based on diff coupled structure realization as shown in Figure 5;
Fig. 7 is the structural representation of a kind of Power train based on diff coupled structure realization as shown in Figure 5.
Detailed description of the invention
For making object of the present invention, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, the present invention is described in more detail.
Power train in the present embodiment comprises at least two difies, at least one driving engine, at least one motor; Wherein, at least two difies intercouple and connect at least one driving engine and at least one motor.Therefore, the present embodiment can utilize the diff intercoupled be coupled to the rotating speed realized between driving engine and motor and realize coupling power by the mode that rotating speed is coupled.
Refer to Fig. 1, diff generally includes: a cone gear 11, the conical surface gear frame 12 engaged with cone gear, engage and be oppositely arranged two planetary wheels 13 with conical surface gear frame 12, and, to be engaged between two planetary wheels 13 and be oppositely arranged two sun gears 14, wherein, the transmission shaft connecting cone gear 11 is main driving axle 10y, and two transmission shafts connecting sun gear 14 are counter drive shaft 10x1 and 10x2.
Rotation speed relation between the main driving axle 10y of diff and counter drive shaft 10x1 and 10x2 meets:
（N
X1+N
X2）/2=N
Y
Wherein, N
x1for rotating speed, the N of counter drive shaft 10x1
x2for rotating speed, the N of counter drive shaft 10x2
yfor the rotating speed of main driving axle 10y.
Correspondingly, in the present embodiment, when the mode transmit machine power that each diff in Power train is coupled with rotating speed, any two transmission shafts (main driving axle 10y and counter drive shaft 10x1 can be selected, main driving axle 10y and counter drive shaft 10x2, or two counter drive shaft 10x1 and 10x2) as input shaft, another transmission shaft (main driving axle 10a or counter drive shaft 10x1 or counter drive shaft 10x2) is as output shaft, also any one transmission shaft can be selected as input shaft (main driving axle 10a or counter drive shaft 10x1 or counter drive shaft 10x2), another two transmission shafts (main driving axle 10y and counter drive shaft 10x1, main driving axle 10y and counter drive shaft 10x2, or two counter drive shaft 10x1 and 10x2) as output shaft.
Thus, by passing through main driving axle 10y and counter drive shaft 10x1 and 10x2 connection in any combination between each diff, rotating speed coupling can be realized.
It should be noted that, in the prior art, main driving axle 10a can only connect power part as input shaft, and two counter drive shaft 10b then all can only connect wheel, to realize two wheels differential speed rotation under power part drives as output shaft.But in the present embodiment, effect due to diff is not limited to traditional dual wheels differential, and therefore, main driving axle 10a both can be used as input shaft, also can be used as output shaft, similarly, counter drive shaft 10b both can be used as input shaft, also can be used as output shaft.
Below, then composition graphs 2 ~ Fig. 7 the Power train in the present embodiment is further described.
First, Power train comprises two difies is that example is described.
See Fig. 2, Power train comprises an an input end diff 20-1 and mouth diff 20-0, and input end diff 20-1 comprises a main driving axle and two counter drive shafts, mouth diff 20-0 comprises a main driving axle and two counter drive shafts, wherein, the main driving axle of mouth diff 20-0 is connected with the main driving axle of input end diff 20-1.
Refer to Fig. 3 and simultaneously composition graphs 2, two counter drive shafts of input end diff 20-1 respectively one of them counter drive shaft connecting engine M3 of connecting engine M1 and M2, mouth diff 20-0, another counter drive shaft connect motor E0.
Based on structure as shown in Figure 3,3 driving engine M1 ~ M3 just can form the power generating system to motor E1.Now, two counter drive shafts of input end diff 20-1 all as input shaft, the counter drive shaft of mouth diff 20-0 connecting engine M3 as input shaft, connect another counter drive shaft of motor E1 as output shaft.
In practical application, the driving engine that can start any amount in this power generating system generates electricity to motor E1 and carrys out drive motor E1 with this, thus different power comformabilitys can be realized, and generating can not be caused to stop, to guarantee the robustness of power generating system because of the damage of a certain driving engine.
Refer to Fig. 4 and simultaneously composition graphs 2, one of them counter drive shaft of input end diff 20-1 connects a driving engine M1, another counter drive shaft connects a motor E1, and two counter drive shafts of mouth diff 20-0 all connect the wheel of automobile as input shaft.
Based on structure as shown in Figure 4, driving engine M1 and motor E1 just constitutes the Power train for driving hybrid vehicle.
In practical application, the driving engine M1 in this hybrid power system and/or motor E1 can be started, realize the different drive pattern of hybrid vehicle with this.
In addition, for the ease of realization and the switching of above-mentioned various drive pattern, the main driving axle of input end diff 20-1 and the counter drive shaft of connection motor E1 can be controlled by drg B1 and B2 respectively:
Start-up mode is realized when B1 braking, B2 release, motor E1 carrys out start the engine M1 as starter, now, input end diff 20-1 disconnects with being coupled of mouth diff 20-0, the counter drive shaft that input end diff 20-1 connects motor E1 as the counter drive shaft of input shaft, connecting engine M1 as output shaft;
Idling mode is realized when B1 braking, B2 release, driving engine M1 drive motor E1 generates electricity, now, input end diff 20-1 disconnects with being coupled of mouth diff 20-0, the counter drive shaft of input end diff 20-1 connecting engine M1 as input shaft, connect the counter drive shaft of motor E1 as output shaft;
Low-speed mode is realized when B1 release, B2 release, driving engine M1 drive motor E1 generates electricity, be with motor vehicle low cruise simultaneously, now, input end diff 20-1 is coupled with mouth diff 20-0, the counter drive shaft of input end diff 20-1 connecting engine M1 connects the counter drive shaft of motor E1 and main driving axle all as output shaft as input shaft, input end diff 20-1, the main driving axle of mouth diff 20-0 as input shaft, two counter drive shafts as output shaft;
Pure engine mode is realized when B1 release, B2 braking, driving engine M1 drives vehicle operating separately, now, input end diff 20-1 is coupled with mouth diff 20-0, the counter drive shaft of input end diff 20-1 connecting engine M1 as the main driving axle of input shaft, input end diff 20-1 as output shaft, the main driving axle of mouth diff 20-0 as input shaft, two counter drive shafts as output shaft;
Electric-only mode is realized when B1 release, B2 release, driving engine M1 (self-locking) out of service, motor E1 drives vehicle operating separately, now, input end diff 20-1 is coupled with mouth diff 20-0, the counter drive shaft that input end diff 20-1 connects motor E1 as the main driving axle of input shaft, input end diff 20-1 as output shaft, the main driving axle of mouth diff 20-0 as input shaft, two counter drive shafts as output shaft;
Mixed mode is realized when B1 release, B2 release, driving engine M1 and motor E1 drives vehicle operating jointly, now, input end diff 20-1 is coupled with mouth diff 20-0, two counter drive shafts of input end diff 20-1 all as the main driving axle of input shaft, input end diff 20-1 as output shaft, the main driving axle of mouth diff 20-0 as input shaft, two counter drive shafts as output shaft;
Moment Brake energy recovery pattern is realized when B1 release, B2 release, wheel is braked, the drive motor E1 generating simultaneously of driving engine M1 and wheel, now, input end diff 20-1 is coupled with mouth diff 20-0, two counter drive shafts of mouth diff 20-0 are as input shaft, main driving axle as output shaft, and the main driving axle of input end diff 20-1 and the counter drive shaft of input end diff 20-1 connecting engine M1 all connect the counter drive shaft of motor E as output shaft as input shaft, input end diff 20-1;
Long slow energy regenerating is realized when B1 release, B2 release, driving engine M1 (self-locking) out of service, wheel drive motors E1 generates electricity, now, input end diff 20-1 is coupled with mouth diff 20-0, two counter drive shafts of mouth diff 20-0 are as input shaft, main driving axle as output shaft, and the main driving axle of input end diff 20-1 connects the counter drive shaft of motor E as output shaft as input shaft, input end diff 20-1;
Engine braking modes is realized when B1 release, B2 braking, driving engine M1 linked wheel to wheel decelerates, now, input end diff 20-1 is coupled with mouth diff 20-0, the counter drive shaft of input end diff 20-1 connecting engine M1 as the main driving axle of input shaft, input end diff 20-1 as output shaft, the main driving axle of mouth diff 20-0 as input shaft, two counter drive shafts as output shaft.
Because driving engine M1 a few operation point often only in its full-throttle characteristics can produce high efficiency, motor E1 then has broad efficient district, therefore, the several modes that driving engine M1 and motor E1 runs simultaneously can make that driving engine M1 is constant remains on the work of high efficiency point, can make up the deficiency of driving engine M1 like this by motor E1.
Certainly, the diff of power drive system also can more than two.
See Fig. 5, Power train comprises at least two input end diff 50-1 ~ 50-m and mouth diff 50-0, wherein, at least two input end diff 50-1 ~ 50-m concatenated in order, the main driving axle being positioned at an input end diff 50-1 of cascade head end is connected with the main driving axle of mouth diff 50-0, the main driving axle of remaining each input end diff 50-i and the input end diff 50-(i-1 of upper class) a counter drive shaft be connected.M is the positive integer, the i that are more than or equal to 2 is the positive integer being greater than 1 and being less than or equal to m.Like this, utilize m input end diff and 1 mouth diff, be namely total to m+1 diff, the coupling of m+3 power part can be realized at most.
In practical application, the each counter drive shaft being positioned at an input end diff 50-m of cascade tail end connects a driving engine respectively, remaining input terminal diff 50-1 ~ 50-(m-1) in each a counter drive shaft connect a driving engine, another counter drive shaft cascade next stage, one of them counter drive shaft of mouth diff 50-0 connects a driving engine, another counter drive shaft connects a motor.Like this, the effect identical with structure as shown in Figure 3 can be produced, and, also achieve the quantity expansion of power part compared to structure as shown in Figure 3 and improve power comformability and robustness further.
Or, the each counter drive shaft being positioned at an input end diff 50-m of cascade tail end connects a driving engine or motor respectively, remaining input terminal diff 50-1 ~ 50-(m-1) in each a counter drive shaft connect the input end diff of a driving engine or motor, another counter drive shaft cascade next stage, two counter drive shafts of mouth diff all connect wheel as input shaft.Like this, the effect identical with structure as shown in Figure 4 can be produced, and the quantity also achieving power part compared to structure is as shown in Figure 4 expanded and further increases the variety of drive pattern.
Refer to Fig. 6 and simultaneously composition graphs 5,2 are got for m, the each counter drive shaft being positioned at an input end diff 50-2 of cascade tail end connects driving engine M4 and M3 respectively, one of them counter drive shaft being positioned at another input end diff 50-1 of cascade head end connects the input end diff 50-2 of a driving engine M2, another its next stage of counter drive shaft cascade, and one of them counter drive shaft of mouth diff 50-0 connects a driving engine M1, another counter drive shaft connects a motor E1.
Based on structure as shown in Figure 6,4 driving engine M1 ~ M4 just can form the power generating system to motor E1, and, utilize 2 input end difies and 1 mouth diff, i.e. totally 3 difies, achieve the coupling of 4 driving engine M1 ~ M4 and 1 motor E1 totally 5 power parts.Now, the counter drive shaft of input end diff 50-1 and 50-2 all as input shaft, the counter drive shaft of mouth diff 50-0 connecting engine M3 as input shaft, connect another counter drive shaft of motor E1 as output shaft.
In practical application, with Fig. 3 in like manner, the driving engine that can start any amount in this power generating system generates electricity to motor E1 and carrys out drive motor E1 with this, thus different power comformabilitys can be realized, and generating can not be caused to stop, to guarantee the robustness of power generating system because of the damage of a certain driving engine.
Refer to Fig. 7 and simultaneously composition graphs 5,2 are got for m, the counter drive shaft being positioned at an input end diff 50-2 of cascade tail end connects a driving engine M1, another counter drive shaft connects a motor E2, the counter drive shaft being positioned at an input end diff 50-1 of cascade head end connects a motor E1, another counter drive shaft connects the main driving axle being positioned at the input end diff 50-2 of cascade tail end, and two counter drive shafts of mouth diff 50-0 connect wheel.
Based on structure as shown in Figure 7, driving engine M1 and motor E1 and E2 just constitutes the Power train for driving hybrid vehicle.
In practical application, the driving engine M1 in this hybrid power system and any one in motor E1 and E3 or combination in any can be started, realize the different drive pattern of hybrid vehicle with this.And, for the ease of realization and the switching of various drive pattern, the counter drive shaft of counter drive shaft and input end diff 50-2 connection motor E2 that the main driving axle of input end diff 50-2, input end diff 50-1 connect motor E1 can be controlled by drg B0 and B1 and B2 respectively.
Because structure is as shown in Figure 7 the preferred Power train of one being applicable to hybrid vehicle, therefore, the present embodiment provides a kind of Control method for power transmission for this Power train, in order to control realization and the switching of various drive pattern, is described in detail below to this Control method for power transmission.
1), when hybrid vehicle triggers pure engine mode, control driving engine M1 run and be coupled by input end diff 50-2 and input end diff 50-1, and it is out of service to control motor E1 and E2, and disconnects being coupled of motor E1 and input end diff 50-1, disconnect being coupled of motor E2 and input end diff 50-1.Specifically:
Control driving engine M1 operation, motor E1 and E2 is out of service, and control B0 discharges, B1 and B2 braking, to make that input end diff 50-2 intercouples with input end diff 50-1, motor E2 disconnect with input end diff 50-2 be coupled, motor E1 disconnects with input end diff 50-1 and being coupled, thus the rotating speed driving to input end diff 50-1 by input diff 50-2 by driving engine M1 drives wheel and makes vehicle operating.
2), when hybrid vehicle triggers electric-only mode, control driving engine M1 (self-locking) out of service, and control motor E1 and input end diff 50-1 and to be coupled and/or motor E2 is coupled by input end diff 50-2 and input end diff 50-1.Specifically:
Control driving engine M1 (self-locking) out of service, motor E1 operation, motor E2 is out of service, and control B0 and B2 brakes, B1 release, to disconnect with input end diff 50-1 to make input end diff 50-2 be coupled, motor E2 disconnect with input end diff 50-2 be coupled, motor E1 is coupled with input end diff 50-1, thus the rotating speed driving to input end diff 50-1 by motor E1 drives wheel and makes vehicle operating;
Or, control driving engine M1 (self-locking) out of service, motor E1 are out of service, motor E2 runs, and control B0 and B2 discharges, B1 braking, to make that motor E2 is coupled with input end diff 50-2, input end diff 50-2 intercouples with input end diff 50-1, motor E1 disconnects with input end diff 50-1 and being coupled, thus the rotating speed driving to input end diff 50-1 by input diff 50-2 by motor E2 drives wheel and makes vehicle operating;
Again or, control driving engine M1 (self-locking) out of service, motor E1 and E2 run, and control B0 ~ B2 all discharges, to make, motor E2 and input end diff 50-2 is coupled, input end diff 50-2 and input end diff 50-1 is coupled, motor E1 and input end diff 50-1 is coupled, thus the rotating speed be coupled at input end diff 50-1 by motor E1 and E2 drives wheel and makes vehicle operating.
In three kinds of above-mentioned situations, first two situation is called weak electric model, latter event is called strong electric model, and when selecting light current dynamic model formula, consider driving efficiency, preferred E1 drives the first situation of vehicle operating.
3), when hybrid vehicle triggers combination drive pattern, control driving engine M1 run and be coupled by input end diff 50-2 and input end diff 50-1, and control motor E1 operation and to be coupled with input end diff 50-1 and/or motor E2 is run and is coupled by input end diff 50-2 and input end diff 50-1.Specifically:
Control driving engine M1 operation, motor E1 runs, motor E2 is out of service, and control B0 and B1 discharges, B2 braking, to make, input end diff 50-2 intercouples with input end diff 50-1, motor E1 is coupled with input end diff 50-1, thus the rotating speed be coupled at input end diff 50-1 by driving engine M1 and motor E1 drives wheel and makes vehicle operating;
Or, control driving engine M1 runs, motor E1 is out of service, motor E2 runs, and control B0 and B2 discharges, B1 braking, to make that motor E2 is coupled with input end diff 50-2, input end diff 50-2 intercouples with input end diff 50-1, motor E1 disconnects with input end diff 50-1 and being coupled, thus be coupled at input diff 50-2 by driving engine M1 and motor E2 and drive to the rotating speed driving wheel of input end diff 50-1 and make vehicle operating;
Again or, control driving engine M1 runs, motor E1 and E2 runs, and control B0 ~ B2 all discharges, to make, motor E2 and input diff 50-2 are coupled, input end diff 50-2 and input end diff 50-1 is coupled, motor E1 and input end diff 50-1 is coupled, thus the rotating speed be coupled at input end diff 50-1 by driving engine M1 and motor E1 and E2 drives wheel and makes vehicle operating.
In three kinds of above-mentioned situations, first two situation is called Weak mixing pattern, latter event is called strong mixed mode.
4), when hybrid vehicle trigger increase journey pattern time, control driving engine M1 run and be coupled with the motor E2 entering Generator Status by input end diff 50-2, input end diff 50-2 disconnect with input end diff 50-1 be coupled, motor E1 and input end diff 50-1 is coupled.Specifically:
Control driving engine M1 operation, motor E2 enters Generator Status, motor E1 runs, and control B0 brakes, B1 and B2 release, to make that motor E2 is coupled with input end diff 50-2, input end diff 50-2 disconnect with input end diff 50-1 be coupled, motor E1 and input end diff 50-1 is coupled, thus, the rotating speed being driven to input end diff 50-1 by motor E1 drives wheel make vehicle operating, and the rotating speed drive motor E2 simultaneously also driving to input end diff 50-0 by driving engine M1 charges to battery.
Because driving engine M1 a few operation point often only in its full-throttle characteristics can produce high efficiency, motor E1 and E2 then has broad efficient district, therefore, the electric-only mode, the mixed mode that run based on driving engine M1 and motor E1 and/or E2 and increase journey pattern and can make that driving engine M1 is constant remains on the work of high efficiency point, can make up the deficiency of driving engine M1 simultaneously like this by motor E1 and/or E2.
5), when hybrid vehicle trigger energy take-back model, control engine stop operation and at least control motor E1 to operate in Generator Status (for motor E1 and E2, other operations herein except clear and definite " Generator Status " all refer to and operate in electric motor state).Specifically:
Control driving engine M1 (self-locking) out of service, motor E1 operates in Generator Status, motor E2 is out of service, and control B0 brakes, B1 discharges, B2 brakes or release, to make input end diff 50-2 and input end diff 50-1 disconnect to be coupled, to operate in the motor E1 of Generator Status to be coupled with input end diff 50-1, thus the rotating speed being passed to input end diff 50-1 by output differential 50-0 by wheel can charge to battery by drive motor E1;
Or, control driving engine M1 (self-locking) out of service, motor E1 and E2 operates in Generator Status, and control B0 ~ B2 discharges, be coupled with the motor E2 and input end diff 50-2 that make to operate in Generator Status, input end diff 50-2 and input end diff 50-1 is coupled, the motor E1 operating in Generator Status is coupled with input end diff 50-1, thus the rotating speed being passed to input end diff 50-1 by output differential 50-0 by wheel can charge to battery by drive motor E1, and by the input end diff 50-1 that intercouples and input end diff 50-2 drive motor E2, battery is charged.
In two kinds of above-mentioned situations, the previous case is called weak take-back model, latter event is called strong take-back model.
Based on above-mentioned energy recuperation mode, the recovery of energy can be realized under the operating modes such as such as brake, descending.
6), when hybrid vehicle triggers engine starting pattern, control that driving engine M1 starts, motor E2 runs, and control that motor E2 is coupled with input end diff 50-2, input end diff 50-2 disconnects with input end diff 50-1 and being coupled.Specifically:
Control driving engine M1 starts, motor E2 runs, and control B0 brake, B1 braking or release, B2 release, to make that motor E2 is coupled with input end diff 50-2, input end diff 50-2 disconnects with input end diff 50-1 and being coupled, thus be coupled to the rotating speed of input end diff 50-2 by motor E2 can the startup of auxiliary engine M1.
7), when hybrid vehicle triggers pure power generation mode, control that driving engine M1 starts, motor E2 operates in Generator Status, and control that motor E2 is coupled with input end diff 50-2, input end diff 50-2 disconnects with input end diff 50-1 and being coupled.Specifically:
Control driving engine M1 starts, motor E2 operates in Generator Status, and control B0 brake, B1 braking or release, B2 release, to make that motor E2 is coupled with input end diff 50-2, input end diff 50-2 disconnects with input end diff 50-1 and being coupled, thus the rotating speed being coupled to input end diff 50-2 by driving engine M1 can charge to battery by drive motor E2.
8), when hybrid vehicle triggers park mode, control driving engine M1 (self-locking) out of service, motor E1 and E2 be also all out of service, and control that motor E2 is coupled with input end diff 50-2, input end diff 50-2 disconnect with input end diff 50-1 be coupled, motor E1 disconnects with input end diff 50-1 and being coupled.Specifically:
Control driving engine M1 (self-locking) out of service, motor E1 and E2 out of service, and control B0 brakes, B1 brakes, B2 release, to make that motor E2 is coupled with input end diff 50-2, input end diff 50-2 disconnect with input end diff 50-1 be coupled, motor E1 disconnects with input end diff 50-1 and being coupled, can the startup of auxiliary engine M1 directly can control during engine starting pattern to be triggered that motor E2 runs and be coupled to the rotating speed of input end diff 50-2 by motor E2.
9), when hybrid vehicle triggers driving engine linkage pattern, control that driving engine M1 runs, motor E1 and E2 is all out of service, and control motor E2 disconnect with input end diff 50-2 be coupled, input end diff 50-2 is coupled with input end diff 50-1, motor E1 disconnects with input end diff 50-1 and being coupled.Specifically:
Control driving engine M1 operation, motor E1 and E2 is out of service, and control B0 discharges, B1 and B2 braking, to disconnect with input end diff 50-2 to make motor E2 be coupled, input end diff 50-2 is coupled with input end diff 50-1, motor E1 disconnects with input end diff 50-1 and being coupled, thus enables driving engine M1 by input end diff 50-2 and input end diff 50-1 and mouth diff 50-0 linked wheel brake snub.
In addition, in order to improve the tractive performance of hybrid vehicle, the Control method for power transmission in the present embodiment can also correspondingly trigger above-mentioned various drive pattern for different working conditions, specific as follows:
When hybrid vehicle is in parking operating mode, trigger park mode;
When hybrid vehicle is in engine starting operating mode, trigger engine starting pattern;
When hybrid vehicle is in the driveaway operation operating mode in default low acceleration area, trigger weak electric model;
When hybrid vehicle is in the driveaway operation operating mode in default high acceleration area, trigger strong electric model;
When hybrid vehicle is in idle stop operating mode, if the SOC(stateofcapacity of battery, capacity status) then trigger weak electric model higher than lower limit warning value (such as 30%), if the SOC of battery is less than or equal to lower limit warning value, trigger pure power generation mode;
When hybrid vehicle is in the driving cycle in default low regime, if the SOC of battery is higher than lower limit warning value, trigger weak electric model, if the SOC of battery is less than or equal to lower limit warning value, triggers and increase journey pattern or Weak mixing pattern;
When hybrid vehicle is in the driving cycle in default middling speed interval, triggers weak electric model or strong electric model or increase journey pattern or Weak mixing pattern or strong mixed mode or pure engine mode;
When hybrid vehicle is in the cruising condition in default high velocity, trigger pure engine mode (current driving speed is positioned at the high efficiency point of driving engine M1) or strong mixed mode.
When hybrid vehicle is in the damped condition in default high velocity, trigger weak take-back model or strong take-back model;
When hybrid vehicle is in the damped condition in default middling speed interval, trigger weak take-back model;
When hybrid vehicle is in the damped condition in default low regime, triggers weak take-back model or increase journey pattern;
When hybrid vehicle place accelerating mode in the process of moving, trigger strong mixed mode;
When hybrid vehicle is in climbing operating mode, triggers weak electric model or strong electric model or increase journey pattern or Weak mixing pattern or strong mixed mode;
When hybrid vehicle is in descending operating mode and continues not reach default duration threshold value (namely descending visite) at the duration of descending operating mode, trigger weak take-back model or strong take-back model or increase journey pattern;
When hybrid vehicle is in descending operating mode and continues to meet or exceed default duration threshold value (i.e. lower long slope) at the duration of descending operating mode, if the SOC of battery meets or exceeds upper limit warning value (such as 80%), trigger driving engine linkage pattern, if the SOC of battery does not reach upper limit warning value, trigger weak take-back model.
When hybrid vehicle is in astern condition, if the SOC of battery is higher than lower limit warning value, trigger weak electric model, if the SOC of battery is less than or equal to lower limit warning value, triggers and increase journey pattern.
Above various working conditions can be monitored by the entire car controller of hybrid vehicle or input corresponding instruction by chaufeur to entire car controller.
Except above-mentioned Power train and Control method for power transmission, the present embodiment additionally provides a kind of hybrid vehicle, and this hybrid vehicle comprises Power train as above.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. the Control method for power transmission of a hybrid vehicle, it is characterized in that, this Control method for power transmission is applied to the Power train of hybrid vehicle, and this Power train comprises the first diff, the second diff, the 3rd diff, the first motor and the second motor and driving engine; Wherein, two counter drive shafts of the first diff connect wheel, the main driving axle of the first diff connects the main driving axle of the second diff, the main driving axle that a counter drive shaft connects the first motor, another counter drive shaft connects the 3rd diff of the second diff, a counter drive shaft of the 3rd diff connects the second motor, another counter drive shaft connecting engine; This Control method for power transmission comprises:
When triggering pure engine mode, control driving engine run and be coupled by the 3rd diff and the second diff, and control the first motor and the second motor is out of service and being coupled of disconnection the first motor and the second diff, disconnect being coupled of the second motor and the 3rd diff;
When triggering electric-only mode, controlling engine stop and running, and control the first motor and run and to be coupled with the second diff and/or the second motor is run and is coupled by the 3rd diff and the second diff;
When triggering combination drive pattern, control driving engine run and be coupled by the 3rd diff and the second diff, and control the first motor operation and to be coupled with the second diff and/or the second motor is run and is coupled by the 3rd diff and the second diff;
When trigger increase journey pattern time, control driving engine run and be coupled with the second motor entering Generator Status by the 3rd diff, the 3rd diff disconnect with the second diff be coupled, the first motor and the second diff be coupled.
2. Control method for power transmission according to claim 1, is characterized in that, electric-only mode comprises weak electric model and strong electric model, wherein:
When triggering weak electric model, control engine stop operation, the first motor runs, the second motor is out of service, and control the second motor disconnect with the 3rd diff be coupled, the 3rd diff disconnect with the second diff be coupled, the first motor and the second diff be coupled, or, control that engine stop runs, the first motor is out of service, the second motor runs, and control that the second motor is coupled with the 3rd diff, the 3rd diff is coupled with the second diff, the first motor disconnects with the second diff and being coupled;
When triggering strong electric model, control that engine stop runs, the first motor and the second motor run, and control the second motor and the 3rd diff is coupled, the 3rd diff and the second diff is coupled, the first motor and the second diff are coupled.
3. Control method for power transmission according to claim 1, is characterized in that, mixed mode comprises Weak mixing pattern and strong mixed mode, wherein:
When triggering Weak mixing pattern, control driving engine operation, the first motor runs, the second motor is out of service, and control the second motor disconnect with the 3rd diff be coupled, the 3rd diff and the second diff is coupled, the first motor and the second diff are coupled, or, control that driving engine runs, the first motor is out of service, the second motor runs, and control that the second motor is coupled with the 3rd diff, the 3rd diff is coupled with the second diff, the first motor disconnects with the second diff and being coupled;
When triggering strong mixed mode, control that driving engine runs, the first motor and the second motor run, and control the second motor and the 3rd diff is coupled, the 3rd diff and the second diff is coupled, the first motor and the second diff are coupled.
4. Control method for power transmission according to claim 1, is characterized in that, this Control method for power transmission comprises further:
When trigger energy take-back model, control engine stop operation and at least control the first motor to enter Generator Status.
5. Control method for power transmission according to claim 4, is characterized in that, energy recuperation mode comprises strong take-back model and weak take-back model, wherein:
When triggering weak take-back model, control that engine stop runs, the first motor operates in Generator Status, the second motor is out of service, and control the 3rd diff and disconnect the first motor of the Generator Status that is coupled, operates in the second diff and the second diff is coupled;
When triggering strong take-back model, control that engine stop runs, the first motor and the second motor operate in Generator Status, and controlling run is coupled at the second motor of Generator Status and the 3rd diff is coupled, the 3rd diff and the second diff are coupled, operate in Generator Status the first motor and the second diff.
6. Control method for power transmission according to claim 1, is characterized in that, this Control method for power transmission comprises further:
When triggering engine starting pattern, controlling engine starting, the second motor runs, and controlling that the second motor is coupled with the 3rd diff, the 3rd diff disconnects with the second diff and being coupled;
When triggering park mode, control that engine stop runs, the first motor and the second motor out of service, and control that the second motor is coupled with the 3rd diff, the 3rd diff disconnect with the second diff be coupled, the first motor disconnects with the second diff and being coupled.
7. Control method for power transmission according to claim 1, is characterized in that, this Control method for power transmission comprises further:
When triggering pure power generation mode, controlling engine starting, the second motor and operating in Generator Status, and control that the second motor is coupled with the 3rd diff, the 3rd diff disconnects with the second diff and being coupled.
8. Control method for power transmission according to claim 1, is characterized in that, this Control method for power transmission comprises further:
When triggering driving engine linkage pattern, control driving engine run, the first motor and the second motor out of service, and control the second motor disconnect with the 3rd diff be coupled, the 3rd diff is coupled with the second diff, the first motor disconnects with the second diff and being coupled.
9. Control method for power transmission according to claim 1, is characterized in that,
Electric-only mode comprises weak electric model and strong electric model, wherein:
When triggering weak electric model, control engine stop operation, the first motor runs, the second motor is out of service, and control the second motor disconnect with the 3rd diff be coupled, the 3rd diff disconnect with the second diff be coupled, the first motor and the second diff be coupled, or, control that engine stop runs, the first motor is out of service, the second motor runs, and control that the second motor is coupled with the 3rd diff, the 3rd diff is coupled with the second diff, the first motor disconnects with the second diff and being coupled;
When triggering strong electric model, control that engine stop runs, the first motor and the second motor run, and control the second motor and the 3rd diff is coupled, the 3rd diff and the second diff is coupled, the first motor and the second diff are coupled;
Mixed mode comprises Weak mixing pattern and strong mixed mode, wherein:
When triggering Weak mixing pattern, control driving engine operation, the first motor runs, the second motor is out of service, and control the second motor disconnect with the 3rd diff be coupled, the 3rd diff and the second diff is coupled, the first motor and the second diff are coupled, or, control that driving engine runs, the first motor is out of service, the second motor runs, and control that the second motor is coupled with the 3rd diff, the 3rd diff is coupled with the second diff, the first motor disconnects with the second diff and being coupled;
When triggering strong mixed mode, control that driving engine runs, the first motor and the second motor run, and control the second motor and the 3rd diff is coupled, the 3rd diff and the second diff is coupled, the first motor and the second diff are coupled;
This Control method for power transmission comprises further:
When triggering weak take-back model, control that engine stop runs, the first motor operates in Generator Status, the second motor is out of service, and control the 3rd diff and disconnect the first motor of the Generator Status that is coupled, operates in the second diff and the second diff is coupled;
When triggering strong take-back model, control that engine stop runs, the first motor and the second motor operate in Generator Status, and controlling run is coupled at the second motor of Generator Status and the 3rd diff is coupled, the 3rd diff and the second diff are coupled, operate in Generator Status the first motor and the second diff;
When triggering engine starting pattern, controlling engine starting, the second motor runs, and controlling that the second motor is coupled with the 3rd diff, the 3rd diff disconnects with the second diff and being coupled;
When triggering pure power generation mode, controlling engine starting, the second motor and operating in Generator Status, and control that the second motor is coupled with the 3rd diff, the 3rd diff disconnects with the second diff and being coupled;
When triggering park mode, control that engine stop runs, the first motor and the second motor out of service, and control that the second motor is coupled with the 3rd diff, the 3rd diff disconnect with the second diff be coupled, the first motor disconnects with the second diff and being coupled;
When triggering driving engine linkage pattern, control driving engine run, the first motor and the second motor out of service, and control the second motor disconnect with the 3rd diff be coupled, the 3rd diff is coupled with the second diff, the first motor disconnects with the second diff and being coupled.
10. Control method for power transmission according to claim 9, is characterized in that,
When hybrid vehicle is in parking operating mode, trigger park mode;
When hybrid vehicle is in engine starting operating mode, trigger engine starting pattern;
When hybrid vehicle is in the driveaway operation operating mode in default low acceleration area, trigger weak electric model;
When hybrid vehicle is in the driveaway operation operating mode in default high acceleration area, trigger strong electric model;
When hybrid vehicle is in idle stop operating mode, if the SOC of battery is higher than lower limit warning value, trigger weak electric model, if the SOC of battery is less than or equal to lower limit warning value, trigger pure power generation mode;
When hybrid vehicle is in the driving cycle in default low regime, if the SOC of battery is higher than lower limit warning value, trigger weak electric model, if the SOC of battery is less than or equal to lower limit warning value, triggers and increase journey pattern or Weak mixing pattern;
When hybrid vehicle is in the driving cycle in default middling speed interval, triggers weak electric model or strong electric model or increase journey pattern or Weak mixing pattern or strong mixed mode or pure engine mode;
When hybrid vehicle is in the cruising condition in default high velocity, trigger pure engine mode or strong mixed mode;
When hybrid vehicle is in the damped condition in default high velocity, trigger weak take-back model or strong take-back model;
When hybrid vehicle is in the damped condition in default middling speed interval, trigger weak take-back model;
When hybrid vehicle is in the damped condition in default low regime, triggers weak take-back model or increase journey pattern;
When hybrid vehicle place accelerating mode in the process of moving, trigger strong mixed mode;
When hybrid vehicle is in climbing operating mode, triggers weak electric model or strong electric model or increase journey pattern or Weak mixing pattern or strong mixed mode;
When hybrid vehicle is in descending operating mode and continues not reach default duration threshold value at the duration of descending operating mode, trigger weak take-back model or strong take-back model or increase journey pattern;
When hybrid vehicle is in descending operating mode and continues to meet or exceed default duration threshold value at the duration of descending operating mode, if the SOC of battery meets or exceeds upper limit warning value, trigger driving engine linkage pattern, if the SOC of battery does not reach upper limit warning value, trigger weak take-back model;
When hybrid vehicle is in astern condition, if the SOC of battery is higher than lower limit warning value, trigger weak electric model, if the SOC of battery is less than or equal to lower limit warning value, triggers and increase journey pattern.
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