CN102358282A - Method for controlling integrated transmission system of dual-motor pure electric automobile - Google Patents
Method for controlling integrated transmission system of dual-motor pure electric automobile Download PDFInfo
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- CN102358282A CN102358282A CN2011102578065A CN201110257806A CN102358282A CN 102358282 A CN102358282 A CN 102358282A CN 2011102578065 A CN2011102578065 A CN 2011102578065A CN 201110257806 A CN201110257806 A CN 201110257806A CN 102358282 A CN102358282 A CN 102358282A
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Abstract
The invention provides a method for controlling an integrated transmission system of a dual-motor pure electric automobile. The system comprises an entire automobile controller, a first motor controller, a second motor controller, a first low-speed driving motor, a second high-seed driving motor, a first automatic clutch, a second automatic clutch and a power coupler, wherein the first automatic clutch and the second automatic clutch are connected with the first low-speed driving motor and the second high-speed driving motor respectively. In the method, different power can be provided by the two motors and comprehensive output can be realized by the power coupler according to the requirements of a driver, so that the traveling efficiency of the electric vehicle is optimized, and energy cost is lowered.
Description
Technical field
The present invention relates to a kind of control method of hybrid power transmission system, especially, relate to the control method of the integrated driving system of a kind of double-motor pure electric automobile.
Background technology
Existing pure electric coach drive system is to adopt single drive motor to add the drive system that change speed gear box or single drive motor add mechanical automatic speed-changing case (AMT) form basically.Only being provided with independent drive motor in the electronlmobil has a lot of shortcomings, such as: 1, when the drive motor in single motor-driven pure electric coach breaks down, can only vehicle be towed back to the maintenance station maintenance, bring a lot of troubles to the user; 2, under the driving cycle of city, vehicle generally operates in low regime, and the drive motor of single motor-driven pure electric coach can often operate in the low efficiency district, can increase the energy consumption of car load like this; 3, the single motor of employing adds the automatic gear shifting control system more complicated of the pure electric coach of mechanical automatic gearbox form, can increase the design difficulty of whole-control system like this; 4, the ram ratio that the pure electric coach that adopts single motor to add the mechanical automatic gearbox form receives when autoshift is bigger, can reduce the traveling comfort of vehicle like this.
Summary of the invention
The present invention is in order to address the above problem; The control method of the integrated driving system of a kind of double-motor pure electric automobile is provided; Wherein this driving system comprises entire car controller, first electric machine controller, second electric machine controller, the first driven at low speed motor, the second high-speed driving motor, first self-acting clutch and second self-acting clutch and the power coupler that are connected with the second high-speed driving motor with the first driven at low speed motor respectively; Wherein power coupler is made up of two cover autoshift actuating unit AMT of the gear with four different drive ratios; The control method of this driving system is: the information that entire car controller collects according to vehicle sensors judges whether the work of each parts of car load is normal; If each parts all are in normal working, entire car controller will be according to the driving intention of chaufeur and vehicle parameter to each parts transmitting control commands, and according to the speed of a motor vehicle and threshold value V1; The different gear of relatively implementing of V2 and V3 is controlled, wherein V1 < V2 < V3; When the first and second self-acting clutch mode of operations just often; And the speed of a motor vehicle is greater than 0 during less than V1; AMT1 in the vehicle control unit controls power coupler is in 1 P PARK Position P; AMT2 is in 1 P PARK Position P, controls the first driven at low speed motor then and the second high-speed driving motor moves simultaneously, to provide vehicle launch needed moment of torsion.
Preferably; When the first and second self-acting clutch mode of operations just often; And when vehicle speed more than or equal to V1 during less than V2 (wherein V1 < V2), the AMT1 in the vehicle control unit controls power coupler is in 2 P PARK Position Ps, AMT2 is in 1 P PARK Position P; Control the first driven at low speed motor then and the second high-speed driving motor moves simultaneously, with the moment of torsion that provides vehicle to need when the low cruise.
Preferably; When the first and second self-acting clutch mode of operations just often, and when vehicle speed more than or equal to V2 during less than V3 (wherein, V2 < V3); AMT1 in the vehicle control unit controls power coupler is in 2 P PARK Position Ps; AMT2 is in 2 P PARK Position Ps, controls the first driven at low speed motor then and the second high-speed driving motor moves simultaneously, with the moment of torsion that provides vehicle when middling speed is moved, to need.
Preferably; When the first and second self-acting clutch mode of operations just often, and when vehicle speed during more than or equal to V3, the AMT1 in the vehicle control unit controls power coupler is in Neutral Position; AMT2 is in 2 P PARK Position Ps; The first driven at low speed motor is shut down, the operation of the second high-speed driving motor, the moment of torsion of demand so that the vehicle high-speed cruising to be provided.
Preferably, when the first and second self-acting clutch mode of operations just often, but when there is fault in AMT1; AMT1 in the vehicle control unit controls power coupler is in Neutral Position or manually AMT1 is picked neutral gear; The first driven at low speed motor is shut down, and the operation of the second high-speed driving motor is when the speed of a motor vehicle makes AMT2 be in 1 P PARK Position P greater than 0 during less than V2; When the speed of a motor vehicle makes AMT2 be in 2 P PARK Position Ps during more than or equal to V2, the moment of torsion of demand so that vehicle operating to be provided.
Preferably, when the first and second self-acting clutch mode of operations just often, but when there is fault in AMT2; AMT2 in the vehicle control unit controls power coupler is in Neutral Position or manually AMT2 is picked neutral gear; The second high-speed driving motor is shut down, and the operation of the first driven at low speed motor is when the speed of a motor vehicle makes AMT1 be in 1 P PARK Position P greater than 0 during less than V1; When the speed of a motor vehicle makes AMT1 be in 2 P PARK Position Ps during more than or equal to V1, the moment of torsion of demand so that vehicle operating to be provided.
Preferably; When the first and second self-acting clutch mode of operations just often, but the first driven at low speed motor is when existing fault, the AMT1 in the vehicle control unit controls power coupler is in Neutral Position; Make the operation of the second high-speed driving motor then; When the speed of a motor vehicle makes AMT2 be in 1 P PARK Position P greater than 0 during less than V2, when the speed of a motor vehicle makes AMT2 be in 2 P PARK Position Ps during more than or equal to V2, the moment of torsion of demand so that vehicle operating to be provided.
Preferably; When the first and second self-acting clutch mode of operations just often, but the second high-speed driving motor is when existing fault, the AMT2 in the vehicle control unit controls power coupler is in Neutral Position; Make the operation of the first driven at low speed motor then; When the speed of a motor vehicle makes AMT1 be in 1 P PARK Position P greater than 0 during less than V1, when the speed of a motor vehicle makes AMT1 be in 2 P PARK Position Ps during more than or equal to V1, the moment of torsion of demand so that vehicle operating to be provided.
Preferably; When first self-acting clutch breaks down and can not break off; When AMT1 carries out gear-change operation, second self-acting clutch is separated, AMT1 carries out the gear shift action then; Second self-acting clutch was rejoined after gear shift was accomplished, and was coupled as new gear by AMT1 and AMT2 and carried out takeoff output.
Preferably; When second self-acting clutch breaks down and can not break off; When AMT2 carries out gear-change operation, first self-acting clutch is separated, AMT2 carries out the gear shift action then; First self-acting clutch was rejoined after gear shift was accomplished, and was coupled as new gear by AMT1 and AMT2 and carried out takeoff output.
Preferably, when first self-acting clutch and second self-acting clutch break down simultaneously, make that among the AMT1 and AMT2 is in Neutral Position in the power coupler, another carries out gear shift according to shift control strategy.
Through adopting the control method of driving system of the present invention, the efficiency optimizationization that can elec. vehicle gone has reduced the cost that energy uses, and can under different driving conditions, go according to the needs of chaufeur.
Those skilled in the art are not difficult to find out that double-motor couple drive control method of the present invention comprises the combination in any of above-mentioned scenarios.
Description of drawings
Fig. 1 is the scheme drawing according to a most preferred embodiment of the driving system that has adopted control method of the present invention.
The specific embodiment
In order more to be expressly understood the present invention, combine accompanying drawing to describe a most preferred embodiment of the double-motor coupling drive system that the present invention adopts now.With reference to Fig. 1, this system comprises power battery pack 12, power battery management system 13, entire car controller 14, high-tension distribution box 11, first electric machine controller 9, second electric machine controller 10, the first driven at low speed motor 1, the second high-speed driving motor 2, first self-acting clutch 3, second self-acting clutch 4, power coupler 5, diff 6, drive wheel 7 and operator's compartment display system 15.
Wherein power battery pack 12 is mainly this double-motor coupling drive system electric energy is provided, and can adopt lithium-ion-power cell or Ni-MH power cell; The radical function of battery management system 13 is operational factors such as voltage, electric current and temperature of each cell in the monitoring power battery pack 12, and in real time the dump energy of battery is calculated; The radical function of entire car controller 14 is control commands of confirming to be sent to first electric machine controller 9, second electric machine controller 10, first self-acting clutch 3, second self-acting clutch 4 according to the status information of each parts in the car load, to satisfy the needs that go of vehicle.
The radical function of first electric machine controller 9 is runnings of controlling the first driven at low speed motor 1 according to the control command of entire car controller 14; Second electric machine controller 10 mainly be that control command according to entire car controller 14 cooperates first electric machine controller 9 to control the running of the second high-speed driving motor 2; The first driven at low speed motor 1 mainly is according to the control command of first electric machine controller 9, and corresponding torque is provided; The second high-speed driving motor 2 mainly is according to the control command of second electric machine controller 10, and corresponding torque is provided;
First self-acting clutch 3 is connected with the second high-speed driving motor 2 with the cooresponding first driven at low speed motor 1 respectively with second self-acting clutch 4, and wherein the radical function of first self-acting clutch 3 is to break off or engage the power transmission between the first driven at low speed motor 1 and the power coupler 5 according to the control command of entire car controller 14; Second self-acting clutch, 4 radical functions are to break off or engage the power transmission between the second high-speed driving motor 2 and the power coupler 5 according to the control command of entire car controller 14;
Power coupler 5 is arranged between two self-acting clutchs and the diff; Its radical function is with the power that the first driven at low speed motor 1 and the second high-speed driving motor 2 are exported the separately back output that is coupled; This power coupler 5 is made up of 2 cover autoshift actuating unit AMT of the gear with four different drive ratios; 8 kinds of coupled modes can be provided according to the different gear stages of these two two grades of AMT, and each AMT is equipped with neutral gear, like this can be according to the different situations of vehicle operating; Carry out different gear combinations so that different takeoff outputs to be provided, satisfy the dynamic property and the economical demand of vehicle.
The radical function of diff 6 is that the takeoff output with power coupler 5 slows down and increases the operation of square; This diff 6 is connected with the drive wheel 7 of both sides;
The radical function of operator's compartment display system 15 is the status informations that show each parts in the double-motor coupling drive system in real time.
Through adopting above double-motor coupling drive system, can realize the control method of following integrated driving system, especially can be according to the speed of a motor vehicle and threshold value V1, V2, V3 (wherein V1 V2 V3) relatively carry out the control of different gear:
A, at first; The information that entire car controller 14 collects according to vehicle sensors judges whether the work of each parts of car load is normal; If each parts all are in normal working, entire car controller 14 will be according to the driving intention of chaufeur and vehicle parameter to each parts transmitting control commands;
When carrying out gear-change operation; When first and second self-acting clutchs, 3,4 mode of operations just often; When reaching shift point at every turn; Separate earlier, control then that corresponding AMT carries out gear shift in the power coupler, control corresponding self-acting clutch at last again and engage by the corresponding self-acting clutch of entire car controller 14 controls;
B, when first and second self-acting clutchs, 3,4 mode of operations just often; And the speed of a motor vehicle is greater than 0 during less than V1; AMT1 in the entire car controller 14 control power couplers 5 is in 1 P PARK Position P; AMT2 is in 1 P PARK Position P, controls the first driven at low speed motor 1 then and the second high-speed driving motor 2 moves simultaneously, to provide vehicle launch needed moment of torsion;
C, when first and second self-acting clutchs, 3,4 mode of operations just often; And when vehicle speed more than or equal to V1 during less than V2; AMT1 in the entire car controller 14 control power couplers 5 is in 2 P PARK Position Ps; AMT2 is in 1 P PARK Position P, controls the first driven at low speed motor 1 then and the second high-speed driving motor 2 moves simultaneously, with the moment of torsion that provides vehicle to need when the low cruise;
D, when first and second self-acting clutchs, 3,4 mode of operations just often; And when vehicle speed more than or equal to V2 during less than V3; AMT1 in the entire car controller 14 control power couplers 5 is in 2 P PARK Position Ps; AMT2 is in 2 P PARK Position Ps, controls the first driven at low speed motor 1 then and the second high-speed driving motor 2 moves simultaneously, with the moment of torsion that provides vehicle when middling speed is moved, to need;
E, when first and second self-acting clutchs, 3,4 mode of operations just often; And when vehicle speed during more than or equal to V3; AMT1 in the entire car controller 14 control power couplers 5 is in Neutral Position, and AMT2 is in 2 P PARK Position Ps, and the first driven at low speed motor 1 is shut down; The operation of the second high-speed driving motor 2, the moment of torsion of demand so that the vehicle high-speed cruising to be provided;
F, when first and second self-acting clutchs, 3,4 mode of operations just often; When but there was fault in AMT1, the AMT1 in the entire car controller 14 control power couplers 5 was in Neutral Position or manually AMT1 is picked neutral gear, and the first driven at low speed motor 1 is shut down; 2 operations of the second high-speed driving motor; When the speed of a motor vehicle makes AMT2 be in 1 P PARK Position P greater than 0 during less than V2, when the speed of a motor vehicle makes AMT2 be in 2 P PARK Position Ps during more than or equal to V2, the moment of torsion of demand so that vehicle operating to be provided;
G, when first and second self-acting clutchs, 3,4 mode of operations just often; When but there was fault in AMT2, the AMT2 in the entire car controller 14 control power couplers 5 was in Neutral Position or manually AMT2 is picked neutral gear, and the second high-speed driving motor 2 is shut down; 1 operation of the first driven at low speed motor; When the speed of a motor vehicle makes AMT1 be in 1 P PARK Position P greater than 0 during less than V1, when the speed of a motor vehicle makes AMT1 be in 2 P PARK Position Ps during more than or equal to V1, the moment of torsion of demand so that vehicle operating to be provided;
H, when first and second self-acting clutchs, 3,4 mode of operations just often; When but there is fault in the first driven at low speed motor 1; AMT1 in the entire car controller 14 control power couplers 5 is in Neutral Position, makes 2 operations of the second high-speed driving motor then, when the speed of a motor vehicle makes AMT2 be in 1 P PARK Position P greater than 0 during less than V2; When the speed of a motor vehicle makes AMT2 be in 2 P PARK Position Ps during more than or equal to V2, the moment of torsion of demand so that vehicle operating to be provided;
I, when first and second self-acting clutchs, 3,4 mode of operations just often; When but there is fault in the second high-speed driving motor 2; AMT2 in the entire car controller 14 control power couplers 5 is in Neutral Position, makes 1 operation of the first driven at low speed motor then, when the speed of a motor vehicle makes AMT1 be in 1 P PARK Position P greater than 0 during less than V1; When the speed of a motor vehicle makes AMT1 be in 2 P PARK Position Ps during more than or equal to V1, the moment of torsion of demand so that vehicle operating to be provided;
J, when first self-acting clutch 3 breaks down and can not break off; When AMT1 carries out gear-change operation; Second self-acting clutch 4 is separated; AMT1 carries out the gear shift action then, and second self-acting clutch 4 was rejoined after gear shift was accomplished, and was coupled as new gear by AMT1 and AMT2 and carried out takeoff output;
K, when second self-acting clutch 4 breaks down and can not break off; When AMT2 carries out gear-change operation; First self-acting clutch 3 is separated; AMT2 carries out the gear shift action then, and first self-acting clutch 3 was rejoined after gear shift was accomplished, and was coupled as new gear by AMT1 and AMT2 and carried out takeoff output;
L, when first self-acting clutch 3 and second self-acting clutch 4 break down simultaneously, make that among the AMT1 and AMT2 is in Neutral Position in the power coupler 5, another carries out gear shift according to shift control strategy.
The present invention is for solving the problems of the technologies described above improvements over the prior art, and it is made up of the recombination of prior art.Those skilled in the art are not difficult to find out, this new combination long-term theoretical analysis and a large amount of experimental results of contriver that condensed, therefore; On the basis of existing technology; In order to solve the problems of the technologies described above, do not pay a large amount of creative works and can't obtain technique scheme of the present invention, yet; After having read this specification sheets, those skilled in the art should realize each practical implementation form of the present invention.
Claims (10)
1. the control method of the integrated driving system of double-motor pure electric automobile; Wherein this driving system comprises entire car controller (14), first electric machine controller (9), second electric machine controller (10), the first driven at low speed motor (1), the second high-speed driving motor (2), first self-acting clutch (3) and second self-acting clutch (4) and the power coupler (5) that are connected with the second high-speed driving motor (2) with the first driven at low speed motor (1) respectively; Wherein power coupler (5) is made up of two cover autoshift actuating unit AMT of the gear with four different drive ratios; The control method of this driving system is: the information that entire car controller (14) collects according to vehicle sensors judges whether the work of each parts of car load is normal; If each parts all are in normal working; Will be according to the driving intention of chaufeur and vehicle parameter to each parts transmitting control commands; And according to the speed of a motor vehicle and threshold value V1, the different gear of relatively implementing of V2 and V3 is controlled, wherein V1 < V2 < V3; It is characterized in that: mode of operation just often when first and second self-acting clutchs (3,4); And the speed of a motor vehicle is greater than 0 during less than V1; AMT1 in entire car controller (14) the control power coupler (5) is in 1 P PARK Position P; AMT2 is in 1 P PARK Position P, controls the first driven at low speed motor (1) then and the second high-speed driving motor (2) moves simultaneously, to provide vehicle launch needed moment of torsion.
2. control method according to claim 1; It is characterized in that when first and second self-acting clutchs (3,4) mode of operation just often, and when vehicle speed more than or equal to V1 during less than V2; AMT1 in entire car controller (14) the control power coupler (5) is in 2 P PARK Position Ps; AMT2 is in 1 P PARK Position P, controls the first driven at low speed motor (1) then and the second high-speed driving motor (2) moves simultaneously, with the moment of torsion that provides vehicle to need when the low cruise.
3. control method according to claim 2; It is characterized in that when first and second self-acting clutchs (3,4) mode of operation just often, and when vehicle speed more than or equal to V2 during less than V3; AMT1 in entire car controller (14) the control power coupler (5) is in 2 P PARK Position Ps; AMT2 is in 2 P PARK Position Ps, controls the first driven at low speed motor (1) then and the second high-speed driving motor (2) moves simultaneously, with the moment of torsion that provides vehicle when middling speed is moved, to need.
4. control method according to claim 3 is characterized in that working as first and second self-acting clutchs (3,4) mode of operation just often; And when vehicle speed during more than or equal to V3; AMT1 in entire car controller (14) the control power coupler (5) is in Neutral Position, and AMT2 is in 2 P PARK Position Ps, and the first driven at low speed motor (1) is shut down; The second high-speed driving motor (2) operation, the moment of torsion that needs so that the vehicle high-speed cruising to be provided.
5. control method according to claim 1; It is characterized in that when first and second self-acting clutchs (3,4) mode of operation just often, but when there is fault in AMT1; AMT1 in entire car controller (14) the control power coupler (5) is in Neutral Position or manually AMT1 is picked neutral gear; The first driven at low speed motor (1) is shut down, and the operation of the second high-speed driving motor (2) is when the speed of a motor vehicle makes AMT2 be in 1 P PARK Position P greater than 0 during less than V2; When the speed of a motor vehicle makes AMT2 be in 2 P PARK Position Ps during more than or equal to V2, the moment of torsion of demand so that vehicle operating to be provided.
6. according to each described control method among the claim 1-5; It is characterized in that when first and second self-acting clutchs (3,4) mode of operation just often, but when there is fault in AMT2; AMT2 in entire car controller (14) the control power coupler (5) is in Neutral Position or manually AMT2 is picked neutral gear; The second high-speed driving motor (2) is shut down, and the operation of the first driven at low speed motor (1) is when the speed of a motor vehicle makes AMT1 be in 1 P PARK Position P greater than 0 during less than V1; When the speed of a motor vehicle makes AMT1 be in 2 P PARK Position Ps during more than or equal to V1, the moment of torsion of demand so that vehicle operating to be provided.
7. control method according to claim 1 is characterized in that working as first and second self-acting clutchs (3,4) mode of operation just often; But the first driven at low speed motor (1) is when existing fault; AMT1 in entire car controller (14) the control power coupler (5) is in Neutral Position, makes the operation of the second high-speed driving motor (2) then, when the speed of a motor vehicle makes AMT2 be in 1 P PARK Position P greater than 0 during less than V2; When the speed of a motor vehicle makes AMT2 be in 2 P PARK Position Ps during more than or equal to V2, the moment of torsion of demand so that vehicle operating to be provided.
8. according to each described control method in claim 1-5 and 7; It is characterized in that when first and second self-acting clutchs (3; 4) mode of operation just often, but the second high-speed driving motor (2) is when existing fault, the AMT2 in entire car controller (14) the control power coupler (5) is in Neutral Position; Make the operation of the first driven at low speed motor (1) then; When the speed of a motor vehicle makes AMT1 be in 1 P PARK Position P greater than 0 during less than V1, when the speed of a motor vehicle makes AMT1 be in 2 P PARK Position Ps during more than or equal to V1, the moment of torsion of demand so that vehicle operating to be provided.
9. control method according to claim 1; It is characterized in that when first self-acting clutch (3) breaks down and can not break off; When AMT1 carries out gear-change operation, second self-acting clutch (4) is separated, AMT1 carries out the gear shift action then; Second self-acting clutch (4) was rejoined after gear shift was accomplished, and was coupled as new gear by AMT1 and AMT2 and carried out takeoff output.
10. according to each described control method among the claim 1-5,7 and 9; It is characterized in that when second self-acting clutch (4) breaks down and can not break off; When AMT2 carries out gear-change operation, first self-acting clutch (3) is separated, AMT2 carries out the gear shift action then; First self-acting clutch (3) was rejoined after gear shift was accomplished, and was coupled as new gear by AMT1 and AMT2 and carried out takeoff output.
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| CN103552477A (en) * | 2013-10-10 | 2014-02-05 | 安徽工程大学 | Electromobile double-motor driving system |
| CN103895524A (en) * | 2012-12-27 | 2014-07-02 | 比亚迪股份有限公司 | Driving system of electric motor coach and driving control method thereof |
| CN104139691A (en) * | 2014-07-21 | 2014-11-12 | 中通客车控股股份有限公司 | Dual-motor coupling driving system of new energy automobile and control method |
| CN104709112A (en) * | 2015-03-24 | 2015-06-17 | 上海中科深江电动车辆有限公司 | Pure electric vehicle driving system and performance optimizing method |
| CN105291887A (en) * | 2015-11-20 | 2016-02-03 | 南车株洲电力机车研究所有限公司 | Double-motor torque distribution control method for rubber wheel low-floor intelligent rail train |
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| CN105313880B (en) * | 2014-08-05 | 2020-08-11 | 罗伯特·博世有限公司 | Motor vehicle with at least two drive actuators and increased fail safety |
| CN104709112A (en) * | 2015-03-24 | 2015-06-17 | 上海中科深江电动车辆有限公司 | Pure electric vehicle driving system and performance optimizing method |
| CN105291887A (en) * | 2015-11-20 | 2016-02-03 | 南车株洲电力机车研究所有限公司 | Double-motor torque distribution control method for rubber wheel low-floor intelligent rail train |
| CN105291887B (en) * | 2015-11-20 | 2018-03-09 | 南车株洲电力机车研究所有限公司 | The bi-motor moment of torsion distribution control method of rubber tire low-floor intelligent track train |
| CN107284212A (en) * | 2016-04-13 | 2017-10-24 | 江苏陆地方舟新能源电动汽车有限公司 | A kind of power assembly of electric automobile and its control method |
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| CN102358282B (en) | 2013-09-11 |
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Inventor after: Lin Cheng Inventor after: Sun Fengchun Inventor after: Zhou Hui Inventor before: Lin Cheng Inventor before: Sun Pengchun Inventor before: Zhou Hui |