CN107499181A - A kind of four-wheel driving electric vehicle start-up and shut-down control method and system - Google Patents
A kind of four-wheel driving electric vehicle start-up and shut-down control method and system Download PDFInfo
- Publication number
- CN107499181A CN107499181A CN201710671690.7A CN201710671690A CN107499181A CN 107499181 A CN107499181 A CN 107499181A CN 201710671690 A CN201710671690 A CN 201710671690A CN 107499181 A CN107499181 A CN 107499181A
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- China
- Prior art keywords
- hub clutch
- wheel hub
- wheel
- driver element
- output signal
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2054—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed by controlling transmissions or clutches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2220/00—Electrical machine types; Structures or applications thereof
- B60L2220/40—Electrical machine applications
- B60L2220/42—Electrical machine applications with use of more than one motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2260/00—Operating Modes
- B60L2260/20—Drive modes; Transition between modes
- B60L2260/28—Four wheel or all wheel drive
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention discloses a kind of four-wheel driving electric vehicle start-up and shut-down control method and system, methods described, which refers to, confirms that electric automobile is in movable state, determination mode motor is instructed according to electrokinetic cell SOC value and for Driving control, entire car controller controls the disengagement and engagement of front and back wheel hub clutch by the mode motor of determination, controls driver element to work by mode motor and user's driving condition；The system includes entire car controller, hub clutch, driver element and signal gathering unit；The instruction that the entire car controller is sent according to signal gathering unit controls hub clutch and driver element, whether the hub clutch control wheel engages with driver element power transmission shaft, and the driver element instructs according to entire car controller drives power transmission shaft to be rotated；In the case of drive propulsion abundance, the useless energy for rotating consumption is reduced, and then improve electric automobile energy effective rate of utilization.
Description
Technical field
The present invention relates to electric automobile field, more particularly, to a kind of four-wheel driving electric vehicle start-up and shut-down control method
And system.
Background technology
With the increasingly prosperity of Modern Traffic, automobile has become the important selection of people's trip, and because of the tail gas of automobile
Discharge and influence the problem of air and living environment are into another urgent need to resolve；In response to the call of energy-saving and emission-reduction, in recent years
The electrokinetic cell of repeatable charging is used to replace electric automobile of the fuel oil as energy source of car to have risen；The appearance of electric automobile
A method for solving motor vehicle exhaust emission and direction, but existing electric automobile are largely provided, is continued to use substantially
The power drive system of conventional vehicle, i.e., no matter vehicle is in which kind of transport condition, each drivetrain components (such as semiaxis, differential
Device, main reducing gear, axle and gear and rotor) all rotating, converted electrical energy into electric automobile for vehicle wheel rotation
Mechanical energy when, the rotation of some parts of the power drive system consumes part energy, and these energy are not final
Be converted to the mechanical energy for vehicle wheel rotation, in order to improve the effective rate of utilization of energy, need to traditional power drive system with
And corresponding drive control method is improved.
The content of the invention
In order to solve the problems, such as that existing electric automobile energy effective rate of utilization is low existing for background technology, the invention provides
A kind of four-wheel driving electric vehicle start-up and shut-down control method and system, methods described and system are according to to electric automobile starting mode
And whether the judgement of car-parking model, the engagement and corresponding driver element for controlling hub clutch work, ensureing that power is sufficient
On the premise of reduce energy loss.
A kind of four-wheel electric automobile motorboat control method includes：
Step 1, confirm that electric automobile is in movable state；The confirmation electric automobile, which is in movable state, to be included really
Recognize that high voltage connector is in closure state, electrokinetic cell is in uncharged state and parking braking is in releasing state；
Step 2, mode motor is determined according to electrokinetic cell SOC value and the instruction of user's Driving control, the pattern includes warp
Ji starting mode, motion starting mode and parking toll pattern；User's Driving control instruction includes brake pedal output
Signal, accelerator pedal output signal and gear shifting device output signal；
Step 3, entire car controller controls the disengagement and engagement of front and back wheel hub clutch by the mode motor of determination；
Step 4, entire car controller is worked by mode motor and user's Driving control instruction control driver element；
Further, when selecting economic starting mode, need to meet the electrokinetic cell SOC value SOC first thresholds with
Upper, brake pedal output signal 0V, gear shifting device output signal are that accelerator pedal output signal is less than the first threshold of acceleration to D shelves simultaneously
Value；During selection motion starting mode, it need to meet the electrokinetic cell SOC value more than SOC Second Thresholds, brake pedal output letter
Number 0V, gear shifting device output signal are that accelerator pedal output signal is more than and accelerates Second Threshold S shelves simultaneously；Select parking toll pattern
When, when need to meet that brake pedal output signal is more than braking Second Threshold, accelerator pedal output signal is 0V；
Further, when mode motor is economic starting mode, the engagement of vehicle control unit controls trailing wheel hub clutch,
Front-wheel hub clutch disengages；When mode motor is moves starting mode or parking toll pattern, before vehicle control unit controls
Trailing wheel hub clutch engages；When mode motor is parking toll pattern, vehicle control unit controls front and back wheel wheel side clutch
Device engage, when brake pedal output signal be less than braking first threshold when, entire car controller by control driver element brake into
Row ramp to stop simultaneously carries out braking energy feedback, when vapour brake pedal output signal is more than braking Second Threshold, full-vehicle control
Device is by controlling driver element braking and vehicle mechanical brake progress ramp to stop and carrying out braking energy feedback；
Further, the driver element includes front wheel drive unit and rear wheel drive device, when entire car controller control
When trailing wheel hub clutch processed engagement, front-wheel hub clutch separate, front vehicle wheel rotates, front wheel drive unit not work
Make；When vehicle control unit controls front and back wheel hub clutch engages, vehicle is in four-wheel drive state；
Further, the front-wheel hub clutch includes the near front wheel hub clutch and off-front wheel hub clutch, whole
The control instruction that vehicle controller is sent to the near front wheel hub clutch and off-front wheel hub clutch is identical；The rear wheel rotation
Side clutch includes left rear wheel hub clutch and off hind wheel hub clutch, entire car controller to left rear wheel hub clutch and
The control instruction that off hind wheel hub clutch is sent is identical；
A kind of four-wheel driving electric vehicle inflator control system includes：
Entire car controller, each command signal of the entire car controller reception signal collecting unit collection, believes each instruction
Number judged, and control instruction is sent to hub clutch and driver element；
Hub clutch, the hub clutch includes front-wheel hub clutch and trailing wheel hub clutch, for controlling
Whether wheel processed engages with driver element power transmission shaft, and when the hub clutch engages, wheel and driver element power transmission shaft are coaxial
Rotate；
Driver element, the driver element includes front wheel drive unit and rear wheel drive device, for according to vehicle control
Device order-driven motor driven power transmission shaft processed is rotated；For producing feedback energy in braking；
Signal gathering unit, signal gathering unit collection electrokinetic cell SOC value, user's Driving control command signal,
High voltage connector folding condition signal, power battery charging status signal, gear shifting device output signal and parking braking state letter
Number, user's Driving control instruction includes brake pedal output signal, accelerator pedal output signal.
Further, the driver element includes electric machine controller, motor, automatic transmission and power transmission shaft；Institute
The control signal that electric machine controller receives complete machine controller is stated, controls motor and automatic transmission to drive drive axis；
When hub clutch engages, power transmission shaft drives vehicle wheel rotation；
Further, the front-wheel hub clutch includes the near front wheel hub clutch and off-front wheel hub clutch, whole
The control instruction that vehicle controller is sent to the near front wheel hub clutch and off-front wheel hub clutch is identical；The rear wheel rotation
Side clutch includes left rear wheel hub clutch and off hind wheel hub clutch, entire car controller to left rear wheel hub clutch and
The control instruction that off hind wheel hub clutch is sent is identical；
Further, when the engagement of vehicle control unit controls trailing wheel hub clutch, front-wheel hub clutch separate, front-wheel
Driver element other parts in addition to wheel do not rotate；When vehicle control unit controls front and back wheel hub clutch engages
When, vehicle is in four-wheel drive state.
Beneficial effects of the present invention are：Technical scheme, give a kind of four-wheel driving electric vehicle start and stop control
Method and system processed, methods described and system according to judge vehicle launch pattern and car-parking model control hub clutch whether connect
The working condition of driver element is closed and corresponded to, the driving to driver element is optimized according to user's Driving control signal, reduce nothing
Meaning driving, the useless energy for rotating consumption is reduced, and then improve electric automobile energy effective rate of utilization.
Brief description of the drawings
By reference to the following drawings, the illustrative embodiments of the present invention can be more fully understood by：
Fig. 1 is a kind of flow chart of four-wheel driving electric vehicle start-up and shut-down control method of the specific embodiment of the invention；
Fig. 2 is a kind of structure chart of four-wheel driving electric vehicle start-up and shut-down control method of the specific embodiment of the invention；
Fig. 3 is a kind of vehicle electric system structure chart for carrying out start-up and shut-down control of the specific embodiment of the invention.
Embodiment
The illustrative embodiments of the present invention are introduced with reference now to accompanying drawing, however, the present invention can use many different shapes
Formula is implemented, and is not limited to embodiment described herein, there is provided these embodiments are to disclose at large and fully
The present invention, and fully pass on the scope of the present invention to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements are attached using identical
Icon is remembered.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has to person of ordinary skill in the field
It is common to understand implication.Further it will be understood that the term limited with usually used dictionary, be appreciated that and its
The linguistic context of association area has consistent implication, and is not construed as Utopian or overly formal meaning.
Fig. 1 is a kind of flow chart of four-wheel driving electric vehicle start-up and shut-down control method of the specific embodiment of the invention；Root
According to the method and step shown in the flow chart, driver element and wheel according to mode motor and user's driving situation to electric automobile
Side clutch is controlled, and the service condition of driver element is changed in the case of power abundance, reduces energy loss, the side
Method includes：
Step 101, confirm that electric automobile is in movable state；The confirmation electric automobile, which is in movable state, to be included
Confirm that high voltage connector is in closure state, electrokinetic cell is in uncharged state and parking braking is in releasing state；This
When automobile can be carried out starting to walk startup or to be kept in motion by dead ship condition；
Step 102, mode motor is determined according to electrokinetic cell SOC value and the instruction of user's Driving control, the pattern includes
Economic starting mode, motion starting mode and parking toll pattern；It is defeated that user's Driving control instruction includes brake pedal
Go out signal, accelerator pedal output signal and gear shifting device output signal；
When selecting economic starting mode, it need to meet the electrokinetic cell SOC value more than SOC first thresholds, brake pedal
Output signal 0V, gear shifting device output signal are that accelerator pedal output signal is less than acceleration first threshold to D shelves simultaneously；Selection is moved
During step mode, it need to meet the electrokinetic cell SOC values more than SOC Second Thresholds, brake pedal output signal 0V, gear shifting device
Output signal is that accelerator pedal output signal is more than acceleration Second Threshold to S shelves simultaneously；When selecting parking toll pattern, it need to meet to make
When dynamic pedal output signal is more than braking Second Threshold, accelerator pedal output signal is 0V；
Further, the power SOC value is gathered by electrokinetic cell, brake pedal output signal is gathered by brake pedal,
Accelerator pedal output signal is gathered by accelerator pedal, gear shifting device output signal is gathered by gear shifting device, and above-mentioned each signal is by vehicle control
Device processed uniformly receives and handled；
In the present embodiment, SOC first thresholds are that 20%, SOC Second Thresholds are 40%；Acceleration first threshold is 3V, is added
Fast Second Threshold is 4V；Braking first threshold is 3V, and braking Second Threshold is 3V；
Step 103, entire car controller controls the disengagement and engagement of front and back wheel hub clutch by the mode motor of determination；
Further, when mode motor is economic starting mode, the engagement of vehicle control unit controls trailing wheel hub clutch,
Front-wheel hub clutch disengages；When mode motor is moves starting mode or parking toll pattern, before vehicle control unit controls
Trailing wheel hub clutch engages；When mode motor is parking toll pattern, vehicle control unit controls front and back wheel wheel side clutch
Device engages；
Step 104, entire car controller is worked by mode motor and user's Driving control instruction control driver element；
The driver element includes front wheel drive unit and rear wheel drive device, when vehicle control unit controls rear wheel rotation side
When clutch engagement, front-wheel hub clutch separate, front vehicle wheel rotates, and front wheel drive unit does not work；When vehicle control
When device control front and back wheel hub clutch processed engages, vehicle is in four-wheel drive state；
Further, when mode motor is parking toll pattern, vehicle control unit controls front and back wheel hub clutch connects
Close, when brake pedal output signal is less than braking first threshold, entire car controller is by controlling driver element braking to be subtracted
Speed is stopped and carries out braking energy feedback, and when vapour brake pedal output signal is more than braking Second Threshold, entire car controller leads to
Cross the braking of control driver element and vehicle mechanical brake carries out ramp to stop and carries out braking energy feedback；
Further, the front-wheel hub clutch includes the near front wheel hub clutch and off-front wheel hub clutch, whole
The control instruction that vehicle controller is sent to the near front wheel hub clutch and off-front wheel hub clutch is identical；The rear wheel rotation
Side clutch includes left rear wheel hub clutch and off hind wheel hub clutch, entire car controller to left rear wheel hub clutch and
The control instruction that off hind wheel hub clutch is sent is identical；
A kind of four-wheel driving electric vehicle inflator control system includes：
Entire car controller 201, each command signal of the reception signal collecting unit of entire car controller 201 collection, to each
Command signal is judged, and sends control instruction to hub clutch 202 and driver element 203；
Hub clutch 202, the hub clutch 202 include front-wheel hub clutch and trailing wheel hub clutch,
For controlling whether wheel engages with driver element power transmission shaft, when the hub clutch 202 engages, wheel and driver element
Power transmission shaft rotates coaxially；
Driver element 203, the driver element 203 includes front wheel drive unit and rear wheel drive device, for basis
Entire car controller order-driven motor driven power transmission shaft is rotated；For producing feedback energy in braking；
Signal gathering unit 204, the signal gathering unit 204 gather electrokinetic cell SOC value, the instruction of user's Driving control
Signal, high voltage connector folding condition signal, power battery charging status signal, gear shifting device output signal and parking braking shape
State signal, user's Driving control instruction include brake pedal output signal, accelerator pedal output signal.
Further, the driver element 203 includes electric machine controller, motor, automatic transmission and power transmission shaft；
The electric machine controller receives the control signal of complete machine controller, controls motor and automatic transmission to drive power transmission shaft to turn
It is dynamic；When hub clutch engages, power transmission shaft drives vehicle wheel rotation；
Further, the front-wheel hub clutch includes the near front wheel hub clutch and off-front wheel hub clutch, whole
The control instruction that vehicle controller is sent to the near front wheel hub clutch and off-front wheel hub clutch is identical；The rear wheel rotation
Side clutch includes left rear wheel hub clutch and off hind wheel hub clutch, entire car controller to left rear wheel hub clutch and
The control instruction that off hind wheel hub clutch is sent is identical；
Further, when entire car controller 201 controls the engagement of trailing wheel hub clutch, front-wheel hub clutch to separate,
Front wheel drive unit other parts in addition to wheel do not rotate；When vehicle control unit controls front and back wheel hub clutch connects
During conjunction, vehicle is in four-wheel drive state.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (9)
1. a kind of four-wheel driving electric vehicle start-up and shut-down control method, methods described include：
Step 1, confirm that electric automobile is in movable state；The confirmation electric automobile is in movable state and includes validating that height
Tentaculum is in closure state, electrokinetic cell is in uncharged state and parking braking is in releasing state for crimping；
Step 2, mode motor is determined according to electrokinetic cell SOC value and the instruction of user's Driving control, the pattern includes economic rise
Step mode, motion starting mode and parking toll pattern；User's Driving control instruction include brake pedal output signal,
Accelerator pedal output signal and gear shifting device output signal；
Step 3, entire car controller controls the disengagement and engagement of front and back wheel hub clutch by the mode motor of determination；
Step 4, entire car controller is worked by mode motor and user's Driving control instruction control driver element.
2. according to the method for claim 1, it is characterised in that：When selecting economic starting mode, the power electric need to be met
Pond SOC value is more than SOC first thresholds, brake pedal output signal 0V, gear shifting device output signal are that accelerator pedal is defeated simultaneously for D shelves
Go out signal and be less than acceleration first threshold；During selection motion starting mode, the electrokinetic cell SOC value need to be met in the thresholds of SOC second
It is worth the above, brake pedal output signal 0V, gear shifting device output signal are that accelerator pedal output signal is more than acceleration second to S shelves simultaneously
Threshold value；When selecting parking toll pattern, when need to meet that brake pedal output signal is more than braking Second Threshold, accelerator pedal output
Signal is 0V.
3. according to the method for claim 1, it is characterised in that：When mode motor is economic starting mode, full-vehicle control
The engagement of device control trailing wheel hub clutch, front-wheel hub clutch disengage；When mode motor is motion starting mode or parking control
During molding formula, vehicle control unit controls front and back wheel hub clutch engages；When mode motor is parking toll pattern, vehicle
Controller control front and back wheel hub clutch engagement, when brake pedal output signal is less than braking first threshold, full-vehicle control
Device is by controlling driver element braking to carry out ramp to stop and carrying out braking energy feedback, when vapour brake pedal output signal is more than
When braking Second Threshold, entire car controller by controlling, brake and vehicle mechanical brake carries out ramp to stop simultaneously by driver element
Carry out braking energy feedback.
4. according to the method for claim 1, it is characterised in that：The driver element includes front wheel drive unit and trailing wheel
Driver element, when the engagement of vehicle control unit controls trailing wheel hub clutch, front-wheel hub clutch separate, front vehicle wheel, which is done, to be rotated
Motion, front wheel drive unit do not work；When vehicle control unit controls front and back wheel hub clutch engages, vehicle is in four-wheel
Driving condition.
5. according to the method for claim 1, it is characterised in that：The front-wheel hub clutch includes the side clutch of the near front wheel wheel
Device and off-front wheel hub clutch, the control that entire car controller is sent to the near front wheel hub clutch and off-front wheel hub clutch
Instruction is identical；Rear wheel rotation side clutch includes left rear wheel hub clutch and off hind wheel hub clutch, vehicle control
The control instruction that device processed is sent to left rear wheel hub clutch and off hind wheel hub clutch is identical.
6. a kind of system for realizing claim 1 methods described, the system includes：
Entire car controller, each command signal of the entire car controller reception signal collecting unit collection, enters to each command signal
Row judges, and sends control instruction to hub clutch and driver element；
Hub clutch, the hub clutch includes front-wheel hub clutch and trailing wheel hub clutch, for controlling car
Whether wheel engages with driver element power transmission shaft, and when the hub clutch engages, wheel rotates coaxially with driver element power transmission shaft；
Driver element, the driver element includes front wheel drive unit and rear wheel drive device, for according to entire car controller
Order-driven motor driven power transmission shaft is rotated；For producing feedback energy in braking；
Signal gathering unit, the signal gathering unit collection electrokinetic cell SOC value, user's Driving control command signal, high pressure
Contactor folding condition signal, power battery charging status signal, gear shifting device output signal and parking braking status signal, institute
Stating the instruction of user's Driving control includes brake pedal output signal, accelerator pedal output signal.
7. system according to claim 6, it is characterised in that：The driver element include electric machine controller, motor,
Automatic transmission and power transmission shaft；The electric machine controller receives the control signal of complete machine controller, control motor and from
Dynamic speed changer drives drive axis；When hub clutch engages, power transmission shaft drives vehicle wheel rotation.
8. system according to claim 6, it is characterised in that：The front-wheel hub clutch includes the side clutch of the near front wheel wheel
Device and off-front wheel hub clutch, the control that entire car controller is sent to the near front wheel hub clutch and off-front wheel hub clutch
Instruction is identical；Rear wheel rotation side clutch includes left rear wheel hub clutch and off hind wheel hub clutch, vehicle control
The control instruction that device processed is sent to left rear wheel hub clutch and off hind wheel hub clutch is identical.
9. system according to claim 6, it is characterised in that：When vehicle control unit controls trailing wheel hub clutch engage,
When front-wheel hub clutch separates, front wheel drive unit other parts in addition to wheel do not rotate；When entire car controller control
When front and back wheel hub clutch processed engages, vehicle is in four-wheel drive state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710671690.7A CN107499181A (en) | 2017-08-08 | 2017-08-08 | A kind of four-wheel driving electric vehicle start-up and shut-down control method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710671690.7A CN107499181A (en) | 2017-08-08 | 2017-08-08 | A kind of four-wheel driving electric vehicle start-up and shut-down control method and system |
Publications (1)
| Publication Number | Publication Date |
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| CN107499181A true CN107499181A (en) | 2017-12-22 |
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| CN201710671690.7A Pending CN107499181A (en) | 2017-08-08 | 2017-08-08 | A kind of four-wheel driving electric vehicle start-up and shut-down control method and system |
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| CN114212091A (en) * | 2021-12-30 | 2022-03-22 | 重庆长安新能源汽车科技有限公司 | Control method for power transmission device of electric automobile, vehicle and computer readable storage medium |
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Application publication date: 20171222 |
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