CN101323302B - Non-clutch shift control method and control system of pure electric vehicle - Google Patents
Non-clutch shift control method and control system of pure electric vehicle Download PDFInfo
- Publication number
- CN101323302B CN101323302B CN2008101257934A CN200810125793A CN101323302B CN 101323302 B CN101323302 B CN 101323302B CN 2008101257934 A CN2008101257934 A CN 2008101257934A CN 200810125793 A CN200810125793 A CN 200810125793A CN 101323302 B CN101323302 B CN 101323302B
- Authority
- CN
- China
- Prior art keywords
- speed
- motor
- drive motor
- gear
- shift
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a shift controlling method for a purely electric vehicle, and the method includes: a. the position of an accelerator pedal and the speed are detected; b. when the position of the accelerator pedal and the speed arrive at a shifting point, the rotate speed of a drive motor is regulated to an expected rotate speed and the position is selected while regulating the speed; c. after reaching the expected rotate speed, shift is carried out. The invention also provides a shift controlling system for a purely electric vehicle, and the system comprises: a pedal position detectingunit, a central controlling unit, a motor speed regulating unit, a position selecting device and a shifting device. The shift controlling method and system for purely electric vehicles can shift under the condition that the speed is not reduced, thus greatly improving the maneuverability of the vehicles and fully playing the efficiency of the electric motor.
Description
Technical field
The present invention relates to elec. vehicle control field, relate in particular to a kind of non-clutch shift control method and control system of pure electric vehicle.
Background technology
In the prior art, pure electric vehicle adopts the second gear mechanical transmission more, do not having under the situation of power-transfer clutch, the shift control of mechanical transmission need be finished when vehicle speed is lower, that is, when the needs gear shift, at first reduce the rotating speed of output shaft, the speed of a motor vehicle is reduced, and then pluck operations such as shelves, speed change.
As can be seen, the prior art ground gear shift that can not realize not slowing down in the elec. vehicle traveling process, this can bring very big influence to maneuvering performance of vehicle.
Summary of the invention
At the defective of prior art, the present invention proposes a kind of gear-shifting control method and control system, can realize gear-change operation in pure electric vehicle travels.
The invention provides a kind of pure electric vehicle gear-shifting control method, this method comprises: a. detects Das Gaspedal and speed of a motor vehicle position; B. when accelerator pedal position and the speed of a motor vehicle arrive shift point, the drive motor speed adjustment to rotating speed of target, and is carried out bit selecting in speed governing; C. after being adjusted to rotating speed of target, carry out gear-change operation.
Preferably, step b comprises: when b1. arrives shift point when accelerator pedal position and the speed of a motor vehicle, the output torque of drive motor is reduced to predetermined value; B2. pluck the neutral gear operation; B3. the drive motor rotating speed is transferred to rotating speed of target, and in speed governing, carry out bit selecting.
More preferably, step b1 comprises: b11. sends moment of torsion gradual change request to drive motor controller; B12. after drive motor controller receives request signal, the output torque of drive motor is reduced to predetermined value.
Preferably, step c comprises: c1. sends moment of torsion gradual change request to drive motor controller; C2. after drive motor controller receives request signal, the output torque of drive motor is reduced to predetermined value; C3. carry out gear-change operation.
Preferably, this method also comprises: d. is after finishing gear-change operation, and drive motor recovers moment of torsion output.
The present invention also provides a kind of pure electric vehicle shift control, and this system comprises: the pedal position detecting unit is used to detect accelerator pedal position; Speed of a motor vehicle detecting unit is used to detect the vehicle current vehicle speed; Central Processing Unit (CPU) is connected with the pedal position detecting unit, regulates rotating speed of motor according to accelerator pedal position and judges whether that needs carry out gear-change operation; The electric machine speed regulation unit is regulated the output speed of drive motor according to the instruction that Central Processing Unit (CPU) sends; The bit selecting device, bit selecting is carried out in the instruction that sends according to Central Processing Unit (CPU) in speed governing; Gearshift is used for carrying out gear-change operation after transferring to rotating speed of target.
Preferably, described system also comprises the torque control unit, and the output torque of drive motor is regulated in the instruction that is used for sending according to Central Processing Unit (CPU).
With respect to prior art, the present invention has following advantage: because shift point can be located at the efficient district of motor rotation, efficiently distinguish rotating speed usually than higher, so the present invention can improve the road-holding property of vehicle greatly, give full play to efficiency of motor.
Description of drawings
Fig. 1 is the diagram of circuit of the gear-shifting control method of one embodiment of the present invention;
Fig. 2 is the diagram of circuit of the gearshift procedure of one embodiment of the present invention;
Fig. 3 is the structural representation of shift control of the present invention.
The specific embodiment
In the driving process of pure electric vehicle, directly be connected to drive axle without power-transfer clutch behind the takeoff output of drive motor by many grades of retarders, realize non-clutch shift.Chaufeur comes the moving velocity of control vehicle fully by throttle, the gearshift procedure in the change speed gear box is then finished under the relevant control setup of vehicle fully automatically.
In the working process of elec. vehicle, the electric energy of storage battery is converted into alternating current, and according to vehicle desired power size, electric machine controller can produce corresponding electric current.The moment of torsion of motor slows down to increase through change speed gear box and turns round, according to the needs of road, automatic speed-changing system (AMT) controller produces the control corresponding instruction, selects different gears, the rear-end gear reduction that the change speed gear box moment of torsion is delivered to vehicle through transmission shaft slows down to increase and is delivered to wheel after turning round, and makes vehicle movement.
In the present invention, as shown in Figure 1, in step 101, by the position of sensor measurement Das Gaspedal.Described sensor is converted to electric signal with unique signal of pedal, handles among the collected AMT of this electric signal, stores the numerical value of corresponding each shift point in AMT; Simultaneously by the speed sensor measuring vehicle when the front output shaft rotating speed.
In step 102, judge that pedal position is whether in the gear interval of present speed; Pedal signal and corresponding shift point numerical value and current vehicle speed are compared, whether need to carry out gear-change operation after determining.
If pedal position in current gear interval, then in step 103, keeps original gear, do not carry out gear-change operation.
If current pedal position not in current gear interval, is then judged the relation in current pedal position and current gear interval in step 104.If pedal position is positioned at the gear interval that is higher than the present speed of a motor vehicle, then need the operation that lowers category.Because pedal position is high more, show that the dynamics that navigating mate tramples is more little, promptly the aperture of throttle is more little, and required moving velocity is also just low more; Otherwise the required moving velocity of the high more expression of pedal position is high more.
Because gear need be reduced or raises, thus if do not regulate the rotating speed of drive motor, can cause the variation of the speed of a motor vehicle after the gear shift, and then influence the speed stationarity after the gear shift.
When pedal position is higher than the desired location, in step 105, heighten the rotating speed of drive motor, subsequently in step 106 operation that lowers category.Similarly, when pedal position is lower than desired location,, turn down the rotating speed of drive motor, carry out upshift operation in step 108 subsequently in step 107.
Fig. 2 is the diagram of circuit of control flow in the expression gearshift procedure.In step 201, after determining to need gear shift, after reaching shift point, mechanical automatic speed-changing system (AMT) sends the request of moment of torsion gradual change master mode to drive motor controller; After drive motor receives this request, if this moment, motor driver can response request, then send acknowledge signal, and reduce output torque with the expectant control rule to AMT.When the motor-driven moment of torsion was reduced to predetermined value gradually, motor promptly was in free schema, and motor driver is given AMT with this feedback of status.When decision carries out gear shift according to shift schedule, and described shift schedule can be taked any suitable control law, for example one-parameter shift schedule or two-parameter shift schedule etc.
In step 202, AMT receives after motor is in the feedback of status of free schema, and the control change-speed box is finished and plucked the shelves action.The described shelves of plucking move and can finish by plucking a grade motor, pluck grade motor and are connected with the shift fork of change-speed box, and AMT sends corresponding electric signal to the controller of plucking grade motor, plucks a grade electric motor starting, and the drive shift fork is finished and plucked the shelves action.
In step 203, after change-speed box is in neutral gear, then drive motor is carried out speed governing.Owing to need to keep the constant of output shaft rotating speed, therefore in gearshift procedure, need to adjust rotating speed of motor, particularly, AMT sends the speed-regulating mode request to electric machine controller, and electric machine controller carries out speed governing according to the rotating speed of target that AMT sends.Rotating speed of target can be got according to the speed of a motor vehicle and the calculating of target gear by AMT.
In step 204, in electric machine speed regulation, AMT control change-speed box carries out the bit selecting operation.Bit selecting operation can be finished by the bit selecting motor, and the bit selecting motor is connected with the transmission shaft of change-speed box, and the transmission gear by on the mobile transmission shaft axially makes different gears mesh, thereby reaches the purpose of speed change.
In step 205, after rotating speed of target reached, AMT sent the request of motor free schema to electric machine controller.Similarly, electric machine controller sends acknowledge signal to AMT, and reduces output torque with certain control law.When the motor-driven moment of torsion is reduced to predetermined value gradually, motor driver control motor promptly is in free schema, and motor driver is given AMT with this feedback of status.
In step 206, after AMT received the feedback of status of motor driver, confirms that motor is in free schema, AMT carried out gear-change operation.Gear-change operation is finished by gear shifting motor, and gear shifting motor moves by the tween drive shaft that connected shift fork drives change-speed box, through after synchronous, forms different gear mesh relations, thereby changes transmitting ratio.
In step 207, generally, finish shift control after, the AMT controller to control motor send the torque mode request, motor reverts to the moment of torsion output mode, enters the cruising state.
In whole gearshift procedure, the rotating speed of output shaft does not change, and has kept the consistent of the ride comfort of gearshift procedure and Vehicle Speed, therefore guaranteed vehicle steadily and operating characteristic.
Fig. 3 is the structural representation of shift control of the present invention.As shown in the figure, the control system of elec. vehicle of the present invention comprises pedal position detecting unit 3011, speed of a motor vehicle detecting unit 3012, Central Processing Unit (CPU) 302, torque control unit 303, electric machine speed regulation unit 304, bit selecting device 305, gearshift 306.
Pedal position detecting unit 3011 is used to detect accelerator pedal position.Described pedal position detecting unit 3011 can comprise equipment such as position transduser and A and D converter.By sensing, obtain the data of chaufeur desired speed to pedal position.Speed of a motor vehicle detecting unit 3012 is used to detect the vehicle current vehicle speed, and speed of a motor vehicle detecting unit 3012 can comprise electromagnetic type speed sensor, Hall-type speed sensor, and equipment such as A and D converter.
Central Processing Unit (CPU) 302 is connected with pedal position detecting unit 3011, speed of a motor vehicle detecting unit 3012, is used for regulating rotating speed of motor according to accelerator pedal position.The data that pedal position detecting unit 3011, speed of a motor vehicle detecting unit 3012 are gathered are transferred to control unit by data line, control unit 302 compares pedal position data and the setting data that defaults in the memory device of control unit, thereby determines whether to carry out gear-change operation.
Electric machine speed regulation unit 304 is connected with the pedal position detecting unit, is used to regulate the rotating speed of drive motor.Electric machine speed regulation unit 304 can utilize existing any suitable governor to realize, for example variable-frequency governor etc.
Gearshift 306 is used for carrying out gear-change operation after transferring to rotating speed of target.Gearshift 306 can comprise the electronics or the mechanical mechanism of gear case and other couplings.
Below the process that upgrades and lower category among the present invention is carried out exemplary illustration respectively.
In the gearshift procedure that upgrades of the embodiment of the invention:
1. the AMT controller sends request to electric machine controller, requires machine operation to be in and replaces page or leaf
After the AMT controller receives replying of electric machine controller, pluck the neutral operation;
2. according to the speed of a motor vehicle and target gear, the AMT controller calculates the expected value of speed governing, be that rotating speed of motor drops to gear shift needed tachometer value constantly, send the expected value of speed governing and the signal that motor is in speed-regulating mode to electric machine controller, AMT controller control bit selecting motor carries out bit selecting in this process, represent that when the percentum of bit selecting position arrives expected value bit selecting finishes, if motor speed this moment miss the mark value also, then the AMT controller is waited for;
3. when motor arrival expected value, the AMT controller sends to electric machine controller and requires machine operation to be in free schema, after the AMT controller receives replying of electric machine controller, carries out gear-change operation, after the percentum of shift pattern reached expected value, shift process was finished;
4. the AMT controller sends torque mode to electric machine controller, makes the external output torque of motor.
And in the gearshift procedure that lowers category of the embodiment of the invention:
1. the AMT controller sends request to electric machine controller, requires machine operation to be in free schema, after the AMT controller receives replying of electric machine controller, plucks the neutral operation;
2. according to the speed of a motor vehicle and target gear, the AMT controller calculates the expected value of speed governing, be that rotating speed of motor is raised to gear shift needed value constantly, send the expected value of speed governing and the signal that motor is in speed-regulating mode to electric machine controller, AMT controller control bit selecting motor carries out bit selecting in this process, represent that when the percentum of bit selecting position arrives expected value bit selecting finishes, if motor speed this moment miss the mark value also, then the AMT controller is waited for;
3. when motor arrival expected value, the AMT controller sends to electric machine controller and requires machine operation to be in free schema, after the AMT controller receives replying of electric machine controller, carries out gear-change operation, after the percentum of shift pattern reached expected value, shift process was finished;
4. the AMT controller sends torque mode to electric machine controller, makes the external output torque of motor.
The present invention is applied to elec. vehicle, and wherein " Das Gaspedal " speech is meant the control pedal of drive motor, and is not the Das Gaspedal that refers to fuel combustion vehicle.Although the present invention is described by above-mentioned preferred implementation, its way of realization is not limited to above-mentioned embodiment.Should be realized that under the situation that does not break away from purport of the present invention those skilled in the art can make different variations and modification to the present invention.
Claims (1)
1. the non-clutch shift control method of a pure electric vehicle is characterized in that,
A. detect the accelerator pedal position and the speed of a motor vehicle;
B11. send moment of torsion gradual change request to drive motor controller;
B12. after drive motor controller receives request signal, the output torque of drive motor is reduced to predetermined value;
B2. pluck the neutral gear operation;
B3. the drive motor rotating speed is transferred to rotating speed of target, and in speed governing, carry out bit selecting;
C1. send moment of torsion gradual change request to drive motor controller;
C2. after drive motor controller receives request signal, the output torque of drive motor is reduced to predetermined value;
C3. after being adjusted to rotating speed of target, machine operation is in free schema, carries out gear-change operation;
D. after finishing gear-change operation, drive motor recovers moment of torsion output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101257934A CN101323302B (en) | 2007-07-31 | 2008-06-25 | Non-clutch shift control method and control system of pure electric vehicle |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710119820 | 2007-07-31 | ||
| CN200710119820.2 | 2007-07-31 | ||
| CN2008101257934A CN101323302B (en) | 2007-07-31 | 2008-06-25 | Non-clutch shift control method and control system of pure electric vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101323302A CN101323302A (en) | 2008-12-17 |
| CN101323302B true CN101323302B (en) | 2011-06-22 |
Family
ID=40187051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101257934A Expired - Fee Related CN101323302B (en) | 2007-07-31 | 2008-06-25 | Non-clutch shift control method and control system of pure electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101323302B (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103802831B (en) * | 2012-11-07 | 2016-05-04 | 北汽福田汽车股份有限公司 | The control method of electric automobile |
| CN104590265B (en) * | 2014-11-28 | 2017-08-08 | 重庆小康工业集团股份有限公司 | A kind of control method and its control system of the fluid drive of electric car two speed transmission |
| CN106438988A (en) * | 2016-11-22 | 2017-02-22 | 山东理工大学 | Intervening control method for downshifting of three-gear wire-driven automatic transmission of electric vehicle |
| CN106555877A (en) * | 2016-11-22 | 2017-04-05 | 山东理工大学 | The gear line traffic control automatic transmission upshift intervention control method of electric automobile two |
| CN106641230A (en) * | 2016-11-22 | 2017-05-10 | 山东理工大学 | Intervening control method for down shift of two-gear drive-by-wire automatic transmission of electric automobile |
| CN106481803A (en) * | 2016-11-22 | 2017-03-08 | 山东理工大学 | Electric automobile two keeps off line traffic control automatic transmission shift intervention control method |
| CN106337930A (en) * | 2016-11-22 | 2017-01-18 | 山东理工大学 | The high-speed step-up intervention control method for three-gear line control automatic transmission of electric car |
| CN107117160B (en) * | 2017-03-10 | 2019-04-09 | 北京理工大学 | A kind of drive system of electric automobile and control method |
| CN107120426A (en) * | 2017-04-28 | 2017-09-01 | 北京新能源汽车股份有限公司 | A kind of Control of Electric Vehicles method, device and electric automobile |
| CN109505969B (en) * | 2017-09-14 | 2021-09-03 | 比亚迪股份有限公司 | Shift control system of vehicle and method thereof |
| CN107791968B (en) * | 2017-09-26 | 2019-09-10 | 厦门金龙汽车新能源科技有限公司 | A kind of pure electric coach AT gearbox shifting control device and control method |
| CN109237010B (en) * | 2018-09-06 | 2020-08-18 | 南京奥吉智能汽车技术研究院有限公司 | Static gear engaging failure processing method for mechanical automatic transmission of pure electric vehicle |
| CN110053603B (en) * | 2019-04-25 | 2021-07-30 | 奇瑞汽车股份有限公司 | Shift control method and apparatus for electric vehicle |
| CN110296186B (en) * | 2019-06-24 | 2022-07-05 | 山推工程机械股份有限公司 | Two-gear pure electric transmission system, pure electric engineering vehicle and control method thereof |
| CN111645537B (en) * | 2020-06-09 | 2021-09-03 | 恒大恒驰新能源汽车研究院(上海)有限公司 | Gear shifting method of two-gear transmission of electric automobile, storage medium, electronic equipment and electric automobile |
| CN114791039B (en) * | 2021-01-25 | 2023-09-15 | 长城汽车股份有限公司 | Gear shifting control method and device for rear axle gearbox and vehicle |
| CN114559943B (en) * | 2022-04-15 | 2024-04-26 | 安徽华菱汽车有限公司 | Vehicle and AMT auxiliary box driving gear-down recovery control method, system and device thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1438137A (en) * | 2003-01-27 | 2003-08-27 | 北方交通大学 | Gear-shifting control method for parallel mixed powder system |
| CN1528612A (en) * | 2003-10-17 | 2004-09-15 | 清华大学 | Power output changing-over method and control system for power assembly of mixed powder car |
| CN101012880A (en) * | 2007-01-24 | 2007-08-08 | 北京理工大学 | Integrated electric auto-shifting device used for transmission case of commercial vehicle |
-
2008
- 2008-06-25 CN CN2008101257934A patent/CN101323302B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1438137A (en) * | 2003-01-27 | 2003-08-27 | 北方交通大学 | Gear-shifting control method for parallel mixed powder system |
| CN1528612A (en) * | 2003-10-17 | 2004-09-15 | 清华大学 | Power output changing-over method and control system for power assembly of mixed powder car |
| CN101012880A (en) * | 2007-01-24 | 2007-08-08 | 北京理工大学 | Integrated electric auto-shifting device used for transmission case of commercial vehicle |
Non-Patent Citations (1)
| Title |
|---|
| 龚鹏等.电机驱动式自动变速操纵系统的台架试验研究.《车辆与动力技术》.2003,(第4期),全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101323302A (en) | 2008-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101323302B (en) | Non-clutch shift control method and control system of pure electric vehicle | |
| CN100436888C (en) | Method and system for automatic freewheeling of vehicle | |
| CN101746374B (en) | Control method and control system of electronic-control mechanical type automatic transmission of pure electric vehicle | |
| CN101140198B (en) | Vehicle double clutch type automatic speed transmission hardware in ring emulation test-bed | |
| CN102596675B (en) | Method for controlling a rolling or coasting function of a vehicle | |
| CN102278391B (en) | Control method of clutch based on revolving speed | |
| CN101214817B (en) | Automatic braking system | |
| CN102180103B (en) | Driving system for electric vehicle | |
| CN108533739B (en) | Gear shifting method and device for automatic transmission vehicle | |
| CN103047408B (en) | A kind of automatic gearbox gear shifting method and vehicle | |
| CN104742904A (en) | Cruise control method and system | |
| CN102506163B (en) | Quick gear-shift control method and control system for electric vehicle gearbox | |
| CN108312896A (en) | Adaptively pre- speed governing keeps off dynamic coupling device and its control method more for a kind of bi-motor | |
| CN105179682B (en) | The shift control method and system of a kind of two gears transmission vehicle | |
| CN107117160A (en) | A kind of drive system of electric automobile and control method | |
| CN202016405U (en) | Driving system for electric vehicle | |
| CN104386058A (en) | Control method for improving ride comfort of start based on AMT gearbox | |
| KR100497553B1 (en) | Transmission ratio automatic adjustment device | |
| SE524456C2 (en) | Method and apparatus for controlling slat coupling | |
| WO2017177110A1 (en) | Methods for predictive shifting | |
| CN103527768B (en) | A kind of shift decided method estimated based on heavy AMT road vehicle load | |
| CN105046050B (en) | A kind of dynamic gradient computational methods based on automobile dynamics | |
| CN102494123A (en) | Method for determining transmission ratio of economical gear of stepped speed changer | |
| CN105134942A (en) | Gear-shifting control method for driving intention change during kick-down process | |
| CN106347352A (en) | Hybrid power energy management system and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20200625 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |