CN104648184B - Multi-mode drive control method of pure electric vehicle - Google Patents
Multi-mode drive control method of pure electric vehicle Download PDFInfo
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- CN104648184B CN104648184B CN201410850451.4A CN201410850451A CN104648184B CN 104648184 B CN104648184 B CN 104648184B CN 201410850451 A CN201410850451 A CN 201410850451A CN 104648184 B CN104648184 B CN 104648184B
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- 230000007812 deficiency Effects 0.000 description 2
- 230000035807 sensation Effects 0.000 description 2
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/72—Electric energy management in electromobility
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Abstract
The invention provides a multi-mode drive control method of a pure electric vehicle, wherein a vehicle controller judges the drive mode state of the vehicle, and corresponds to different function tables according to different drive modes, the input values of the function tables are the current vehicle speed and the opening degree of an accelerator pedal, the input values are searched in the function tables to obtain the torque parameter value, and finally, the torque output value is determined according to the product of the obtained torque parameter value and the peak torque value which can be obtained under the current rotating speed of a motor. By introducing a curved surface control strategy formulated by a vehicle speed signal in various modes, the defect caused by insufficient torque at the rear section of the driving motor is effectively avoided, the working range of the driving motor is optimized, and the economy of the whole vehicle is improved.
Description
Technical field
The present invention relates to the Drive Control Technique field of pure electric automobile, and in particular to a kind of multi-mode of pure electric automobile
Drive control method.
Background technology
Pure electric automobile as the pollution-free and energy can variation configuration new traffic tool in environment and energy problem
Under overall background as focus, the common concern of people is caused, and has obtained great development, is also automobile work from now on
One of important directions of industry development.
Especially on electric automobile, the abundant functional configuration that electronic control system is brought greatly improves user to electronic vapour
The manipulation experience of car, therefore widely use the visible trend that electronic control system is development of automobile.Driving mode selection therein
System is that driver is controlled by button or switch, is electronically switched between kinetic characteristic and comfort properties, Ke Yigeng
Coordinate well to drive motility and comfortableness, product can be made commercially to obtain bigger competitiveness, at present in the new energy of many moneys
Emerged from the automobile of source.It is to be directed to electric automobile feature development drive pattern control using the premise of driving mode selection system
The strategy of system.
The corresponding three kinds of drive pattern sides of control strategy commonly used at present are motor pattern, mode standard and economy
Corresponded to respectively under pattern, every kind of drive pattern and design its pattern strategy curve as shown in figure 1, the abscissa in figure is accelerator pedal
Aperture, ordinate is motor torque coefficient (peak torque that can be reached under torque coefficient=current torque/current rotating speed), its
In：
Mode standard curve is that accelerator pedal aperture and motor torque coefficient are linear, i.e., driver steps on certain coefficient
Accelerator pedal, VCU sends motor peak torque and is multiplied by the torque value of same factor；Motor pattern curve is located in mode standard
Change in torque is fast under side, leading portion accelerator pedal aperture, and back segment is then relatively slow, and in whole accelerator pedal open range, big portion
Split-phase is above the torque value under mode standard with the torque value of motor pattern under accelerator pedal aperture, therefore motor pattern is got off
Acceleration will be due to mode standard；And economic model is then conversely, the performance of specific dynamic property and economic performance needs
Analyzed by experimental test.Above-mentioned Three models curve covers the whole torque range of motor, that is to say, that in any mould
Under formula, driver can allow vehicle to play maximum power performance under this pattern.
But, in current control strategy, in the economy mode when vehicle is in starting operating mode and runs at a low speed operating mode,
Because torque coefficient is smaller, therefore torque value is in the inefficient area of motor work, is unfavorable for the raising of vehicle economy；In power
Under pattern, because the torque coefficient change of motor high regime is little and motor external characteristics determines the peak torque of motor with rotating speed liter
It is high and reduce, the response moment of torsion deficiency of vehicle accelerator pedal when high velocity is travelled can be caused.
The content of the invention
In view of this, the present invention provides a kind of multi-mode drive control method of pure electric automobile, it is intended to make vehicle each
Output torque value under individual drive pattern state can optimize the vehicle economy under the state.
The technical solution adopted by the present invention is specially：
A kind of multi-mode drive control method of pure electric automobile, entire car controller judges the drive pattern shape residing for vehicle
State, and according to the different function table of different drive pattern correspondences, the input value of the function table is that current vehicle speed and acceleration are stepped on
Plate aperture, acquisition torque parameter value is searched by input value, finally according to the torque parameter value obtained and electricity in function table
The product of accessible peak torque value determines torque output under the current rotating speed of machine.
In the multi-mode drive control method of above-mentioned pure electric automobile, entire car controller first determines whether the drive residing for vehicle
Mode status is economic model, motor pattern or general mode；Wherein：
In the case where drive pattern is economic model, correspondence economic model function table is opened by current accelerator pedal
Degree and current vehicle speed, which are searched, obtains current torque coefficient value；
In the case where drive pattern is motor pattern, correspondence motor pattern function table is opened by current accelerator pedal
Degree and current vehicle speed, which are searched, obtains current torque coefficient value；
In the case where drive pattern is general mode, then current torque coefficient value is equal to current accelerator pedal opening value；
Corresponding to current drive pattern, according to current torque coefficient, with reference to motor speed and motor external characteristic curve, meter
The torque output of motor is calculated, this torque value is sent to electric machine controller by entire car controller, and electric machine controller makes driving
Motor drives vehicle with the output valve.
In the multi-mode drive control method of above-mentioned pure electric automobile, in speed and the feelings of accelerator pedal aperture all same
Under condition, the torque parameter value that motor pattern is obtained is more than the torque parameter value obtained in the economy mode.
In the multi-mode drive control method of above-mentioned pure electric automobile, it is bent that the torque output is equal to motor external characteristics
The corresponding maximum torque of current motor rotating speed and the product of the current torque coefficient value in line.
The beneficial effect comprise that：
The multi-mode drive control method of the present invention can realize power, cutting between economic and common three kinds of driving models
Change, by introducing the curved surface control strategy formulated by GES in each mode, effectively evaded the torsion of motor back segment
The shortcoming that square deficiency is brought, can substantially mitigate driving fatigue, while optimizing the operation interval of motor, improve vehicle warp
Ji property.In addition, and control method avoids motor low torque area (below torque coefficient 0.2) in the present invention, effectively improve whole
The dynamic property of car.
Brief description of the drawings
When considered in conjunction with the accompanying drawings, the present invention can more completely be more fully understood.Accompanying drawing described herein is used for providing
A further understanding of the present invention, embodiment and its illustrate be used for explain the present invention, do not constitute inappropriate limitation of the present invention.
Fig. 1 is that motor pattern, mode standard and economic model are corresponding for the drive pattern currently used for pure electric automobile
Tactful curve map；
Fig. 2 is a kind of policy map of the multi-mode drive control method of pure electric automobile of the invention.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is described in further detail to technical scheme.
A kind of multi-mode drive control method of pure electric automobile of the present invention is as shown in Fig. 2 first, vehicle is provided with economy
The mode selecting button of pattern and motor pattern, when under the not actuated any mode button state of driver, defines vehicle traction mould
Formula is general mode.When entire car controller, which collects driver, starts motor pattern button signal, vehicle driving patterns are defined
For motor pattern, when entire car controller, which collects driver, starts economic model button signal, defining vehicle driving patterns is
Economic model.
Entire car controller VCU judges the drive pattern state residing for vehicle for economic model, motor pattern or common mould
Formula, and according to the different function table of different drive pattern correspondences, the input value of function table is that current vehicle speed and accelerator pedal are opened
Degree, is searched acquisition torque parameter value in function table by input value, worked as finally according to the torque parameter value obtained with motor
The product of accessible peak torque value determines torque output under preceding rotating speed；Wherein：
In the case where drive pattern is economic model, correspondence economic model function table is opened by current accelerator pedal
Degree and current vehicle speed, which are searched, obtains current torque coefficient value；
In the case where drive pattern is motor pattern, correspondence motor pattern function table is opened by current accelerator pedal
Degree and current vehicle speed, which are searched, obtains current torque coefficient value；
In the case where drive pattern is general mode, then current torque coefficient value is equal to current accelerator pedal opening value；
Corresponding to current drive pattern, according to current torque coefficient, with reference to motor speed and motor external characteristic curve, meter
The torque output of motor is calculated, this torque value is sent to electric machine controller by entire car controller, and electric machine controller makes driving
Motor drives vehicle with the output valve.
The function table of economic model and motor pattern can pass through the two values according to current vehicle speed and accelerator pedal aperture
Searched in function table and obtain torque parameter value.The difference of two function tables is, the function table under motor pattern, in identical speed
In the case of accelerator pedal aperture, the torque parameter value obtained under the more economical pattern of torque parameter value obtained is big, therefore
The actual torque value of final output is big, and corresponding vehicle is under same speed, and driver steps on same accelerator pedal aperture, car
Dynamic property than good under economic model.On the contrary, in the economy mode, under same speed, driver step on same
During accelerator pedal aperture, the torque parameter value obtained under the more economical pattern of torque parameter value obtained is big, therefore final defeated
The actual torque value gone out is small, and corresponding battery discharge power is also smaller, is conducive to reducing vehicle energy consumption, improves vehicle economy
Can, extend electric automobile continual mileage.
Set current vehicle speed as function table input condition the reason for be：As motor speed raises (correspondence vehicle car
Speed rise) max. output torque of motor declines and determined by motor external characteristics, therefore (right in different motor speed regions
Answer different vehicle speed ranges), identical torque parameter value is exported in function table, the torque output actually obtained is different.Drive
Member steps on identical accelerator pedal aperture, vehicle when running at high speed compared to low vehicle speeds when the power that is obtained it is smaller,
Driving sensation has to be optimized.In the present invention, by the way that as the input condition of function table, current vehicle speed is made into same accelerator pedal
Under the conditions of aperture, the torque coefficient value that different speeds correspondence is found increase as speed increases, finally with increase with speed and
The product (i.e. actual torque output valve) of the peak torque of reduction is kept than more uniform output, optimizes driving sensation.Moment of torsion
Output valve is equal to multiplying for the corresponding maximum torque of current motor rotating speed and the current torque coefficient value in motor external characteristic curve
Product.
As described above, being explained to embodiments of the invention, it is clear that as long as essentially without this hair of disengaging
Bright inventive point and effect, will be readily apparent to persons skilled in the art deformation, also be all contained in the guarantor of the present invention
Within the scope of shield.
Claims (4)
1. a kind of multi-mode drive control method of pure electric automobile, it is characterised in that entire car controller is judged residing for vehicle
Drive pattern state, and according to the different function table of different drive pattern correspondences, the input value of the function table is current vehicle
Speed and accelerator pedal aperture, acquisition torque parameter value are searched by input value, finally according to the moment of torsion obtained in function table
Parameter value and the product of accessible peak torque value under the current rotating speed of motor determine torque output, wherein, drive pattern shape
State includes economic model, motor pattern or general mode, in the case where drive pattern is economic model, correspondence economic model
Function table, is searched by current accelerator pedal aperture and current vehicle speed and obtains current torque coefficient value, is fortune in drive pattern
In the case of dynamic model formula, correspondence motor pattern function table is searched to obtain and worked as by current accelerator pedal aperture and current vehicle speed
Preceding torque coefficient value, wherein, the torque parameter value obtained under motor pattern is more than the torque parameter value obtained under economic model.
2. the multi-mode drive control method of pure electric automobile according to claim 1, it is characterised in that wherein：
In the case where drive pattern is general mode, then current torque coefficient value is equal to current accelerator pedal opening value；
Corresponding to current drive pattern, according to current torque coefficient, with reference to motor speed and motor external characteristic curve, calculate and drive
This torque value is sent to electric machine controller by the torque output of dynamic motor, entire car controller, and electric machine controller makes motor
Vehicle is driven with the output valve.
3. the multi-mode drive control method of pure electric automobile according to claim 2, it is characterised in that speed and plus
In the case of speed pedal aperture all same, the torque parameter value that motor pattern is obtained is more than the moment of torsion obtained in the economy mode
Parameter value.
4. the multi-mode drive control method of pure electric automobile according to claim 2, it is characterised in that the moment of torsion is defeated
Go out value equal to the corresponding maximum torque of current motor rotating speed in motor external characteristic curve and the current torque coefficient value
Product.
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| CN201410850451.4A CN104648184B (en) | 2014-12-30 | 2014-12-30 | Multi-mode drive control method of pure electric vehicle |
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| CN108621859A (en) * | 2017-03-24 | 2018-10-09 | 华晨汽车集团控股有限公司 | A kind of drive control method of pure electric automobile |
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| JP7513649B2 (en) | 2022-03-28 | 2024-07-09 | 本田技研工業株式会社 | Sudden acceleration suppression device |
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