CN109808505A - The dynamical system of pure electric automobile - Google Patents
The dynamical system of pure electric automobile Download PDFInfo
- Publication number
- CN109808505A CN109808505A CN201711168499.7A CN201711168499A CN109808505A CN 109808505 A CN109808505 A CN 109808505A CN 201711168499 A CN201711168499 A CN 201711168499A CN 109808505 A CN109808505 A CN 109808505A
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- gear
- speed
- driving motor
- electric automobile
- pure electric
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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
- 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
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Abstract
The present invention relates to a kind of automobile dynamic systems, more particularly to a kind of dynamical system of pure electric automobile, including power battery, driving motor, speed changer, gear shifting actuating mechanism and differential mechanism, entire car controller is according to other status informations such as pedal signal, speed signal and the vehicle received, road surface, judge whether to shift gears according to shift schedule, and driving motor target torque/revolving speed and operational mode are calculated, speed changer target gear and shifting commands flag bit are set, and are sent in CAN bus；Using the dynamical system of the pure electric automobile of technical solution of the present invention, entire shift process is steady quickly, impact is small, power loss is few, and shift quality is high, has preferable industrialization prospect.
Description
Technical field
The present invention relates to a kind of automobile dynamic systems, and in particular to a kind of dynamical system of pure electric automobile.
Background technique
As electric car is strided forward to industrialization, performance requirement is higher and higher, is not only limited to the reality of its driving functions
It is existing, and increasingly emphasize the raising of the dynamic property, economy, driver comfort and control stability of vehicle.Power drive system
One of core component as electric car, especially pure electric automobile, configurations will generate these performances apparent
It influences.Pure electric automobile mostly uses the power transmission arrangment of driving motor combination single-stage speed reducing at present, which is due to speed ratio
Fixed value can not meet the requirements such as vehicle launch torque is big, motor efficient operating regime is wide simultaneously.
Summary of the invention
It is an object of the invention to solve above-mentioned technical problem, the dynamical system of pure electric automobile is provided, was entirely shifted gears
Cheng Pingwen is quickly, impact is small, power loss is few, and shift quality is high, has preferable industrialization prospect.
In order to solve the above technical problems, present invention employs the dynamical system of pure electric automobile, including power battery, driving
Motor, speed changer, gear shifting actuating mechanism and differential mechanism, entire car controller is according to pedal signal, speed signal and the vehicle received
, other status informations such as road surface, judge whether to shift gears according to shift schedule, and calculate driving motor target torque/revolving speed and
Operational mode is arranged speed changer target gear and shifting commands flag bit, and is sent in CAN bus；Drive motor controller
The letter such as the target torque/revolving speed and the information such as operational mode in CAN bus are received, while acquiring motor speed, electric current and temperature
Breath, controls driving motor output torque as requested under torque mode, controls driving motor as requested under revolving speed mode
Export revolving speed；Gearbox controller receives the target gear and shifting commands zone bit information in CAN bus, while acquiring shift
Mechanism position, speed changer export the information such as revolving speed and oil temperature, and control gear shifting actuating mechanism carries out plucking gear and operation of putting into gear.
Further, in above-mentioned technical proposal, the driving motor is permanent magnet synchronous motor.
Further, in above-mentioned technical proposal, the speed changer is multistage gear speed transmission.
Further, in above-mentioned technical proposal, the gear shifting actuating mechanism is electricity powered gearshift.
It, can be abundant the utility model has the advantages that the structure type integrated using driving motor and multiple-speed gear-box possessed by of the invention
The power that driving motor output is adjusted using speed changer improves vehicle using that can increase motor torque output area when large speed ratio
Dynamic property；Using the efficient operation section that can expand motor when small speed ratio, power drive system energy efficiency is improved, is dropped simultaneously
Low requirement and system synthesis sheet to motor performance itself.In addition self shifter is used, it can be by designing suitable shift
Strategy improves dynamic property, economy and the driver comfort of vehicle.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Specific embodiment
The present invention will be further described below with reference to the drawings.
As shown in Figure 1, the present invention provides the dynamical system of pure electric automobile, including power battery, driving motor, speed change
Device, gear shifting actuating mechanism and differential mechanism, entire car controller is according to pedal signal, speed signal and the vehicle received, road surface etc.
Other status informations judge whether to shift gears, and calculate driving motor target torque/revolving speed and operational mode according to shift schedule,
Speed changer target gear and shifting commands flag bit are set, and are sent in CAN bus；It is total that drive motor controller receives CAN
The information such as target torque/revolving speed and operational mode on line, while the information such as motor speed, electric current and temperature are acquired, in torque
Driving motor output torque is controlled under mode as requested, controls driving motor output revolving speed as requested under revolving speed mode；
Gearbox controller receive CAN bus on target gear and shifting commands zone bit information, while acquire gearshift position,
Speed changer exports the information such as revolving speed and oil temperature, and control gear shifting actuating mechanism carries out plucking gear and operation of putting into gear.
Driving motor is permanent magnet synchronous motor.
Speed changer is multistage gear speed transmission.
Gear shifting actuating mechanism is electricity powered gearshift.
One transmission power system of pure electric vehicle motor is due to eliminating clutch, and driving motor characteristic and engine
Characteristic is different, so shift process, relative to traditional AMT different from, specific shift process can be divided into following steps.
1) it unloads
After entire car controller determines to enter shift mode, unloading operation is carried out first.Due to there is no clutch, unloaded
Cheng Buneng is completed by the separation of mechanical organ, but to be allowed to change to no-load torque by the control to motor torque,
It can just make to reach no-load synchronous regime between speed changer meshing gear, so that carry out next step plucks gear.In the process, vehicle
Controller requires driving motor still to operate in torque mode, and the slop control of torque variation is realized also by entire car controller,
Under the premise of guaranteeing that jitter phenomenon does not occur for drive system, more torque change rate as far as possible, to reduce vehicles dynamic performance
Loss.The target gear of speed changer remains unchanged at this time.
2) gear is plucked
After unloading, electric machine controller feeds back unloading end mark position to entire car controller.Entire car controller receives
After the flag bit is l, starts pluck gear operation, send target gear to gearbox controller.Gearbox controller receives
After target gear, the shift motor controlled in gear shifting actuating mechanism works, and separates clutch collar with the gear ring of current shift,
Acquisition position sensor information simultaneously reaches neutral gear position with confirmation.It is constant to remain within no-load torque state for motor at this time.
3) it adjusts the speed
After plucking gear, gearbox controller plucks gear end mark position to entire car controller feedback.Entire car controller receives
To the flag bit be 1 after, start carry out driving motor speed regulation operation.In the general driving process of pure electric automobile, driving
Motor due to it is received be all torque-demand, without carrying out rotational speed regulation operation.But in shift process, the step for be must not
It can lack.It is actively adjusted the speed by driving motor, on the one hand can reduce speed difference when target gear engagement, reduce impact of putting into gear；Separately
On the one hand shorter using the governing time of electromagnetic mode, further shorten shift time.In the process, entire car controller is wanted
Driving motor is asked to be switched to revolving speed mode, at this point, rotating speed of target is
ne *=nt×io
(1) in formula: ne *For the rotating speed of target of motor；ntFor the current real-time revolving speed of speed changer；ioFor target gear transmission
Than.
When section of the difference of motor rotating speed of target and actual speed in defined, entire car controller determines speed regulation process
Terminate.Speed changer maintains neutral position state in entire speed regulation process.
4) it puts into gear
After speed regulation process, the operational mode of motor is switched to torque mode, target torque again by entire car controller
It is zero, and starts to carry out operation of putting into gear, the instruction flag position that will put into gear is sent to gearbox controller.Gearbox controller receives
It puts into gear after instruction flag position is 1, the shift motor controlled in gear shifting actuating mechanism is synchronized and put into gear, and makes clutch collar and targeted gear
The gear ring engagement of position, while acquisition position sensor information, reach target gear position with confirmation.The phase of putting into gear asks motor for zero load
Torque conditions.The system is since motor output shaft and transmission input shaft are connected directly, when being put into gear, from input terminal
Rotary inertia is big compared to the rotary inertia of clutch driven disk in tradition AMT, but since the speed regulation of driving motor is so that both ends
Speed difference is decreased to synchronous regime, therefore impact when putting into gear is little.
5) it loads
After putting into gear, torque must be applied again, to meet the needs of current vehicle power.Entire car controller exits shift
Mode calculates driving motor target torque according to information such as current pedal state and speeds, and pass through into general driving mode
Electric machine controller controls motor torque.It is gradually loaded compared to traditional AMT by the sliding wear process realization of clutch, which also needs
It to be realized by control driving motor from no-load torque to the change rate of target locked-in torque, which should ensure that
Under the premise of not influencing driver comfort, reduce power loss as far as possible.
The description and the appended drawings of the invention be considered as it is illustrative and not restrictive, on the basis of the present invention, ability
According to disclosed technology contents, some of technical characteristics can be made field technique personnel by not needing creative labor
Some replacements and deformation, are within the scope of the invention.
Claims (4)
1. the dynamical system of pure electric automobile, it is characterised in that: including power battery, driving motor, speed changer, shift execution machine
Structure and differential mechanism, entire car controller according to other status informations such as pedal signal, speed signal and the vehicle received, road surface,
Judge whether to shift gears according to shift schedule, and calculate driving motor target torque/revolving speed and operational mode, speed changer target is set
Gear and shifting commands flag bit, and be sent in CAN bus；Drive motor controller receive CAN bus on target torque/
The information such as revolving speed and operational mode, while the information such as motor speed, electric current and temperature are acquired, it is controlled as requested under torque mode
Driving motor output torque processed controls driving motor output revolving speed as requested under revolving speed mode；Gearbox controller receives
Target gear and shifting commands zone bit information in CAN bus, at the same acquire gearshift position, speed changer output revolving speed and
The information such as oil temperature, control gear shifting actuating mechanism carry out plucking gear and operation of putting into gear.
2. the dynamical system of pure electric automobile according to claim 1, it is characterised in that: the driving motor is that permanent magnetism is same
Walk motor.
3. the dynamical system of pure electric automobile according to claim 1, it is characterised in that: the speed changer is multistage gear
Speed changer.
4. the dynamical system of pure electric automobile according to claim 1, it is characterised in that: the gear shifting actuating mechanism is electricity
Control electric gear shifting mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711168499.7A CN109808505A (en) | 2017-11-21 | 2017-11-21 | The dynamical system of pure electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711168499.7A CN109808505A (en) | 2017-11-21 | 2017-11-21 | The dynamical system of pure electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109808505A true CN109808505A (en) | 2019-05-28 |
Family
ID=66600719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711168499.7A Withdrawn CN109808505A (en) | 2017-11-21 | 2017-11-21 | The dynamical system of pure electric automobile |
Country Status (1)
| Country | Link |
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| CN (1) | CN109808505A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110370945A (en) * | 2019-07-22 | 2019-10-25 | 江苏埃驱奥新能源科技有限公司 | Based on pure electric vehicle automatic gear-box low speed with turning control system and its control method |
| CN113104013A (en) * | 2021-05-21 | 2021-07-13 | 重庆军工产业集团有限公司 | Gear shifting method based on two-gear AMT pure electric vehicle braking condition |
-
2017
- 2017-11-21 CN CN201711168499.7A patent/CN109808505A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110370945A (en) * | 2019-07-22 | 2019-10-25 | 江苏埃驱奥新能源科技有限公司 | Based on pure electric vehicle automatic gear-box low speed with turning control system and its control method |
| CN110370945B (en) * | 2019-07-22 | 2020-10-02 | 江苏埃驱奥新能源科技有限公司 | Low-speed follow-up control system based on pure electric automatic gearbox and control method thereof |
| CN113104013A (en) * | 2021-05-21 | 2021-07-13 | 重庆军工产业集团有限公司 | Gear shifting method based on two-gear AMT pure electric vehicle braking condition |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190528 |
|
| WW01 | Invention patent application withdrawn after publication |