CN115523288A - Control method for gear management of pure electric vehicle - Google Patents
Control method for gear management of pure electric vehicle Download PDFInfo
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- CN115523288A CN115523288A CN202211137498.7A CN202211137498A CN115523288A CN 115523288 A CN115523288 A CN 115523288A CN 202211137498 A CN202211137498 A CN 202211137498A CN 115523288 A CN115523288 A CN 115523288A
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- gear
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- pure electric
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000003068 static effect Effects 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 230000007704 transition Effects 0.000 description 5
- 230000009193 crawling Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000011217 control strategy Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/02—Selector apparatus
- F16H59/08—Range selector apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/18—Preventing unintentional or unsafe shift, e.g. preventing manual shift from highest gear to reverse gear
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a control method for gear management of a pure electric vehicle, wherein a rotating part of a gear knob of the pure electric vehicle comprises five gears which are respectively a middle position, and an L1 gear of an N gear and an L2 gear of an R gear are sequentially arranged on the left side of the middle position; the right side of the middle position is sequentially provided with an R1 gear of the N gear and an R2 of the D gear; when the vehicle speed is in the range of-2 km/< V <2km/h, the vehicle is considered to be in a static state, and the gear conversion conditions are as follows: the gears are in P gear, R gear or N gear: no P gear request and no gun inserting signal are generated, and the vehicle is in a high-voltage state; and (5) stepping on the brake, and rotating the gear knob to the R2 position of the D gear. By adopting the technical scheme, the gear to be currently positioned in the P/R/N/D is judged according to the position of the gear shifter and the working condition of the whole vehicle; the motion of each power component is coordinated, and the normal operation of the electric automobile is ensured through gear management.
Description
Technical Field
The invention belongs to the technical field of research on a control strategy (such as gear function definition) for transmitting signals between a VCU and a gear device. Specifically, the invention relates to research on a gear management control strategy of a pure electric vehicle.
Background
In the electric automobile, a vehicle control unit VCU is a core control component, is a regulation and control center of each subsystem of the electric automobile, coordinates and manages the running state of the whole automobile, and calculates parameters such as motor output torque and the like required by running according to the operation intention of a driver such as the position of an accelerator pedal, a gear, the force of a brake pedal and the like and the charge state of a storage battery, so that the motion of each power component is coordinated, and the normal running of the electric automobile is guaranteed. However, in the current stage of project development, the strategy and gear design are insufficient, and the method specifically comprises the following steps:
1. the vehicle is judged to be in a static state when the vehicle speed (-5 km/< V <5 km/h) or the rotating speed (-800rpm is restricted to N and 800rpm), the gear can be switched back and forth, the gear state is easily misjudged by a driver, and the driving safety is influenced;
2. the existing gear design only comprises R1 (N), R2 (D) and L2 (R), and in the gear switching process, the transition space is small, and the error is easy to switch.
Disclosure of Invention
The invention provides a control method for gear management of a pure electric vehicle, and aims to ensure safe gear switching and normal driving of the whole vehicle through gear strategy adjustment and gear redesign.
In order to achieve the above object, a first technical solution adopted by the present invention is:
according to the control method for the gear management of the pure electric vehicle, the rotating part of the gear knob of the pure electric vehicle comprises five gears which are respectively a middle position, and an L1 gear of an N gear and an L2 gear of an R gear are sequentially arranged on the left side of the middle position; the right side of the middle position is sequentially provided with an R1 gear of the N gear and an R2 of the D gear;
when the vehicle speed is in the range of-2 km/< V <2km/h, the vehicle is considered to be in a static state, and the gear conversion conditions are as follows:
the gears are in P gear, R gear or N gear: no P gear request and no gun inserting signal exist, and the vehicle is in a high-voltage state; and (5) stepping on the brake, rotating the gear knob to the R2 position of the D gear, and enabling the vehicle to enter a crawling advancing mode.
The gear is in R gear: no P gear request and no gun inserting signal are generated, and the vehicle is in a high-voltage state; and the gear knob is rotated to the N gear, and the vehicle enters a neutral gear sliding mode from a crawling reversing mode until the vehicle is in a static state.
The gears are in a D gear, an N gear or an R gear: when a P gear request is made, or the vehicle is in high pressure, or a gun inserting signal is made, the gear knob presses the P gear, and the vehicle enters a static state.
The gear is in gear D: no P gear request and no gun inserting signal are generated, and the vehicle is in a high-voltage state; the gear knob is rotated to the L2 gear.
The gear is in gear D: no P gear request and no gun inserting signal exist, and the vehicle is in a high-voltage state; and the gear knob is rotated to the N gear, and the vehicle enters a neutral gear sliding mode from a crawling forward mode until the vehicle is in a static state.
The gear is in N gear: no P gear request and no gun inserting signal are generated, and the vehicle is in a high-voltage state; and (4) rotating the gear knob to the R gear, and enabling the vehicle to enter a crawling reversing mode from a static state.
The second technical scheme adopted by the invention is as follows:
according to the control method for the gear management of the pure electric vehicle, the rotating part of the gear knob of the pure electric vehicle comprises five gears, namely L1 and R1 of N gear; l2 in the R gear; r2 in gear D; and an intermediate position; the center of the gear knob is a gear P; the method is characterized in that: when the vehicle speed is not in the range of-2 km/h < V <2km/h, the vehicle is considered to be in a moving state, and the gear conversion conditions are as follows: the gear is in the R gear, the vehicle speed is greater than-5 km/h, the brake is stepped on, and the gear knob rotates to the R2 gear.
The gear is in R gear or N gear: the vehicle is in a high-pressure state, the speed of the vehicle is greater than-5 km/h, the brake is stepped on, the gear knob is rotated to the R2 (D) gear, and the vehicle enters a forward mode from a reverse mode or a neutral sliding mode.
And the gear knob is screwed to the N gear, or the vehicle is at high pressure, or the vehicle speed is less than-5 km/h, and the gear knob is screwed to the R2 (D) gear, so that the vehicle is in a static state or in a sliding mode and enters a forward mode.
The gear is in N gear: the speed of the vehicle is less than 5km/h, the vehicle is in a high-pressure state, the brake is stepped on, the gear knob is rotated to the L2 (R) gear, and the vehicle is in a static state or a sliding mode and enters a reversing mode. .
The gear is in a gear D: when the vehicle speed is less than 5km/h, a brake is stepped on, the gear knob is rotated to the L2 (R) gear, and the vehicle enters a reverse mode from a forward mode.
The gear is in gear D: and (3) turning the gear knob to an N gear, or stepping on a brake when the vehicle speed is less than 5km/h, turning the gear knob to an L2 (R) gear, and enabling the vehicle to enter a reverse mode from a forward mode.
By adopting the technical scheme, the gear to be currently positioned in the P/R/N/D is judged according to the position of the gear shifter and the working condition of the whole vehicle; the motion of each power component is coordinated, and the normal operation of the electric automobile is ensured through gear management.
Drawings
Brief description of the drawings:
FIG. 1 is a circuit diagram of the shifter and VCU of the present invention transmitting signals through a hard-wired connection;
FIG. 2 is a schematic view of the gear knob of the present invention;
FIG. 3 is a schematic illustration of a transition condition for the present invention with the vehicle considered stationary;
fig. 4 is a schematic view of a transition condition in which the vehicle is considered to be in motion by the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be given in order to provide those skilled in the art with a more complete, accurate and thorough understanding of the inventive concept and technical solutions of the present invention.
The structure of the invention as shown in fig. 2 is a control method for gear management of a pure electric vehicle, wherein a rotating part of a gear knob of the pure electric vehicle comprises five gears which are respectively a middle position, and an L1 gear of an N gear and an L2 gear of an R gear are sequentially arranged on the left side of the middle position; and the right side of the middle position is sequentially provided with an R1 gear of the N gear and an R2 of the D gear.
Introduction of functions: judging which gear in P/R/N/D should be located currently according to the position of the gear shifter and the working condition of the whole vehicle; the gear shifter adopts a three-gear five-position type.
And (3) control strategy: the shifter and the VCU transmit signals through a hard-wired connection. The circuit diagram is shown in fig. 1.
The shifter pin definition is shown in table 1 below:
TABLE 1
| PIN numbering | Description of functions | Rated current | I min (A) | I max (A) | Type of signal | Injection allocation |
| B1 | IGN | 500MA | 400MA | 600MA | Power supply | DC+12V |
| B2 | SW1 | 15MA | 10MA | 20MA | Output | Signal pin |
| B3 | SW2 | 15MA | 10MA | 20MA | Output | Signal pin |
| B4 | SW3 | 15MA | 10MA | 20MA | Output | Signal pin |
| B5 | SW4 | 15MA | 10MA | 20MA | Output | Signal pin |
| B6 | GND | 500MA | 400MA | 600MA | Ground wire | Power ground |
| B7 | LED+ | 200MA | 160MA | 300MA | Power supply | Backlight cover |
The signal type is a power supply, and remarks are DC +12V; logic state 1 represents the voltage: 8V-16V, logic state 0 represents the voltage: 0V to 1.5V, and the output definition is shown in Table 2 below:
TABLE 2
| Gear position | SW1 | SW2 | SW3 | SW4 |
| P | 0 | 1 | 0 | 1 |
| Intermediate position | 0 | 1 | 1 | 0 |
| Left hand slight rotation(N) | 0 | 1 | 1 | 1 |
| Left-handed rotation (R) | 1 | 1 | 0 | 0 |
| Right spinning (N) | 1 | 0 | 1 | 0 |
| Right rotating (R) | 1 | 0 | O | 1 |
SW1 to SW4 denote hard line signals, and B1 to B4 denote VCU package PIN PIN numbers. FIG. 1 shows a diagram of the transfer of signals between the gear selector and the VCU via a hard wire connection
The gear knob is schematically shown in fig. 2.
In order to solve the problems in the prior art and overcome the defects of the prior art, and achieve the purpose of ensuring safe gear switching and normal running of the whole vehicle through gear strategy adjustment and gear redesign, the invention adopts the technical scheme that:
as shown in fig. 3, the control method for gear management of the pure electric vehicle of the present invention is characterized in that: when the vehicle speed is in the range of-2 km/< V <2km/h, the vehicle is considered to be in a static state, and the gear shifting conditions are as follows: the gear is in P gear or R gear or N gear: no P gear request and no gun inserting signal are generated, and the vehicle is in a high-voltage state; and (5) stepping on the brake, and rotating the gear knob to the R2 position of the D gear.
A static state:
when the vehicle speed is in the range of-2 km/< V <2km/h, the vehicle is considered to be in a stationary state, and the transition conditions are as shown in fig. 3.
And when the vehicle is changed from a static state to a moving state, the vehicle is switched according to the gear switching relation of the moving state.
And the vehicle only allows the switching between the P gear and the N gear under the non-high pressure state.
The vehicle is static: detecting a gun inserting signal, and automatically locking a P gear through a VCU;
the gear is in R gear: no P gear request and no gun inserting signal are generated, and the vehicle is in a high-voltage state; the gear knob is rotated to N gears.
The gears are in a D gear, an N gear or an R gear: when a P gear request is made, or the vehicle is in high voltage, or a gun inserting signal is made, the gear knob presses the P gear.
The gear is in gear D: no P gear request and no gun inserting signal are generated, and the vehicle is in a high-voltage state; the gear knob is rotated to the L2 gear;
the gear is in gear D: no P gear request and no gun inserting signal are generated, and the vehicle is in a high-voltage state; the gear knob rotates to N gears.
The gear is in N gear: no P gear request and no gun inserting signal are generated, and the vehicle is in a high-voltage state; the gear knob rotates to the R gear.
As shown in fig. 4, the second technical solution adopted by the present invention is:
according to the control method for the gear management of the pure electric vehicle, the rotating part of the gear knob of the pure electric vehicle comprises five gears, namely L1 and R1 of N gear; l2 in the R gear; r2 in gear D; and an intermediate position; the center of the gear knob is a gear P; the method is characterized in that: when the vehicle speed is not in the range of-2 km/h < V <2km/h, the vehicle is considered to be in a moving state, and the gear conversion conditions are as follows: the gear is in the R gear, the vehicle speed is greater than-5 km/h, the brake is stepped on, and the gear knob rotates to the R2 gear.
2. And (3) motion state:
when the vehicle speed is not in the range of-2 km/h < V <2km/h, the vehicle is considered to be in motion, and the transition condition is as shown in fig. 4. When the vehicle changes from the moving state to the static state, the gear switching relation of the static state is carried out. The vehicle speed can be calibrated by N-D, N-R, D-R and R-D.
Vehicle motion:
(1) Detecting a gun inserting signal, and keeping the original gear unchanged (torque limit);
(2) And not responding to the P gear request:
VCU startup status: the VCU restarts: if the vehicle is in a static state, the default gear is P gear; if the vehicle is in a moving state, the default gear is N gear.
The gears are in R gear or N gear: the vehicle is in a high-pressure state, the speed of the vehicle is greater than-5 km/h, the brake is stepped on, and the gear knob rotates to the R2 gear.
And the gear knob is screwed to the N gear, or the vehicle runs at high pressure, or the vehicle speed is less than-5 km/h, and the gear knob is screwed to the R2 gear.
The gear is in N gear: when the vehicle speed is less than 5km/h, the vehicle is in a high-pressure state, the brake is stepped on, and the gear knob is rotated to the L2 gear.
The gear is in a gear D: when the vehicle speed is less than 5km/h, the brake is stepped on, and the gear knob rotates to the L2 gear.
The gear is in a gear D: and (4) stepping on a brake when the gear knob is rotated to an N gear, or the vehicle speed is less than 5km/h, and rotating the gear knob to an L2 gear.
The technical scheme is adopted under different expression conditions. "or" indicates that only one of the conditions is satisfied, "and" indicates that the requirements are satisfied at the same time.
The invention relates to a correlation signal:
gear box Position bisplay (P/R/N/D) (gear display);
vehicle Speed V So Sig (vehicle Speed signal);
brake-state (brake signal).
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (10)
1. A control method for gear management of a pure electric vehicle is characterized in that a rotating part of a gear knob of the pure electric vehicle comprises five gears which are respectively a middle position, and an L1 gear of an N gear and an L2 gear of an R gear are sequentially positioned on the left side of the middle position; the right side of the middle position is sequentially provided with an R1 gear of the N gear and an R2 of the D gear; the method is characterized in that: when the vehicle speed is in the range of-2 km/< V <2km/h, the vehicle is considered to be in a static state, and the gear conversion conditions are as follows: the gears are in P gear, R gear or N gear: no P gear request and no gun inserting signal are generated, and the vehicle is in a high-voltage state; and (5) stepping on the brake, and rotating the gear knob to the R2 position of the D gear.
2. The control method for gear management of the pure electric vehicle according to claim 1, characterized in that: the gear is in R gear: no P gear request and no gun inserting signal are generated, and the vehicle is in a high-voltage state; the gear knob is rotated to N gears.
3. The control method for gear management of the pure electric vehicle according to claim 1, characterized in that: the gears are in a D gear, an N gear or an R gear: when a P gear request is made, or a vehicle is in high pressure, or a gun inserting signal is sent, the gear knob presses the P gear.
4. The control method for gear management of the pure electric vehicle according to claim 1, characterized by comprising the following steps: the gear is in a gear D: no P gear request and no gun inserting signal exist, and the vehicle is in a high-voltage state; the gear knob is rotated to the L2 gear.
5. The control method for gear management of the pure electric vehicle according to claim 1, characterized by comprising the following steps: the gear is in a gear D: no P gear request and no gun inserting signal exist, and the vehicle is in a high-voltage state; the gear knob rotates to N gears.
6. The control method for gear management of the pure electric vehicle according to claim 1, characterized by comprising the following steps: the gear is in N gear: no P gear request and no gun inserting signal are generated, and the vehicle is in a high-voltage state; the gear knob rotates to the R gear.
7. A control method for gear management of a pure electric vehicle is characterized in that a rotating part of a gear knob of the pure electric vehicle comprises five gears, namely L1 and R1 of N gears; l2 in the R gear; r2 of the D gear; and an intermediate position; the center of the gear knob is a gear P; the method is characterized in that: when the vehicle speed is not in the range of-2 km/h < V <2km/h, the vehicle is considered to be in a moving state, and the gear conversion conditions are as follows: the gear is in the R gear, the vehicle speed is greater than-5 km/h, the brake is stepped on, and the gear knob rotates to the R2 gear.
8. The control method for gear management of the pure electric vehicle according to claim 7, characterized by comprising the following steps: the gears are in R gear or N gear: the vehicle is in a high-pressure state, the speed of the vehicle is greater than-5 km/h, the brake is stepped on, and the gear knob rotates to the R2 gear.
9. The control method for gear management of the pure electric vehicle according to claim 7, characterized in that: and the gear knob is rotated to the N gear, or the high pressure is generated under the vehicle, or the vehicle speed is less than-5 km/h, and the gear knob is rotated to the R2 gear.
10. The control method for gear management of the pure electric vehicle according to claim 7, characterized by comprising the following steps: the gear is in N gear: when the vehicle speed is less than 5km/h, the vehicle is in a high-pressure state, the brake is stepped on, and the gear knob is rotated to the L2 gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211137498.7A CN115523288A (en) | 2022-09-19 | 2022-09-19 | Control method for gear management of pure electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211137498.7A CN115523288A (en) | 2022-09-19 | 2022-09-19 | Control method for gear management of pure electric vehicle |
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| Publication Number | Publication Date |
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| CN115523288A true CN115523288A (en) | 2022-12-27 |
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| CN202211137498.7A Pending CN115523288A (en) | 2022-09-19 | 2022-09-19 | Control method for gear management of pure electric vehicle |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108454459A (en) * | 2018-01-26 | 2018-08-28 | 北京新能源汽车股份有限公司 | A kind of shift control method, device and electric vehicle |
| CN108859866A (en) * | 2018-06-28 | 2018-11-23 | 北京新能源汽车股份有限公司 | A kind of emergency braking pre-warning and control method, device and automobile |
| CN110271441A (en) * | 2019-05-31 | 2019-09-24 | 上海思致汽车工程技术有限公司 | A kind of new-energy automobile shift parking control system |
| CN113062976A (en) * | 2021-03-24 | 2021-07-02 | 江铃汽车股份有限公司 | Gear shifting control and gear display method for multi-stable electronic gear shifter of whole vehicle |
| CN113700849A (en) * | 2021-09-07 | 2021-11-26 | 奇瑞商用车（安徽）有限公司 | Automobile gear shifting control method and gear shifting system |
-
2022
- 2022-09-19 CN CN202211137498.7A patent/CN115523288A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108454459A (en) * | 2018-01-26 | 2018-08-28 | 北京新能源汽车股份有限公司 | A kind of shift control method, device and electric vehicle |
| CN108859866A (en) * | 2018-06-28 | 2018-11-23 | 北京新能源汽车股份有限公司 | A kind of emergency braking pre-warning and control method, device and automobile |
| CN110271441A (en) * | 2019-05-31 | 2019-09-24 | 上海思致汽车工程技术有限公司 | A kind of new-energy automobile shift parking control system |
| CN113062976A (en) * | 2021-03-24 | 2021-07-02 | 江铃汽车股份有限公司 | Gear shifting control and gear display method for multi-stable electronic gear shifter of whole vehicle |
| CN113700849A (en) * | 2021-09-07 | 2021-11-26 | 奇瑞商用车（安徽）有限公司 | Automobile gear shifting control method and gear shifting system |
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