CN110953335A - Gear shifting self-learning method and automobile - Google Patents
Gear shifting self-learning method and automobile Download PDFInfo
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- CN110953335A CN110953335A CN201911323596.8A CN201911323596A CN110953335A CN 110953335 A CN110953335 A CN 110953335A CN 201911323596 A CN201911323596 A CN 201911323596A CN 110953335 A CN110953335 A CN 110953335A
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- automatic transmission
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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
- F16H61/0213—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 characterised by the method for generating shift signals
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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
- F16H61/04—Smoothing ratio shift
- F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
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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
- F16H2061/0068—Method or means for testing of transmission controls or parts thereof
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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
- F16H2061/0075—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 a particular control method
- F16H2061/0087—Adaptive control, e.g. the control parameters adapted by learning
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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
- F16H61/04—Smoothing ratio shift
- F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
- F16H61/061—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means
- F16H2061/062—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means for controlling filling of clutches or brake servos, e.g. fill time, fill level or pressure during filling
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention provides a gear shifting self-learning method and an automobile, and relates to the technical field of automobiles, wherein the gear shifting self-learning method comprises the following steps: starting a first motor on a rack of an offline detector of a production line, and adjusting an automatic transmission of the automobile to an N gear; the second motor on the platform frame of the offline detector of the production line drives the automatic transmission of the automobile to operate, so that the rotating speed of an input shaft of the automatic transmission is in a first set value; adjusting the oil charging pressure of the clutch to enable the output shaft of the first motor on the rack of the offline detector of the production line to transmit power to the input shaft of the automatic transmission; when the rotation speed of the input shaft of the automatic transmission is changed from a first set value to a second set value, the position information of the clutch at that time is identified as half-junction point information and stored. The automobile adopts a gear shifting self-learning method. The technical effect of saving manpower is achieved.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a gear shifting self-learning method and an automobile.
Background
An automatic transmission is a mechanism for changing the rotational speed and torque from an engine, which can change the transmission ratio of an output shaft and an input shaft by fixing or stepping, and is also called a transmission. The automatic speed variator consists of speed-changing transmission mechanism and control mechanism, and some vehicles also have power output mechanism. The transmission mechanism is mainly driven by common gears and also driven by planetary gears. The common gear transmission mechanism generally uses a sliding gear, a synchronizer and the like.
After the automatic transmission is subjected to off-line testing, the quality of a few automatic transmissions after being loaded is poor, the automatic transmission needs to be restored to be normal after several times of gear shifting self-adaption, and the automatic transmission is qualified. In the prior art, gear shifting self-learning is performed after the whole vehicle is off-line, and the self-learning time is different among vehicles, so that multiple times of learning can be performed. In addition, specific manpower is required to be arranged for self-learning of gear shifting after the whole vehicle is off-line, and redundant manpower and material resources are consumed.
Therefore, it is an important technical problem to be solved by those skilled in the art to provide a gear shifting self-learning method and a vehicle which do not need to perform gear shifting learning independently after being off-line.
Disclosure of Invention
The invention aims to provide a gear shifting self-learning method and an automobile, and aims to solve the technical problem that manpower is consumed when gear shifting learning needs to be carried out independently after the automobile is off line in the prior art.
In a first aspect, an embodiment of the present invention provides a gear shifting self-learning method, including the following steps:
starting a first motor on a rack of an offline detector of a production line, and adjusting an automatic transmission of the automobile to an N gear;
the second motor on the platform frame of the offline detector of the production line drives the automatic transmission of the automobile to operate, so that the rotating speed of an input shaft of the automatic transmission is in a first set value;
adjusting the oil charging pressure of the clutch to enable the output shaft of the first motor on the rack of the offline detector of the production line to transmit power to the input shaft of the automatic transmission;
when the rotation speed of the input shaft of the automatic transmission is changed from a first set value to a second set value, the position information of the clutch at that time is identified as half-junction point information and stored.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the position information of the clutch includes an oil filling pressure value of the clutch.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein a rotation direction of the output shaft of the first motor is opposite to a rotation direction of the input shaft of the automatic transmission.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the first set value is between 720rpm and 780 rpm.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the first set value is 750 rpm.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the second set value is between 20rpm and 30 rpm.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the second set value is 25 rpm.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the information of the half-join points is tested multiple times, and the information is averaged and stored.
With reference to the first aspect, embodiments of the present invention provide a possible implementation manner of the first aspect, wherein the oil charge pressure is increased by 0.05bar each time the oil charge pressure of the clutch is adjusted.
In a second aspect, an embodiment of the invention provides an automobile, and a gear shifting self-learning method is applied to the automobile.
Has the advantages that:
the invention provides a gear shifting self-learning method which comprises the following steps: starting a first motor on a rack of an offline detector of a production line, and adjusting an automatic transmission of the automobile to an N gear; the second motor on the platform frame of the offline detector of the production line drives the automatic transmission of the automobile to operate, so that the input shaft of the automatic transmission is in a first set value to rotate; adjusting the oil charging pressure of the clutch to enable the output shaft of the first motor on the rack of the offline detector of the production line to transmit power to the input shaft of the automatic transmission; when the rotation speed of the input shaft of the automatic transmission is changed from a first set value to a second set value, the position information of the clutch at that time is identified as half-junction point information and stored.
When a half-combination point is tested, a first motor on a rack of a production line offline detector is started, an automatic transmission is adjusted to N gear, a second motor on the rack of the production line offline detector drives an automobile automatic transmission to operate, then the oil charging pressure of a clutch is adjusted, so that the output shaft of the first motor on the rack of the production line offline detector transmits power to the input shaft of the automatic transmission, and the half-combination point information is confirmed and stored when the rotating speed of the input shaft of the automatic transmission is changed from a first set value to a second set value; the automatic transmission is measured and debugged through the offline detector on the production line, the vehicle after offline is ensured to be in the best state, manual measurement after offline is not needed, and manpower is saved.
The invention provides an automobile, which applies a gear shifting self-learning method. The automobile has the advantages compared with the prior art, and the description is omitted.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a shift self-learning method provided by an embodiment of the invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "front", "back", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise explicitly specified or limited, the terms "connected" and the like are to be understood broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
Referring to FIG. 1, the present embodiment provides a gear shifting self-learning method, comprising the steps of: starting a first motor on a rack of an offline detector of a production line, and adjusting an automatic transmission of the automobile to an N gear (neutral gear); the second motor on the platform frame of the offline detector of the production line drives the automatic transmission of the automobile to operate, so that the rotating speed of an input shaft of the automatic transmission is in a first set value; adjusting the oil charging pressure of the clutch to enable the output shaft of the first motor on the rack of the offline detector of the production line to transmit power to the input shaft of the automatic transmission; when the rotation speed of the input shaft of the automatic transmission is changed from a first set value to a second set value, the position information of the clutch at that time is identified as half-junction point information and stored.
When testing the half-combination point of the clutch, starting a first motor on a rack of an offline detector of a production line, enabling an automatic transmission to be in an N gear, driving an automatic transmission of an automobile to operate through a second motor on the rack of the offline detector of the production line, then adjusting oil charging pressure of the clutch, enabling an output shaft of the first motor on the rack of the offline detector of the production line to transmit power to an input shaft of the automatic transmission, and when the rotating speed of the input shaft of the automatic transmission is changed from a first set value to a second set value, confirming the half-combination point information of the clutch and storing the information; the automobile is measured and debugged by the on-line detector of the production line, so that the on-line automobile is in the best state, manual measurement after off-line is not needed, and labor is saved.
Specifically, the automatic transmission is driven to rotate by a second motor on an EOL (End of Line detector), so that the rotation speed of an input shaft of the automatic transmission is at a first set value, and then the oil charging pressure of the clutch is adjusted, so that the first motor on the EOL rack can transmit power to the automatic transmission.
When a driver drives an automobile and needs to shift gears, an Electronic Control Unit (ECU) can Control a clutch according to information of a half-joint point measured by a production line offline detector, the clutch is controlled to cut off power transmission between a first motor and an automatic transmission, and then the gear shifting work of the automatic transmission is completed.
Wherein, when adjustment clutch oil charge pressure, can make the first motor on the production line detector rack of production line transmission power to automatic gearbox gradually, automatic gearbox drives its rotation through outside second motor this moment, consequently when first motor gradually transmits power to automatic gearbox, can change the original rotational speed of automatic gearbox, when the automatic gearbox rotational speed becomes the second setting value, the positional information of clutch was half the binding point this moment in the affirmation.
Specifically, by the method provided by the embodiment, the half-joint point of each automobile clutch can be accurately measured, and the automobile gear shifting is ensured to be in the optimal state, so that a driver does not need to operate the automobile to learn gear shifting after the automobile is sold off line.
It should be noted that the first electric motor on the EOL stage is in driving connection with the input shaft of the clutch, and the second electric motor on the EOL stage is in driving connection with the output shaft of the automatic transmission.
The 'half-joint point' in the embodiment is a characteristic of a clutch joint process, the moment that the clutch overcomes the whole vehicle resistance moment and the vehicle moves from rest is a key point for controlling the clutch, and the corresponding position of the clutch is called as a clutch kisspeint point (half-joint point).
Wherein, before test work, the staff can be connected second motor and automatic gearbox on the production line detector rack that rolls off the production line to drive automatic gearbox through this second motor and rotate.
It should be noted that after the kissetpoint point (half-engagement point) of the clutch is measured, information of the kissetpoint point (half-engagement point) of the clutch is stored in the substrom (memory chip for automatic transmission), and when the driver drives the vehicle to shift gears, the ECU reads the information of the kissetpoint point of the clutch, thereby controlling the clutch to operate.
It is also noted that the air conditioner inside the vehicle is in a closed state while the measurement work is being performed.
In an alternative of this embodiment, the position information of the clutch comprises a value of a fill pressure of the clutch.
Specifically, the position information of the clutch is recorded as an oil filling pressure value of the clutch, the position state of the clutch can be changed by changing the oil filling pressure value of the clutch, when the oil filling pressure is low, the clutch is in a non-linkage state, when the oil filling pressure reaches a certain value, the clutch is at a kisspeint point (a half-combination point), and when the oil filling pressure continues to increase, the clutch is in a full-linkage state.
When the oil filling pressure value of the clutch is adjusted, the pressure value needs to be gradually increased, so that the situation that the first motor cannot transmit power to the automatic transmission from the first motor on the offline detector rack of the production line is changed into the situation that the first motor can transmit power to the automatic transmission, and the kisspeint point (half-combination point) of the clutch is measured.
In an alternative of this embodiment, the output shaft of the first motor rotates in the opposite direction to the input shaft of the automatic transmission.
Specifically, when a worker is measuring a clutch kissponi point (a half-joint point), the worker needs to start a first motor on the EOL rack first to rotate the first motor forward, and then drives the automatic transmission to rotate through a second motor externally arranged on the EOL rack to rotate the automatic transmission backward. With such an arrangement, when the clutch oil charge pressure is adjusted, whether the clutch reaches the kissponi point (half-engagement point) can be clearly known from the clutch rotation speed.
Wherein if the clutch does not reach the kissponi point (half-junction point), the rotation speed of the automatic transmission does not reach the second set value, and if the clutch exceeds the kissponi point (half-junction point), the rotation speed of the input shaft of the automatic transmission is synchronized with the rotation speed of the output shaft of the first motor.
In an alternative of this embodiment, the first set point is between 720rpm and 780 rpm.
Specifically, when measuring, the second motor on the EOL rack drives the automatic transmission to rotate, and the rotating speed of the automatic transmission is between 720rpm and 780 rpm. When the clutch fill pressure is adjusted, the rotational speed of the automatic transmission gradually decreases and rotates in the reverse direction.
The first set value rotating speed of the automatic transmission can be adaptively adjusted according to different types of clutches.
Wherein "rpm" in this embodiment is: rpm (Revolutions Per Minute) represents the number of Revolutions Per Minute of the apparatus.
In an alternative of this embodiment, the first set point is 750 rpm.
Specifically, during measurement, the automatic transmission is driven to rotate by a second motor on the EOL rack, and the rotating speed of the automatic transmission is 750 rpm. When the clutch fill pressure is adjusted, the rotational speed of the automatic transmission gradually decreases and rotates in the reverse direction.
In an alternative of this embodiment, the second set point is between 20rpm and 30 rpm.
Specifically, when the clutch oil filling pressure is adjusted, the power transmitted to the automatic transmission by the first motor on the EOL rack is gradually increased, and the rotating speed of the input shaft of the automatic transmission is reduced from 750rpm in the reverse rotation to 20rpm to 30rpm in the forward rotation.
The second set value rotating speed of the automatic transmission can be adaptively adjusted according to different types of clutches.
In an alternative of this embodiment, the second set point is 25 rpm.
Specifically, when the clutch fill pressure is adjusted, the power transmitted to the automatic transmission by the first motor on the EOL stage is gradually increased, and the rotation speed of the input shaft of the automatic transmission is reduced from 750rpm in the reverse rotation to 25pm in the forward rotation.
In an alternative of this embodiment, the half-join point information is tested multiple times, averaged and stored.
When the kissetpoint point (half-combination point) of the clutch is measured, multiple tests need to be carried out, the average value is taken and stored, and the accuracy of measuring the kissetpoint point (half-combination point) of the clutch is improved.
In an alternative embodiment of the embodiment, the filling pressure is increased by 0.05bar each time the filling pressure of the clutch is adjusted.
Specifically, when the oil charging pressure of the clutch is adjusted, the accuracy of the oil charging pressure of the clutch is improved through the increase of the stable equivalent value.
Specifically, when the measurement work is carried out, the oil filling pressure of the clutch is increased by 0.05bar every time, the precision of a kisspeint point (a half-joint point) of the clutch can be greatly improved, and therefore the gear shifting efficiency of the automobile is improved.
When the oil charging oil pressure of the clutch is adjusted, the oil charging oil pressure can be increased to a third set value, then the oil charging oil pressure of the clutch is adjusted in a mode of increasing 0.05bar every time, the working efficiency of adjusting the oil charging oil pressure of the clutch is improved, and the time is saved.
The preset third set value of the oil filling oil pressure can be adjusted according to different types of clutches. The preset third setting value may be set according to experience of a person skilled in the art, or may be set according to a measurement method. When the third setting value is measured according to the measurement method, according to the gear-shifting self-learning method provided by the embodiment, the oil charge pressure of the clutch is gradually increased by 1bar each time, then the change of the rotating speed of the automatic transmission is observed, and when the rotating speed of the automatic transmission is reduced to be close to zero, the value of the oil charge pressure is the third setting value.
The embodiment provides an automobile applying a gear shifting self-learning method. Compared with the prior art, the automobile has the advantages, and the description is omitted.
The gear shifting self-learning method provided by the embodiment can enable the automobile to perform gear shifting self-learning on the EOL, and measure an accurate clutch kisspeint point (half-combination point), so that each automobile reaches an optimal state when sold, and a driver does not need to manually operate the automobile to perform complicated learning work.
When a driver drives the automatic transmission automobile, the ECU firstly controls the clutch to work to enable the clutch to be at a kiss point (a half-joint point) when the gear shifting work is carried out, so that power transmission between the first motor and the automatic transmission is cut off, then the automatic transmission is controlled to complete speed change work, and finally the clutch is controlled to be in a full-linkage state to enable the first motor to transmit power to the automatic transmission.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A gear shifting self-learning method is characterized by comprising the following steps:
starting a first motor on a rack of an offline detector of a production line, and adjusting an automatic transmission of the automobile to an N gear;
the second motor on the platform frame of the offline detector of the production line drives the automatic transmission of the automobile to operate, so that the rotating speed of an input shaft of the automatic transmission is in a first set value;
adjusting the oil charging pressure of the clutch to enable an output shaft of a first motor on a rack of the offline detector of the production line to transmit power to an input shaft of the automatic transmission;
when the rotation speed of the input shaft of the automatic transmission is changed from a first set value to a second set value, the position information of the clutch at that time is identified as half-junction point information and stored.
2. The shift self-learning method of claim 1, wherein the clutch position information includes a clutch fill pressure value.
3. The shift self-learning method of claim 1 wherein the output shaft of the first electric machine rotates in a direction opposite to the input shaft of the automatic transmission.
4. The shifting self-learning method according to claim 3, wherein the first set point is between 720rpm and 780 rpm.
5. The shifting self-learning method according to claim 4, wherein the first set point is 750 rpm.
6. The shifting self-learning method according to claim 3, wherein the second setpoint is between 20rpm and 30 rpm.
7. The shifting self-learning method according to claim 6, wherein the second set point is 25 rpm.
8. Gear shifting self-learning method according to any of claims 1-7, characterized in that the semi-junction information is tested multiple times, averaged and stored.
9. The shifting self-learning method according to any of claims 1-7, wherein the fill pressure is increased by 0.05bar each time the fill pressure of the clutch is adjusted.
10. A motor vehicle, characterized in that a gear shifting self-learning method according to any of claims 1-9 is applied.
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| CN201911323596.8A CN110953335A (en) | 2019-12-19 | 2019-12-19 | Gear shifting self-learning method and automobile |
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| CN201911323596.8A CN110953335A (en) | 2019-12-19 | 2019-12-19 | Gear shifting self-learning method and automobile |
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| CN113294517A (en) * | 2021-05-31 | 2021-08-24 | 陕西法士特齿轮有限责任公司 | Offline calibration method and device for pressure of KP (pressure relief) point of AT (automatic Transmission) clutch |
| CN113704890A (en) * | 2021-08-31 | 2021-11-26 | 潍柴动力股份有限公司 | Self-learning method, device and computer readable medium for clutch pressure value |
| CN113757357A (en) * | 2020-06-02 | 2021-12-07 | 广州汽车集团股份有限公司 | Oil filling and semi-joint point self-learning method for double-clutch automatic gearbox |
| CN114909466A (en) * | 2021-02-07 | 2022-08-16 | 广汽埃安新能源汽车有限公司 | Vehicle downshift control method and device and storage medium |
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| CN109990015A (en) * | 2017-12-29 | 2019-07-09 | 长城汽车股份有限公司 | The self-learning method of double clutch half hitch chalaza |
Cited By (7)
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