CN114704627A - Self-adaptive control method of automatic transmission - Google Patents
Self-adaptive control method of automatic transmission Download PDFInfo
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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
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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
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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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Abstract
An automatic transmission self-adaptive control method belongs to the technical field of automatic transmissions. On the basis of the existing self-adaptive control technology, comprehensive overall consideration is carried out, a set of complete self-learning implementation and compensation management mechanism is established, the driving comfort of the vehicle is further improved, and the durability of the product is ensured. The method comprises the following steps: s1, inputting a current driving condition signal into a self-adaptive coordinator; s2, finding out the worst element by the self-adaptive coordinator and selecting the current most suitable self-adaptive method from the self-adaptive method library; s3, transmitting a control instruction to a gear shifting element control module by an adaptive method triggered by an adaptive coordinator, and then transmitting acquired data to an adaptive evaluator by the adaptive method; and S4, summarizing the oil filling time, the torque transmission point and the torque pressure curve obtained by the worst element in the self-adaptive estimator S2 by using a corresponding self-adaptive method, and compensating the obtained compensation value to preset control data of the element in the gear shifting element control module after processing.
Description
Technical Field
The invention belongs to the technical field of automatic transmissions, and particularly relates to an automatic transmission self-adaptive control method.
Background
Automatic transmission vehicles are becoming the mainstream of the market today, and manufacturing variations and aging of automatic transmissions have to be compensated for by adaptation, which adversely affects the shift control process.
However, the existing automatic transmission still has the problem of poor effect.
Disclosure of Invention
The invention aims to solve the problems in the prior art and further provides an automatic transmission self-adaptive control method, which is characterized in that comprehensive overall consideration is carried out on the basis of the existing self-adaptive control technology, a set of complete self-learning implementation and compensation management mechanism is established, the driving comfort of a vehicle is further improved, and the durability of a product is ensured.
The technical scheme adopted by the invention is as follows:
an adaptive control method of an automatic transmission, comprising the steps of:
s1, inputting a current driving condition signal into a self-adaptive coordinator;
s2, finding the worst element (clutch/brake) by the adaptive coordinator and selecting the currently most suitable adaptive method from an adaptive method library;
s3, the self-adaptive method triggered by the self-adaptive coordinator transmits the control instruction to the gear shifting element control module, then the self-adaptive method transmits the acquired data to the self-adaptive evaluator,
and S4, summarizing the oil filling time, the torque transmission point and the torque pressure curve obtained by the worst element in the self-adaptive estimator S2 by using a corresponding self-adaptive method, and compensating the obtained compensation value to preset control data of the element in the gear shifting element control module after processing.
Compared with the prior art, the invention has the following beneficial effects:
on the basis of the self-adaptive control technology, the driving comfort of the vehicle can be further improved, and the durability of the product is ensured.
Drawings
FIG. 1 is a diagram of the overall control framework of the present invention;
FIG. 2 is a block diagram of the input output relationship of the adaptive coordinator of the present invention;
FIG. 3 is a schematic diagram of a method for processing compensation values of a torque pressure curve in an adaptive estimator according to the present invention.
Detailed Description
For a better understanding of the objects, structure and function of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.
Referring to fig. 1 to 3, the self-adaptive control method of an automatic transmission according to the present invention includes the steps of:
s1, inputting a current driving condition signal into a self-adaptive coordinator;
s2, finding out the worst element by the self-adaptive coordinator and selecting the current most suitable self-adaptive method from the self-adaptive method library; wherein: the elements include clutches and brakes.
S3, transmitting a control instruction to a gear shifting element control module by an adaptive method triggered by an adaptive coordinator, and then transmitting acquired data to an adaptive evaluator by the adaptive method;
and S4, summarizing oil filling time, torque transmission points and torque pressure curves obtained by the worst element in the self-adaptive evaluator S2 by using a corresponding self-adaptive method, processing the curves, and compensating the obtained compensation value to preset control data of the element in the gear shifting element control module.
Wherein: the self-adaptive coordinator is essentially a state machine and decides how to carry out self-adaptive control according to the input of a current driving condition signal;
as shown in FIG. 2, the input information to the adaptive coordinator includes vehicle state, engine torque/speed, clutch/hydraulic element state, gear shift anticipation, and road information.
The role of the adaptive coordinator:
1. finding the worst executing element (clutch/brake) according to the deviation condition of the previous gear shifting control and the target, and preferentially starting the adaptive control of the executing element when the condition is met; after each shift control is stabilized, adaptive control is performed on each actuator at regular intervals of a driving cycle under the condition that the condition is satisfied, so as to acquire the latest control data in the current state.
2. And selecting the most suitable adaptive method from the adaptive method library.
3. If the adaptive control conditions are no longer met, the vehicle condition is approaching a shift line and a shift is imminent, or an unexpected event occurs, the current adaptive control is terminated.
The output of the adaptive coordinator is an adaptive method trigger.
The adaptive coordinator comprises the following judgment logic:
for example: and (4) performing steady-state gear learning on all gear shifting elements in the first driving cycle under the whole vehicle state. And then performing steady state gear learning on all the gear shifting elements according to the set driving cycle/mileage. When various conditions are satisfied, the control pressure command is compensated according to the deviation condition of the actual gear shifting control result and the set target parameter during gear shifting.
The self-adaptive method library comprises self-adaptive control modes suitable for various working conditions, and mainly comprises three types of gear shifting, in-situ static and steady gear driving, wherein:
method of adaptation in a gear shift regime, comprising
1. An inertia phase self-adaptive method comprises the following steps: the method is used for compensating a torque pressure curve of a combined element, and comprises the steps of comparing an original set value with an actual control value according to an input torque and an average control pressure instruction in an inertia phase in the power upshift process, and adjusting the torque pressure curve preset by a combined element;
the method specifically comprises the following steps: when the actual pressure instruction corresponding to the current input torque in the actual control is smaller than the set pressure instruction under the current input torque, the pressure value of the corresponding torque part in the set torque-pressure curve is adjusted downwards; and when the actual pressure instruction corresponding to the current input torque in the actual control is larger than the set pressure instruction under the current input torque, adjusting the pressure value of the corresponding torque part in the set torque-pressure curve upwards.
2. Element bonding adaptive method: the method is used for compensating the combination torque transmission point of the combination element and comprises the steps of identifying the clutch torque transmission point of the combination element according to the change of the rotating speed of the turbine in the gear shifting in the static gear shifting in situ, comparing the time from the end of the originally set oil charging stage to the change of the rotating speed of the turbine, increasing the set pressure of the torque transmission point if the actual time is longer than the target time, and reducing the set pressure of the torque transmission point if the actual time is shorter than the target time.
3. The self-adaptive method for gear shifting and oil filling comprises the following steps: the step of compensating the oil filling time of the combination element is that the oil filling time of the combination element is compensated according to the reduction of the turbine rotating speed in the oil filling stage when the gear shifting is started;
the method specifically comprises the following steps: and for any upshifting process and unpowered downshifting, when the turbine rotating speed is detected to fall down after the oil filling stage or a certain time after the oil filling stage, the oil filling time of the preset combination element is reduced.
4. The torque phase time self-adaptive method comprises the following steps: for compensating the torque pressure curve of the coupling element, the steps are that for the sequential gear shifting of the torque and the rotating speed, the preset torque pressure curve of the coupling element is adjusted according to the torque phase completion time;
the method specifically comprises the following steps: when the torque phase completion time is greater than the preset target time, upwards adjusting the pressure value of the corresponding torque part in the set torque-pressure curve; and when the torque phase completion time is less than the preset target time, adjusting the pressure value of the corresponding torque part in the set torque-pressure curve downwards.
5. The self-adaptive method of the preparation stage comprises the following steps: the method is used for compensating a torque transmission point of a combination element and a torque pressure curve of a separation element, and comprises the steps of compensating the torque transmission point of the combination element by dropping the rotating speed of a turbine in a preparation stage before the start of torque exchange in a gear shifting process of power upshift, and reducing the set pressure of the torque transmission point of the combination element when the rotating speed of the turbine drops too early; the torque pressure curve of the separating element is compensated by the rising of the rotating speed of the turbine, and when the rotating speed of the turbine rises too early (flying), the pressure value of the torque part corresponding to the torque part in the torque-pressure curve set by the separating element is adjusted upwards.
Adaptive method in stationary in-place conditions, comprising
6. Second element join adaptation method: and compensating the torque transmission point of the combined element, namely, slowly combining one element under the condition that the other element is combined, identifying the torque transmission point of the combined element according to the reduction change of the rotating speed of the turbine, and taking the control pressure command of the slowly combined element when the rotating speed of the turbine is reduced as the torque transmission point.
7. The second element oil charge self-adaptive method comprises the following steps: the method is used for compensating the oil filling time of the combination element, and comprises the steps of combining one element with the other element to fill oil under the condition that the other element is combined, identifying the oil filling time of the combination element according to the reduction change of the turbine rotating speed, and taking the time from the beginning of oil filling of the element to the change of the turbine rotating speed as the oil filling time.
8. The N gear combines a certain element self-adaptive method: and compensating the torque transmission point of the combined element, namely, under the condition that no element is combined, slowly combining a certain element selected by the self-adaptive coordinator, identifying the torque transmission point of the combined element according to the reduction change of the rotating speed of the turbine, and taking the slowly combined element control pressure command as the torque transmission point when the rotating speed of the turbine is reduced.
9. In-gear separation of certain element self-adaptive method: the method is used for compensating the torque transmission point of the separation element, and comprises the steps of stepping a brake in situ under a gear state, identifying the torque transmission point of the separation element according to the rising change of the rotating speed of the turbine by a certain element selected by the self-adaptive coordinator in separation combination according to the gear, and using the control pressure command of the element slowly separated when the rotating speed of the turbine rises as the torque transmission point.
Adaptive method in steady state gear driving condition, comprising
10. The third element incorporates an adaptive method: the method is used for compensating the torque transmission point of the combination element, and comprises the steps of slowly combining a third element under a steady state gear, identifying the torque transmission point of the combination element according to the reduction change of the rotating speed of the turbine, and using the slowly combined element control pressure command as the torque transmission point when the rotating speed of the turbine is reduced.
11. The self-adaptive method of the viscous point comprises the following steps: the method is used for compensating the torque pressure curve, and comprises the steps that under a steady-state gear, a certain element selected by an adaptive coordinator according to a gear in separation combination compensates the torque pressure curve of the separation element according to the rising change of the rotating speed of the turbine, controls a pressure command for the slowly separated element when the rotating speed of the turbine rises, and compensates the torque-pressure curve according to the input torque;
12. the micro-sliding self-adaptive method comprises the following steps: the method is used for compensating the torque-pressure curve, and comprises the steps of slowly reducing certain element pressure selected by an adaptive coordinator according to gears in combination under a steady-state gear until the element has slight speed slippage and is kept for a period of time, and compensating the element torque-pressure curve according to the actual engine torque and element pressure control value at the moment.
13. The third element oil filling self-adaptive method comprises the following steps: the method is used for compensating the oil filling time of the combination element and comprises the steps that under a steady-state gear, the third element is filled with oil, and the time from the beginning of oil filling of the element to the time when the rotating speed of the turbine changes is used as the oil filling time according to the oil filling time of the rotating speed reduction change identification element of the turbine.
And thirdly, the self-adaptive evaluator summarizes the oil filling time, the torsion point and the torque pressure curve of each element obtained by different self-adaptive methods, processes the curves and compensates the curves to preset control data.
1. A method of oil fill time compensation for an adaptive evaluator, comprising the steps of:
step one, comparing the oil filling time obtained by the worst element in the S2 by using a self-adaptive method with the preset oil filling time;
step two, obtaining a deviation value, removing a value with larger deviation after the number of the deviation value data is accumulated to a certain degree, and averaging the remaining deviation values to be used as a compensation value of the oil filling time of the element;
and step three, limiting the storage space of the TCU, discarding the oldest value when the number of the stored deviation values reaches the upper storage limit, and adding the latest deviation value into the storage queue.
An adaptive coordinator, an adaptive method library, an adaptive evaluator, and a shift element control module, all of which are programs internal to the TCU.
2. The method for compensating the transmission torsion point of the adaptive estimator comprises the following steps:
step one, comparing the worst element in S2 with a preset torque transmission point by using a torque transmission point obtained by a self-adaptive method;
and step two, acquiring a deviation value, removing a larger deviation value after the number of the deviation value data is accumulated to a certain degree, and averaging the remaining deviation values to be used as a compensation value of the element torsion transmission point.
And step three, limiting the storage space of the TCU, discarding the oldest value when the number of the stored deviation values reaches the upper storage limit, and adding the latest deviation value into the storage queue.
3. A method of torque pressure curve compensation for an adaptive estimator, comprising the steps of:
step one, comparing a torque pressure curve obtained by a self-adaptive method with a preset torque pressure curve of the worst element in S2 to obtain a deviation value;
dividing the whole torque pressure deviation curve into a plurality of groups according to different torques, subdividing the lower surface of each group into a plurality of torque intervals, and setting different numbers of the torque intervals in each group based on actual requirements;
step three, independently storing torque pressure deviation value data for each group;
step four, when the number of the deviation value data in a certain group is accumulated to a certain degree, removing the value with larger deviation, and compensating the deviation data on the two end points of the torque interval by using a linear interpolation method for the rest deviation values according to different torque intervals;
step five, finally splicing the deviation curves of all the groups together, and taking the spliced deviation curves as compensation values of the torque-pressure curves of the element after smooth processing;
and step six, the deviation value is limited by the storage space of the TCU of the transmission controller, when the number of the stored deviation values reaches the upper storage limit, the oldest value is abandoned, and the newest deviation value is added into the storage queue. (as shown in FIG. 3)
In summary, the adaptive coordinator is used to decide which element to adaptively adjust and select which appropriate method.
Adaptive control may be implemented in the following cases: steady state gear driving, stationary in place, shifting.
The torque pressure curve, the torque transmission point and the oil filling time of the element should be used as compensation quantities for adaptive control, but compensation for other control variables can also be considered.
The acquired deviation data needs to be screened before application.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (8)
1. An adaptive control method of an automatic transmission, characterized by: the method comprises the following steps:
s1, inputting a current driving condition signal into a self-adaptive coordinator;
s2, finding out the worst element by the self-adaptive coordinator and selecting the current most suitable self-adaptive method from the self-adaptive method library;
s3, the self-adaptive method triggered by the self-adaptive coordinator transmits the control instruction to the gear shifting element control module, then the self-adaptive method transmits the acquired data to the self-adaptive evaluator,
and S4, summarizing the oil filling time, the torque transmission point and the torque pressure curve obtained by the worst element in the self-adaptive estimator S2 by using a corresponding self-adaptive method, and compensating the obtained compensation value to preset control data of the element in the gear shifting element control module after processing.
2. The adaptive control method for an automatic transmission according to claim 1, characterized in that: in S1, the input information of the adaptive coordinator includes vehicle state, engine torque/speed, clutch/hydraulic element state, gear shift prediction and road information.
3. The adaptive control method for an automatic transmission according to claim 1, characterized in that: the self-adaptive method library in the S2 comprises self-adaptive control methods under three working conditions of gear shifting, in-situ static and steady gear driving; wherein:
method of adaptation in a gear shift regime, comprising
An inertia phase self-adaptive method comprises the following steps: the method is used for compensating a torque pressure curve of a combined element, and comprises the steps of comparing an original set value with an actual control value according to an input torque and an average control pressure instruction in an inertia phase in the power upshift process, and adjusting the torque pressure curve preset by a combined element;
element bonding adaptive method: the method is used for compensating the combination torque transmission point of the combination element, and comprises the steps of identifying the torque transmission point of the combination element according to the change of the rotating speed of a turbine in gear shifting in static gear shifting in situ, comparing the time from the end of an originally set oil filling stage to the actual oil filling stage to the change of the rotating speed of the turbine, and adjusting the set pressure of the torque transmission point;
the self-adaptive method for gear shifting and oil filling comprises the following steps: the method is used for compensating the oil filling time of the combination element, and comprises the steps of compensating the oil filling time of the combination element according to the reduction of the turbine rotating speed in the oil filling stage when the gear shifting is started;
the torque phase time self-adaptive method comprises the following steps: for compensating the torque pressure curve of the coupling element, the steps are that for the sequential gear shifting of the torque and the rotating speed, the preset torque pressure curve of the coupling element is adjusted according to the torque phase completion time;
the self-adaptive method of the preparation stage comprises the following steps: the method is used for compensating a torque transmission point of a combination element and a torque pressure curve of a separation element, and comprises the steps of compensating the torque transmission point of the combination element by using the rotating speed of a turbine in a preparation stage before the torque exchange begins in the gear shifting process of power upshift; the turbine speed rise is used to compensate for the disconnect element torque pressure curve.
4. An adaptive control method for an automatic transmission according to claim 3, characterized in that: the adaptive method in the static in-place working condition in S2 comprises
Second element bonding adaptive method: the method is used for compensating the torque transmission point of the combined element, and comprises the steps of slowly combining one element under the condition that the other element is combined, identifying the torque transmission point of the combined element according to the reduction change of the rotating speed of the turbine, and taking the control pressure command of the slowly combined element as the torque transmission point when the rotating speed of the turbine is reduced;
the second element oil charge self-adaptive method comprises the following steps: the method is used for compensating the oil filling time of the combination element, and comprises the steps of combining one element with another element to fill oil under the condition that the other element is combined, identifying the oil filling time of the combination element according to the reduction change of the rotating speed of the turbine, and taking the time from the beginning of oil filling of the element to the change of the rotating speed of the turbine as the oil filling time;
the N gear combines a certain element self-adaptive method: the method is used for compensating the torque transmission point of the combined element, and comprises the steps of slowly combining a certain element selected by the self-adaptive coordinator under the condition that no element is combined, identifying the torque transmission point of the combined element according to the reduction change of the rotating speed of the turbine, and taking the slowly combined element control pressure command as the torque transmission point when the rotating speed of the turbine is reduced;
in-gear separation of certain element self-adaptive method: the method is used for compensating the torque transmission point of the separation element, and comprises the steps of stepping a brake in situ under a gear state, identifying the torque transmission point of the separation element according to the rising change of the rotating speed of the turbine by a certain element selected by the self-adaptive coordinator in separation combination according to the gear, and using the control pressure command of the element slowly separated when the rotating speed of the turbine rises as the torque transmission point.
5. An adaptive control method for an automatic transmission according to claim 3, characterized in that: the method for adapting to the driving condition of the steady-state gear in the step S2 comprises
The third element incorporates an adaptive method: the method is used for compensating the torque transmission point of the combination element, and comprises the steps of slowly combining a third element under a steady state gear, identifying the torque transmission point of the combination element according to the reduction change of the rotating speed of the turbine, and using the slowly combined element control pressure command as the torque transmission point when the rotating speed of the turbine is reduced;
the self-adaptive method of the viscous point comprises the following steps: the method is used for compensating the torque pressure curve, and comprises the steps that under a steady-state gear, a certain element selected by an adaptive coordinator according to a gear in separation combination compensates the torque pressure curve of the separation element according to the rising change of the rotating speed of the turbine, controls a pressure command for the slowly separated element when the rotating speed of the turbine rises, and compensates the torque-pressure curve according to the input torque;
the micro-sliding self-adaptive method comprises the following steps: the method is used for compensating the torque-pressure curve, and comprises the steps of slowly reducing the pressure of a certain element selected by an adaptive coordinator according to a gear in combination under a steady-state gear until the element has slight speed slippage and is kept for a period of time, and compensating the torque-pressure curve of the element according to the actual engine torque and the element pressure control value at the moment;
the third element oil filling self-adaptive method comprises the following steps: the method is used for compensating the oil filling time of the combination element, and comprises the steps of combining the oil filling of a third element under a steady state gear, identifying the oil filling time of the element according to the reduction change of the turbine speed, and taking the time from the beginning of oil filling of the element to the change of the turbine speed as the oil filling time.
6. The adaptive control method for an automatic transmission according to claim 1, characterized in that: the oil filling time compensation method for the adaptive estimator in the S4 comprises the following steps:
step one, comparing the oil filling time obtained by the worst element in the S2 by using a self-adaptive method with the preset oil filling time;
step two, obtaining a deviation value, removing a value with larger deviation after the number of the deviation value data is accumulated to a certain degree, and averaging the remaining deviation values to be used as a compensation value of the oil filling time of the element;
and step three, limiting the storage space of the TCU, discarding the oldest value when the number of the stored deviation values reaches the upper storage limit, and adding the latest deviation value into the storage queue.
7. The adaptive control method for an automatic transmission according to claim 1, characterized in that: the method for compensating the transmission twist point of the adaptive estimator in the step S4 includes the following steps:
step one, comparing the worst element in S2 with a preset torque transmission point by using a torque transmission point obtained by a self-adaptive method;
and step two, acquiring a deviation value, removing a larger deviation value after the number of the deviation value data is accumulated to a certain degree, and averaging the remaining deviation values to be used as a compensation value of the element torsion transmission point.
And step three, limiting the storage space of the TCU, discarding the oldest value when the number of the stored deviation values reaches the upper storage limit, and adding the latest deviation value into the storage queue.
8. The adaptive control method for an automatic transmission according to claim 7, characterized in that: the method for compensating the torque pressure curve of the adaptive estimator in the S4 comprises the following steps:
step one, comparing a torque pressure curve obtained by a self-adaptive method with a preset torque pressure curve of the worst element in S2 to obtain a deviation value;
dividing the whole torque pressure deviation curve into a plurality of groups according to different torques, subdividing the lower surface of each group into a plurality of torque intervals, and setting different numbers of the torque intervals in each group based on actual requirements;
step three, independently storing torque pressure deviation value data for each group;
step four, when the number of the deviation value data in a certain group is accumulated to a certain degree, removing the value with larger deviation, and compensating the deviation data on the two end points of the torque interval by using a linear interpolation method for the rest deviation values according to different torque intervals;
step five, finally splicing the deviation curves of all the groups together, and taking the spliced deviation curves as compensation values of the torque-pressure curves of the element after smooth processing;
and step six, the deviation value is limited by the storage space of the TCU of the transmission controller, when the number of the stored deviation values reaches the upper storage limit, the oldest value is abandoned, and the newest deviation value is added into the storage queue.
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|---|---|---|---|---|
| CN115750620A (en) * | 2022-11-04 | 2023-03-07 | 东风商用车有限公司 | AMT clutch position control method and device |
| CN117345861A (en) * | 2023-10-09 | 2024-01-05 | 哈尔滨东安汽车发动机制造有限公司 | Control system and method for eliminating impact of automatic transmission under following vehicle condition |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115750620A (en) * | 2022-11-04 | 2023-03-07 | 东风商用车有限公司 | AMT clutch position control method and device |
| CN117345861A (en) * | 2023-10-09 | 2024-01-05 | 哈尔滨东安汽车发动机制造有限公司 | Control system and method for eliminating impact of automatic transmission under following vehicle condition |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114704627B (en) | 2023-05-05 |
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