CN111536230A - Static gear shifting control method of automatic gearbox - Google Patents
Static gear shifting control method of automatic gearbox Download PDFInfo
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- CN111536230A CN111536230A CN202010397771.4A CN202010397771A CN111536230A CN 111536230 A CN111536230 A CN 111536230A CN 202010397771 A CN202010397771 A CN 202010397771A CN 111536230 A CN111536230 A CN 111536230A
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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
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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
- F16H2061/0078—Linear control, e.g. PID, state feedback or Kalman
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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)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses a static gear shifting control method of an automatic gearbox, which comprises six stages: the first stage is a quick oil filling stage, full-opening oil filling is adopted, and the hydraulic slide valve is in a maximum oil inlet state; the second stage is a slip starting point control stage, the basic current value is reduced to a certain small value point after the oil filling control of the first stage is completed, and the point is used as the slip starting point of the clutch; the third stage is an adaptive stage; the fourth stage is a sliding grinding stage; the fifth stage is a slow combination stage, a stable current for slowly combining the clutch is provided, and a closed-loop tail end current is used as a basic value; the sixth stage is a stage of increasing the safety coefficient, so that the situation that the clutch is disengaged when the torque rises in the stage, and the impact is caused when the subsequent current rises rapidly to influence the gear shifting quality is avoided; the method effectively avoids adverse effects caused by the problems of oil temperature, consistency and the like, simultaneously ensures a single gear entering process, and improves gear shifting impact in the actual gear entering process.
Description
Technical Field
The invention relates to the field of automatic transmissions of automobiles, in particular to a control method for an AT automatic transmission under a static gear-in working condition.
Background
With the rapid development of electronic technology and automatic control, high-performance automatic transmissions of automobiles are continuously pushed to the market by automobile manufacturers at home and abroad, and the automatic transmission type is approved by people for the relaxed and comfortable feeling in the driving process. As the requirements of customers increase, the subjective feeling is directly affected by the impact existing in the static gear-in process, so that the control of the static gear-in becomes particularly important.
There are various control methods for gear shifting in a static state, and the shift quality varies with the change of the use environment in the actual process, and there is also a shock in individual cases. At present, most of static gear-in clutch control needs to do a large amount of calibration and other verification work according to the oil temperature and consistency problem; because of the difference between mechanical and hydraulic pressure, the common clutch control has a self-learning function, but if the single transmission with slightly larger difference needs a larger self-learning period, the shift quality needs to be continuously adjusted by relying on a successive learning process, and the shift quality cannot be ensured within a longer period of time.
Disclosure of Invention
In order to overcome the defects in the gear entering control process under the existing static condition, the invention aims to provide a gear entering control method with a certain self-adaptive function, and the adverse effects caused by the problems of oil temperature, consistency and the like are effectively avoided.
In order to achieve the purpose, the technical scheme of the invention is as follows: the static shift-in clutch control is mainly divided into six stages.
The first stage is a fast oil filling stage (P1 control stage).
In order to avoid the influence caused by factors such as the rigidity of an electromagnetic valve and a hydraulic slide valve spring, full-opening oil filling is adopted in the oil filling stage, and the hydraulic slide valve is in the maximum oil inlet state, 1000mA is adopted for quick oil filling; the purpose of this stage is to make the oil pocket fill with the lubricating oil fast, the oil charge time at this moment must be suitable, the oil charge time will be very long for too small oil charge time, will result in the impact for too large oil charge time; in order to ensure proper oil filling, the data of the valve plate test bench and the high-low temperature test bench are required to be correspondingly adjusted.
The second stage is the slip start point control (P2 control stage).
The starting point of the sliding grinding is mainly based on the point which is smaller in the rack data and is used as the initial value of the point, and the problem that the self-adaptive function cannot be provided when the starting point of the sliding grinding is smaller because the value is too large is mainly considered.
The third stage is an adaptation stage (P3 control stage).
The main purpose of the P3 stage is to make an approximation of the point of wear, which is not present if the entry into the P4 condition has been met in the P2 stage; the process is a main process for providing the self-adaptive skimming point, and if the skimming starting point value provided by the stage P2 can not provide the skimming function, the P3 successive accumulation process is entered until the condition of entering the P4 is met. As known from the P2 point selection method, the method can always adapt to each sliding starting point value in the P3 process, and ensures the single binding quality.
The fourth stage is a slip stage (P4 control stage).
The stage control adopts a closed-loop control method, the target turbine rotating speed change rate is used as a control target, the torque increasing process of the hydraulic torque converter is considered, the torque required to be provided by the clutch is required to be increased along with the gradual combination process of the clutch, the feedforward control current is calculated according to the theoretical torque ratio of the hydraulic torque converter, the PID value is increased on the basis, and the time controllability of the slip process is ensured.
The fifth stage is a slow combination stage (P5 control stage).
The phase mainly considers the precision problem of the rotating speed sensor, cannot provide an accurate rotating speed value and is not suitable for continuously carrying out closed-loop control, the phase mainly provides a stable current for slowly combining the clutch, and the closed-loop terminal current is directly used as a basic value.
The sixth phase is an increase safety factor phase (P6 control phase).
The control stage provides safety factors for the clutch, and the situation that the clutch is disengaged when torque rises in the control stage and impact is caused when subsequent current rises rapidly to influence the gear shifting quality is avoided.
Has the advantages that: the gear-entering control method provides a self-adaptive solution for controlling the static gear-entering process of the automatic transmission, effectively avoids adverse effects caused by the problems of oil temperature, consistency and the like, ensures the single gear-entering process and improves the gear-shifting impact in the actual gear-entering process.
Drawings
FIG. 1 is a method flowchart of a static shift control method of the present invention.
FIG. 2 is a schematic diagram of clutch control and speed during a static shift of the present transmission;
where 1 is the engine speed, 2 is the clutch control amount, and 3 is the turbine speed.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
Referring to FIG. 1, a method flowchart of the static shift control method of the present invention divides the static on-coming clutch control into six phases.
The first stage is a fast oil filling stage (P1 control stage).
In order to avoid the influence caused by factors such as the rigidity of an electromagnetic valve and a hydraulic slide valve spring, full-opening oil filling is adopted in the oil filling stage, and the hydraulic slide valve is in the maximum oil feeding state, and 1000mA is adopted for quick oil filling; the purpose of this stage is to make the oil pocket fill with the lubricating oil fast, the oil charge time at this moment must be suitable, the oil charge time will be very long for too small oil charge time, will result in the impact for too large oil charge time; in order to ensure proper oil filling, the data of the valve plate test bench and the high-low temperature test bench are required to be correspondingly adjusted.
The second stage is the slip start point control (P2 control stage).
The starting point of the sliding grinding is mainly based on the point which is smaller in the rack data and is used as the initial value of the point, and the problem that the self-adaptive function cannot be provided when the starting point of the sliding grinding is smaller because the value is too large is mainly considered.
The third stage is an adaptation stage (P3 control stage).
The main purpose of the P3 stage is to make an approximation of the point of wear, which is not present if the entry into the P4 condition has been met in the P2 stage; the process is a main process for providing the self-adaptive skimming point, and if the skimming starting point value provided by the stage P2 can not provide the skimming function, the P3 successive accumulation process is entered until the condition of entering the P4 is met. As known from the P2 point selection method, the method can always adapt to each sliding starting point value in the P3 process, and ensures the single binding quality.
The fourth stage is a slip stage (P4 control stage).
The stage control adopts a closed-loop control method, the target turbine rotating speed change rate is used as a control target, the torque increasing process of the hydraulic torque converter is considered, the torque required to be provided by the clutch is required to be increased along with the gradual combination process of the clutch, the feedforward control current is calculated according to the theoretical torque ratio of the hydraulic torque converter, the PID value is increased on the basis, and the time controllability of the slip process is ensured.
The fifth stage is a slow combination stage (P5 control stage).
The phase mainly considers the precision problem of the rotating speed sensor, cannot provide an accurate rotating speed value and is not suitable for continuously carrying out closed-loop control, the phase mainly provides a stable current for slowly combining the clutch, and the closed-loop terminal current is directly used as a basic value.
The sixth phase is an increase safety factor phase (P6 control phase).
The control stage provides safety factors for the clutch, and the situation that the clutch is disengaged when torque rises in the control stage and impact is caused when subsequent current rises rapidly to influence the gear shifting quality is avoided.
As shown in FIG. 2, the clutch control amount and the rotating speed in the static shifting process of the transmission are shown schematically; 1 is the engine speed, 2 is the clutch control, and 3 is the turbine speed.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical scheme according to the technical idea proposed by the present invention falls within the protection scope of the present invention; the technology not related to the invention can be realized by the prior art.
Claims (4)
1. A static gear shift control method of an automatic transmission, characterized by: the method comprises the following steps:
the first stage is a quick oil filling stage, full-opening oil filling is adopted, and the hydraulic slide valve is in a maximum oil inlet state;
the second stage is a slip starting point control stage, the basic current value is reduced to a certain small value point after the oil filling control of the first stage is completed, and the point is used as the slip starting point of the clutch;
the third stage is an adaptive stage, the main purpose of which is to perform an approximation of the point of the sliding wear, if the conditions for entering the fourth stage have been met in the second stage, the control process is not available; if the sliding grinding initial point value provided by the second stage can not provide the sliding grinding function, the third stage successive accumulation process is carried out until the condition of entering the fourth stage is met;
the fourth stage is a sliding grinding stage;
the fifth stage is a slow combination stage, a stable current for slowly combining the clutch is provided, and a closed-loop tail end current is used as a basic value;
the sixth stage is a stage of increasing the safety factor, the control stage provides the safety factor for the clutch, and the situation that the clutch is disengaged when the torque rises in the sixth stage and the impact is caused when the subsequent current rises rapidly to influence the gear shifting quality is avoided.
2. The static shift control method of claim 1, wherein: the first stage was undertaken with a fast oil charge of 1000 mA.
3. The static shift control method of claim 1, wherein: the initial point of the second stage of the sliding grinding is mainly based on a smaller point in the bench data as an initial value of the point.
4. The static shift control method of claim 1, wherein: and in the fourth stage, a closed-loop control method is adopted, the target turbine rotating speed change rate is used as a control target, the torque increasing process of the hydraulic torque converter is considered, the torque required by the clutch needs to be increased along with the gradual combination process of the clutch, the feedforward control current is calculated according to the theoretical torque ratio of the hydraulic torque converter, the PID value is increased on the basis, and the time controllability of the slip process is ensured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010397771.4A CN111536230A (en) | 2020-05-12 | 2020-05-12 | Static gear shifting control method of automatic gearbox |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010397771.4A CN111536230A (en) | 2020-05-12 | 2020-05-12 | Static gear shifting control method of automatic gearbox |
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| CN111536230A true CN111536230A (en) | 2020-08-14 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112081912A (en) * | 2020-09-25 | 2020-12-15 | 一汽解放汽车有限公司 | Static gear shifting control method and static gear shifting control system |
| CN112628394A (en) * | 2021-02-18 | 2021-04-09 | 雷沃工程机械集团有限公司 | Control strategy for clutch of planetary gearbox of loader |
| CN112628395A (en) * | 2021-02-18 | 2021-04-09 | 雷沃工程机械集团有限公司 | Control strategy of proportional electromagnetic valve for loader planetary gearbox |
| CN112648367A (en) * | 2021-02-18 | 2021-04-13 | 雷沃工程机械集团有限公司 | Proportional electromagnetic valve current control method for planetary gearbox of loader |
| CN114776727A (en) * | 2022-04-15 | 2022-07-22 | 潍柴动力股份有限公司 | Control method and control device for oil filling of wet clutch and controller of vehicle |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112081912A (en) * | 2020-09-25 | 2020-12-15 | 一汽解放汽车有限公司 | Static gear shifting control method and static gear shifting control system |
| CN112081912B (en) * | 2020-09-25 | 2021-09-28 | 一汽解放汽车有限公司 | Static gear shifting control method and static gear shifting control system |
| CN112628394A (en) * | 2021-02-18 | 2021-04-09 | 雷沃工程机械集团有限公司 | Control strategy for clutch of planetary gearbox of loader |
| CN112628395A (en) * | 2021-02-18 | 2021-04-09 | 雷沃工程机械集团有限公司 | Control strategy of proportional electromagnetic valve for loader planetary gearbox |
| CN112648367A (en) * | 2021-02-18 | 2021-04-13 | 雷沃工程机械集团有限公司 | Proportional electromagnetic valve current control method for planetary gearbox of loader |
| CN114776727A (en) * | 2022-04-15 | 2022-07-22 | 潍柴动力股份有限公司 | Control method and control device for oil filling of wet clutch and controller of vehicle |
| CN114776727B (en) * | 2022-04-15 | 2024-03-19 | 潍柴动力股份有限公司 | Control method and control device for filling oil into wet clutch and controller of vehicle |
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Application publication date: 20200814 |
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