CN115234646B - Control method for relieving gear shifting jamming phenomenon of automatic gearbox driving - Google Patents
Control method for relieving gear shifting jamming phenomenon of automatic gearbox driving Download PDFInfo
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- CN115234646B CN115234646B CN202210849556.2A CN202210849556A CN115234646B CN 115234646 B CN115234646 B CN 115234646B CN 202210849556 A CN202210849556 A CN 202210849556A CN 115234646 B CN115234646 B CN 115234646B
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000007935 neutral effect Effects 0.000 claims abstract description 29
- 230000001360 synchronised effect Effects 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims 7
- 230000010485 coping Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- 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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses a control method for relieving the phenomenon of gear shifting jamming of an automatic gearbox driving vehicle. The method comprises the following steps of: when the synchronizer gear sleeve is in the first stage, if clamping stagnation occurs, the synchronizer gear sleeve is controlled to retract to a neutral gear position, and gear shifting is re-executed; when the synchronizer gear sleeve is in the second stage, if clamping stagnation occurs, the synchronizer gear sleeve is controlled to retract to a neutral gear position, meanwhile, the pressure of a clutch driving disc is controlled, and the gear shifting action is executed again; when the synchronizer gear sleeve is in the third stage, if clamping stagnation occurs, the synchronizer gear sleeve is controlled to retract to the neutral position, meanwhile, the pressure of the clutch driving disc is controlled, and the gear shifting action is executed again. According to the method, the positions of the synchronizer gear sleeve, which are blocked, are distinguished by identifying different stages of the synchronizer gear sleeve in the gear shifting process, so that a coping strategy is formulated, gear shifting impact and noise can be greatly reduced, and the fatigue endurance life of a synchronizer system and a gear shifting system is prolonged.
Description
Technical Field
The invention belongs to the technical field of automobile control, and particularly relates to a control method for relieving a gear shifting jamming phenomenon of an automatic gearbox driving.
Background
The arrangement of shaft teeth, which are largely employed in double clutch automatic gearboxes, is in the form of parallel shafts, in which the structure of the coupling gear corresponding gears commonly employs synchronizers. The synchronizer inevitably generates a gear shifting clamping problem in the gear shifting process, for example, tooth top teeth are generated on the combining teeth and the tooth sleeve, locking (the shifting ring cannot be realized) is generated on the synchronizing ring, and the like. According to the currently mastered experience data, the probability of gear shifting jamming of the synchronizer is about 1%. In manual gearboxes, synchronizer shift stuck may be recognized by the driver and a re-shift attempt performed. In an automatic gearbox, the existing method for solving the problem of gear shifting jamming mostly increases gear shifting force, and the method can cause great damage to hardware, generate great gear shifting noise and gear shifting impact and seriously influence driving feeling of a driver.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a control method for relieving the gear shifting jamming phenomenon of an automatic gearbox driving.
The technical scheme adopted by the invention is as follows: a control method for relieving the gear shifting jamming phenomenon of an automatic gearbox traveling crane comprises the following steps of: setting the position of the synchronizer gear sleeve in the shifting process to comprise 3 stages, namely a first stage, a second stage and a third stage; the first stage is a region between a neutral gear position and a synchronous point position, the second stage is a region between the synchronous point position and a combined tooth top position, and the third stage is a region between the combined tooth top position and a back taper angle starting position;
When the synchronizer gear sleeve is in the first stage, if clamping stagnation occurs, the synchronizer gear sleeve is controlled to retract to a neutral gear position, and gear shifting is re-executed;
when the synchronizer gear sleeve is in the second stage, if clamping stagnation occurs, the synchronizer gear sleeve is controlled to retract to a neutral gear position, meanwhile, the pressure of a clutch driving disc is controlled, and the gear shifting action is executed again;
when the synchronizer gear sleeve is in the third stage, if clamping stagnation occurs, the synchronizer gear sleeve is controlled to retract to the neutral position, meanwhile, the pressure of the clutch driving disc is controlled, and the gear shifting action is executed again.
Further, when the synchronizer gear sleeve is in the first stage or the third stage, the moving speed of the synchronizer gear sleeve is judged, and if the moving speed is smaller than a first threshold value, the occurrence of clamping stagnation is judged.
Further, when the synchronizer gear sleeve is in the second stage, judging the absolute value of the difference value between the rotation speed of the output shaft corresponding to the target gear and the rotation speed of the driven gear and the maintaining time, and judging that clamping stagnation occurs if the absolute value of the difference value is larger than or equal to a second threshold value or the maintaining time is larger than or equal to the set time.
Further, the control of the pressure of the clutch driving disc comprises the steps of firstly controlling the clutch driving disc to establish a set pressure value, maintaining the set time, and then controlling the clutch driving disc pressure value to return to a corresponding value of a disengagement state.
Further, the method also comprises a gear-reversing control process: after receiving the target neutral position signal, outputting a PWM value to the motor; judging whether clamping stagnation occurs according to the moving speed of the synchronizer gear sleeve, and if the clamping stagnation occurs, controlling and adjusting the clutch pressure value or increasing the PWM value and then re-outputting the PWM value to the motor.
Further, when the moving speed of the synchronizer gear sleeve is smaller than a third threshold value, the occurrence of clamping stagnation is judged.
Further, a hysteresis occurs, whether the difference value between the output rotation speed of the engine and the rotation speed of the input shaft corresponding to the gear of the gearbox is larger than or equal to a fourth threshold value is judged, and if not, the clutch pressure value is controlled and adjusted; if so, control increases the PWM value.
Further, the clutch pressure value is adjusted to be the clutch pressure value corresponding to the disengagement gear to the disengagement threshold value.
Further, the increased PWM value is to increase the set value based on the current output PWM value, and the increased PWM value is not more than 100%.
Still further, the set value is 10% -15%.
According to the method, the positions of the synchronizer gear sleeve, which are blocked, are distinguished by identifying different stages of the synchronizer gear sleeve in the gear shifting process, so that a coping strategy is formulated, the method can solve various gear shifting blocking problems, greatly reduce gear shifting impact and noise, improve the fatigue endurance life of a synchronizer system and a gear shifting system, avoid the advanced damage of the synchronizer system and the gear shifting system, and improve the driving comfort of the whole vehicle.
Drawings
FIG. 1 is a flow chart of the upshift control process of the present invention.
FIG. 2 is a flowchart of a reverse gear control process according to the present invention.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present invention, but is not intended to limit the present invention. In addition, technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The invention provides a control method for relieving the phenomenon of gear shifting jamming of an automatic gearbox driving, which comprises a gear entering control process, wherein the positions of a synchronizer gear sleeve, which are jammed, are distinguished mainly by identifying different stages of the synchronizer in the gear shifting process, so that a coping strategy is formulated. Setting the position of the synchronizer gear sleeve in the shifting process to comprise 3 stages, namely a first stage, a second stage and a third stage; the first stage is a region between a neutral position and a synchronization point position, the second stage is a region between the synchronization point position and a combined tooth top position, and the third stage is a region between the combined tooth top position and a back taper angle starting position.
When the synchronizer gear sleeve is in the first stage, if the moving speed of the synchronizer gear sleeve is smaller than a first threshold value, the condition that the clamping stagnation exists is indicated, at the moment, the synchronizer gear sleeve is returned to the neutral position by executing operation, and the gear shifting action is executed again. If the moving speed of the synchronizer gear sleeve is larger than or equal to a first threshold value, judging whether the synchronizer gear sleeve reaches a synchronous point target position, if so, entering the next stage, and if not, continuing to output the PWM target value and the synchronous point target position.
When the synchronizer gear sleeve is in the second stage, if the absolute value of the difference between the rotation speed of the output shaft corresponding to the target gear and the rotation speed of the driven gear in the first set time is smaller than a second threshold value, a PWM target value is output at the moment, and whether the synchronizer reaches the combined tooth top position is judged again. If accumulation is overtime, or the absolute value of the difference between the rotation speed of the output shaft corresponding to the target gear and the rotation speed of the driven gear is larger than or equal to a second threshold value, the synchronizer gear sleeve is executed to retract to the neutral position, the set pressure value is established for the clutch driving disc corresponding to the target gear, the second set time is maintained, then the pressure is returned to the clutch disengagement corresponding value, and the gear shifting action is executed again.
When the synchronizer gear sleeve is in the third stage, if the moving speed of the synchronizer gear sleeve in the gear-entering direction is smaller than a first threshold value, the condition that the clamping stagnation exists is indicated, at the moment, the synchronizer gear sleeve is returned to a neutral gear position by executing operation, a set pressure value is established for a target gear corresponding to a clutch driving disc, a second set time is maintained, the pressure is returned to a clutch disengagement corresponding value, and gear shifting action is executed again. If the moving speed of the synchronizer gear sleeve is greater than or equal to the threshold value, judging whether the synchronizer reaches the back taper angle starting position. If the PWM value reaches the preset PWM value, the next stage is started, and if the PWM value does not reach the preset PWM value, the PWM value of the shifting motor and the reverse taper angle starting position are continuously output.
The control method for relieving the gear shifting jamming phenomenon of the automatic gearbox driving further comprises the neutral gear removing process: when the synchronizer gear sleeve is positioned between the gear position and the neutral gear position, if the moving speed of the synchronizer gear sleeve to the neutral gear position is smaller than a third threshold value, the fact that clamping stagnation possibly exists is indicated, and whether the difference value between the output rotating speed of the engine and the rotating speed of the input shaft corresponding to the gear position of the gearbox is larger than or equal to a fourth threshold value is further judged. If not, the clutch pressure value corresponding to the out-of-gear position is adjusted to the out-of-gear threshold value, and then the PWM value is output again. And if the difference value between the output rotation speed of the engine and the rotation speed of the input shaft corresponding to the gear-out gear of the gearbox is larger than or equal to a fourth threshold value, increasing the PWM value.
Examples
The logic for the shift jamming response in the gear entering process is shown in fig. 1:
Step1, firstly, a TCU receives a target gear signal, and then outputs a PWM target value and a synchronous point target position to a gear shifting motor;
And 2, driving a gear shifting system by a gear shifting motor so as to push the synchronizer gear sleeve to move from the neutral position to the target position of the synchronization point. And judging whether the moving speed of the synchronizer gear sleeve is smaller than a first threshold value. If so, the synchronizer gear sleeve rapidly retreats to the neutral gear position, then a PWM target value is output, the gear shifting motor is started, and the gear shifting action of the synchronizer gear sleeve is performed again. If not, judging whether the synchronizer gear sleeve reaches the target position of the synchronization point, and entering step 3 or step 4.
Step 3, if the synchronizer gear sleeve does not reach the synchronous point target position, re-outputting the PWM target value and the synchronous point target position, and returning to the step 2
And 4, if the synchronizer gear sleeve reaches the target position of the synchronization point, the TCU can output the PWM target value and the combined tooth top position, and the step 5 is performed.
And 5, judging whether the synchronizer reaches the tooth top position of the combination tooth, and entering step 6 or step 7.
And 6, if the synchronizer does not reach the tooth top position of the combination tooth, judging whether the absolute value of the difference between the rotation speed of the output shaft corresponding to the target gear and the rotation speed of the driven gear in the set time is smaller than a second threshold value. If yes, maintaining the PWM of the gear shifting motor, and continuously judging whether the synchronizer reaches the combined tooth top position. If not, the synchronizer gear sleeve rapidly retreats to the neutral gear position, a set pressure value is established for the clutch driving disc corresponding to the target gear, and the set time is maintained. And then returning the clutch driving disc pressure value to a corresponding value of the disengagement state. And finally, outputting the PWM target value and the synchronous point target position again, and returning to the step 2.
Step 7, if the synchronizer reaches the tooth top position of the combination tooth, outputting a PWM target value and a back taper angle starting position of the gear shifting motor, and entering step 8
And 8, judging whether the moving speed of the synchronizer gear sleeve is smaller than a first threshold value, and entering step 9 or step 10.
And 9, if so, quickly returning the synchronizer gear sleeve to the neutral gear position, establishing a set pressure value for the clutch driving disc corresponding to the target gear, and maintaining the set time. And then returning the clutch driving disc pressure value to a corresponding value of the disengagement state. And finally, outputting the PWM target value and the synchronous point target position of the gear shifting motor again, and returning to the step 2.
And 10, if not, judging whether the synchronizer gear sleeve reaches the back taper angle starting position. If yes, the shift motor PWM target value and the gear position target value are output, and the step 11 is entered.
Step 11, judging whether the synchronizer gear sleeve reaches the gear position, and entering step 12 or step 13.
Step 12, if not, the shift motor PWM target value and the gear position target value are output again.
And step 13, if so, stopping the gear shifting motor to finish the gear shifting process.
The shift stuck handling logic during the neutral shift is shown in fig. 2:
step 1, receiving a target neutral position signal, and entering step 2.
And step 2, outputting a PWM value of the gear shifting motor, and entering step 3.
And 3, judging whether the moving speed of the synchronizer gear sleeve to the neutral gear position is lower than a third threshold value, and entering step 4 or step 5.
And 4, if not, judging whether the synchronizer reaches the target neutral position. If yes, the gear shifting motor PWM is set to zero. If not, returning to the step 2.
And 5, if the moving speed of the synchronizer gear sleeve to the neutral gear position is judged to be lower than a third threshold value, judging whether the difference value between the engine output rotating speed and the rotating speed of the input shaft corresponding to the gear position of the gearbox is larger than or equal to the threshold value. If yes, the PWM value is increased, the set value is increased on the basis of the current output PWM value, the increased PWM value does not exceed 100%, and the step 2 is returned. If not, the clutch pressure value corresponding to the gear which is out of gear is adjusted to the disengagement threshold value, and then the step 2 is returned.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. What is not described in detail in this specification is prior art known to those skilled in the art.
Claims (8)
1. A control method for relieving the phenomenon of gear shifting jamming of an automatic gearbox driving is characterized by comprising the following steps: the method comprises the following steps of: setting the position of the synchronizer gear sleeve in the shifting process to comprise 3 stages, namely a first stage, a second stage and a third stage; the first stage is a region between a neutral gear position and a synchronous point position, the second stage is a region between the synchronous point position and a combined tooth top position, and the third stage is a region between the combined tooth top position and a back taper angle starting position;
When the synchronizer gear sleeve is in the first stage, if clamping stagnation occurs, the synchronizer gear sleeve is controlled to retract to a neutral gear position, and gear shifting is re-executed;
when the synchronizer gear sleeve is in the second stage, if clamping stagnation occurs, the synchronizer gear sleeve is controlled to retract to a neutral gear position, meanwhile, the pressure of a clutch driving disc is controlled, and the gear shifting action is executed again;
When the synchronizer gear sleeve is in the third stage, if clamping stagnation occurs, the synchronizer gear sleeve is controlled to retract to a neutral gear position, meanwhile, the pressure of a clutch driving disc is controlled, and the gear shifting action is executed again;
Judging the moving speed of the synchronizer gear sleeve when the synchronizer gear sleeve is in the first stage or the third stage, and judging that clamping stagnation occurs if the moving speed is smaller than a first threshold value;
When the synchronizer gear sleeve is in the second stage, judging the absolute value of the difference value between the output shaft rotating speed corresponding to the target gear and the driven gear rotating speed and the maintaining time, and judging that clamping stagnation occurs if the absolute value of the difference value is larger than or equal to a second threshold value or the maintaining time is larger than or equal to the set time.
2. The control method for releasing the shift jamming phenomenon of the automatic transmission according to claim 1, characterized by comprising the steps of: the control of the pressure of the clutch driving disc comprises the steps of firstly controlling the clutch driving disc corresponding to the target gear to establish a set pressure value, maintaining the set time, and then controlling the pressure value of the clutch driving disc to return to a value corresponding to the disengagement state.
3. The control method for releasing a shift jamming phenomenon of an automatic transmission according to claim 1, further comprising a reverse gear control process of: after receiving the target neutral position signal, outputting a PWM value to the motor; judging whether clamping stagnation occurs according to the moving speed of the synchronizer gear sleeve, and if the clamping stagnation occurs, controlling and adjusting the clutch pressure value or increasing the PWM value and then re-outputting the PWM value to the motor.
4. The control method for releasing the shift jamming phenomenon of the automatic transmission according to claim 3, characterized by: and when the moving speed of the synchronizer gear sleeve is smaller than a third threshold value, judging that clamping stagnation occurs.
5. The control method for releasing the shift jamming phenomenon of the automatic transmission according to claim 3, characterized by: judging whether the difference value between the output rotating speed of the engine and the rotating speed of the input shaft corresponding to the gear of the gearbox is larger than or equal to a fourth threshold value or not when the hysteresis occurs, and if not, controlling and adjusting the clutch pressure value; if so, control increases the PWM value.
6. The control method for releasing the shift jamming phenomenon of the automatic transmission according to claim 3, characterized by: and the clutch pressure value is adjusted to be the clutch pressure value corresponding to the release gear to the release threshold value.
7. The control method for releasing the shift jamming phenomenon of the automatic transmission according to claim 3, characterized by: and the PWM value is increased by a set value on the basis of the current output PWM value, and the increased PWM value is not more than 100%.
8. The control method for releasing the shift jamming phenomenon of the automatic transmission according to claim 7, characterized by: the set value is 10% -15%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210849556.2A CN115234646B (en) | 2022-07-19 | 2022-07-19 | Control method for relieving gear shifting jamming phenomenon of automatic gearbox driving |
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| CN202210849556.2A CN115234646B (en) | 2022-07-19 | 2022-07-19 | Control method for relieving gear shifting jamming phenomenon of automatic gearbox driving |
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| CN115234646B true CN115234646B (en) | 2024-05-28 |
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| CN116066556B (en) * | 2023-01-02 | 2024-07-19 | 重庆长安汽车股份有限公司 | Control method and system for preventing shift fork of dual clutch transmission from being in gear failure and vehicle |
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| KR20160065617A (en) * | 2014-12-01 | 2016-06-09 | 현대자동차주식회사 | The shift control method for preventing a failed start-stage implementation of the hybrid vehicle |
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| CN106286813A (en) * | 2016-08-18 | 2017-01-04 | 安徽江淮汽车股份有限公司 | Double-clutch automatic gearbox shift fork is put into gear force control method |
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