CN116221388B - Control method, equipment, medium, speed changer and vehicle for preventing pawl from being jammed - Google Patents
Control method, equipment, medium, speed changer and vehicle for preventing pawl from being jammed Download PDFInfo
- Publication number
- CN116221388B CN116221388B CN202310491107.XA CN202310491107A CN116221388B CN 116221388 B CN116221388 B CN 116221388B CN 202310491107 A CN202310491107 A CN 202310491107A CN 116221388 B CN116221388 B CN 116221388B
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- Prior art keywords
- transmission
- gear
- input shaft
- control method
- pawl
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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
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- 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
- F16H63/34—Locking or disabling mechanisms
- F16H63/3416—Parking lock mechanisms or brakes in the transmission
- F16H63/3425—Parking lock mechanisms or brakes in the transmission characterised by pawls or wheels
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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
- F16H63/40—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 comprising signals other than signals for actuating the final output mechanisms
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The invention relates to the technical field of speed changers, in particular to a control method, equipment, a medium, a speed changer and a vehicle for preventing pawl clamping stagnation; when the transmission is controlled in P, the rotation speed of an input shaft of the transmission is obtained, and if the rotation speed of the input shaft meets the parking condition, the parking mechanism is controlled to clamp the pawl into the gear, so that the P-gear parking operation is completed. When the transmission enters P, judging the oil pressure of the clutch through the rotating speed value of the input shaft of the transmission, and when the rotating speed of the input shaft of the transmission is higher, considering that the clutch does not transmit torque at the moment; the clutch oil pressure can be accurately reflected, the control accuracy is improved, and the probability of pawl clamping stagnation after the transmission is hung into the P gear is reduced.
Description
Technical Field
The invention relates to the technical field of speed changers, in particular to a control method, equipment, medium, speed changer and vehicle for preventing pawl clamping stagnation.
Background
Automatic transmissions typically have four gears P, R, N, D, with the P gear referred to as park. The vehicle is typically put into P when the driver needs to park for a long period of time or to leave the cab. The P gear has the function that after a driver releases the foot brake, the transmission can provide certain parking capacity when the driver does not pull the brake, so that the vehicle is stopped stably and does not slip. The working principle of the parking of the P gear is as follows: when the D gear or the R gear is hung into the P gear, the TCU can control the clutch of the D gear or the R gear to release pressure, and simultaneously, immediately control the parking mechanism to clamp the pawl into the gear at the output end of the speed changer, so that the pawl is fixed and not rotated, and the effect of parking is achieved after the output shaft of the speed changer is locked.
When the vehicle is in D/R gear, the power of the engine is output from the transmission to the wheel end. When the gear P is engaged, the driver steps on the brake, the vehicle speed is zero, and the parking mechanism clamps the pawl into the gear at the output end of the transmission. In the initial stage of the pressure release of the D-gear or R-gear clutch, the oil pressure is higher, and the clutch can still transmit a certain torque which can force the frame, the chassis and the like to deform to a certain extent. As the clutch oil pressure continues to decrease, the clutch transfer torque also decreases until no torque is output at the transmission output. At this moment, the automobile body easily appears shrugging, and the automobile body shrugs and can lead to derailleur output gear to rotate to make the pawl of card income wherein receive great power card on the gear, go out P next time and will appear the pawl and be difficult to pull out, pull out the obvious problem of shaking of instantaneous vehicle.
In order to prevent this, it is currently mainly required for the driver to perform the hanging P operation in the correct way; specifically, after the vehicle brakes are stopped, the hand brake is pulled up, then the P gear is hung in, and finally the foot brake is loosened. Because the actual operations of drivers are different, the accuracy of the hanging P operation is not well controlled, the transmission is easy to damage, and the driving comfort is also affected.
Disclosure of Invention
The invention aims to solve the technical problem of providing a control method, equipment, medium, a transmission and a vehicle for preventing pawl jamming, which comprehensively judge the clutch oil pressure condition of torque transmission when the transmission enters P, and carry out P hanging operation after the deformation of a vehicle body is reset and is in a stable state, so that the pawl jamming probability is reduced.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a control method for preventing pawl jamming comprises
When the transmission is controlled in P, the rotation speed of an input shaft of the transmission is obtained, and if the rotation speed of the input shaft meets the parking condition, the parking mechanism is controlled to clamp the pawl into the gear, so that the P-gear parking operation is completed.
In a preferred embodiment of the present invention, the parking condition is that the input shaft rotational speed is higher than the rotational speed set point.
As a preferable mode of the invention, when the transmission meets the P-entering triggering condition, the transmission is controlled to enter P; the P-entry trigger condition is that the following three conditions are satisfied simultaneously,
a) The TCU receives the P-in signal;
b) The vehicle speed is zero;
c) The brake pedal brakes.
As a preferred mode of the present invention, it comprises the steps of,
judging whether the following three conditions are simultaneously met:
a) The TCU receives the P-in signal;
b) The vehicle speed is zero;
c) Braking a brake pedal;
if yes, controlling the clutch to carry out N return control;
and then, acquiring the rotating speed of the input shaft of the transmission, and if the rotating speed of the input shaft meets the parking condition, controlling the parking mechanism to clamp the pawl into the gear, so as to finish the P-gear parking operation.
As a preferred mode of the present invention, it comprises the steps of,
judging whether the following three conditions are simultaneously met:
a) The TCU receives the P-in signal;
b) The vehicle speed is zero;
c) Braking a brake pedal;
if yes, the timer starts to count, and the TCU controls the clutch to carry out N return control;
and then, acquiring the rotating speed of the input shaft of the transmission, and controlling the parking mechanism to clamp the pawl into the gear to finish the P-gear parking operation if the rotating speed of the input shaft meets the parking condition or the timer is equal to the limiting time.
As a preferable mode of the present invention, the rotation speed set value is obtained according to the current gear and the oil temperature of the clutch corresponding to the current gear.
A transmission applying the control method for preventing the pawl from being blocked.
An electronic device comprising a controller, a memory, the memory storing a computer program; when the controller executes the computer program, the control method is realized.
A vehicle comprises the electronic equipment.
A computer readable storage medium having stored therein program source code or instructions which, when executed, perform the control method described above.
Due to the adoption of the technical scheme, the invention has the following advantages:
1) When the transmission is fed with P, the clutch oil pressure is judged according to the rotation speed value of the transmission input shaft, and when the rotation speed of the transmission input shaft is high, the clutch is considered to not transmit torque at the moment; the clutch oil pressure can be accurately reflected, and the control accuracy is improved.
2) In the P-entering process, when the deformation of the vehicle body, the chassis and the like is in a stable state after reset, the TCU controls the pawl to be clamped into the gear content of the output shaft for parking, and the probability of pawl clamping stagnation after the transmission is hung into the P gear can be effectively reduced.
3) The P-in control is limited by the maximum time, and the pawl is forced to carry out parking operation after the P-in time reaches the maximum time, so that the occurrence of failure of the rotating speed signal of the input shaft can be avoided.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a control graph of the present invention.
Detailed Description
A control method for preventing pawl jamming comprises
When the transmission is controlled in P, the rotation speed of an input shaft of the transmission is obtained, and if the rotation speed of the input shaft meets the parking condition, the parking mechanism is controlled to clamp the pawl into the gear, so that the P-gear parking operation is completed.
In the control method, the parking condition is that the rotating speed of the input shaft is higher than a rotating speed set value, and the rotating speed set value is obtained by inquiring a rotating speed setting table.
Because the gears D1, D2, D3 and R have the possibility of P, and the actual oil drainage condition of the clutch corresponding to the current gear is influenced by the oil temperature; after a large number of tests and tests, the rotation speed set value, the current gear and the oil temperature are stored to form a rotation speed setting table, and the rotation speed setting table is shown in the following table:
in the control process, the rotation speed set value is obtained through inquiring the current gear and the oil temperature of the clutch corresponding to the current gear. For example, when the current gear is D1, i.e., P is shifted from D1, and the oil temperature is detected to be 60 ℃, the rotational speed set value is V17. For the rotation speed set value which cannot be directly inquired from the table, the two adjacent oil temperature values and the rotation speed set value under the same gear are utilized to obtain the rotation speed set value through a linear interpolation method; for example, the oil temperature is 50 ℃ when the clutch corresponding to the D2 gear is actually drained from the P, D2 gear, and the rotation speed set value corresponding to 50 ℃ is obtained by a linear interpolation method by utilizing 40 ℃, V26 and 60 ℃ and V27; if V26 is 600 and V27 is 500, the rotation speed set value is 550.
When the transmission meets the P-entering triggering condition, P control is carried out on the transmission; the P-entry trigger condition is that the following three conditions are satisfied simultaneously,
a) The TCU receives the P-in signal;
b) The vehicle speed is zero;
c) The brake pedal brakes.
The control method for preventing the pawl from being blocked specifically comprises the following steps:
it is determined whether the following three conditions are simultaneously satisfied,
a) The TCU receives the P-in signal;
b) The vehicle speed is zero;
c) Braking a brake pedal;
if yes, controlling the clutch to carry out N return control; and then, acquiring the rotating speed of the input shaft of the transmission, and if the rotating speed of the input shaft is higher than a rotating speed set value, controlling the parking mechanism to clamp the pawl into the gear to finish the P-gear parking operation.
If not, the subsequent control is not performed, and the detection is continued, and whether the P-entering triggering condition is met is judged.
When P is fed into the clutch, a command oil pressure is given to the clutch for controlling the D gear or the R gear, namely the clutch is controlled to drain, and the command oil pressure cannot represent the actual oil pressure of the clutch because a certain process is needed for the clutch to drain; if the parking mechanism is immediately controlled to clamp the pawl into the gear at the output end of the transmission during P control, the pawl is fixed and not rotated, and the problem of pawl clamping stagnation can be generated. In the control method, the inventor creatively proposes and verifies that the input shaft rotating speed of the transmission is taken as a monitoring object, the actual oil pressure of the clutch is reflected through the input shaft rotating speed value, and the lower the oil pressure is, the higher the input shaft rotating speed is; the pawl jamming can be effectively avoided through the method.
When the P-entering triggering condition is met, the TCU controls the clutch to carry out N-returning control, as shown in time a in fig. 1, the clutch corresponding to the current gear starts to drain oil, and the rotating speed of the input shaft at the initial moment of the transmission is zero; as clutch oil pressure decreases, transmission input shaft speed may gradually increase from zero. If the rotational speed of the transmission input shaft is higher than the rotational speed set point, as shown in time b in fig. 1, it is indicated that the actual clutch oil pressure is low to the design requirement, i.e. no torque is transmitted, and the parking mechanism can be controlled to clamp the pawl into the gear, so that the problem of pawl clamping is avoided.
Because the input shaft rotating speed of the speed changer is acquired and calculated through a sensor, if the sensor fails, the accuracy of the input shaft rotating speed can be influenced, the risk that the input shaft rotating speed can not reach a set value forever exists, and the problem that the speed changer cannot be controlled to enter P is caused. Therefore, the control method introduces limiting time under the limit condition, namely when the three conditions are met, the timer starts to count; if the timer counts the time equal to the limit time, the parking mechanism is controlled to clamp the pawl into the gear even if the input shaft rotating speed condition is not met, so that the input shaft rotating speed signal failure condition is prevented.
Specifically, the control method for preventing the pawl from being blocked comprises the following steps:
it is determined whether the following three conditions are simultaneously satisfied,
a) The TCU receives the P-in signal;
b) The vehicle speed is zero;
c) Braking a brake pedal;
if yes, the timer starts to count, and the TCU controls the clutch to carry out N return control;
and then, acquiring the rotating speed of the input shaft of the transmission, and if the rotating speed of the input shaft is higher than a rotating speed set value or the timer is equal to the limiting time, controlling the parking mechanism to clamp the pawl into the gear by the TCU, so as to finish the P-gear parking operation.
The invention also protects an electronic device comprising a controller, a memory, the memory storing a computer program; when the controller executes the computer program, the control method for preventing the pawl from being blocked is realized.
A vehicle comprises the electronic equipment. In particular, the electronic apparatus mounted on the vehicle can perform the related operations of the control method of preventing the detent jamming.
A computer readable storage medium having stored therein program source code or instructions that when executed perform the control method for preventing detent jamming described above. Computer readable storage media capable of storing program source code or instructions in the prior art, including hard disk, USB flash disk, optical disk or electronic device, etc., when storing programs or instructions for executing the steps of the above method are within the scope of the present invention.
The invention also protects the speed changer applying the control method for preventing the pawl from clamping.
The foregoing has shown and described the basic principles, main features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The control method for preventing the pawl from being blocked is characterized by comprising the following steps: comprising
Judging whether the transmission meets the P-entering triggering condition, wherein the P-entering triggering condition meets the following three conditions simultaneously,
a) The TCU receives the P-in signal;
b) The vehicle speed is zero;
c) Braking a brake pedal;
if yes, performing traveling P control on the transmission; when the transmission is controlled to be in P-mode,
controlling the clutch to carry out N return control; then, acquiring the rotating speed of an input shaft of the transmission, and if the rotating speed of the input shaft meets the parking condition, controlling a parking mechanism to clamp a pawl into a gear to finish the P-gear parking operation; the parking condition is that the input shaft rotational speed is higher than the rotational speed set point.
2. The control method for preventing detent jamming according to claim 1, wherein: comprises the steps of,
judging whether the following three conditions are simultaneously met:
a) The TCU receives the P-in signal;
b) The vehicle speed is zero;
c) Braking a brake pedal;
if yes, the timer starts to count, and the TCU controls the clutch to carry out N return control;
and then, acquiring the rotating speed of the input shaft of the transmission, and controlling the parking mechanism to clamp the pawl into the gear to finish the P-gear parking operation if the rotating speed of the input shaft meets the parking condition or the timer is equal to the limiting time.
3. The control method for preventing detent jamming according to claim 1, wherein: the rotation speed set value is checked according to the oil temperature of the clutch corresponding to the current gear.
4. A transmission employing the control method for preventing detent jamming as claimed in any one of claims 1 to 3.
5. An electronic device, characterized in that: the system comprises a controller and a memory, wherein the memory stores a computer program; the controller, when executing the computer program, implements the control method according to any one of claims 1-3.
6. A vehicle, characterized in that: an electronic device comprising the device of claim 5.
7. A computer-readable storage medium, characterized by: the computer readable storage medium having stored therein program source code or instructions which, when executed, perform the control method of any of claims 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310491107.XA CN116221388B (en) | 2023-05-05 | 2023-05-05 | Control method, equipment, medium, speed changer and vehicle for preventing pawl from being jammed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310491107.XA CN116221388B (en) | 2023-05-05 | 2023-05-05 | Control method, equipment, medium, speed changer and vehicle for preventing pawl from being jammed |
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| Publication Number | Publication Date |
|---|---|
| CN116221388A CN116221388A (en) | 2023-06-06 |
| CN116221388B true CN116221388B (en) | 2023-08-08 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103946598A (en) * | 2011-11-17 | 2014-07-23 | 加特可株式会社 | Automatic transmission and method for determining selection operation of automatic transmission |
| CN106394522A (en) * | 2016-10-08 | 2017-02-15 | 浙江吉利控股集团有限公司 | Parking (P) automatic antilock system and control method |
| JP2017180725A (en) * | 2016-03-31 | 2017-10-05 | アイシン・エィ・ダブリュ株式会社 | Gear change device |
| JP2019147445A (en) * | 2018-02-26 | 2019-09-05 | ジヤトコ株式会社 | Control device of vehicle and control method of vehicle |
| CN115107774A (en) * | 2022-06-23 | 2022-09-27 | 江西五十铃汽车有限公司 | Ramp automatic parking method and system, readable storage medium and vehicle |
| JP2022147857A (en) * | 2021-03-23 | 2022-10-06 | 株式会社Subaru | shift control device |
-
2023
- 2023-05-05 CN CN202310491107.XA patent/CN116221388B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103946598A (en) * | 2011-11-17 | 2014-07-23 | 加特可株式会社 | Automatic transmission and method for determining selection operation of automatic transmission |
| JP2017180725A (en) * | 2016-03-31 | 2017-10-05 | アイシン・エィ・ダブリュ株式会社 | Gear change device |
| CN106394522A (en) * | 2016-10-08 | 2017-02-15 | 浙江吉利控股集团有限公司 | Parking (P) automatic antilock system and control method |
| JP2019147445A (en) * | 2018-02-26 | 2019-09-05 | ジヤトコ株式会社 | Control device of vehicle and control method of vehicle |
| JP2022147857A (en) * | 2021-03-23 | 2022-10-06 | 株式会社Subaru | shift control device |
| CN115107774A (en) * | 2022-06-23 | 2022-09-27 | 江西五十铃汽车有限公司 | Ramp automatic parking method and system, readable storage medium and vehicle |
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| CN116221388A (en) | 2023-06-06 |
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