CN111043300A - Gear shifting control method for AMT sliding sleeve of commercial vehicle - Google Patents
Gear shifting control method for AMT sliding sleeve of commercial vehicle Download PDFInfo
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- CN111043300A CN111043300A CN202010035970.0A CN202010035970A CN111043300A CN 111043300 A CN111043300 A CN 111043300A CN 202010035970 A CN202010035970 A CN 202010035970A CN 111043300 A CN111043300 A CN 111043300A
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- gear
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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
- F16H61/0403—Synchronisation before shifting
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Abstract
The invention discloses a gear shifting control method for an AMT sliding sleeve of a commercial vehicle, which comprises the steps of clutch semi-linkage point control, rotating speed difference control, gear engaging action and gear ejecting operation, and specifically comprises the following steps: performing theoretical calculation according to gear, sliding sleeve and gear engagement empirical data, and reasonably synchronizing window intervals; when a new gear shifting request is received, the TCU requests the engine to reduce torque, controls the clutch to separate, regulates the rotating speed, engages the clutch, finishes the gear entering action and requests the engine to return the torque; when the gear shifting phenomenon occurs, the position of the clutch is adjusted, the rotating speed difference is adjusted, and the gear shifting action is completed. The method utilizes the clutch position in the closed-loop control gear shifting process to remove the gear shifting stagnation phenomenon, obviously shortens the gear shifting time, reduces the power interruption, and improves the acceleration and the gear shifting quality of the vehicle.
Description
Technical Field
The invention relates to the field of ATM gear shifting control, in particular to a gear shifting control method for an AMT sliding sleeve of a commercial vehicle.
Background
The shifting of the commercial vehicle transmission comprises sliding sleeve shifting and synchronizer shifting, a sliding sleeve shifting structural diagram is shown in figure 1, the shifting needs to accurately control the rotating speed of a gear engaging gear 2 and the rotating speed of a sliding sleeve 1, a reasonable rotating speed difference is ensured, the gear engaging action is quicker, the comfort is good, otherwise, gear shifting and gear beating sound or gear shifting impact can occur, the gear shifting comfort is influenced, gear beating is frequent, and the service life of the transmission is seriously influenced; under some circumstances, the gear engagement failure can occur, the rotation speed is forced to be resynchronized to perform the gear engagement action, so that the power interruption time of the whole gear shifting is greatly prolonged, especially the gear shifting is performed on an upslope, the power loss is large, the circulating reverse gear occurs, namely, the condition of immediately reducing the gear after the gear is shifted up is realized, and the normal driving cannot be realized.
Disclosure of Invention
In order to solve the problems, the invention discloses a gear shifting control method for an AMT sliding sleeve of a commercial vehicle.
A gear shifting control method for an AMT sliding sleeve of a commercial vehicle comprises control of a clutch semi-linkage point, control of a rotating speed difference, gear engaging action and gear ejecting operation, and specifically comprises the following steps:
a gear shifting control method for an AMT sliding sleeve of a commercial vehicle is characterized by comprising control of a clutch semi-linkage point, control of a rotating speed difference, gear engaging action and gear ejecting operation, and specifically comprises the following steps:
1) performing theoretical calculation according to the sizes of the gear and the sliding sleeve and the gear engaging speed to obtain a synchronous window interval;
2) when a new gear shifting request is received, the TCU requests the engine to reduce torque, controls the clutch to separate, regulates the rotating speed, engages the clutch, finishes the gear entering action and requests the engine to return the torque;
3) when the gear-shifting phenomenon occurs, the TCU adjusts the position of the clutch, adjusts the rotating speed difference and completes the gear-shifting action.
Preferably, the clutch position is closed-loop controlled based on the engine speed regulation, the engine speed difference and the gear engaging action, and the method comprises the following specific steps:
1) after the gearbox returns to the neutral gear, the TCU activates a countershaft brake or a clutch to be engaged, and requests the rotating speed of the input shaft to reach a target rotating speed;
2) when the rotating speed difference meets the gear engagement requirement, the gear engagement action is completed, and the clutch completes further engagement action.
Preferably, the target rotational speed is calculated from the current rotational speed of the output shaft and the gear ratio of the pre-engaged gear.
The invention has the beneficial effects that:
compared with the traditional gear shifting control method, the gear shifting control method has the advantages that during gear shifting, the engagement of the clutch position is based on the rotating speed reduction slope and the gear engaging action of the transmission input shaft; when the gear is shifted down, the engagement of the clutch position is based on the speed difference and the gear engaging action, so that the gear shifting time is obviously shortened, the power interruption is reduced, and the acceleration and the gear shifting quality of the vehicle are improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a transmission shift gear and shift sleeve mechanism diagram;
FIG. 2 is an upshift control curve;
fig. 3 is a downshift control curve.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to ensure the success rate and comfort of gear shifting, the gear shifting control needs to reasonably control the rotation speed difference between a gear engaging gear and a sliding sleeve, firstly, the rotation speed difference of gear shifting is calculated theoretically, and the method comprises the following steps:
1. differential rotational speed calculation
1) Depth of gear engagement din=12mm；
2) The speed V of gear engagement is obtained through measuring datain=0.5m/s；
3) Required gear engaging time Tin=din/Vin=0.012/0.5=24ms;
4) The radius of the sliding sleeve is R =48 mm;
5) difference in rotational speed Ndiff=Vin*60s/2ΠR=100；
Namely, the rotating speed difference is controlled to be +/-100 rpm/min, and the gear is proper.
2. Upshift control process, as shown in FIG. 2
step 3, when the clutch is separated to the moment of unpowered transmission, the TCU controls the main box of the transmission to return to the neutral gear;
step 4, after the main box of the gearbox returns to the neutral gear, the TCU controls the insertion gear separation and the range gear of the gearbox to simultaneously perform gear shifting action, activates a countershaft brake to perform countershaft deceleration, calculates the speed reduction slope of the input shaft of the gearbox in real time, and is engaged to the position near a semi-linkage point through a closed-loop control clutch, and the method comprises the following specific steps: firstly, controlling the clutch to be engaged (a semi-linkage point-offset, a separation direction and an offset are set as calibration values), when the descending slope of the rotating speed of the input shaft is monitored to be close to 0, controlling the position of the clutch to be slowly engaged by the semi-linkage point-offset, wherein the engagement speed needs to be separately calibrated, and simultaneously monitoring the opening state of a main box gear shifting electromagnetic valve, and the position of the clutch is frozen when the electromagnetic valve is opened;
step 5, when the gear change speed difference is met, the main box finishes the gear engaging action, the clutch is controlled to be further engaged until the clutch is completely engaged, and meanwhile the engine is requested to improve the torque through the TSC 1.
If the gear-lifting phenomenon occurs, the clutch needs to be controlled to be separated (the separation position and the time are set as calibrated values), and the electromagnetic valve is required to be powered all the time in the whole process until the gear-shifting action is finished, so that the complete engagement of the clutch is further finished.
3. Downshift control procedure, as shown in FIG. 3
step 3, when the clutch is separated to the moment of unpowered transmission, the TCU controls the main box of the transmission to return to the neutral gear;
step 4, after the main box of the gearbox returns to the neutral gear, the TCU controls the insertion gear-splitting and the range gear of the gearbox to simultaneously perform gear shifting action, and meanwhile, the TCU is connected to the position near a semi-linkage point through a closed-loop control clutch, and the method comprises the following specific steps: firstly, controlling the clutch to start to be engaged to (semi-linkage point-offset), further controlling the clutch position to be slowly engaged from (semi-linkage point-offset), wherein the engagement speed needs to be separately calibrated, the rotation speed difference is changed from a negative value to a positive value at the moment, monitoring the opening state of a main box gear shifting electromagnetic valve, and the clutch position is frozen at the opening moment of the electromagnetic valve;
step 5, when the shift speed differential is met, the main box gear-in action is completed, the clutch is controlled to be further engaged until the clutch is completely engaged, and meanwhile, the engine is requested to improve the torque through the TSC 1.
If the gear-lifting phenomenon occurs in gear-shifting, the clutch needs to be controlled to be separated from a freezing position (the separation position and the time are set as calibration values), and the electromagnetic valve is required to be powered all the time in the whole process until the gear-shifting action is finished, so that the clutch is further engaged.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. A gear shifting control method for an AMT sliding sleeve of a commercial vehicle is characterized by comprising control of a clutch semi-linkage point, control of a rotating speed difference, gear engaging action and gear ejecting operation, and specifically comprises the following steps:
performing theoretical calculation according to the sizes of the gear and the sliding sleeve and the gear engaging speed to obtain a synchronous window interval;
when a new gear shifting request is received, the TCU requests the engine to reduce torque, controls the clutch to separate, regulates the rotating speed, engages the clutch, finishes the gear entering action and requests the engine to return the torque;
when the gear-shifting phenomenon occurs, the TCU adjusts the position of the clutch, adjusts the rotating speed difference and completes the gear-shifting action.
2. The AMT sliding sleeve gear shifting control method for the commercial vehicle according to claim 1, wherein the clutch position is controlled in a closed loop mode based on the engine speed regulation, the speed difference and the gear engaging action, and the method comprises the following specific steps:
after the gearbox returns to the neutral gear, the TCU activates a countershaft brake or a clutch to be engaged, and requests the rotating speed of the input shaft to reach a target rotating speed;
when the rotating speed difference meets the gear engagement requirement, the gear engagement action is completed, and the clutch completes further engagement action.
3. The AMT sliding sleeve gear-shifting control method for commercial vehicle as claimed in claim 2, wherein the target rotating speed is calculated by the current rotating speed of the output shaft and the transmission ratio of the pre-engaged gear.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010035970.0A CN111043300A (en) | 2020-01-14 | 2020-01-14 | Gear shifting control method for AMT sliding sleeve of commercial vehicle |
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| CN202010035970.0A CN111043300A (en) | 2020-01-14 | 2020-01-14 | Gear shifting control method for AMT sliding sleeve of commercial vehicle |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720535A (en) * | 2020-06-29 | 2020-09-29 | 安徽江淮汽车集团股份有限公司 | Synchronizer control method, synchronizer control device and storage medium |
| 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 |
| CN112360970A (en) * | 2020-11-24 | 2021-02-12 | 一汽解放汽车有限公司 | Static gear-engaging self-adaption method without synchronizer |
| CN112610687A (en) * | 2020-12-30 | 2021-04-06 | 潍柴动力股份有限公司 | Vehicle gear shifting method, device, equipment and storage medium |
| CN114251445A (en) * | 2021-12-21 | 2022-03-29 | 潍柴动力股份有限公司 | Vehicle gear shifting control method and device |
| CN114439926A (en) * | 2022-02-17 | 2022-05-06 | 一汽解放汽车有限公司 | Synchronizer-free AMT (automated mechanical transmission) downshift control method |
| CN114439925A (en) * | 2022-02-17 | 2022-05-06 | 一汽解放汽车有限公司 | Synchronizer-free AMT (automated mechanical transmission) upshift control method |
| CN114704638A (en) * | 2022-04-14 | 2022-07-05 | 一汽解放汽车有限公司 | Vehicle control method, device, equipment and medium |
| CN114754136A (en) * | 2022-04-28 | 2022-07-15 | 一汽解放汽车有限公司 | Sliding gear sleeve control method, automobile and computer readable storage medium |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720535A (en) * | 2020-06-29 | 2020-09-29 | 安徽江淮汽车集团股份有限公司 | Synchronizer control method, synchronizer control device and storage medium |
| 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 |
| CN112360970A (en) * | 2020-11-24 | 2021-02-12 | 一汽解放汽车有限公司 | Static gear-engaging self-adaption method without synchronizer |
| CN112610687B (en) * | 2020-12-30 | 2022-06-10 | 潍柴动力股份有限公司 | Vehicle gear shifting method, device, equipment and storage medium |
| CN112610687A (en) * | 2020-12-30 | 2021-04-06 | 潍柴动力股份有限公司 | Vehicle gear shifting method, device, equipment and storage medium |
| CN114251445A (en) * | 2021-12-21 | 2022-03-29 | 潍柴动力股份有限公司 | Vehicle gear shifting control method and device |
| CN114439926A (en) * | 2022-02-17 | 2022-05-06 | 一汽解放汽车有限公司 | Synchronizer-free AMT (automated mechanical transmission) downshift control method |
| CN114439925A (en) * | 2022-02-17 | 2022-05-06 | 一汽解放汽车有限公司 | Synchronizer-free AMT (automated mechanical transmission) upshift control method |
| CN114439926B (en) * | 2022-02-17 | 2023-10-03 | 一汽解放汽车有限公司 | Synchronizer-free AMT downshift control method |
| CN114704638A (en) * | 2022-04-14 | 2022-07-05 | 一汽解放汽车有限公司 | Vehicle control method, device, equipment and medium |
| CN114704638B (en) * | 2022-04-14 | 2023-08-22 | 一汽解放汽车有限公司 | Vehicle control method, device, equipment and medium |
| CN114754136A (en) * | 2022-04-28 | 2022-07-15 | 一汽解放汽车有限公司 | Sliding gear sleeve control method, automobile and computer readable storage medium |
| CN114754136B (en) * | 2022-04-28 | 2024-01-16 | 一汽解放汽车有限公司 | Sliding tooth sleeve control method, automobile and computer readable storage medium |
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