CN108869730B - Gear fault diagnosis and processing method - Google Patents
Gear fault diagnosis and processing method Download PDFInfo
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- CN108869730B CN108869730B CN201810789850.2A CN201810789850A CN108869730B CN 108869730 B CN108869730 B CN 108869730B CN 201810789850 A CN201810789850 A CN 201810789850A CN 108869730 B CN108869730 B CN 108869730B
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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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
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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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1256—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures characterised by the parts or units where malfunctioning was assumed or detected
- F16H2061/1272—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures characterised by the parts or units where malfunctioning was assumed or detected the failing part is a part of the final output mechanism, e.g. shift rods or forks
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Abstract
The invention provides a gear fault diagnosis and processing method, which comprises the following steps: when the preset judgment condition is met, judging the estimated meshing gear of the odd shaft and the even shaft of the transmission; monitoring the state of a shifting fork position sensor, judging the gear meshing condition under the current working condition by adopting the estimated meshing gear when the shifting fork position sensor is monitored to be invalid, and carrying out fault treatment; and judging the gear disengaging and engaging actions of the speed changer, judging whether the synchronizer is damaged or not by adopting the estimated engaging gear when the speed changer has gear engaging faults, and processing the faults. The invention can ensure the safety and reliability of the whole vehicle running in the gear fault processing process.
Description
Technical Field
The invention belongs to the field of control over a double-clutch automatic transmission, and relates to a gear fault diagnosis and processing method for an automatic transmission.
Background
The transmission is an important part of an automobile transmission system, directly influences the important performances of modern automobiles, such as the dynamic property, the fuel economy, the comfort, the maneuverability, the reliability and the like of the automobiles, and is one of important factors for determining the quality of the automobiles. The wet-type double-clutch automatic transmission control system carries out comprehensive judgment based on external input signals such as an accelerator, a brake and a vehicle speed of a driver to realize an automatic gear shifting process. If gear shifting fails due to mechanical reasons or sensor faults in the driving process, the fault judgment method and the fault processing mode directly influence the driving performance, the comfort and the safety.
Therefore, transmission fault diagnosis and processing are important components of a transmission electronic control system, and directly influence the operation of the transmission and the reliability of the whole vehicle in running.
Disclosure of Invention
Aiming at the technical problems, the invention provides a gear fault diagnosis and processing method which can not only realize fault judgment of synchronizer damage, but also can realize fault processing according to estimated meshing gear when a shifting fork position sensor fails so as to ensure that the power transmission of the whole vehicle is not interrupted in the gear fault processing process.
The technical scheme adopted by the invention is as follows:
the embodiment of the invention provides a gear fault diagnosis and processing method, which comprises the following steps:
when the preset judgment condition is met, judging the estimated meshing gear of the odd shaft and the even shaft of the transmission;
monitoring the state of a shifting fork position sensor, judging the gear meshing condition under the current working condition by adopting the estimated meshing gear when the shifting fork position sensor is monitored to be invalid, and carrying out fault treatment;
and judging the gear disengaging and engaging actions of the speed changer, judging whether the synchronizer is damaged or not by adopting the estimated engaging gear when the speed changer has gear engaging faults, and processing the faults.
Optionally, the preset determination condition is: the vehicle speed is greater than the vehicle speed threshold and the input shaft and output shaft speed sensors are fault-free.
Optionally, the performing of estimated meshing gear determination of the odd shaft and the even shaft of the transmission includes: and judging whether the judged gear is the estimated meshing gear of the shaft where the judged gear is located.
Optionally, the determining whether the determined gear is the estimated meshing gear of the shaft where the determined gear is located includes:
determining the synchronous speed of the gear to be judged according to the speed of the output shaft and the gear transmission ratio to be judged;
and judging whether the judged gear is the estimated meshing gear of the shaft in which the judged gear is located or not by calculating the deviation between the rotating speed of the clutch and the rotating speed of the judged gear synchronizer.
Optionally, the determining whether the determined gear is the estimated engagement gear by calculating the deviation between the clutch rotation speed and the determined gear synchronizer rotation speed includes:
calculating the deviation between the rotating speed of the clutch and the rotating speed of the gear synchronizer to be judged;
and determining whether the determined gear is the estimated engagement gear of the shaft on which the determined gear is located or not based on the deviation and the estimated engagement gear of the previous period of the shaft on which the determined gear is located.
Optionally, the determining whether the determined gear is the estimated engagement gear of the shaft on which the determined gear is located based on the deviation and the estimated engagement gear of the previous cycle of the shaft on which the determined gear is located includes:
if the judged gear is consistent with the estimated meshing gear of the previous period of the shaft where the judged gear is located, and the absolute value of the deviation is smaller than or equal to a preset first deviation limit value, judging that the judged gear is the estimated meshing gear of the shaft where the judged gear is located;
and if the judged gear is consistent with the estimated meshing gear of the previous period of the shaft where the judged gear is located and the absolute value of the deviation is greater than a preset first deviation limit value, judging that the estimated meshing gear of the shaft where the judged gear is located is a neutral gear.
Optionally, the determining whether the determined gear is the estimated engagement gear of the shaft on which the determined gear is located based on the deviation and the estimated engagement gear of the previous cycle of the shaft on which the determined gear is located further includes:
and if the judged gear is not consistent with the estimated meshing gear of the shaft on which the judged gear is located in the period, and if the absolute value of the deviation is less than or equal to a preset second deviation limit value, the judged gear is determined to be the estimated meshing gear of the shaft on which the judged gear is located.
Optionally, the preset first deviation limit is equal to a product of the synchronizer rotational speed of the determined gear and a preset first deviation coefficient, and the preset second deviation limit is equal to a product of the synchronizer rotational speed of the determined gear and a preset second deviation coefficient.
Optionally, monitor shift fork position sensor's state, monitoring shift fork position sensor is when failing, adopts it judges the fender position meshing condition under the current operating mode to predict the meshing fender position, and carry out fault handling and include:
when the shifting fork position sensor fails, if the estimated meshing gear of the corresponding shaft of the shifting fork is a neutral gear or an invalid value, judging that the actual meshing gear of the corresponding shaft of the shifting fork is the neutral gear, and judging that the fault state of the corresponding shaft of the shifting fork is a gear unavailable state, wherein the fault processing mode is to use the gear on the other shaft;
when the shifting fork position sensor fails, if the estimated meshing gear of the corresponding shaft of the shifting fork is a non-neutral gear, the fault state of the shaft is judged to be that the gear cannot be removed, and the estimated meshing gear and the gear on the other shaft are used as a fault processing mode.
Optionally, the determining the gear engaging and disengaging action of the transmission, when the transmission has a gear engaging fault, determining whether the fault that the synchronizer is damaged exists by estimating the gear engaging position, and performing fault processing includes:
on the premise that a shifting fork position sensor has no fault, when a fault of failed gear engagement occurs, judging an estimated meshing gear of a shaft where the fault gear is located, if the estimated meshing gear is a non-neutral gear and is inconsistent with the fault gear, judging that a synchronizer of the estimated meshing gear is damaged, judging that the shaft where the fault gear is located has a fault and is unavailable, and processing the fault in a mode that all gears of the shaft where the fault gear is located are unavailable and the gear on the other shaft is used;
and if the estimated meshing gear is a neutral gear or an invalid value, judging that the shaft of the failed gear has a failure type of gear non-hitchability, and processing the failure in a manner that all gears of the shaft of the failed gear are unavailable and the gear on the other shaft is used.
According to the gear fault diagnosis and processing method provided by the embodiment of the invention, on one hand, under the condition that a shifting fork position sensor fails, normal running of a vehicle can be ensured according to estimated meshing gears; on the other hand, whether a mechanical fault that the synchronizer is damaged exists can be diagnosed by estimating the meshing gear, and the gear shifting mode is adjusted according to the actual fault, so that the driving safety is ensured.
Drawings
Fig. 1 is a schematic flow chart of a gear fault diagnosis and processing method according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a specific gear fault diagnosis and processing method according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a shift fork position sensor fault handling process according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a synchronizer damage fault diagnosis and processing according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
In the embodiment of the invention, the gear fault diagnosis and processing method is used for judging the gear fault of the double-clutch automatic transmission, the transmission consists of 7 forward gears and 1 reverse gear, and the double-clutch automatic transmission further comprises 2 input shaft speed sensors, one output shaft speed sensor and 4 shifting fork position sensors, but the invention is not limited to the above.
Fig. 1 is a schematic flow chart of a gear fault diagnosis and processing method according to an embodiment of the present invention; fig. 2 is a schematic flowchart of a specific gear fault diagnosis and processing method according to an embodiment of the present invention; FIG. 3 is a flowchart illustrating a shift fork position sensor fault handling process according to an embodiment of the present invention; fig. 4 is a flowchart illustrating a synchronizer damage fault diagnosis and processing according to an embodiment of the present invention.
As shown in fig. 1 and fig. 2, a gear fault diagnosis and processing method provided by an embodiment of the present invention includes the following steps:
s101, judging estimated meshing gears of an odd shaft and an even shaft of the transmission when a preset judgment condition is met;
s102, monitoring the state of a shifting fork position sensor, judging the gear meshing condition under the current working condition by adopting the estimated meshing gear when the shifting fork position sensor is monitored to be invalid, and carrying out fault treatment;
s103, judging the gear engaging and disengaging action of the transmission, judging whether a synchronizer damage fault exists or not by adopting the estimated gear engaging position when the transmission has a gear engaging fault, and processing the fault.
Further, in the embodiment of the present invention, the preset determination condition is: the vehicle speed is greater than the vehicle speed threshold MinSpd and the input and output shaft speed sensors are fault-free. That is, in the present invention, the estimated engagement range determination is started only on the premise that the vehicle speed is greater than the vehicle speed threshold value and that none of the three rotational speed sensors of the transmission is faulty. In the invention, the vehicle speed threshold MinSpd is a calibration parameter.
In the present invention, the estimating the meshing gear of the odd shaft and the even shaft of the transmission includes: judging whether the judged gear is the estimated meshing gear of the shaft where the judged gear is located, and specifically comprising the following steps of:
step one, determining the synchronous rotating speed of the gear to be judged according to the rotating speed of the output shaft and the transmission ratio of the gear to be judged;
and step two, judging whether the judged gear is the estimated meshing gear of the shaft in which the judged gear is located by calculating the deviation between the rotating speed of the clutch and the rotating speed of the synchronizer of the judged gear.
The second step specifically comprises:
(1) calculating the deviation between the rotating speed of the clutch and the rotating speed of the gear synchronizer to be judged;
(2) and determining whether the determined gear is the estimated engagement gear of the shaft on which the determined gear is located or not based on the deviation and the estimated engagement gear of the previous period of the shaft on which the determined gear is located.
Wherein, the step (2) specifically comprises the following steps:
if the judged gear is consistent with the estimated meshing gear of the previous period of the shaft where the judged gear is located, and the absolute value of the deviation is smaller than or equal to a preset first deviation limit value, judging that the judged gear is the estimated meshing gear of the shaft where the judged gear is located;
and if the judged gear is consistent with the estimated meshing gear of the previous period of the shaft where the judged gear is located and the absolute value of the deviation is greater than a preset first deviation limit value, judging that the estimated meshing gear of the shaft where the judged gear is located is a neutral gear.
If the judged gear is not consistent with the estimated meshing gear of the previous period of the shaft where the judged gear is located, and when the absolute value of the deviation is smaller than or equal to a preset second deviation limit value, the judged gear is judged to be the estimated meshing gear of the shaft where the judged gear is located;
and if the judged gear is not consistent with the estimated meshing gear of the previous period of the shaft where the judged gear is located, and the absolute value of the deviation is greater than a preset second deviation limit value, the estimated meshing gear of the shaft where the judged gear is located is kept unchanged in the previous period.
In the embodiment of the present invention, the preset first deviation limit is equal to a product of the rotating speed of the synchronizer of the determined gear and a preset first deviation coefficient, and the preset second deviation limit is equal to a product of the rotating speed of the synchronizer of the determined gear and a preset second deviation coefficient. In one embodiment, to make the estimated gear more accurate, the first and second deviation coefficients may be 0.05.
It should be noted that the estimated engaging gear in the gear fault diagnosis and processing method provided by the present invention is determined periodically, for example, at a period of 10ms, and in each execution period, 8 gears of the transmission are sequentially determined, as shown in fig. 2. As shown in fig. 2, it is assumed that the gear to be shifted is i gear, i < ═ 8, which is on the axis j, and j represents the odd or even axis. On the premise that the vehicle speed is greater than MinSpd and the three speed sensors have no fault, the estimated meshing gear is judged, and the judging steps are as follows:
s201, calculating the rotating speed Spdsyn of the synchronizer of the gear i.
The synchronizer speed Spdsyn is: spdsyn ═ OutputSpeed/ig, where OutputSpeed represents the output shaft speed and ig represents the gear ratio for gear i.
S202, calculating the deviation SpdDelta of the rotating speed of the clutch and the rotating speed of the synchronizer of the gear to be judged
The deviation SpdDelta is: SpdDelta ═ Spdsyn-CltSpd |, where CltSpd represents clutch speed.
S203, calculating a first deviation limit ResetLimit and calculating a second deviation limit SetLimit
Wherein the first deviation limit ResetLimit is SpdSyn×Preset，PresetFor the coefficient of variation, this value is set herein to 0.05. Second deviation limit SetLimit ═ SpdSyn×Pset，PresetFor the coefficient of variation, this value is set herein to 0.05.
S204, judging the consistency of the estimated gear of a period on the i-axis and the j-axis of the gear to be judged, the size of the deviation SpdDelta and the first deviation limit ResetLimit and the size of the calculated second deviation limit SetLimit, and specifically comprising the following steps:
when the estimated gear i is consistent with the estimated meshing gear of the previous period of the j axis, if SpdDelta < ═ ResetLimit, the estimated meshing gear of the j axis is the gear i; and if SpdDelta is greater than ResetLimit, the estimated meshing gear of the j axis is neutral.
When the estimated meshing gear of the j axis is inconsistent with the estimated meshing gear of the previous period of the j axis, if SpdDelta < ═ SetLimit, the estimated meshing gear of the j axis is the gear i; if SpdDelta > SetLimit, the j axis keeps the estimated meshing gear of the previous period unchanged.
Further, monitor shift fork position sensor's state, when monitoring shift fork position sensor is out of work, adopt it judges the fender position meshing condition under the current operating mode to predict the meshing fender position, and carry out fault handling and include:
when the shifting fork position sensor fails, if the estimated meshing gear of the corresponding shaft of the shifting fork is a neutral gear or an invalid value, judging that the actual meshing gear of the corresponding shaft of the shifting fork is the neutral gear, and judging that the fault state of the corresponding shaft of the shifting fork is a gear unavailable state, wherein the fault processing mode is to use the gear on the other shaft;
when the shifting fork position sensor fails, if the estimated meshing gear of the corresponding shaft of the shifting fork is a non-neutral gear, the fault state of the corresponding shaft of the shifting fork is judged to be that the gear cannot be removed, and the failure processing mode is to use the estimated meshing gear and the gear on the other shaft.
Assuming a fork k position sensor fails, the fork is on the j axis, as shown in fig. 2.
If the estimated meshing gear of the j shaft is an invalid value or a neutral gear, the fault state of the j shaft is judged to be a gear unavailable state, the actual meshing gear of the j shaft is the neutral gear (no valid gear), and if the gear is in fault, the control system only uses the gear on the other shaft in the driving process.
If the estimated meshing gear of the j shaft is a non-neutral gear i, the actual meshing gear of the j shaft is determined to be the estimated meshing gear, the fault state of the j shaft is determined to be a gear non-removable state, and if the fault occurs, the control system only uses the gear i and a gear on the other shaft in the driving process.
Further, the gear engaging and disengaging action of the transmission is judged, when the transmission has gear engaging faults, the estimated gear engaging position is adopted to judge whether faults that the synchronizer is damaged exist, and fault processing comprises the following steps:
on the premise that a shifting fork position sensor has no fault, when a fault of failed gear engagement occurs, judging an estimated meshing gear of a shaft where the fault gear is located, if the estimated meshing gear is a non-neutral gear and is inconsistent with the fault gear, judging that a synchronizer of the estimated meshing gear is damaged, judging that the fault type of the shaft where the fault gear is located is a gear unavailable, and processing the fault in a mode that all gears of the shaft where the fault gear is located are unavailable and a gear on the other shaft is used;
and if the estimated meshing gear is a neutral gear or an invalid value, judging that the fault type of the shaft where the fault gear is located is that the gear cannot be engaged, and processing the fault in a mode that all gears of the shaft where the fault gear is located are unavailable and the gear on the other shaft is used.
That is, in the present invention, the synchronizer damage fault enable condition is judged: and a gear engaging failure fault occurs in the system, and the fault gear is a non-neutral gear.
Specifically, as shown in fig. 3, on the premise that the shift fork position sensor has no fault, when a fault that the shift fork fails to engage is generated, an estimated engaging gear of a shaft k where a fault gear i is located is determined, if the estimated engaging gear j is a non-neutral gear and is inconsistent with the fault gear, it is determined that a synchronizer of the estimated engaging gear is damaged, a fault type of the shaft where the fault gear i is located is a gear unavailable, a fault processing mode is that all gears of the shaft j where the fault gear is located are unavailable, and the control system uses a gear on the other shaft.
If the estimated meshing gear j is a neutral gear or an invalid value, the synchronizer is judged to be not damaged, the fault type of the shaft where the fault gear is located is the gear which can not be hung, the fault processing mode is that all gears of the shaft k where the fault gear is located are unavailable, and the control system uses the gear on the other shaft.
The above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A gear fault diagnosis and processing method is characterized by comprising the following steps:
when the preset judgment condition is met, judging the estimated meshing gear of the odd shaft and the even shaft of the transmission;
monitoring the state of a shifting fork position sensor, judging the gear meshing condition under the current working condition by adopting the estimated meshing gear when the shifting fork position sensor is monitored to be invalid, and carrying out fault treatment;
judging the gear engaging and disengaging action of the transmission, judging whether a synchronizer damage fault exists or not by adopting the estimated engaging gear when the transmission has a gear engaging fault, and performing fault treatment;
wherein the preset judgment condition is as follows: the vehicle speed is greater than the vehicle speed threshold value, and the input shaft and the output shaft rotating speed sensors have no faults;
wherein, monitor shift fork position sensor's state, monitoring shift fork position sensor when failing, adopt it judges the fender position meshing condition under the current operating mode to predict the meshing fender position, and carry out fault handling and include: when the shifting fork position sensor fails, if the estimated meshing gear of the corresponding shaft of the shifting fork is a neutral gear or an invalid value, judging that the actual meshing gear of the corresponding shaft of the shifting fork is the neutral gear, and judging that the fault state of the corresponding shaft of the shifting fork is a gear unavailable state, wherein the fault processing mode is to use the gear on the other shaft; when the shifting fork position sensor fails, if the estimated meshing gear of the corresponding shaft of the shifting fork is a non-neutral gear, the fault state of the shaft is judged to be that the gear cannot be picked, and the failure processing mode is to use the estimated meshing gear and the gear on the other shaft;
wherein, the action of picking the gear and putting into gear to the derailleur is judged, when the derailleur has the trouble of putting into gear, adopts it judges whether there is the trouble that the synchronous ware damaged to predict the meshing position to carry out fault handling and include: on the premise that a shifting fork position sensor has no fault, when a fault of failed gear engagement occurs, judging an estimated meshing gear of a shaft where the fault gear is located, if the estimated meshing gear is a non-neutral gear and is inconsistent with the fault gear, judging that a synchronizer of the estimated meshing gear is damaged, judging that the shaft where the fault gear is located has a fault and is unavailable, and processing the fault in a mode that all gears of the shaft where the fault gear is located are unavailable and the gear on the other shaft is used; and if the estimated meshing gear is a neutral gear or an invalid value, judging that the shaft of the failed gear has a failure type of gear non-hitchability, and processing the failure in a manner that all gears of the shaft of the failed gear are unavailable and the gear on the other shaft is used.
2. The gear fault diagnosis and processing method according to claim 1, wherein the performing estimated meshing gear determination of the odd and even shafts of the transmission comprises: and judging whether the judged gear is the estimated meshing gear of the shaft where the judged gear is located.
3. The gear fault diagnosis and processing method according to claim 2, wherein the step of judging whether the gear to be judged is the estimated meshing gear of the shaft in which the gear to be judged is located comprises the steps of:
determining the synchronous speed of the gear to be judged according to the speed of the output shaft and the gear transmission ratio to be judged;
and judging whether the judged gear is the estimated meshing gear of the shaft in which the judged gear is located or not by calculating the deviation between the rotating speed of the clutch and the rotating speed of the judged gear synchronizer.
4. The gear fault diagnosis and processing method according to claim 3, wherein the determining whether the determined gear is the estimated engagement gear by calculating the deviation between the clutch rotation speed and the determined gear synchronizer rotation speed comprises:
calculating the deviation between the rotating speed of the clutch and the rotating speed of the gear synchronizer to be judged;
and determining whether the determined gear is the estimated engagement gear of the shaft on which the determined gear is located or not based on the deviation and the estimated engagement gear of the previous period of the shaft on which the determined gear is located.
5. The gear fault diagnosis and processing method according to claim 4, wherein the determining whether the determined gear is the estimated engagement gear of the shaft on which the determined gear is located based on the deviation and the estimated engagement gear of the previous cycle of the shaft on which the determined gear is located comprises:
if the judged gear is consistent with the estimated meshing gear of the previous period of the shaft where the judged gear is located, and the absolute value of the deviation is smaller than or equal to a preset first deviation limit value, judging that the judged gear is the estimated meshing gear of the shaft where the judged gear is located;
and if the judged gear is consistent with the estimated meshing gear of the previous period of the shaft where the judged gear is located and the absolute value of the deviation is greater than a preset first deviation limit value, judging that the estimated meshing gear of the shaft where the judged gear is located is a neutral gear.
6. The gear fault diagnosis and processing method according to claim 5, wherein the determining whether the determined gear is the estimated engagement gear of the shaft on which the determined gear is located based on the deviation and the estimated engagement gear of the previous cycle of the shaft on which the determined gear is located further comprises:
and if the judged gear is not consistent with the estimated meshing gear of the shaft on which the judged gear is located in the period, and if the absolute value of the deviation is less than or equal to a preset second deviation limit value, the judged gear is determined to be the estimated meshing gear of the shaft on which the judged gear is located.
7. The gear fault diagnosis and processing method according to claim 6, wherein the preset first deviation limit is equal to the product of the synchronizer rotational speed of the determined gear and a preset first deviation coefficient, and the preset second deviation limit is equal to the product of the synchronizer rotational speed of the determined gear and a preset second deviation coefficient.
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| JPH084796A (en) * | 1994-06-15 | 1996-01-09 | Aisin Seiki Co Ltd | Clutch control device |
| JP3984237B2 (en) * | 2004-04-20 | 2007-10-03 | 本田技研工業株式会社 | Actuator control device |
| CN103386967B (en) * | 2012-05-08 | 2016-01-13 | 上海捷能汽车技术有限公司 | For control method and the power system of automatic transmission with hydraulic torque converter |
| CN104373595B (en) * | 2013-08-13 | 2017-03-01 | 上海通用汽车有限公司 | The gear recognition methodss of automatic mechanical transmission AMT and method for diagnosing faults |
| CN104019216B (en) * | 2014-05-14 | 2017-01-11 | 潍柴动力股份有限公司 | Method and device for controlling AMT gear selecting and shifting executing mechanism |
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