CN115045928B

CN115045928B - Clutch torque transmission abnormality detection method and device, medium and electronic equipment

Info

Publication number: CN115045928B
Application number: CN202210669246.2A
Authority: CN
Inventors: 王明玉; 宁甲奎; 孙鹏远; 曹龙; 朱桂庆; 刘国栋
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2024-03-26
Anticipated expiration: 2042-06-14
Also published as: CN115045928A

Abstract

The embodiment of the application discloses a method, a device, a medium and electronic equipment for detecting clutch torque transmission abnormality. The method comprises the following steps: under the target working state, the oil filling and draining operation is carried out on the clutch to be tested of the vehicle to be tested; the target working state is determined based on a clutch torque transmission detection condition; in the oil filling and draining process, monitoring the actual hydraulic pressure applied to the clutch to be tested, and obtaining a hydraulic pressure change record; acquiring the engine speed and the clutch speed of the vehicle to be detected under the condition that the hydraulic pressure change record is matched with the preset hydraulic pressure change; and determining a torque transmission detection result of the clutch to be detected according to the engine rotating speed and the clutch rotating speed. According to the technical scheme, the accuracy of detection of the clutch torque transmission abnormality can be improved, and driving safety is guaranteed.

Description

Clutch torque transmission abnormality detection method and device, medium and electronic equipment

Technical Field

The application relates to the technical field of computer application, in particular to a method, a device, a medium and electronic equipment for detecting clutch torque transmission abnormality.

Background

The double-clutch transmission performs pressure control on the clutch through the clutch electromagnetic valve, and realizes engine torque transmission through the clutch to provide power for the whole vehicle. Unexpected transmission of engine torque can be caused by abnormal torque transmission of the clutch, unexpected movement of the vehicle occurs, and even unexpected running of the vehicle occurs, so that safety accidents occur. The clutch torque transmission abnormality detection is carried out to timely find out the clutch torque transmission abnormality, and the method has important significance for avoiding the occurrence of safety accidents and ensuring the driving safety.

In the related art, in a step of testing a transmission assembly bench, a torque sensor is added at the rear end of a transmission, and abnormality detection is performed on clutch torque transmission based on the torque sensor. However, in practice, there is no additional torque sensor for detecting clutch torque transfer under the vehicle conditions.

Disclosure of Invention

The application provides a clutch torque transmission abnormality detection method, a device, a medium and electronic equipment, which can achieve the purposes of improving the detection accuracy of the clutch torque transmission abnormality and ensuring the driving safety.

According to a first aspect of the present application, there is provided a clutch torque transfer abnormality detection method, the method comprising:

Under the target working state, the oil filling and draining operation is carried out on the clutch to be tested of the vehicle to be tested; the target working state is determined based on a clutch torque transmission detection condition;

in the oil filling and draining process, monitoring the actual hydraulic pressure applied to the clutch to be tested, and obtaining a hydraulic pressure change record;

acquiring the engine speed and the clutch speed of the vehicle to be detected under the condition that the hydraulic pressure change record is matched with the preset hydraulic pressure change;

and determining a torque transmission detection result of the clutch to be detected according to the engine rotating speed and the clutch rotating speed.

According to a second aspect of the present application, there is provided a clutch torque transmission abnormality detection device, the device comprising:

the oil filling and draining operation execution module is used for carrying out oil filling and draining operation on the clutch to be detected of the vehicle to be detected in the target working state; the target working state is determined based on a clutch torque transmission detection condition;

the actual hydraulic monitoring module is used for monitoring the actual hydraulic pressure applied to the clutch to be tested in the oil filling and draining process and obtaining a hydraulic change record;

the rotating speed data acquisition module is used for acquiring the rotating speed of the engine and the rotating speed of the clutch of the vehicle to be detected under the condition that the hydraulic change record is matched with the preset hydraulic change;

The clutch torque transmission abnormality detection method comprises a processor and a computer program which is stored in a memory and can be run by the processor, wherein the processor realizes the clutch torque transmission abnormality detection method according to the embodiment of the application when executing the computer program.

According to the technical scheme, oil filling and draining operations are carried out on the clutch to be detected of the vehicle to be detected in the target working state; in the oil filling and draining process, monitoring the actual hydraulic pressure applied to the clutch to be tested, and obtaining a hydraulic pressure change record; acquiring the engine speed and the clutch speed of the vehicle to be detected under the condition that the hydraulic pressure change record is matched with the preset hydraulic pressure change; and determining a torque transmission detection result of the clutch to be detected according to the engine rotating speed and the clutch rotating speed. According to the method and the device, based on the acquired engine rotating speed and the acquired clutch rotating speed, the torque transmission detection result of the clutch to be detected is determined, the accuracy of the torque transmission detection of the clutch is guaranteed, the torque transmission abnormality detection of the clutch is realized under the condition that an additional sensor is not added in the whole vehicle, the torque transmission abnormality detection cost of the clutch is reduced, the driving safety is effectively guaranteed, and the user experience is improved.

It should be understood that the description of this section is not intended to identify key or critical features of the embodiments of the application or to delineate the scope of the application. Other features of the present application will become apparent from the description that follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a method for detecting clutch torque transfer anomalies according to a first embodiment;

fig. 2 is a flowchart of a clutch torque transfer abnormality detection method according to a second embodiment;

FIG. 3A is a flow chart of a clutch torque transfer anomaly detection method provided according to a third embodiment;

FIG. 3B (a) shows the clutch actual speed over time during oil fill and drain;

FIG. 3B (B) shows the actual clutch hydraulic pressure versus time during oil fill and drain;

FIG. 3B (c) shows the output flow rate of the clutch cooling solenoid valve over time during both the oil fill and drain processes;

fig. 4 is a schematic structural diagram of a clutch torque transmission abnormality detection device according to a fourth embodiment of the present application;

fig. 5 is a schematic structural diagram of an electronic device according to a fifth embodiment of the present application.

Detailed Description

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," "target," and "candidate" in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example 1

Fig. 1 is a flowchart of a clutch torque transmission abnormality detection method according to an embodiment, which is applicable to the case of abnormality detection of clutch torque transmission, and the method may be performed by a clutch torque transmission abnormality detection device that may be implemented in hardware and/or software and may be integrated in an electronic device that operates the system.

As shown in fig. 1, the method includes:

s110, under the target working state, oil filling and draining operations are carried out on the clutch to be detected of the vehicle to be detected.

The target working state is determined based on a clutch torque transmission detection condition. The target operating state refers to a vehicle operating state that satisfies a clutch torque transmission detection condition. The clutch torque transmission is detected under the clutch torque detection condition, unexpected movement of the vehicle caused by torque transmission detection can be avoided, the safety of the clutch torque detection process is ensured, and meanwhile, the accuracy of clutch torque transmission abnormality detection can be ensured. Alternatively, the target operating state is a state in which the vehicle remains stationary and the engine is idling. Further, the target operating state also relates to a transmission oil temperature state, a transmission shift fork position, and an output flow state of the clutch cooling solenoid valve.

The vehicle to be detected refers to a vehicle for which clutch torque abnormality detection is required. The clutch which needs torque transmission detection in the vehicle to be detected is the clutch to be detected. The clutch to be tested is a wet clutch. It is known that the engagement and disengagement of the clutch to be tested is achieved by controlling the oil filling operation and the oil draining operation of the clutch, wherein the oil filling operation causes the hydraulic pressure to rise so as to cause the clutch to engage and thereby transmit the torque of the engine, and power the whole vehicle. The oil drainage operation causes the hydraulic pressure to drop, and the clutch is promoted to be separated so as to interrupt the torque transmission of the engine and cut off the power of the whole vehicle. Detecting abnormal torque transmission of the clutch, specifically, detecting whether the clutch to be detected can be combined or not by executing oil filling operation, and normally transmitting the torque of the engine; by performing the draining operation, it is detected whether the clutch under test can be disengaged, and torque transmission is normally terminated.

In an alternative embodiment, the under-test clutch includes: odd clutches and even clutches.

The double-clutch transmission comprises an odd clutch and an even clutch, wherein the odd clutch is a clutch responsible for an odd gear, and the even clutch is a clutch responsible for an even gear. Wherein, the odd clutch and the even clutch are both wet clutches. The odd clutch and the even clutch are both clutches cooled with oil. In the case of disposing a wet dual clutch transmission in a vehicle to be detected, clutch torque transmission detection is performed for an odd clutch and an even clutch in the dual clutch transmission, respectively. The odd clutch and the even clutch are only responsible for different vehicle gear positions, and the clutch torque transmission detection process of the odd clutch is consistent with the clutch torque transmission detection process of the even clutch. The technical scheme can be suitable for detecting the clutch torque transmission abnormality of the vehicle to be detected provided with the wet double-clutch transmission, and improves the applicability of the clutch torque transmission abnormality detection method.

And S120, monitoring the actual hydraulic pressure applied to the clutch to be tested in the oil filling and draining process, and obtaining a hydraulic pressure change record.

The oil filling operation causes the hydraulic pressure to rise, and the oil draining operation causes the hydraulic pressure to drop. And in the oil filling process and the oil draining process, monitoring the actual hydraulic pressure applied to the clutch to be tested respectively to obtain a hydraulic pressure change record corresponding to the oil filling process and a hydraulic pressure change record corresponding to the oil draining process respectively.

And S130, acquiring the engine rotating speed and the clutch rotating speed of the vehicle to be detected under the condition that the hydraulic pressure change record is matched with the preset hydraulic pressure change.

The hydraulic pressure change record is used to record hydraulic pressure value changes in the time dimension. The hydraulic pressure change record includes a hydraulic pressure change record corresponding to a hydraulic pressure rising stage and a hydraulic pressure change record corresponding to a hydraulic pressure falling stage.

Wherein the preset hydraulic pressure change is predetermined according to an actual vehicle experiment. The preset hydraulic pressure variation is used to define a hydraulic pressure value variation in the time dimension. Correspondingly, the preset hydraulic pressure change also comprises a first preset hydraulic pressure change record corresponding to the hydraulic pressure rising stage and a second preset hydraulic pressure change corresponding to the hydraulic pressure falling stage.

And for the first preset hydraulic change, determining a hydraulic change trend of the clutch to be tested for combination in a hydraulic rising stage, and under the condition that the hydraulic change record is matched with the preset hydraulic change, theoretically combining the clutch to be tested, gradually and normally transmitting the engine torque, wherein the engine rotating speed and the clutch rotating speed are synchronous.

And for the second preset hydraulic change, determining a hydraulic change trend of the clutch to be tested for disengagement in a hydraulic pressure falling stage, and under the condition that the hydraulic change record is matched with the preset hydraulic change, theoretically disengaging the clutch to be tested, gradually cutting off the transmission of the engine torque, wherein the engine rotating speed and the clutch rotating speed are not synchronous any more.

Next, step S130 will be explained from two hydraulic pressure change phases, namely, a hydraulic pressure rising phase and a hydraulic pressure falling phase.

First, step S130 will be described with respect to the hydraulic pressure rising stage. Under the condition that the hydraulic pressure change record is matched with the preset hydraulic pressure change, the engine rotating speed and the clutch rotating speed of the vehicle to be detected are obtained, and concretely, under the condition that the hydraulic pressure change record is matched with the preset hydraulic pressure change in the hydraulic pressure rising stage, the actual engine rotating speed and the clutch rotating speed of the vehicle to be detected are obtained. Whether the engine speed and the clutch speed are in rotational speed synchronization is determined based on the actual engine speed and the clutch speed.

Optionally, the first preset hydraulic pressure change corresponding to the hydraulic pressure rising phase includes: a first pressure threshold and a first time threshold. The hydraulic pressure change record is matched with the preset hydraulic pressure change in the hydraulic pressure rising stage, and specifically, the duration of the hydraulic pressure value which is larger than or equal to the first pressure threshold value in the hydraulic pressure change record is larger than or equal to the first time threshold value. The first pressure threshold and the first time threshold are both determined according to actual service requirements, and are not limited herein. Preferably, the first pressure threshold is determined as the half-tie-up position of the oncoming clutch, e.g., the first pressure threshold is assigned to 2.5bar. Illustratively, the first time threshold is 1 second.

Next, step S130 will be described with respect to the hydraulic pressure drop stage. Under the condition that the hydraulic pressure change record is matched with the preset hydraulic pressure change, the engine rotating speed and the clutch rotating speed of the vehicle to be detected are obtained, and concretely, under the condition that the hydraulic pressure change record is matched with the preset hydraulic pressure change in the hydraulic pressure descending stage, the actual engine rotating speed and the clutch rotating speed of the vehicle to be detected are obtained. Based on the actual engine speed and the clutch speed, it is determined whether the clutch to be tested begins to disengage, and whether the engine speed and the clutch speed are no longer in rotational synchronization.

Optionally, the second preset hydraulic pressure change corresponding to the hydraulic pressure drop phase includes: a second pressure threshold and a second time threshold. The hydraulic pressure change record is matched with the preset hydraulic pressure change in the hydraulic pressure descending stage, specifically, the hydraulic pressure value of the hydraulic pressure change record is smaller than or equal to a second pressure threshold value, and the duration time is larger than or equal to a second time threshold value. The second pressure threshold and the second time threshold are both determined according to actual service requirements, and are not limited herein. For example, the second pressure threshold is determined to be 0.8bar. The second time threshold is determined to be 0.4 seconds.

It is noted that the first and second pressure thresholds, and the first and second time thresholds, are merely for distinguishing between hydraulic pressure change phases, and that there is no necessarily a magnitude relationship between the first and second pressure thresholds, and between the first and second time thresholds.

And S140, determining a torque transmission detection result of the clutch to be detected according to the engine rotating speed and the clutch rotating speed.

The clutch to be tested has different degrees of engagement corresponding to different torque transmissions. Torque transfer differences can affect the relative magnitude relationship of engine speed and clutch speed, as well as the rate of change of clutch speed. And according to the rotation speed of the engine and the rotation speed of the clutch, the torque transmission detection result of the clutch to be detected can be determined. Optionally, the clutch engagement anomaly is detected based on a relative magnitude relationship of the engine speed and the clutch speed. In the case where the clutch engagement is normal, a clutch disengagement abnormality is detected based on the rate of change of the clutch rotational speed.

In an alternative embodiment, after determining a torque transmission detection result of the clutch under test according to the engine speed and the clutch speed, the method includes: if the torque transmission detection result is abnormal, updating the torque transmission state of the clutch corresponding to the clutch to be detected into a torque transmission abnormal state; and limiting the transmission gear corresponding to the clutch to be tested and limiting the engine torque.

The torque transmission detection result of the clutch to be detected comprises: the torque transmission detection is abnormal and the torque transmission detection is normal. If the torque transmission detection result is abnormal, the torque transmission state of the clutch corresponding to the clutch to be detected needs to be updated into the abnormal torque transmission state. And under the condition that the number of the clutches to be tested is larger than one, for example, under the condition that the clutches comprise odd clutches and even clutches, the clutch torque transmission state of the clutch to be tested with abnormal torque transmission detection is updated to be in a torque transmission abnormal state, and for example, if the torque transmission detection result of the odd clutches is in the torque transmission detection abnormal state, the clutch torque transmission state corresponding to the odd clutches is updated to be in the torque transmission abnormal state. If the torque transmission detection result of the even clutch is abnormal, the torque transmission state of the clutch corresponding to the even clutch is updated to be abnormal.

Optionally, if the torque transmission detection result corresponding to the clutch to be detected is that the torque transmission detection is normal, updating the torque transmission state of the clutch corresponding to the clutch to be detected to be a normal torque transmission state; if the torque transmission abnormality detection is not performed on the clutch to be detected, the torque transmission state of the clutch corresponding to the clutch to be detected is not modified, and the torque transmission state of the clutch is kept consistent with the torque transmission detection result obtained by the previous torque transmission abnormality detection of the clutch.

The clutch torque transmission state is updated to be the clutch torque transmission state corresponding to the clutch to be tested, and specifically, the clutch torque transmission abnormality DTC (Diagnostic Trouble Code, diagnosis fault code) is stored in the TCU (Telematics Control Unit, remote information control unit). And reading the clutch torque transmission abnormality DTC stored in the TCU at the time of powering up the TCU, and setting a clutch torque transmission state identification bit according to the clutch torque transmission abnormality DTC.

And limiting the transmission gear corresponding to the clutch to be tested, limiting the engine torque, specifically, under the condition that the number of the clutches to be tested is larger than one, for example, under the condition that the clutches to be tested comprise an odd clutch and an even clutch, determining that the torque transmission detection result is the clutch to be tested with abnormal torque transmission detection, limiting the transmission gear corresponding to the clutch to be tested, taking the torque transmission detection result of the odd clutch as an example, limiting the use of the odd shaft gear of the transmission, controlling all shifting forks of the odd gear of the transmission to be in neutral gear, and taking the transmission 1 gear, 3 gear, 5 gear and 7 gear as neutral gears as examples. And when the transmission is used for carrying out limp-home running of the vehicle, the TCU limits the highest gear of the even shaft to be in a set gear range, and limits the engine torque to be in a set torque range through a CAN (Controller Area Network ) bus, so that the safety of the vehicle is further ensured. The set gear range and the set torque range are determined according to actual service requirements, and are not limited herein. For example, the torque range is set to 50% of the maximum engine torque.

Optionally, under the condition that the torque transmission detection result of the clutch to be detected is abnormal, the control turns on a transmission fault lamp corresponding to the clutch to be detected so as to warn a driver that the vehicle breaks down and prompt the driver to overhaul the vehicle in time.

According to the technical scheme, under the condition that the torque transmission detection result is abnormal, a processing scheme of clutch torque transmission abnormality is provided, and the torque transmission state of the clutch corresponding to the clutch to be detected is updated to be in a torque transmission abnormality state; the transmission gear corresponding to the clutch to be tested is limited, the engine torque is limited, the driving safety risk possibly caused by abnormal torque transmission of the clutch is reduced, and the driving safety is ensured.

Example two

Fig. 2 is a flowchart of a clutch torque transfer abnormality detection method according to the second embodiment. The embodiment is further optimized based on the embodiment, and in particular, the operation of determining the torque transmission detection result of the clutch to be tested according to the engine rotating speed and the clutch rotating speed is refined.

As shown in fig. 2, the method includes:

and S210, under the target working state, performing oil filling and draining operation on the clutch to be tested of the vehicle to be tested.

And S220, monitoring the actual hydraulic pressure applied to the clutch to be tested in the oil filling and draining process, and obtaining a hydraulic pressure change record.

And S230, acquiring the engine rotating speed and the clutch rotating speed of the vehicle to be detected under the condition that the hydraulic pressure change record is matched with the preset hydraulic pressure change.

S240, determining a relative rotational speed deviation between the engine rotational speed and the clutch rotational speed.

Wherein the relative rotational speed deviation is used to measure the degree of deviation between the engine rotational speed and the clutch rotational speed. A relative rotational speed deviation between the engine rotational speed and the clutch rotational speed is determined, and specifically, a rotational speed difference between the engine rotational speed and the clutch rotational speed may be calculated.

S250, determining a relative magnitude relation between the relative rotation speed deviation and a preset rotation speed deviation threshold value.

The preset rotational speed deviation threshold is used for measuring whether the clutch rotational speed and the engine rotational speed are synchronous, and can be further determined through vehicle calibration, and is not limited herein. The preset rotational speed deviation threshold is, for example, 10rpm.

The relative rotational speed deviation may include a relative rotational speed deviation belonging to the hydraulic pressure increasing phase and a relative rotational speed deviation belonging to the hydraulic pressure decreasing phase, corresponding to the hydraulic pressure increasing phase and the hydraulic pressure decreasing phase of the oil charging and discharging operation. Correspondingly, the preset rotational speed deviation threshold value comprises a first preset rotational speed deviation threshold value corresponding to a hydraulic pressure rising stage and a second preset rotational speed deviation threshold value corresponding to a hydraulic pressure falling stage.

Determining a first relative magnitude relation between the relative rotational speed deviation and a first preset rotational speed deviation threshold for the hydraulic pressure rising stage; for the hydraulic pressure drop phase, a first relative magnitude relation of the relative rotational speed deviation and a second preset rotational speed deviation threshold value is determined.

If the relative rotational speed deviation is smaller than the preset rotational speed deviation threshold value, the clutch to be tested can be determined to be normally combined, and torque can be normally transmitted. Specifically, the first relative rotational speed deviation is smaller than a first preset rotational speed deviation threshold value, or the second relative rotational speed deviation is smaller than a second preset rotational speed deviation threshold value, so that the clutch to be tested can be determined to be normally combined, and torque can be normally transmitted to provide power for the vehicle. Wherein the first relative rotational speed deviation corresponds to a hydraulic pressure rising phase and the second relative rotational speed deviation corresponds to a hydraulic pressure falling phase. Preferably, in order to improve the resource utilization rate, whether the clutch to be tested can be normally combined or not can be determined according to the relative rotation speed deviation of any one of the hydraulic pressure rising stage or the hydraulic pressure falling stage. For example, it may be determined whether the clutch under test can be normally engaged only according to the first relative magnitude relation belonging to the hydraulic pressure rising stage; it is also possible to determine whether the clutch under test can be normally engaged or not based on only the second relative magnitude relation belonging to the hydraulic pressure decreasing stage.

If the relative rotational speed deviation is larger than a preset rotational speed deviation threshold value, it can be determined that the clutch to be tested has abnormal combination risk, and torque can not be normally transmitted to provide power for the vehicle. Under the condition, the preset hydraulic pressure change can be adjusted, specifically, a first pressure threshold corresponding to a hydraulic pressure rising stage or a second pressure threshold corresponding to a hydraulic pressure falling stage can be adjusted upwards, so that the actual hydraulic pressure applied to the clutch to be tested is enough to enable the clutch to be tested to be combined, and the abnormal judgment of clutch torque transmission caused by insufficient hydraulic pressure is avoided.

After the preset hydraulic pressure change is adjusted, under the condition that the obtained hydraulic pressure change record is matched with the adjusted preset hydraulic pressure change, the engine rotating speed and the clutch rotating speed of the vehicle to be detected are obtained, the steps S230 to S250 are continuously and sequentially executed, the relative magnitude relation between the relative rotating speed deviation and the preset rotating speed deviation threshold value is determined, if the relative rotating speed deviation is still larger than the preset rotating speed deviation threshold value, the clutch to be detected is combined abnormally, and the torque cannot be transmitted normally to provide power for the vehicle.

And S260, determining the actual rotation speed change rate of the clutch to be tested in a preset time interval based on the rotation speed of the clutch under the condition that the relative rotation speed deviation is smaller than the preset rotation speed deviation threshold value.

The clutch torque transmission abnormality can generally correspond to two cases, a clutch engagement abnormality and a clutch disengagement abnormality. According to the relative magnitude relation between the relative rotation speed deviation and the preset rotation speed deviation threshold value, detection of clutch combination abnormality can be achieved. The detection of clutch disengagement abnormality is performed in a case where the relative rotational speed deviation is smaller than a preset rotational speed deviation threshold. The relative rotational speed deviation is smaller than a preset rotational speed deviation threshold value, and corresponds to the situation that the clutch is normally combined and torque can be normally transmitted to provide power for the vehicle.

Specifically, the actual rotation speed change rate of the clutch to be tested in a preset time interval is determined, and whether the clutch is abnormal in separation or not is determined according to the actual rotation speed change rate. Wherein the preset time interval corresponds to a draining process. The oil drainage process corresponds to a hydraulic pressure descending stage, the hydraulic pressure is reduced to enable the clutch to be tested to be separated, the rotating speed of the clutch is reduced, and torque transmission is gradually cut off. The clutch release abnormality may be detected based on the actual rotational speed change rate determined in the hydraulic pressure drop stage, and whether there is a case where the engine torque is not expected to be transmitted.

The preset time interval is determined according to the actual service requirement, which is not limited herein, and optionally, the preset time interval belongs to the oil drainage process, and after the actual hydraulic pressure drops to the second pressure threshold, the time interval length of the preset time interval is determined according to the actual service requirement, which is not limited herein. And determining a time node corresponding to the second pressure threshold as a clutch release reference point, wherein the time interval length between the clutch release reference point and the time interval starting point of the preset time interval is larger than the second time threshold.

Determining the actual rotation speed change rate of the clutch to be tested in a preset time interval, specifically, acquiring the clutch rotation speed corresponding to the starting point of the time interval as a first clutch rotation speed, and acquiring the clutch rotation speed corresponding to the ending point of the time interval as a second clutch rotation speed, and calculating the actual rotation speed change rate of the clutch to be tested in the preset time interval according to the first clutch rotation speed, the second clutch rotation speed and the preset time interval. Specifically, a difference is made between the first clutch rotational speed and the second clutch rotational speed, and the ratio of the difference to the time interval length of the preset time interval is determined as the actual rotational speed change rate.

S270, determining a torque transmission detection result of the clutch to be detected according to the actual rotation speed change rate.

The actual rotation speed change rate is used for reflecting the separation condition of the clutch to be detected and determining whether the clutch to be detected is normally separated. And according to the actual rotation speed change rate, the torque transmission detection result of the clutch to be detected can be determined.

In an alternative embodiment, determining a torque transmission detection result of the clutch to be tested according to the actual rotation speed change rate includes: determining a rotation speed change rate reference interval corresponding to the target working state; and determining a torque transmission detection result of the clutch to be detected according to the actual rotation speed change rate and the rotation speed change rate reference interval.

The rotation speed change rate reference interval gives the rotation speed change rate range of the sensor to be detected in the separation process. The rotation speed change rate reference section corresponds to a target operation state, and optionally, in a case where the target operation state includes a transmission oil temperature state, the rotation speed change rate reference section corresponds to the transmission oil temperature state. Optionally, the speed change rate reference interval is also related to the type of clutch to be tested, that is, when the transmission oil temperature in the target operating state is the same, there is a difference between the speed change rate reference intervals corresponding to the odd clutch and the even clutch.

The rotating speed change rate reference section comprises a rotating speed change rate reference upper limit and a rotating speed change rate reference lower limit, the rotating speed change rate reference section is obtained through a transmission standard bench test in a target working state, and specifically, the rotating speed change rate reference section is obtained through the transmission standard bench test on an odd clutch and an even clutch respectively at different transmission oil temperatures.

For example, table 1 shows the correspondence between the rotational speed change rate reference interval and the transmission oil temperature state.

TABLE 1

And determining a torque transmission detection result of the clutch to be detected according to the actual rotation speed change rate and the rotation speed change rate reference interval, specifically, determining whether the actual rotation speed change rate falls into the rotation speed change rate reference interval, and if the actual rotation speed change rate falls into the rotation speed change rate reference interval, determining that the torque transmission detection result of the clutch to be detected is normal in torque transmission detection, so that the clutch to be detected can be normally separated, and the condition of abnormal torque transmission does not exist. If the actual rotation speed change rate is outside the rotation speed change rate reference interval, determining that the torque transmission detection result of the clutch to be detected is abnormal, wherein the abnormal torque transmission detection result indicates that the clutch to be detected cannot be normally separated, and the abnormal torque transmission condition can be caused.

According to the technical scheme, the rotating speed change rate reference interval corresponding to the target working state is determined; according to the actual rotation speed change rate and the rotation speed change rate reference interval, a torque transmission detection result of the clutch to be detected is determined, clutch torque abnormality detection is achieved, clutch torque abnormality can be found in time, and driving safety is guaranteed.

According to the technical scheme, the relative speed deviation between the engine speed and the clutch speed is determined, the relative magnitude relation between the relative speed deviation and the preset speed deviation threshold is determined, and the actual speed change rate of the clutch to be tested in the preset time interval is determined based on the clutch speed under the condition that the relative speed deviation is smaller than the preset speed deviation threshold; the preset time interval corresponds to an oil drainage process. And determining a torque transmission detection result of the clutch to be tested according to the actual rotation speed change rate. Whether the clutch to be detected is abnormal in separation or not is detected, the abnormal torque transmission condition can be found in time, the vehicle to be detected is prevented from running in an unexpected direction, and the occurrence risk of safety accidents is reduced.

Example III

Fig. 3A is a flowchart of a clutch torque transfer abnormality detection method according to the third embodiment. The embodiment is further optimized based on the embodiment, specifically, before the "oil filling and draining operation is performed on the clutch to be detected of the vehicle to be detected in the target working state", the additional operation "responds to the clutch torque transmission detection instruction to obtain the current working state of the vehicle to be detected; based on clutch torque transmission detection conditions, the current working state of the vehicle to be detected is adjusted, and the current working state is adjusted to be a target working state "

As shown in fig. 3A, the method includes:

s310, responding to a clutch torque transmission detection instruction, and acquiring the current working state of the vehicle to be detected.

The clutch torque transmission detection instruction is used for indicating that the clutch torque transmission abnormality detection is carried out on the clutch to be detected. Alternatively, the detection of the clutch torque transmission abnormality may be periodic, and exemplary, the detection period of the clutch torque transmission abnormality may be determined based on the vehicle to be detected as a driving range, and the driving range of the vehicle to be detected is determined as one detection period every driving range, for example, the vehicle to be detected performs the clutch torque transmission abnormality detection once every 2 ten thousand kilometers of the vehicle to be detected. Of course, the clutch torque abnormality detection may not be periodic, and a clutch torque abnormality detection command may be generated whenever there is a clutch torque abnormality detection demand.

The current working state refers to the working state of the vehicle to be detected at the current moment, and optionally, the current working state comprises a vehicle motion state, a transmission oil temperature state, a transmission shifting fork position, an output flow state of a clutch cooling electromagnetic valve and the like.

S320, adjusting the current working state of the vehicle to be detected based on the clutch torque transmission detection condition, and adjusting the current working state to be a target working state.

The clutch torque detection condition is used for determining a target working state, and the clutch torque transmission is detected under the clutch torque detection condition, so that unexpected movement of a vehicle caused by torque transmission detection can be avoided, the safety of the clutch torque transmission detection process is ensured, and the accuracy of abnormal clutch torque detection can be ensured.

The TCU adjusts the current working state of the vehicle to be detected based on the clutch torque transmission detection condition, and adjusts the current working state to be a target working state.

In an alternative embodiment, based on a clutch torque transmission detection condition, the current working state of the vehicle to be detected is adjusted, and the current working state is adjusted to be a target working state, including: based on the clutch torque transmission detection condition, adjusting the current motion state of the vehicle to be detected; based on the clutch torque transmission detection condition, adjusting the position of a transmission shifting fork of the vehicle to be detected; based on the clutch torque transmission detection condition, adjusting the output flow of a clutch cooling electromagnetic valve; wherein the current motion state comprises: at least one of vehicle travel speed, parking brake status, engine status, shift lever position, and transmission oil temperature.

The method comprises the steps of adjusting the current motion state of a vehicle to be detected based on the torque transmission detection condition of a clutch, and optionally adjusting the current motion state of the vehicle to be detected to a state that the vehicle is kept stationary and an engine is idle, so that unexpected movement of the vehicle caused by torque transmission detection is avoided, and the safety of the torque detection process of the clutch is ensured. Wherein the current motion state comprises: at least one of vehicle travel speed, parking brake status, engine status, shift lever position, and transmission oil temperature. The current motion state is adjusted, and specifically, the running speed of the vehicle can be adjusted to be zero; adjusting the parking brake state to be on; the engine state is adjusted to be a starting state, and optionally, the starting time of the engine is controlled to exceed the preset starting time; the shift lever position is adjusted to neutral or park. The gearbox oil temperature is adjusted to be within a set oil temperature range. And adjusting the current motion state of the vehicle to be detected to be in a static state or an idle state.

Based on clutch torque transmission detection conditions, the position of a transmission shifting fork of a vehicle to be detected is adjusted, specifically, the transmission shifting fork corresponding to a clutch to be detected in the vehicle to be detected is adjusted to be neutral, and under the condition that the clutch to be detected comprises an odd clutch and an even clutch, the odd shaft gear and the even shaft gear of the transmission corresponding to the odd clutch and the even clutch are both adjusted to be neutral. The transmission shifting fork is adjusted to be in neutral gear, and accidental shrugging of the vehicle in the oil filling process can be prevented.

The output flow of the clutch cooling electromagnetic valve is adjusted based on the clutch torque transmission detection condition, specifically, in the process of executing the oil filling operation, the output flow of the clutch cooling electromagnetic valve is controlled to be a set flow, and the set flow is determined according to the actual service requirement and is not limited herein. For example, the flow rate is set to 4 liters. In the process of executing the oil drainage operation, under the condition that the relative rotation speed deviation is smaller than the preset rotation speed deviation threshold value, the output flow of the clutch cooling electromagnetic valve is adjusted to be zero, the duration time for controlling the output flow of the clutch cooling electromagnetic valve to be zero is longer than the cooling flow control time threshold value, and therefore the influence of the dragging torque of the clutch on the detection of the clutch torque transmission abnormality can be avoided, and the accuracy of the detection of the clutch torque transmission abnormality is guaranteed.

According to the technical scheme, the current motion state of the vehicle to be detected, the position of the shifting fork of the transmission and the output flow of the clutch cooling electromagnetic valve are adjusted based on the clutch torque transmission detection conditions, so that the safety of the clutch torque detection process is ensured, and the accuracy of clutch torque detection is also ensured.

S330, under the target working state, the oil filling and draining operation is carried out on the clutch to be detected of the vehicle to be detected.

And S340, monitoring the actual hydraulic pressure applied to the clutch to be tested in the oil filling and draining process, and obtaining a hydraulic pressure change record.

And S350, acquiring the engine rotating speed and the clutch rotating speed of the vehicle to be detected under the condition that the hydraulic pressure change record is matched with the preset hydraulic pressure change.

S360, determining a torque transmission detection result of the clutch to be detected according to the engine rotating speed and the clutch rotating speed.

According to the technical scheme, before the clutch torque transmission abnormality detection is carried out, the current working state of the vehicle to be detected is adjusted based on the clutch torque transmission detection conditions, and the current working state is adjusted to be the target working state, so that the safety of the clutch torque transmission detection process is guaranteed, and the accuracy of the clutch torque abnormality detection is also guaranteed.

In a specific embodiment, when the clutch to be tested includes an odd clutch and an even clutch, clutch torque transmission abnormality detection is performed on the odd clutch and the even clutch respectively, the clutch torque transmission abnormality detection flows of the odd clutch and the even clutch are consistent, the clutch torque transmission abnormality detection flows are described by taking the odd clutch as an example, and the clutch torque transmission abnormality detection flows for the even clutch are not described again.

Firstly, judging whether the current working state of the vehicle to be detected is a target working state, and under the condition that the current working state of the vehicle to be detected is the target working state, performing oil filling operation and oil draining operation on an odd clutch of the vehicle to be detected. Specifically, the oil filling operation is performed first and then the oil draining operation is performed, and fig. 3B (a) shows a change curve of the actual rotational speed of the clutch with time in the oil filling process and the oil draining process; FIG. 3B (B) shows the actual clutch hydraulic pressure versus time during oil fill and drain; fig. 3B (c) shows the output flow rate of the clutch cooling solenoid valve over time during the oil fill and drain processes.

EngSpd in FIG. 3B (a) represents engine speed, shown in phantom, oddSpd represents odd clutch speed, shown in solid. KT1, KT2 and KT3 represent a first time threshold, a second time threshold and a preset time interval, respectively. Oddpd 1 and oddpd 2 represent the odd clutch rotational speed obtained at the time interval start of the preset time interval KT3 and the odd clutch rotational speed obtained at the time interval end of the preset time interval KT3, respectively. The preset time interval belongs to an oil drainage process, after the actual hydraulic pressure drops to a second pressure threshold KP2, a time node corresponding to the second pressure threshold KP2 is determined to be a clutch release reference point, wherein the time interval length between the clutch release reference point and the time interval starting point of the preset time interval is larger than the second time threshold KT2. In fig. 3B (B), KP1 and KP2 represent the first pressure threshold value and the second pressure threshold value, respectively. In fig. 3B (c), KL1 represents a set flow rate. Illustratively, kl1=4 liters. The ordinate RPM, bar, and Lpm of fig. 3B (a), 3B (B), and 3B (c) represent rotational speed units, hydraulic pressure units, and flow units, respectively.

Referring to fig. 3B (a) and 3B (B), it can be seen that as the oil filling operation continues, the clutch actual hydraulic pressure gradually rises, and when the clutch actual hydraulic pressure is greater than the first pressure threshold KP1 and the duration is greater than the first time threshold KT1, the engine speed and the clutch speed of the vehicle to be detected are acquired, the relative magnitude relation between the relative rotational speed deviation and the first preset rotational speed deviation threshold is determined, whether the relative rotational speed deviation determined by the engine speed and the clutch speed is smaller than the first preset rotational speed deviation threshold is determined, and in the case that the relative rotational speed deviation is smaller than the first preset rotational speed deviation threshold, the oil draining operation is performed after the oil filling operation is completed. With continued reference to fig. 3B (a) and 3B (B), it can be seen that as the draining operation is performed, the clutch actual hydraulic pressure gradually decreases, and during a time interval in which the clutch actual hydraulic pressure is smaller than the second pressure threshold KP2 and the duration is greater than the second time threshold KT2, the odd clutch gradually disengages, the clutch rotational speed decreases at a certain rate, and the relative rotational speed deviation determined by the engine rotational speed of the vehicle to be detected and the clutch rotational speed gradually increases.

In order to avoid erroneous judgment of clutch torque transmission abnormality caused by improper detection timing, the embodiment of the application performs clutch release abnormality detection in a preset KT3 time interval after a KT2 time interval. The preset time interval KT3 corresponds to the end of the draining process, and in theory the odd clutch has been fully disengaged, and the clutch speed will drop at a faster rate during the preset time interval KT 3.

Based on this, the clutch release abnormality detection is performed within the preset time interval KT 3. Specifically, the actual rotation speed change rate of the odd clutch in the preset time interval KT3 is determined, and the actual rotation speed change rate of the preset time interval KT3 is calculated by using (OddSpd 1-OddSpd 2)/KT 3 according to the actual rotation speed change rate of the preset time interval KT 3. And comparing the actual rotation speed change rate with a rotation speed change rate reference interval to determine whether the odd clutch is abnormal in separation.

Fig. 3B (c) shows a time-dependent change curve of the output flow of the clutch cooling solenoid valve during the oil filling process and the oil draining process, and referring to fig. 3B (c), it can be seen that the output flow of the clutch cooling solenoid valve needs to be controlled to be stabilized to a set flow during the oil filling process, and the output flow of the clutch cooling solenoid valve is adjusted to zero during the oil draining process when the hydraulic pressure value is reduced to the second pressure threshold KP2, so as to avoid the influence of drag torque on the detection of the rotational speed change rate of the clutch due to untimely adjustment of the output flow of the clutch cooling solenoid valve. In contrast, in the oil filling stage and in the oil draining stage when the hydraulic pressure value does not drop to the second pressure threshold KP2, it is necessary to ensure that the output flow of the clutch cooling solenoid valve is stable to the set flow, because the odd clutch is still in the engaged state in this stage, if the output flow of the clutch cooling solenoid valve is adjusted to zero, effective cooling cannot be performed on the odd clutch, and the odd clutch is burnt due to too high temperature. And under the condition that the time interval starting point of the preset time interval KT3 is reached, adjusting the output flow of the clutch cooling electromagnetic valve to be zero, and avoiding the influence of the clutch dragging torque on the detection of clutch torque transmission abnormality.

Example IV

Fig. 4 is a schematic structural diagram of a clutch torque transmission abnormality detection device according to a fourth embodiment of the present application, and the present embodiment is applicable to a case of abnormality detection of clutch torque transmission. The apparatus may be implemented in software and/or hardware and may be integrated in an electronic device such as a smart terminal.

As shown in fig. 4, the apparatus may include: the system comprises a filling and draining operation execution module 410, an actual hydraulic pressure monitoring module 420, a rotating speed data acquisition module 430 and a torque transmission detection result determination module 440.

The oil filling and draining operation execution module 410 is used for performing oil filling and draining operation on the clutch to be tested of the vehicle to be tested in the target working state; the target working state is determined based on a clutch torque transmission detection condition;

the actual hydraulic pressure monitoring module 420 is configured to monitor an actual hydraulic pressure applied to the clutch to be tested during a filling and draining process, and obtain a hydraulic pressure change record;

the rotation speed data obtaining module 430 is configured to obtain an engine rotation speed and a clutch rotation speed of the vehicle to be detected when the hydraulic pressure change record matches with a preset hydraulic pressure change;

the torque transmission detection result determining module 440 is configured to determine a torque transmission detection result of the clutch to be tested according to the engine speed and the clutch speed.

Optionally, the torque transmission detection result determining module 440 includes: a relative rotational speed deviation determination submodule for determining a relative rotational speed deviation between the engine rotational speed and the clutch rotational speed; the relative magnitude relation determining submodule is used for determining the relative magnitude relation between the relative rotation speed deviation and a preset rotation speed deviation threshold value; the actual rotation speed change rate determining submodule is used for determining the actual rotation speed change rate of the clutch to be tested in a preset time interval based on the clutch rotation speed under the condition that the relative rotation speed deviation is smaller than the preset rotation speed deviation threshold value; wherein the preset time interval corresponds to an oil drainage process; and the torque transmission detection result determination submodule is used for determining the torque transmission detection result of the clutch to be tested according to the actual rotating speed change rate.

Optionally, the torque transmission detection result determining sub-module includes: a rotation speed change rate reference interval determining unit, configured to determine a rotation speed change rate reference interval corresponding to the target operating state; and the torque transmission detection result determining unit is used for determining the torque transmission detection result of the clutch to be detected according to the actual rotation speed change rate and the rotation speed change rate reference interval.

Optionally, the apparatus further includes: the clutch torque transmission state updating module is used for updating the torque transmission state of the clutch corresponding to the clutch to be tested into a torque transmission abnormal state if the torque transmission detection result is abnormal after the torque transmission detection result of the clutch to be tested is determined according to the engine rotating speed and the clutch rotating speed; and the function limiting module is used for limiting the transmission gear corresponding to the clutch to be tested and limiting the engine torque.

Optionally, the apparatus further includes: the current working state acquisition module is used for responding to a clutch torque transmission detection instruction before the oil filling and draining operation is carried out on the clutch to be detected of the vehicle to be detected in the target working state, so as to acquire the current working state of the vehicle to be detected; the working state adjusting module is used for adjusting the current working state of the vehicle to be detected based on the clutch torque transmission detection condition and adjusting the current working state to be a target working state.

Optionally, the working state adjusting module includes: the motion state adjusting sub-module is used for adjusting the current motion state of the vehicle to be detected based on the clutch torque transmission detection condition; the transmission shifting fork position adjusting sub-module is used for adjusting the position of the transmission shifting fork of the vehicle to be detected based on the clutch torque transmission detection condition; the output flow adjusting module is used for adjusting the output flow of the clutch cooling electromagnetic valve based on the clutch torque transmission detection condition; wherein the current motion state comprises: at least one of vehicle travel speed, parking brake status, engine status, shift lever position, and transmission oil temperature.

Optionally, the clutch to be tested includes: odd clutches and even clutches.

The clutch torque transmission abnormality detection device provided by the embodiment of the invention can execute the clutch torque transmission abnormality detection method provided by any embodiment of the application, and has the corresponding performance module and beneficial effects of executing the clutch torque transmission abnormality detection method.

In the technical scheme of the disclosure, the related target road map and the collection, storage, use, processing, transmission, provision, disclosure and the like of the user point selection operation all conform to the regulations of related laws and regulations and do not violate the popular regulations.

Example five

Fig. 5 illustrates a schematic diagram of an electronic device 510 that can be used to implement an embodiment. The electronic device 510 includes at least one processor 511, and a memory, such as a Read Only Memory (ROM) 512, a Random Access Memory (RAM) 513, etc., communicatively coupled to the at least one processor 511, wherein the memory stores computer programs executable by the at least one processor, and the processor 511 may perform various suitable actions and processes in accordance with the computer programs stored in the Read Only Memory (ROM) 512 or the computer programs loaded from the storage unit 518 into the Random Access Memory (RAM) 513. In the RAM 513, various programs and data required for the operation of the electronic device 510 can also be stored. The processor 511, the ROM 512, and the RAM 513 are connected to each other by a bus 514. An input/output (I/O) interface 515 is also connected to bus 514.

Various components in the electronic device 510 are connected to the I/O interface 515, including: an input unit 516 such as a keyboard, a mouse, etc.; an output unit 517 such as various types of displays, speakers, and the like; a storage unit 518 such as a magnetic disk, optical disk, etc.; and a communication unit 519 such as a network card, modem, wireless communication transceiver, or the like. The communication unit 519 allows the electronic device 510 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunications networks.

The processor 511 may be a variety of general and/or special purpose processing components with processing and computing capabilities. Some examples of processor 511 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 511 performs the respective methods and processes described above, such as a clutch torque transfer abnormality detection method.

In some embodiments, the clutch torque transfer abnormality detection method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as the storage unit 518. In some embodiments, some or all of the computer program may be loaded and/or installed onto the electronic device 510 via the ROM 512 and/or the communication unit 519. When the computer program is loaded into RAM 513 and executed by processor 511, one or more steps of the clutch torque transfer abnormality detection method described above may be performed. Alternatively, in other embodiments, the processor 511 may be configured to perform the clutch torque transfer anomaly detection method in any other suitable manner (e.g., by means of firmware).

Various implementations of the systems and techniques described here above can be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), complex Programmable Logic Devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.

A computer program for carrying out the methods of the present application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of this application, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data processing server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.

The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.

It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present application may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solutions of the present application are achieved, and the present application is not limited herein.

The above embodiments do not limit the scope of the application. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application are intended to be included within the scope of the present application.

Claims

1. A method for detecting clutch torque transmission anomalies, the method comprising:

Determining a torque transmission detection result of the clutch to be detected according to the engine rotating speed and the clutch rotating speed;

the method for determining the torque transmission detection result of the clutch to be detected according to the engine rotating speed and the clutch rotating speed comprises the following steps: determining a relative rotational speed offset between the engine rotational speed and the clutch rotational speed; determining a relative magnitude relation between the relative rotational speed deviation and a preset rotational speed deviation threshold; determining the actual rotation speed change rate of the clutch to be tested in a preset time interval based on the clutch rotation speed under the condition that the relative rotation speed deviation is smaller than the preset rotation speed deviation threshold value; wherein the preset time interval corresponds to an oil drainage process; and determining a torque transmission detection result of the clutch to be detected according to the actual rotation speed change rate.

2. The method of claim 1, wherein determining a torque transfer detection result of the clutch under test based on the actual rotational speed change rate comprises:

determining a rotation speed change rate reference interval corresponding to the target working state;

and determining a torque transmission detection result of the clutch to be detected according to the actual rotation speed change rate and the rotation speed change rate reference interval.

3. The method according to any one of claims 1-2, characterized in that after determining a torque transmission detection result of the clutch under test from the engine speed and the clutch speed, the method comprises:

if the torque transmission detection result is abnormal, updating the torque transmission state of the clutch corresponding to the clutch to be detected into a torque transmission abnormal state;

and limiting the transmission gear corresponding to the clutch to be tested and limiting the engine torque.

4. The method according to any one of claims 1-2, wherein before the oil filling and draining operation is performed on the clutch to be tested of the vehicle to be tested in the target working state, the method further comprises:

responding to a clutch torque transmission detection instruction, and acquiring the current working state of the vehicle to be detected;

and adjusting the current working state of the vehicle to be detected based on the clutch torque transmission detection condition, and adjusting the current working state to be a target working state.

5. The method of claim 4, wherein adjusting the current operating state of the vehicle to be detected to a target operating state based on a clutch torque transfer detection condition comprises:

Based on the clutch torque transmission detection condition, adjusting the current motion state of the vehicle to be detected;

based on the clutch torque transmission detection condition, adjusting the position of a transmission shifting fork of the vehicle to be detected;

based on the clutch torque transmission detection condition, adjusting the output flow of a clutch cooling electromagnetic valve;

wherein the current motion state comprises: at least one of vehicle travel speed, parking brake status, engine status, shift lever position, and transmission oil temperature.

6. The method of claim 1, wherein the under-test clutch comprises: odd clutches and even clutches.

7. A clutch torque transmission abnormality detection device, characterized by comprising:

The torque transmission detection result determining module is used for determining a torque transmission detection result of the clutch to be detected according to the engine rotating speed and the clutch rotating speed;

the torque transmission detection result determining module comprises: a relative rotational speed deviation determination submodule for determining a relative rotational speed deviation between the engine rotational speed and the clutch rotational speed; the relative magnitude relation determining submodule is used for determining the relative magnitude relation between the relative rotation speed deviation and a preset rotation speed deviation threshold value; the actual rotation speed change rate determining submodule is used for determining the actual rotation speed change rate of the clutch to be tested in a preset time interval based on the clutch rotation speed under the condition that the relative rotation speed deviation is smaller than the preset rotation speed deviation threshold value; wherein the preset time interval corresponds to an oil drainage process; and the torque transmission detection result determination submodule is used for determining the torque transmission detection result of the clutch to be tested according to the actual rotating speed change rate.

8. A computer-readable storage medium having stored thereon a computer program, wherein the program when executed by a processor implements the clutch torque transfer abnormality detection method according to any one of claims 1 to 6.

9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable by the processor, wherein the processor implements the method of detecting a clutch torque transfer abnormality as claimed in any one of claims 1 to 6 when executing the computer program.