CN115045928A

CN115045928A - Clutch torque transmission abnormity detection method, device, medium and electronic equipment

Info

Publication number: CN115045928A
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: 2022-09-13
Anticipated expiration: 2042-06-14
Also published as: CN115045928B

Abstract

The embodiment of the application discloses a method, a device, a medium and electronic equipment for detecting clutch torque transmission abnormity. The method comprises the following steps: in the target working state, carrying out oil charging and discharging operation on a clutch to be detected of a vehicle to be detected; wherein the target operating state is determined based on clutch torque transmission detection conditions; in the oil charging and discharging process, monitoring the actual hydraulic pressure applied to the clutch to be tested, and obtaining a hydraulic pressure change record; 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 determining a torque transmission detection result of the clutch to be detected according to the engine rotating speed and the clutch rotating speed. The technical scheme of the application can improve the accuracy of the abnormal torque transmission detection of the clutch and ensure the driving safety.

Description

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

Technical Field

The present disclosure relates to the field of computer application technologies, and in particular, to a method, an apparatus, a medium, and an electronic device for detecting an abnormality in a clutch torque transmission.

Background

The double-clutch transmission controls the pressure of the clutch through the electromagnetic valve of the clutch, realizes the torque transmission of the engine through the clutch and provides power for the whole vehicle. The abnormal transmission of the clutch can cause the unexpected transmission of the engine torque, the unexpected movement of the vehicle and even the unexpected direction of the vehicle, and the safety accident is caused. The abnormity detection of the clutch torque transmission is carried out to find out the abnormity of the clutch torque transmission in time, and the method has important significance for avoiding the occurrence of safety accidents and ensuring the driving safety.

In the related art, in a bench test link of a transmission assembly, a torque sensor is additionally arranged at the rear end of a transmission, and abnormality detection is performed on a clutch torque based on the torque sensor. However, in actual vehicle conditions, there is no additional torque sensor added to detect clutch torque.

Disclosure of Invention

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

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

in the target working state, carrying out oil charging and discharging operation on a clutch to be detected of a vehicle to be detected; wherein the target operating state is determined based on a clutch torque transmission detection condition;

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

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 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 transmission abnormality detection apparatus, the apparatus including:

the oil charging and discharging operation execution module is used for performing oil charging and discharging operation on a clutch to be detected of the vehicle to be detected in a target working state; wherein the target operating state is determined based on clutch torque transmission detection conditions;

the actual hydraulic monitoring module is used for monitoring the actual hydraulic pressure applied to the clutch to be tested in the oil charging and discharging process and obtaining a hydraulic pressure 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 device comprises a processor and a computer program stored on a memory and capable of being run by the processor, wherein the processor executes the computer program to realize the clutch torque transmission abnormity detection method according to the embodiment of the application.

According to the technical scheme of the embodiment of the application, 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; in the oil charging and discharging process, monitoring the actual hydraulic pressure applied to the clutch to be tested, and obtaining a hydraulic pressure change record; 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 determining a torque transmission detection result of the clutch to be detected according to the engine rotating speed and the clutch rotating speed. This application is based on the engine speed and the clutch speed that acquire, confirms the biography of the clutch that awaits measuring and turns round the testing result, has guaranteed the accuracy that the clutch biography turned round detected, and this application has realized passing to the clutch and has turned round the unusual detection to the clutch under the condition of not addding extra sensor in to the whole car, has reduced the clutch and has turned round unusual detection cost, has effectively guaranteed driving safety, has improved user experience.

It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present application, nor do they limit the scope of the present application. Other features of the present application will become apparent from the following description.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a flow chart of a method for detecting clutch transmission anomalies provided in accordance with an embodiment one;

FIG. 2 is a flow chart of a clutch transmission anomaly detection method provided in accordance with a second embodiment;

FIG. 3A is a flow chart of a clutch transmission anomaly detection method provided in accordance with a third embodiment;

FIG. 3B (a) shows the actual clutch speed versus time for the fill and drain events;

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

FIG. 3B (c) is a graph showing output flow of the clutch cooling solenoid valve over time during fill and drain;

fig. 4 is a schematic structural diagram of a clutch transmission abnormality detection apparatus 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 technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," "target," and "candidate" and the like in the description and claims of this application and the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or 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 one

Fig. 1 is a flowchart of a clutch transmission abnormality detection method according to an embodiment, which is applicable to a case where abnormality detection is performed on a clutch transmission, and the method can be performed by a clutch transmission abnormality detection device, which can be implemented in hardware and/or software and can be integrated into an electronic device operating the system.

As shown in fig. 1, the method includes:

and S110, carrying out oil charging and discharging operation on the clutch to be detected of the vehicle to be detected in the target working state.

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

The vehicle to be detected is a vehicle which needs to perform abnormal detection of the clutch torque. The clutch needing torque transmission detection in the vehicle to be detected is the clutch to be detected. Wherein, the clutch to be tested is a wet clutch. It can be known that the combination and separation of the clutch to be tested are realized by controlling the oil charging operation and the oil discharging operation of the clutch, and the oil charging operation enables the hydraulic pressure to rise to promote the clutch to be combined so as to transmit the torque of the engine and provide power for the whole vehicle. The oil drainage operation makes the hydraulic pressure drop, impels the clutch separation thereby to interrupt engine torque transmission, cuts off whole car power. Detecting the abnormal torque transmission of the clutch, specifically, detecting whether the clutch to be detected can be combined or not by executing oil charging operation to normally transmit the torque of the engine; and detecting whether the clutch to be detected can be separated or not by executing oil drainage operation, and normally and finally breaking torque transmission.

In an alternative embodiment, the clutch under test comprises: odd numbered clutches and even numbered clutches.

The dual clutch transmission comprises an odd clutch and an even clutch, wherein the odd clutch is a clutch responsible for odd gears, and the even clutch is a clutch responsible for even gears. Wherein, the odd clutch and the even clutch are wet clutches. The odd numbered clutches and the even numbered clutches are both oil cooled clutches. When a wet type dual clutch transmission is provided in a vehicle to be tested, clutch torque transmission detection is performed for each of an odd clutch and an even clutch in the dual clutch transmission. The odd-numbered clutch and the even-numbered clutch are only responsible for different vehicle gears, and the clutch torque transmission detection process of the odd-numbered clutch is consistent with the clutch torque transmission detection process of the even-numbered clutch. The technical scheme can be suitable for detecting the clutch torque transmission abnormity of the vehicle to be detected which is provided with the wet double-clutch transmission, and the applicability of the clutch torque transmission abnormity detection method is improved.

And S120, 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.

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

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

The hydraulic pressure change log is used to log the hydraulic pressure value change in a time dimension. The hydraulic pressure change records comprise hydraulic pressure change records corresponding to hydraulic pressure rising stages and hydraulic pressure change records corresponding to hydraulic pressure falling stages.

Wherein the preset hydraulic pressure change is predetermined according to an actual vehicle experiment. The preset hydraulic pressure change is used for limiting the hydraulic pressure value change in a 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 pressure change, determining the hydraulic pressure change trend of the clutch to be tested for combination in the hydraulic pressure rising stage, theoretically combining the clutch to be tested under the condition that the hydraulic pressure change record is matched with the preset hydraulic pressure change, gradually and normally transmitting the torque of the engine, and synchronizing the rotating speed of the engine and the rotating speed of the clutch at the moment.

And for the second preset hydraulic pressure change, determining the hydraulic pressure change trend of the clutch to be tested for separation in the hydraulic pressure reduction stage, separating the clutch to be tested theoretically under the condition that the hydraulic pressure change record is matched with the preset hydraulic pressure change, gradually cutting off the transmission of the engine torque, and at the moment, the engine rotating speed and the clutch rotating speed are not synchronized any more.

Next, step S130 will be explained from two hydraulic pressure change phases, i.e., a hydraulic pressure increasing phase and a hydraulic pressure decreasing phase.

First, step S130 will be described with respect to the hydraulic pressure increasing stage. The method comprises the steps of obtaining the engine rotating speed and the clutch rotating speed of a vehicle to be detected under the condition that a hydraulic pressure change record is matched with a preset hydraulic pressure change, and specifically obtaining the actual engine rotating speed and the actual 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 in a hydraulic pressure rising stage. It is determined whether the engine speed and the clutch speed are in speed synchronization 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 time of a hydraulic pressure value which is greater than or equal to a first pressure threshold value in the hydraulic pressure change record is greater than or equal to a first time threshold value. The first pressure threshold and the first time threshold are determined according to actual traffic demands, and are not limited herein. Preferably, the first pressure threshold is determined as the half-engagement point position of the clutch to be tested, for example, the first pressure threshold is assigned to 2.5 bar. Illustratively, the first time threshold is 1 second.

Next, step S130 will be described with respect to the hydraulic pressure decreasing stage. The method comprises the steps of 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, and specifically acquiring the actual engine rotating speed and the actual 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 in the hydraulic pressure descending stage. And determining whether the clutch to be tested starts to be separated or not and whether the engine rotating speed and the clutch rotating speed are not synchronized any more based on the actual engine rotating speed and the clutch rotating speed.

Optionally, the second preset hydraulic pressure change corresponding to the hydraulic pressure decreasing stage 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 determined according to actual traffic demands, and are not limited herein. Exemplarily, the second pressure threshold is determined to be 0.8 bar. The second time threshold is determined to be 0.4 seconds.

It is worth noting that the first and second pressure thresholds, and the first and second time thresholds, are merely used for distinguishing between hydraulic pressure change phases, and that there is no necessarily 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 different combination degrees of the clutch to be tested correspond to different torque transmission. The difference in torque transfer affects the relative magnitude of the engine speed and clutch speed, as well as the rate of change of clutch speed. And determining a torque transmission detection result of the clutch to be detected according to the engine rotating speed and the clutch rotating speed. Alternatively, the clutch engagement abnormality is detected based on a relative magnitude relationship between 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 in the clutch rotation speed.

According to the technical scheme of the embodiment of the application, oil filling and draining operations are carried out on the clutch to be tested of the vehicle to be tested in the target working state; in the oil charging and discharging process, monitoring the actual hydraulic pressure applied to the clutch to be tested, and obtaining a hydraulic pressure change record; 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 determining a torque transmission detection result of the clutch to be detected according to the engine rotating speed and the clutch rotating speed. This application is based on the engine speed and the clutch speed that acquire, confirms the biography of the clutch that awaits measuring and turns round the testing result, has guaranteed the accuracy that the clutch biography turned round detected, and this application has realized passing to the clutch and has turned round the unusual detection to the clutch under the condition of not addding extra sensor in to the whole car, has reduced the clutch and has turned round unusual detection cost, has effectively guaranteed driving safety, has improved user experience.

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

Wherein, the transmission torque testing result of the clutch to be tested includes: the transmission detection is abnormal and the transmission detection is normal. If the torque transmission detection result is that the torque transmission detection is abnormal, the clutch torque transmission state corresponding to the clutch to be detected needs to be updated to be the torque transmission abnormal state. In the case where the number of clutches to be tested is greater than one, for example, in the case where an odd-numbered clutch and an even-numbered clutch are included, the clutch torque transmission state of the clutch to be tested having an abnormal torque transmission detection is updated to the abnormal torque transmission state. And if the torque transmission detection result of the even-numbered clutch is that the torque transmission detection is abnormal, updating the clutch torque transmission state corresponding to the even-numbered clutch to be the torque transmission abnormal state.

Optionally, if the torque transmission detection result corresponding to the clutch to be detected is that the torque transmission detection is normal, updating the clutch torque transmission state corresponding to the clutch to be detected to be the torque transmission normal state; if the clutch to be tested is not subjected to torque transmission abnormity detection, the clutch torque transmission state corresponding to the clutch to be tested is not modified, and the clutch torque transmission state is kept consistent with a torque transmission detection result obtained by performing the clutch torque transmission abnormity detection last time.

The clutch torque transmission state is updated to a clutch torque transmission state corresponding to the clutch to be tested, and specifically, a Diagnostic Trouble Code (DTC) is stored in a remote Control Unit (TCU). And reading a clutch torque transmission abnormity DTC stored in the TCU at the power-on time of the TCU, and setting a clutch torque transmission state identification bit according to the clutch torque transmission abnormity DTC.

The method includes the steps of limiting transmission gears corresponding to clutches to be tested, limiting 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 odd number clutches and even number clutches are included, determining the clutches to be tested with abnormal transmission detection results, limiting the transmission gears corresponding to the clutches to be tested, limiting the use of odd number shaft gears of the transmission by taking the transmission detection results of the odd number clutches as the transmission detection abnormalities, controlling all shifting forks of the odd number gears of the transmission to be in neutral gears, and exemplarily, taking the 1 gear, the 3 gear, the 5 gear and the 7 gear of the transmission to be neutral gears. The vehicle limp running is carried out by using even gears of the transmission, the TCU limits the highest gear of the even shaft to be within a set gear range, and limits the torque of the engine to be within a set torque range through a CAN (Controller Area Network) bus, so that the vehicle safety is further ensured. The set gear range and the set torque range are determined according to actual business requirements, and are not limited herein. Illustratively, the set torque range is 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 transmission fault lamp corresponding to the clutch to be detected is controlled to be turned on so as to warn a driver that the vehicle has a fault and prompt the driver to timely overhaul the vehicle.

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

Example two

Fig. 2 is a flowchart of a clutch transmission abnormality detection method provided according to the second embodiment. The present embodiment is further optimized on the basis of the above embodiments, and specifically, the operation "determining the torque transmission detection result of the clutch to be tested according to the engine rotation speed and the clutch rotation speed" is refined.

As shown in fig. 2, the method includes:

and S210, in the target working state, carrying out oil charging and discharging operation on the clutch to be detected of the vehicle to be detected.

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 change record is matched with the preset hydraulic change.

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

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

And S250, determining the relative size relation between the relative rotating speed deviation and a preset rotating speed deviation threshold value.

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

The relative rotation speed deviation may include a relative rotation speed deviation belonging to the hydraulic pressure rising stage and a relative rotation speed deviation belonging to the hydraulic pressure falling stage, corresponding to the hydraulic pressure rising stage and the hydraulic pressure falling stage of the oil charging and discharging operation. Accordingly, the preset rotational speed deviation threshold includes a first preset rotational speed deviation threshold corresponding to the hydraulic pressure rising phase and a second preset rotational speed deviation threshold corresponding to the hydraulic pressure falling phase.

Determining a first relative magnitude relation between the relative rotation speed deviation and a first preset rotation speed deviation threshold value for a hydraulic pressure rising stage; and determining a first relative magnitude relation between the relative rotation speed deviation and a second preset rotation speed deviation threshold value for the hydraulic pressure reduction stage.

If the relative rotation speed deviation is smaller than the preset rotation speed deviation threshold value, the fact that the clutch to be tested can be normally combined can be determined, and the torque can be normally transmitted. Specifically, the first relative rotation speed deviation is smaller than a first preset rotation speed deviation threshold, or the second relative rotation speed deviation is smaller than a second preset rotation speed deviation threshold, so that the clutch to be tested can be determined to be normally combined, and the 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 and the hydraulic pressure falling stage. For example, whether the clutch to be tested can be normally combined can be determined only according to the first relative magnitude relation belonging to the hydraulic pressure rising phase; and whether the clutch to be tested can be normally combined or not can be determined only according to the second relative magnitude relation belonging to the hydraulic pressure descending stage.

If the deviation of the relative rotating speed is larger than the preset threshold value of the deviation of the rotating speed, the fact that the clutch to be tested has abnormal combination risk and cannot normally transmit torque to provide power for the vehicle can be determined. 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 combine the clutch to be tested, and the misjudgment of the abnormal transmission torque of the clutch 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 sequentially executed, the relative size 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 combination of the clutch to be detected is abnormal, and the clutch to be detected cannot normally transmit torque to provide power for the vehicle.

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

The clutch torque transmission abnormality can roughly correspond to two cases, a clutch engagement abnormality and a clutch disengagement abnormality. According to the relative size relation between the relative rotation speed deviation and the preset rotation speed deviation threshold value, the clutch combination abnormity can be detected. And detecting the clutch separation abnormality under the condition that the relative rotation speed deviation is smaller than a preset rotation speed deviation threshold value. The relative speed deviation is less than a preset speed deviation threshold value, corresponding to the condition that the clutch is normally combined and can normally transmit torque to provide power for the vehicle.

Specifically, the actual rotating speed change rate of the clutch to be tested in a preset time interval is determined, and whether the clutch is abnormally separated is determined according to the actual rotating speed change rate. Wherein the preset time interval corresponds to an oil drainage process. The oil drainage process corresponds to a hydraulic pressure reduction stage, the clutch to be tested is separated due to hydraulic pressure reduction, the rotating speed of the clutch is reduced, and torque transmission is gradually cut off. The clutch disengagement abnormality may be detected based on the actual rate of change of the rotational speed determined during the hydraulic pressure drop phase, and whether there is an unexpected transmission of engine torque.

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

The method includes the steps of determining the actual rotating speed change rate of a clutch to be tested in a preset time interval, specifically, obtaining the rotating speed of the clutch corresponding to the starting point of the time interval as the rotating speed of a first clutch, and the rotating speed of the clutch corresponding to the ending point of the time interval as the rotating speed of a second clutch, and calculating the actual rotating speed change rate of the clutch to be tested in the preset time interval according to the rotating speed of the first clutch, the rotating speed of the second clutch and the preset time interval. Specifically, a difference value is made between the first clutch rotating speed and the second clutch rotating speed, and the ratio of the difference value to the time interval length of the preset time interval is determined as the actual rotating speed change rate.

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

And the actual rotating speed change rate is used for reflecting the separation condition of the clutch to be tested and determining whether the clutch to be tested is normally separated. And determining a torque transmission detection result of the clutch to be detected according to the actual rotating speed change rate.

In an optional embodiment, determining a torque transmission detection result of the clutch to be tested according to the actual speed change rate includes: determining a rotating 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 rotating speed change rate and the rotating speed change rate reference interval.

The reference interval of the rotating speed change rate gives the rotating speed change rate range of the sensor to be measured in the separation process. The reference interval of the rotation speed change rate corresponds to the target operating state, and optionally, the reference interval of the rotation speed change rate corresponds to the transmission oil temperature state in the case that the target operating state includes the transmission oil temperature state. Optionally, the reference interval of the rotation speed change rate is also related to the type of the clutch to be tested, that is, in the case that the transmission oil temperature in the target working state is the same, the reference intervals of the rotation speed change rates corresponding to the odd numbered clutches and the even numbered clutches are different.

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

For example, table 1 shows a correspondence relationship between a reference interval of a rotation speed change rate and a state of a transmission oil temperature.

TABLE 1

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

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

According to the technical scheme, the relative speed deviation between the engine speed and the clutch speed is determined, the relative size relation between the relative speed deviation and a preset speed deviation threshold value is determined, and the actual speed change rate of the clutch to be tested in a 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 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 rotating speed change rate. Whether the clutch to be detected is abnormal in separation or not is detected, the condition of abnormal torque transmission can be found in time, the vehicle to be detected is prevented from running towards an unexpected direction, and the safety accident risk is reduced.

EXAMPLE III

Fig. 3A is a flowchart of a clutch transmission abnormality detection method provided according to a third embodiment. The embodiment is further optimized on the basis of the embodiment, and 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 is performed, and the current working state of the vehicle to be detected is obtained in response to the clutch torque transmission detection instruction; based on clutch transmission detection conditions, adjusting the current working state of the vehicle to be detected, and adjusting the current working state to be a target working state "

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

and S310, responding to the clutch torque transmission detection instruction, and acquiring the current working state of the vehicle to be detected.

And the clutch torque transmission detection instruction is used for indicating the clutch to be detected to carry out clutch torque transmission abnormity detection. Optionally, the detection of the clutch transmission torque abnormality may be periodic, for example, the detection period of the clutch transmission torque abnormality detection may be determined based on the driving distance of the vehicle to be detected, and the set driving distance of the vehicle to be detected is determined as one detection period, for example, the clutch transmission torque abnormality detection is performed on the vehicle to be detected once every 2 kilometers of the vehicle to be detected. Of course, the clutch torque anomaly detection may not be periodic, and the clutch torque transmission detection command may be generated in any situation where there is a need for clutch torque transmission anomaly monitoring.

The current working state refers to the working state of the vehicle to be detected at the current moment, and optionally 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.

And 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 the unexpected movement of a vehicle caused by the torque transmission detection can be avoided, the safety of the clutch torque transmission detection process is ensured, and the accuracy of the 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 the target working state.

In an optional embodiment, adjusting the current operating state of the vehicle to be detected based on the clutch transmission detection condition, and adjusting the current operating state to a target operating state includes: 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 based on the clutch torque transmission detection condition; wherein the current motion state comprises: at least one of a vehicle travel speed, a parking brake state, an engine state, a shift lever position, and a transmission oil temperature.

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

Based on clutch 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 a neutral gear, 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 the neutral gear. The shifting fork of the transmission is adjusted to be in a neutral position, so that the accidental vehicle rising caused in the oil filling process can be prevented.

The output flow of the clutch cooling solenoid 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 solenoid valve is controlled to be a set flow, and the set flow is determined according to the actual service requirement, which is not limited herein. Illustratively, the set flow rate is 4 liters. In the process of executing 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 solenoid valve is adjusted to be zero, and the duration time for controlling the output flow of the clutch cooling solenoid valve to be zero is longer than the cooling flow control time threshold value, so that the influence of the dragging torque of the clutch on the abnormal detection of the clutch torque transmission can be avoided, and the accuracy of the abnormal detection of the clutch torque transmission is ensured.

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 condition, so that the safety of the clutch torque detection process is guaranteed, and the accuracy of the clutch torque detection is also guaranteed.

And S330, performing oil charging and discharging operation on the clutch to be detected of the vehicle to be detected in the target working state.

And S340, 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.

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

And 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 clutch torque transmission abnormity detection is carried out, the current working state of the vehicle to be detected is adjusted based on the clutch torque transmission detection condition, the current working state is adjusted to be the target working state, the safety of the clutch torque transmission detection process is guaranteed, and the accuracy of clutch torque abnormity detection is also guaranteed.

In a specific embodiment, under the condition that 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, clutch torque transmission abnormality detection processes of the odd clutch and the even clutch are consistent, the clutch torque transmission abnormality detection process is described by taking the odd clutch as an example, and details of the clutch torque transmission abnormality detection process for the even clutch are omitted.

Firstly, judging whether the current working state of the vehicle to be detected is a target working state, and carrying out oil charging operation and oil discharging operation on an odd-numbered clutch of the vehicle to be detected under the condition that the current working state of the vehicle to be detected is the target working state. 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 rotation 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 fill and drain events; FIG. 3B (c) shows the output flow of the clutch cooling solenoid valve versus time during fill and drain events.

EngSpd in FIG. 3B (a) represents engine speed, shown in phantom, and 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. The odd clutch speeds obtained at the start of the time interval of the preset time interval KT3 and the odd clutch speeds obtained at the end of the time interval of the preset time interval KT3 are denoted by odd spd1 and odd spd2, respectively. The preset time interval belongs to an oil drainage process, a time interval starting point of the preset time interval KT3 is determined as a clutch separation reference point after actual hydraulic pressure is reduced to a second pressure threshold KP2, and the time node corresponding to the second pressure threshold KP2 is determined as a time interval starting point, wherein the length of the time interval between the clutch separation reference point and the time interval starting point of the preset time interval is greater than the second time threshold KT 2. In fig. 3b (b), KP1 and KP2 represent the first pressure threshold and the second pressure threshold, respectively. In fig. 3b (c), KL1 indicates the set flow rate. Exemplarily, KL1 is 4 liters. The ordinates RPM, Bar and Lpm of fig. 3b (a), 3b (b) and 3b (c) represent units of rotation speed, hydraulic pressure and flow rate, respectively.

Referring to fig. 3b (a) and 3b (b), it can be seen that as the oil charging operation continues, the actual hydraulic pressure of the clutch gradually rises, when the actual hydraulic pressure of the clutch is greater than a first pressure threshold KP1 and the duration is greater than a first time threshold KT1, the engine speed and the clutch speed of the vehicle to be detected are obtained, the relative magnitude relation between the relative speed deviation and a first preset speed deviation threshold is determined, whether the relative speed deviation determined by the engine speed and the clutch speed is smaller than the first preset speed deviation threshold is determined, and the oil discharging operation is executed after the oil charging operation is completed under the condition that the relative speed deviation is smaller than the first preset speed deviation threshold. With continued reference to fig. 3b (a) and 3b (b), it can be seen that as the oil draining operation is performed, the actual hydraulic pressure of the clutch gradually decreases, and in a time interval in which the actual hydraulic pressure of the clutch is smaller than the second pressure threshold KP2 and the duration is greater than the second time threshold KT2, the odd-numbered clutches are gradually disengaged, the clutch speed decreases at a certain rate, and the relative speed deviation determined by the engine speed and the clutch speed of the vehicle to be detected gradually increases.

In order to avoid misjudgment of clutch torque transmission due to improper detection time, the embodiment of the application carries out clutch separation abnormity detection in a preset KT3 time interval after the KT2 time interval. The preset time interval KT3 corresponds to the end of the draining process, in which theoretically the odd numbered clutches have achieved full disengagement, the clutch speed will decrease at a faster rate within the preset time interval KT 3.

Based on this, the clutch release abnormality detection is performed within the presettable time period KT 3. Specifically, the actual rotating speed change rate of the odd-numbered clutch in the preset time interval KT3 is determined, and the actual rotating speed change rate of the preset time interval KT3 is calculated by using (OddSpd1-OddSpd2)/KT3 according to the actual rotating speed change rate of the preset time interval KT 3. And comparing the actual rotating speed change rate with the rotating speed change rate reference interval to determine whether the odd-numbered clutch is abnormally separated.

Fig. 3b (c) shows a change curve of the output flow of the clutch cooling solenoid valve with time in the oil charging process and the oil draining process, and as can be seen from fig. 3b (c), in the oil charging process, the output flow of the clutch cooling solenoid valve needs to be controlled to be stable to be a set flow, and in the oil draining process, under the condition that the hydraulic value is reduced to the second pressure threshold KP2, the output flow of the clutch cooling solenoid valve is adjusted to be zero, so as to avoid the influence of the dragging torque on the detection of the rotating speed change rate of the clutch due to the untimely adjustment of the output flow of the clutch cooling solenoid valve. In contrast, in the oil charging stage and the oil draining stage when the hydraulic value is not reduced to the second pressure threshold KP2, it is necessary to ensure that the output flow of the clutch cooling solenoid valve is stabilized to a set flow, because the odd-numbered 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-numbered clutch, and the odd-numbered clutch is burnt due to an excessively high temperature. And under the condition that the time interval starting point of the preset time interval KT3 is reached, the output flow of the clutch cooling electromagnetic valve is adjusted to be zero, and the influence of the dragging torque of the clutch on the abnormal detection of the clutch torque transmission is avoided.

Example four

Fig. 4 is a schematic structural diagram of a clutch torque abnormality detection apparatus according to a fourth embodiment of the present invention, which is applicable to a case where abnormality detection is performed on a clutch torque. The device can be realized by software and/or hardware, and can be integrated in electronic equipment such as an intelligent terminal.

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

The oil charging and discharging operation executing module 410 is used for performing oil charging and discharging operation on a clutch to be detected of a vehicle to be detected in a target working state; wherein the target operating state is determined based on clutch torque transmission detection conditions;

the actual hydraulic monitoring module 420 is used for monitoring the actual hydraulic pressure applied to the clutch to be tested in the oil charging and discharging process and obtaining a hydraulic pressure change record;

the rotating speed data acquisition module 430 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;

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

Optionally, the 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 size relation determining submodule is used for determining the relative size relation between the relative rotating speed deviation and a preset rotating speed deviation threshold value; the actual rotating speed change rate determining submodule is used for determining the actual rotating speed change rate of the clutch to be tested in a preset time interval based on the rotating speed of the clutch under the condition that the relative rotating speed deviation is smaller than the preset rotating speed deviation threshold value; wherein the preset time interval corresponds to an oil drainage process; and the torque transmission detection result determining submodule is used for determining the torque transmission detection result of the clutch to be detected 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 rotating speed change rate and the rotating speed change rate reference interval.

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

Optionally, the apparatus further comprises: the current working state acquisition module is used for responding to a clutch torque transmission detection instruction before a clutch to be detected of the vehicle to be detected is subjected to oil charging and discharging operation in the target working state, and acquiring the current working state of the vehicle to be detected; and 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 submodule 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 submodule is used for adjusting the position of a 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 a vehicle travel speed, a parking brake state, an engine state, a shift lever position, and a transmission oil temperature.

Optionally, the clutch under test includes: an odd clutch and an even clutch.

The clutch transmission torque abnormality detection device provided by the embodiment of the invention can execute the clutch transmission torque abnormality detection method provided by any embodiment of the application, and has the corresponding performance module and beneficial effects of executing the clutch transmission torque 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 point selection operation of the user are all in accordance with the regulations of related laws and regulations, and do not violate the good customs of the public order.

EXAMPLE five

FIG. 5 illustrates a schematic diagram of an electronic device 510, which can be used to implement embodiments. The electronic device 510 includes at least one processor 511, and a memory communicatively connected to the at least one processor 511, such as a Read Only Memory (ROM)512, a Random Access Memory (RAM)513, and so on, wherein the memory stores computer programs executable by the at least one processor, and the processor 511 may perform various suitable actions and processes according to 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 necessary 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, and the like; 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, or the like; 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.

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, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, or the like. The processor 511 performs the various methods and processes described above, such as the clutch transmission abnormality detection method.

In some embodiments, the clutch torque anomaly detection method may be implemented as a computer program tangibly embodied in 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 transmission anomaly detection method described above may be performed. Alternatively, in other embodiments, the processor 511 may be configured by any other suitable means (e.g., by way of firmware) to perform the clutch torque anomaly detection method.

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, Field Programmable Gate Arrays (FPGAs), Application Specific Integrated Circuits (ASICs), Application Specific Standard Products (ASSPs), system on a 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 that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.

A computer program for implementing 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 performed. A computer program can execute entirely on a machine, partly on a machine, as a stand-alone software package partly on a machine and partly on a remote machine or entirely on a 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. A 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) by 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 can 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, speech, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a back-end 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 back-end, 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. A client and server are generally 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 host and VPS service are overcome.

It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present application may be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solution of the present application can be achieved, and the present invention is not limited thereto.

The above-described embodiments should not be construed as limiting the scope of the present application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method of detecting clutch torque transmission abnormality, the method comprising:

in the target working state, carrying out oil charging and discharging operation on a clutch to be detected of a vehicle to be detected; wherein the target operating state is determined based on clutch torque transmission detection conditions;

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;

2. The method of claim 1, wherein determining a torque sensing result for the clutch under test based on the engine speed and the clutch speed comprises:

determining a relative speed deviation between the engine speed and the clutch speed;

determining a relative magnitude relation between the relative rotation speed deviation and a preset rotation speed deviation threshold value;

under the condition that the relative rotation speed deviation is smaller than the preset rotation speed deviation threshold value, 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; 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 rotating speed change rate.

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

determining a rotating 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 rotating speed change rate and the rotating speed change rate reference interval.

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

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

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

5. The method according to any one of claims 1-3, 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 the following steps:

responding to a clutch 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.

6. The method of claim 5, wherein adjusting the current operating state of the vehicle to be tested to a target operating state based on clutch torque sensing conditions comprises:

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 based on the clutch torque transmission detection condition;

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

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

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

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

9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a clutch transmission abnormality detection method according to any one of claims 1 to 7.

10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the clutch torque anomaly detection method according to any one of claims 1 to 7 when executing the computer program.