CN-121977029-A - Control method of vehicle clutch and related equipment

CN121977029ACN 121977029 ACN121977029 ACN 121977029ACN-121977029-A

Abstract

The embodiment of the application provides a control method and related equipment for a vehicle clutch, and relates to the technical field of mechanical transmission control. The method comprises the steps of controlling the clutch to execute combination operation with gradually increasing combination duration time under the condition of restraining an output shaft of the clutch until a contact point of the clutch is identified according to operation parameter change of a power source in the vehicle, determining whether the clutch needs to be subjected to contact point identification again or not based on historical operation data of the clutch in the operation process after combination is completed, judging whether replacement conditions are met or not based on historical accumulated data of the clutch under the condition that the clutch needs to be subjected to contact point identification again, and sending a replacement prompt when the replacement conditions are met. The application can ensure the optimal comprehensive performance of the clutch in the whole service life of the clutch.

Inventors

SHI QIANLIE
FU LING
Tang Zhangmin
WANG SHULONG
LIU YANBIN
LIU YUXIN
WANG QITAO

Assignees

中联重科股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260106

Claims (13)

1. A method of controlling a vehicle clutch, the method comprising: controlling the clutch to perform a coupling operation for progressively increasing coupling durations with the output shaft of the clutch constrained until a contact point of the clutch is identified based on an operating parameter change of a power source in the vehicle; determining whether the clutch needs to perform contact point recognition again based on historical operation data of the clutch in the operation process after the clutch is combined; And under the condition that the clutch needs to carry out contact point recognition again, judging whether a replacement condition is met or not based on the historical accumulated data of the clutch, and sending a replacement prompt when the replacement condition is met.
2. The method of claim 1, wherein the operating parameters include speed and torque fluctuations, and wherein controlling the clutch to perform a coupling operation for progressively increasing coupling durations until a contact point of the clutch is identified based on a change in the operating parameters of a power source in the vehicle comprises: Controlling the clutch to perform a combination operation according to preset control pressure and initial combination time; after the combination operation is finished, if the rotation speed fluctuation and the torque fluctuation of the power source do not reach the recognition threshold, increasing the initial combination time according to a preset step length, and taking the increased initial combination time as new initial combination time, and repeatedly executing the combination operation and the judgment step until the rotation speed fluctuation and the torque fluctuation of the power source reach the recognition threshold; in the event that both the rotational speed fluctuation and the torque fluctuation reach an identification threshold, a contact point of the clutch is determined based on a current engagement duration.
3. The method of claim 1, wherein said controlling said clutch to perform a binding operation with progressively increasing binding durations with said constraining the output shaft of the clutch, said determining whether said clutch requires re-contact point identification based on historical operating data of said clutch during completed binding operation, said method further comprising: After the contact point is identified, entering a slipping stage, and correcting the real-time control pressure of the slipping stage based on the running state of the vehicle until reaching the preset slipping end pressure so as to complete the coupling process of the clutch.
4. A method according to claim 3, wherein said modifying the real-time control pressure of the slip phase based on the operating state of the vehicle until a preset slip endpoint pressure is reached to complete the clutch engagement process comprises: In a timing period of the sliding stage, correcting the real-time control pressure based on the running state of the vehicle under the condition that the real-time control pressure does not reach the sliding end pressure and the accumulated duration time reaches the preset calibration time; Resetting the accumulated duration and restarting timing, and determining whether the modified real-time control pressure is greater than the skid finishing pressure; and if the real-time control pressure does not reach the slip endpoint pressure and the accumulated duration time reaches the preset calibration time in the timing period of the slip stage, correcting the real-time control pressure based on the running state of the vehicle until the corrected real-time control pressure reaches the slip endpoint pressure in the timing period so as to complete the coupling process of the clutch.
5. The method of claim 4, wherein the operating conditions include a vehicle speed change value, a power source rotational speed change value, and a torque change value of the vehicle; Correcting the real-time control pressure based on the operating state of the vehicle, including: Reducing the real-time control pressure when the vehicle speed change value is greater than or equal to a preset vehicle speed change upper limit value, or the rotation speed change value is greater than a preset power source rotation speed change upper limit value, or the torque change value is greater than or equal to a preset torque change upper limit value; When the speed change value is smaller than or equal to a preset speed change lower limit value, the rotating speed change value is not larger than a preset power source rotating speed change upper limit value, and the torque change value is smaller than or equal to a preset torque change lower limit value, the real-time control pressure is increased; and under the condition that the speed change value is between a preset speed change upper limit value and a speed change lower limit value, the rotating speed change value is not larger than a preset power source rotating speed change upper limit value, and the torque change value is between a preset torque change lower limit value and an upper limit value, the real-time control pressure is kept unchanged.
6. The method of claim 1, wherein the historical operating data includes a first usage count and a first range of the clutch; the determining whether the clutch needs to perform contact point recognition again based on the historical operation data and the performance parameters of the clutch in the operation process after the clutch is combined comprises the following steps: Acquiring a difference between actual and theoretical changes of the vehicle speed of the clutch in a fast-coupling stage under the condition that any one of the first usage count and the first driving range is larger than or equal to a first preset threshold; And under the condition that the difference value is larger than or equal to a first preset difference value, determining that the clutch needs to carry out contact point recognition again.
7. The method of claim 6, wherein after obtaining a difference between an actual change and a theoretical change in vehicle speed of the clutch during the fast engagement phase, the method further comprises: and under the condition that the difference is smaller than a first preset difference, if any one of the first usage count and the first driving mileage is larger than or equal to a second preset threshold, determining that the clutch needs to carry out contact point recognition again, wherein the second preset threshold is larger than the first preset threshold.
8. The method of claim 1, wherein the method further comprises: after the contact point recognition is performed again, the slip endpoint pressure is increased based on the degree of decay of the preset slip coefficient.
9. The method of claim 1, wherein the historical aggregate data includes a second usage count of the clutch, a second range, and a number of identifications of contact points; and when the clutch needs to carry out contact point recognition again, judging whether the replacement condition is reached or not based on the historical accumulated data of the clutch, wherein the method comprises the following steps: Acquiring a difference value between actual change and theoretical change of the vehicle speed of the clutch in a quick combination stage under the condition that any one of the second driving mileage, the second usage count and the identification frequency is larger than a third preset threshold; and if the difference is greater than or equal to a second preset difference, determining that the replacement condition is met.
10. The method of claim 9, wherein after obtaining a difference between an actual change and a theoretical change in vehicle speed of the clutch during the fast engagement phase, the method further comprises: And under the condition that the difference value is smaller than a second preset difference value, determining that a replacement condition is met under the condition that any one of the second driving mileage, the second usage count and the identification number is larger than a fourth preset threshold, wherein the fourth preset threshold is larger than the third preset threshold.
11. A control device for a vehicle clutch, the device comprising: A control module for controlling the clutch to perform a coupling operation for a progressively increasing coupling duration with the output shaft of the clutch constrained until a contact point of the clutch is identified based on an operating parameter change of a power source in the vehicle; The determining module is used for determining whether the clutch needs to carry out contact point recognition again or not based on historical operation data of the clutch in the operation process after the clutch is combined; And the judging module is used for judging whether the replacement condition is met or not based on the historical operation data and the recognition times of the contact points under the condition that the clutch needs to carry out contact point recognition again, and sending a replacement prompt when the replacement condition is met.
12. An electronic device comprising a processor and a memory storing computer program instructions; the processor, when executing the computer program instructions, implements a method for controlling a vehicle clutch according to any one of claims 1-11.
13. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon computer program instructions, which when executed by a processor, implement a method of controlling a vehicle clutch according to any of claims 1-11.

Description

Control method of vehicle clutch and related equipment Technical Field The invention relates to the technical field of mechanical transmission control, in particular to a control method and related equipment for a vehicle clutch. Background The clutch is used as a core control component between a power source and a transmission system of mechanical equipment (such as a tractor), the working state of the clutch directly determines the smoothness of power switching and the driving experience of the whole machine, and the clutch has key influence on the working efficiency and the service life of the equipment. However, the conventional control method of the vehicle clutch still has a remarkable short plate, and on one hand, the conventional clutch self-learning method has limited accuracy. For example, a method for identifying contact points by means of abrupt change of the rotation speed of a clutch output shaft cannot eliminate interference of system dragging torque, so that deviation exists in learning results, and a method based on the rotation speed difference of the input/output shaft improves identification capability to a certain extent, but the self-learning process can aggravate the sliding abrasion of the clutch and shorten the service life of the clutch. Meanwhile, in order to realize the former, a rotating speed sensor is additionally arranged in a traditional tractor transmission system, so that the system cost and complexity are increased. These inaccurate self-learning results provide a baseline parameter for subsequent control that is subject to error, which can affect the smoothness of the clutch engagement process from the source. On the other hand, in the aspect of state management, the basis for judging whether the clutch needs to be self-learned again is too single, usually only depends on the combination times, and the actual wear state of the clutch cannot be accurately reflected, so that the self-learning can be triggered too early or too late. More importantly, the prior art lacks a quantitative evaluation and early warning mechanism for the health state of the clutch, and the clutch is only passively replaced by a user after the clutch is completely disabled, so that the clutch is very easy to cause unplanned shutdown in critical agriculture time, and the operation efficiency is seriously affected. Therefore, aiming at the problems of poor control standard deviation, poor self-adaption of a control method, single state evaluation basis, lack of life early warning and the like caused by the self-learning inaccuracy, a set of systematic clutch full life cycle intelligent control scheme is needed, so that the optimal comprehensive performance of the clutch is ensured in the whole life period of the clutch. Disclosure of Invention The embodiment of the application aims to provide a control method and related equipment for a vehicle clutch, which are used for providing a set of systematic intelligent control scheme for the whole life cycle of the clutch, so that the optimal comprehensive performance of the clutch is ensured in the whole life cycle of the clutch. In a first aspect, an embodiment of the present application provides a method for controlling a clutch of a vehicle, the method including: controlling the clutch to perform a coupling operation for progressively increasing coupling durations with the output shaft of the clutch constrained until a contact point of the clutch is identified based on an operating parameter change of a power source in the vehicle; after the contact point is identified, entering a slipping stage, and correcting the real-time control pressure of the slipping stage based on the running state of the vehicle until reaching the preset slipping end pressure so as to complete the coupling process of the clutch; determining whether the clutch needs to perform contact point recognition again based on historical operation data of the clutch in the operation process after the clutch is combined; And under the condition that the clutch needs to carry out contact point recognition again, judging whether a replacement condition is met or not based on the historical accumulated data of the clutch, and sending a replacement prompt when the replacement condition is met. Optionally, the operating parameters include rotational speed fluctuations and torque fluctuations; controlling the clutch to perform a coupling operation for a progressively increasing coupling duration until a contact point of the clutch is identified based on a change in an operating parameter of a power source in the vehicle, comprising: controlling the clutch to perform a coupling operation at a preset initial control pressure and an initial coupling time, the initial coupling time being configured to be less than an estimated time required for the clutch to reach a contact point; After the combination operation is finished, if the rotation speed fluctuation and the torque fluctuation of the power s