A clutch torque transmission point identification method, device, equipment and storage medium

By adjusting the clutch oil pressure and acquiring the speed difference in real time when a gear shift request is made, the torque transmission point is identified, which solves the problem of low sensitivity in the prior art and realizes high-sensitivity torque transmission point identification during gear operation, which is suitable for precise control of the transmission.

CN117989310BActive Publication Date: 2026-07-24SAIC MOTOR
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SAIC MOTOR
Filing Date
2022-10-28
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing clutch torque point identification methods have low sensitivity and can only be performed in neutral, which cannot meet the requirements for efficient control of the gearbox's starting, creeping, and shifting processes.

Method used

By adjusting the clutch oil pressure based on a preset pressure waveform when a gear shift request is made, the difference between the actual speed of the input or output shaft and the fitted predicted speed is obtained in real time, the torque transmission point is identified, and the difference between the maximum and minimum values ​​of the difference is used as the identification benchmark to improve the identification sensitivity.

Benefits of technology

It achieves high-sensitivity torque transmission point identification during gear operation, improving the accuracy and consistency of torque transmission point identification, and is suitable for precise control of gearbox starting, creeping and shifting processes.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a clutch torque transmission point identification method, device, equipment and storage medium, can be in response to gear switching request, obtain target clutch meeting gear switching demand, when the input shaft or output shaft of the gearbox of the target clutch is in the corresponding set range, start adjusting the oil pressure of the target clutch based on the preset pressure waveform diagram, and obtain the difference value between the actual speed of the input shaft or the output shaft at each moment and the fitting predicted speed in the adjustment process. If the difference between the maximum value and the minimum value of all difference values is not less than the preset speed difference value after the adjustment is completed, the first test pressure value of the last period in the preset pressure waveform diagram is taken as the torque transmission point of the target clutch. The clutch torque transmission point identification method can identify the torque transmission point in the gear running stage, and the identification reference of the speed change of the torque transmission point is the difference between the maximum difference value and the minimum difference value, and the identification sensitivity is higher.
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