Vehicle, gearbox and control method and device for torque of clutch

Abstract

The invention discloses a control method for torque of a clutch. The method comprises the steps of: when a vehicle runs, obtaining the sliding friction rotating speed difference of the clutch; when the sliding friction rotating speed difference is smaller than or equal to the threshold rotating speed, obtaining input torque of the clutch and output torque of the clutch; if the difference value between the input torque of the clutch and the output torque of the clutch exceeds a preset deviation range, obtaining the whole vehicle load torque, and determining a first clutch gain value according to the whole vehicle load torque; and determining estimated torque of the clutch according to the first clutch gain value. According to the scheme, the self-adaptive control method for the torque of the clutch is provided, the clutch gain value with higher accuracy can be obtained, and then more accurate estimated torque of the clutch is calculated, so that the control abnormity of the vehicle under the transient torque control working conditions such as starting and gear shifting is avoided, and the driving safety and driving comfort of the vehicle are improved.

Description

technical field [0001] The present application relates to the technical field of vehicle clutch control, in particular to a method and device for controlling vehicle, gearbox and clutch torque. Background technique [0002] With the use of automatic transmissions, the clutch torque characteristics and powertrain torque characteristics will change to a certain extent. The determination of the clutch estimated torque will affect the transient torque control of starting and shifting, and affect the quality of shifting. At present, when most automatic transmission manufacturers calculate the estimated clutch torque, they usually use the signal torque of the prime mover for torque estimation and self-learning, obtain the estimated clutch torque, and perform transient control based on the estimated clutch torque. However, in actual situations, there are many factors that cause torque accuracy errors, resulting in a deviation between the actual steady-state torque of the prime move...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a control method and device for a vehicle, gearbox and clutch torque to solve or partly solve the clutch torque determined according to the signal torque of the prime mover due to the deviation between the actual steady-state torque of the prime mover and the signal torque of the prime mover. The accuracy of estimating torque is low, causing technical problems of vehicle transient control abnormalities

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