Self-learning Method of Lock-up Clutch in Hydraulic Torque Converter

Abstract

The invention provides a self-learning method for a lock-up clutch in a hydraulic torque converter. The time required to detect the reverse point is obtained by recording the slip speed of the lock-up clutch in real time during the change stage of the lock-up clutch from unlocking to locking; Then, judge the relationship between the time required to detect the reversal point and the ideal value, and then correct the self-learning value of the transfer point in the changing stage and store it in the memory; then, in the next process from unlocking to locking, Read the correction result stored in the memory, and add the correction result to the basic value of the torque transmission stage in the process of locking the clutch from unlocking to locking, and continue to record the time required to detect the reverse point until two consecutive times The time difference of the time required to detect the reversal point is within the allowable time range. Based on the self-learning method of the lock-up clutch in the hydraulic torque converter of the present invention, the wear and assembly errors of the lock-up clutch can be effectively compensated, thereby ensuring the effectiveness of the control strategy.

Description

technical field [0001] The invention relates to the technical field of automatic transmission control, in particular to a self-learning method for a locking clutch in a hydraulic torque converter. Background technique [0002] Automatic transmission (AT for short) is composed of hydraulic torque converter, planetary gear transmission and control mechanism. The automatic transmission can automatically change the speed and torque according to the road conditions, and the driver can concentrate on the road traffic without being confused by gear shifting. [0003] Among them, the hydraulic torque converter is an indispensable part of the AT as a low-speed torque increasing and buffering device in the automatic transmission. However, when the engine speed gradually increases, the oil churning loss will increase, and the efficiency of the torque converter will decrease without increasing the torque, further affecting the fuel consumption of the vehicle. Adding a lock-up clutch t...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a self-learning method for lock-up clutches in hydraulic torque converters to solve the problems of different degrees of wear and assembly errors in the lock-up clutches as the use time of automatic transmissions increases in the prior art

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