Method for controlling synchronous impact of clutch

Abstract

The invention relates to a method for controlling a clutch, in particular to a method for controlling synchronous impact of the clutch. The method uses the control strategy to reduce the friction torque before synchronizing through reducing the joint pressure at the slipping friction stage of the clutch so as to reduce the synchronous impact. The joint position of the clutch is determined according to the rotary speed of the slipping friction and the change of the change rate of the rotary speed of the slipping friction, namely, the execution mechanism of the clutch moves forwards at the beginning of the jointing stage of the clutch, so that the joint position can be quickly reduced, the friction torque can be quickly enlarged, and the slipping friction time and the slipping friction work at the stage can be reduced as far as possible; and the execution mechanism of the clutch is controlled to move oppositely when synchronization is about to be achieved, namely, the rotary speed of the slipping friction reaches a certain value, so that the joint position can be enlarged, and the friction torque before synchronization can be reduced so as to reduce the synchronous impact of the clutch in the jointing process. According to the control method provided by the invention, the impact at the synchronizing time is effectively reduced, and the slipping friction is not remarkably increased in the joint process. The control method is simple and has strong instantaneity.

Description

technical field [0001] The invention relates to a clutch control method, in particular to a clutch synchronous shock control method. Background technique [0002] At present, in cities with congested traffic, the clutch is used more and more frequently during vehicle driving. However, whether it is AT, AMT, or DCT, there is a problem of clutch synchronization shock during the vehicle starting process, which reduces the vehicle's ride comfort. Therefore, how to reduce the impact of clutch synchronization has always been a key and difficult point of research at home and abroad. The electromechanical automatic transmission (AMT) is based on the traditional mechanical transmission (MT), and an electronic control system (TCU) is added to simulate the driver's operation intention to realize the separation and engagement of the clutch, gear selection, and gear shifting. operating automatic transmission. AMT has a simple structure and low cost, can realize the transmission of high...

AI Technical Summary

Problems solved by technology

The above-mentioned research work is all focused on the research of the clutch engagement control algorithm, and there is no countermeasure and systematic analysis on how to control the impact during the clutch engagement process, especially the synchronous impact.

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