Synchronizer self-learning identification control method and position verification control method

Abstract

The invention provides a synchronizer self-learning identification control method and a vehicle synchronizer position verification control method based on the synchronizer self-learning identification control method. According to the synchronizer self-learning identification control method, forward and reverse rotation of a gear selection and shifting motor are controlled, the voltage change of a gear selection and shifting position sensor is monitored so as to identify the state of a synchronizer reaching extreme positions, the voltage value of the position sensor when the synchronizer is at each extreme position is recorded, and therefore self-learning identification of gear selection information and gear shifting information of the synchronizer is realized. According to the position verification control method, when a speed changer reaches a bottom line, a vehicle runs for a certain period of time and the vehicle cannot be started normally due to gear selection and shifting, the synchronizer self-learning identification control method is adopted for learning and identification of the gear selection information and the gear shifting information. By means of the synchronizer self-learning identification control method and the position verification control method, the problem that the synchronizer is inaccurate in position because of multiple factors is effectively eliminated, gear selection and shifting of the vehicle can be based on a correct synchronizer position, and therefore the correctness of gear selection and shifting of the vehicle is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of synchronizer control, and relates to a synchronizer control method. Background technique [0002] In an automatic mechanical transmission (Auto Matic Mechanical Transmission, referred to as AMT), although the bottom layer of the transmission control unit (Transmission Control Unit, referred to as TCU) is usually the position value or voltage for the feedback of the synchronizer gear selection and shift position sensor However, since the initial installation positions of the gear selection and shift actuators of each transmission cannot be exactly the same, the exact synchronizer position cannot be obtained in the control strategy, so it is impossible to respond to the request from the TCU for new gear selection. [0003] In addition, after the vehicle has been running for a period of time, the wear degree of the synchronizer assembled by different vehicles is different, and the position value obtained by ...

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Problems solved by technology

[0003] In addition, after the vehicle has been running for a period of time, the wear degree of the synchronizer assembled by different vehicles is different, and the position value obtained by the TCU is inaccurate, or when the vehicle is reassembled after a breakdown repair, the TCU cannot obtain the exact position information of the synchronizer. New gear selection requests from the TCU were not properly implemented at these times

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