Speed changer synchronizer synchronous self-adaptation control method and system

Abstract

The invention discloses a speed changer synchronizer synchronous self-adaptation control method and system. The method comprises the steps that data acquiring and effectiveness judgment are conducted,specifically, operation data of a synchronizer in the current synchronous process are acquired, whether all the data belong to effective data or not are judged, and synchronizing force in the currentsynchronous process is recorded when all the data are effective data; stiffness deformation of a shifting fork under the action of the synchronizing force is obtained through calculation; and a new synchronous position value is obtained through calculation and stored in a storage of a gear shifting control system in a replacing mode to serve as a subsequent gear engaging reference. In the synchronous self-adaptation process, the effective data can be prejudged emphasically, unnecessary synchronous self-adaptation errors are prevented, and calculation burden is greatly reduced; and the adoptedupdated gear shifting synchronous position value is still evaluated, thus, in the process from the beginning to the end of the service life, the gear shifting evaluation standard is unchanged, and the actuating results of gear shifting are kept uniform.

Description

technical field [0001] The invention relates to the technical field of automatic transmissions, in particular to a synchronization adaptive control method and system for a transmission synchronizer. Background technique [0002] Automatic transmissions are increasingly popular in the market, and users have increasingly stringent requirements on the performance of automatic transmissions. For developers, it is an inevitable requirement to ensure that the performance of the transmission, especially during its life cycle, remains stable. [0003] The transmission with synchronizer structure often needs to use the synchronous position value as the reference signal of the transmission controller when shifting gears. When the shift stroke sensor monitors that the shift fork movement is close to or reaches the pre-synchronization position on the mechanical design value, The transmission controller needs to start applying synchronizing force to the synchronizer to achieve synchroni...

AI Technical Summary

Problems solved by technology

[0004] Since the control goal of the synchronization process is to complete smooth synchronization actions under different speed differences within a limited time period, if the synchronization position is not accurate, it may cause problems such as: too long pre-synchronization time, large impact at the beginning of synchronization, and poor smoothness. This change can cause the driving experience to change or worsen over the life cycle

The biggest factor causing inaccurate synchronous position is the wear of the synchronous ring, and the wear of the synchronous ring will also lead to more inaccurate synchronous position, forming a vicious circle

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