AMT sliding friction clutch type in-situ gear shifting synchronous control method

Abstract

The invention discloses an AMT sliding friction clutch type in-situ gear shifting synchronous control method, and belongs to the field of in-situ gear engaging and gear shifting of AMTs (Automated Mechanical Transmissions) without synchronizers. After an AMT program is initialized, a relation curve of the rotating speed of a joint gear sleeve and the duty ratio of a TB under each gear is recordedand stored. After a gear engaging or shifting instruction is sent out, a clutch is controlled to be opened to a target position to enter a sliding abrasion state or a semi-linkage state, the duty ratio of the TB is controlled, and a joint gear ring is kept in a low-speed state. Under a stable low-speed state, a gear executing mechanism pushes the joint gear sleeve to be meshed with a target jointgear ring to complete gear engagement. The problem that the operation needs to be repeated from the beginning when meshing does not succeed at the first attempt and the problem that the gear can be damaged by a high rotating speed are avoided, the gear shifting time is shortened, gear damage is reduced, and gear shifting noise is lowered. A synchronous rotating speed window is stable, and combination can still be repeatedly tried after first-time tooth alignment.

Description

technical field [0001] The invention belongs to the field of in-situ gear shifting and shifting of an AMT automatic transmission without a synchronizer, and in particular relates to an AMT sliding-grinding clutch-type in-situ shifting synchronization control method. Background technique [0002] During the shifting process of the traditional manual transmission, the quick meshing of the engaging gear sleeve and the engaging ring gear is realized by the synchronizer, but if the synchronizer is also used in the AMT gearbox (electromechanical automatic transmission), it will bring Come to the problem of frequent replacement of synchronizer parts. Especially in the field of commercial vehicles. [0003] Therefore, most AMT gearboxes do not have a synchronizer. The current way to achieve rapid synchronization and meshing of the engaging ring gear and the target engaging ring gear during the shifting process is: after the speed of the engaging ring gear is increased to a higher s...

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