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A Pneumatic Control Method of Synchronizer Shift Based on On-Off Valve

A technology of switching valves and synchronizers, which is applied in the direction of transmission control, components with teeth, belts/chains/gears, etc., which can solve the problems of reduced shift quality, high speed of synchronizer movement, abnormal noise of synchronizer teeth, etc. problems, to achieve the effect of reducing the impact noise of the end face, improving the quality of shifting, and increasing the service life

Active Publication Date: 2021-08-10
FAW JIEFANG AUTOMOTIVE CO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, pneumatic control has the disadvantages of high compressibility of compressed air, strong time delay and strong nonlinearity.
During the shifting process of the synchronizer, the shifting impact and shifting noise caused by the pneumatic shift actuator are relatively large, which reduces the shifting quality, reduces the service life of the synchronizer, and even causes the synchronization function of the synchronizer to fail, resulting in "tooth-beating abnormality". "ringing" phenomenon; at the end of the synchronizer shifting, the synchronizer moves at a higher speed, resulting in a greater end-face impact noise

Method used

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  • A Pneumatic Control Method of Synchronizer Shift Based on On-Off Valve

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Embodiment Construction

[0033] Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

[0034] According to the moving position and moving speed of the synchronizer, the present invention divides the shifting process of the synchronizer into a shifting stage, a synchronizing stage, a ring shifting stage and a shifting stage. The shifting phase is the shifting process from the start of the shifting process to the synchronizer moving to the synchronous position; the synchronizing phase is the shifting phase from the synchronizer moving to the synchronizing position to the synchronizer starting to move. In the synchronizing phase, the synchronizer moves After the stop, the motion will be kept at a stopped state; the shifting stage is the shifting process from the end of the synchronization stage to the complete unlocking of the axial movement of the synchronizer, and the shifting stage is the shifting process from the end of the synchroniz...

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Abstract

The invention provides an on-off valve-based pneumatic control method for synchronizer shifting. According to the moving position and moving speed of the synchronizer, the synchronizer shifting process is divided into a shifting stage, a synchronizing stage, a ring shifting stage and a shifting stage. Adopting the pneumatic buffer control function in the gear-off stage, the pneumatic buffer control function in the ring shifting stage and the pneumatic buffer control function in the gear-in stage, during the shifting process of the synchronizer, the impact of the contact of the synchronizer ring at the beginning of the synchronizer is reduced, and the synchronizer is improved. The service life ensures reliable locking function, prevents the phenomenon of "squeaking teeth", reduces the end face impact noise at the end of shifting, and improves shifting quality.

Description

technical field [0001] The invention belongs to the technical field of automatic transmission control, and in particular relates to an on-off valve-based pneumatic control method for synchronizer gear shifting. Background technique [0002] Synchronizer shifting, as a typical shifting method, is widely used in automatic transmissions. Actuators for synchronizer shifting include electric shift actuators, hydraulic shift actuators and pneumatic shift actuators. Pneumatic shifting method has the advantages of low cost, fast shifting action, simple structure, etc. Pneumatic shift actuators are widely used in automatic transmissions equipped with synchronizers. [0003] However, pneumatic control has disadvantages such as high compressibility of compressed air, strong time delay and strong nonlinearity. During the shifting process of the synchronizer, the shifting impact and shifting noise caused by the pneumatic shift actuator are relatively large, which reduces the shifting q...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/04
CPCF16H61/0403
Inventor 于跃王巍巍王继昆柳英杰贾玉哲于洁清刘四海赵军赫建勇谷守功
Owner FAW JIEFANG AUTOMOTIVE CO
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