Automatic control method of synchronizer for automatic transmission

A technology of automatic transmission and synchronizer, applied in transmission control, clutch, components with teeth, etc., can solve the problems of hysteresis, not very good effect, inconspicuous characteristics, etc., so as to reduce shifting noise and impact. Effect

Active Publication Date: 2017-04-26
GUANGZHOU AUTOMOBILE GROUP CO LTD
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Problems solved by technology

[0003] Among the existing patented technologies on synchronizers, most of them involve the structural design of the synchronizer, and less involve the control of the synchronizer. The control of the synchronizer is mostly based on the speed ratio or the control time of each stage to control the combination of the synchronizer. A single setting of a fixed combination speed and combination time, altho

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  • Automatic control method of synchronizer for automatic transmission
  • Automatic control method of synchronizer for automatic transmission

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Embodiment Construction

[0026] In order to further elaborate the technical means and effects that the present invention adopts to achieve the intended purpose, the specific implementation, method and steps of the automatic control method of the automatic transmission synchronizer proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments , structure, feature and effect, detailed description is as follows.

[0027] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the preferred embodiments with reference to the drawings. Through the description of specific implementation methods, the technical means and effects of the present invention to achieve the intended purpose can be understood more deeply and specifically, but the attached drawings are only for reference and description, and are not used to explain the pr...

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Abstract

The invention provides an automatic control method of a synchronizer for an automatic transmission. The method comprises the following steps of detecting a shifting-fork position signal and a rotational speed signal, and judging a current combination stage of the synchronizer; according to the combination stage at which the synchronizer is, adjusting hydraulic pressure and flow rate; and, according to the hydraulic pressure and flow rate, controlling the combination speed of the synchronizer. According to the method, through subdividing the combination and control stages and the combination pressure and flow rate of the synchronizer, on the premise of guaranteeing the demand of a driver, the noise of the synchronizer is effectively decreased; the wear of hardware for the synchronizer is avoided; and the gear shifting quality is improved.

Description

technical field [0001] The invention relates to the technical field of automobile manufacturing, in particular to an automatic control method for a synchronizer of an automatic transmission. Background technique [0002] In a vehicle transmission, a synchronizer is used to combine different gears to forcefully synchronize the main and driven gears of the transmission, thereby realizing the transmission of different speed ratios. Synchronizer control belongs to the shift control of automatic transmission, which involves issues such as power interruption time, smoothness of shifting, shifting noise and wear of synchronizer during the shifting process. [0003] Among the existing patented technologies on synchronizers, most of them involve the structural design of the synchronizer, and less involve the control of the synchronizer. The control of the synchronizer is mostly based on the speed ratio or the control time of each stage to control the combination of the synchronizer. ...

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Application Information

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IPC IPC(8): F16D48/02F16H61/02F16H61/30
CPCF16D48/02F16D2500/10456F16H61/0265F16H61/30
Inventor 张苏文邓云飞李晓波刘学武郭志方
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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