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Clutch pre-engagement control system and method in automatic transmission

A technology of transmission control and automatic transmission, applied in clutch, transmission control, mechanical equipment and other directions, can solve the problems of abnormal flameout of automatic transmission vehicles, violent vehicle vibration, unevenness, etc., to achieve comfortable, efficient and safe engagement, and prevent abnormal flameout. Effect

Active Publication Date: 2016-12-28
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The clutch engagement control strategy is directly related to the smoothness and safety of vehicle power transmission. Improper clutch engagement control methods will cause abnormal stalling of automatic transmission vehicles, excessive vehicle vibration or weak torque transmission during clutch engagement.
In addition, due to the limitation of engine torque, as the clutch pressure increases, the probability of abnormal engine flameout and uneven power transmission is also increased.

Method used

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  • Clutch pre-engagement control system and method in automatic transmission
  • Clutch pre-engagement control system and method in automatic transmission
  • Clutch pre-engagement control system and method in automatic transmission

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Embodiment Construction

[0024] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0025] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of 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 present invention limit.

[0026] The embodiment of the present invention proposes a clutch pre-engagement control system in an automatic tr...

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Abstract

The invention discloses a clutch pre-engagement control system of an automatic transmission. The clutch pre-engagement control system comprises a transmission control unit and an engine control unit, wherein the transmission control unit obtains a rotation speed offset to be compensated to the revolution speed of an engine under a target gear according to the target gear of a synchronizer before a clutch is engaged, and transmits a revolution speed request signal to the engine control unit; and the engine control unit regulates the target revolution speed of the engine under the target gear according to the revolution speed request signal in real time, so that the target revolution speed of the engine under the target gear is passively increased to be equal to the sum of the idle speed of the engine and the revolution speed offset. According to the clutch pre-engagement control system of the automatic transmission, which is disclosed by the invention, the transmission control unit transmits a torque request signal to the engine control unit when the clutch is engaged, the engine control unit regulates the torque of the engine according to the size of the input torque of the clutch in real time, so that the torque of the engine is subjected to real-time compensation and the abnormal flameout of the engine is prevented.

Description

technical field [0001] The invention relates to the technical field of automatic transmissions, in particular to the control technology related to clutch preparatory engagement control strategies in automatic transmissions. Background technique [0002] In the current automatic transmission, the clutch preparation control strategy is a very important part of the control strategy. The pre-engagement of the clutch refers to the control of the speed synchronization between the driving disc and the driven disc of the clutch, and then the transmission control unit makes a torque request to the engine control unit according to the target gear. The clutch engagement control strategy is directly related to the smoothness and safety of vehicle power transmission. Improper clutch engagement control methods will cause abnormal stalling of automatic transmission vehicles, excessive vehicle vibration or weak torque transmission during clutch engagement. In addition, due to the limitatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/04F16H63/50F16D48/02
Inventor 周一成陈勇罗大国刘文忠冯擎峰
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
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