Gear shifting control method and system of automatic transmission and vehicle

A technology of automatic transmission, control method, applied in the direction of transmission control, elements with teeth, belt/chain/gear, etc., can solve the problems of not taking into account the speed of the joint sleeve, increasing the shifting time, not taking into account, etc., Achieve smooth shifting process, improve shifting quality and reduce wear and tear

Active Publication Date: 2016-11-23
GREAT WALL MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the synchronous stage, since the position of the shift fork is not considered to be constant during synchronization, the shift fork force is a constant value, which increases the shifting time; after synchronization, the speed when the engaging sleeve moves to the engaging ring gear is not considered, which is easy There is a problem with shift shock

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  • Gear shifting control method and system of automatic transmission and vehicle
  • Gear shifting control method and system of automatic transmission and vehicle
  • Gear shifting control method and system of automatic transmission and vehicle

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Embodiment Construction

[0031] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0033] figure 1 It is a flowchart of a shift control method of an automatic transmission according to an embodiment of the present invention.

[0034] Such as figure 1 As shown, the shift control method of an automatic transmission according to an embodiment of the present invention includes the following steps:

[0035] Step S101: During the shifting process, when the position of the shift fork is between the neutral position X1 and the synchronous position X2, control the shift fork to move at a target speed. In one embodiment of the present invention, the position of the shift fork can be collected by a position sensor.

[0036] Specifically, as figure 2 As shown, step S101 spec...

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PUM

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Abstract

The invention provides a gear shifting control method and system of an automatic transmission and a vehicle. The method comprises the steps that in the gear shifting process, a gear shifting fork is controlled to move at a target speed; the rotation speed of a synchronizer is adjusted, so that when the speed difference between the rotation speed of the synchronizer and the rotation speed of an engaging tooth reaches the target speed difference, the synchronizer and the engaging tooth are controlled to be synchronous until the rotation speed of the synchronizer and the rotation speed of the engaging tooth are equal, and synchronization of the synchronizer and the engaging tooth is completed; the gear shifting fork is controlled to move at the target speed; and when the rotation speed of the synchronizer and the rotation speed of the engaging tooth are not equal, the synchronizer and the engaging tooth are controlled to be engaged with each other to achieve gear shifting. The method has the advantages of being smooth in gear shifting process and improving the gear shifting quality.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a shift control method, system and vehicle of an automatic transmission. Background technique [0002] For automatic transmissions, the shift fork (fork) control strategy directly affects the smoothness of shifting and the life of related mechanical components. In the process of shifting, the phenomenon of shifting shock is prone to occur, especially in the process of moving the engaging sleeve to the engaging ring gear after the synchronization is completed. This is because after the synchronization is completed, the force of the fork is too large, causing the fork to move too fast, causing a "knocking" sound, resulting in a shifting shock. However, if the fork force is too small, the coupling sleeve may not be able to move the synchronous ring or the synchronous condition is destroyed and the shifting cannot be completed. [0003] In the related art, the shifting process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H63/04F16H61/02F16H59/68
Inventor 李顺波刘婧
Owner GREAT WALL MOTOR CO LTD
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