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Method and system for controlling active limp home returning mode entering of automatic gearbox

A limp home mode, automatic transmission technology, applied in the direction of transmission control, toothed elements, belts/chains/gears, etc., can solve the problem of no fault limp home mode distinction, can not be better protected automatic transmission issues

Active Publication Date: 2014-08-13
SHENGRUI TRANSMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a control method and system for an automatic gearbox to actively enter the limp home mode, so as to solve the problem in the prior art that only judging whether the current automatic gearbox fault triggers the limp home mode, does not According to the severity of the fault, the way of limp home is distinguished in detail, so that the problem of automatic transmission can not be better protected

Method used

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  • Method and system for controlling active limp home returning mode entering of automatic gearbox
  • Method and system for controlling active limp home returning mode entering of automatic gearbox
  • Method and system for controlling active limp home returning mode entering of automatic gearbox

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Embodiment 1

[0048] see figure 1 , figure 1 It is a flow chart of a control method for an automatic transmission to actively enter a limp home mode provided by an embodiment of the present invention. like figure 1 As shown, the method includes:

[0049] Step S101: Obtain the fault response value of the automatic transmission actively entering the limp home mode;

[0050] Specifically, before the step S101, it also includes: detecting the running state of the automatic transmission, and judging whether there is a fault in the automatic transmission. Specifically, it can be judged whether there is a fault in the automatic transmission by detecting the oil pressure, rotational speed and current value.

[0051] Step S102: Judging whether the fault response value is equal to the different trigger values ​​corresponding to different modes of entering limp home; when the fault response value is equal to the trigger value of a certain mode of entering limp home different modes, execute step S...

Embodiment 2

[0059] see figure 2 , figure 2 It is a flow chart of another control method for the automatic transmission to actively enter the limp home mode provided by the embodiment of the present invention. like figure 2 As shown, the method includes:

[0060] Step S201: Obtain the fault response value of the automatic transmission actively entering the limp home mode;

[0061] Step S202: judging whether the fault response value is equal to the first trigger value;

[0062] Specifically, the first trigger value is a trigger value corresponding to immediately entering the limp home mode among different modes of entering limp home, and is optionally 1. The judgment result of step S202 is recorded as the first judgment result, including: yes or no. When the first judgment result is yes, execute step S203; otherwise, execute step S204.

[0063] Step S203: controlling the automatic transmission to immediately enter the limp home mode corresponding to the first trigger value;

[006...

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Abstract

The invention discloses a method and system for controlling active limp home returning mode entering of an automatic gearbox. The method comprises the step of obtaining a fault response value of the active limp home returning mode entering of the automatic gearbox, the step of judging whether the fault response value is equal to different triggering values corresponding to entering of different limp home returning modes or not and the step of controlling the automatic gearbox to enter the limp home returning mode corresponding to the triggering value when the fault response value is equal to the triggering value of one mode in different limp home returning modes. By means of the method and system for controlling active limp home returning mode entering of the automatic gearbox, the automatic gearbox can be automatically controlled to carry out detailed distinguishing on the limp home returning modes according to the fault severity degrees, and therefore the automatic gearbox can be better protected.

Description

technical field [0001] The present invention relates to the technical field of automatic transmission fault processing, in particular to a control method and system for an automatic transmission to actively enter a limp home mode. Background technique [0002] An automatic transmission is a device that can automatically shift gears according to the engine speed relative to the manual transmission. The advent of automatic transmissions eased the driver's sense of tension when driving a car. Since there is no need to change gears during driving, the driver can concentrate on observing the situation around the vehicle, and thanks to the precise electronic control device, the automatic transmission can not only adapt to various driving conditions, but also to different driving styles. This means that the shifting timing depends on the driving style, engine load, vehicle speed and engine speed, so that the available power of the engine is fully utilized. [0003] Of course, aut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/12
CPCF16H61/12F16H2061/1212F16H2061/1224F16H2061/1232F16H2061/124
Inventor 刘祥伍辛彩云鲁曦李强秦春磊
Owner SHENGRUI TRANSMISSION
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