Limp home control method of double-clutch automatic transmission

An automatic transmission, limp home technology, applied in the direction of transmission control, toothed components, belts/chains/gears, etc., can solve problems such as danger, inability to realize limp home, and inability to carry out, so as to improve driving safety sexual effect

Active Publication Date: 2014-11-05
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, first of all, the premise of this method is that one of the two input shaft speed sensors can still work normally, and the limp home function cannot be realized when the entire set of input shaft speed sensors are abnormal; secondly, this method still needs to stop to shift ...

Method used

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  • Limp home control method of double-clutch automatic transmission
  • Limp home control method of double-clutch automatic transmission
  • Limp home control method of double-clutch automatic transmission

Examples

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Embodiment Construction

[0022] In the embodiments described below, although a wet dual-clutch automatic transmission with two output shafts is used as an example for illustration, the control method of the present invention can also be applied to a single output shaft or multiple output shafts, dry type dual-clutch automatic transmission, and the number of gears is not limited to this embodiment.

[0023] refer to figure 1 , In the wet dual-clutch automatic transmission, the clutch switching is realized by pressurizing the two clutches through the oil pump. The clutch speed sensor 1 collects the clutch input speed signal (that is, the clutch driving disc speed), the first clutch pressure sensor 9 collects the first clutch pressure signal, the second clutch pressure sensor 10 collects the second clutch pressure signal, the inner input shaft 11 and the first The clutch is connected, and the outer input shaft 12 is connected with the second clutch. On the outer input shaft 11, there are 1st gear drivi...

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PUM

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Abstract

The invention provides a limp home control method of a double-clutch automatic transmission. The limp home control method includes collecting vehicle speed signals, clutch input rotating speed signals, rotating speed signals of an inner input shaft, rotating speed signals of an outer input shaft, rotating speed signals of an output shaft and position signals of a gear-shifting shift fork; when the position signals of the gear-shifting shift fork are lost completely, checking whether a current gear position is matched or not according to the vehicle speed signals, the clutch input rotating speed signals and speed ratio of the current gear position; if yes, maintaining the current gear position for traveling, and if not, performing odd-even gear position switching. By the limp home control method, a vehicle can be maintained to normally travel without stopping under the condition that the position signals of the shift fork are lost completely, so that traveling safety is improved.

Description

technical field [0001] The invention relates to the field of automobile transmission control, in particular to a control method for a double-clutch automatic transmission limp home. Background technique [0002] Dual-clutch automatic transmission includes two coaxial nested or parallel arranged clutches, coaxial, inner and outer inner and outer nested input shafts and outer input shafts, output shafts, multiple synchronizer devices arranged on the output shafts, multiple It consists of a shift fork and a differential. The driving gears of the odd and even gears of the transmission are arranged on the inner and outer input shafts respectively, through the switching of two clutches and the actions of different synchronizers, torque conversion and output are realized. [0003] The limp home function refers to the fact that some parts of the transmission are damaged and cannot complete the normal use function, but it can still realize the output of vehicle power within a certai...

Claims

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Application Information

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IPC IPC(8): F16H61/18F16H63/42
CPCF16H61/12F16H63/42F16H2061/1208F16H2061/1224F16H2061/1244
Inventor 辛航尹良杰桂鹏程
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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