A limp-home control method for a dual-clutch automatic transmission

An automatic transmission, limp home technology, applied in transmission control, elements with teeth, belts/chains/gears, etc., can solve problems such as impossible, dangerous, unable to achieve limp home, etc.

Active Publication Date: 2016-03-16
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 all the speed sensors inside the transmission are abnormal; secondly, this method still needs to stop for gear switching , which is still very dangerous during driving; once again, this method can only drive in the set gear, and cannot perform normal gear switching, but when the road conditions are complicated, or when driving on the expressway, it must Smooth gear shifting is the only way to ensure safety

Method used

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  • A limp-home control method for a dual-clutch automatic transmission
  • A limp-home control method for a dual-clutch automatic transmission
  • A limp-home control method for a dual-clutch automatic transmission

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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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Abstract

The invention provides a limping-home control method for an automatic double-clutch transmission. The limping-home control method includes acquiring car speed signals, input rotation speed signals of clutches, rotation speed signals of an inner input shaft, rotation speed signals of an outer input shaft, rotation speed signals of an output shaft and position signals of a gearshift lever; checking whether a current gear is matched or not according to speed ratio of the car speed signals, the input rotation speed signals of the clutches and the current gear are lost completely; if yes, keeping running of the current gear, and if not, switching in odd-even gears. A car can be kept normal running without pulling over under the condition of loss of the position signals of the lever, and running 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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Patent Type & Authority Patents(China)
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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