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A creep control method for dual-clutch automatic transmission

An automatic transmission and dual clutch technology, applied in control devices, driver input parameters, transportation and packaging, etc., can solve the problems of inability to judge the driver, signal failure, clutch disengagement, etc., and achieve compact and reliable peristalsis. Car comfort guarantee, avoid loss effect

Active Publication Date: 2018-03-20
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the brake pressure is lost, it is impossible to judge the driver's intention on the brake pedal, resulting in disengagement of the clutch, reporting a fault, and failing to realize the vehicle creep and subsequent driving functions
There are two reasons why there is no brake pressure signal in the vehicle. One is that the brake pressure signal in the ABS or ESC in the vehicle is not sent to the CAN bus, and the brake pedal itself has no pressure or position sensing signal. , The second is that the whole vehicle has this signal to the CAN bus, but it is inevitable that there will be signal failure, etc. After the signal fails, the driving function of the whole vehicle cannot be completed

Method used

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  • A creep control method for dual-clutch automatic transmission
  • A creep control method for dual-clutch automatic transmission
  • A creep control method for dual-clutch automatic transmission

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0022] refer to figure 1 A typical dual-clutch automatic transmission has two clutches, a first clutch C1 and a second clutch C2. The inner input shaft 11 and the outer input shaft 12 are nested inside and outside and connected to the first clutch C1 and the second clutch C2 respectively. Each gear driving gear is arranged on the inner input shaft 11 and the outer input shaft 12 , and each gear driven gear is arranged on the first output shaft 13 and the second output shaft 14 . The oil pump fills the clutch with oil, so that the first clutch C1 and the second clutch C2 are engaged or disengaged respectively, so that the torque from the engine is transmitted to the inner input shaft 11 or the outer input shaft 12, and different gears are selected by using synchronizers and other devices Group kneading to realize parking, first to sixth gear, reverse gear and other functions. The clutch speed sensor 1 is used to collect the clutch speed signal, the output shaft speed sensor 2 ...

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Abstract

The invention provides a double-clutch automatic transmission creeping control method. Under the condition that only a brake pedal switch signal is provided and no brake pressure signal is provided, the following control steps are executed, wherein the steps include that the vehicle speed is detected, and when the vehicle speed is 0, the position of a shifting lever is detected; and if the shifting lever is located at a forward gear or a reverse gear, pre-gear-engagement is conducted, and oil is injected in a current clutch to the kiss point. By the adoption of the method, it can be guaranteed that the whole vehicle creeping function can still be maintained when the brake pressure signal fails.

Description

technical field [0001] The invention relates to the field of gearbox control, in particular to a creep control method for a double-clutch automatic gearbox. Background technique [0002] A typical wet dual clutch transmission consists of two coaxial nested or parallel clutches, two coaxial, inner and outer nested input shafts, two parallel output shafts, and multiple clutches arranged on the output shafts. It consists of a synchronizer device, multiple shift forks and a differential. The odd and even gear input gears of the transmission are respectively arranged on the two input shafts, through the switching of the two clutches and the actions of different synchronizers, the torque conversion and output are realized through different output shafts. [0003] Creeping means that the driver of the vehicle puts the D gear or the R gear, releases the brake pedal, and does not step on the accelerator, or the accelerator opening is less than 4% (the specific value can be determine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W30/18B60W10/02B60W10/06B60W10/10
CPCB60W10/023B60W10/06B60W10/10B60W30/18054B60W2520/10B60W2540/16B60W2710/021B60W2710/0666
Inventor 辛航
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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