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Start control method of wet six-speed dual-clutch transmission

A control method, dual-clutch technology, applied in transmission control, components with teeth, belts/chains/gears, etc., can solve problems such as inability to optimize control, achieve large driving force, reduce sliding wear, The effect of small speed fluctuations

Active Publication Date: 2017-08-15
SHANGHAI AUTOMOBILE GEAR WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology cannot perform optimal control when starting in first gear

Method used

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  • Start control method of wet six-speed dual-clutch transmission
  • Start control method of wet six-speed dual-clutch transmission
  • Start control method of wet six-speed dual-clutch transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 Shown is the start control flow chart of the wet six-speed dual-clutch transmission described in this embodiment, and the specific steps of this embodiment include:

[0029] In step a, the TCU determines whether the starting conditions are met according to the position of the ignition switch of the engine, the braking situation, the position of the shift lever, the speed of the vehicle, and the opening of the accelerator pedal. The signal of opening degree and brake light comes from the vehicle controller. The braking situation is judged according to the signal information of the brake light. The signal of the brake light is 1, which means braking, and the signal of the brake light is 0, which means no braking. When it is detected that the ignition switch of the engine is in the ON position, the position of the shift lever is in a position other than P or N, there is no brake, the vehicle speed is lower than the threshold set based on the actual gear l...

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Abstract

Provided is a starting control method for a wet-type six-speed dual-clutch type speed changer. Under the starting working condition, a first gear or a second gear adopted for normal starting is judged according to a target gear, the engagement situation of the target gear and a transmission gear and whether a target gear synchronizer moves or not; in the second-gear normal starting process, when the requirement for downshifting the second gear to the first gear is met, starting is achieved after downshifting, and clutch switching control for downshifting the second gear to the first gear in the starting process is provided. According to the starting control method for the wet-type six-speed dual-clutch type speed changer, gear switching can be conducted in the second-gear normal starting process to downshift the second gear to the first gear for starting, slipping friction of clutches can be reduced, rapid starting is achieved, and the starting acceleration performance of vehicles is improved.

Description

technical field [0001] The invention relates to a technology in the field of transmissions, in particular to a starting control method for a wet six-speed dual-clutch transmission. Background technique [0002] The goal of clutch control during the starting process of a vehicle equipped with DCT is to control the smooth engagement of the master and driven ends of the clutch according to the driver's driving intention, to ensure the smooth start of the vehicle, reduce the slipping of the clutch, and ensure the stable operation of the engine to prevent The engine speed fluctuates greatly, causing the engine to shake. Launch control is one of the key technologies of dual-clutch transmission. It not only needs to ensure the performance of the vehicle, but also needs to respond well to the driver's driving intention. [0003] At present, the starting strategy of vehicles equipped with DCT adopts the first gear or the second gear to start, but it is rare to control the switching ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/02F16H59/74F16H59/44F16H59/56F16H61/68
CPCF16H59/44F16H59/56F16H59/74F16H61/02F16H61/68
Inventor 彭耀润宋勇道唐莹李育
Owner SHANGHAI AUTOMOBILE GEAR WORKS
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