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Gearbox control unit and its shift fork and clutch cooperative control method

A collaborative control, clutch technology, applied in transmission control, elements with teeth, belts/chains/gears, etc., to improve user experience, eliminate vibration and noise

Active Publication Date: 2019-05-10
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the embodiments of the present invention is to eliminate the vibration and noise of the clutch shaft system due to sudden load changes and improve driving comfort

Method used

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  • Gearbox control unit and its shift fork and clutch cooperative control method
  • Gearbox control unit and its shift fork and clutch cooperative control method
  • Gearbox control unit and its shift fork and clutch cooperative control method

Examples

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Embodiment Construction

[0026] figure 1 It is a schematic diagram of the transmission structure of a dual-clutch transmission when a vehicle in the prior art coasts and downshifts at a low speed. Such as figure 1 As shown, when the vehicle is coasting and downshifting at a low speed, the odd-numbered clutch Tc1 is in a slipping state, and the even-numbered clutch Tc2 is in a fully opened state. At this time, the even-numbered output shaft Nout2 is connected to the main reducer, and it is also in linkage with the odd-numbered input shaft Nin1 and the odd-numbered output shaft Nout1, so when the even-numbered gear shift fork (2, 4 gear shift fork) In the process of pushing the synchronizer to synchronize, a sudden load change on the shaft system of the odd input shaft Nin1 and the odd output shaft Nout1 is caused, which causes the shaft system of the odd input shaft Nin1 and the odd output shaft Nout1 to produce vibration and noise.

[0027] figure 2 It shows a schematic diagram of the change trend of br...

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Abstract

The invention provides a gearbox control unit and a shift fork and clutch cooperative control method thereof. The method comprises the steps that when it is determined that a vehicle is in a low speed taxiing downshift operating condition and a shift fork is detected to start engaging a gear, the pressure of a clutch in a sliding friction condition is increased to a preset pressure value till the shift fork finishes engaging the gear; and when it is determined that the shift fork finishes engaging the gear, the pressure of the clutch in the sliding friction condition is controlled to return to the pressure when the shift fork is started to engage the gear. The gearbox control unit and the shift fork and clutch thereof cooperative control method can eliminate the vibration noise generated by the clutch shaft caused by the load sudden change and improve the comfort of driving.

Description

Technical field [0001] The invention belongs to the technical field of automobiles, and particularly relates to a gearbox control unit and a coordinated control method for shift forks and clutches. Background technique [0002] The basic function of the automobile drive train is to transfer the power generated by the automobile engine to the wheels. In the development process of automobile transmission, automatic transmission has always been the goal pursued by people. With the widespread application of computer technology in the automotive field, automatic transmission technology has developed rapidly. With the increasing popularity of cars today, the application of automotive automatic transmissions has more important significance. The dual clutch automatic transmission is a new generation of automatic transmission. It inherits the advantages of manual transmission, such as high transmission efficiency, compact structure, light weight, and low price. It has excellent startin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/04
CPCF16H61/0437F16H2061/0459F16H2306/00
Inventor 孙贤安王小军焦伟边淑伟马春狮冯巍陈亮
Owner SAIC MOTOR
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