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Optimal Backshift Control Method for Dual Clutch Transmission

A technology of a dual-clutch transmission and a control method, applied in mechanical control devices, transmission device control, control/regulation systems, etc., can solve problems such as uneven backshifting and decreased user experience, and achieve improved shifting quality and shortened shift time. The effect of blocking time

Active Publication Date: 2021-06-11
SHANGHAI AUTOMOBILE GEAR WORKS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the unevenness of the reverse gear causes the user's sense of experience to decline

Method used

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  • Optimal Backshift Control Method for Dual Clutch Transmission
  • Optimal Backshift Control Method for Dual Clutch Transmission
  • Optimal Backshift Control Method for Dual Clutch Transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Such as figure 1 As shown, this embodiment adopts a 7-speed wet double-clutch shift fork to control the hydraulic system, including: 1 / 3 / 5 / 7 gears on odd-numbered shafts, 2 / 4 / 6 / R gears on even-numbered shafts, four Three-position four-way reversing flow valve (SCV1~SCV4), two two-position three-way pressure valves (GPCV1, GPCV2) and four shift forks, among which: R gear and 4 gear are realized by controlling the first shift fork through SCV1 and GPCV2 Upshift and reverse gear, 2nd gear and 6th gear control the second shift fork through SCV2 and GPCV2 to realize upshift and reverse gear, 1st gear and 5th gear control the third shift fork through SCV3 and GPCV1 to realize upshift and reverse gear, 3rd gear And the 7th gear realizes upper gear and back gear by controlling SCV4 and GPCV1 to control the fourth shift fork.

[0025] The pressure valve is a pressure reducing valve.

[0026] In this embodiment, the actual relative position of the shift fork measured by the pos...

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PUM

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Abstract

An optimized reverse gear control method for a dual-clutch transmission, characterized in that the actual absolute position of the shift fork is obtained through the absolute position and relative position conversion algorithm of the shift fork, and the pressure valve and the flow valve are controlled according to the actual absolute position through joint pressure, speed control and position control to achieve optimal gear back control; the absolute position refers to the position that remains unchanged during the entire life cycle of the gearbox, specifically: the neutral position and the in-stop points of each gear; the relative position It refers to the position of the fork in percentage form obtained by the fork position sensor. The present invention has been verified by actual vehicles, and while ensuring the smoothness, speed, accuracy and controllability of the shifting process, the invention effectively improves the shifting quality and shortens the shifting time, which can reach 80ms shifting back.

Description

technical field [0001] The present invention relates to a technique in the field of transmission control, in particular to an optimized reverse gear control method for a dual-clutch transmission. Background technique [0002] The shifting of the dual clutch transmission is realized by controlling the odd-even clutch and the shift fork, which improves the accuracy and speed of the control of the shift fork, and can optimize the working efficiency and performance of the dual clutch transmission. In the prior art, the unevenness of the reverse gear causes the user's sense of experience to decline. Contents of the invention [0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes an optimized backshift control method for a dual-clutch transmission. Through the conversion algorithm for the relative position and absolute position of the shift fork, the PID algorithm and the trigonometric filter algorithm are used to further ensure the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/04F16H63/32F16H61/02
CPCF16H61/0204F16H61/0437F16H63/32F16H2061/0481
Inventor 宋秀锋宋勇道王小飞李育唐莹
Owner SHANGHAI AUTOMOBILE GEAR WORKS