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Method and system for controlling gear disengagement and engagement of wet-type double-clutch coaxial shifting fork and vehicle

A control method and a technology for shifting gears, applied in the control field of wet dual clutches, can solve the problems of affecting the drivability of the whole vehicle, taking a long time, affecting the power switching, etc. The effect of improving the dynamic response time

Active Publication Date: 2021-09-07
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shift fork returns to the empty space first, and then shifts into gear, which takes a long time and affects the power switching, thereby affecting the drivability of the vehicle

Method used

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  • Method and system for controlling gear disengagement and engagement of wet-type double-clutch coaxial shifting fork and vehicle
  • Method and system for controlling gear disengagement and engagement of wet-type double-clutch coaxial shifting fork and vehicle
  • Method and system for controlling gear disengagement and engagement of wet-type double-clutch coaxial shifting fork and vehicle

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with accompanying drawing.

[0035] Such as figure 1 As shown, a wet double-clutch coaxial shift fork control method for removing and engaging gears includes the following steps:

[0036] Step 1. Determine whether the current pre-engaged gear and the target gear are on the same axis, if yes, go to step 2, otherwise go to step 5.

[0037] Step 2. According to the hardware structure of the transmission, judge whether it is the same shift fork, if yes, go to step 3, otherwise go to step 4.

[0038] Step 3: The system selects the strategy of coaxial and coaxial shift fork to remove and engage gears to perform the action of shift fork to remove and engage gears. After the gear is engaged, the process ends.

[0039] Step 4: The system selects the strategy of coaxial different shift forks to remove and engage gears to perform the action of shifting forks to remove and engage gears. After the gear is engaged...

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Abstract

The invention discloses a method and system for controlling gear disengagement and engagement of a wet-type double-clutch coaxial shifting fork and a vehicle. The method comprises the following steps that 1, whether a current pre-engagement gear and a target gear are located on the same shaft or not is judged, if yes, the step 2 is executed, and otherwise, the step 5 is executed; 2, whether shifting forks are the same shifting forks or not is judged according to a hardware structure of a transmission, if yes, the step 3 is executed, and otherwise, the step 4 is executed; 3, the system selects a coaxial and shifting fork gear disengagement and engagement strategy to carry out shifting fork gear disengagement and engagement action; 4, the system selects a coaxial different shifting fork gear disengagement and engagement strategy to perform the shifting fork gear disengagement and engagement action; and 5, the system selects a non-coaxial shifting fork gear disengagement and engagement strategy to the perform shifting fork gear disengagement and engagement action. According to the method and system for controlling the gear disengagement and engagement of the wet-type double-clutch coaxial shifting fork and the vehicle, the gear disengagement and engagement time can be shortened during coaxial gear disengagement and engagement, and the dynamic response is improved, so that the whole vehicle drivability is improved.

Description

technical field [0001] The invention belongs to the technical field of control of wet double clutches, and in particular relates to a control method, system and vehicle for removing and engaging gears of wet double clutch coaxial shift forks. Background technique [0002] The wet dual-clutch automatic transmission can be regarded as two sub-transmissions, one for odd-numbered gears, the other for even-numbered gears and reverse gears, and each sub-transmission has complete transmission functions. Driven by the electronic control unit and the hydraulic system, the clutch transmission fork is removed and engaged, and the clutch is switched, so as to realize the uninterrupted power output. When one clutch is engaged, the other clutch is in a disengaged state. In order to realize rapid shifting of gears, there is a pre-engagement strategy. However, in some working conditions, due to the change of the driver's intention, for example, the transmission is in the 5th gear, the pre-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/04F16H63/02F16H63/32
CPCF16H61/0437F16H63/02F16H63/32F16H2063/025
Inventor 罗超文张学勇高海波宋珍珍
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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