Control method and system for auxiliary gear engaging of wet-type double-clutch synchronizer and automobile
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A wet dual clutch and control method technology, applied in the field of clutches, can solve problems such as easy generation of noise, and achieve the effects of reducing gear shifting noise and improving comfort.
Pending Publication Date: 2022-08-02
CHONGQING CHANGAN AUTOMOBILE CO LTD
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[0003] One of the purposes of the present invention is to provide a control method for auxiliary shifting of a wet double clutch synchronizer to solve the problem of easy noise generation in shifting in the prior art; the second purpose is to provide a wet dual clutch synchronizer auxiliary A control system for putting into gear; the third purpose is to provide a vehicle
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Embodiment 1
[0031] This embodiment proposes a control method for auxiliary gear shifting of a wet dual-clutch synchronizer, such as figure 1 and figure 2 As shown, the method is specifically as follows: before the method is implemented, the odd-numbered shaft clutch speed n is collected by the electronic control unit 1 , even-numbered shaft clutch speed n 2 , 1st gear shift fork displacement L 1 , 2-gear fork displacement L 2 , 3-speed fork displacement L 3 , 4-speed fork displacement L 4 , 5-speed fork displacement L 5 , 6-speed fork displacement L 6 , 7-speed fork displacement L 7 , R shift fork displacement L R , 1st gear moment of inertia J 1 , 2nd gear moment of inertia J 2 , 3rd gear moment of inertia J 3 , 4th gear moment of inertia J 4 , 5th gear moment of inertia J 5 , 6th gear moment of inertia J 6 , 7th gear moment of inertia J 7 , R gear moment of inertia J R , 1st gear ratio g 1 , 2nd gear ratio g 2 , 3rd gear ratio g 3 , 4th gear ratio g 4 , 5th gear rat...
Embodiment 2
[0039] This embodiment proposes a control system for auxiliary gear shifting of a wet dual-clutch synchronizer, based on the control method for auxiliary shifting of a wet dual-clutch synchronizer described in Embodiment 1, as figure 2 shown.
[0040] It includes an electronic control unit 1 , a first auxiliary gear state determination mechanism 2 , a second auxiliary gear state determination mechanism 3 and a target gear determination mechanism 4 .
[0041] The first auxiliary gear state determination mechanism 2 is configured to determine whether the auxiliary gear changes from the in-gear state to the out-of-gear state. If so, the electronic control unit 1 controls the auxiliary gear to enter the off-gear state; if not, it determines whether the displacement of the fork of the auxiliary gear is greater than or equal to the preset maximum displacement; If not, it is determined whether the time for the auxiliary gear fork to maintain the in-gear state is greater than or equ...
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Abstract
The invention relates to a control method and system for auxiliary gear engaging of a wet-type double-clutch synchronizer and an automobile. The method specifically comprises the steps that S1, rotational inertia of all gears is obtained, whether the rotational inertia of a target gear is minimum or not is judged, if yes, gear engaging is conducted towards the target gear, and the process is ended, and if not, the step S2 is executed; s2, enabling an auxiliary gear shifting fork to enter a gear engaging state; s3, the auxiliary gear is made to enter a gear taking-off state, and an auxiliary gear shifting fork is made to be located in a neutral gear area; and S4, the target gear is made to enter the gear engaging state till the target gear shifting fork moves to the in-gear position till gear engaging of the target gear shifting fork is completed. According to the method, when the low gear is engaged in a static state, the idle high gear can be used for engaging the gear, the rotating speed of the target gear clutch is reduced, and then the low gear is engaged, so that the gear engaging is completed by using small gear engaging force, the gear engaging noise is reduced, and the comfort of the whole vehicle is improved.
Description
technical field [0001] The invention relates to the technical field of automobile engineering, in particular to clutch technology. Background technique [0002] The wet dual clutch has two clutches, the clutches transmit torque through friction plates, one clutch is connected to the input shaft of the odd-numbered gears of the transmission, and the other is connected to the input shaft of the even-numbered gears of the transmission. Driven by the electronic control unit and the hydraulic system, the clutch transmission fork can be picked up and shifted, and the clutch can be switched, so as to realize the power output without interruption. However, when the transmission is in static gear, due to the drag of the wet dual clutch, when the clutch drag speed is high, and the static gear is generally in a low gear (such as 1st gear, 2nd gear, R gear), the low gear The moment of inertia is large and the synchronous speed difference is large at this time. In order to ensure the su...
Claims
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Application Information
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