Automatic transmission clutch control method
A technology of clutch control and automatic transmission, which is applied in transmission control, components with teeth, belts/chains/gears, etc. It can solve problems such as no clutch position sensor for clutches, unstable position of clutch linkage points, and increased fuel consumption of vehicles. , to achieve the effects of reducing wear, reducing aging speed and reducing fuel consumption
Active Publication Date: 2016-06-29
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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Problems solved by technology
The clutch linkage point detection has an important impact on the quick response of the vehicle start. If the clutch linkage point detection is inaccurate, it will cause severe clutch wear, increased fuel consumption of the vehicle, and shocks at the start of the vehicle.
[0003] The automatic transmission clutch does not have a clutch position sensor, so the clutch linkage point cannot be detected directly
In addition, due to factors such as the wear and tear of the clutch of the automatic transmission, the position of the clutch linkage point is not fixed, and the oil filling pressure of the clutch will also change. Therefore, the detection and adaptive adjustment of the clutch linkage point of the automatic transmission clutch need to be solved urgently.
Method used
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[0036] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0037] During the working process of the vehicle clutch, the clutch completes three oil filling processes: the clutch is pre-filled with oil, so that the control oil circuit of the clutch is filled with oil when the clutch is in the pre-filled state, and the active part and the driven part are not in contact; the second charge After the brake is released, the clutch is filled with oil for the third time, so that the clutch completes the engagement process and starts to transmit the engine torque. In the present invention, it is necessary to control the clutch from the non-linked state to the linked point, so it is necessary to control the clutch pre-fill pressure value and the second oil-fill pressure value.
[0038] In the case that the clutch is not worn, the acquisition and calibration of the following parameters can be carried out first, ...
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The invention discloses an automatic transmission clutch control method for controlling a state of a clutch reaching a linkage point. The automatic transmission clutch control method comprises the steps of pre-filling the clutch according to a pre-filling oil pressure value and performing secondary oil filling of the clutch with pre-filled oil to enable the clutch to be in a linkage point state. In the secondary oil filling process, clutch pressure serves as a controlled variable so that the clutch pressure increases a fixed clutch pressure added value, or clutch oil filling time serves as the controlled variable so that oil filling of the clutch is performed in fixed time duration.
Description
technical field [0001] The invention relates to the technical field of vehicle automatic control, in particular to an automatic transmission clutch control method. Background technique [0002] The linkage point of the clutch is the position where the driving part and the driven part are just in contact after the clutch overcomes the idle travel, but the torque has not been transmitted or the torque is very small (the torque is not enough to overcome the driving resistance of the vehicle to drive the vehicle), at this time The driving and driven parts of the clutch create sliding friction. Before the vehicle is running, if the clutch is controlled at the linkage point, when the brake is released, the vehicle can start quickly, reducing the response time of the vehicle. The clutch linkage point detection has an important influence on the quick response of the vehicle starting. If the clutch linkage point detection is inaccurate, it will cause serious clutch wear, increased f...
Claims
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IPC IPC(8): F16H61/04
Inventor 张俊祥陈勇罗大国刘文忠李俊茂赵福全
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD