Trigger method and device for self-learning of clutch half-joint point, dual-clutch automatic transmission

Abstract

The invention discloses a clutch half-engaging-point self-learning trigger method and device and a dual clutch type automatic transmission. The method comprises the following steps of detecting the clutch state; when the clutch state is turned to be in the closing state from the disengaging state, starting to detect rotating speed values of an input shaft of a gearbox at different times; and whenthe difference value between any rotating speed peak value of the input shaft of the gearbox and the adjacent rotating speed valley value exceeds the preset rotating speed value, and the time difference between the rotating speed peak value and the adjacent rotating speed peak value is smaller than the preset duration, triggering clutch half-engaging-point self-learning. Through the scheme, the opportunity for freshening clutch half-engaging-point self-learning can be added, the probability of shaking and noise generated by the input shaft of the gearbox can be reduced, and the vehicle drivingand taking comfort is improved.

Description

technical field [0001] The invention relates to the technical field of automobile transmission, in particular to a triggering method and device for self-learning of a clutch half-joint point, and a dual-clutch automatic transmission. Background technique [0002] At present, dual-clutch automatic transmissions are widely used. In the control of dual-clutch automatic transmissions, the accuracy of the joint position where the clutch starts to transmit torque is very important. This joint position is also called the half joint point of the clutch. Specifically, if the position of the half-joint point is deeper than the exact value, when the clutch eliminates the gap between the clutch plates and starts to transmit torque, it will cause overshooting of the clutch control, resulting in backlash impact impact, and increase the amplitude of the speed change of the gearbox input shaft. Large; while the half-engagement point is shallower than the exact value, when the clutch elimina...

AI Technical Summary

Problems solved by technology

[0004] However, in specific applications, since the degree of wear of the clutch is also affected by other factors, such as the driver's shifting style, it is easy to cause Insufficient self-learning opportunities increase the probability of vibration and noise generated by the gearbox input shaft, which affects driving comfort

[0005] Further, the above-mentioned problems are particularly serious in dry dual-clutch automatic transmissions

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