Clutch position automatic learning method, system and hybrid vehicle

Abstract

The invention provides a clutch position automatic learning method. The clutch position automatic learning method comprises the following steps that according to the current state of a hybrid vehicle,a controller judges whether the clutch position automatic learning condition is met or not; and if the clutch position automatic learning condition is met, a clutch enters the automatic learning state; when the clutch enters the automatic learning state, if the controller sends out a command of shifting a hybrid power mode to a pure electric mode, learning of the maximum separation point of the clutch is performed, and if the controller sends out a command of shifting the pure electric mode to the hybrid power mode, learning of the minimum combination point of the clutch is performed; and ifthe controller sends out a command that a motor reversely towing an engine is started, learning of sliding friction point of the clutch is performed. The invention also provides a clutch position automatic learning system as well as a hybrid vehicle. The clutch position automatic learning method can complete clutch position automatic learning in a real-time manner in the normal operation of the vehicle, so that the real-time adjustment of the position of the clutch is realized, and the control accuracy of the clutch is improved.

Description

technical field [0001] The invention relates to the technical field of hybrid vehicle clutches, in particular to a hybrid vehicle clutch position automatic learning method, system and hybrid vehicle. Background technique [0002] During the use of a hybrid vehicle, as the number of clutch disengagement and engagement increases, the clutch friction plate will gradually wear out, resulting in changes in the key positions of the clutch, such as changes in the positions of the maximum separation point, the minimum engagement point, and the slipping point , resulting in the failure of the clutch to engage or disengage normally, affecting the normal transmission of torque and the comfort of the vehicle during normal driving. [0003] At present, there are mainly two methods for learning the clutch position of hybrid electric vehicles. One is to obtain the key position data of the clutch through electronic control calibration, and then write the data to the controller. This method...

AI Technical Summary

Problems solved by technology

This method requires the driver to perform the clutch learning operation through the switch at regular intervals. Although the operation is simple, the vehicle must be at a standstill when the clutch learning is performed, and it cannot be carried out during driving. Before the driver performs the next clutch learning operation, the clutch position cannot be learned, so that the real-time correction of the clutch position cannot be realized

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