Patent ID: 9233684
Filing Date: 2016-01-12
CPC Classification: B60W,B60Y,F16D,F16H,Y02T

Claim Text:
1. A method of learning a torque transmission kiss point of an engine clutch of a hybrid electric vehicle, in which a point at which the engine clutch of the hybrid electric vehicle driven by output of an engine and a motor, which are connected or separated through the engine clutch, starts to transmit torque is learned and controlled, the method comprising: determining, by a control unit, whether power transference of a transmission transmitting the output from the engine and the motor has been interrupted; determining, by the control unit, whether the engine is on only when the power transference of the transmission has been interrupted; controlling, by the control unit, the motor so that a speed of the motor is maintained at a set speed different from a speed of the engine only when the power transference of the transmission has been interrupted and the engine is on; detecting, by the control unit, a state change of the motor while increasing hydraulic pressure applied to the engine clutch at a set ratio; calculating, by the control unit, a torque transmission kiss point of the engine clutch based on the state change of the motor; and applying the torque transmission kiss point of the engine clutch to a solenoid valve, wherein the transmission is an automatic transmission, and when the transmission is in park or neutral, the control unit determines that power transference from the transmission has been interrupted.