Method and device for learning engine clutch kiss point of hybrid vehicle

A method for learning an engine clutch kiss point of a hybrid vehicle, comprising the steps of:

• determining, by a controller, whether a kiss point learning condition of an engine clutch which connects an engine with a motor or disconnects the engine from the motor is satisfied;
• controlling, by the controller, a speed of the motor to be maintained at a first speed when the kiss point learning condition is satisfied;
• learning, by the controller, a first kiss point of the engine clutch by engaging the engine clutch so that the motor having the first speed is connected to the engine;
• controlling, by the controller, the speed of the motor to be maintained at a second speed of the motor which is generated after the engine clutch is engaged;
• learning, by the controller, a second kiss point of the engine clutch by engaging the engine clutch so that the motor having the second speed is connected to the engine;
• and
• selecting, by the controller, an average value of the first kiss point and the second kiss point as the engine clutch kiss point when a standard deviation of the first kiss point and the second kiss point is less than or equal to a threshold value.

A device for learning an engine clutch kiss point of a hybrid vehicle, comprising:

• an engine clutch which connects an engine with a motor or disconnects the engine from the motor;
• and
• a controller which determines whether kiss point learning condition of the engine clutch is satisfied,
• wherein the controller controls a speed of the motor to be maintained at a first speed when the kiss point learning condition is satisfied,
• the controller learns a first kiss point of the engine clutch by engaging the engine clutch so that the motor having the first speed is connected to the engine,
• the controller controls the speed of the motor to be maintained at a second speed of the motor which is generated after the engine clutch is engaged,
• the controller learns a second kiss point of the engine clutch by engaging the engine clutch so that the motor having the second speed is connected to the engine, and
• the controller selects an average value of the first kiss point and the second kiss point as the engine clutch kiss point when a standard deviation of the first kiss point and the second kiss point is less than or equal to a threshold value.