Apparatus and method for learning touch point of engine clutch of hybrid electric vehicle

A method for learning a touch point of an engine clutch of a hybrid electric vehicle including a motor connected to a transmission and an engine selectively connected to the motor through the engine clutch, comprising steps of:

• determining whether a learning condition of the touch point of the engine clutch is satisfied;
• releasing a transmission clutch and controlling a motor speed when the learning condition is satisfied;
• increasing a coupling pressure of the engine clutch when a change amount of the motor speed is less than a first predetermined value;
• comparing a change amount of a motor torque according to the increased coupling pressure of the engine clutch with a second predetermined value;
• and
• learning the touch point of the engine clutch when the change amount of the motor torque is greater than or equal to the second predetermined value,
• wherein when the learning condition is not satisfied after the step of determining, the method repeats the step of determining, and
• wherein the motor speed is controlled as a target input speed of the transmission.