Method and system for controlling engine clutch of P2 type parallel hybrid vehicle

A system for controlling an engine clutch of a P2 type parallel hybrid vehicle in which an engine, a motor, and a transmission are arranged in a row and in which an engine clutch is mounted between the engine and the motor, the system comprising:

• a clutch actuator providing a hydraulic pressure necessary to drive the engine clutch;
• a torque measurement unit measuring a torque of the engine;
• an oil temperature measurement unit measuring an oil temperature inside the engine clutch;
• and
• a controller computing a target hydraulic pressure to be applied to the engine clutch from pieces of information provided by the engine torque measurement unit and the oil temperature measurement unit and controlling operation of the clutch actuator based on the computed target hydraulic pressure,
• wherein the controller derives a learning hydraulic value for suppressing slip, through learning and stores the derived learning hydraulic value, when a kickdown shift occurs during performance of variable hydraulic control of the engine clutch and when the slip having a predetermined value or above occurs in the engine clutch, and the controller computes a final hydraulic pressure by adding a hydraulic compensation value, obtained by multiplying the learning hydraulic value by a compensation factor, to a target hydraulic pressure, when the same kickdown shift situation occurs during the performance of the next time variable hydraulic control of the engine clutch, and controls the engine clutch using the computed final hydraulic pressure.