Patent ID: 8565989

Claim:
A method of adjusting characteristic data of a clutch for a hybrid electric vehicle, the method comprising: estimating a clutch transmitting torque by a first clutch transmitting torque estimating logic embedded in a clutch control means, when ignition is ON, after confirming a vehicle is in a state of braking and a transmission is configured to transmit power from an input to driven wheels; checking an error between the clutch transmitting torque estimated by the first clutch transmitting torque estimating logic embedded in the clutch control means, and clutch characteristic data obtained from characteristic maps of clutch transmitting torque for control; terminating further procedures in case where the error is within a predetermined range; estimating a clutch transmitting torque by a second clutch transmitting torque estimating logic embedded in the clutch control means in case where the error exceeds the predetermined range, the second clutch transmitting torque estimating logic embedded in the clutch control means being configured to estimate a clutch transmitting torque based on torque of a motor-generator; and adjusting the clutch characteristic data in accordance with the clutch transmitting torque estimated by the second clutch transmitting torque estimating logic embedded in the clutch control means, wherein adjusting the characteristic data further includes: idle rotating an engine by transmitting power from the motor-generator with the clutch in a half-clutch state where an output to the transmission is blocked and the engine is in a fuel cut state; estimating a clutch transmitting torque based on the torque of the motor generator when rotating speeds of the engine and the motor-generator becomes constant; and adjusting the characteristics of the clutch based on the estimated clutch transmitting torque.