Patent ID: 8187144

Claim:
A clutch torque control system of a hybrid electric vehicle, the system comprising: a power generation system including: at least one motor-generator connected to a power transmission system, a first rotational speed detecting means thereof, and a controller, the first rotational speed detecting means configured to detect the rotational speed of the at least one motor-generator; an engine connected to a second rotational speed detecting means, and a second controller, the second rotational speed detecting means configured to detect rotational speed of the engine; and a clutch for performing connection and disconnection between the motor-generator and the engine, wherein, when the clutch is engaged in a half-clutch state during acceleration of the vehicle, an output torque of the engine is controlled so that the rotational speed of the engine is determined as a value within a predetermined range of values, wherein controlling the engine speed to the value within the predetermined range of values provides the engine with a sufficient torque to allow for smooth acceleration, and wherein the engine rotational speed is controlled so that a minimum amplitude value of the engine rotational speed is determined to exceed the detected motor-generator rotational speed.