Patent ID: 7222708

Claim:
A clutch actuator for actuating a clutch arranged between a drive engine and a transmission of a vehicle, the clutch actuator comprising: a cylinder-piston unit having a piston that includes a piston rod forming a linearly actuable pin, the piston being actuated by a pressure medium and the pin being oriented substantially in a plane perpendicular with respect to a center axis of the clutch; a gear mechanism having a rotary element operatively configured to convert rotational movement of the rotary element into a linear movement of a clutch operator that is arranged coaxially with respect to the center axis of the clutch, wherein the pin is coupled eccentrically to the rotary element; wherein an initial position of the clutch operator prevailing at a beginning of a clutch actuation is settable as a function of a wear of the clutch by a preceding work stroke of the pin, which work stroke comprises a clutch actuation stroke and a wear tracking stroke; wherein a control unit actuates the clutch actuator in each case separately for a larger work stroke of the pin which comprises the wear tracking stroke and the clutch actuation stroke and for a smaller work stroke of the pin which comprises only the clutch actuation stroke; and wherein a sensor is provided for detecting a current clutch wear directly or indirectly and for supplying a corresponding signal to the control unit.