Patent ID: 6896112

Claim:
A clutch-actuating device for a clutch in a motor vehicle power train, wherein the power train includes an engine, a clutch, a transmission, and a control unit; said clutch actuating device comprising an actuator motor driving an actuating member, and further comprising a transfer mechanism operable to transmit a movement of the actuating member to a clutch release element that is movable against an opposing force of a clutch spring to displace the clutch from a closed position to an open position, wherein the transfer mechanism has a first movement range in which said movement of the actuating member in an opening direction of the clutch does not displace the clutch from its closed position, and a second movement range in which the movement of the actuating member causes a displacement of the clutch, wherein the transfer mechanism has an interval of loose play, and wherein said loose play is used up within the first range, the device further including a compensation spring mechanism which introduces a first force/displacement characteristic into the movement of the actuating member within the first range, wherein the displacement of the clutch in the second range follows a clutch displacement characteristic, and wherein in said second range said clutch characteristic is superimposed on said first force/displacement characteristic.