Patent ID: 7522984

Claim:
A method for determining a point of engagement of a clutch operable via an actuating device, the actuating device having a positioning motor which is electrically drivable via a control unit, the output of the positioning motor providing a motor torque and a motor speed, the motor being operationally linked to an actuating mechanism which actuates the clutch, the method comprising: at least one of detecting a rotational angle position at a motor output side and deriving a quantity therefrom, wherein the positioning motor is arbitrarily actuated by the control unit for determining a point of engagement so that the clutch is engaged; and performing, when a predeterminable rotational angle position of the positioning motor or the quantity derived therefrom is attained, at least one of the following: in a first operating mode, applying a constant voltage to the positioning motor by the control unit and, at the same time, detecting the motor speed as a function of the rotational angle position, and in a second operating mode, applying by the control unit a constant current to the positioning motor and detecting motor speed as a function of the rotational angle position; and determining the point of engagement from detected values of the motor speed that are a function of the rotational angle position.