Method for setting a predefined position of a clutch actuator which comprises a friction spring element

A method of controlling a clutch comprising:

• in an initialization phase, moving a clutch actuator to a predefined clutch closed position, switching off the clutch actuator, measuring a first turning back value, and storing the first turning back value in a non-volatile memory;
• and
• in an application phase, in response to a command to close the clutch, moving the clutch actuator past the predefined clutch closed position by an amount equal to the stored first turning back value and then switching off the clutch actuator.

A method of controlling a clutch comprising:

• in an initialization phase, moving a clutch actuator to a predefined clutch open position, switching off the clutch actuator, measuring a turning back value, and storing the turning back value in a non-volatile memory;
• and
• in an application phase, in response to a command to open the clutch, moving the clutch actuator past the predefined clutch open position by an amount equal to the stored turning back value and then switching off the clutch actuator.

A method for setting a predefined position of a clutch actuator comprising a friction spring element, in which an activation path of the clutch actuator that actuates the clutch is predefined by a coupling torque via a coupling characteristic curve, wherein the predefined position to be assumed by the clutch actuator is set by a closed-loop controller, wherein the predefined position is corrected by a turning back value of the friction spring element and the corrected position of the clutch actuator is approached by the closed-loop controller, wherein after reaching the corrected position the closed-loop controller for setting the predefined position is switched off by dissipating the potential energy stored in the friction spring element, wherein the friction spring element is a wrap spring.