Abstract: A method of controlling an automated friction clutch arranged as a starting and shifting clutch in a vehicle between an engine driveshaft and an input shaft of a transmission. The clutch can be engaged passively by a contact pressure spring and disengaged and engaged by a pneumatic control cylinder. The air inlet and outlet valves are opened in a sustained-pulse operating mode, over a duration ?tV calculated as the quotient of air mass difference ?mK between the nominal mass mK—soll present in the pressure chamber of the control cylinder when the control piston is in its nominal position xK—soll and the actual air mass mK—ist present when the control piston is in its actual position xK—ist (?mK=mK—soll?mK—ist) and air mass flow mv passing through the control valve concerned, which depends on the existing pressure situation and the flow characteristics of the open inlet or air outlet valve (?tV=?mK/mv).

Abstract: A method of controlling an automated friction clutch arranged as a starting and shifting clutch in a vehicle between an engine driveshaft and an input shaft of a transmission. The clutch can be engaged passively by a contact pressure spring and disengaged and engaged by a pneumatic control cylinder. The air inlet and outlet valves are opened in a sustained-pulse operating mode, over a duration ?tV calculated as the quotient of air mass difference ?mK between the nominal mass mK—soll present in the pressure chamber of the control cylinder when the control piston is in its nominal position xK—soll and the actual air mass mK—ist present when the control piston is in its actual position xK—ist (?mK=mK—soll?mK—ist) and air mass flow mv passing through the control valve concerned, which depends on the existing pressure situation and the flow characteristics of the open inlet or air outlet valve (?tV=?mK/mv).