Abstract: The friction clutch between the engine and an automated transmission in the power train of a motor vehicle are operated and controlled by an actuator which effects changes in the extent of engagement of the clutch as well as the selection of and shifting into particular gears. The actuator forms part of a unit which receives a pressurized hydraulic fluid from a source including an accumulator and a proportional valve which latter selects the fluid pressure necessary to shift the transmission into a selected gear.

Abstract: Torque which is being transmitted by a clutch in the power train of a motor vehicle is regulated in response to processed signals from a control unit which receives signals denoting the driver's desire concerning the acceleration of the vehicle as well as numerous other variables including the position of the gas pedal, the RPM of the engine, the input and/or the output RPM of the transmission and others. The regulation is planned in such a way that the vehicle undergoes a higher than standard acceleration at the desired rate and that the thermal stressing of the clutch is minimized.