Abstract: A method and a device for actuating a motor vehicle clutch device (4). A control device (12) automatically influence the frictional power of the clutch device (4) in accordance with predetermined criteria (19) by varying the continuously variable ratio of a vehicle transmission (2).

Abstract: Method and device for controlling a motor vehicle drive train. To reverse the travel direction, the input torque is transmitted with pressure modulation from one clutch (Kv) of one travel direction to one clutch (Kr) of the opposite travel direction. If at the time that a reverse travel direction is selected and the speed of travel exceeds a set maximum value (VR,max), the speed of travel is automatically reduced to the maximum value first by continuous change of the ratio of the transmission (2) of the drive train.

Abstract: The invention concerns a control system for operating a ship's motive installation (1, 2). Via a gearing (4) having adjustable clutches (67, 69) for forward and astern movement, an engine (3) drives a propeller shaft (7). Control and sensor devices (53, 54) are provided. With them the engine speed and the degree of slip of the clutches can be altered. With a control lever (13, 14) of a control post (9) a propeller shaft speed can be adjusted. A control electronics (21) defines the momentary operational condition by freely selecting from three possible operation conditions. The respective operation condition is defined depending on operational parameters to be observed of the engine (3) and/or the gearing (4). The control system is particularly adequate for use within a ship's multi-engine motive installations.