Fichtel & Sachs Ag

Mannesmann Sachs Ag

Bernd Gaubitz

Hans-Jurgen Schneider

Wolfgang Thieler

Lutz Leimbach

Thomas Wirth

Reiner Voss

Holger Westendorf

Karl-Georg Enk

Gerhard Gasper

Peter Ottenbruch

Walter Fichtler

An adjustment device for automatically operating a vehicle transmission, includes an actuator to operate a gear input part that, depending upon a desired gear, assumes a position corresponding to that gear. An emergency operating device is connected to the actuator for activating a tension element to establish an active connection to the gear input part for the purpose of setting a position of the gear input part corresponding to a selected gear during a failure of the actuator.

Adjustment device for automatically operating a transmission

A method for operating a motor vehicle driven by an internal combustion engine, and having a drive train for receiving mechanical power of the engine and imparting motion to the motor vehicle via at least one set of wheels of the motor vehicle, can include a system for engaging and disengaging at least a part of the drive train. This system for engaging and disengaging can be utilized for preventing the motor vehicle from being driven under its own power.

Method of operating a motor vehicle and the motor vehicle drive

For emergency operation of an automatic friction clutch (3) of a truck which is operated during normal running by an electronic controller (9) via an electric motor driven actuator (11) and a hydraulic system (19, 21, 23), it is proposed that the clutch be controlled manually via a compressed air actuator (29), in particular via a compressed air servo actuator, by means of a changeover valve (39) which connects the compressed air actuator (29) alternately to a compressed air source (37) or via a flow throttle (41) to the atmosphere.

Arrangement for operating a friction clutch of a motor vehicle, in

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Niederwerrn, Germany

Bernd Gaubitz