Schaeffler Technologies Ag & Co .Kg

Raphael Künzig

Erhard Hodrus

A method determines the travel of a clutch in a hydraulic clutch-actuation system. A hydraulic signal which extends between a transmitting end and a receiving end is acted upon by an acoustic signal for the generation of a wave packet. The acoustic signal on the transmitting end of the clutch-actuation system is fed into the hydraulic fluid, a wave packet generated by the acoustic signal on the receiving end is reflected back to the transmitting end, a running time of the transmitted and reflected wave packet on the transmitting end is evaluated to determine the coupling travel.

Method and device for determining the travel of a clutch or a gear actuator in a hydraulic clutch actuation system or a hydraulic gear actuation system

A method for actuating a clutch with a clutch actuation system, wherein an axially moveably mounted first piston () arranged on a master-side is moved via an electric motor, and the movement thereof is transmitted via a hydraulic section () to a second piston () positioned on a slave-side, which second piston actuates the clutch (), wherein a path change triggered by the movement is measured and evaluated. In a method, in which a path change can be immediately measured, the path change of the clutch () detected on the slave-side is converted into an acoustic signal, which is transmitted via the hydraulic section () to the master-side for evaluation.

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Rheinstetten, Germany

Raphael Künzig