Patent Number: 6,167,995

Title: Release mechanism for a motor vehicle friction clutch

Abstract: A release mechanism for a motor vehicle friction clutch for cooperation with a motor vehicle transmission having subdivided switching steps. The mechanism includes a release member displaceable by a compressed air for carrying out a clutch release process, a valve arrangement for selectively supplying the compressed air, and a measurement arrangement for detecting an actual release position of the release member. The valve arrangement carries out the application of pressure fluid to the release member in accordance with (1) a reference variable provided by an actuation arrangement and which represents a reference release position of the release member, and (2) the detected actual release position. The measurement arrangement is so constructed that when the detected actual release position exceeds a predetermined switching threshold release position, a shifting signal is provided for shifting the transmission in subdivided switching steps.

Inventors: Lindner; Joachim (Hambach, DE)

Assignee: Mannesmann Sachs AG

International Classification: F16D 25/08 (20060101); F16D 48/00 (20060101); F16D 48/02 (20060101); B60K 041/22 (); F16D 025/08 ()

Expiration Date: 01/02/2018