Actuating device for the actuation, in particular pneumatic actuation of a friction clutch

US6196369A · kind A · utility

Assignee

• Mannesmann Sachs AG · DE

Inventors

• Jorg Willert · Schweinfurt, DE
• Joachim Lindner · Schweinfurt, DE

Key dates

• Filing date: Jan 7, 1999
• Grant date: Mar 6, 2001
• Expiry date: Jan 7, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2048/0221
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An actuating device for a friction clutch arranged in the drive train of an automobile between an internal combustion engine and a gear in a casing bell. The actuating device includes a disengagement bearing arrangement and a positioning servo arrangement, having a pressure-medium power cylinder arrangement, for the disengagement bearing arrangement, the positioning servo arrangement having a control valve connected to a pressure-medium source. The control valve includes a valve arrangement which can be changed over between at least two control states as a function of an actual value representing the axial position of the disengagement bearing arrangement and of a command variable representing a desired position of the disengagement bearing arrangement. In a first controlled state, there is a pressure-medium connection between the pressure-medium power cylinder arrangement and the pressure-medium source, and, in a second control state, there is a pressure-medium connection between the pressure-medium power cylinder arrangement and a pressure equalizing orifice. The valve arrangement includes two valve elements movable relative to one another and relative to a valve housing. The com…