Actuation device

US6298969A · kind A · utility

Assignee

• Mannesmann Sachs AG · DE

Inventors

• Franz Nagler · Ottendorf, DE
• Thomas Otto · Würzburg, DE

Key dates

• Filing date: Nov 19, 1999
• Grant date: Oct 9, 2001
• Expiry date: Nov 19, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2500/70668
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An actuation device for a friction clutch arranged in the drive train of a motor vehicle includes an engagement/disengagement arrangement having a pressure fluid cylinder and a pressure fluid piston axially displaceably arranged therein. The engagement/disengagement arrangement is operatively connected to a pressure fluid source via a control valve which is actuatable as a function of a first control parameter representing a required value and a second control parameter representing an actual value of the axial position of the pressure fluid piston. The control valve being actuated by an electromagnetic positioning device.