Controllable vibration damper for motor vehicles

US6119831A · kind A · utility

Assignee

• Mannesmann Sachs AG · DE

Inventors

• Heinz Knecht · Eitorf, DE
• Norbert Ackermann · Eitorf, DE

Key dates

• Filing date: Jul 8, 1998
• Grant date: Sep 19, 2000
• Expiry date: Jul 8, 2018

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F9/465
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A controllable vibration damper for motor vehicles, having a cylinder containing damping fluid, a piston rod entering the cylinder in a sealed manner and arranged axially displaceably therein, and a damping piston which is fastened to the piston rod and divides the cylinder into two working spaces, as well as a damping valve, which is provided with a valve seat and controls the effective cross section of a damping passage of the main stage via an axially displaceable valve body, the valve body being acted on in one direction by a precontrolling device and activated directly in the opposite direction.