Vibration damper for motor vehicles having an arrangement for varying damping thereof

US4749069A · kind A · utility

Assignee

• Boge GmbH · DE

Inventors

• Heinz Knecht · Eitorf, DE
• Bernd Moser · Hamm (Sieg), DE

Key dates

• Filing date: Oct 3, 1986
• Grant date: Jun 7, 1988
• Expiry date: Oct 3, 2006

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F9/46
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An arrangement for varying the damping of a suspension component such as a vibration damper, gas spring or hydro-pneumatic suspension. In one embodiment, an electronic system is mounted in association with the cylinder of the suspension component to form a variable damping system which, with the aid of other circuitry, varies the damping system of the piston. A vibration damping system for motor vehicles, in which there is a damping element, which has a work cylinder, is divided into two work chambers by a piston. This cylinder contains a damping medium. There is an electronically-controlled bypass valve disposed parallel to the work cylinder. A desired, variable damping force can thereby be achieved in the decompression and compression stage, between two fixed and specified fundamental curves, by controlling the current sent to an electromagnet. To achieve a damping force at a given piston velocity, the bypass is correspondingly controlled by the electromagnet, by means of a computed pulse width repetition rate.