Hydraulic adjustable shock absorber

US4850460A · kind A · utility

Assignee

• Boge GmbH · DE

Inventors

• Heinz Knecht · Eitorf, DE
• Alfred Preukschat · Rübhausen, DE

Key dates

• Filing date: Apr 1, 1988
• Grant date: Jul 25, 1989
• Expiry date: Apr 1, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7761
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Shock absorber for vehicles, in which there is a damping element, which has a work cylinder holding a damping medium and divided into two work chambers by a piston, whereby at least partly to control the damping force, an electromagnetically activated and axially moving valve body of a valve pressurizes a flow passage. A variable damping adjustment becomes possible, and by means of a variably controlled damping valve, any desired adjustable damping of the decompression and compression stage can be achieved. In addition, by varying the effective hydraulically-influenced functional surfaces of the valve body, the switching, frequency, closing and opening action of the valve body, designed as the armature of an electromagnet, can be influenced. A seat surface is oriented together with the end surface of the valve body, whereby at least a portion of the end surface of the valve body and of the valve seat are located at a distance from one another. Varying the effective hydraulically-influenced functional surfaces of the valve body, the switching, frequency, closing and opening action of the valve body, can be influenced. This configuration makes is possible to achieve a partial pressur…