Adjustable hydraulic vibration damper for motor vehicles

US5392885A · kind A · utility

Assignee

• Fichtel & Sachs · DE

Inventors

• Andree Patzenhauer · Eitorf, DE
• Winfried Geilhausen · Windeck, DE

Key dates

• Filing date: May 17, 1993
• Grant date: Feb 28, 1995
• Expiry date: May 17, 2013

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F2230/183
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An adjustable hydraulic vibration damper for motor vehicles includes a hydraulically and/or pneumatically adjustable control body of a damping valve which guarantees a continuous damping force adjustment, whereby when a control pressure falls below a minimum value, a high damping force is automatically generated. For this purpose, there is a control body for controlling passage of damping fluid through a flow channel, which control body has, on the side opposite the channel, a piston which works together with the control body, whereby a control pressure simultaneously presses against the neighboring end surfaces of the control body and of the control piston to provide a desired amount of damping force for control of the flow of damping fluid through the flow passage.