Hydraulic vibration damper having adjustable damping valve

US4749070A · kind A · utility

Assignee

• Boge GmbH · DE

Inventors

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

Key dates

• Filing date: Feb 13, 1987
• Grant date: Jun 7, 1988
• Expiry date: Feb 13, 2007

Classification

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

Abstract

An adjustable damping valve for use on a hydraulic vibration damper, gas pressure damper or hydropneumatic suspension, which regulates the damping force, regardless of the orientation, and is variable in the regulation of the throughput, thereby providing a rapid switching frequency response. The damping valve has at least one electromagnet. In the preferred embodiment, each electromagnet can be controlled individually. Further, each electromagnet has a coil body with a winding and an armature. The armature is immersed in a fluid in the flow connection during operation. The armatures of the electromagnets interrupt and open directly the flow connection variably and quickly between an upper damping chamber of the vibration damper and a pressure equalization chamber. In one embodiment, there are a number of individual flow connections with corresponding electromagnets distributed over the circumference for fast action.