Hydropneumatic vibration damper of variable damping force

US6135250A · kind A · utility

Assignee

• Mannesmann Sachs AG · DE

Inventors

• Andreas Forster · Schweinfurt, DE
• Georg Memmel · Hamm (Sieg), DE

Key dates

• Filing date: May 27, 1998
• Grant date: Oct 24, 2000
• Expiry date: May 27, 2018

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F9/325
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Disclosed is a hydropneumatic vibration damper of variable damping force, with a cylinder which is arranged between a piston rod guide and a bottom valve and in which a piston provided with at least one valve and connected to a piston rod subdivides the cylinder interior filled with damping fluid into a working space located on the piston rod side and a lower working space. A container surrounds the cylinder at a radial distance, thereby forming a compensating space which is filled with damping fluid and gas, while the lower working space can be connected hydraulically to the compensating space via a bottom valve and an electromagnetically actuable valve device is provided between the interior of the cylinder and the compensating space. The entire electromagnetically actuable valve device, taking effect between the interior of the cylinder, preferably the working space located on the piston rod side, and the compensating space, is arranged on that side of the bottom valve which is opposite the cylinder.