Patent · US Active

Hydropneumatic suspension with load-dependent damping control

US8087646B2 · kind B2 · utility

0Cited by

14References

12Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Holger Kirchner · Ruppichteroth, DE
Norbert Ackermann · Eitorf, DE

Key dates

Filing date	Mar 2, 2006
Grant date	Jan 3, 2012
Priority date	—
Expiry date	Nov 28, 2028

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16F9/5123
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A piston-cylinder unit for installing between a vehicle body and an axle includes a cylinder filled with damping medium, a piston dividing the cylinder into working spaces, and a piston rod. A first damping valve assembly in the piston damps movement of the piston in tension and in compression. A load dependent valve includes a valve body which can be moved axially by pressure in the damping medium, the valve body having axially opposed first and second actuation surfaces. The first actuation surface is exposed to pressure of a first accumulator, which is connected to one of the working spaces, and the second actuation surface is exposed to pressure of a second accumulator.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.