Piston-cylinder unit installed between a vehicle body and wheel guide part

US6032961A · kind A · utility

Assignee

• Mannesmann Sachs AG · DE

Inventors

• Robert Pradel · Schweinfurt, DE
• Gerald Fenn · Pfersdorf, DE

Key dates

• Filing date: Jul 20, 1998
• Grant date: Mar 7, 2000
• Expiry date: Jul 20, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60G2800/012
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A piston-cylinder unit for a hydropneumatic suspension system of a vehicle having a fluid-filled cylinder in which a piston having damping valves and connected to a piston rod is axially movable. The piston rod runs axially in a piston rod guide at the piston-rod exit of the cylinder and is sealed toward the outside by means of a piston rod seal. A spring surrounding the piston rod is in mounted between a first support part attached to the cylinder and a second support part attached to either the piston rod or a vehicle-fixed part. The spring, which interacts with an axially adjustable support part, can be lifted off one of the support parts. During compression of the piston-cylinder unit, the first and second support parts begin compression of the spring at the functional point of the compression. The functional point is adjustable in a predetermined position range by an adjustment device.