Method for operating a controllable shock absorber for motor vehicles

US10774896B2 · kind B2 · utility

Assignees

• thyssenkrupp Bilstein GmbH · DE
• thyssenkrupp AG · DE

Inventors

• Wolfgang Hamers · Jülich, DE
• Tobias Lenz · Nümbrecht, DE

Key dates

• Filing date: Sep 11, 2015
• Grant date: Sep 15, 2020
• Expiry date: Sep 11, 2035

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F9/3484
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A method for operating a controllable shock absorber may involve damping movement of a valve body by loading the valve body with a back pressure on an outflow side. Further, the controllable shock absorber may include a cylinder tube, a piston within the cylinder tube that divides the cylinder tube into two working spaces and includes a couple fluid leadthroughs connecting the working spaces, and first and second valve assemblies for damping piston movement in first and second actuating directions that are disposed on the leadthroughs. Each valve assembly may have a pilot control chamber and a valve plate that is either seated on or spaced apart from a valve seat in closed and open valve positions. Each valve plate can be prestressed closed by pressure loading the pilot control chamber. The pressures of the pilot control chambers can be set by a pilot control valve that comprises a movable valve body. As a result, an outflow cross section between the pilot control chambers and the working spaces can be set. The valve body may be loaded on an outflow side with a back pressure, as a result of which movement of the valve body is damped.