Adjustable damping valve with a fail-safe damping force characteristic

US8181757B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Steffen Heyn · Niederwerrn, DE
• Bernd Zeissner · Volkach, DE

Key dates

• Filing date: Sep 28, 2007
• Grant date: May 22, 2012
• Expiry date: Mar 14, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/88054
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An adjustable damping valve including an actuator, which exerts an actuating force on a valve body against the force of a spring to influence the throttle cross section which determines the damping force, where an emergency valve is connected in parallel with the throttle cross section with respect to the flow direction of the damping medium, where the two control surfaces of the valve body move in the axial direction and can thus can come to rest alternately on the two valve seating surfaces, and where the valve body is divided into two parts in the longitudinal direction, and each valve body assembly has its own control surface.