Adjustable vibration damper

US5251730A · kind A · utility

Assignee

• Boge GmbH · DE

Inventors

• Norbert Ackermann · Eitorf, DE
• Hubert Beck · Eitorf, DE

Key dates

• Filing date: Jul 17, 1992
• Grant date: Oct 12, 1993
• Expiry date: Jul 17, 2012

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60G2500/104
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An adjustable vibration damper for motor vehicles has a cylinder containing a damping fluid, an axially-movable piston rod projecting into the cylinder in a sealed manner, and a damping piston fastened to the piston rod to divide the cylinder into two work chambers, whereby a damping valve equipped with an axially movable valve body and a valve seat controls the effective cross section of a damping passage. For this purpose, the valve body, starting from its pressurized end surface, has at least one constant throttle cross section running toward the back side of the valve body, and an additional throttle passage running in the outflow direction, whereby a pilot control element for regulating flow through the additional throttle passage is located in a recess inside the valve body.