Controllable vibration damper for motor vehicles

US5375683A · kind A · utility

Assignees

• August Bilstein GmbH & Co. KG · DE
• Mercedes-Benz Group AG · DE

Inventors

• Zhen Huang · Longbeilingcun, CN
• Hans-Joachim Betsch · Kamen, DE
• Hans Scheerer · Eßlingen, DE
• Andreas Opara · Fellbach, DE
• Walter Schulz · Stuttgart, DE
• Klaus Schmidt · Eibelstadt, DE

Key dates

• Filing date: Dec 9, 1993
• Grant date: Dec 27, 1994
• Expiry date: Dec 9, 2013

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60G2500/20
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A variable dashpot for motor vehicles. It comprises a vibration-suppressing piston-and-cylinder mechanism. The cylinder contains displacement fluid. The piston divides the cylinder into two displacement compartments. The piston has a piston rod attached to it. The piston is provided with pressure-dependent valves that vary the level of vibration suppression. The vibration-suppression valve system has two vibration-suppressing valves (2) accommodated in alignment in a cylindrical valve housing (1). Each vibration-suppressing valve consists of an axially displaced electromagnetic plunger (5 or 6) that operates in conjunction with at least one outlet (3 or 4) and of at least one pressure-sensitive valve (7 or 8) on stream parallel or in alignment with the plunger.