Servo valve arrangement

US5644967A · kind A · utility

Assignee

• Mercedes-Benz Group AG · DE

Inventors

• Wolfgang Joerg · Stuttgart, DE
• Jaromir Bordovsky · Winnenden, DE
• Aydogan Cakmaz · Stuttgart, DE
• Hubert Heck · Goldkronach, DE
• Arno Roehringer · Ditzingen, DE
• Claus Gall · Fellbach, DE
• Reinhold Abt · Bad Liebenzell, DE
• Rainer Strauss · Kaarst, DE
• Karl-Hans Koehler · Wernau, DE

Key dates

• Filing date: Jun 28, 1995
• Grant date: Jul 8, 1997
• Expiry date: Jun 28, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B62D5/08
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A servo valve arrangement with a high-pressure, low-pressure and motor connection and with a pressure control valve arranged between the high-pressure connection and motor connection and a return control valve arranged between the motor connection and low-pressure connection is provided. The pressure control valve normally is closed and the return control valve normally is open. The pressure control valve can be opened by a common actuating member whilst closing the return control valve. The valve arrangement is suitable, in particular, for hydraulic power steering systems of motor vehicles with a so-called closed center.