Electromagnetically actuated valve for slip-controlled hydraulic brake systems in motor vehicles

US5836334A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Norbert Mittwollen · Markgröningen, DE
• Wolfgang Maisch · Schwieberdingen, DE
• Martin Oehler · Leingarten, DE
• Guenther Hohl · Stuttgart, DE
• Hans-Peter Huebner · Stuttgart, DE

Key dates

• Filing date: Jan 27, 1997
• Grant date: Nov 17, 1998
• Expiry date: Jan 27, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/0318
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An electromagnetically operated valve which attains an automatic establishment of a reduced flow cross section that is effective after a closing position of the valve. The valve has a magnet armature, longitudinally movable in a valve dome, with a valve tappet for actuation of a seat valve. The seat valve is located in a valve chamber from which pressure fluid conduits, leads to upper and lower face ends of the circumferentially sealed off magnet armature. When the valve is opening from the closing position, an additional force acting in the closing direction upon the magnet armature is generated because of the shaping of the seat valve, and as a result of this additional force the seat valve assumes a partly closed position that is different from its position of repose. The valve is applicable particularly to traction-controlled hydraulic brake systems of motor vehicles.