Electromagnetically controllable valve arrangement

US5735582A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Hubert Eith · Schwieberdingen, DE
• Helmut Staib · Schwieberdingen, DE
• Michael Friedow · Tamm, DE
• Martin Scheffel · Leinfelden, DE
• Jurgen Lander · Stuttgart, DE
• Gerhard Stokmaier · Markgröningen, DE
• Hans-Friedrich Schwarz · Rochlitz, DE

Key dates

• Filing date: Aug 16, 1996
• Grant date: Apr 7, 1998
• Expiry date: Aug 16, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87217
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A valve assembly with a housing, a master valve and an auxiliary valve and an armature for the auxiliary valve and an electromagnet is proposed. In previous valve assemblies, in which the auxiliary valve, openable via the armature, serves to open the master valve, a master valve closing element is coupled via an idle stroke arrangement to the armature of the auxiliary valve closing element. If the armature traverses a first partial stroke, then the auxiliary valve is opened; if the armature traverses a further partial stroke, then via the idle stroke arrangement it can lift the master valve closing element from a master valve seat, if hydraulic forces are slight enough. Instead of the idle stroke arrangement, the master valve closing element is given its own armature, which is rigidly joined to the master valve closing element and acts in the opening direction. The valve assembly of the invention can advantageously be used in hydraulic vehicle brake systems that are set up for automatic braking. The smallness and the simplicity, thanks to the solid connection of the master valve closing element to its own armature, are advantageous.