Magnetic valve for a traction-controlled hydraulic brake system for motor vehicles

US5810330A · 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
• Juergen Lander · Stuttgart, DE
• Gerhard Stokmaier · Markgröningen, DE

Key dates

• Filing date: Aug 22, 1996
• Grant date: Sep 22, 1998
• Expiry date: Aug 22, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/86944
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A magnetic valve that switches at high differential pressures and furnishes a large flow cross section. The magnetic valve has an armature, which when current is supplied to a coil is movable toward a pole core counter to the force of a restoring spring. The armature is capable of opening an auxiliary valve of small sealing diameter directly and a main valve of large sealing diameter indirectly. The auxiliary valve and the main valve have a common closing body, which is movable relative to the armature with a limited stroke. The auxiliary valve communicates through a bore of the closing body with the outflow side of the magnetic valve. In the open position of the magnetic valve, the closing body is held in a position that blocks the auxiliary valve by the action of the second restoring spring. The magnetic valve is suitable in particular for slip-controlled hydraulic brake systems of motor vehicles.