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

US5476243A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Martin Oehler · Leingarten, DE
• Guenther Hohl · Stuttgart, DE
• Norbert Mittelwollen · Markgröningen, DE
• Hans-Juergen Herderich · Weingarten, DE
• Stephan Jonas · Gerlingen, DE

Key dates

• Filing date: Oct 12, 1994
• Grant date: Dec 19, 1995
• Expiry date: Oct 12, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G05D16/2022
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A valve having a magnetic armature, which is moved longitudinally in a valve dome; a valve tappet of this armature carries a closing member of a seat valve, which is open when in the rest position. The seat valve is disposed in a valve chamber, from which two pressure fluid conduits lead to face ends of the magnetic armature, which is sealed on its circumference side. When the seat valve is partially open, a pressure is produced in a partial valve chamber by means of a shaping of the valve seat as a hollow cone and of the closing member as a flattened end ball. In the control chamber remote from the closing member, this pressure leads to a movement of the magnetic armature against the tension of a restoring spring, which results in a reduction of the through flow cross section of the seat valve. The valve is particularly useful in slip-controlled hydraulic brake systems of motor vehicles.