Fuel injection valve

US8020789B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Manfred Roessler · Manhattan Beach, US
• Achim Degel · Mühlacker, DE
• Rolf Keller · Rutesheim, DE
• Markus Gesk · Waldbronn, DE
• Guido Pilgram · Schwieberdingen, DE
• Bernd Einwiller · Freudental, DE
• Norbert Keim · Besigheim, DE
• Michael Lingner · Düsseldorf, DE

Key dates

• Filing date: Jul 2, 2003
• Grant date: Sep 20, 2011
• Expiry date: Sep 20, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49982
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injector for fuel injection systems of internal combustion engines includes a solenoid coil; an armature acted upon in a closing direction by a restoring spring; and a valve needle, which is connected to the armature in force-locking manner and on which a valve-closure member is formed, which forms a sealing seat together with a valve seat surface. The armature strikes against a stop face of an inner pole of the solenoid coil by way of a stop face, and the armature stop face is provided with a coating. The coating has a surface structure.