Fuel injection valve

US7093779B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Thomas Sebastian · Stuttgart, DE
• Juergen Graner · Sersheim, DE
• Wolfgang Ruehle · Ditzingen, DE
• Joachim Stilling · Weiler an der Zaber, DE
• Matthias Boee · Ludwigsburg, DE
• Norbert Keim · Besigheim, DE

Key dates

• Filing date: Jun 21, 2002
• Grant date: Aug 22, 2006
• Expiry date: Jul 16, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S239/90
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injector, in particular a fuel injector for fuel-injection systems of internal combustion engines, has a valve needle which cooperates with a valve-seat surface to form a sealing seat, and an armature which is connected to the valve needle, the armature being acted upon in the closing direction by a restoring spring and cooperating with a magnetic coil. The armature has a guide flange which is guided at an opposite surface. The guide flange does contact the opposite surface in all places, so that recesses are formed between the guide flange and the opposite surface.