Fuel injection valve

US6296199A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Klaus Noller · Oppenweiler, DE
• Martin Mueller · Heubach, DE
• Reinhold Bruekner · Litzendorf, DE
• Juergen Rapp · Achern, DE
• Rainer Kocik · Charleston, US
• Juergen Schubert · Dirmstein, DE
• Konrad Funk · Gundelsheim, DE
• Clemens Willke · Ditzingen, DE

Key dates

• Filing date: Jun 7, 2000
• Grant date: Oct 2, 2001
• Expiry date: Jun 7, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M61/18
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel-injection valve, in particular, a high-pressure injection valve, for injecting fuel directly into a combustion chamber of a mixture-compressing internal combustion engine with externally supplied ignition is distinguished by the fact that a guide and seating area formed by three disc-shaped elements is provided at a downstream end of the valve. A swirl element is embedded between a guide element and a valve seat element. The guide element is used to guide a valve needle which passes through it and can move in the axial direction, while a valve closing segment of the valve interacts with a valve seat surface of the valve seat element. The swirl element has an inner opening area with multiple swirl channels. The three disc-shaped elements are permanently connected to each other, forming a positive-locking joint.