Fuel injection valve and a method for manufacturing exit outlets on the valve

US6826833B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Martin Maier · Asperg, DE
• Guenther Hohl · Stuttgart, DE
• Guenter Dantes · Eberdingen, DE
• Detlef Nowak · Untergruppenbach, DE
• Joerg Heyse · Markgröningen, DE
• Norbert Keim · Besigheim, DE

Key dates

• Filing date: May 14, 2002
• Grant date: Dec 7, 2004
• Expiry date: Nov 19, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49306
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention relates among others to a method for producing outlet openings (32) in a valve, in particular a fuel injection valve. The injection valve has a fuel inlet (2), an excitable actuating device (1, 2, 19) by which a valve closing member (28) is movable, a fixed valve seat (27) embodied on a valve seat element (26), with which seat the valve closing member (28) cooperates to open and close the valve, and at least one outlet opening (32), as a fuel outlet, provided downstream of the valve seat (27). The at least one outlet opening 32 is produced in such a way that in a first method step, a through hole is created in the valve seat element (26), and in a second method step, from the ejection end of the through hole, an outlet region is created that is altered in shape and/or size and/or contour compared to the through hole.