Fuel injection valve

US6382533B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Martin Mueller · Heubach, DE
• Anh-Tuan Hoang · Plymouth, US
• Frank Dallmann · Kornwestheim, DE
• Jens Pohlmann · Bietigheim-Bissingen, DE
• Martin Buehner · Backnang, DE
• Peter Land · Dayton, US
• Norbert Keim · Besigheim, DE

Key dates

• Filing date: Dec 21, 2000
• Grant date: May 7, 2002
• Expiry date: Dec 21, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injector, in particular a high-pressure injector for directly injecting fuel into a combustion chamber of a mixture-compression, spark-ignition internal combustion engine, which is characterized by the fact that at a valve seat element a conical section is formed having a valve seat surface, to which an outlet opening is immediately joined in the downstream direction. The outlet opening has an intake plane, whose central point lies on the valve longitudinal axis, whose central axis, however, runs diagonally with respect to valve longitudinal axis. A disk-shaped swirl element is arranged upstream of the valve seat element. The swirl element has swirl channels, which are distributed over the periphery, the swirl channels having varying geometries or dimensions.