Fuel injection valve

US5785254A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Georg Zimmermann · Gerlingen, DE
• Horst Magenau · Gerlingen, DE
• Juergen Buehring · Stuttgart, DE
• Gilbert Moersch · Stuttgart, DE
• Joerg Heyse · Markgröningen, DE
• Harald Koenig · Bernhardswald, DE
• Michael Klaski · Bornsteiner Straße, DE

Key dates

• Filing date: Mar 12, 1997
• Grant date: Jul 28, 1998
• Expiry date: Mar 12, 2017

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 injection valve has downstream a valve seat (23), an injector plate (23), which is characterized by having a plurality of swirl-producing elements on the intake side, followed by at least one uninterrupted annular gap in the downstream direction. The swirl-producing elements are arranged in a turbine vane-shaped form by each individual element running mostly radially and being tilted in the peripheral direction and the elements being arranged behind one another in a circular shape. The annular gap (45) represents the spray geometry. With this arrangement the fuel can be finely atomized without additional power consumption. The breakup into minute droplets results in further reduction of the exhaust emissions of an internal combustion engine and in lower if fuel consumption. The fuel injection valve is especially well-suited for use in injection systems of mixture-compression externally ignited internal combustion engines.