Atomizing sieve and fuel injection valve having an atomizing sieve

US5707012A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Martin Maier · Asperg, DE
• Jurgen Buchholz · Kaufbeuren, DE
• Jorg Heyse · Markgröningen, DE
• Michael Klaski · Bornsteiner Straße, DE
• Edwin Liebemann · Bamberg, DE
• Klaus Wirth · Hallstadt, DE
• Mathias Thomas
• Klaus-Henning Krohn · Bamberg, DE
• Jutta Straetz · Ebelsbach, DE
• Stefan Lauter · Herbstein, DE
• Christof Dennerlein · Hirschaid, DE
• Anwar Abidin · Leonberg, DE

Key dates

• Filing date: Sep 29, 1995
• Grant date: Jan 13, 1998
• Expiry date: Sep 29, 2015

Classification

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

Abstract

An atomizing sieve of a fuel injection valve having a dish-like concavely cambered form is provided downstream of at least one spray orifice of the fuel injection valve, as seen in the direction of flow of fuel. The atomizing sieve is cast with an outer circumferential region in a protective cap provided at the downstream end of the fuel injection valve. For protection against mechanical effects, protective prongs of the protective cap project further downstream than the lowest region of the atomizing sieve. When the fuel is being injected, a part quantity collects in this lowest region and represents a comparatively static liquid quantity which new fuel then strikes. This arrangement allows an ideal break-up of the fuel into very small droplets. The atomizing sieve also forms a protective shield against icing-up, plugging and settlement of chemical substances within the fuel injection valve.