Fuel injector

US6814309B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Franz Rieger · Aalen, DE
• Thomas Ludwig
• Hans Schlembach · Mühlacker, DE
• Gottlob Haag · Markgröningen, DE
• Ulrich Brenner · Siegburg, DE
• Michael Huebel · Gerlingen, DE
• Juergen Stein · Mühlacker, DE
• Udo Sieber · Bietigheim, DE

Key dates

• Filing date: Nov 12, 2002
• Grant date: Nov 9, 2004
• Expiry date: Nov 12, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7891
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injector is described, in particular an injector for fuel injection systems in internal combustion engines, that includes a valve needle having a valve-closure member which cooperates with a valve-seat surface arranged in valve-seat member to form a sealing seat and which has several injection orifices which are arranged downstream from the sealing seat, and are sealed by sealing seat against a fuel supply. A disk element is arranged downstream from the sealing seat, the disk element having at least one valve section, which changes its shape when the temperature changes. Valve section is connected to a heating element and optionally covers an injection orifice.