Patent · US Expired

Fuel injection valve

US6772965B2 · kind B2 · utility

20Cited by

3References

11Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Fevzi Yildirim · Gerlingen, DE
Guenther Hohl · Stuttgart, DE
Michael Huebel · Gerlingen, DE
Norbert Keim · Besigheim, DE

Key dates

Filing date	Jul 2, 2002
Grant date	Aug 10, 2004
Priority date	—
Expiry date	Jan 27, 2023

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M61/047
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A fuel injector, e.g., an injector for fuel injection devices in internal combustion engines, has a valve needle with a valve-closure member which cooperates with a valve seat surface in a valve seat body to form a sealing seat, in which the valve seat body has a plurality of injection orifices that are isolated from the fuel supply by sealing seat. The valve-closure member has a pressure element in a recess facing the valve seat body, which is pre-tensioned against the valve seat body by a spring which is supported on the valve-closure member and presses a disc spring against the valve seat body, in such manner that the disc spring covers at least one of the injection orifices, and the spring element uncovers this injection orifice when the tension exerted by the pressure element is removed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.