Patent · US Expired

Fuel injector

US7086614B2 · kind B2 · utility

7Cited by

9References

5Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Hubert Stier · Asperg, DE
Guenther Hohl · Stuttgart, DE
Norbert Keim · Besigheim, DE

Key dates

Filing date	Aug 9, 2001
Grant date	Aug 8, 2006
Priority date	—
Expiry date	Dec 17, 2021

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M2200/28
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A fuel injector is described for fuel injection systems in internal combustion engines that includes a magnet coil, an armature that is acted upon in a closing direction by a restoring spring, and a valve needle that is non-positively engaged with armature for actuating a valve closing body, which together with a valve seat surface forms a sealing seat, and armature with an inlet-side armature surface striking internal pole. A choke point is provided on inlet-side armature surface, and is formed by an annular, stepped prominence on inlet-side armature surface.

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