Patent · US Expired

Fuel injector

US6935582B2 · kind B2 · utility

1Cited by

1References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Wolfgang Ruehle · Ditzingen, DE
Matthias Boee · Ludwigsburg, DE
Norbert Keim · Besigheim, DE

Key dates

Filing date	Aug 23, 2002
Grant date	Aug 30, 2005
Priority date	—
Expiry date	Aug 23, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M2200/31
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A fuel injector includes a magnetic coil, which cooperates with an armature which, together with a valve needle acted upon by a restoring spring, forms an axially movable valve part. A valve-closure member which forms a sealing seat together with a valve-seat member, is provided at the valve needle. Furthermore, the fuel injector includes an inner pole and an outer pole which form a magnetic circuit together with the magnetic coil, and a central fuel supply. A sleeve is situated in the central fuel supply of the fuel injector in such a way that a flow route of the fuel through the fuel injector is formed such with respect to length and diameter that the frequency of natural oscillations which are excited by the fuel flowing through the fuel injector, is adjusted to the closing intervals of the fuel injector.

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