Patent · US Expired

Fuel injection valve

US6824084B2 · kind B2 · utility

10Cited by

7References

15Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Martin Maier · Asperg, DE
Guenther Hohl · Stuttgart, DE

Key dates

Filing date	Jul 29, 2002
Grant date	Nov 30, 2004
Priority date	—
Expiry date	Nov 26, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S239/90
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A fuel injector (1) for fuel injection systems of internal combustion engines has a solenoid (10), a valve needle (3) pressed in the closing direction by a return spring (23) to activate a valve closing member (4), which together with a valve seat surface (5) forms a sealing seat, and an armature (20) in friction-locking connection with a valve needle (3). A first guide sleeve (35) and a second guide sleeve (36) are connected to the valve needle (3). The armature (20) has radial play with respect to the valve needle (3) as a result of the central opening (34), the diameter of which is greater than the diameter of the valve needle (3).

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