Patent · US Expired

Fuel injection valve

US6786433B2 · kind B2 · utility

4Cited by

5References

12Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Martin Maier · Asperg, DE
Joerg Heyse · Markgröningen, DE

Key dates

Filing date	Aug 15, 2002
Grant date	Sep 7, 2004
Priority date	—
Expiry date	Feb 24, 2023

Classification

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

Abstract

A fuel injector, e.g., a fuel injector protruding directly into a combustion chamber of an internal combustion engine, includes an energizable actuator, a valve-closure member able to be moved by the actuator, a secure valve seat, with which the valve-closure member cooperates to open and close the valve, a fuel outlet formed in a downstream spray-discharge region and by at least one outlet opening situated downstream from valve seat, and a dead volume formed downstream from valve seat and upstream from the spray-discharge region having at least one outlet opening. A surface of valve-closure member bordering the dead volume has a surface structure having at least several pores with a surface roughness of at least 25 &mgr;m for gas accumulation.

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