Patent · US Expired

Fuel injection valve

US6869032B2 · kind B2 · utility

3Cited by

3References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Martin Maier · Asperg, DE
Guenter Dantes · Eberdingen, DE
Detlef Nowak · Untergruppenbach, DE
Joerg Heyse · Markgröningen, DE

Key dates

Filing date	Mar 27, 2002
Grant date	Mar 22, 2005
Priority date	—
Expiry date	Mar 27, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M61/1853
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A fuel injector, in particular for a high-pressure injector for direct injection of fuel into a combustion chamber of an internal combustion engine, has compression of a fuel/air mixture with spark ignition. On the downstream end of the valve a valve seat element is provided, to which a perforated disk acting as a flow restrictor is connected downstream. A swirl element is situated upstream from the valve seat which imparts an atomization-promoting rotational motion to the fuel to be injected. In the valve seat element downstream from the valve seat, an elongated outlet orifice is provided which opens directly into an orifice in the perforated disk attached to the valve seat element. The width of the outlet orifice is greater than the width of the orifice in the perforated disk, at least at its narrowest location, so that it is possible to adjust the steady-state flow rate of the valve at the orifice.

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