Patent · US Expired

Fuel injection valve for internal combustion engines

US6269795A · kind A · utility

4Cited by

8References

5Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Wolfgang Ripper · Stuttgart, DE
Werner Wagner · Bad Nenndorf, DE
Bernd Dittus · Tamm, DE
Manfred Mack · Riedlingen, DE

Key dates

Filing date	Jul 16, 1999
Grant date	Aug 7, 2001
Priority date	—
Expiry date	Jul 16, 2019

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M2200/304
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A fuel injection valve for internal combustion engines, having a valve member that is axially displaceable in a valve body and that with a sealing face cooperates, to control an injection opening, with a valve seat face on the valve body. An end of the valve member remote from the combustion chamber is urged in the closing direction by a valve spring disposed in a spring chamber. The valve member has a pressure shoulder acting in the opening direction, which protrudes into a pressure chamber that is filled with high fuel pressure. Via a throttle gap, the spring chamber communicates with the pressure chamber and is sealed off from a fuel return system, so that during the opening stroke motion of the valve member the spring chamber acts as a hydraulic damper.

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