Patent · US Expired

Fuel injection valve for internal combustion engines with damping chamber reducing pressure oscillations

US7172140B2 · kind B2 · utility

0Cited by

8References

5Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Walter Egler · Stuttgart, DE
Peter Boehland · Erbach, DE
Sebastian Kanne · Stuttgart, DE

Key dates

Filing date	Mar 22, 2002
Grant date	Feb 6, 2007
Priority date	—
Expiry date	Jun 27, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M2200/40
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A fuel injection valve for internal combustion engines, having a housing (12; 48) in which a pistonlike valve member (35; 60) is disposed longitudinally displaceably in a bore (34; 57). The valve member (35; 60) is surrounded, over at least part of its length, by a pressure chamber (37; 68), embodied in the housing (12; 48), that can be filled with fuel at high pressure; the valve member (35; 60) controls the communication of the pressure chamber (37; 68) with at least one injection opening (39; 66). The pressure chamber (37; 68) communicates with a damping chamber (46; 80), embodied in the housing (12; 48), via at least one throttle (44; 78) disposed in the housing (12; 48), so that pressure fluctuations that occur in the damping chamber (46; 60) rapidly fade (FIG. 1).

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