Patent · US Active

Fuel injector

US7954475B2 · kind B2 · utility

0Cited by

9References

18Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Nadja Eisenmenger · Stuttgart, DE
Michael Mennicken · Wimsheim, DE
Hans-Christoph Magel · Pfullingen, DE

Key dates

Filing date	Apr 25, 2007
Grant date	Jun 7, 2011
Priority date	—
Expiry date	Jun 9, 2027

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M2547/001
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A fuel injector for injecting fuel into a combustion chamber of an internal combustion engine. A fuel supply line enters an injector housing from a high-pressure fuel source which can be hydraulically connected to a pressure chamber. A 3/2 directional control valve for injecting fuel into the combustion chamber has a valve piston which can be moved axially back and forth between a rest position and an injection position. The 3/2 directional control valve, by a first end face of the valve piston, is hydraulically coupled to and can be activated by a piezoelectric actuator. The 3/2 directional control has a ball element which is connected to a second end face of the valve piston and, in the rest position, can be moved against a first sealing edge and, in the injection position, can be moved against a second sealing edge.

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