Patent · US Active

Fuel injector with an integrated pressure booster

US8348176B2 · kind B2 · utility

0Cited by

4References

17Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Juergen Frasch · Holzgerlingen, DE
Heinz-Bernd Haiser · Ludwigsburg, DE
Christoph Butscher · Leonberg, DE
Hans-Christoph Magel · Pfullingen, DE
Stephan Wehr · Heiligenstadt, DE

Key dates

Filing date	Jan 3, 2008
Grant date	Jan 8, 2013
Priority date	—
Expiry date	Aug 18, 2029

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M61/14
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

Proposed is a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine. The fuel injector has a housing in which are arranged an injection valve element with a nozzle needle, a pressure boosting device, and a first control valve, and a second control valve. The first control valve controls a control space of the nozzle needle and the second control valve controls a differential pressure space of the pressure boosting device. A first return flow connection is provided for discharging the control quantity of the control space of the nozzle needle, and a second return flow connection is provided for discharging the control quantity of the pressure boosting device. The two return flow connections are arranged on different housing parts of the housing.

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