Patent · US Active

Fuel injector

US8864054B2 · kind B2 · utility

2Cited by

5References

15Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Matthias Burger · Bad Birnbach, DE
Hans-Christoph Magel · Pfullingen, DE

Key dates

Filing date	May 27, 2009
Grant date	Oct 21, 2014
Priority date	—
Expiry date	Nov 16, 2030

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M2200/705
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention relates to a fuel injector and, in particular, to a common-rail injector for injecting fuel into a combustion chamber of an internal combustion engine with a multi-part injection valve element, which can be adjusted between an open position and a closed position. A first part and a second part of the injection valve element are coupled to one another via a hydraulic coupler, which is bounded radially by a first guide for the first part and by a second guide for the second part. According to the invention, at least some sections of the first and the second guide are surrounded at their outer radii by fuel under high pressure, and the pressure realized in the hydraulic coupler is lower than the pressure radially outside the guides.

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