Outward opening fuel injector

Details Outward opening fuel injector Outward opening fuel injector

2011-07-19

2011-07-19

Nguyen, Dinh Q (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Including valve means in flow line

Reciprocating

C239S584000, C239S585100, C239S533700, C239S533110, C123S299000, C123S446000, C123S447000

Reexamination Certificate

active

07980492

ABSTRACT:
A fuel injector provided with: an injection valve comprising an injection nozzle; a mobile needle for regulating the fuel flow through the injection valve and ending with a shutting head, which engages a valve seat of the injection valve, is arranged externally with respect to injection valve and presents a predetermined sealing diameter; an actuator for displacing the needle between a closing position and an opening position of the injection valve; a closing spring which tends to maintain the needle in the closing position of the injection valve pushing the shutting head against the valve seat itself in a sense contrary to the feeding sense of the fuel; and a supporting body having a tubular shape and presenting a feeding channel within which a needle is arranged; the needle, at an opposite end of the shutting head, is coupled to a balancing channel, which is at ambient pressure.

REFERENCES:
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patent: 3450353 (1969-06-01), Eckert
patent: 4844339 (1989-07-01), Sayer et al.
patent: 5024202 (1991-06-01), McKay
patent: 5400970 (1995-03-01), Alt et al.
patent: 6561436 (2003-05-01), Boecking
patent: 2006/0283424 (2006-12-01), Nagatomo et al.
patent: 3834446 (1990-04-01), None
patent: 1717437 (2006-02-01), None
patent: 1734251 (2006-12-01), None
patent: WO9004098 (1990-04-01), None
European Search Report dated Feb. 21, 2008 based on EP application No. EP07425255.

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