Fuel injector and method of manufacturing the same

Details Fuel injector and method of manufacturing the same Fuel injector and method of manufacturing the same

2006-08-15

2006-08-15

Hwu, Davis (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Fluid pressure responsive discharge modifier* or flow...

Fuel injector or burner

C239S088000, C239S585100, C239S585500, C239S533900, C239S533120, C239S005000

Reexamination Certificate

active

07090152

ABSTRACT:
A fuel injector including a tubular casing having an axial fuel passage. Disposed within the fuel passage are a valve seat element, a core cylinder, and a valve element axially moveably disposed therebetween and opposed to the core cylinder with an axial air gap. An electromagnetic actuator cooperates with the casing, the valve element and the core cylinder to form a magnetic field forcing the valve element to the open position against a spring between the valve element and the core cylinder upon being energized. The casing includes a reluctance portion producing an increased magnetic reluctance and allowing the magnetic field to extend to the valve element and the core cylinder through the air gap. The reluctance portion has a reduced radial thickness and an axial length extending over the air gap.

REFERENCES:
patent: 5392995 (1995-02-01), Wahba
patent: 5417373 (1995-05-01), Facchin
patent: 5692723 (1997-12-01), Baxter et al.
patent: 5783261 (1998-07-01), Potter et al.
patent: 5927613 (1999-07-01), Koyanagi et al.
patent: 5979786 (1999-11-01), Longman et al.
patent: 6062499 (2000-05-01), Nakamura et al.
patent: 11-6467 (1999-01-01), None
patent: 2000-8990 (2000-01-01), None
patent: 2001-27169 (2001-01-01), None

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