Fuel injection valve

Details Fuel injection valve Fuel injection valve

1996-07-11

1998-06-30

Weldon, Kevin

Fluid sprinkling, spraying, and diffusing

Fluid pressure responsive discharge modifier* or flow...

Fuel injector or burner

F02M 6100

Patent

active

057721246

ABSTRACT:
A fuel injection valve with improved fuel atomization which has a valve body, a needle valve accommodated in the valve body for opening and closing a fuel path at a sealing portion, and a metering member provided at a front end of the valve body and having a plurality of nozzle holes for metering a fuel and determining the fuel-injecting direction. The fuel injection valve comprises an inner wall of the valve body located downstream of the sealing portion which is shaped to be gradually contiguous to an upstream side surface of the metering member, and an intermediate surface of the needle valve for connecting the sealing portion and the most-downstream side bottom surface of the needle valve with each other forming the fuel path sloped inward in the downstream direction in association with the inner wall for introducing the fuel into the nozzle holes formed in the metering member when the needle valve is in an open state, wherein the intermediate surface of the needle valve being shaped in such a manner that a virtual intersecting line of a virtual linear extension of the intermediate surface and the upstream side surface of the metering member is positioned outside of a virtual circle circumscribing the upstream side openings of the nozzle holes formed in the metering member when the needle valve is in an open state.

REFERENCES:
patent: 4057190 (1977-11-01), Kiwior et al.
patent: 4423842 (1984-01-01), Palma
patent: 4646974 (1987-03-01), Sofianek et al.
patent: 4890794 (1990-01-01), Imafuku et al.
patent: 4934605 (1990-06-01), Hans et al.
patent: 5383607 (1995-01-01), Heyse et al.
patent: 5662277 (1997-09-01), Taubitz et al.

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