Fuel injection valve

Details Fuel injection valve Fuel injection valve

2005-11-01

2005-11-01

Nguyen, Dinh Q. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Including valve means in flow line

Reciprocating

C239S585300, C239S585500, C239S533200, C239S533300, C239S533110, C239S533120

Reexamination Certificate

active

06959883

ABSTRACT:
When a needle is separated from a needle seat, upward pressure of pressurized fuel is applied to downward pressure receiving surface outer portion and an annular downward pressure receiving surface inner portion. A bottom portion side extending portion is provided, which extends in a direction of a longitudinal axis K—K from a needle bottom surface inner portion, which is a portion of a bottom surface of the needle on an inner side of the annular seal, into a sack beyond a nozzle chamber. When the needle is separated from the needle seat, an area of the downward pressure receiving surface inner portion to which the upward pressure of the pressurized fuel is applied is decreased by a cross sectional area of the bottom portion side extending portion.

REFERENCES:
patent: 4200237 (1980-04-01), Urlaub et al.
patent: 4269360 (1981-05-01), Kopse
patent: 5058549 (1991-10-01), Hashimoto et al.
patent: 5271565 (1993-12-01), Cerny
patent: A 10-274127 (1998-10-01), None
patent: A 2003-113754 (2003-04-01), None
patent: A 2003-184691 (2003-07-01), None
patent: A 2003-254189 (2003-09-01), None

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