Fuel injector and in-cylinder direct-injection gasoline engine
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United States of America Patent
Stats
-
Feb 26, 2008
Grant Date -
Aug 31, 2006
app pub date -
Jan 31, 2006
filing date -
Feb 1, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A fuel injector has a plunger for opening/closing a fuel path to control the amount of fuel to be injected; a seat portion for the plunger; and a plurality of nozzle holes for injecting fuel passed through between the plunger and the seat portion, A nozzle plate is provided with the seat portion, and a taper-fuel inlet hole has a diameter that gradually reduces from the seat toward its outlet, An orifice plate is arranged downstream from the taper-fuel inlet hole, and is provided with a concave portion opposite to the nozzle plate, with a plurality of nozzle holes being formed concentrically at a bottom of the concave portion. Each nozzle hole has an inclined angle in the direction of the plate thickness within the concave area.
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