Fuel system having purging capability for reduced fuel dribble
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United States of America Patent
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Aug 13, 2019
Grant Date -
May 2, 2019
app pub date -
Oct 30, 2017
filing date -
Oct 30, 2017
priority date (Note) -
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Abstract
A fuel system includes a fuel injector having a fuel passage and a purging fluid passage formed therein. A nozzle tip inner surface defines a sac forming a blind end of the fuel passage in the fuel injector. A coaxial concentric check assembly includes a purging check movable to admit a purging fluid such as pressurized air into the fuel passage to purge the sac of fuel. Reduced injector dribble is observed from the purging of fuel.
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