Direct fuel injector assembly for a compressible natural gas engine
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United States of America Patent
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Nov 18, 2008
Grant Date -
Apr 21, 2005
app pub date -
Oct 20, 2003
filing date -
Oct 20, 2003
priority date (Note) -
Expired
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Abstract
This invention relates to the injection of compressible gaseous fuel directly into the combustion chamber of a reciprocating piston-type internal combustion engine. In particular, the invention provides apparatus and methods for low-pressure, high-speed direct injection of compressed natural gas into a combustion chamber of an engine. Using the present invention, relatively low intake pressures of about 50 to about 150 PSIG yield high-speed (sonic and supersonic) gas flow through the diverging nozzle portion for injection into the combustion chamber. Preferably, the gas reaches supersonic velocity, approaching Mach 1.5 to 2.5.
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