Fuel Injection System for Diesel Engines with Compression Ignition
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United States of America Patent
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Issued Date -
Dec 5, 2013
app pub date -
Jun 5, 2013
filing date -
Jun 5, 2012
priority date (Note) -
Abandoned
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Abstract
In a fuel injection system and method for a diesel engine with compression induced ignition, NOx emissions are reduced by providing a supplemental fuel injection from a supplemental injection nozzle, in addition to the primary fuel injection through a primary injection nozzle. The supplemental injection nozzle injects a supplemental quantity of fuel onto a vaporization surface such as an exhaust valve, a flame ring area, or a top surface of the piston, in the combustion chamber, whereupon the supplemental fuel vaporizes and forms a lean air/fuel mixture. Thereafter, the primary injection nozzle injects the main fuel charge into the combustion chamber, to produce a rich air/fuel combustion mixture, which is then ignited and combusts.
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