Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...
Patent
1997-03-10
1998-08-04
Kwon, John T.
Power plants
Internal combustion engine with treatment or handling of...
By means producing a chemical reaction of a component of the...
2395339, F25C 124
Patent
active
057877084
ABSTRACT:
The present invention is particularly well suited for purifying exhaust from relatively large lean burn diesel engines. The emissions purification system causes the addition of an optimal amount of fuel through the engine fuel injector after closure of the fuel injector needle check valve by enlarging the fuel injector SAC volume. The optimal amount corresponds to an amount that will achieve optimal NOx reduction rates for the given engine operating condition and exhaust temperature when the exhaust is passes through appropriate deNOx and oxidation catalysts located downstream from the injector. The emissions purification system of the present invention has the ability to greatly reduce NOx content of the exhaust while maintaining HC emissions at acceptable levels and greatly reducing system complexity.
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Lane William H.
Learned Daniel J.
Peterson Randy N.
Smith Aaron L.
Caterpillar Inc.
Hampsch Robert J.
Kwon John T.
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