Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...
Reexamination Certificate
2011-08-30
2011-08-30
Nguyen, Tu M (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
By means producing a chemical reaction of a component of the...
C060S274000, C060S278000, C060S285000, C060S295000, C060S301000
Reexamination Certificate
active
08006481
ABSTRACT:
A method and apparatus are described to selectively reduce NOxemissions of an internal combustion engine. An exhaust aftertreatment system includes an injection device operative to dispense a hydrocarbon reductant upstream of a silver-alumina catalytic reactor device. A control system determines a NOxconcentration and hydrocarbon/NOx ratio based upon selected parameters of the exhaust gas feedstream and dispenses hydrocarbon reductant during lean engine operation. Included is a method to control elements of the feedstream during lean operation. The hydrocarbon reductant may include engine fuel.
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Blint Richard J.
Deng Ling
Lee Jong-hwan
Schmieg Steven J.
Viola Michael B.
GM Global Technology Operations LLC
Nguyen Tu M
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