Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...
Reexamination Certificate
2005-07-12
2005-07-12
Denion, Thomas (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
By means producing a chemical reaction of a component of the...
C060S274000, C060S286000, C060S295000, C060S301000, C060S303000, C060S311000
Reexamination Certificate
active
06915629
ABSTRACT:
An after-treatment system arrangement and method of operating the after-treatment system arrangement is provided for heating the exhaust gas of an internal combustion engine. The after-treatment system arrangement includes an oxidation device for catalytically oxidizing the exhaust gas and a port in the exhaust-gas stream for selectively introducing a controlled amount of oxygen into the exhaust gas in response to a condition of the exhaust gas. The introduction of oxygen can be selectively controlled in response to the temperature of the exhaust gas downstream of the oxidation device. Simultaneously or alternatively, the introduction of oxygen can be selectively controlled in response to the chemical composition of the exhaust gas. The air-to-fuel ratio of the exhaust gas may also be controlled to further facilitate heating of the exhaust gas. The after-treatment system arrangement can also be controlled to remove pollutant emissions from the exhaust gas.
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Denion Thomas
General Motors Corporation
Marra Kathryn A.
Tran Diem
LandOfFree
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