SYSTEM AND METHOD FOR TREATING DIESEL EXHAUST GASES
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United States of America Patent
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Issued Date -
Jan 27, 2011
app pub date -
Apr 2, 2008
filing date -
Apr 2, 2008
priority date (Note) -
Abandoned
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Abstract
A system for treating diesel exhaust gases includes an engine for producing a diesel exhaust stream, a diesel particulate filter downstream of the engine and adapted to remove particulates from the exhaust stream, a heater upstream of the filter adapted to deliver energy in sufficient amounts to the exhaust stream to cause active regeneration of the filter, and a diesel oxidation catalyst upstream of the heater adapted to cause passive regeneration of the filter when the exhaust stream is above a light-off temperature of the diesel oxidation catalyst. A NOx reduction catalyst can be provided downstream of the heater. Methods for treating diesel exhaust gases are also disclosed.
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