Diesel particulate filter having improved thermal durability
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United States of America Patent
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Issued Date -
Feb 14, 2008
app pub date -
Jun 12, 2007
filing date -
Jun 20, 2006
priority date (Note) -
Abandoned
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Abstract
Disclosed is a diesel particulate filter, including a plurality of cells, which are partitioned by porous cell walls and are closed in a staggered manner by plugs at the upstream end of the filter and at the opposite downstream end thereof, wherein a first oxidation catalyst coating layer is formed on the entire surfaces of the cell walls of the cells that are open at the upstream end of the filter, and a second oxidation catalyst coating layer is formed on the surfaces of the cell walls of the cells, which are open at the downstream end of the filter, in the downstream half part of the filter.
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