Exhaust aftertreatment filter with particulate distribution pattern
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United States of America Patent
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-
Apr 8, 2003
Grant Date -
Nov 28, 2002
app pub date -
May 24, 2001
filing date -
May 24, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An exhaust aftertreatment filter and method is provided for filtering engine exhaust. Varying cell size is provided to spread trapped contaminant particulate along a distribution pattern reducing heat concentration and the risk of melting during regeneration, to minimize hot-spot meltdown otherwise caused by high density concentration of trapped particulate during regeneration. Cell size is varied by varying volume and/or height and/or width and/or length. Tapering of cells is also provided to change the cross-sectional area from the upstream to the downstream end.
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