Low aspect ratio diesel exhaust filter
AssigneeCorning Incorporated
InventorDavid L. Hickman
Life of this patent
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Abstract
A porous ceramic filter offering both increased thermal mass and controlled exhaust flow performance for the filtration of particulates from diesel exhaust gases includes a wall-flow honeycomb filter body incorporating a plurality of parallel end-plugged cell channels traversing the body from filter inlet to filter outlet, the wall thickness, cell density, and outer dimensions of the honeycomb being selected to provide a honeycomb bulk density of at least about 0.50 grams/cm3 and an effective honeycomb length-to-diameter aspect ratio not exceeding about 0.9.
Claims8
A ceramic filter for trapping and combusting diesel exhaust particulates comprising an end-plugged porous ceramic honeycomb structure having:
- a honeycomb bulk density of at least about 0.50 grams/cm3;
- and
- an effective length-to-diameter aspect ratio not exceeding about 0.9.
A diesel exhaust particulate filter comprising a plugged, wall-flow honeycomb filter body composed of porous ceramic material and comprising a plurality of parallel end-plugged cell channels traversing the body from a frontal inlet end to an outlet end thereof, wherein:
- the honeycomb body has a honeycomb bulk density of at least about 0.50 grams/cm3, a cell density of at least 150 cells per square inch of frontal inlet area, a cell wall thickness of at least about 0.016 inches, and an effective length-to-diameter aspect ratio not exceeding about 0.9.
Dependencies are inferred from the claim text.