Rectangular outlet honeycomb structures, particulate filters, extrusion dies, and method of manufacture thereof
AssigneeCorning Incorporated
InventorsDouglas Munroe Beall, Suhao He, Achim Karl-Erich Heibel, Kenneth Richard Miller, Pushkar Tandon, David John Thompson
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Abstract
A particulate filter having a honeycomb structure of a matrix of interconnected porous walls including inlet cells and outlet cells defining a plurality of inlet channels and outlet channels, respectively, wherein at least a portion of the outlet cells are larger than any of the inlet cells, and a cross-sectional shape of at least some of the outlet channels is rectangular. Honeycomb extrusion dies, honeycomb bodies, honeycomb structures, and methods of manufacture are described, as are other aspects.
Claims15
A particulate filter comprising:
- a honeycomb structure comprising a matrix of intersecting porous cell walls extending in an axial direction between an inlet end and an outlet end of the honeycomb structure, the matrix defining a plurality of inlet cells and outlet cells, and corresponding inlet channels and outlet channels defined by respective inlet cells and respective outlet cells, wherein a cross-sectional area of at least a portion of the outlet channels is larger than a cross-sectional area of any of the inlet channels, there are 3 or more times as many inlet channels as outlet channels, and at least some of the outlet channels comprise a rectangular shape in cross-section, wherein either (a) the cross-sectional area of some of the outlet channels is greater than or equal to twice the cross-sectional area of an inlet channel, or (b) the rectangular shape comprises an outlet length Lo that is more than twice an inlet length Li across an inlet channel in a plane perpendicular to the axial direction;
- and
- wherein the matrix comprises a plurality of repeating structural units, each repeating structural unit comprising a group of walls defining a respective outlet channel and a plurality of abutting inlet channels adjacent the respective outlet channel.
Dependencies are inferred from the claim text.