Patent ID: 6696132
Filing Date: 2004-02-24
Classification: B01D,B23H,F01N,Y02T,Y10S,Y10T

Abstract:
A diesel exhaust particulate filter comprising a plugged, wall-flow honeycomb filter body composed of ceramic material and comprising a plurality of parallel end-plugged inlet and outlet cells traversing the body from a frontal inlet end to an exhaust outlet end thereof, the cells being arranged in a checkerboard pattern,wherein the cells have non-equal square cross-sections formed by interior porous walls, the inlet cells having a greater cross-section than the outlet cells, the interior porous walls comprising a first portion facilitating communication between the inlet and outlet cells, wherein the first portion includes side walls of the inlet cells but not corner sections thereof, such that outlet cells border inlet cells at side walls only, the remaining portion of interior walls which excludes the first portion, engages only the inlet cells where not in communication with the outlet cells, wherein the remaining portion of the interior walls other than the first portion is composed of the corner sections of the inlet cells, such that inlet cells share corners with each other.