Diesel particulate filters

摘要

A ceramic filter (20) for trapping and combusting diesel exhaust particulates offering improved configurations that are significantly more resistant to thermal cracking and melting damage comprises a honeycomb filter body composed of porous ceramic material and including a plurality of parallel cell channels (26) traversing the body from a frontal inlet end (22) to an outlet end (24) thereof, a portion (30) of the cell channels are plugged in a non-checkered (32) pattern, and the remaining cell channels are plugged in a checkered pattern (36). In one embodiment the honeycomb filter body has a section of non-checkered (32) and a section of checkered (34) plugging at the frontal inlet end (22). In another embodiment the honeycomb filter body has a plurality of cell channels internal plugs (74). In another embodiment the honeycomb filter body has a plurality of partial cell channels which extend partially from the frontal inlet end (22) into the honeycomb filter body, and are unplugged at the frontal inlet end (22).