公开(公告)号：US5228892A

公开(公告)日：1993-07-20

申请号：US840071

申请日：1992-02-25

申请人： Yasuo Akitsu ,  Hideyuki Masaki ,  Hiroyuki Okahara

发明人： Yasuo Akitsu ,  Hideyuki Masaki ,  Hiroyuki Okahara

IPC分类号： B01D46/00 ,  F01N3/02 ,  F01N3/021 ,  F01N3/022 ,  F01N3/023 ,  F01N3/027 ,  F01N3/05 ,  F01N13/04 ,  F02B3/06 ,  F23J15/02

CPC分类号： F01N3/0233 ,  F01N13/017 ,  F01N3/0222 ,  F01N3/023 ,  F01N3/027 ,  F01N3/05 ,  F23J15/025 ,  F01N2330/06 ,  F02B3/06

摘要： An exhaust emission control device includes a single filter assembly composed of a pair of side plates respectively formed in an L-letter shape in cross-section and integrally assembled in a square framework having inlet and outlet openings, and a plurality of ceramic filter elements aligned in parallel within the square framework and clamped by the side plates. The filter elements are each made of porous ceramic material and have a thin-walled cellular structure square in cross-section formed with a plurality of axially extending passages separated from each other by thin partition walls, wherein a first group of the passages are closed at their one ends in a checked pattern and opened at their other ends to introduce therein exhaust gases to be purified, while a second group of the passages are opened at their one ends to discharge purified gases therefrom and closed at their other ends in a checked pattern.