Exhaust emission control device

F - Mech Eng,Light,Heat,Weapons – 01 – N

Patent

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F01N 3/02 (2006.01) F01N 3/022 (2006.01) F01N 3/023 (2006.01) F01N 3/027 (2006.01) F01N 3/05 (2006.01) F23J 15/02 (2006.01) F01N 13/04 (2010.01) F02B 3/06 (2006.01)

Patent

CA 2061745

An exhaust emission control device includes a single fliter 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 each being made of porous ceramic material and having a thin-walled cellular structure of 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.

n dispositif antipollution comprend un filtre unique composé d'une paire de plaques latérales toutes deux à section en L et assemblées intégralement en un cadre rectangulaire doté d'ouvertures d'entrée et de sortie, et une pluralité d'éléments filtrants en céramique alignés parallèlement à l'intérieur du cadre rectangulaire et retenus par les plaques latérales, chacun des éléments filtrants étant fait de céramique poreuse et ayant une structure cellulaire de section rectangulaire à parois minces formée d'une pluralité de passages s'étendant axialement et séparés les uns des autres par des parois minces, parmi lesquels un premier groupe de passages sont fermés en damier à une extrémité et ouverts à l'autre extrémité pour y faire entrer les gaz à purifier, tandis qu'un second groupe de passages sont ouverts à une extrémité pour laisser sortir les gaz purifiés et fermés en damier à l'autre extrémité.

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