Apparatus and method for filtering particulate and reducing...

B - Operations – Transporting – 01 – D

Patent

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B01D 46/00 (2006.01) B01D 53/94 (2006.01) F01N 3/00 (2006.01) F01N 3/022 (2006.01) F01N 3/023 (2006.01) F01N 3/025 (2006.01) F01N 3/027 (2006.01) F01N 3/031 (2006.01) F01N 3/033 (2006.01) F01N 3/035 (2006.01) F01N 3/08 (2006.01) F01N 3/20 (2006.01) F01N 3/28 (2006.01) F01N 3/36 (2006.01) F01N 3/38 (2006.01) F01N 11/00 (2006.01) F01N 13/02 (2010.01) F01N 13/04 (2010.01)

Patent

CA 2481774

An apparatus and method for filtering particulate from an internal combustion engine by use of monolithic particulate trap systems having porous walls (2c, 24c). The porous walls (2c, 24c) filter the particulate. The filtered particulate on inner surfaces of the porous walls is periodically removed or regenerated via back flow of previously filtered exhaust gas. The back flow is caused by creating a pressure difference across the porous walls. The back flow of the previously filtered exhaust gas is simultaneously or sequentially coupled with high velocity through flow of exhaust gas in the channels. In addition, the particulate trap system can be an adsorber-catalyst particulate trap system for filtering particulate and reducing NOx via an adsorber- catalyst trap systems to achieve the EPA 2007 standards.

L'invention concerne un appareil et un procédé de filtration de particules provenant d'un moteur à combustion interne au moyen de systèmes monolithiques de piégeage de particules à parois poreuses (2c, 24c). Les parois poreuses (2c, 24c) filtrent les particules. Les particules filtrés se trouvant sur las surfaces internes des parois poreuses sont périodiquement éliminées ou régénérées par un conte courant de gaz d'échappement déjà filtrés. Le contre courant est provoqué par la création d'une différence de pression à travers les parois poreuses. Le contre courant de gaz d'échappement déjà filtrés est couplé simultanément, ou séquentiellement, à un courant traversant de gaz d'échappement de vitesse élevée dans les canaux. En outre, le système de piégeage de particules peut être constitué d'un système de piégeage de particules à adsorption-catalyse destiné à filtrer les particules et à réduire la teneur en NOx via des systèmes de piégeage à adsorption-catalyse afin de réaliser les standards EPA.

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