De-sulfurization of nox adsorber catalyst in a diesel engine...

Details De-sulfurization of nox adsorber catalyst in a diesel engine... De-sulfurization of nox adsorber catalyst in a diesel engine...

F - Mech Eng,Light,Heat,Weapons

01

N

F01N 3/00 (2006.01) F02M 25/06 (2006.01)

Patent

CA 2572853

De-sulfurizing a NOx adsorber catalyst (48) without significantly increasing the temperature of exhaust gases leaving the engine exhaust manifold (42) by using a diesel oxidation catalyst (46) between the exhaust manifold (42) and the NOx adsorber catalyst (48) to elevate exhaust gas temperature entering the NOx adsorber catalyst (48) to suitable de-sulfurizing temperature through control of certain aspects of engine operation (24, 28, 52).

L'invention concerne la désulfuration d'un catalyseur adsorbeur NOx (48) sans augmentation importante de la température des gaz d'échappement quittant les tubulures d'échappement des gaz du moteur (42), au moyen d'un catalyseur d'oxydation diesel (46) situé entre les tubulures d'échappement (42) et le catalyseur adsorbeur NOx (48), de manière à élever la température des gaz d'échappement entrant dans le catalyseur adsorbeur NOx (48) à une température de désulfuration appropriée, par le biais de la commande de certains aspects du fonctionnement du moteur (24, 28, 52).

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