DE-SULFURIZATION OF NOX ADSORBER CATALYST IN A DIESEL ENGINE EXHAUST SYSTEM

摘要

De-sulfurizing a NO_x 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 and the NO_x adsorber catalyst to elevate exhaust gas temperature entering the NO_x adsorber catalyst to suitable de-sulfurizing temperature through control of certain aspects of engine operation ( 24, 28, 52 ).