Abstract
Exhaust gas odor in DI diesel engines is reduced mainly by improvement of in-cylinder combustion and by catalytic converter. The odor reduces by the engine modification of injection parameters, combustion chambers and compression conditions, though its effects are not sufficient. In this study, the effect of an oxidation catalyst on the exhaust odor was investigated by engine with common rail system. The preconditioned catalyst aging under the high temperature reduces exhaust components and odor just after starting due to good adsorption. At the catalyst temperature above 200℃, there were remarkable reductions of odor, but bellow 200℃, objectionable exhaust odor appears sharply.
