엔진운전조건에 따른 배기온도 모사

Abstract

To meet stringent emission standards, a considerable amount of development work is necessary to ensure suitable efficiency and durability of catalyst systems. The main challenge is to reduce the engine cold-start emissions. Close-coupled catalyst (CCC) provides fat light-off time by utilizing the energy in the exhaust gas. However, if some malfunction occurred during engine operation and the catalyst temperature exceeds 1050℃, the catalytic converter becomes deactivated and shows poor conversion efficiency. This paper describes an advanced application of a simulation code (WAVE) to the analysis of the exhaust gas temperature of a 4-cylinder gasoline engine for automotive application calculated. Exhaust gas temperature was validated with measured data as a function of engine speed, engine load, air/fuel ratio, and ignition timing. The correlation was good for measured gas temperatures compared to the calculated ones.