EXPERIMENTAL STUDY OF SI ENGINE EMISSIONS FUELED WITH DIFFERENT OXYGEN-FUELS.

This paper describes an experimental study on a modern passenger car engine in order to evaluate the emission performance fueled with 6 gasoline fuels, 5 ethanol gasoline fuels and 1 methanol gasoline fuel. The results show that the emissions do not show significant differences using E10, M15 and normal gasoline fuels before the three-way catalyst. The average emissions of oxygen-fuels is lower than that of gasoline fuels, only the HC emission of methanol gasoline in idling condition is an exception. After the catalyst, the NOx emission of different fuels varied remarkably, sulfur and arene contents are the main factors, while the CO and HC emissions do not show significant correlation with the organic compound in fuels. Specific fuel consumption rate of ethanol and methanol gasoline fuels are a little higher than that of normal gasoline fuels, but using oxygen-fuel produced less CO2. Oxygen-fuels have only a little effect on engine power. The maximum power using ethanol and methanol gasoline fuels are a bit lower than normal gasoline. [ABSTRACT FROM AUTHOR]