20905 A study of emission reduction for small gasoline engine by using Alcohol blend fuels

This study has been carried out to determine the influence on combustion products by using the gasoline with alcoholic fuel for small gasoline engine. The combustion behaviors are observed by pressure transducer, dynamometer and analyzer of exhaust gas. The fuels are used the blend fuel of gasoline, methanol (calorific value 15.7MJ/L) and ethanol (calorific value 21.2MJ/L). The oxygen concentration of intake air are changed 21 and 22vol% in this study. The main conclusions are as follows; 1) The observation C A of the maximum heat release rate can be possible to remove to early C.A side by using multi-alcoholic-gasoline fuels. 2) The No_x emission of the alcoholic(single component and multi-components)-gasoline fuels decreases remarkably than that of the gasoline fuel(single-ingredient) under the 21% ambient oxygen condition 3) The HC emission of the alcoholic(single component and multi-components)-gasoline fuels decreases with a few increasing the ambient oxygen concentration.