218203 アルコール添加による小型ガソリン機関の燃焼生成物低減に関する研究(第三報)(一般04 熱力学・熱工学1)

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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, ion probe and analyzer of exhaust gas. The fuels are used the blend fuel of gasoline and ethanol (calorific value 21.2MJ/L). The oxygen concentration of intake air are changeable from 19〜23vol% in this study. In the previous report, the effect of using the fuel included oxygen and the oxygen addition encourage the combustion is confirmed, it has been understood to be able to decrease the quantity consumed of gasoline. However, the amount of the NOx has increased greatly along with the rise of the flame temperature. The main conclusions are as follows: 1) The NOx emissions decreases with decreasing the oxygen concentration of intake air at any engine speeds. 2) The best ethanol addition amount that adjusts to the density of the oxygen concentration exists to use the effect of the combustion promotion effectively. 3) It is possible to simultaneous control the combustion products by using the addition of ethanol and oxygen concentration of intake air oxygen.
2011-03-17