Analysis of the emissions of ethanol / gasoline mixtures in a single-cylinder engine

Ethanol is a renewable fuel used in internal combustion engines, as a strategy to reduce the polluting emissions and dependence on fossil fuels. The use of ethanol and its blends with gasoline or diesel has been beneficial in environmental aspects, due to is possible to reduce emissions of CO, HC, NOx, and Soot. Therefore, this work presents the emissions of an engine operating with ethanol/gasoline blends. The tests were performed on a single cylinder engine Changfa 186F fuelled with blends 50%, 20% y 8% etanol/gasoline (E50, E20, E8), operating in five different rotational velocity (RPM) and three load levels, measuring exhaust emissions for each test. The results allowed conclued that lower CO and NOX emissions are obtained with the increase of ethanol in the blend, moreover, the increasing engine load reduces the difference in CO and NOx emissions between ethanol/gasoline blends by up to 25%.