Technical Assessment of Performance Emission Characteristics of an SI Engine using Ethanol - Gasoline Blended Fuel

Abstract

Amongst alcohols, ethyl alcohol exhibits good burning characteristics due to which it is going to be use as additive in the spark ignition engines around the world. Alcohols have high octane rating and contain oxygen as compare to gasoline. Due to which the knocking tendency reduces which leads in the reduction of some exhaust emission such as CO (carbon monoxide). In this study, ethyl alcohol, an oxygenated fuel, was considered as a gasoline fuel additive. The experimental analysis of ethyl alcohol blended fuels with various blending rates (10, 20 and 30 percent by volume) on engine performance and exhaust emission were investigated using a four cylinder, four stroke spark ignition MPFI engine. The result showed that blending of ethanol with gasoline increase the brake thermal efficiency, brake specific fuel consumption and reduction in exhaust gas temperature. The exhaust emissions of carbon monoxide and hydrocarbon were found to be lower while the nitrogen oxide emission was high.