Experimental Investigation of four stroke spark ignition engine using alcohol petrol blends

Increasing global concern due to air pollution and to the limited oil reserves has generate much interest in the environmental friendly fuels alternative to petroleum based fuels, in particular for the transport sector in which the energy consumption depends almost exclusively on fossil fuels. Alcohols are an attractive alternate fuel because they can be obtained from number of sources, both natural and manufactured. Methanol and Ethanol are two kinds of alcohol can be obtained from many sources both fossil and renewable these include coal, petroleum, natural gas, biomass, wood and fills and even the ocean. In this work we prepared different alcohol petrol blends and find out optimum petrol blend for S.I. Engine. Then find different performance parameters like brake power, brake specific fuel consumption, torque, thermal efficiency for four stroke engine by using different blends. From that we find which is best possible blend that can be used in Four Stroke Spark Ignition Engine.