Effects of ethanol-gasoline blends on performance of SI engines | |
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( Volume 6 Issue 9,September 2020 ) OPEN ACCESS | |
Author(s): | |
Rishabh Saravgi, Chandrakant Hanspal | |
Abstract: | |
Ethanol-gasoline blend have been highly researched upon as a fuel by researchers since the oil crisis of 70’s, among all the alcohol that can be blended with gasoline, ethanol (C2H5OH) has been deemed as most suited for spark-ignition engines in terms of performance it can extract from the power unit, and therefore is used in NASCAR© in order to obtain a higher horsepower from statutory mandated capacity of engine, alongside ethanol being renewable and eco-friendly in nature helps achieving emission regulations without compromising on the performance. After reviewing several papers on ethanol gasoline blends and their effect on spark-ignition (SI) engine this literature review discusses the effect of ethanol-gasoline blends as a bio-fuel within the conventional spark-ignition engine. The review highlights the properties of ethanol and the effect of varied ethanol blends on the performance of the engine. The parameters discussed in this study are engine brake torque, brake power, engine volumetric efficiency, thermal efficiency, heat release rate, cylinder gas pressure, brake specific fuel consumption (BSFC), compression ratio. The interdependency of the parameter studied are also explained and their effect on each other in terms of performance is discussed. It's been inferred from the study that with the increasing percentage content of ethanol within the blend; the general thermal efficiency, heat release rate, engine volumetric efficiency and cylinder pressure increases leading to the better performance of the engine with no modification required; the need of the compression ratio for the occurrence of ignition also rises with the proportion of ethanol within the blend affecting the overall performance of the engine. |
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