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Performance and Emission Characteristics of MPFI Engine by Using Gasoline - Ethanol Blends

K B Siddegowda, J Venkatesh

Ethanol is rarely used as an automobile fuel; blends with standard gasoline are much more common. Use of higher (above 50%) ethanol gasoline blends required modification in both calibration and engine hardware. In this paper experiments are conducted on MPFI engine to study the performance and emission of the ethanol gasoline blended fuel. The ethanol is blended with 10%, 20%, and 30% by volume with gasoline. The various engine performance characteristics like BTE, BSFC and BSEC are recorded from the acquired data and emission parameters like UBHC, CO, C02, and NOX are measured using five gas BOSCH analyzer. The results are revealed that on adding the 20% ethanol to gasoline there is increase in the brake thermal efficiency and fuel consumption is slightly less as that of gasoline. It is also found that there is considerable amount of decrease in emission on using ethanol with gasoline blend. Experimental results indicated that when ethanol-gasoline blend is used, the engine CO and HC emission decreases notably as a result of the leaning effect caused by the ethanol addition and CO2 emission increases because of the improved combustion.