Experimental Investigation of Diesel–Ethanol Fuel Blends in a Compression Ignition Engine

Depletion offossil fuels and environmental pollution has led researchers to foresee theneed to develop bio-fuels. Alcohols are a major part of bio-fuels. The interestin biofuels was stimulated by the fossil fuel depletion and global warming. Ethanolis promising alternative applicable in the internal combustion engine by virtueof its sustainability and soot-reducing potential. The paper deals with theanalysis of the impact of different fuel blends Diesel-Ethanol on theperformance and emissions in CI engine. Three different proportions of % 100diesel (E0), % 90 diesel - % 10 ethanol (E10) and % 80 diesel - % 20 (E20)ethanol by volume are blended with diesel that being used as fuel. Tests wereconducted on a liquid-cooled three cylinders Direct Injection (DI) dieselengine at %0, %25, %50, %75 and %100 load conditions at various ethanol mass.The effects of blended fuels on engine performance were investigated andresults showed that E10 presents the highest volumetric efficiency; on theother hand E20 showed the lowest volumetric efficiency. Maximum in-cylinder pressurewas occured conventional diesel combustion. Results indicated that theconcentrations of CO2 and HC (unburnt hydrocarbons) emissionsweren’t significant difference. E10 presented the lowest CO emission at allengine loads. In addition to this NO emission was peaked on E20 at %75 load.