Performance analysis of biofuels and gasoline in SI engines

Abstract

Considering energy crises and pollution problems today, investigations have been concentrated on decreasing fuel consumption by using alternative fuels and on lowering the concentration of toxic components in combustion products. In the present work, the variable compression ratio spark ignition engine designed to run on gasoline has been tested with pure gasoline, and bio-alcohols namely ethanol, butanol and acetone mixed with different proportions by volume without any engine modifications has been tested and presented the result. Brake thermal and volumetric efficiency variation with brake power is compared and presented. CO2, CO, O2, HC and NOx emissions have been also compared for all tested fuels.