Akademik Veri Yönetim Sistemi
8th International Conference on Renewable Fuels, Combustion and Fire (FCE 2019), Antalya, Türkiye, 10 - 13 Mart 2019, cilt.1, sa.1, ss.178-188
Depletion of fossil fuels and environmental pollution has led researchers to foresee
the need to develop bio-fuels. Alcohols are a major part of bio-fuels. This study debates
combustion performance and exhaust emissions from SI engine fueled with ethanol-methanolgasoline blends. The fuel blends contained %100 gasoline, %80 gasoline and %20 ethanol, %80
gasoline and %20 methanol and %80 gasoline, %10 ethanol and %10 methanol by volume. The
excess air coefficient were kept at the lean (0.9), stoichiometric(1.0) and rich (1.1) conditions.
The effects of blended fuels on engine performance were investigated and results showed that
methanol-gasoline blends presents the highest volumetric efficiency; on the other hand, neat
gasoline showed the lowest volumetric efficiency, torque and brake power among all test fuels.
Maksimum in-cylinder pressure was occured ethanol-methanol-gasoline blend at rich
condition. Results indicated that when the engine was fueled with ethanol-methanol-gasoline
blends, the concentrations of CO and HC (unburnt hydrocarbons) emissions were significantly
decreased, compared to the neat gasoline. Ethanol-methanol-gasoline blends presented the
lowest emissions of CO and HC at stoichiometric and poor conditions but ethanol-methanolgasoline blend was the lowest at rich conditions among all test fuels. In addition to this NOx
emission increased when ethanol and/or methanol contents increased except stoichiometric
condition in the fuel blends.