An experimental study on the effects of bioethanol - Gasoline blends on engine performance in a spark ignition engine

Bioethanol is a renewable fuel that can be produced through different methods of agricultural fermentation. In the present study, the effects of bioethanol-unleaded gasoline blends on engine performance were investigated in a spark ignition engine. Unleaded gasoline and unleaded gasoline-bioethanol blends containing 50% and 100% by volume bioethanol respectively were tested in the engine and the test results were compared. The results of the study showed that the use of unleaded gasoline as fuel yielded better engine performance. However, regarding engine torque and power, the use of bioethanol-unleaded gasoline blends caused decreases at rates of up to 15% in the amount of torque and power. Specific fuel consumption is increased.