Abstract

This paper discusses the analysis of the bioethanol-fuel mixture on engine power and torque. The aim is to find alternative fuel sources that can reduce the amount of fuel needed. Onesource is bioethanol as a mixture of fuel in motorized vehicles and industry. The method used by testing using the Dynotest Hofmann tool on a 150 CCmotorbike. Research focuses on engine power and torque. With a variety of bioethanol-fuel mixture (10: 90%; 20: 80%; 30: 70%; 40: 60%; 50: 50%; 60: 40%; 70: 30%; 73: 27%). The results showed that the addition of bioethanol with a percentage of 10%, 20%, and 30% can increase the power in every rotation change, but in a mixture of more than 30% tends to experience a decrease in motor power with each increase in engine speed. This is because bioethanol still contains water, and the ratio of air to fuel is too low so that combustion is not complete

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