The performance of the otto engine with a capacity of 150 cc that uses several variations of pertalite mixture with bioethanol from cassava

This research aims to determine how much influence the fuel mixture of pertalite and bioethanol has on the optimal performance of the Otto engine and assess the level of exhaust emissions from each type of fuel used. The Otto engine to be tested is one cylinder with a 150 cc, Honda CRF 150L 2018 with fuel variations in Pertalite, Pertalite E10, Pertalite E15, and Pertalite E20. The research is carried out using a dyno test engine to determine the engine’s performance. In contrast, the exhaust emission test is carried out using the Suk-Young 401 Gas Analyzer through the exhaust emission sensor mounted on the exhaust of the Honda CRF 150L. The parameters used for the performance value of the Otto engine are torque, power, and thermal efficiency. From the calculation results of the test data, the average heating value of the fuel is 48823.6 kJ/kg (Pertalite), 42941.1 kJ/kg (Pertalite E10), 47491.2 kJ/kg (Pertalite E15), and 43676.5 kJ/kg (Pertalite E20). The maximum torque obtained from the dyno test results was 14.6 Nm at 5000 rpm using Pertalite E20. The maximum power received from the dyno test results is 9.5 KW at 7000 rpm using Pertalite E20. The maximum air-fuel ratio obtained from this test is 19.709 using Pertalite E15 at 3000 rpm. The highest value of Carbon Monoxide (CO) in Pertalite E20 is 988 ppm. For Hydrogen Sulfide (H2S) levels, the maximum value in Pertalite E10 is 10 ppm. For combustible gas (EX) levels, the maximum value for Pertalite E10 fuels is 7% LEL. For oxygen content (O2), the maximum value in Pertalite E10 and Pertalite E15 is 20.1 %vol.