engleski

Effects of Various Fuel Blends on the Performance of a Two-stroke Internal Combustion Engine

The purpose of this project was to study the influence of different fuel blends including gasoline, ethanol, stabilized hydrogen peroxide, water and Brown’s gas (oxy-hydrogen or HHO gas) on the operation of a two-stroke engine. Fuel consumption and temperature at the exhaust port were measured while the rpm of the engine was kept constant at 3600 rpm. Our tests did not show any significant effects of the addition of HHO gas on engine operation and fuel consumption. Increasing concentrations of ethanol in gasoline resulted with significant increasing trends of fuel consumption with ethanol concentrations above 20 % in gasoline and increased combustion temperatures. Hydrogen peroxide – water – ethanol blends did not increase engine efficiency. The engine did not function with more than 10 % H2O2 and 10 % H2O in ethanol. The presence of hydrogen peroxide had negative impact on the properties of carburetor membranes. Results indicate that fuel comprising 20 % ethanol in gasoline achieves the highest efficiency as compared to other blends, pure gasoline and pure ethanol. The components of the blends did not show any signs of separation/stratification from the mixture.

alternative fuels; ethanol; hydrogen peroxide; two-stroke engine; combustion; performance

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