Investigating the effects of isobutanol-gasoline blends on exhaust emissions and engine performance in a spark ignition engine

This is the effects of isobutanol, which is an isomer of butanol, mixed in different ratios in gasoline fuel in a low-power single-cylinder spark ignition engine exhaust emissions on and engine performance according to engine load changes. The amount of isobutanol in the fuel compared to gasoline fuel reduced CO emissions. The addition of isobutanol reduced HC emissions for all engine loads. In addition, the formation of isobutanol accumulation in the fuel in the spark ignition engine significantly reduced NOx emissions compared to gasoline. For the highest engine load, NOx emissions decreased by 39.55% for I20 fuel compared to gasoline. An increase was shown compared to brake specific fuel consumption gasoline in all mixture ratios with the use of isobutanol. The minimum brake specific fuel consumption was obtained as 383.76 g/kWh at 5000 W load with the use of I0 fuel. The maximum brake thermal efficiency value was obtained at 5000 W with the use of I0 fuel.