Examining the effect of adding natural gas to an engine using a gasoline-methanol mixture as fuel on engine performance and emissions

The power produced by the combustion of fossil fuels in internal combustion engines is transferred to the powertrain, and this generated power causes carbon dioxide (CO2) and particulate matter emissions. Systems that do not cause CO2 and other harmful emissions or cause less emissions are a strong alternative. In this context, methanol and natural gas are added to the engine to reduce emissions. In this study, engine performance and emissions were examined using three fuel mixtures. A two-cylinder gasoline engine was run using M20 fuel and natural gas was added at different rates from the engine manifold. The engine was operated at a constant 3000 rpm and using 6 different fuels (gasoline, M20, M20+50 g natural gas, M20+100 g natural gas, M20+150 g natural gas, M20+200 g natural gas), at different torque values (5, 10, 15 and 20 Nm) engine performance and emission values were compared. When fuel consumption is compared to gasoline fuel, the overall cycle average is 6% higher in M20, 3% higher in M20+50 and M20+100, 1% higher in M20+150 and 6% higher in M20+200, and emissions are reduced compared to gasoline in other fuels.