Study Simulating Emission Efficiency of Engines When Using CNG Fuels to Replace Gasoline Fuel

This paper uses AVL-Boost software to simulate the effects of converting an engine that is using gasoline to using CNG gas. Specifically, the article studies the economy process of the engine when using CNG gas fuel for gasoline engines by direct injection into the intake manifold and the method of using a mixer and then supplying it to the road. load. Experimental simulation model on Toyota - 5A engine, all structural parameters of the engine are kept original. The results of simulation study show that, when using CNG gas fuel, indicators such as: Emissions of harmful components CO, HC and NOx of engines using CNG are significantly reduced compared to using gasoline; CO decreased by 34% on average, HC decreased by 79% on average and NOx decreased by 29%. From the above simulation study, recommendations for manufacturers as well as users can be made to change when using CNG gas fuel for gasoline engines.