ENGINE PERFORMANCE OPTIMIZING METHOD FOR NATURAL GAS VEHICLE ACCORDING TO INGREDIENTS OF GAS

摘要

PURPOSE: A method for optimizing the performance of an engine is provided to control the fuel injection according to the change in components of the natural gas by applying the different map according to the change in air fuel ratio resulting from the change in the components of the natural gas. CONSTITUTION: A method for optimizing the performance of an engine comprises the steps of: setting a plurality of fuel amount control maps applied according to the fuel components; setting a specific map of the map as a reference map; detecting the engine condition and an UEGO(Exhaust Gas Oxygen) sensor output; comparing the UEGO sensor output with the corresponding value in the reference map; selecting another map of the plurality of the fuel amount control maps instead of the reference map if the UEGO sensor output is more than the corresponding value in the reference map; selecting another map of the plurality of the fuel amount control maps instead of the reference map if the UEGO sensor output is less than the corresponding value in the reference map; and using the selected map, and controlling the fuel amount according to the engine condition.