Comparative Study on Exhaust Emission and Engine Performance of Single Cylinder Spark-Ignited Engine Operated On Gasoline and Natural Gasuit

摘要

Emission and performance of a single cylinder spark ignited engine fuelled with both natural gas and gasoline were measured at full load and top gear performance up to 8500 rpm. Exhaust emission for both gasoline and natural gas was analysed at idle speed and average speed of 40 – 90 km/hr. The tests have shown that the natural gas fuelled engine gives a complete combustion, which decrease 99.6 % of carbon monoxide and 72.5 % of unburned hydrocarbon at a speed of 70 km/hr compares to gasoline fuel. However, lower calorific value and burning velocity of natural gas reduces engine power by 15%.