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Naskah Diterima 19/09/2020 Naskah Direvisi 18/10/2020 Naskah Disetujui 31/12/2020 Naskah Online 31/12/2020 The increasing of NOx levels produced by CNG-fueled engines occurs when the fuel switches from gasoline to gas fuel (CNG). This study convert four stroke gasoline engine, into a CNG-fueled motorbike and provided additional cooling in the form of a burst of air to the cylinder block. Temperature of Engine block are detected using a temperature sensor placed on the engine oil. Bursts of air cooling result in temperature changes in engine oil. Changes in engine oil temperature are accompanied by changes in the resulting NOx emissions. This study shows that with a decrease in engine oil temperature in the carter, NOx emission levels also decrease. From the research results it can be ignored that by providing additional air bursts will be able to reduce NOx emissions by up to 18% Kata kunci: NOx, Temperatur, CNG, Nitrogen oksida, Emisi

Pengaruh Temperatur Mesin Terhadap Kadar Emisi NOx pada Motor dengan Bahan Bakar Compressed Natural Gas (CNG)