EFFECT OF GASOLINE RON 92 AND ETHANOL MIXTURE ON ENGINE PERFORMANCE AND EMISSIONS

Abstract

This study aims to examine the effect of varying the ratio of RON 92 petrol and ethanol blends on engine performance and exhaust emissions in a 12K00 type engine. The research method involved a dynamometer test to measure power, torque and air fuel ratio (AFR) and a gas analyser to analyse exhaust emissions (CO, HC, NOx and CO2). The population of the study was a 12K00 type engine, with the samples being various blend ratios of RON 92 petrol and ethanol: 100:0, 90:10, 85:15, 80:20, and 75:25. The results showed that increasing the ethanol content of the fuel blend significantly reduced CO and HC emissions, with optimal ratios found at 85:15 and 80:20 blends for the best performance and lowest emissions. A reduction in CO2 emissions was seen at higher ethanol ratios, despite an initial increase at low blend ratios. This study concludes that the use of ethanol as a petrol blend has a positive impact on engine performance and reduces exhaust emissions, making it a more environmentally friendly fuel solution.