Comparison of Pride and Samand vehicles with different fuel delivery systems

This study aims to investigate the emissions of carbon monoxide, carbon dioxide and unburned hydrocarbons from the exhaust of Pride and Samand cars with different types and fueling systems in Mashhad during the 2012-2015 by Motor Gas Tester for 2000 cars. The data were analyzed by SPSS software and independent t-test, analysis of variance (ANOVA) and Duncan post hoc test (P <0.05). The results showed that type X7 among the other studied types of Samand has the lowest level of pollutant production, while no significant difference was observed in terms of the amount of pollutants emitted from the exhaust of different types of Pride. It was also found that the consumption of natural gas fuel in dedicated Pride increases the emission of pollutants and reduces in dedicated Samand, which indicates the better design of Samand in terms of fuel pump, type of kit used and other engine parts compared to Pride for usage of gas as an alternative fuel. It indicates that the combustion process in gasoline Pride is more complete and Samand is more suitable for using natural gas fuel.