Effects of Oxygenates and Aromatics in Gasoline on Vehicle Particulate Emissions
There have been tremendous improvements in China fuel quality in recent years in conjunction of newly implementing vehicle emissions standards to combat air pollutions in China. As the focus of the concern in the particulate emissions on the gasoline engine with ever popular gasoline direct inject (GDI or SIDI) engines, China 6 emission standard introduces PM/PN requirements for all spark ignition gasoline vehicles. Furthermore, ethanol and aromatics are widely used as octane booster changing the structure of gasoline pool. Nevertheless, the composition of gasoline is one of the factors affecting PM/PN emissions. In this study, different gasoline samples with two oxygenates in ethanol and methyl tert-butyl ether (MTBE), and heavy aromatic hydrocarbons were studied on a vehicle with a GDI engines. Vehicle tests were performed on Worldwide Harmonized Light Vehicles Test Cycle (WLTC).