The influence of gasoline oxygen-containing additives on the emission characteristics of gasoline vehicles

The present study examined the effect of oxygenated fuel gasoline on vehicle emission characteristics. Emission tests were conducted using the Worldwide Harmonized Light Vehicle Test Cycle and performed under the low-temperature cold start, normal-temperature cold start and normal-temperature hot start, respectively. The test vehicles were fueled by 10 % ethanol-blended gasoline (E10), 95 gasoline (95#) and 10 % methyl tert-butyl ether blend gasoline (MTBE10) respectively. The results of conventional emission analysis show that: E10 effectively reduces CO and HC emissions, but the advantage of reducing NOx emissions is not obvious; With the increase of the starting temperature, the emissions of the vehicle decrease sequentially. The results of instantaneous emission analysis show that: the transient emission characteristics of oxygenated fuel gasoline are akin to 95#; CO, HC and NOx are generated in large quantities before 60 s of cycling, accounting for more than 60 % of the total emissions; The emission rates of CO and HC are closely related to the vehicle speed, and the emission rate of NOx is related to the acceleration driving behavior. In addition, using E10 and MTBE10 has no significant effect on CO₂ emissions. In general, these results can be used for future policies and emission reduction measures.