Abstract:To explore the influence of v·apos[95] and relative positive acceleration(RPA) on emission characteristics of gasoline duty vehicles in the real driving emission (RDE) test, RDE emission tests are carried out on three China VI light gasoline vehicles using the OBS-ONE Portable Emission Measure System (PEMS) under smooth, normal and rough driving behaviors. Window travel dynamic parameters and section travel dynamic parameters are calculated and the correlation between the dynamic parameters and pollutant emission characteristics is analyzed. The results show that the fluctuation range of the window travel dynamic parameters v·apos[95] and RPA correlation coefficients with CO and PN emission factors of the three vehicles is significantly reduced compared with the travel dynamic parameters prescribed by the regulations. The fluctuation range is 25%-44%, 38%-64% and 73%-96% in urban, rural and motorway respectively. Moreover, the NOxemission factor is only strongly correlated with the RPA of the window. Therefore, it can be concluded that the correlation between the window travel dynamic parameters v·apos[95] and RPA and pollutant emission factors is more obvious, which can better reflect the emission levels of pollutants under different driving behaviors.
