为了探讨行程动力学参数v·a_pos[95]和RPA（relative positive acceleration）对轻型汽油车在实际行驶排放试验（RDE， real driving emission）中排放特性的影响，采用OBS-ONE便携式车载排放测试系统（PEMS， portable emission measure system）对3辆国Ⅵ轻型汽油车进行了平顺、正常和激烈3种驾驶行为的实际行驶排放试验，计算各路段的窗口行程动力学参数和法规规定的行程动力学参数，并与各污染物排放特性的相关性进行对比分析。结果表明：相比法规规定的行程动力学参数，窗口的行程动力学参数v·a_pos[95]和RPA与3辆车的CO、PN排放因子有更强的相关性，在市区、市郊和高速路段下的相关系数波动幅度分别下降25%~44%、38%~64%和73%~96%，且NO_x排放因子只与窗口的RPA有较强的相关性。其结论是窗口的行程动力学参数v·a_pos[95]和RPA与污染物排放因子的相关性更加明显，能更好地反映不同驾驶行为下各污染物的排放水平。

To explore the influence of v·a_pos[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·a_pos[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 NO_xemission 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·a_pos[95] and RPA and pollutant emission factors is more obvious, which can better reflect the emission levels of pollutants under different driving behaviors.

U467.1

重庆市技术创新与应用发展专项面上项目（cstc2019jscx-msxmX0016）。