驾驶行为对重型柴油车实际道路行驶排放测试的影响

为探究驾驶行为对重型柴油车实际行驶污染物排放的影响,利用车载便携式排放测试系统(PMES,portable emissions measurement system)对3辆车分别进行了平稳驾驶、正常驾驶和激烈驾驶共9次PEMS试验.对每辆车前后3次试验的市区、市郊、高速路段和总行程路段动力学参数v·apos95]和比排放进行了计算,并利用动力学参数v·apos95]对污染物排放特性影响进行了深入分析.结果表明:相较于平稳驾驶,正常驾驶和激烈驾驶行为下3辆车NOx比排放增加33.73％～621.10％,PN比排放增加21.26％～122.40％;同时CO比排放与车辆动力学参数v·apos95]之间无明显影响关系,市郊、高速路段NOx比排放和PN比排放与车辆动力学参数v·apos95]存在较强的相关性,可见其驾驶行为对车辆排放的影响不容忽视.

Impact of driving behavior on real driving emissions from heavy-duty vehicles equipped with diesel engines

In order to investigate the impact of driving behavior on real driving emissions (RDE) of heavy-duty diesel vehicles, a total of 9 times of smooth driving, normal driving and rough driving were carried out on three vehicles using the portable emissions measurement system (PMES). The dynamic parameters v·a_pos95] and emission factors of the urban, rural, motorway section and total travel distance of each vehicle were calculated before and after the three tests, and the dynamic parameters v·a_pos95] were used to analyze the effects of pollutant emission characteristics. The results show that compared with smooth driving, the NO_x emission factors of the three vehicles under normal driving and rough driving behavior increase by 33.73%-621.10% and the PN emission factors increase by 21.26%-122.40%. At the same time, the correlation between CO emission factors and the dynamic parameters v·a_pos95] is not obvious, but the NO_x emission factors and PN emission factors of suburbs and high-speed sections have a strong correlation with the dynamics parameters v·a_pos95]. It can be seen that the impact of driving styles on vehicle emissions cannot be ignored.