轻型车实际行驶污染物排放特性试验研究

Experimental Study on the Emission Characteristics of Pollutants in Light Vehicle Actual Driving

本研究采用可携带式汽车尾气检测装置(PEMS)并以我国轻型车为研究对象,对其在不同工况下的真实尾气进行检测。研究发现,在以行驶动力为指标的平缓行车条件下,4台轻型车的RDE排放遵从系数均达到了规定的标准。在适当的行驶环境中,汽油车辆冷气起动气体污染约为柴油车辆的15-25%,而在柴油车辆中,其冷气起动气体污染所占的比重低于汽油车辆。结果表明:轻质燃油汽车的CO、PN浓度均随着加速而升高,且在高转速时表现出较高的相关性;轻柴油汽车尾气NOx排放量随着加速而上升。

In this study,a portable automobile exhaust gas detection device(PEMS)was used to detect the real exhaust gas under different working conditions by taking light vehicles in China as the research object.It is found that under the gentle driving conditions of driving power,the RDE emission compliance coefficients of the four light vehicles all meet the specified standards.In the appropriate driving environment,the airconditioning starting gas pollution of gasoline vehicles is about 15-25%of that of diesel vehicles,while in diesel vehicles,the proportion of airconditioning starting gas pollution is lower than that of gasoline vehicles.The results showed that the CO and PN concentrations of light fuel vehicles increased with acceleration,and showed high correlation at high speeds.NOx emissions from light diesel vehicles rise with acceleration.