基于交通指数的机动车污染物排放分析方法研究——以北京为例

Research of the Analysis Method of Vehicle Pollutant Emissions Associated With Traffic Index——Taking Beijing as an Example

为了科学有效地支持城市化机动化进程中交通治污治堵一体化工作,研究建立了交通指数与基于车辆比功率(vehicle specific power,VSP)的机动车污染物排放相关联的分析方法,通过分析交通指数与微观车辆行程速度分布的一致性规律,利用海量逐秒运行工况数据和车辆排放特征数据,建立了机动车辆在实际道路上运行速度与排放强度之间的关系,并以北京市为例,研究发现交通指数与小客车氮氧化物排放强度在道路类型、工作日周末、上下午等因素下具有明显的正相关关系,影响程度由大到小分别是道路类型、工作日周末、上下午.

In order to effectively support the city motorization process with control of pollution and congestion,the traffic index was established based on vehicle specific power(VSP) method for analysis of the vehicle emissions.Through the analysis of the traffic index micro vehicle travel speed distribution,massive data by the second operation and vehicle emission characteristic data were used to establish relationship of motor vehicle between the speed and emission factors on the real road.And taking Beijing city as an example,the research shows that the traffic index and passenger car NO_x emission intensity has significant positive correlation between the types of road,between working days and weekends,between AM and PM,et al.The influence degree from big to small are the road types,difference between working days and weekends,difference between AM and PM.