基于浮动车数据的机动车排放实时测算模型

根据浮动车检测技术可针对单车采集,所收集数据中的平均速度按照采样间隔连续的特点,利用道路实测数据建立了面向其应用的轻型车尾气排放实时测算模型.模型中引入平均速度增量(ASI)指标对平均速度进行细分,并以其来反映相同平均速度下的排放变化.结果表明,与实测数据相比,模型对CO2的计算误差在10%以内;NOx、HC和CO的计算误差在15%以内.同时提出了模型使用方法,可以实现对路网中交通尾气污染的实时测算和动态评估.

Real-time calculation model for vehicle emissions based on floating car data

Floating car detection technology can collect data for single car, and the average speed in the data is continuous according to constant sampling interval. In view of this feature, a real-time emission model for light duty vehicles was established using road test data. In the process of modeling, one parameter of average speed increment (ASI) was applied to classify the average speed, and reflect emission changes under the same average speed. Compared with the test values, the calculation errors of the model are less than 10% for CO2, and are less than 15% for NOx, HC and CO. Further, a model application method was proposed, which can calculate the traffic exhaust pollutions in real time.