基于IVE模型的杭州市机动车实际行驶工况下排放因子的研究

A Research on the Vehicle Emission Factors of Real World Driving Cycle in Hangzhou City Based on IVE Model

首先,利用台架试验对IVE模型中的基础排放率进行地域性差异的修正;然后,利用GPS系统获得杭州市机动车在不同道路类型和时间下的实际行驶工况;最后,应用修正后的IVE模型确定杭州市实际行驶工况下轻型车和出租车的CO和NOx综合排放因子。结果表明,对IVE模型基础排放率的修正能较好地提高模型的模拟精度;在杭州市区高峰期实际行驶工况下,轻型车CO和NOx综合排放因子分别是2.92和1.03g/km,出租车的排放因子分别为轻型车的2.0和1.7倍。

Firstly a correction for regional variation is conducted on the base emission factors of IVE model by bench test.Then the real world driving cycles of vehicles in Hangzhou City on different road and time are obtained with GPS system.Finally based on the corrected IVE model the combined emission factors of CO and NOx of light vehicles and taxis in real world driving cycle are determined.The results show that the correction on base emission factors can effectively improve the accuracy of IVE model.The combined emission factors of CO and NOx of light vehicles is 2.92 and 1.03g/km respectively in rush hours,and that for taxies is 2.0 and 1.7 times respectively as high as that for light vehicles.