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利用PEMS对北京市16辆轻型汽油车进行了排放测试,分析了机动车比功率VSP对CO2的排放影响.在此基础上,同时考虑排放速率和排放分担率两种因素,按CO2排放特性对VSP区间重新划分.新划分区间的排放率最小值为0.5587g.s-1,最大值为3.4013g.s-1,排放分担率最小值为4.61%,最大值为14.17%.此外,VSP=0的数据排放率为0.5587g.s-1,低于周围区间,分担率为14.17%,与其它区间相当,因此,其被划入独立区间.接着,引入速度及发动机负荷ES两个参数,对VSP区间进行再划分,分别分为30个排放区间.最后,通过北京不同类型道路排放实例进行验证,发现针对快速路和非快速路而言,MOVES预测误差分别为11.43%,14.34%,IVE为12.23%,15.53%,新VSP划分方式为10.05%,12.57%,新VSP-速度组合区间的划分方式为9.10%,11.56%,新VSP-ES组合区间的划分方式为9.90%,12.23%,其中,新VSP-速度组合区间的划分方式误差最小.
The emission test of 16 light gasoline vehicles in Beijing was carried out by PEMS, and the effect of vehicle VSP on CO2 emission was analyzed. Based on these, two factors of emission rate and emission sharing rate were considered, VSP interval re-division of the new division of the minimum emission rate of 0.5587gs-1, the maximum value of 3.4013gs-1, the minimum emission sharing rate of 4.61%, the maximum value of 14.17%. In addition, VSP = 0 data emissions The rate is 0.5587gs-1, lower than the surrounding area, the sharing rate is 14.17%, which is equivalent to other sections, so it is divided into independent sections.Secondly, the VSP section is subdivided by introducing two parameters of speed and engine load ES , Which are respectively divided into 30 discharge sections.Finally, through the validation of different types of road discharge cases in Beijing, it is found that the prediction errors of MOVES are 11.43%, 14.34%, 12.23% and 15.53% respectively for expressway and non-expressway, , The new VSP-segmentation method is 10.05% and 12.57%, the new VSP-speed segmentation interval is 9.10% and 11.56%, and the new VSP-ES segmentation interval is 9.90% and 12.23% respectively. Among them, the new VSP-speed Combination of the interval of division of the smallest error.