Heavy-duty vehicles have become one of the major NOx pollution sources in China,as well as a key contributor of motor vehicles'CO2 emissions.Therefore,controlling NOx and CO2 emissions from heavy-duty vehicles is the top priority in energy saving and emission reduction of motor vehicles.This paper investigated the real-road NOx and CO2 emission features of heavy-duty diesel vehicles by analysing the remotely monitored emission data of some typical China-5 and China-6 diesel vehicles.The results show that the real-road NOx emission level of China-6heavy-duty diesel vehicles is significantly lower than that of China-5 counterparts.However,the CO2 emission level is about 10％higher from China-6 heavy-duty vehicles than from China-5 counterparts.The 3B-MAW method for NOx emission analysis based on window power ratios can take into account not only the real-road emission characteristics of heavy-duty diesel vehicles,but also the technical features of SCR catalysts for NOx emission control,and is suitable for the evaluation of remote monitoring data of heavy-duty diesel vehicle emissions.
维普
万方数据