世界摩托车排放测试循环中国适应性研究

Applicability of WMTC in China

中国在世界摩托车排放测试循环(WMTC)建立过程中所提供的实际道路路谱数据总量偏低,为此,对WMTC测试循环对中国实际道路的适应性进行了研究.利用一辆125 mL排量的摩托车,构建了描述车辆行驶特征的准则数体系,研究了WMTC测试循环的行驶特征及其与中国摩托车实际道路行驶特征的差异.结果表明,虽然实测路谱数据的各种模式比例特征与WMTC测试循环较为接近,但是各种速度特征,特别是平均速度和平均运行速度等与WMTC存在比较明显的差异.这种差异对于车辆的实际道路排放特性有显著影响,表明对WMTC测试循环进行必要的修正是应用该测试循环作为标准测试循环的前提.

Due to the low percentage of the testing data on real-road provided by China in the establishment of world-wide motorcycle test cycle（WMTC） , it is necessary to study in detail the adaptability of WMTC to the real-road condition of China. The experiment was carried out using a motorcycle with an engine of 125 mL displacement, and the criterion numbers system describing the driving property of vehicles was constructed. Also the different of driving property between WMTC and real-road condition in China was investigated. The analytical results indicate that though the proportions of all the driving modes of the experimental data are similar to those of WMTC, all the criterion numbers concerning to the speed of motorcycle, especially average speed and average driving speed ,are rather different, which means that the emission values of motorcycles obtained from the laboratory by WMTC cannot agree well with the real-road emission values of motorcycles in China. Correction to WMTC is needed before it is taken as the standard emission test cycle of China.