摩托车实际道路行驶特征排放测试循环的合成研究

Synthesis of Motorcycle Emission Test Cycle Based on Real-Road Driving Conditions

为考察WMTC(world-wide motorcycle test cycle)排放测试循环在中国的适应性,利用在天津和济南所采集的摩托车实际行驶的路谱数据,基于自行设计的准则数评价体系,建立了表征中国摩托车道路行驶特征的排放测试循环.研究结果表明,合成循环的各种模式比例特征与WMTC比较接近,但各种速度特征,包括最高车速和各种模式的平均速度及总体平均速度则存在明显差异.两种摩托车的测试循环表明合成循环的HC和CO排放因子高于WMTC测试循环,但是其NOx的排放因子却小于WMTC测试循环.同时,为给出WMTC测试循环对中国实际道路行驶特征的适应性的明确结论,大规模的针对不同城市不同实际道路行驶路谱数据的采集分析是必要的.

To evaluate the adaptability of world-wide motorcycle test cycle （WMTC） to China, a new motorcycle emission test cycle which can indicate the driving characteristics of motorcycles in the real-road conditions was established. The research work was carried out based on the measuring results obtained from driving data of motorcycles in several typical Chinese cities （ including Tianjin and Jinan） and the standard value of the selfdesigned appraisal system. It is shown that there do exist some differences between the driving characteristics of synthesized cycle and WMTC, especially the maximum speed, mean speed and mean running speed. The emission tests of motorcycles under the above two emission cycles indicate that the emission factors of HC and CO under the synthesis cycle are higher than those of WMTC, whereas the factors of NOx are smaller. The results imply that in order to give reliable conclusion about the adaptability of WMTC, a huge number of driving data sampled from different roads of different cities may be still needed.