钟祥麟，李腾腾，于全顺，张超，刘麟

中汽研汽车检验中心（天津）有限公司，天 津  300300

摘要：为研究城市车辆低速、平均负载低的固有驾驶特征对便携式排放测试系统（portable emission measurement system,PEMS）试验结果的影响，对不同车速、载荷工况开展PEMS试验。结果表明：车速对发动机排温、功基窗口平均功率百分比和窗口比排放的影响大于载荷的影响；在满足国家排放标准要求的前提下，合理提高车速和增加载荷可以保证城市车辆的PEMS试验结果满足排放标准要求，同时驾驶方式应采用合理的换挡策略。该研究可以为城市车辆如何更好满足现行标准的PEMS测试要求提供参考。

关键词：城市车辆；PEMS；车速；载荷；排放

Abstract：In order to study the influence of the inherent driving characteristics of urban vehicles with low speed and low average load on the test results of portable emission measurement system (PEMS), PEMS tests are carried out at different vehicle speeds and load conditions. The results show that the influence of vehicle speed on engine exhaust temperature, power ratio and window specific emission is greater than that of load. Under the requirements of national emission standards, reasonable increase of vehicle speed and load can ensure that the PEMS test results of urban vehicles better meet the requirements of emission standards. At the same time, unreasonable gear shifting strategies should be avoided as far as possible in driving mode. This study can provide reference for how to better meet the PEMS test requirements of current standards for urban vehicles.

Keywords:urban vehicle;PEMS;vehicle speed; load;emission