基于功基窗口法的国六重型柴油车实际道路排放研究

利用便携式排放测试系统（PEMS）对6辆典型国六重型柴油车开展了实际道路排放试验，并利用功基窗口法分析了重型车实际道路CO、NOx和PN排放特性，结果表明：实际行驶过程中重型柴油车排放后处理装置能有效控制CO和PN排放，但NOx排放存在显著不确定性.现行重型国六排放标准规定的功基窗口法在排放评估过程中最高可剔除46.68%的NOx高比排放窗口，大幅低估了实际道路工况尤其是市区拥堵路况下的重型柴油车NOx实际排放量，建议采用更加科学合理的数据处理方法评价重型车实际道路排放.

Research on real driving emissions from China-VI heavy-duty diesel vehicles based on work-based window method

Six typical China-VI heavy-duty diesel vehicles were selected for the real driving emission test with Portable Emission Measurement System (PEMS), and the CO, NO_x, and PN emission characteristics of heavy-duty vehicles were evaluated by the work-based window method. The results showed that the emission aftertreatment devices of heavy-duty diesel vehicles could effectively control the CO and PN emissions under real driving conditions, but there was significant uncertainty in NO_x emission. Up to 46.68% of the high specific NO_x emission windows were removed from the real driving emission evaluation by the work-based window method adopted in the current China-VI emission regulation, which led to serious underestimation of real NO_x emissions from heavy-duty vehicles under real driving conditions, especially in urban traffic congestion. In the subsequent revision of the emission regulations, a more scientific and reasonable evaluation method should be introduced to evaluate the real driving emissions of heavy-duty vehicles.