基于车载远程监控的重型柴油车NO_(x)排放评估方法研究

Study on Evaluation of NO_(x)Emission from Heavy-duty Diesel Based on Vehicle Remote Monitoring

对某重型车的实际道路行驶过程中远程排放监控的NO_(x)数据和PEMS设备测试数据对比分析。结果表明,两者的一致性较好,远程监控的NO_(x)数据用于表征车辆实际道路的NO_(x)排放特征具备可信性和可行性。基于远程排放监控数据,使用短行程重构PEMS法,建立车辆工况曲线重构方法和基于功基窗口法的排放评估模型,对车辆在实际道路上的排放进行评估计算,并与PEMS测试结果对比验证。研究结果表明,该短行程重构模型能有效识别车辆排放变化和超标情况,可以作为国六标准在用重型车NO_(x)排放监控的新方法和手段。

The NO_(x)data from remote emission monitoring and PEMS test were compared and analyzed during actual road running of a heavy-duty diesel,and the results showed that they were consistent.The NO_(x)data from remote monitoring was reliable and feasible for characterizing NO_(x)emission characteristics on actual roads.According to remote emission monitoring data,the short trip reconstruction PEMS was used to establish vehicle operating condition curve reconstruction method and an emission evaluation model based on work-based window method.The vehicle emissions on actual roads were evaluated and calculated,and compared with PEMS test results for verification.The research results showed that the short trip reconstruction model could effectively identify changes in emissions and excessive emissions of vehicles,and could be used as a new method and means for monitoring NO_(x)emission from heavy-duty vehicles that met ChinaⅥemission standards.