基于遥感尾气监测的柴油车气态污染物排放因子计算方法研究

采用遥感尾气测试系统实测了柴油车在实际道路工况下的CO、HC和NO排放特征，修正了排放因子的计算方法，并与车载排放测试系统（PEMS）实测结果进行了验证，获得了实测车辆的CO、HC和NO排放因子.测试结果显示，在各种遥感监测的工况下柴油车尾气中均含有较高浓度的氧气，未考虑氧气影响的燃烧方程反演获得的各污染物体积浓度计算值与PEMS实测值的偏差较大，且氧气浓度越大，偏差越大.经过氧气修正的燃烧方程反演计算的尾气浓度与PEMS实测值吻合度大幅提升，适用于实际工况下遥感检测车辆尾气的反演计算.修正算法得到CO、HC和NO的排放因子离散性较小，精确度较高，可以为量化柴油车尾气排放贡献提供科学依据.

Determination of gaseous pollutant emission factors from diesel vehicles based on remote sensing exhaust gas monitoring

We applied a remote sensing exhaust gas test system to measure the CO, HC, and NO emissions from diesel vehicles in real-world conditions, and then modified the calculation method to determine the emission factors. A Portable Emission Measurement System (PEMS) was used to validate the emission factors after correction. The results show that the exhaust gas from diesel vehicles under different driving conditions contains high concentrations of oxygen. The inverted concentration of each pollutant in the exhaust by a combustion equation inversion model without oxygen concentration has large deviation with the PEMS result. The deviation is larger when oxygen concentration is higher. After corrected by oxygen, the consistency of inverted concentration in the exhaust with PEMS result is greatly improved. The corrected emission factors have less dispersion and higher accuracy, which can provide an important support for quantifying the contribution of diesel vehicle emissions.