遥感法在机动车排放测试中的应用研究

A Research on the Application of Remote Sensing to Vehicle Emission Measurement

为对北京市现行的遥感测试法规增设HC和NO限值提供参考意见,进行了遥感监测设备的静态标准气体对比实验、遥感准确度与车速相关性实验和BASM5024工况法对比实验,结果显示:遥感法静态标准气体测试准确度高,均值相对误差不超过5%;车速低于40km/h时,CO和HC的遥感测量值变化不明显,但随着车速升高NO遥测值有一定的下降趋势;与BASM5024工况法对比的结果表明,CO和NO的遥测值和工况值具有较强的线性相关性,而HC却没有。因此,经大量实验验证后可增设NO的排放遥感限值。

For providing references on adding HC and NO limits in current remote sensing emission meas- urement regulation of Beijing municipality besides CO, a static standard gas comparative experiment using remote sensing monitoring device, a correlation experiment between remote sensing measurement accuracy and vehicle speed, and a comparative experiment on exhaust pollution values between remote sensing condition and BASM5024 driving mode condition are conducted. The results indicate that the static standard gas measurement using remote sensing method has a high accuracy with the maximum mean relative error not more than 5%, and when vehicle speed is less than 40km/h, the emission values of CO, HC and NO have no obvious change, while NO shows a cer- tain downward trend with the increase in vehicle speed. The results of comparative experiment between remote sens- ing condition and BASM5024 operating condition show that there are a rather strong linear correlation between two conditions for CO and NO, but not for HC, therefore it is appropriate to add NO emission limit in remote sensing regulation on the basis of validation by a large amount of experiments.