中文摘要：

用傅里叶变换紫外光谱法对4辆不同里程、不同排量、不同排放标准的轻型车NH3排放进行测量,试验车辆包括2辆双燃料出租车。实验结果表明：里程数越高的车辆,在同一个测试循环中产生的NH3排放越多;在高速工况下,车辆产生的NH3要高于在低速工况时;在循环中车辆加速过程产生的NH3浓度较高;对于天然气燃料车辆,市区运转工况下基本上没有NH3排放,在城郊运转工况下产生的NH3要多于用汽油燃料时。

英文摘要：

Fourier transform ultraviolet visible（ FTUV） was employed to measure the tailpipe ammonia emissions from 4 lightduty vehicles,including two gasoline/CNG dual fuel vehicles. The results demonstrated that more NH3 was generated in vehicles with more mileages,and NH3 was mainly produced in acceleration course which leads to higher concentration of NH3 in high load situations. Simultaneously,as for the CNG vehicle,less NH3 was produced in urban operating condition,while more NH3 was produced in suburban operating condition than that for gasoline vehicles.