然而，汽车数量日益增加导致废气排放物增加以及产生交通噪音。
The increasing number of vehicles however leads to more exhaust emissions and traffic noise.
提出了红外光谱诊断技术用于诊断汽车废气排放物的温度和组分浓度。
A technology of infrared spectroscopy diagnoses is introduced for the flame temperature and species concentration of exhaust emission of vehicles.
在汽油机的燃烧过程中加入部分的氢气进行燃烧，可对发动机的性能改善和废气排放物的降低起到良好作用。
During the combustion process of gasoline engine, adding some hydrogen partly has good effect on improvement of gasoline engine performance and reduction of exhaust emissions.
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