汽油机排气成分的连续测量分析

Continual Measurement and Analysis of Exhaust Composition of a Gasoline Engine

摘要: 测量并分析了点燃式发动机起动、加速及若干稳定工况运行时排气中CO₂、CO、HC、NO、O₂的体积成分.结果表明:在发动机起动时,CO排放曲线上有一个峰值存在,在加速时,有一个峰谷存在;在排气的各成分中,HC的变化幅度较大;在发动机处于宏观稳定工况时排气中各成分亦呈现出一定波动.CO₂、CO、HC、NO、O₂的波动系数的变化分别为0.007~0.020、0.049~0.288、0.l~0.883、0.03~0.077、0.024~0.123.

Abstract: The volumetric component of CO₂, CO, HC, NO and O₂ in exhaust of spark ignition engine was continually measured and analyzed under the condition of its starting, acceleration, and some steady modes. The results show that: (l) There is a peak value on the curve of CO emission at the starting of engine. (2) The variation of HC is the largest among the exhaust compositions. (3) The coefficients of CO₂, CO, HC NO and O₂ present a proper order, which are sequently 0.007-0.020, 0.049-0.288, 0.1-0.883 0.03-0.077 and 0.024-0.123, while engine is in steady operating mode macrographically.