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本文介绍了一个光纤燃烧传感器及ＯＭＡ４光多通道分析仪组成的测量系统，用以测量汽油机燃烧火焰光谱。光谱分析结果再次证实了燃烧火焰中ＣＨ（４３１．５ｎｍ），Ｃ２（５１６．５ｎｍ），Ｈ２Ｏ（５８９ｎｍ）等自由基的特征光谱同Ｃ粒子的热辐射连续光谱叠加在一起，构成了火焰光谱。根据光谱曲线中Ｈ２Ｏ光强峰值变化，可以确定汽油机燃烧过程中重要的时间参数：着火延迟期和燃烧持续期。由于汽油机燃烧循环变动大，与单色仪和ＢＯＸＣＡＲ积分平均器组成的测量系统相比，光纤燃烧传感器＋ＯＭＡ４用光多通道分析仪系统测量汽油机燃烧火焰光谱，测量精度高，工作效率高。
This article presents a measurement system consisting of an optical fiber combustion sensor and an OMA4 optical multichannel analyzer to measure the combustion flame spectrum of a gasoline engine. The results of spectral analysis again confirmed that the characteristic spectra of CH (431.5nm), C2 (516.5nm), H2O (589nm) and other free radicals in the combustion flame were superposed with the continuous thermal radiation of C particles to form the flame spectrum. According to the change of the peak value of H2O light intensity in the spectral curve, it is possible to determine the important time parameters during the combustion of the gasoline engine: the ignition delay and the combustion duration. Compared with the monochromator and BOXCAR integral averaging system, the optical fiber combustion sensor + OMA4 optical multi-channel analyzer system measures the combustion flame spectrum of the gasoline engine because of the large variation of the combustion cycle of the gasoline engine. The measurement accuracy is high and the working efficiency is high.