用光纤燃烧传感器测量汽油机的燃烧时间参数

介绍了一个光纤燃烧传感器＋（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争光谱。光谱分析结果再次证实了燃烧火焰中ＣＨ（４３１．５ｎｍ），Ｃ２（５１６．ｎｍ），Ｈ２Ｏ３（５８９ｎｍ）等自由基的特征光谱同Ｃ粒子的热宫续光谱叠加在一起，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环变动大，与单色仪＋ＢＯＸ

Measurement of the Combustion Time Parameters of Gasoline Engine by Means of Optic Fiber Combustion Sensor

A measuring system consisting of the optic fiber combustion sensor and OMA4 multichannel spectral analyzer is presented in the paper and it has been applied to the measuring of the combustion flame spectrum of the gasoline engine.The spectral analysis results prove that the flame spectrum is formed by the adding together of the characteristic spectra of the free radial such as CH(431.5nm),C 2(516.4nm,H 2O(589nm) in the combustion flame and the continuous thermal radiation spectrum of particle C.The important time parameters such as ignition delay and burning lasting time in the combustion process of the gasoline engine can be determined according to the light intensity peak variation of H 2O in the spectral curves.Since the variation in the gasoline combustion cycle is large,compared with the measuring system consisting of monochromator and BOXCAR integral averaging device,the measuring system consisting of OMA4 multichannel spectral analyzer and optic fiber combustion sensor has the advantages of high measuring accuracy and operating efficiency in measuring the flame spectrum of gasoline engine.