用光学法对汽油机燃烧循环变动的测量和评价  

Measurement of combustion cyclic variation and its evaluation in a gasoline engine using the optical method

作　　者：薛敏霞[1] 盛凯夫[1] 程勇[2] 王建昕[2] 

机构地区：[1]华中科技大学机械科学与工程学院 [2]清华大学汽车安全与节能国家重点实验室

出　　处：《华中科技大学学报（自然科学版）》2002年第6期28-30,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目 (5 95 760 2 5 )

摘　　要：研制了一种光纤燃烧传感系统 ,用以测量汽油机燃烧火焰光谱 .试验中测量了 43 1nm (CH) ,5 16nm(C2 )及 5 88nm(H2 O)三种特征谱线在不同工况下的光强变化曲线 .并提出了一种新的评价燃烧循环变动的方法 ,即用光变化曲线的特征参数来评价 .试验结果表明 ,光强变化曲线能够反映燃烧过程进行的好坏及燃烧的时间特性 ,可以用来进行燃烧循环变动的评价 .An optical fiber combustion sensing system used to measure the combustion emission spectra in a gasoline engine is introduced. In the experiment, the curves of luminous intensity variations of three characteristic spectra 431?nm(CH), 516?nm(C 2) and 588?nm(H 2O) under different operating conditions are measured. A new evaluation method of combustion cyclic variation is proposed, which is the characteristic indices of luminous intensity. The results show that the obtained curves reveal the goodness of actual combustion process, and the time characteristics of combustion can be displayed on these curves. The curves can be used to evaluate the cyclic variation of combustion.

关 键 词：光学法 汽油机 燃烧循环变动 测量 评价 

分 类 号：TK411.2[动力工程及工程热物理—动力机械及工程] TK417