用点火电极进行缸内过量空气系数的试验研究  

Experiments on the Relative Air/Fuel Ratio in a Cylinder Detected by Ignition Electrodes

作　　者：吴筱敏[1] 吴仪[1] 杜卫宁[1] 廖世勇[1] 蒋德明[1] 杨中乐[1] 

机构地区：[1]西安交通大学能源与动力工程学院汽车系,西安710049

出　　处：《内燃机工程》2006年第5期29-32,共4页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金项目(50276049)

摘　　要：通过在定容燃烧弹中对点火电极附近离子信号与过量空气系数的研究,证明了无论是信号峰值还是到达峰值所用时间均与过量空气系数有关。试验表明,由火焰前锋和火焰后区两部分组成的离子信号峰值当过量空气系数为1时均达到极大值,偏离1时均减小,而从点火到达两信号峰值所用时间随过量空气系数的变化却完全相反,无论是火焰前锋还是后区其信号峰值均随预混压力的升高而增加,而火焰后区的信号峰值总是大于前锋的值。By detecting both ionic signal in the vicinity to ignition poles and relative air-fuel ratio at constant volume combustion bomb, it was show that the relative air/fuel ratio was influenced by both peak values and time intervals from ignition to both peaks. Experiments showed that the peak values of signal in both flame-front and post-flame are maxima when the relative air/fuel ratio is 1, and the values decrease when it departsfrom 1. But both time intervals are minimal when the relative air/fuel ratio is 1. The both values increase as pre-mixture pressure, and peak value in the post-flame is always larger than the value in the flame-front.

关 键 词：内燃机 离子信号 过量空气系数 定容燃烧弹 信号峰值 

分 类 号：TK411[动力工程及工程热物理—动力机械及工程]