摘要
利用自主研发的火花塞离子电流信号采集与分析系统,在1台4行程,4气门的丰田8A发动机上,采集了3种负荷下不同空燃比的火花塞离子电流信号,分析研究了空燃比与火花塞离子电流信号的3个典型特征参数的相关性。结果表明,离子电流信号的峰值(Ip)、信号对时间的积分值(S)及信号延续期(Tms)等特征参数值在空燃比为13左右时呈现最大值,而当混合气变稀或变浓时,这些特征参数值都将有不同程度的降低。
The relativity of air-fuel ratio to three typical characteristic parameters was analyzed and researched by sampling different air-fuel ratio spark plug ionic current signals on a four-stroke four-valve Toyota 8A model engine under three different loads with self-developed signal collection and analysis system. The result shows that the three characteristic parameter values, which are the ionic current signal peak value（ Ip ）, the signal integral value（ S ） with time and the signal continuing period （Tms）, reach the maximum when the air-fuel ratio is 13 and will decrease to different extent when the mixture becomes lean or rich.
出处
《车用发动机》
北大核心
2008年第4期74-76,共3页
Vehicle Engine
基金
天津市应用基础研究计划项目(06YFJMJC06400)
关键词
离子电流
信号测量
空燃比
特征参数
相关性
ionic current
signal measurement
air-fuel ratio
characteristic parameter
relativity
