摘要
分析比较了火花点火发动机循环变动的评价方法 ,并提出了用各个曲轴转角下的压力变动率曲线表示压力循环变动的方法。结果表明 ,平均指示压力的标准差及变动率是评定内燃机压力循环变动的最佳参数 ;各个曲轴下的压力标准差及变动率曲线可以清楚地表示出发动机工作过程中各个曲轴转角下的压力变动情况 ;进气过程中也存在压力变动 ,其压力变动率高于燃烧过程 ;
The methods of evaluation on pressure cyclic variation in a spark ignition engine are studied in this paper.The results show that standard deviation and coefficient of variation of indicated mean effective pressure are the best parameters.The situation of pressure cyclic variation can clearly express with the circumstance of standard deviation and coefficient of pressure cyclic variation at each crank angle.There is a peak value of coefficient of pressure cyclic variation in combustion process.Pressure cyclic variation begins from intake process.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
2000年第2期171-174,共4页
Transactions of Csice
关键词
火花点火发动机
汽油机
循环变动
压力变动
Spark ignition engine
Cyclic variation
Evaluation method
Combustion pressure
