摘要
基于蒙特卡罗方法编写了汽油机压缩比统计分析程序,分别采用正态抽样、平均抽样、模拟和检测混合抽样3种方式,模拟计算了某款现生产自然吸气汽油机理论控制最佳、最差和实际生产情况的压缩比公差,并分析了压缩比尺寸链各相关公差对压缩比公差的影响。分析结果表明,对研究机型而言,理论上燃烧室容积公差对压缩比公差的影响达到35%,而实际燃烧室容积散差较大,其对压缩比实际公差的影响更大。最后批量抽检了现生产缸盖和缸体部分的容积样本进行了压缩比公差统计分析,与混合抽样方式计算结果进行了对比,两者结果基本一致。
Statistics analysis program of gasoline engine compression ratio tolerance is written based on Monte Carlo Method. For a mass production gasoline engine,three kinds of sampling method,including normal sampling,uniform sampling,hybrid sampling,are utilized to analyze the best and the worst limit of its design and actual compression ratio tolerance respectively. The effect of the design tolerance of each factor on the compression ratio tolerance is analyzed. The result shows that,the effect of combustion chamber volume tolerance on compression ratio can reach 35%,and for the actual situation,the tolerance of the combustion chamber volume is highly scattered. Finally,actual measurement of the combustion chamber volume is made to investigate compression ratio tolerance at mass production level,and the result agrees with the analysis result by hybrid simulation method well.
出处
《小型内燃机与摩托车》
CAS
2014年第4期58-63,共6页
Small Internal Combustion Engine and Motorcycle
基金
国家科技支撑计划(2011BAG06B00)
关键词
蒙特卡罗
压缩比公差
统计分析
汽油机
Monte Carlo
Compression ratio tolerance
Statistics analysis
Gasoline engine
