基于尾气射流的发动机寿命预测模型  

Based on Gas Jet on the Prediction Model of Cylinder Life

作　　者：耿端阳[1] 董越波[1] 张庆峰[1] 

机构地区：[1]山东理工大学农业工程与食品科学学院,山东淄博255049

出　　处：《农机化研究》2011年第10期187-190,共4页Journal of Agricultural Mechanization Research

基　　金：国家自然科学基金项目(9001-107027)

摘　　要：通过对汽车尾气高速摄影图像的分析,发现了同一转速下尾气射流贯穿距离随发动机行驶里程的变化规律,并根据实测数据,采用MATLAB技术对其进行了幂函数模型回归,通过拟合优度评价指标决定系数R2、误差平方和(SSE)及误差均方根(RMSE)对其检验,结果表明:该模型能够很好地描述同一型号发动机在同一转速时不同行驶里程下的尾气射流运动过程,为采用尾气射流贯穿距离预测发动机动力特性和寿命奠定了基础,也为确定发动机预防维修任务提供了依据。The regression analysis of power model was determined by the MATLAB software.The measured data of the model that was in the same engine speed about the jet penetration and the cylinder life derived from the dynamic pictures by means of high speed camera system was used as measured samples.The model was detected by coefficient of determination（R2）,square sum error（SSE） and root mean square error（RMSE）.The results showed that： this power model could be a good description to the process of jet which was at the same engine speed and the different cylinder life with respect to the same type of engine.It established the basis for the prediction of power characteristics and engine life,moreover,supplied the evidence for the prevention maintenance tasks to the engine.

关 键 词：发动机 寿命 预测模型 尾气射流 贯穿距离 

分 类 号：TK438[动力工程及工程热物理—动力机械及工程]