电控单体泵喷油压力升高率预测模型  

Prediction model of the fuel injection pressure rise rate for an electronic unit pump

作　　者：白云[1] 范立云[1] 马修真[1] 刘鹏[1] 李清[1] 

机构地区：[1]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2015年第7期932-937,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51279037;51379041;51475100);中央高校基本科研业务费专项基金资助项目(HEUCF13);教育部科学技术研究资助项目(113060A)

摘　　要：针对电控单体泵系统喷油压力升高率与其影响因素间的响应关系,制定了喷油压力升高率特性的实验研究方案。运用偏最小二乘法进行多元回归分析,得出凸轮型线速率、柱塞直径、高压油管长度、高压油管直径、弹簧预紧力和喷孔流量系数与喷油压力升高率的多元二次预测模型。对比结果表明:喷油压力上升阶段和下降阶段的平均压力升高率计算值与预测模型预测结果最大偏差分别为1.76%和4.69%,最大压力升高率和最小压力升高率计算值与预测模型预测结果最大偏差分别为8.41%和2.55%。In order to obtain the response relation between injection pressure rise rate and influence factors of an electronic unit pump,an experiment for the injection pressure rise rate characteristics was designed. By the partial least square regression analysis method,a multiple quadratic prediction model was derived,which shows the relation between the injection pressure rise rate and the cam profile velocity,plunger diameter,length of high pressure fuel pipe,diameter of high pressure fuel pipe,pre-tightening force of spring,and orifice flow coefficient. The results showed that in the injection pressure rising and the declining segments,the maximum errors of calculated values and predicted values of pressure rise rate are 1. 76 % and 4. 69 %,respectively. The maximum error of calculated values and predicted values of maximum and minimum pressure rise rates are 8. 41 % and 2. 55 %.

关 键 词：电控单体泵 喷油系统 压力升高率 多元回归分析 实验设计 预测模型 

分 类 号：TK421.4[动力工程及工程热物理—动力机械及工程]