江苏大学学报（自然科学版）2016，Vol.37Issue(2)：155-161,7.DOI:10.3969/j.issn.1671-7775.2016.02.006
蒙特卡洛法在共轨系统可靠性分析中的应用
Application of Monte Carlo method in reliability analysis for common rail injection system
摘要
Abstract
To realize quantitative analysis of structural reliability in the process of common rail injection system (CRS)development,a ″leakage-shutting″failure model was established,and a structural reliability investigation was demonstrated based on Monte Carlo (MC)method.The model related to the fuel delivery limitation in restrictor and the fuel distribution in common rail injector,and the latter included fuel injection,fuel dynamic leakage and fuel clearance leakage of command-piston matching parts and nozzle needle matching parts.The parameters of random variables in model were obtained by statistical result of product sampling test.The calculation precision and feasibility of MC direct sampling method were compared with those of MC important sampling method.The results show that the calculation result of failure rate is 7.97 ×1 0 -5 by MC important sampling method.The failure rate is mainly influenced by several variables of limitation value of restrictor and working clearances of the two pairs of matching parts. The failure rate sensitiveness to working clearance standard deviation of nozzle needle matching parts is 3.1 times than that of command-piston matching parts.MC important sampling method is appropriate for CRS reliability analysis.关键词
共轨系统/蒙特卡洛法/可靠性/柱塞偶件/余隙泄漏/量化分析Key words
common rail injection system/Monte Carlo method/reliability/plunger matching parts/clearance leakage/quantitative analysis分类
能源科技引用本文复制引用
段炼,袁寿其,胡林峰,俞建达,夏兴兰..蒙特卡洛法在共轨系统可靠性分析中的应用[J].江苏大学学报（自然科学版）,2016,37(2):155-161,7.基金项目
国家自然科学基金重点资助项目（51239005）；国家科技重大专项 （）
