发动机EGR和VNT执行器系统仿真  

Actuator System Simuliation for Engine EGR/VNT

作　　者：李宏键[1] 姚正军[1] 陈立钦[1] 

机构地区：[1]河北华北柴油机厂,河北石家庄050081

出　　处：《车用发动机》2007年第2期44-47,共4页Vehicle Engine

摘　　要：真空执行器大量应用于EGR和VNT系统,为改善空气系统控制效果,研究了一种EGR和VNT执行器系统模型。该模型包括空气系统与机械执行器系统两个主要部分:前者可采用孔口节流方程模拟,其开度函数可通过MAP图获得以简化模型;后者可视为“质量——弹簧”系统。试验结果表明,该模型能精确地模拟快变和慢变控制过程,可用于发动机空气系统建模及其控制算法,为该类系统的商业化应用奠定了基础。This paper presents a method for a EGR/VNT actuator system. This model includes two parts： air system and mechanical actuator system. The air system is simulated through orifice flow equation, and its opening function is calculated through map to simplify the model; the mechanical actuator system is treated as ＇mass-spring＇ system. The experiment shows that this model can simulate the quick action and slow action control processes accurately, and can be used in engine air system modeling and control strategy.

关 键 词：内燃机 废气再循环 可变喷嘴涡轮 执行器 模拟 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]