发动机电磁气门驱动过渡过程的闭环控制  

Closed-Loop Control on Transition of Electromagnetic Valve Actuation for Engines

作　　者：王秋华[1] 赵雨东[1] 

机构地区：[1]清华大学汽车安全与节能国家重点实验室,北京100084

出　　处：《内燃机学报》2007年第1期84-89,共6页Transactions of Csice

基　　金：国家自然科学基金项目(50175055)

摘　　要：以一个发动机电磁气门驱动(EVA)装置为对象,采用试验方法研究EVA过渡过程。根据EVA的过渡过程工作特点,把过渡过程分为远程、近程两段分别予以控制。远程采用PI控制,控制目标是在远程结束时励磁线圈达到某一电流;近程则采用跟踪位移理想曲线的方法,使落座速度降低。通过试验确定了远程阶段的目标电流和PI控制参数、近程阶段的理想位移曲线和控制点数目,使单次上下行过渡过程落座速度分别达到了0．22m/s和0．10 m/s,实现了EVA连续动作且可使EVA动作适应转速变化。Transitional process of an electromagnetic valve actuation （EVA） is studied with experimental method to reduce valve seating velocity. According to the features of EVA transitional process, the process can be divided into the far-transition stage and near-transition stage and to make them to be controlled respectively. PI methods are used in far transitional control to make a certain coil current at the end of fartransition stage. While closed-loop control of valve displacement is adopted to track an ideal curve for a minimum seating velocity in near transitional control. The setting current and PI parameters for far transition and ideal curve and the number of track points are determined by experiment, and valve seating velocity of 0.22 m/s and 0.1 m/s are achieved for up transition and down transition, respectively. Based on this control, the EVA can operate continuously and meet engine speed variation.

关 键 词：汽车发动机 气门机构 可变气门驱动 电磁气门驱动 闭环控制 

分 类 号：TK413.4[动力工程及工程热物理—动力机械及工程]