夏利2000发动机稀薄燃烧电控系统ECU的硬件设计.pdf

维普资讯
第 38卷第 3期天津大学学报
2005年 3月 University Tianjin of Journal (x】5
基于控制的稀薄燃烧汽油机进气模型
王莉,刘鲁源,刘德新,刘书亮
(,天津 300072;,天津 300072)
摘要:提高电控汽油机空燃比控制精度是改善发动机燃油经济性、
薄燃烧汽油机的工作原理及其排放控制要求,提出了改进的基于发动机物理模型的稀薄燃烧汽油机空燃比的控制
,利用自行研制的发动机电控系统,采用最小二乘法对模
型的主要参数进行辨识,,进气管时间常数是发动机转速
和节气门开度的函数,节气门开度越大,时间常数越小.
关键词:汽油机;稀薄燃烧;空燃比;进气模型;最小二乘法;参数辨识
中图分类号: 文献标志码:A 文章编号:0493·2137(2005)03·0201—05
Control-Based Intake AirflowDynamics Model
ofLean Burn Gasoline Engine
W ANG Li ,LIU Lu—yuan ,LIU ,LIUShu—liang
( of Electrical Engineering and Automation,Tianjin University,Tianjin 300072,China; Automation,Tianjin andUniversity,Tianjin Engineering Electrical ( of
bustion Laboratory-,Tianjin University,Tianjin 300072,China) University,Tianjin Laboratory-,bustion
Abstract:Enhancing the uracy an is importantengine of ratio method air—fuel improveto fuelthe
economy and powering andability reduce the tail of improved model based on ratio air—fuel
control hascontrol structure been developed according totherunning theory and emission control requirement of lean
burn gasoline concerned intake airflow dynamics model is described in in en· described the dynamicsmodel