基于喷油器模型的2.0 T直喷汽油机喷油控制系统开发  

Development of fuel injection control system for 2.0 T direct injection gasoline engine based on fuel injector model

作　　者：闫凯 杨帅[1] 付亚豪 陈以林 刘海峰[1] 吴名芝 马博尚 YAN Kai;YANG Shuai;FU Yahao;CHEN Yilin;LIU Haifeng;WU Mingzhi;MA Boshang(Automotive School Studies,Tongji University,Shanghai 200240,China;Zhejiang Xinchai Co.,Ltd.,Xinchang 312500,Zhejiang,China;Nanchang Automotive Institute of Intelligence and New Energy,Nanchang 330052,Jiangxi,China;Great Wall Motor Co.,Ltd.,Baoding 071000,Hebei,China;Hebei Automotive Engineering Technology Research Center,Baoding 071000,Hebei,China)

机构地区：[1]同济大学汽车学院,上海200240 [2]浙江新柴股份有限公司,浙江新昌312500 [3]南昌智能新能源汽车研究院,江西南昌330052 [4]长城汽车股份有限公司,河北保定071000 [5]河北省汽车工程技术研究中心,河北保定071000

出　　处：《柴油机设计与制造》2023年第4期1-7,共7页Design and Manufacture of Diesel Engine

摘　　要：以直喷发动机喷油器研究对象,分析了多域流量特性,根据其工作特性建立了喷油器模型,将不同的喷油过程分为弹道区、线性区和过渡区,用于计算喷油脉宽;依据现代软件开发流程结合Simulink平台建立了变结构控制算法并进行了封装测试;依据喷油器流量测试结果对控制模型进行了标定。结果表明:该控制策略实现了低流量区域和过渡区域的喷油偏差率保持在5%以内,高流量区域的喷油偏差率保持在3%以内。Taking the direct injection engine injector as the research object,the multi-domain flow characteristics were analyzed,and the injector model was established based on its operating characteris⁃tics.The different injection processes were divided into ballistic region,linear region and transition re⁃gion for calculating the injection pulse width.Secondly,according to the modern software development process and Simulink platform,the variable structure control algorithm was established and tested.Fi⁃nally,the control model was calibrated according to the fuel injector flow test results.The result shows that the injection errors of low flow area and transition area are both less than 5%,and the injection error of high flow area is less than 3%.

关 键 词：直喷发动机 喷油器 喷油偏差率 过量空气系数 控制策略 

分 类 号：TK411[动力工程及工程热物理—动力机械及工程]