增压双VVT汽油机缸内充量工程化建模方法  

Study on In-Cylinder Charge Modeling Method of a Turbocharged Dual VVT Gasoline Engine

作　　者：孙鹏远[1] 王强[1] 苍贺成 龙立 李家玲 Sun Pengyuan;Wang Qiang;Cang Hecheng;Long Li;Li Jialing(Intelligent Connected Vehicle Development Institute,China FAW Group Company Limited,Changchun 130000,China)

机构地区：[1]中国第一汽车集团公司智能网联开发院,吉林长春130000

出　　处：《内燃机学报》2022年第4期314-321,共8页Transactions of Csice

摘　　要：针对由涡轮增压和进/排气双可变气门正时(VVT)构成的复杂进气系统,以缸内直喷汽油机为研究对象,采用对比态原理,通过理论推导和数据分析,提出了可变气门正时权重因子的概念,并对构成缸内充量的各种气量进行了机理-数据混合工程化建模.结果表明:该建模方法能够准确计算缸内新鲜充量和扫气量,用进/排气气门角度全因子扫描时,94%以上的数据点计算误差小于±5%;用目标进/排气气门角度进行数据验证时,全部数据点计算误差小于±5%;满足车辆应用对发动机充气模型的计算精度要求.An engineering-based model was established to predict the in-cylinder charge quantity at every valve phase for a gasoline engine with a complex gas exchange system which is composed of a turbocharger and duel variable valve timings(VVT)on both intake and exhaust.A concept of VVT weight factor was proposed in the model based on the principle of comparative state,theoretical derivation and data analysis.The results show that the modeling method can accurately calculate the in-cylinder fresh charge and scavenging volume.When the full factor across the intake and exhaust valve angles is used,the calculation error of more than 94%data points is less than±5%.When the target intake and exhaust valve angles are used for data verification,the calculation error of all data points is less than±5%.These results meet the requirements of vehicle application for the calculation accuracy of engine charging model.

关 键 词：汽油机 缸内充量 可变气门正时 涡轮增压 扫气 

分 类 号：TK411.3[动力工程及工程热物理—动力机械及工程]