直线发动机换气系统关键参数优化研究  

Optimization of Key Parameters of Scavenging System for Linear Engines

作　　者：傅煜[1] 王哲[1] 臧鹏飞 孙晨乐 

机构地区：[1]同济大学新能源汽车工程中心,上海201804

出　　处：《内燃机工程》2017年第5期120-126,共7页Chinese Internal Combustion Engine Engineering

基　　金：上海市科技技术委员会科研计划项目(14DZ1202802)~~

摘　　要：针对直线起动发电一体机(ISG)/发动机系统中的二冲程直线发动机,搭建了GT-Power一维简化模型,并对其换气系统关键结构参数包括扫气比时面值、排气比时面值和扫气箱容积进行仿真优化研究,从而改善换气品质,提高直线发动机性能。研究结果表明:经参数优化后的直线发动机扫气效率为88.15%,提高了1.58%;捕获率为59.38%,提高了28.81%;动力性和经济性也显著提升。A simplified one-dimensional model was built by the GT-Power for the two-stroke linear engine of a linear integrated starter generator （ISG） power system. The key structural parameters of the engine scavenging system, specific time-area values of scavenge and exhaust as well as the volume of scavenging box, were simulated and optimized in order to improve scavenging quality and the linear engine performance. Results show that the scavenging efficiency of the optimized linear engine reaches 88. 15% and the capture ratio 59. 38%, 1.58% and 28. 81 % higher than those of the original respectively, the power performance and fuel economy are both obviously improved as well.

关 键 词：直线发动机 换气系统 GT-POWER 模拟优化 

分 类 号：TK417[动力工程及工程热物理—动力机械及工程]