增压汽油机进排气系统结构参数对燃烧参数影响分析  

Analysis of The Impact of Structural Parameters of Intake and Exhaust System on Combustion Parameters in A Turbocharged Gasoline Engine

作　　者：胡鹏 HU Peng(Chery Jetour Automobile Co.,Ltd.,Wuhu 241009,China)

机构地区：[1]奇瑞捷途事业部,安徽芜湖241009

出　　处：《内燃机》2023年第3期31-35,共5页Internal Combustion Engines

摘　　要：基于已建立的2.0L增压汽油机热力学循环模型,通过仿真分析探讨了进排气系统结构对发动机热力学循环参数和增压器的匹配影响。研究结果表明,该机型推荐的进排气系统参数如下:压气机前管路压损为4kPa,中冷器管路压损为10kPa,进气道流量系数为0.330,排气道流量系数为0.418,进气岐管长度为260mm,排气岐管管径为32mm,排气背压为50~55kPa。研究结果还表明:发动机进排气系统的压力相关结构参数与增压机参数之间的协同控制具有重要意义,其协同性明显影响换气功和燃烧参数。Based on the established thermodynamic cycle model of a 2.0L turbocharged gasoline engine,this study conducted a simulation analysis to investigate the influence of the intake and exhaust system structure on the thermodynamic cycle parameters and turbocharger matching.The research results indicate that the recommended intake and exhaust system parameters for this engine model are as follows:the pressure loss in the pre-compressor pipeline is 4 kPa,the pressure loss in the intercooler pipeline is 10 kPa,the intake duct flow coefficient is 0.330,the exhaust duct flow coefficient is 0.418,the length of the intake manifold is 260 mm,the diameter of the exhaust manifold is 32 mm,and the exhaust back pressure is 50-55 kPa.The coordinated control of pressure-related structural parameters in the engine's intake and exhaust system and the turbocharger parameters is of great significance,and their coordination significantly affects scavenging efficiency and combustion parameters.

关 键 词：增压汽油机 进排气系统压损 仿真优化 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]