喷油脉宽和节气门开度对直线发动机性能的仿真研究  

A Simulation Analysis on the Free-Piston Engine Concerning the Injection Pulse Width and Air Throttle Angle

作　　者：胡玉岩[1] 王哲[1] 邓俊[1] 尹兆雷[1] 章桐[1] 

机构地区：[1]同济大学新能源汽车工程中心,上海201804

出　　处：《小型内燃机与摩托车》2012年第6期1-6,共6页Small Internal Combustion Engine and Motorcycle

基　　金：上海市科委资助项目(08DZ1207700);上海市重点学科建设项目(B303);国家自然科学基金(51006075)

摘　　要：基于直线发动机实验台架,建立了直线发动机的GT-Power仿真模型,并进行直线发动机样机实验,将实验数据与仿真结果进行对比,验证了仿真模型的正确性。基于验证的仿真模型,研究了直线发动机的燃烧特性,分析了各主要设计、控制参数对发动机起动性能的影响。结果表明:在节气门开度不变的情况下,喷油脉宽的大小直接影响发动机气缸内的缸压曲线,且随着喷油脉宽的增大缸内压力也不断增大;当喷油脉宽不变,节气门开度在10°～60°的范围内变化时,随着节气门开度的增大,直线发动机的缸内压力逐渐降低。This paper presents the method to build the model of liner engine and the simulation process based on the software of GT-POWER,which is then validated by the experimentation.The circulation characteristics of linear engine have been studied.The key parameters of design and control that affect the starting performance have also been analyzed.The simulation results show that,during the starting process of liner engine,once the injector delivery rate is fixed,the cylinder pressure will mount up as the injection pulse width increases.It also indicates that when the air throttle angle that is in the range from ten degree to sixty gets larger,the cylinder pressure of first circle descends.

关 键 词：直线发动机 GT-POWER 仿真研究 韦伯燃烧模型 

分 类 号：TK413.8[动力工程及工程热物理—动力机械及工程]