摘要
为深入研究多孔高压汽油直喷(gasoline direct injection,GDI)喷射器在冷喷射和闪蒸条件下的喷雾特性,选用GDI喷油器,自制高压喷油控制系统,搭建了喷雾定容室试验平台,对3种典型闪蒸条件下的喷雾特性进行了燃油喷射过程实时控制试验,研究了不同喷射压力下乙醇汽油闪蒸喷雾的二维宏观形态和三维空间结构的演变特征。结果表明:闪蒸喷雾的结构主要由环境压力和燃油温度决定;较低的大气压力与较高的燃料温度都会加速闪蒸过程;较高的喷射压力使喷射过程更快、喷雾穿透延长、坍塌程度降低,较低的喷射压力使喷射过程的尖端穿透力较高。得出结论:通过揭示多孔GDI喷射器的闪蒸喷雾的形成规律,可为改善车用发动机性能提供技术参考。
In order to deeply study the spray characteristics of porous gasoline direct injection(GDI)engine injector un-der the conditions of cold injection and flash evaporation,a constant volume spray chamber test platform was built with GDI injector and self-made high-pressure fuel injection control system.The real-time control experiments of fuel injec-tion process were carried out for the spray characteristics under three typical flash evaporation conditions.The evolution characteristics of the two-dimensional macro morphology and three-dimensional spatial structure of ethanol gasoline flash spray under different injection pressures were studied.The results show that the structure of flash spray is mainly de-termined by ambient pressure and fuel temperature;lower atmospheric pressure and higher fuel temperature will acceler-ate the flash evaporation process;the higher the injection pressure,the faster the injection process,the longer the spray penetration and the lower the collapse degree,and the lower the injection pressure,the higher the penetration force at the tip of the injection process.It is concluded that the formation law of the flash spray of the porous GDI injector can pro-vide a technical reference for improving the performance of the vehicle engine.
作者
刘成
王付远
潘金元
LIU Cheng;WANG Fuyuan;PAN Jinyuan(School of Automotive Engineering,Anhui Vocational and Technical College,Hefei,Anhui 230011,China;Chery Automobile Co.,Ltd.,Wuhu,Anhui 241006,China)
出处
《西昌学院学报（自然科学版）》
2023年第2期40-45,共6页
Journal of Xichang University(Natural Science Edition)
基金
安徽省高校优秀青年骨干人才国内访学研修项目(gxgnfx2021176)
安徽省质量工程项目(2022cjrh029)
安徽省高校自然科学研究项目(KJ2020A1034)
安徽职业技术学院质量工程项目(2022yjgkszzhyrgg01)
安徽职业技术学院科技工程自然科学项目(2022xjzr017)。
关键词
缸内直喷
冷喷射
闪蒸条件
喷雾特性
闪蒸喷雾
direct injection
cold injection
flash evaporation
spray characteristics
flash spray
