直喷汽油机喷油器喷雾可视化测试系统开发及试验  

Development and Experiment of Spray Visualization Testing System for GDI Injector

作　　者：石玲[1] 吴国兴[1] 张振东[2] 尹从勃 

机构地区：[1]上海师范大学,上海201815 [2]上海理工大学,上海200093

出　　处：《汽车技术》2017年第1期26-32,共7页Automobile Technology

基　　金：国家自然科学基金项目(51275309)

摘　　要：为了有效观测直喷汽油机喷油器工作过程中喷雾形态的变化历程,开发了一套由定容装置、供油系统、环境背压调节系统、环境温度调节系统、喷油控制系统以及高速摄像机等组成的喷雾形态可视化测试平台,并利用该平台测试了不同喷油压力、环境压力和环境温度下GDI喷油器的喷雾形态变化过程。试验结果表明,喷油压力、环境压力及环境温度是影响喷雾形态发展过程的关键因素,所开发的喷雾形态测试平台能够模拟缸内的不同压力和温度条件,并对不同喷油压力下喷雾形态的变化历程进行有效测试。In order to effectively observe the change process of spray pattern of GDI engine injector, a visualization test platform was developed which consisted of a constant volume, fuel system, a back pressure regulator system, ambient temperature control system, fuel injection control system and high-speed cameras and other components. The spray pattern of a GDI injector was tested at different fuel injection pressure, different ambient pressure and different ambient temperature by the platform. The test results showed that injection pressure, ambient pressure and ambient temperature are the key factors to affect the development process of the spray pattern, besides with the spray pattern test platform different in-cylinder pressures and temperature conditions can be simulatecl and the spray pattern changes at different injection pressures can be tested.

关 键 词：直喷汽油机喷油器 喷雾形态 可视化系统 

分 类 号：U464.171[机械工程—车辆工程] TK6[交通运输工程—载运工具运用工程]