高压喷油器喷雾瞬态的喷雾角检测系统  

Detection Method of Spray Angle for Transient Fuel Sprays of GDI Fuel Injector

作　　者：吴侠 万丽[2] 朱均超[2] 李建文[1,2] 

机构地区：[1]浙江省瑞安市质量技术监督检测院,瑞安325204 [2]天津理工大学自动化学院,天津市复杂工业系统控制理论及应用重点实验室,天津300384

出　　处：《计算机系统应用》2016年第6期64-68,共5页Computer Systems & Applications

基　　金：浙江省级质监科研项目(20140251)

摘　　要：燃油喷油器是汽车发动机的关键部件,其喷雾特性是影响其工作性能的重要因素.喷油器的喷雾角是喷油器喷雾特性的重要参数之一,检测喷油器性能时需要对其进行测量.一般的测量方法是通过集油盘收集多次喷射的燃油量进行测定,效率低、准确性差.且对于喷雾时汽化损失较大的GDI(汽油缸内直喷)喷油器,液滴无法完全收集,影响测量结果.采用机器视觉技术即可检测喷油器的喷雾角,用高速相机采集喷油器的瞬态喷雾图像,微秒级的曝光时间可以有效消除高速喷雾的拖影,提高图像质量,然后进行图像预处理、图像分割、分析计算即可得出喷雾角.实验结果表明,该方法可以快速准确的检测喷油器的喷雾角,已成功应用于课题组所研制的汽车发动机喷油器计量检测综合试验台上.Fuel injector is the key part of automobile engine and its spray characteristic is an important factor influencing the performance of its work. The spray angle of fuel injectors is one of the most important parameters in the spray characteristic, and needed to measure in the detection of fuel injector performance. General method of measurement is collecting multiple injections of fuel by patternation, but it is poor accuracy and efficiency. And for gasoline-direct injection injectors, the mass lost to vapor can be very substantial, so lead to measurement errors for unable to collect fuel spray completely. Using machine vision technology can detect the spray angle, and using high-speed cameras to capture the injectors spray image, whose shadow can be eliminated by the microsecond exposures for ensuring the quality of spray image. Then the spray angle gets image preprocessing, image segmentation, and calculation. Experimental results show that this method can detect fuel injector spray angles quickly and accurately, and successfully applied to the injector measuring test-bed developed by research group.

关 键 词：GDI喷油器 燃油喷雾特性 喷雾角 边缘检测 霍夫变换 

分 类 号：U467.4[机械工程—车辆工程]