燃料喷嘴口的微孔在汽车发动机的燃料效率和尾气排放中起关键作用 .微孔的几何与表面质量的表征对理解其制造过程及其对喷嘴功能的影响十分重要 ,然而由于其尺寸小 ,对这类微孔质量的表征一直是一个难题 .本文介绍作者最近进行的用扫描电子显微镜、扫描隧道显微镜、原子力显微镜来表征微孔质量研究的一个实例 .虽然大多数计量系统并不是为测量像喷嘴口的微孔这类非平面特征设计的 ,只要合理选择装置和测头 ,微孔的高精度多尺度表征是可以实现的 Micropores in fuel nozzle openings play a key role in the fuel efficiency and exhaust emissions of automotive engines.The characterization of the micropore geometry and surface quality is important to understand its manufacturing process and its effect on nozzle function, Characterization of micropore quality has always been a challenge.In this paper, we introduce an example of recent studies by authors to characterize microwells using scanning electron microscopy, scanning tunneling microscopy, and atomic force microscopy, although most metrology systems are not designed to measure images Non-planar features such as micropores in the nozzle orifice are designed so that as long as the device and probe are properly selected, high-precision multiscale characterization of micropores is achievable