本SAE推荐实施规程提供了液体燃料分配器喷嘴的标准尺寸，并提供了一个系统，用于区分将液体燃料分配到配备火花点火（SI）发动机和陆上车辆压燃（CI）发动机的车辆中的喷嘴。目前的法律定义仅区分“无铅燃料”和“所有其他类型的燃料”这些定义不再有效。本文件建立了一套新的定义，对当前的汽车液体燃料入口和液体燃料分配器喷嘴有实际应用。

This SAE Recommended Practice provides standard dimensions for liquid fuel dispenser nozzle spouts and a system for differentiating between nozzles that dispense liquid fuel into vehicles with spark ignition (SI) engines and compression ignition (CI) engines for land vehicles. Current legal definitions only distinguish between "Unleaded Fuel" and "All Other Types of Fuel." These definitions are no longer valid. This document establishes a new set of definitions that have practical application to current automobile liquid fuel inlets and liquid fuel dispenser nozzle spouts.