本文件规定了适用于压缩气态氢（CGH2）和氢/天然气混合车载燃料系统功能的最低安全要求，该系统拟用于ISO 3833中定义的机动车类型。 它适用于根据ISO 14687-1或ISO 14687-2使用压缩气态氢（CGH2）的车辆，以及根据ISO 15403-1和ISO/TR 15403-2使用天然气的氢/天然气混合物。它不适用于以下情况: 1） 液化氢（LH2）燃料系统部件； 2） 燃料容器； 3） 固定式燃气发动机； 4） 集装箱安装硬件； 5） 电子燃料管理； 6） 换料容器；和 7） 燃料电池汽车。 注1:应认识到，本文未具体涵盖的其他组件可进行检查，以满足本文件的标准，并根据适当的功能测试进行测试。 注2:除非另有规定，否则本文件中提及的所有压力均视为表压。 本文件不包括与安装人员和转换器技能有关的所有事项。

This document specifies the minimum safety requirements applicable for the functionality of compressed gaseous hydrogen (CGH2) and hydrogen/natural gas blends on-board fuel systems intended for use on the types of motor vehicles defined in ISO 3833. It is applicable to vehicles using compressed gaseous hydrogen (CGH2), in accordance with ISO 14687？1 or ISO 14687？2, and hydrogen/natural gas blends using natural gas, in accordance with ISO 15403？1 and ISO/TR 15403？2. It is not applicable to the following: 1) liquefied hydrogen (LH2) fuel system components; 2) fuel containers; 3) stationary gas engines; 4) container mounting hardware; 5) electronic fuel management; 6) refuelling receptacles; and 7) fuel cell vehicles. NOTE 1 It is recognized that miscellaneous components not specifically covered herein can be examined to meet the criteria of this document and tested according to the appropriate functional tests. NOTE 2 All references to pressure in this document are considered gauge pressures unless otherwise specified. All matters relating to the skills of installers and converters have been excluded from this document.