道路车辆. 压缩气态氢(CGH2)和氢/天然气混合燃料系统部件. 第4部分: 止回阀

[中文适用范围]： 本部分 specifies general 要求 and 定义 of compressed gaseous hydrogen (CGH2) 和 hydrogen/natural gas blend 燃料系统 components，intended for use on the types of motor vehicles defined in ISO 3833. It also provides general 设计 principles and specific 要求 regarding instructions and markings. It applies to vehicles using compressed gaseous hydrogen (CGH2) in accordance with ISO 14687-1 或 ISO 14687-2 和使用 natural gas 在 accordance with ISO 15403-1 和 ISO/TR 15403-2. 它不适用于以下情况：a) 液化氢 b) stationary gas engines; vaporizers; b) 燃料容器；(LH2) 燃料系统 components located upstream of，and including，the d) container mounting hardware; e) 电子燃料管理；f) 加气 receptacles. [外文原描述]： ISO 12619-4:2016 specifies general requirements and definitions of compressed gaseous hydrogen (CGH2) and hydrogen/natural gas blends fuel system components, intended for use on the types of motor vehicles defined in ISO 3833. It also provides general design principles and specifies requirements for instructions and markings. 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: a) liquefied hydrogen (LH2) fuel system components located upstream of, and including, the vaporizer; b) fuel containers; c) stationary gas engines; d) container mounting hardware; e) electronic fuel management; f) refuelling receptacles.