道路车辆 压缩天然气(CNG)燃料系统部件 第1部分:一般要求和定义

[中文适用范围]： 本部分的ISO 15500标准规范了压缩天然气燃料系统组件的一般要求和定义，适用于根据ISO 3833定义的各类机动车。它还提供了通用设计原则，并对说明和标记提出要求。本部分ISO 15500适用于使用液化天然气作为燃料的车辆（单燃料、双燃料或双燃料应用），符合ISO 15403-1的规定。不适用以下情况：a) 液化天然气(LNG)燃料系统组件，位于蒸发器及其上游；b) 燃料容器；c) 固定式燃气发动机；d) 容器安装硬件；e) 电子燃油管理；f) 加油口。 注释1：公认的是，本标准未明确涵盖的各种零配件可以通过满足本部分ISO 15500的要求并根据适当的功用测试进行检查。注释2：本标准中所有关于压力的引用均指表压，除非另有说明。注3：本部分ISO 15500是基于天然气作为燃料的服务压力为20 MPa（200 bar）制定的，默认温度为15°C。其他服务压力可通过适当调整压力系数（比值）进行适应。例如，使用25 MPa（250 bar）服务压力系统的装置将需要压力乘以1.25倍。 [外文原描述]： ISO 15500-1:2015 specifies general requirements and definitions of compressed natural gas fuel system components, intended for use on the types of motor vehicles as defined in ISO 3833. It also provides general design principles, and specifies requirements for instructions and marking. This part of ISO 15500 is applicable to vehicles (mono-fuel, bi-fuel, or dual-fuel applications) using natural gas in accordance with ISO 15403‑1. It is not applicable to the following: a) liquefied natural gas (LNG) 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. NOTE 1 It is recognized that miscellaneous components not specifically covered herein can be examined to meet the criteria of this part of ISO 15500 and tested according to the appropriate functional tests. NOTE 2 All references to pressure in this part of ISO 15500 are to be considered gauge pressures unless otherwise specified. NOTE 3 This part of ISO 15500 is based upon a service pressure for natural gas as fuel of 20 MPa [200 bar[1]] settled at 15 °C. Other service pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For example, a 25 MPa (250 bar) service pressure system will require pressures to be multiplied by 1,25. [1] 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2