道路车辆.压缩天然气(CNG)燃料系统元部件.第7部分:气体喷射器

[中文适用范围]： ISO 15500 的这一部分规定了气体喷射器和/或燃油轨的测试和要求，这是一种压缩天然气燃料系统组件，旨在用于 ISO 3833 中定义的机动车辆类型。 ISO 15500 的这一部分适用于使用符合 ISO 15403-1 的天然气（单燃料、双燃料或双燃料应用）。 它不适用于用于向燃烧室进行高压喷射的喷射器，或以下部件： a) 位于汽化器上游（包括汽化器）的液化天然气（LNG）燃料系统部件； c) 固定式燃气发动机； e) 电子燃油管理； b) 燃料容器； d) 容器安装硬件； f) 加油容器。 注 1：公认的是，本文未具体涵盖的其他组件可以进行检查，以满足 ISO 15500 本部分的标准，并根据适当的功能测试进行测试。 注 2：除非另有规定，ISO 15500 本部分中所有提及的压力均应视为表压。 注 3：ISO 15500 的本部分基于天然气作为燃料的工作压力，在 15 °C 时为 20 MPa [200 bar1)]。 通过适当的系数（比率）调整压力可以适应其他工作压力。 例如，25 MPa (250 bar) 工作压力系统需要将压力乘以 1.25。 [外文原描述]： ISO 15500-7:2015 specifies tests and requirements for the gas injector and/or fuel rail, a compressed natural gas fuel system component intended for use on the types of motor vehicles defined in ISO 3833. ISO 15500-7:2015 is applicable to vehicles using natural gas in accordance with ISO 15403‑1 (mono-fuel, bi-fuel, or dual-fuel applications). It is not applicable to injectors intended for high-pressure injection to the combustion chamber, or 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