本文件规定了当不与气体喷射装置（液化石油气燃料组件）结合使用时，用于ISO它还提供了一般设计原则，并规定了说明和标记的要求。 本文件适用于根据ISO？使用气体燃料的车辆（单燃料、双燃料或双燃料应用）9162.不适用于以下情况: a） 燃料容器； b） 固定式燃气发动机； c） 集装箱安装硬件； d） 电子燃油管理； e） 加油容器。 人们认识到，本文中未特别说明的其他组件可以检查是否符合ISO任何适用部分的标准20766系列，包括对适当功能测试的测试。 除非另有规定，本文件中的所有压力参考均视为表压。 本文件适用于工作压力在110？范围内的装置kPa（20°C下富含丁烷）和840°CkPa（20°C下富含丙烷），以下在本文件中提及。 通过适当的系数（比率）调整压力，可以适应其他工作压力。

This document specifies general requirements and definitions for the gas dosage unit when not combined with the gas injection device (a liquefied petroleum gas fuel component), 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 marking. This document is applicable to vehicles (mono-fuel, bi-fuel or dual-fuel applications) using gaseous fuels in accordance with ISO？9162. It is not applicable to the following: a) fuel containers; b) stationary gas engines; c) container mounting hardware; d) electronic fuel management; e) refuelling receptacles. It is recognized that miscellaneous components not specifically addressed herein can be examined for compliance with the criteria of any applicable part of the ISO？20766 series, including testing to the appropriate functional tests. All references to pressure in this document are considered gauge pressures unless otherwise specified. This document applies to device which have a service pressure in the range of 110？kPa (butane rich at 20？°C) and 840？kPa (propane rich at 20？°C), hereafter referred to in this document. Other service pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio).