本文件规定了用于交流发电机组应用的往复式内燃机（RIC）的主要特性。 它适用于陆上和海上交流发电机组的RIC发动机，不包括用于飞机或驱动陆上车辆和机车的发电机组。 对于某些特定应用（如基本医院用品、高层建筑），可能需要补充要求。本文件的规定可被视为制定任何补充要求的依据。 列出并解释了定义RIC发动机调速和速度特性的术语，这些术语特别适用于使用发动机驱动车辆。 c、 发电机。 对于其他往复式原动机（如蒸汽机），本文件的规定可作为确定这些要求的基础。

This document specifies the principal characteristics of Reciprocating Internal Combustion (RIC) engines when used for alternating current (a.c.) generating set applications. It applies to RIC engines for a.c. generating sets for land and marine use, excluding generating sets used on aircraft or to propel land vehicles and locomotives. For some specific applications (e.g. essential hospital supplies, high rise buildings), supplementary requirements can be necessary. The provisions of this document can be regarded as the basis for establishing any supplementary requirements. The terms which define the speed governing and speed characteristics of RIC engines are listed and explained where they apply specifically to the use of the engine for driving a.c. generators. For other reciprocating-type prime movers (e.g. steam engines), the provisions of this document can be used as a basis for establishing these requirements.