一、前言在国际标准化组织(ISO)内有三个技术委员会(TC)从事内燃机国际标准工作。TC2是内燃机技术委员会。它的工作范围包括农村设施、机车及船用发动机的国际标准,但不是全部的内燃机国际标准。汽车用内燃机国际标准归道路车辆技术委员会(或简称TC22)管辖;农机、拖拉机用内燃机属拖拉机、农业机械技术委员即TC23的工作范围。 I. INTRODUCTION There are three technical committees (TCs) within the International Organization for Standardization (ISO) for international standards of internal combustion engines. TC2 is an internal combustion engine technical committee. Its scope of work includes international standards for rural facilities, locomotives and marine engines, but not all international standards for internal combustion engines. International standards for automotive internal combustion engines shall be governed by the Technical Committee of Road Vehicles (or referred to as TC22 for short); the internal combustion engine for tractors and tractors is a work area for the TC23, a tractor and agricultural machinery technical committee.