标准摘要
[中文适用范围]： 本国际标准适用于重型道路车辆发动机，在认证时须遵守有关废气排放的规定。 轻便摩托车、摩托车、客车和非道路车辆不属于其范围。 本国际标准定义了一些标准，使得可以将同一制造商的那些在设计上具有相似的受管制废气排放特性（气体和颗粒污染物以及烟雾）的发动机分组到一个或多个系列中。 它定义了进行不同分组所需的参数，为制造商提供了进行较小尺寸分组的自由度。 该国际标准定义了从每个发动机系列中选择母发动机的程序，其具体特征可能会使产生低水平废气排放变得更加困难。 [外文原描述]： This International Standard is applicable to heavy-duty road vehicle engines subject to regulations as regards their exhaust emissions at the time of their certification. Mopeds, motorcycles, passenger cars and non-road vehicles are not within its scope. This International Standard defines the criteria making it possible to group those engines of the same manufacturer having, by design, similar regulated exhaust emission characteristics (gaseous and particulate pollutants, as well as smoke) within a family or families. It defines the parameters necessitating the carrying out of different groupings, leaving open to the manufacturer the latitude to carry out groupings of lower size. This International Standard defines the procedure for selecting from within each engine family the parent engine, the specific characteristics of which will probably make it more difficult to produce a low level of exhaust emissions.
英文名称Road vehicles — Engine families for certification of heavy-duty vehicles by Exhaust emission