轻便摩托车 - 检查或维护期间气体废气排放的测量方法

[中文适用范围]： 本国际标准规定了在检查或维护期间直接测量 ISO 3833 中定义的轻便摩托车废气排放浓度的方法。 本国际标准测量的结果显示了发动机空载工况下废气排放的浓度。 本标准适用于装有火花点火式发动机（四冲程发动机或二冲程发动机）的轻便摩托车。 这些方法可全部或部分用于： - 官方车库的定期检查； - 官方路边检查；以及 - 维护和诊断操作。 [外文原描述]： ISO 19449:2015 specifies methods for the direct measurement of the concentration of gaseous exhaust emissions from mopeds as defined in ISO 3833 during inspection or maintenance. The results measured by this International Standard show the concentration of gaseous exhaust emissions in the no-load engine operating condition. It is applicable to mopeds having spark ignition engines (four-stroke engines or two-stroke engines). These methods can be used, either totally or partially, for - periodic inspections in official garages, - official roadside checks, and - maintenance and diagnostic operations.