GB/T 8190.3-2003 in English

《GB/T 8190.3-2003往复式内燃机 排放测量 第3部分: 稳态工况排气烟度的定义和测量方法》由TC177（全国内燃机标准化技术委员会）归口，主管部门为中国机械工业联合会。
本部分规定了往复式内燃机稳态工况下两种排烟特性的测量方法。一种方法是用测量光束的明暗度来评定排烟的消光度；另一种方法是用测量滤纸的黑度来评定碳烟含量。本部分适用于陆用、铁路牵引和船用往复式内燃机，其中包括用于驱动农用拖拉机和道路车辆的发动机。本部分也适用于驱动筑路和土方机械、工业卡车以及其他尚无合适国家标准用以测量排气烟度的发动机。

Scope

This part of GB/T 8190 specifies the measurement methods for two kinds of smoke exhaust characteristics of reciprocating internal combustion engines (RIC) under steady-state conditions. One method is to evaluate the extinction degree of exhaust smoke by measuring the brightness of the light beam, and the other method is to evaluate the soot content by measuring the blackness of filter paper. Separate requirements may also be specified for specific purpose engines, if necessary. This part of GB/T 8190 does not involve the measurement of transient conditions. 'Using a smoke meter under transient conditions, due to the different types of instruments, the results obtained cannot be compared unless the sampling conditions are the same and the characteristics of the instruments are similar. This part of GB/T 8190 applies to land, railway traction and marine reciprocating internal combustion engines, including engines used to drive agricultural tractors and road vehicles. This section also applies to driving road construction and earth moving machinery, industrial trucks and other engines that do not yet have a suitable national standard for measuring exhaust smoke. NOTE: If water is sprayed into the exhaust system, measurements or samples should only be taken upstream of the water spray.