GB 17691-2018 English Translation of Chinese Standard

Book excerpt: 1 Application scope This standard specifies the emission limits and measurement methods for gaseous and particulate pollutants from vehicles equipped with compression-ignition engines and their engines as well as those for gaseous pollutants from vehicles equipped with natural gas (NG) or liquefied petroleum gas (LPG) fuelled positive ignition engines and their engines. This standard is applicable to the type test, checking of conformity of production, newly produced vehicle emission supervision inspection and in-service conformity inspection of vehicles of categories M2, M3, N1, N2 and N3 equipped with compression-ignition engines and gas fuelled positive ignition engines and vehicles of category M1 with a total mass exceeding 3,500kg as well as their engines. The type test of a complete vehicle given under this standard may be extended to its variants and versions with a reference mass above 2,380kg. The vehicles of categories M1, M2, N1 and N2 equipped with compression-ignition engines and gas fuelled positive ignition engines which have been subjected to type test in accordance with GB 18352.6-2016 may not be subjected to type test in accordance with this standard.