| This standard was formulated for the purpose of implementing Environmental Protection Law of the People¡¯s Republic of China and Air Pollution Prevention and Control Law, guaranteeing the quality of emission testing and controlling smoke emission from vehicles with compression ignition and gas fuelled positive ignition engines and improving air quality. This standard stipulates the technical requirements and examination methods for on-board diagnostic (OBD) system of vehicle equipped with compression engine and the compression engine as well as vehicle equipped with ignition engine and the ignition engine fuelled by natural gas (NG) or liquefied petroleum gas (LPG).
This standard is applicable to the type verification and production conformity checkup of compression (including gas fuelled ignition compression) engine and the OBD system equipped in M2, M3, N1, N2 and N3 type of vehicle with the designed speed over 25km/h as well as M1 type of vehicle with the total mass over 3500kg. The compression (including gas fuelled ignition compression) engine equipped in N1 and M2 type of vehicle can be exempted from the type verification stipulated in this standard should such vehicles have already undergone the OBD system type verification as per the stipulation of Limits and Measurement Methods for Emissions from Light-Duty Vehicles (GB18352.3-2005).
This standard is released for the first time. |
