This Standard is formulated for the purpose of implementing the Environmental Protection Law of the People's Republic of China and the Law of the People's Republic of China and Law of the People's Republic of China on the Prevention and Control of Atmospheric Pollution, controlling the exhaust pollutants from vehicles, improving ambient air quality. The current Standard identifies the limits and measurement methods for exhaust smoke from C.I.E.(Compression Ignition Engine) and vehicle equipped with C.I.E. The current standards is applicable to the emission of exhaust smoke from compression ignition engine including the approval of and production consistency check on engine types; emission of exhaust smoke from the vehicle equipped with C.I.E. including the type approval, production consistency check and test of new & in-service vehicles. It is applicable to the in-service vehicles manufactured in accordance with Emission Standard for Smoke at Free Acceleration from Vehicle with Diesel Engine (GB14761.6-93). The measurement methods is the same as the method specified in the Measurement Methods for Smoke Exhaust from Vehicle with Diesel Engine at Free Acceleration--Filtermeter (GB/T3846-93) with corresponding limits and measurement methods included in the current Standard. The current Standard is also applicable to the light-duty vehicles equipped with C.I.E whose emissions meeting GB18352. But it is not applicable to low-speed goods vehicles and tri-wheel vehicles.
(This English version is for your reference only.In case any discrepancy exists between the Chinese and English context, the Chinese version shall prevail.)