How to distinguish between National 5 and National 6 vehicles?
1 Answers
Methods to distinguish between National 5 and National 6 vehicles: 1. Different control levels: The emission control level of National 5 standard is equivalent to the 5th stage emission standard currently implemented in Europe; National 6 emission standard aims to prevent environmental pollution caused by exhaust emissions from compression-ignition and gas-fueled spark-ignition engine vehicles. 2. Different issuing departments: National 5 standard was issued by the Ministry of Environmental Protection; National 6 emission standard was jointly issued by the Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection and Quarantine. 3. Different requirements: National 5 has different emission standards for diesel and gasoline vehicles; National 6 adopts a fuel-neutral principle, meaning the emission limits are the same regardless of the fuel type. 4. Different strictness: National 5 requires that carbon monoxide emissions from gasoline vehicles must not exceed 1g per kilometer, and diesel vehicles must not exceed 0.5g per kilometer; National 6's emission standards are basically the same as National 5, but it adopts the strictest values from National 5, such as carbon monoxide emissions from both gasoline and diesel vehicles not exceeding 0.5g per kilometer.
