What are the differences between National 5 and National 6 emission standards for passenger cars?
1 Answers
The differences between National 5 and National 6 emission standards for passenger cars lie in their control levels, release dates, and issuing authorities. Here are the specific differences between National 5 and National 6 emission standards for passenger cars: Different control levels: The emission control level of National 5 standard is equivalent to the European Phase 5 emission standard currently in implementation. The National 6 standard for motor vehicle pollutant emissions is formulated to prevent environmental pollution caused by exhaust emissions from compression-ignition and gas-fueled spark-ignition engine vehicles, protect the ecological environment, and safeguard human health. Different release dates: The National 5 standard was released on September 17, 2013. The National 6 standard for motor vehicle pollutant emissions was released on June 22, 2018 (for heavy-duty diesel vehicles). Different issuing authorities: The National 5 standard was issued by the Ministry of Environmental Protection. The National 6 standard for motor vehicle pollutant emissions was jointly issued by the Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection and Quarantine.
