What does the National VI environmental standard mean?
2 Answers
National VI environmental standard refers to the sixth stage national motor vehicle pollutant emission standard, abbreviated as National VI standard. Automobile emission standards regulate the content of harmful gases such as carbon monoxide, hydrocarbons, nitrogen oxides, particulate matter, and soot emitted from vehicle exhaust. The National VIa standard stipulates: 1. Gasoline vehicles must not emit more than 700mg of carbon monoxide per kilometer driven; 2. Gasoline vehicles must not emit more than 68mg of non-methane hydrocarbons per kilometer driven; 3. Gasoline vehicles must not emit more than 60mg of nitrogen oxides per kilometer driven; 4. Gasoline vehicles must not emit more than 4.5mg of PM (particulate matter) per kilometer driven.
Last time I went to the DMV to handle procedures, I learned that China VI is actually the latest China 6 emission standard, specifically regulating vehicle exhaust. The national regulation requires all new vehicles to meet this standard before they can be sold, mainly to reduce pollutants emitted from exhaust pipes. It's divided into two phases: China 6a and China 6b, with China 6b being the strictest, further lowering emissions of harmful substances like carbon monoxide and particulate matter. Nowadays, all gasoline and diesel vehicles must be equipped with more advanced exhaust treatment devices, such as that thing called a particulate filter. I think this standard is quite practical, especially since environmental issues are so prominent now. Every time I drive, it feels good to know I'm emitting less pollution.
