What is the equivalent of China's National IV emission standard?
3 Answers
China's National IV emission standard corresponds to the fourth stage of national vehicle pollutant emission standards. The primary pollutants from vehicle emissions include hydrocarbons, nitrogen oxides, carbon monoxide, and particulate matter. This standard requires controlling and reducing these pollutants below specified limits through technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices. The National IV standard is equivalent to Europe's Euro IV standard. Compared to the National III standard, it imposes stricter controls on vehicle emissions, requiring a further 30% to 50% reduction in pollutants beyond the National III requirements to achieve compliance.
National IV is actually the China IV emission standard, which I researched when buying a car a few years ago. It represents China's fourth-phase vehicle environmental requirements, officially implemented around 2010. Compared to the previous China III standard, China IV imposes stricter controls on carbon dioxide and carbon monoxide emissions, helping to reduce air pollution. Many new car models have now upgraded to China VI or even higher standards, so China IV vehicles can no longer be registered for new license plates in some major cities. If you're browsing the used car market, be sure to pay attention to this to avoid purchasing a car that can't be driven legally. In short, understanding vehicle standards thoroughly can save you a lot of trouble—I personally encountered a similar issue when buying an older car last time and even had to check policies at the local DMV.
When it comes to China IV, I believe it refers to what we commonly call the fourth-stage emission standard. I recall that the country gradually promoted and implemented it after 2010, requiring lower nitrogen oxide emissions from new vehicles. This not only improved vehicle efficiency but also enhanced environmental awareness. For example, a friend of mine who drives a China IV-compliant car has experienced better fuel economy and improved exhaust purification. However, with the rise of China V and China VI standards, some cities have imposed license plate restrictions on China IV vehicles. The focus also includes its impact on phasing out older vehicles—back in the day, I saw too many smoky cars on the highways, so this standard marked significant progress. Every time this topic comes up, I feel that policy changes are too rapid, and car owners need to stay updated constantly.
