What are the new regulations for National IV diesel vehicles in 2021?
2 Answers
Through the application of technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices, the control and reduction of vehicle emission pollutants to below specified standards are achieved. Below is an introduction to National IV: 1. Concept: The National IV emission standard is the fourth stage of China's motor vehicle pollutant emission standards. 2. Issues: According to regulations, the National IV standard was to be fully implemented from October 1st, but this "standard" seems to apply only to automobile manufacturers. Regarding the promotion of National IV gasoline, the availability at gas stations remains uncertain. It was estimated to be unlikely that all fuel would be upgraded to National IV by October 1, 2012. Although the National IV standard was implemented from September 1st, locally, especially the supply of diesel that meets the "National IV" standard, was not available.
Last year when I drove a China IV diesel truck, I noticed the regulations had tightened significantly, mainly with expanded low-emission zones in cities. Places like Beijing and Shanghai restrict China IV vehicles outside the Second Ring Road, making it impossible to enter during peak hours—getting caught means fines. The environmental groups say it’s to reduce PM2.5 emissions and encourage upgrading to China VI vehicles. I think it’s reasonable—no one likes polluted air. Some smaller cities even mandate installing DPF filters to cut tailpipe pollution, but the installation isn’t cheap, often costing thousands. I’d advise long-haul drivers to plan routes in advance to avoid restricted zones. Overall, this isn’t an overnight change but a gradual shift. Preparing early to upgrade vehicles or parts can save trouble, and in the long run, it means a cleaner planet.
