What is China National Standard IV for Vehicles?
2 Answers
China National Standard IV for vehicles refers to the National IV emission standard. Additional information: 1. The full name of National Standard IV is the National Fourth Stage Motor Vehicle Pollutant Emission Standard; 2. The main pollutants emitted by vehicles include hydrocarbons, nitrogen oxides, carbon monoxide, and particulate matter; 3. Through technologies such as the active layer of catalytic converters, secondary air injection, and exhaust gas recirculation systems with cooling devices, vehicle emissions are controlled and reduced to meet the specified standards; 4. Implementing vehicle emission standards can effectively control the emission of vehicle pollutants, reduce air pollution, protect the natural environment, and minimize harm to human health.
As an ordinary car owner, I deeply understand this when buying a car. China National Standard IV is the fourth-stage emission standard set by the country to regulate vehicle exhaust pollution. I remember a few years ago when choosing a car, the salesperson specifically emphasized this point because it was the transition period from National III to National IV, and many cities like Beijing and Shanghai had started implementing it. National IV vehicles have stricter controls on pollutant emissions, with lower limits for carbon monoxide and nitrogen oxides, allowing them to drive into urban areas without restrictions. But now the standard has been upgraded to National VI, so you need to be careful when choosing a used car: although National IV cars can still be driven, their resale value may drop if policies tighten. Regular maintenance of the emission system is crucial, such as cleaning the catalytic converter, which can reduce black smoke emissions. Overall, understanding what National IV represents can help you avoid pitfalls when purchasing a car, saving money while being environmentally friendly.
