What National Emission Standards Do IV and V Represent?
2 Answers
The environmental protection standards labeled as National IV (National V) in vehicle parameters indicate that the vehicle complies with two emission standards. Manufacturers produce specific models tailored to different regional requirements. Cities mandating National V standards receive National V compliant models, while those requiring National IV standards are supplied with National IV compliant vehicles. Here is information about the National IV emission standard: 1. The National IV emission standard represents China's fourth-phase motor vehicle pollutant emission regulations. Primary automotive pollutants include HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter). This standard controls and reduces vehicle emissions below specified thresholds through technologies such as advanced catalytic converter active layers, secondary air injection, and cooled exhaust gas recirculation systems. 2. The "National V" emission standard is equivalent to the Euro V standard, which Europe formally implemented on September 1, 2009.
Beginners often confuse these Roman numerals - IV stands for China 4 emission standard, while V represents China 5. The China 4 standard was implemented around 2010, mainly controlling carbon monoxide and hydrocarbon emissions. It's more advanced than China 3 but inferior to the current China 6. I've seen many older cars with IV badges on their taillights, indicating China 4 compliance. After driving for over a decade, I've noticed China 4 vehicles often face penalties in cities with traffic restrictions, like Beijing and Shanghai where older standard vehicles are banned downtown. Lower emission standard vehicles contribute more to air pollution, so governments are phasing them out gradually. To check your vehicle's standard, consult the environmental manual or look for the door frame plate - don't rely on verbal descriptions. China 5 vehicles became common after 2017 with cleaner emissions. When buying used cars, pay attention to the registration year - China 5 or above models are more worry-free. While emission upgrades are positive, owners of older vehicles must stay informed about policy changes. In short, knowing IV means China 4 and V means China 5 can help avoid pitfalls in car purchasing and maintenance.
