What is China IV in automotive environmental standards?
2 Answers
Automotive environmental standard China IV refers to China 4, the full name being the National Phase IV Motor Vehicle Pollutant Emission Standards. Here is an introduction to relevant knowledge about China 4: 1. Definition: The China 4 emission standard is the National Phase IV Motor Vehicle Pollutant Emission Standard. The main pollutants emitted by vehicles include HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), PM (particulate matter), etc. Through the application of technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices, the standard controls and reduces vehicle emissions to below specified limits. 2. Release date: December 30, 2005.
I remember that China IV in the automotive environmental protection standards refers to the National IV emission standard, which is the fourth phase of the national emission standards. This standard was introduced around 2007, primarily targeting the limits on exhaust pollutant emissions from light-duty vehicles, such as reducing the concentration of nitrogen oxides and particulate matter. Compared to the previous China III standard, China IV has stricter limits, helping to reduce urban air pollution. Over time, many regions now require China V or China VI standards, but you can still find China IV vehicles in the used car market or among older models. As a car user, understanding this standard can help you assess emission levels when purchasing a vehicle and avoid potential issues during annual inspections. I recommend checking the vehicle certificate for the specific emission level.
