How to identify the three countries and four countries of the automobile country?

It can be identified by vehicle identification code (VIN) information.

The fourth stage of the national motor vehicle pollutant emission standards.

Introduction:

The fourth stage of the national motor vehicle pollutant emission standards, referred to as "national IV emission standards" and national IV standards, mainly includes HC (hydrocarbons), nitrogen oxides (nitrogen oxides), CO (carbon monoxide), PM (particulate matter) and so on. By using better active layer of catalytic converter, secondary air injection, exhaust gas recirculation system with cooling device and other technologies, the automobile emission pollutants can be controlled and reduced to below the specified value. Beijing, Shanghai and the Pearl River Delta have taken the lead in implementing this standard. 2065 438+07 03 19 Only Beijing, Shanghai, Guangzhou, Shenzhen, Nanjing, Urumqi, Lanzhou and other regions have strictly implemented the national four standards.

Difference:

1, 3,4 refers to Euro3,Euro4? Compared with the second country, the third country has further reduced the emission limit of pollutants. The emission limit of exhaust pollutants in the third national standard is 30% lower than that in the second national standard, while the fourth national standard will be further reduced by 60%. In order to ensure that the vehicle meets the emission limit requirements stably in use and ensure the durability of vehicle emission control performance, the requirements for on-board diagnostic system (OBD) and in-use vehicle compliance are increased.

2. China's national III and IV emission standards for light vehicles are completely the same as Euro III and Euro IV in pollutant emission limits, but there are some improvements in experimental methods and great differences between them in regulatory format.

3. The fourth national standard requires that on the basis of the third national standard, the pollutant emissions of light vehicles and bicycles should be reduced by about 50%, the pollutant emissions of heavy vehicles and bicycles should be reduced by about 30%, and the particulate emissions should be reduced by more than 80%.