Is the national four automobile emission standard a domestic car? Is Euro IV an imported car? Please be professional.

It is just an emission standard. If it is in Europe, it is four euros. If it's in China, it's four countries. For example, it is 4 euros in Russian and 4 countries in China.

1. National III emission standard mainly refers to: HC emission is less than 0.2g/km, CO emission is less than 2.3g/km, and NOx emission is less than 0. 15g/km, and there is no PM requirement.

2. The national four emission standards are mainly that the HC emission value is lower than 0. 1g/km, the CO emission value is lower than 1g/km, and the NOx emission value is lower than 0.08g/km, so PM is not required.

Extended data:

Precautions:

China and European emission standardsNo. 1 and 2.

The emission standard limits of China and Europe 1 are: carbon monoxide shall not exceed 3.16g/km; Hydrocarbons shall not exceed1.13g/km; Diesel particulate matter standard shall not exceed 0.18g/km; The durability requirement is 50,000 kilometers. Emission standards that China must meet from 1999 1 to 2003 12 3 1.

The emission standard limits of China and European emission standard 2 are: carbon monoxide in gasoline vehicles shall not exceed 2.2g/km, and hydrocarbons shall not exceed 0.5g/km；; Carbon monoxide in diesel vehicles shall not exceed 1.0g/km.

Hydrocarbons shall not exceed 0.7g/km, and particulate matter shall not exceed 0.08g/km. This is the European No.2 emission standard adopted by China in 2004.