What are the exhaust emission standards for automotive environmental protection testing?

[LaAlan]

Automotive environmental protection exhaust emission testing standards set the limit for carbon monoxide at 6.3g/km, and the combined limit for hydrocarbons and nitrogen oxides at 2.0g/km. Below are the specific details of the automotive environmental protection exhaust emission testing standards: 1. Smoke opacity value as the compliance basis: Automotive exhaust emission testing is based on whether the smoke opacity value meets the standards, and compliance is primarily determined by vehicle testing data, confirming whether the vehicle meets standards based on the smoke opacity value. 2. Annual inspection checks exhaust emission compliance: The annual inspection of passenger vehicles includes testing for exhaust emissions. During the annual vehicle inspection, the external inspection includes checking whether the exhaust emissions meet environmental protection standards. 3. Exhaust emission standards vary by vehicle: The standard values differ depending on the vehicle model, total vehicle weight, year of manufacture, and type of fuel used.