What are the standards for motor vehicle exhaust emissions testing?

[OMiguel]

Automobile exhaust emission standards are divided into gasoline vehicle testing standards and diesel vehicle testing standards. The following is a detailed introduction to automobile exhaust emissions: 1. The Euro I, Euro II, Euro III, and Euro IV standard values for gasoline vehicle HC emissions testing are 1.1%, 1.1%, 0.66%, and 0.46%, respectively; the Euro I, Euro II, Euro III, and Euro IV standard values for gasoline vehicle CO emissions testing are 4.5%, 4%, 2.1%, and 1.5%, respectively; 2. The Euro I, Euro II, Euro III, and Euro IV standard values for gasoline vehicle NOx emissions testing are 8%, 7%, 5%, and 3.5%, respectively; the Euro I, Euro II, Euro III, and Euro IV standard values for gasoline vehicle PM emissions testing are 0.36%, 0.15%, 0.1%, and 0.02%, respectively; 3. The Euro I, Euro II, Euro III, and Euro IV standard values for diesel vehicle HC+Nox emissions testing are 1.36%, 0.9%, 0.56%, and 0.3%, respectively; the Euro I, Euro II, Euro III, and Euro IV standard values for diesel vehicle CO emissions testing are 2.72%, 1.0%, 0.64%, and 0.5%, respectively; 4. The Euro I, Euro II, Euro III, and Euro IV standard values for diesel vehicle PM emissions testing are 0.196%, 0.1%, 0.05%, and 0.025%, respectively.