What are the differences between China IV and China V standards?

[ChaseMarie]

The differences between China IV and China V standards lie in their sulfur content limits: China IV standard gasoline has a sulfur content limit of 10mg, while China V standard gasoline has a sulfur content limit of 50mg. The details are as follows: 1. China V: It imposes stricter controls on nitrogen oxides compared to China IV, with China V setting the emission limit at 25%. 2. China IV: The China IV emission standard is the fourth stage of China's motor vehicle pollutant emission standards. The main pollutants emitted by vehicles include HC, NOx, CO, PM, etc. Technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices are applied to reduce these emissions.