What does China III and China IV vehicles mean?
1 Answers
China III and China IV vehicles refer to the vehicle exhaust emission standards. China's emission standards are primarily based on the European Union emission standards, with modifications to adapt to national conditions and practical realities. However, overall, China's emission standards are not as stringent as those of the European Union. Relevant information is as follows: 1. The characteristics of the On-Board Diagnostics (OBD) system include an increase in detection points and detection systems, with oxygen sensors installed at both the inlet and outlet of the three-way catalytic converter. Compliance is entirely controlled through real-time monitoring of vehicle emissions, which better ensures the implementation of the Euro I emission standards. 2. The China IV emission standard is the fourth stage national standard for motor vehicle pollutant emissions. The main pollutants emitted by vehicles include HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter). Through the application of technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices, the standard aims to control and reduce vehicle emissions to below specified levels.