In which year did China IV emission standards begin?

[Donovan]

China IV emission standards began in 2011 and were in effect until the implementation of China V standards in 2018. Therefore, vehicles produced between 2011 and 2017 comply with China IV standards. The China IV standards require approximately a 50% reduction in emissions of various pollutants compared to China III standards. Below is more information about the China IV emission standards: 1. The China IV emission standard is the fourth phase of national motor vehicle pollutant emission standards. 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, these standards aim to control and reduce vehicle emissions to below specified levels. 2. Compared to China III, the China IV standards require a reduction of approximately 50% in single-vehicle pollutant emissions for light-duty vehicles, about 30% for heavy-duty vehicles, and more than 80% in particulate matter emissions.