In which year did China IV emission standards begin?

[CorbinFitz]

China IV emission standards began in 2011. Below is relevant information about the China IV standards: 1. Vehicles produced between 2011 and 2017 comply with China IV standards, which require approximately 50% lower emissions of various pollutants compared to China III standards. 2. The main pollutants regulated by China IV standards include HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter). These standards are achieved through technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices, ensuring that vehicle emissions are controlled and reduced below specified limits. 3. The pollutant emission limits under China IV standards will be further reduced by 60%. To ensure vehicles maintain stable compliance with emission limits during use and guarantee the durability of emission control performance, additional requirements are imposed for On-Board Diagnostics (OBD) systems and in-use vehicle compliance.