In which years were China IV vehicles produced?

[LeMadelyn]

China IV emission standard vehicles were generally produced after 2009. The China IV emission standard is introduced as follows: Content of China IV emission standard: The China IV emission standard is the national fourth-stage motor vehicle pollutant emission standard. Main automotive emissions 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, it controls and reduces vehicle emissions to below specified limits. Goals of China IV emission standard: Reduce inhalable particulate matter concentration (PM10) in all prefecture-level and above cities by more than 10% compared to 2012, with good air quality days increasing year by year; decrease fine particulate matter concentration (PM2.5) in Beijing-Tianjin-Hebei region, Yangtze River Delta, and Pearl River Delta by approximately 25%, 20%, and 15% respectively.