What is the Chinese equivalent of Euro IV emission standards?
1 Answers
Euro IV corresponds to China's National IV emission standard. China's National III and National IV emission standards for light-duty vehicles have identical pollutant emission limits to Euro III and Euro IV standards, but with some improvements in testing methods and significant differences in regulatory formats. Major automotive pollutants include HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter). The National IV emission standard achieves control and reduction of vehicle emissions below specified limits through technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices.