What emission standard does IV correspond to?
1 Answers
IV corresponds to the China IV emission standard, which is the national fourth-stage motor vehicle pollutant emission standard. Vehicles meeting the China IV standard must reduce pollutants by an additional 30% to 50% compared to China III standards to comply. Automotive emissions refer to harmful gases such as CO, HCNOx, and PM discharged from exhaust. Technologies like improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices are applied to control and reduce vehicle emissions below specified limits. Any new compression-ignition vehicles failing to meet China IV standards cannot be registered.