Difference Between China V and China IV

[DelaneyLynn]

The differences between China V and China IV: 1. Different release dates: The China IV (National Phase IV) motor vehicle pollutant emission standard was released on December 30, 2005, while the China V (National Phase V) motor vehicle pollutant emission standard was released on September 17, 2013. 2. Different content: The main pollutants emitted by China IV vehicles include HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter). These emissions are controlled and reduced to below specified limits through technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices. The China V emission control level is equivalent to the European Euro 5 emission standard. From China I to China IV, each upgrade in the standard reduces vehicle pollution by 30% to 50%. 3. Different strictness: Compared to the China IV standard, the new standard reduces nitrogen oxide (NOx) emissions by 25% for light-duty vehicles and 43% for heavy-duty vehicles. Based on Shanghai's annual vehicle registration volume of approximately 350,000 units, it is estimated that newly registered vehicles can reduce annual NOx emissions by about 1,000 tons.