Is Automotive Standard IV Equivalent to National Standard IV?
2 Answers
Automotive environmental National IV is equivalent to National Standard IV. The full name of 'National Standard IV' is: China's Phase IV Motor Vehicle Emission Standards, which is equivalent to Europe's 'Euro IV Standard'. Compared to 'National Standard III', 'National Standard IV' imposes stricter controls on motor vehicle emissions, requiring a further reduction of 30% to 50% in pollutants on top of meeting 'National Standard III' to achieve compliance. Below is relevant information: The National IV Emission Standard is China's Phase IV Motor Vehicle Pollutant Emission Standard. The main pollutants emitted by vehicles include HC (Hydrocarbons), NOx (Nitrogen Oxides), CO (Carbon Monoxide), PM (Particulate Matter), etc. By employing technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices, the standard aims to control and reduce vehicle emissions to below specified levels.
I'm quite familiar with automotive emission standards. The China IV standard, also known as National IV or Guo IV, represents China's fourth-stage emission standard. It was implemented around 2008, requiring new vehicles to control pollutant emissions, such as reducing carbon monoxide and nitrogen oxide emissions. It's much stricter than China III, demanding more efficient catalytic converters. Currently, most vehicles on the market comply with China V or China VI standards, while China IV vehicles are starting to depreciate in the used car market due to potential driving restrictions in major cities, such as limited access to urban core areas. Understanding these standards can help you avoid pitfalls when choosing a car and make it easier to pass emission tests during used car inspections. After all, emission upgrades aim to reduce smog and improve urban air quality, though China IV vehicles are less fuel-efficient compared to newer standards.
