What emission standard does IV represent?
2 Answers
IV represents China IV emission standard. Methods to distinguish China IV standard vehicles include: 1. Check the vehicle's environmental protection label; 2. Query on the website of the Motor Vehicle Exhaust Pollution Supervision and Management Center; 3. Check the vehicle's factory certificate; 4. Make a rough judgment based on the vehicle's registration year; 5. Query at the vehicle management office with the motor vehicle registration certificate. The full name of China IV is the National Phase IV Motor Vehicle Pollutant Emission Standard, which specifies the limits for harmful gases such as carbon monoxide, hydrocarbons, nitrogen oxides, particulate matter, and soot emitted from vehicle exhaust. Its purpose is to reduce and prevent environmental pollution caused by vehicle emissions, protect the ecological environment, and ensure human health.
I've always had a good understanding of automotive emission standards. IV is the Roman numeral for 4, representing China's National IV emission standard. This standard was fully implemented around 2008 in China, primarily setting strict limits on exhaust emissions for gasoline and diesel vehicles. For example, it mandates that carbon monoxide levels must not exceed certain values and has promoted the installation of more advanced exhaust treatment systems in vehicles, such as three-way catalytic converters. The introduction of the National IV standard has helped reduce air pollutants, like decreasing the frequency of urban smog incidents. Many older vehicles fail to meet this standard and may now be restricted from entering downtown areas of some major cities. From car-owner friends, I've heard that checking emission standards is essential when purchasing used cars, as it directly impacts whether the vehicle can pass annual inspections and its overall lifespan. Although the standards have now been upgraded to National VI, which is more environmentally friendly and efficient, National IV vehicles are still common in the used car market. In short, knowing that IV stands for National IV can help you make informed decisions when maintaining or purchasing a vehicle.
