What is the National Vehicle Emission Standard?
3 Answers
Vehicle emission standards refer to the harmful gases emitted from vehicle exhaust, such as CO (carbon monoxide), HC+NOx (hydrocarbons and nitrogen oxides), and PM (particulate matter, soot). Below is expanded information on how to check vehicle emission standards: Vehicle Conformity Certificate: When purchasing a car, it is essential to request relevant documents and certificates from the salesperson. The Vehicle Conformity Certificate clearly states the vehicle's emission standard. Although it may not explicitly label the standard as China 5 or China 6, the emission standard listed can help determine whether the vehicle meets China 5 or China 6 requirements. Environmental Information Vehicle List: The Environmental Information Vehicle List details the vehicle's environmental impact, including its tailpipe emission standard. It directly indicates the emission phase—whether it is China 5 or China 6. By reviewing this list, one can easily identify the vehicle's tailpipe emission phase. Vehicle Qualification Certificate: The vehicle's emission standard is also clearly stated on the relevant qualification certificate.
Hey, this national vehicle emission standard, I think it's like an environmental protection spell on cars, mainly divided into stages from National I to National VI. I've been driving for over ten years, watching the standards get stricter from National III to National VI. Now National VI is the strictest, aiming to reduce PM2.5, nitrogen oxides, and other stuff in exhaust gases to make the air cleaner. New cars must pass tests, like the WLTC simulated road test, and if they don't meet the standard, they can't be registered or sold. Actually, this affects us car owners quite a bit—upgrading from National V to National VI costs more, but it saves fuel and makes maintenance easier. I suggest checking for the National VI b label when buying a car—it means better emission control and long-term peace of mind.
National vehicle emission standards are mandatory regulations targeting pollutant limits for new vehicles, progressively upgraded from China I to China VI, with China VI specifically divided into 6a and 6b phases, focusing on controlling carbon monoxide, hydrocarbons, nitrogen oxides, and particulate matter. I've reviewed numerous automakers' design documents—these standards compel engine combustion optimization and the matching of after-treatment systems like three-way catalytic converters. The testing procedures are stringent, including simulated driving cycles and OBD monitoring; failure to comply results in certification denial. Benefits include reduced air pollution and extended vehicle lifespan, but challenges involve rising costs, with small-displacement vehicle prices increasing by approximately 10%.
