What National Emission Standard Does VI Refer To?
2 Answers
VI refers to the China VI emission standard, which is established to prevent environmental pollution caused by exhaust emissions from compression-ignition and gas-fueled spark-ignition engine vehicles, protect the ecological environment, and safeguard human health. The emission limits for China VI standard are: 1. Carbon monoxide (CO) emission limit of 700 milligrams; 2. Non-methane hydrocarbon (NMHC) emission limit of 68 milligrams; 3. Nitrogen oxides (NOx) emission limit of 60 milligrams; 4. Particulate matter (PM) emission limit of 4.5 milligrams. Methods to check the China VI standard include: 1. Inspecting the vehicle's environmental protection compliance label; 2. Checking the page where the vehicle certification number begins; 3. Estimating the emission standard based on the vehicle's manufacturing year; 4. Using the original or a copy of the motor vehicle registration certificate to inquire at the local vehicle management office.
As an automotive technician, I frequently deal with emission issues. VI refers to the China 6 emission standard, which is currently the highest emission stage in China. The China 6 standard has been implemented nationwide since 2019 and is significantly stricter than China 5, imposing lower limits on hydrocarbon and nitrogen oxide emissions. Therefore, new vehicles must be equipped with better technologies, such as particulate filters and catalytic converters. China 6 is further divided into two phases: 6a and 6b, with 6b having higher requirements and being fully implemented in 2023. This has a significant impact on owners of older vehicles because China 5 vehicles can no longer be newly registered. During maintenance, it's important not to randomly replace parts, as this can easily lead to exceeding emission limits. When buying a used car, always check the emission standard to avoid fines or driving restrictions later. I recommend choosing a China 6 vehicle to save money and hassle.
