What are the differences between National VI and National V?
1 Answers
National VI is more environmentally friendly than National V, with higher requirements for vehicle exhaust emissions. Both National VI and National V refer to the national automobile emission standards, officially known as "Limits and Measurement Methods for Emissions from Light-Duty Vehicles." The difference lies in the stages at which these standards were formulated. The purpose of these standards is to control and reduce vehicle emissions and improve ambient air quality. The differences between National VI and National V include: 1. Different implementation times: The National VI standard was implemented in December 2014, while the National V standard was implemented in December 2017. 2. Different sulfur content limits: The National VI standard specifies a sulfur content of no more than 50mg/kg, whereas the National V standard specifies a sulfur content of no more than 10mg/kg. 3. Different particle number limits: Taking passenger cars as an example, nitrogen oxide emissions from gasoline vehicles are 25% stricter, and diesel vehicles are 28% stricter. The National V standard introduced a new particle number limit, reducing particulate emissions by 82% compared to previous standards. 4. Different durability mileage: The durability mileage of pollution control devices under National V has doubled, increasing from the original 80,000 kilometers to 160,000 kilometers. This means that within 160,000 kilometers, vehicle emissions must meet the standard's limit requirements. 5. Different environmental protection levels: Compared to National IV, National V has higher emission standards and a higher environmental protection level.
