What does National 5 and National 6 vehicle mean?
1 Answers
National 5 and National 6 vehicles refer to vehicles with different levels of exhaust emission environmental standards. Here are some introductions about National 5 and National 6 vehicles: 1. Meaning: National 5 and National 6 refer to the national vehicle exhaust emission standards. The larger the number, the more environmentally friendly the vehicle's exhaust emissions are. National 1 has the highest pollution level, while National 6 has the lowest. 2. Specific explanation: The National 6 emission standard is an upgraded version of the current National 5 emission standard, with additional regulations on particulate matter emissions. According to the National 6 emission standard, the emissions of carbon monoxide, hydrocarbons, non-methane total hydrocarbons, and nitrogen oxides from light-duty gasoline vehicles will be reduced by about 50% compared to the National 5 stage, and particulate matter emissions will be reduced by about 40%.