What are the differences between National IV and National V standards?
2 Answers
The differences between National IV and National V standards are as follows: 1. Different sulfur content limits: The sulfur content limit for National IV standard gasoline is 10mg; while for National V standard gasoline it's 50mg. 2. Different strictness levels: National V has stricter control on nitrogen oxides than National IV, with National V setting the emission limit at 25%. The National IV emission standard is China's fourth-stage motor vehicle pollutant emission standard. Main automotive emission pollutants include HC, NOx, CO, PM, etc., controlled through technologies like improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices.
As an environmentally conscious individual, I believe China 5 represents significant progress over China 4 in pollution reduction. The China 5 standard imposes stricter controls on exhaust emissions, particularly reducing harmful gases like nitrogen oxides and particulate matter. From my observations, air quality in major cities has noticeably improved, and the air feels less irritating when driving. China 5 vehicles are typically equipped with more advanced purification systems, such as urea injection technology to treat emissions from diesel vehicles. In the long run, this not only protects health but also reduces urban smog problems. I've also discussed with friends how China 5 encourages us to upgrade our vehicles, making the environment more friendly for future generations. While China 4 had more lenient emission standards, China 5 truly promotes green driving. I recommend considering this environmental aspect when choosing a car. Overall, from personal health to societal impact, China 5 outperforms China 4.
