What are the automotive exhaust emission standards?
2 Answers
Automotive exhaust emission standards are the China IV standard. The following are the harmful substances in automotive exhaust and their hazards: Harmful substances in automotive exhaust: Automotive exhaust contains hundreds of different compounds, including pollutants such as solid suspended particles, carbon monoxide, carbon dioxide, hydrocarbons, nitrogen oxides, lead, and sulfur oxides. Hazards of automotive exhaust: While directly harming human health, exhaust emissions also have profound impacts on the environment of human life. Sulfur dioxide in the exhaust has a strong irritating odor and can easily lead to "acid rain" when reaching certain concentrations, causing soil and water sources to acidify and affecting the growth of crops and forests.
As a car enthusiast, I often keep an eye on new emission regulations. Vehicle exhaust emission standards vary by region and are mainly divided into several major systems: China's National VI standard, which includes phases a and b, specifically limits the emission of harmful substances such as carbon monoxide and nitrogen oxides; Europe uses the Euro series, such as Euro 6, which also imposes strict requirements on vehicle emission reductions; the U.S. EPA standards are stringent but slightly different in approach. These different standards push automakers to optimize engine and catalytic converter technologies to reduce air pollution. Nowadays, when buying a new car, it's essential to check the emission label, otherwise, the vehicle might fail the annual inspection or face registration restrictions. These rules have been gradually upgraded from the old National I standard to improve air quality. Recently, I've been researching the impact of National VI on electric vehicles and found that hybrid vehicles also need to meet the standards, which is quite interesting.
