What is the National IV Standard?
2 Answers
National IV Standard is the fourth stage national standard for motor vehicle pollutant emissions. Here is a partial introduction to the National IV emission standard: 1. Introduction: The National IV emission standard is the fourth stage national standard for motor vehicle pollutant emissions. 2. Vehicle emission pollutants: Mainly include HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), PM (particulate matter), etc. 3. Purpose: Through the application of technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices, it aims to control and reduce vehicle emission pollutants below specified limits.
I remember when buying a car around 2010, the salesperson mentioned the China IV emission standards. Essentially, it's a new set of national regulations for vehicle exhaust emissions, requiring cars to emit fewer pollutants like carbon monoxide and hydrocarbons, keeping them within specified limits. Simply put, it's about making our air cleaner and reducing smog. If the used car you buy doesn't meet China IV standards, you might face driving restrictions in big cities like Beijing, Shanghai, or Guangzhou, which can be quite a hassle. During annual inspections, this is a key check item—failing means you'll need to get your car fixed. I recommend not skimping on fuel quality; using low-grade gasoline can damage the catalytic converter and affect emissions. In short, China IV standards are a threshold—when buying a car, check the label in the vehicle manual to ensure compliance. Don't think this isn't important; it affects your annual car insurance and maintenance costs.
