How to Distinguish Between China III and China IV Emission Standards?

[Adam]

China III and China IV can be distinguished by the following methods: 1. Identify through the engine nameplate, which will have clear markings. The last three digits of the engine model VE2 indicate China III, while VE3 indicates China IV; 2. Check the vehicle's factory certificate; 3. Identify through the vehicle identification number (VIN) under the windshield. The tenth digit of the VIN represents the production date of the vehicle, following a 30-year cycle code where the letter O and the number 10 are never used. China III generally refers to the National Phase III Motor Vehicle Pollutant Emission Standards, equivalent to the Euro III emission standards. China IV generally refers to the National Phase IV Motor Vehicle Pollutant Emission Standards. The main pollutants emitted by vehicles include HC (Hydrocarbons), NOx (Nitrogen Oxides), CO (Carbon Monoxide), and PM (Particulate Matter). Through the application of technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices, these standards control and reduce vehicle emissions to below specified levels.