How to Distinguish Between National 3, National 4, National 5, and National 6 Diesel Vehicles?
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To determine whether a vehicle meets National 4 or National 5 standards, you can refer to the vehicle's fuel consumption label. Below is an introduction to National 4 standards: Introduction: The National 4 emission standard is the fourth phase of China's motor vehicle pollutant emission standards. The main pollutants emitted by vehicles include HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter). By applying technologies such as improved catalytic converter active layers, secondary air injection, and exhaust gas recirculation systems with cooling devices, the standard aims to control and reduce vehicle emissions to below specified limits. Implementation Date: In March 2009, the Industrial Policy Department of the Ministry of Industry and Information Technology convened a meeting with relevant companies to discuss the implementation of vehicle emission standards (National 3, National 4, and National 5). Major automotive companies and engine manufacturers attended the meeting. On December 21, 2010, the General Office of the Ministry of Environmental Protection of the People's Republic of China responded to the China Association of Automobile Manufacturers with the document 'Reply on the Implementation Date of the National 4 Emission Limits for Motor Vehicles' (Huanban Han [2010] No. 1390).
