What is the national emission standard for a National VI engine?

[DiMarcus]

National VI engine refers to China's Stage 6 emission standard. The function of an engine is to convert the thermal energy of gasoline into mechanical energy by burning the expanding gas in a sealed cylinder to push the piston and perform work. Engine types include: 1. According to fuel usage: gasoline engines and diesel engines; 2. By stroke: four-stroke internal combustion engines and two-stroke internal combustion engines; 3. By cooling method: water-cooled engines and air-cooled engines; 4. By cylinder configuration: single-cylinder engines and twin-cylinder engines; 5. By intake system: naturally aspirated engines, turbocharged engines, and supercharged engines.