What do China 5 and China 6 mean for vehicles?
2 Answers
China 5 and China 6 refer to the national vehicle emission standards, which are respectively: 1. China 5 standard: The fifth phase national standard for vehicle pollutant emissions, with emission control levels equivalent to the European Union's Euro 5 emission standard currently in implementation; 2. China 6 standard: The sixth phase national standard for vehicle pollutant emissions. The China 5 standard requires that carbon monoxide emissions from gasoline vehicles do not exceed 1 gram per kilometer, while the China 6 standard requires carbon monoxide emissions from gasoline vehicles not to exceed 0.5 grams per kilometer. The emission standards include: China 1, China 2, China 3, China 4, China 5, and China 6. Vehicle emission standards refer to the limits set for harmful gases such as carbon monoxide, hydrocarbons, nitrogen oxides, particulate matter, and soot emitted from vehicle exhaust.
China 5 and China 6 refer to our country's motor vehicle emission standards, with China 5 being the fifth stage and China 6 being the sixth stage. Simply put, these are the national requirements limiting the concentration of pollutants in vehicle exhaust. China 6 is much stricter than China 5, for example, it requires a 30% reduction in carbon monoxide emissions and nearly a 40% reduction in nitrogen oxides, and also introduces new limits on particulate matter quantity. These standards directly compel automakers to improve engines and exhaust treatment systems, such as adding devices like particulate filters. I've observed that most new cars now meet the China 6b standard, which is quite helpful for improving urban air quality, as vehicle emissions are one of the contributors to smog. However, the upgrading of emission standards has also made the situation awkward for older vehicles, such as China 3 and China 4 cars being restricted in some cities.
