What are the diesel vehicle exhaust emission standards?

[DeLaura]

Diesel vehicle exhaust HC+Nox emission standards for Euro I, Euro II, Euro III, and Euro IV are 1.36%, 0.9%, 0.56%, and 0.3% respectively; diesel vehicle exhaust CO emission standards for Euro I, Euro II, Euro III, and Euro IV are 2.72%, 1.0%, 0.64%, and 0.5% respectively; diesel vehicle exhaust PM emission standards for Euro I, Euro II, Euro III, and Euro IV are 0.196%, 0.1%, 0.05%, and 0.025% respectively. Vehicle exhaust emission standards are divided into gasoline vehicle standards and diesel vehicle standards. Gasoline vehicle exhaust HC emission standards for Euro I, Euro II, Euro III, and Euro IV are 1.1%, 1.1%, 0.66%, and 0.46% respectively; gasoline vehicle exhaust CO emission standards for Euro I, Euro II, Euro III, and Euro IV are 4.5%, 4%, 2.1%, and 1.5% respectively; Gasoline vehicle exhaust NOx emission standards for Euro I, Euro II, Euro III, and Euro IV are 8%, 7%, 5%, and 3.5% respectively; gasoline vehicle exhaust PM emission standards for Euro I, Euro II, Euro III, and Euro IV are 0.36%, 0.15%, 0.1%, and 0.02% respectively. The importance of vehicle exhaust emission testing: The main pollutants in vehicle exhaust are hydrocarbons, nitrogen oxides, carbon monoxide, sulfur dioxide, lead compounds, benzopyrene, and particulate matter; these pollutants cause significant harm to human health and the ecological environment. For the ecological environment, pollutants such as nitrogen oxides released during gasoline combustion are the main culprits of global warming; for humans, long-term inhalation of vehicle emissions can damage human cells, reduce immunity, and easily cause respiratory and cardiovascular diseases. In some cases, vehicle emissions can easily transform into carcinogenic substances.