The intake air quality sensor is used to detect very low concentration gasoline and diesel exhaust. When the car enters a highly polluted area, the air quality sensor automatically closes the intake valve to provide a healthy, safe and comfortable environment for the occupants. The earth extends the life of the cabin air filter. When the air quality improves, the air quality sensor will automatically reopen the intake pipe to prevent the driver from fogging the window due to forgetting to reopen the intake port, resulting in reduced visibility or a decrease in the concentration of oxygen in the passenger compartment. drowsiness.