What is the function of a car's carbon canister?

[VonEloise]

The functions of a car's carbon canister are as follows: 1. Fuel saving: The carbon canister is filled with highly adsorbent activated carbon. Excess fuel vapor from the fuel tank is no longer released into the atmosphere but is instead directed into the activated carbon canister through a pipe, where the activated carbon adsorbs the fuel vapor. When the car is in motion, the carbon canister solenoid valve opens at the appropriate time to reintroduce the absorbed fuel vapor into the intake manifold, thereby saving fuel. 2. Reducing pollutant emissions: When the engine starts, the solenoid valve between the activated carbon canister and the intake manifold opens. The gasoline vapor inside the activated carbon canister is drawn into the cylinder by the vacuum in the intake pipe along with clean air to participate in combustion. This process helps reduce emissions.