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

[ConnorDella]

The function of a car's carbon canister solenoid valve is to adsorb and filter gasoline vapors inside the fuel tank. It controls the entry of fuel vapors into the engine for combustion through the solenoid valve, thereby reducing fuel consumption and preventing excessive fuel tank pressure. A faulty carbon canister solenoid valve not only increases fuel consumption but also affects the normal operation of the car's engine. Methods to check the condition of the carbon canister solenoid valve: 1. If gas sprays out when opening the fuel tank cap, it indicates a damaged solenoid valve; 2. If gasoline vapors or dripping oil appear at the carbon canister's atmospheric vent, it indicates a damaged solenoid valve; 3. Symptoms like poor acceleration, jerking, unstable idle speed (fluctuating high and low), indicate a damaged solenoid valve; 4. If the engine fails to start after stalling or there are abnormal noises while driving, it indicates a damaged solenoid valve.