How the EVAP System Works

Here's how the evaporative emissions and fuel system work on your car. The EVAP system is responsible for venting harmful gasoline vapours from the gas tank into the atmosphere, causing smog. It consists of the gas tank, filler neck, cap, vacuum lines, switching valves and the charcoal canister. When the tank is being refuelled, the fill check valve is opened to vent building fumes in the tank to the charcoal canister. The charcoal absorbs the vapour, and will release it into the engine through th

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• #flammable
• #vapour
• #gasoline