Evaporative Emission Control Canister: Description and Operation

Carbon Canisters, Typical:

PURPOSE
Fuel vapors from the fuel tank and air cleaner assembly are stored in the carbon canister.

OPERATION
When the vehicle is operated, the vapors will purge from the canister into the engine for consumption.

CONSTRUCTION
Contained in the evaporative emissions canister are 925ml (2 pints) of activated carbon, referred to as the carbon bed. Activated carbon has the ability to purge (release) stored fuel vapors when exposed to fresh air flow.