Evaporative Control (EVAP) System

Auto Systems and Repair

The evaporative control (EVAP) system captures any raw fuel evaporating from the fuel storage system. Under precise operating conditions dictated by engine temperature, speed, and load, the EVAP system purges these captured fuel vapors back into the combustion process.


Fuel Tank
The fuel tank stores the fuel. Inside the tank, there is a float that signals the computer systems and/or fuel gauge as to how much fuel is in the tank. On newer vehicles, the fuel pump, fuel, filter, and fuel pressure regulator may also be housed inside the fuel tank.


Canister Purge Valve
The canister purge valve allows stored fuel vapors in the containment canister to be recycled back into the engine combustion process when necessary. More >>


Key Component - Charcoal Canister

In order to prevent fuel vapors from escaping into the atmosphere, a brick of charcoal inside the charcoal canister collects the vapors and later purges them so they can burn in the combustion process. More >>


Additional Key Parts

Canister purge valveCanister vent valveCharcoal canister


 

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