Evaporative Emission Control Canister: Description and Operation

EVAP Charcoal Canister:

DESCRIPTION
The 2.0 liter rectangular designed Evaporative Emissions (EVAP) Charcoal Canister is filled with activated carbon that stores vapor transferred from the fuel tank. Integral to the canister is a trap which collects any liquid fuel (condensed vapor) from entering and contaminating the charcoal bed. The liquid is purged back to the tank whenever there is a vacuum exerted on the tank. The canister also has a volume compensator that maintains a tightly packed charcoal bed as the canister expands and contacts.

CANISTER PORTS
The three ports coming off the charcoal canister are identified as:
a. Fuel Vapor Port (from fuel tank)
b. EVAP Port (from engine mounted solenoid)
c. Atmospheric Port (from fresh air source via the body mounted Air Separator)