Evaporative Emission Control Canister: Description and Operation

Charcoal Canister:

DESCRIPTION
The 1.5 liter cylindrical inverted canister is filled with activated carbon that stores vapor transferred from the fuel tank. A single tube extends down the center of the canister to a liquid trap at the canister base. Fuel vapor/condensed liquid form the tank enters a port on the canister cover. The vapor/liquid travels down a center tube where the vapor is absorbed by the charcoal and the liquid is stored in the lower well. Both are contained until purged through the normal combustion process.

CANISTER PORTS
The three ports coming off the canister are identified as:

a. Fuel Vapor Port (from fuel tank)
b. EVAP Port (purge line to throttle body)
c. Atmospheric Port (from fresh air source via the body mounted vent hose)

EVAP SOLENOID
The Powertrain Control Module controlled, integrally mounted solenoid regulates vapor flow from the canister to the throttle body.