The fuel evaporation system is designed to keep fuel and crankcase vapor from escaping into the atmosphere. The fuel tank venting is designed to ensure vapors are vented through the system even when the vehicle is parked on an inclined surface.
When the fuel tank vapor pressure exceeds a preset limit, the pressure relief valve opens and vapor flows into canister for storage. The purge control valve limits maximum purge airflow rate.
Sunday, January 10th, 2010 AT 7:31 AM