Enhanced EVAP

The main purpose of the Enhance EVAP system is to prevent fuel vapors from dispersing into the atmosphere. The Enhanced Evaporative Emission ([1][2]EVAP) control system stores vapor generated by the vehicle and regulates its consumption during normal driving operation. The basic system used on all vehicles is the charcoal canister storage method. This method transfers fuel vapor from the fuel tank to an activated carbon (charcoal) storage device (canister) to hold the fuel vapors when the engine is not operating. When the engine is running, the fuel vapor is purged from the canister by intake airflow and consumed during the normal combustion process.