ORVR Fuel System

ORVR Fuel System:

The Evaporative Emission (EVAP) control 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, which stores the vapors when the vehicle is not operating. When the engine is running, the fuel vapor is purged from the carbon element by the engine vacuum and is consumed in the normal combustion process. The enhanced EVAP system uses software within the Engine Control Module (ECM) and several additional components that allow the ECM to monitor the system performance and to perform the comprehensive on-board diagnostics.

The enhanced EVAP system consists of the following components:
^ The EVAP canister vent valve
^ The EVAP canister purge valve
^ The fuel tank pressure sensor
^ The EVAP canister
^ The fuel pipes and hoses
^ The fuel vapor line
^ The purge line
^ The vent line
^ The fuel tank
^ The fuel filler cap