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Fuel Evaporation System: Description

The system is designed to prevent fuel vapor from entering the atmosphere. Fuel system is completely sealed and vented only through a carbon canister. System consists of pressure/vacuum relief fuel filler cap, a roll-over valve, charcoal canister, purge valve and various connecting hoses.

Fig 1: Fuel Evaporation System (240 Series, 740 Series & 760 GLE Turbo)
G37967Courtesy of VOLVO CARS OF NORTH AMERICA.