Fuel Tank: Description and Operation

OPERATION





The fuel tank is equipped with fuel and vapor controls that allow the vehicle to pass a full 360° rollover without fuel leakage.

The fuel filler cap also acts as a pressure/vacuum valve. When air pressure inside the fuel tank gets too high or too low, the fuel cap valve opens to relieve the difference in pressure.

An evaporation control system restricts fuel evaporation into the atmosphere and reduces unburned hydrocarbons. Vapors from the fuel tank are collected in a charcoal filled canister. The vapors are held in the canister until the engine is operating. When the engine is running, the vapors are drawn through the intake manifold into the combustion chambers.

The ORVR control valve manages the flow of vapor during refueling. It also controls maximum fuel volume of the fuel tank.