Liquid Vapor Separator: Description and Operation
DESCRIPTIONNOTE: Vehicles equipped with a 68 liter (18 gallon) fuel tank require the use of two evaporative emission valves. Vehicles equipped with a 61 liter (16 gallon) fuel tank use only one evaporative emission valve.
The evaporative emission valve performs its function within the evaporative emissions system as follows:
^ Fuel vapor in the fuel tank is vented to the EVAP canister through the evaporative emission valve and the fuel tank vent tube .
^ The evaporative emission valve is mounted in a rubber grommet at a central location in the upper surface of the fuel tank.
^ A vapor space between the fuel level and the fuel tank upper surface is combined with an orifice and float shut-off valve in the evaporative emission valve to prevent liquid fuel from passing to the evaporative emission tube shut off valve and the evaporative emissions canister.
^ The vapor space also allows for thermal expansion of the fuel.