Electronic evaporative emissions management system

An evaporative emissions control system configured to recapture and recycle emitted fuel vapor in a vehicle fuel tank having liquid fuel, the evaporative emissions control system comprising:

• a purge canister adapted to collect fuel vapor emitted by the fuel tank and to subsequently release the fuel vapor to an engine;
• a fuel level sensor that communicates a signal indicative of an amount of fuel in the fuel tank;
• a first vent tube disposed in the fuel tank and that terminates at a first vent opening;
• a second vent tube disposed in the fuel tank and that terminates at a second vent opening;
• a first vent valve fluidly coupled to the first vent tube and configured to selectively open and close a first port that connects the first vent valve to the first vent tube;
• a second vent valve fluidly coupled to the second vent tube and configured to selectively open and close a second port that connects the second vent valve to the second vent tube;
• a vent shut-off assembly that selectively opens and closes the first and second valves to provide overpressure and vacuum relief for the fuel tank;
• and
• a controller that receives the signal from the fuel level sensor and (i) determines whether a refueling event is occurring, (ii) actuates the first and second valves closed a first time based on a first fill level being reached;
• (iii) actuates the first and second vent valves open after a predetermined time to allow for a resumption of fill, (iv) determines whether a subsequent fill level is reached, and (v) closes the first and second vent valves closed a second time based upon the subsequent fill level being reached.

An evaporative emissions control system configured to recapture and recycle emitted fuel vapor in a vehicle fuel tank having liquid fuel, the evaporative emissions control system comprising:

• a purge canister adapted to collect fuel vapor emitted by the fuel tank and to subsequently release the fuel vapor to an engine;
• an accelerometer that senses acceleration;
• a first vent tube disposed in the fuel tank and that terminates at a first vent opening;
• a second vent tube disposed in the fuel tank and that terminates at a second vent opening;
• a first vent valve fluidly coupled to the first vent tube and configured to selectively open and close a first port that connects the first vent valve to the first vent tube;
• a second vent valve fluidly coupled to the second vent tube and configured to selectively open and close a second port that connects the second vent valve to the second vent tube;
• a vent shut-off assembly that selectively opens and closes the first and second valves to provide overpressure and vacuum relief for the fuel tank;
• and
• a control module that regulates operation of the vent shut-off assembly based on operating conditions, wherein the control module (i) estimates a location of liquid fuel based on the sensed acceleration from the accelerometer and (ii) determines which vent opening of the first and second vent openings is one of submerged and about to be submerged based on the estimated location of liquid fuel, and (iii) closes the vent valve associated with the determined vent opening.