Combat rapid assembly fuel tank
Stored energy system for driving a turbine wheel
High pressure pumpless fuel system
Fuel storing device for an automobile
Fuel vapor management system for motor vehicles
Fuel tank assembly for volatile fuel
ApplicationNo. 561892 filed on 05/01/2000
US Classes:123/516, Air or fuel vapor purging system220/721, Pressure or temperature compensating220/723Internal bladder-like bag for contents
ExaminersPrimary: Moulis, Thomas N.
Attorney, Agent or Firm
International ClassF02M 037/04
AbstractA low fuel vapor emissions fuel system which reduces the need for FVCS and further obviates both the fuel pump and its return fuel line, composed generally of a rigid tank, a flexible fuel bladder within the tank, a filler pipe connecting between the fuel bladder and an exterior body location, a filler cap which removably seals the filler pipe, a fuel line from the fuel bladder to the engine, an air compression system for selectively pressurizing the cavity between the fuel bladder and the tank, and a fuel level sensor. In operation, when the ignition key is turned on, the air pump pressurizes the cavity between the tank and the fuel bladder. A program of the vehicle computer monitors the air pressure to provide a nominal fuel pressure for the engine. The air pump system further includes a vent valve, which also includes an over pressure relief valve. The filler door is interfaced with a sensor switch which is connected to a vent valve actuator; when the filler door is opened the vent valve opens to thereby relieve the pressure in the cavity. The filler cap is coupled with a cap actuator which prevents filler cap removal from the filler pipe unless fuel pressure in the fuel bladder has dropped to atmospheric pressure.