Internal-combustion engines – Charge forming device – Fuel flow regulation between the pump and the charge-forming...
Patent
1994-09-22
1998-03-31
Miller, Carl S.
Internal-combustion engines
Charge forming device
Fuel flow regulation between the pump and the charge-forming...
123509, 417395, 417390, F02M 3704
Patent
active
057326843
ABSTRACT:
An automotive fuel delivery system for an internal combustion engine has a saddle type fuel tank with two lobes, a primary lobe and a secondary lobe, straddling vehicle components therebetween. A primary fuel pump is mounted in the primary lobe with a fuel delivery line extending therefrom for carrying pressurized fuel from the primary fuel pump to the engine, and a pressure actuated auxiliary fuel pump is mounted in the secondary lobe for pumping fuel therefrom to the primary lobe. The auxiliary fuel pump has a drive chamber for receiving pressurized fuel from the input line to urge a drive diaphragm to an extended position, and high hysteresis relief valve means for controllably releasing pressurized fuel from the drive chamber to the secondary lobe to allow the drive diaphragm to contract to a retracted position. A pumping chamber in the auxiliary pump has an auxiliary pumping diaphragm, mechanically connected to the drive diaphragm, with intake and output positions corresponding to the retracted and extended positions of the drive diaphragm, respectively. The pumping chamber also has an inlet in fluid communication with the fuel tank for allowing fuel flow from the fuel tank into the pumping chamber, and an outlet in fluid communication with the primary lobe for allowing fuel flow from the pumping chamber to the primary lobe.
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Ford Global Technologies Inc.
Kelley David B.
Miller Carl S.
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