Internal-combustion engines – Charge forming device – Fuel flow regulation between the pump and the charge-forming...
Patent
1997-06-02
1998-11-10
Moulis, Thomas N.
Internal-combustion engines
Charge forming device
Fuel flow regulation between the pump and the charge-forming...
123541, F02M 3704, F02M 1500
Patent
active
058329030
ABSTRACT:
A fuel supply system for a marine propulsion system having an electronically controlled fuel injection system eliminates the need for a vapor separator. The system pumps an excessive amount of fuel through a plumbed fuel supply loop and cools recirculated fuel to cool all the components in the plumbed fuel supply loop, i.e. a continuous duty, constant displacement fuel pump; a pressure regulator; and a water separating fuel filter. Recirculated fuel flows from the pressure regulator to the water separating fuel filter as does make-up fuel from a fuel tank. The fuel stream from the water separating fuel filter flows to the low-pressure side of the fuel pump, which pumps the fuel through the plumb fuel supply loop. A fuel injection portion of the fuel flows to the engine for combustion, while the remaining portion of the fuel is recirculated. The recirculated portion of the fuel is cooled, preferably using a water-cooled heat exchanger. The cooled, recirculated fuel passes through the pressure regulator and repeats recirculation to the water separating fuel filter.
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Electronic Fuel Injection (EFI), Mercruiser Service Manual, Part No. 90-806535940, Chapter 5-E (admitted prior art).
Electronic Fuel Injection Multi-Port (EFI/MP), Mercruiser Service Manual, Part No. 90-823225, Chapter 5F (admitted prior art).
Baer Timothy M.
Clarkson Daniel E.
Hines Grant W.
Horak James Michael
Jaeger Matthew W.
Brunswick Corp.
Moulis Thomas N.
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