Vacuum bleed and flow restrictor fitting for fuel injected engines with vapor separator
Patent
·
OSTI ID:5452277
This patent describes a marine fuel system for an internal combustion engine having an induction system for supplying combustion air to the engine and fuel injection means for mixing fuel with the combustion air, and having a remote fuel tank. The fuel system comprising a first fuel pump connected to draw fuel from the tank and a second fuel pump connected to receive fuel from the first pump and provide fuel under pressure to the fuel injection means, a vapor separator connected between the first and second fuel pumps to remove fuel vapors supplied to the second pump, and a vapor supply line connected between the vapor separator and the induction system to supply the vapor removed from the fuel to the induction systems, means connected in the vapor supply line limiting fuel vapor supplied from the vapor separator to the induction system at peak vacuum from the induction system during rapid engine deceleration to prevent an overly rich fuel-air mixture in the induction system otherwise causing rough idling or stalling. The last mentioned means comprises in combination vacuum bleed orifice means in the vapor supply line partially venting vacuum from the induction system to atmosphere to limit the peak vacuum applied to the vapor separator from the induction system, and flow restrictor means in the vapor supply line limiting the volume of flow of fuel vapor from the vapor separator to the induction system. The vacuum bleed orifice means and the flow restrictor means are at all times in continuous communication with each other and with the vapor separator and with the induction system.
- Assignee:
- Brunswick Corp., Skokie, IL
- Patent Number(s):
- US 4856483
- Application Number:
- PPN: US 7140438A
- OSTI ID:
- 5452277
- Country of Publication:
- United States
- Language:
- English
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