Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1995-03-02
1996-12-03
Miller, Carl S.
Internal-combustion engines
Charge forming device
Fuel injection system
123463, F02M 4100
Patent
active
055797393
ABSTRACT:
A no-return fuel system for an automotive engine with fuel injectors. The system has an electric fuel pump received in a fuel tank and supplying fuel at a substantially constant pressure to a demand regulator which delivers fuel to the fuel injectors under varying engine operating conditions. The fuel is delivered to the demand regulator at a substantially constant pressure by varying the speed of the fuel pump in response to changing fuel demand of the engine and/or by by-passing some of the fuel supplied by the pump through a by-pass regulator or relief valve. The demand regulator has a housing with a flexible diaphragm between first and second chambers. The admission of fuel to the first chamber is controlled by a valve associated with the diaphragm and fuel from this chamber is supplied to the engine injectors. Under some operating conditions, the valve closes and if the fuel trapped between the valve and the injectors expands, the diaphragm is displaced to accommodate the expansion and accumulate the expanded fuel. If the pressure of the trapped fuel increases sufficiently to a predetermined maximum value, the valve opens to limit its maximum pressure to the predetermined value. In some applications, the second chamber communicates with the engine air intake manifold so that under normal operating conditions, fuel is supplied to the engine injectors with a substantially constant pressure drop across the injectors.
REFERENCES:
patent: 4248194 (1981-02-01), Drutchas
patent: 4608957 (1986-09-01), Kemmner
patent: 4697995 (1987-10-01), Tuckey
patent: 4741315 (1988-05-01), Fehrenbach
patent: 4800859 (1989-01-01), Sagisaka
patent: 4825835 (1989-05-01), Deweerot
patent: 4919102 (1990-04-01), Iwaduchi
patent: 4926829 (1990-05-01), Tuckey
patent: 5148792 (1992-09-01), Tuckey
patent: 5265644 (1993-11-01), Tuckey
patent: 5337718 (1994-08-01), Tuckey
patent: 5361742 (1994-11-01), Briggs
patent: 5406922 (1995-04-01), Tuckey
patent: 5429094 (1995-07-01), Akiba
patent: 5458104 (1995-10-01), Tuckey
Oberheide G. Clarke
Tuckey Charles H.
Miller Carl S.
Walbro Corporation
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