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US 5,666,927 AGranted
Fuel/air supply system for a fuel injector and methods of operation
AssigneeSiemens Automotive Corporation
InventorsJeffrey B. Pace, Vernon R. Warner
Life of this patent
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AssigneeSiemens Automotive Corporation
InventorsJeffrey B. Pace, Vernon R. Warner
Estimating the term…
The fuel and air supply system of the present invention provides fuel from a fuel pump at a first pressure upstream of a pressure reducer, fuel being provided directly to the fuel injector at a reduced pressure on the downstream side of the pressure reducer. A bypass line in communication with the fuel line upstream of the pressure reducer provides fuel to an air reservoir at the first pressure. The air reservoir lies in communication with a porous member(s) in the fuel injector in an air inlet to a fuel volume within the injector upstream of the pressure reducer. Upon flow of fuel into the air reservoir and closure of normally open fuel and air valves in the reservoir, air at the first pressure is supplied the porous member(s), creating a pressure differential across the member(s), causing air to flow through the porous member(s) to form air bubbles in the fuel volume for two-phase flow through the fuel injector orifice. The air flows for a predetermined time until the reservoir fills with fuel which precludes further air flow into the injector. Upon shutdown of the engine, the valves in the air reservoir open, draining the fuel from the air reservoir and enabling air at atmospheric pressure to enter the reservoir, returning the system for reuse upon engine startup.
A system for supplying a two-phase air/fuel dispersion to an engine comprising:
A system for supplying a two-phase air/fuel dispersion to an engine comprising:
In a fuel injection system for a combustion engine having an injector, an orifice in said fuel injector, a fuel volume upstream of said orifice for containing fuel, an air inlet to said fuel volume having a member therein admitting air into said volume causing the formation of air bubbles in the fuel in said fuel volume, and a valve for opening and closing the orifice to flow an air bubble/fuel dispersion through said orifice when said valve is opened, a method of supplying fuel and air to the injector, comprising the steps of:
Dependencies are inferred from the claim text.