Gas and liquid contact apparatus – Fluid distribution – Systems
Reexamination Certificate
2000-02-10
2001-09-18
Chiesa, Richard L. (Department: 1724)
Gas and liquid contact apparatus
Fluid distribution
Systems
C123S439000, C123S470000, C261S076000, C261SDIG003, C261SDIG007
Reexamination Certificate
active
06290215
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a premixing chamber having fuel injectors, an air intake, a laminar air flow wing and air throttle valves that supply air and fuel to the manifold of an engine for mixing.
Carburetors that deliver a fuel-air mixture to the combustion chamber of an engine are very well known. Typically, the carburetor has a chamber housing with at least one air intake port and a fuel intake. When a fuel injector is used, the fuel is introduced under pressure into the housing to form the fuel-air mixture which mixture is in communication with the engines combustion chamber.
In one prior art invention, the combustible mixture of air and minute fuel droplets is accurately controlled over the operating range of the engine. To provide this control a constricted zone is used to increase the velocity of the mixture to sonic speed. Downstream of the sonic zone is a supersonic zone which accelerates the mixture from the sonic zone to a supersonic velocity without substantial turbulent flow. This accelerated mixture is then decelerated to a subsonic velocity in a subsonic zone to produce a shock where the fuel droplets subdivide and are uniformly distributed before the mixture is supplied to the engine cylinders.
Another prior art fuel flow proportioning valve of the variable area venturi type carburetor uses a movable wall to vary the venturi area. Part of the flow fuel tubes are discharged adjacent the venturi throat and the remaining proportion of fuel is returned to the pump. In one variable venturi carburetor movable members are linked with and driven by the accelerating pedal to vary the area of the throat opening.
Another carburetor variety has a fuel spray bar extending across the throttle with transversely oppositely disposed fuel orifices. This same carburetor has a pair of venturi plates mounted for pivotal movement about individual axes moving relative to a bar to define an adjustable throat.
With a carburetor throttle valve apparatus invention a pair of spherical segments with center openings are attached to either side of an existing throttle plate and throttle shaft. These segments have grooves on one side to fit the throttle shaft which has a generally lenticular shape to act as an air foil.
A sonic carburetor invention has a air-fuel mixing passageway with a fuel dispersion bar in the passageway. A plurality of fuel dispersion openings in the bar inject fuel into the passageway.
Still another invention discloses a variable venturi-type carburetor having a suction piston with a tip face.
Another more recent carburetor invention provides for direct mechanical control of both the airflow valve and the fuel dispersion assembly. A three bar linkage connects the airflow valve to the fuel dispersion assembly. The operation of a throttle valve in the carburetor affects the position of the airflow valve.
DESCRIPTION OF THE PRIOR ART
Carburetors and fuel injector have been constructed in a variety of different ways. For example, in the U.S. Pat. No. 3,778,038 to Eversole et al there is disclosed a combustible mixture of air and minute fuel droplets which is accurately controlled over the operating range of the engine. To provide this control a constricted zone is used to increase the velocity of the mixture to sonic speed. Downstream of the sonic zone is a supersonic zone which accelerates the mixture from the sonic zone to a supersonic velocity without substantial turbulent flow. This accelerated mixture is then decelerated to a subsonic velocity in a subsonic zone to produce a shock where the fuel droplets subdivide and are uniformly distributed before the mixture is supplied to the engine cylinders.
U.S. Pat. No. 3,931,368 to Barker et al. discloses a fuel flow proportioning valve of the variable area venturi type carburetor using a movable wall to vary the venturi area. Part of the flow fuel tubes are discharged adjacent the venturi throat and the remaining proportion of fuel is returned to the pump.
U.S. Pat. No. 4,056,583 to Shinoda et al. discloses a variable venturi carburetor having movable members linked with and driven by the accelerating pedal to vary the area of the throat opening.
U.S. Pat. No. 4,283,355 to Herd, Jr., et al. discloses a fuel spray bar extending across the throttle with transversely oppositely disposed fuel orifices. This same carburetor has a pair of venturi plates mounted for pivotal movement about individual axes moving relative to a bar to define an adjustable throat.
U.S. Pat. No. 4,420,438 to Goosen discloses a carburetor throttle valve apparatus invention with a pair of spherical segments with center openings attached to either side of an existing throttle plate and throttle shaft. These segments have grooves on one side to fit the throttle shaft which has a generally lenticular shape to act as an air foil.
U.S. Pat. No. 4,482,507 to Kendig discloses a sonic carburetor invention with an air-fuel mixing passageway and a fuel dispersion bar in the passageway. A plurality of fuel dispersion openings in the bar inject fuel into the passageway.
U.S. Pat. No. 4,493,804 to Nakamura et al. discloses a variable venturi-type carburetor having a suction piston with a tip face.
U.S. Pat. No. 5,126,079 to Nagamatsu discloses a direct mechanical control of both the airflow valve and the fuel dispersion assembly. A three bar linkage connects the airflow valve to the fuel dispersion assembly. The operation of a throttle valve in the carburetor affects the position of the airflow valve.
In the present invention a premixing chamber has multiple fuel injectors, a controlled air throttle, a laminar wing and two throttle valves pivotally mounted parallel to the laminar wing, all as will be detailed in the specification that follows hereafter.
SUMMARY OF THE INVENTION
This invention relates to a fuel-air premixing chamber having two opposed fuel injectors downstream of two pivotally mounted air throttle valves which can engage an air flow wing to control the laminar air flow input of the chamber.
It is the primary object of the present invention to provide for an improved fuel-air premixing chamber.
Another object is to provide for such a fuel-air premixing chamber that has two opposed fuel injectors and related air throttle valves to control the flow of air.
These and other objects and advantages of the present invention will become apparent to readers from a consideration of the ensuing description and the accompanying drawings.
REFERENCES:
patent: 2525083 (1950-10-01), Stresen-Reuter
patent: 3778038 (1973-12-01), Eversole et al.
patent: 3931368 (1976-01-01), Barker et al.
patent: 3965221 (1976-06-01), Englert et al.
patent: 4021513 (1977-05-01), Ullman
patent: 4056583 (1977-11-01), Shinoda et al.
patent: 4125095 (1978-11-01), Wilson
patent: 4283355 (1981-08-01), Herd, Jr. et al.
patent: 4289104 (1981-09-01), Takada et al.
patent: 4308835 (1982-01-01), Abbey
patent: 4327675 (1982-05-01), Takeda
patent: 4420438 (1983-12-01), Goosen
patent: 4482507 (1984-11-01), Kendig
patent: 4493804 (1985-01-01), Narkamura et al.
patent: 5126079 (1992-06-01), Nagamatsu
patent: 5809972 (1998-09-01), Grant
patent: 55-49566 (1980-04-01), None
Chiesa Richard L.
McGlynn Joseph H.
Patent & Trademark Services
Zack Thomas
LandOfFree
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