Gaseous fuel and air mixing venturi insert device for carburetor
AssigneeContinental Controls Corporation
InventorKristian W. Yates
Life of this patent
Estimating the term…
Abstract
A gaseous fuel and air mixing venturi device is adapted for installation in a gaseous fuel carburetor and has a venturi body defining annular inner and outer venturi passageways which each have a throat of reduced cross-sectional area and have inlet ends in communication with an air inlet of the carburetor. A fuel inlet is configured for connection to a fuel port of the carburetor, and communicates with a plurality of fuel supply ports in the body communicating radially with the inner and outer venturi passages to mix with the air flowing in the passageways.
Claims16
A gaseous fuel and air mixing venturi device for a gaseous fuel carburetor, comprising:
- a venturi body having at least two venturi passageways, each passageway having an air inlet end, an air-fuel mixture outlet end, and a venturi throat of reduced cross-sectional area;
- the venturi body being of predetermined shape and dimensions adapted for seating engagement in a carburetor housing between the carburetor air inlet and air-fuel mixture outlet such that the air inlet ends of the venturi passageways communicate with the air inlet of the carburetor and the air-fuel mixture outlets of the venturi passageways communicate with the air fuel mixture outlet of the carburetor, the venturi body having a fuel inlet chamber with an inlet configured for communication with a gaseous fuel inlet port of the carburetor;
- and
- the body having a plurality of fuel supply ports communicating with the fuel inlet chamber for supplying fuel to throat areas of the venturi passageways to mix with the air flowing in the venturi passageways.
A gaseous fuel and air mixing venturi device for a gaseous fuel carburetor, comprising:
- a venturi body having at least one venturi passageway having an air inlet end, an air-fuel mixture outlet end, and a venturi throat of reduced cross-sectional area;
- the venturi body being of predetermined shape and dimensions adapted for seating engagement in a carburetor housing between the carburetor air inlet and air-fuel mixture outlet such that the air inlet end of the venturi passageway communicates with the air inlet of the carburetor and the air-fuel mixture outlet of the venturi passageway communicates with the air fuel mixture outlet of the carburetor, the venturi body having a fuel inlet chamber with an inlet configured for communication with a gaseous fuel inlet port of the carburetor;
- the body having a plurality of fuel supply ports communicating with the fuel inlet chamber for supplying fuel in a radial direction only to throat area of the venturi passageway to mix with the air flowing in the venturi passageway;
- and
- wherein the venturi body comprises a central hub containing the fuel inlet chamber, and an annular member secured to the central hub with an annular space between the annular member and the central hub defining the venturi passageway, the annular member having an annular gas supply chamber communicating with the fuel inlet chamber, the central hub having a first ring of spaced fuel supply ports spaced around the hub for directing fuel radially outward from fuel inlet chamber into the venturi passageway, and the annular member having an inner wall having a second ring of spaced fuel supply ports configured for directing fuel radially inward from the annular gas supply chamber into the inner venturi passageway.
A method of retrofitting a carburetor with an air-fuel mixing venturi insert device, comprising:
- removing an existing cover plate and air-fuel mixing device from a carburetor to leave a cavity and expose at least one air-fuel mixer seating rim of the carburetor;
- placing an air-fuel mixing venturi insert device having at least two annular venturi passageways into the cavity left by removal of the prior air-fuel mixing device, with a fuel inlet port of the air-fuel mixing venturi insert device aligned with a fuel inlet port of the carburetor and an outer rim of the air-fuel mixing venturi insert device aligned and engaged with the air-fuel mixer seating rim of the carburetor;
- and
- re-attaching the existing cover plate to the carburetor over the air-fuel mixing venturi insert device with a biasing spring acting extending between a spring seat on the inner surface of the cover and a spring seating recess at the end of the air-fuel mixing venturi insert device.
Dependencies are inferred from the claim text.