Bottom feed fuel bowl
AssigneeK&N Engineering, Inc.
InventorJohn Kyle
Life of this patent
Estimating the term…
Abstract
An apparatus and method are provided for a fuel bowl to supply liquid fuel to a carburetor. The fuel bowl comprises a float chamber and a fuel inlet cavity which receives a fuel delivery insert. The fuel delivery insert receives a fuel inlet valve and comprises passages to direct incoming fuel to a bottom portion of the float chamber. A float comprises an elongate member rotatably hinged within a float cavity of the fuel delivery insert, such that the float rises according to a quantity of fuel within the float chamber. The fuel inlet valve supplies liquid fuel to the float chamber by way of the passages according to the operation of the float within the float chamber. A ventilation chamber allows air and fuel vapors to exit as liquid fuel enters the float chamber while preventing liquid fuel from entering into the carburetor.
Claims14
A fuel bowl assembly to supply liquid fuel to a carburetor, comprising:
- a rigid body comprising a float chamber, a fuel inlet cavity, and a mounting plate configured to fasten the fuel bowl assembly to the carburetor, such that the fuel bowl is in fluid communication with the carburetor;
- a fuel delivery insert configured to be fastened within the fuel inlet cavity, the fuel delivery insert configured to receive a fuel inlet valve and comprising at least one passage to direct incoming fuel to a bottom portion of the float chamber;
- a float comprising an elongate member rotatably hinged within a float cavity of the fuel delivery insert, such that the float rises according to a quantity of fuel within the float chamber, the float being biased toward the bottom portion of the float chamber by way of a spring operating on the elongate mount, wherein the rigid body further comprises one or more windows for viewing a position of the float within the float chamber;
- a ventilation chamber in fluid communication with the float chamber and the carburetor, such that air is allowed to exit as liquid fuel enters the float chamber, wherein the ventilation chamber is configured to prevent the liquid fuel from entering into the carburetor and to allow the float chamber to fill with liquid fuel while substantially preventing liquid fuel from being drawn into the carburetor;
- and
- wherein the fuel inlet valve supplies liquid fuel to the float chamber by way of the at least one passage according to the operation of the float within the float chamber.
A method for reducing aeration of liquid fuel within a fuel bowl of a carburetor, comprising:
- passing aerated fuel exiting a fuel inlet valve through one or more passages suitably dimensioned to allow the fuel to return to an unaerated state;
- wherein the fuel bowl is fastened to the carburetor by way of a plurality of fasteners and a spacer;
- directing unaerated liquid fuel from the one or more passages into a bottom portion of a float chamber;
- filling the entirety of the float chamber with the unaerated liquid field;
- venting air and fuel vapors within the float chamber into a ventilation chamber;
- and
- allowing the air and fuel vapors to pass from the ventilation chamber into the carburetor.
Dependencies are inferred from the claim text.