Bottom feed fuel bowl
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.
1. A fuel bowl for a carburetor, comprising:
a float chamber for holding a portion of liquid fuel for use by the carburetor;
a fuel inlet valve for supplying the liquid fuel to the float chamber;
one or more passages for directing the liquid fuel to a bottom portion of the float chamber;
a float for closing the fuel inlet valve when the float chamber is full; and
a ventilation chamber for allowing air and fuel vapors to exit the float chamber.
2. The fuel bowl of claim 1 , further including a fuel inlet cavity for receiving a fuel delivery insert that is configured to receive the fuel inlet valve.
3. The fuel bowl of claim 2 , wherein the fuel delivery insert includes a fuel inlet valve seat that extends from a top of the fuel delivery insert to a float cavity.
4. The fuel bowl of claim 3 , wherein the fuel inlet seat is configured to place the fuel inlet valve in operative contact with the float.
5. The fuel bowl of claim 3 , wherein the float is in mechanical communication with the fuel inlet valve by way of the float cavity.
6. The fuel bowl of claim 5 , wherein the float is biased toward a bottom of the float chamber by way of a spring disposed in float cavity.
7. The fuel bowl of claim 6 , wherein the float is configured to rise according to a quantity of the liquid fuel within the float chamber.
8. The fuel bowl of claim 7 , wherein the float is configured to operate the fuel inlet valve in response to the quantity of liquid fuel in the float chamber.
9. The fuel bowl of claim 2 , wherein the fuel delivery insert comprises the one or more passages.
10. The fuel bowl of claim 9 , wherein the fuel inlet valve seat is configured to align a fuel outlet of the fuel inlet valve with the one or more passages.
11. The fuel bowl of claim 1 , wherein the float chamber includes an interior shape configured to substantially eliminate fuel aeration therein.
12. The fuel bowl of claim 11 , wherein the interior shape is configured to allow substantially an entirety of the float chamber to fill with the liquid fuel.
13. The fuel bowl of claim 12 , wherein the interior shape is adapted to ensure that one or more calibrated orifices within the float chamber receive a steady supply of substantially unaerated liquid fuel.
14. The fuel bowl of claim 1 , wherein the ventilation chamber is configured to allow the float chamber to substantially fill with the liquid fuel.
15. The fuel bowl of claim 1 , wherein the ventilation chamber is configured to prevent the liquid fuel from being drawn from the float chamber into the carburetor.