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 assembly to supply liquid fuel to a carburetor, comprising:
a rigid body comprising a float chamber and a fuel inlet cavity;
a fuel delivery insert configured to be fastened within the fuel inlet cavity;
an inlet valve seat extending from the top of the fuel delivery insert to a float cavity of the fuel delivery insert;
a float rotatably hinged within the float chamber;
a fuel inlet valve operably coupled with the float to allow liquid fuel to enter a bottom portion of the float chamber; and
a ventilation chamber configured to allow air to exit the float chamber as fuel level rises.
2 . The fuel bowl of claim 1 , wherein the fuel delivery insert receives a fuel inlet valve and includes at least one passage to direct fuel to a bottom portion of the float chamber.
3 . The fuel bowl of claim 1 , wherein the float rises according to a quantity of fuel within the float chamber.
4 . The fuel bowl of claim 3 , wherein the float is biased toward the bottom of the float chamber by a spring.
5 . The fuel bowl of claim 1 , wherein the ventilation chamber allows air to exit the float chamber as liquid fuel enters the float chamber.
6 . The fuel bowl of claim 5 , wherein the ventilation chamber prevents the liquid fuel from entering directly into the carburetor.
7 . The fuel bowl of claim 1 , wherein the float chamber is configured to be completely filled with liquid fuel so as to eliminate fuel aeration within the float chamber.
8 . The fuel bowl of claim 1 , wherein the float chamber is configured to ensure that one or more calibrated orifices disposed in the float chamber receive a steady supply of substantially unaerated liquid fuel.
9 . The fuel bowl of claim 1 , wherein the fuel delivery insert includes at least one passage in fluid communication with the inlet valve seat and a bottom portion of the float chamber.
10 . The fuel bowl of claim 9 , wherein the at least one passage is disposed along a top and a back side of the fuel delivery insert before extending to the bottom portion.
11 . The fuel bowl of claim 10 , wherein the at least one passage separates into two individual passages that extend along the bottom of the fuel delivery insert to the bottom portion.
12 . A fuel delivery insert for a fuel bowl assembly of a carburetor, comprising:
a solid body configured to be fastened within a fuel inlet cavity of the fuel bowl assembly;
a float cavity for hingedly receiving a float;
an inlet valve seat extending from the top of the solid body to the float chamber; and
at least one passage for directing liquid fuel from the inlet valve seat to a bottom portion of the fuel bowl.
13 . The fuel delivery insert of claim 12 , wherein the at least one passage is disposed along a top and a back side of the solid body before extending to the bottom portion.
14 . The fuel delivery insert of claim 13 , wherein the at least one passage separates into two individual passages that extend along the bottom of the solid body to the bottom portion.