Carburetor including one-piece fuel-metering insert
AssigneeBriggs & Stratton Corporation
InventorsBrett W. Jury, David D. Roth
Life of this patent
Estimating the term…
Abstract
A carburetor includes a body, a throttle valve positioned in an air/fuel passageway in the body, a fuel bowl coupled to the body, a fuel bowl chamber at least partially defined by the fuel bowl, and a one-piece fuel-metering insert coupled to the body. The insert includes an idle circuit passageway having a first end in fluid communication with a fuel passageway in the body and a second end in fluid communication with the fuel bowl chamber. The insert also includes a main circuit passageway having a first end in fluid communication with the air/fuel passageway and a second end in fluid communication with the fuel bowl chamber.
Claims29
A carburetor for use with an internal combustion engine, the carburetor comprising:
- a body including an air/fuel passageway and a fuel passageway formed therein;
- a throttle valve positioned in the air/fuel passageway;
- a fuel bowl coupled to the body;
- a fuel bowl chamber at least partially defined by the fuel bowl;
- a one-piece fuel-metering insert coupled to the body, the insert including
- an idle circuit passageway having a first end in fluid communication with the fuel passageway and a second end in fluid communication with the fuel bowl chamber, the idle circuit passageway configured to carry fuel from the fuel bowl chamber to the air/fuel passageway via the fuel passageway during engine operation when the throttle valve is oriented in a substantially closed position;
- and
- a main circuit passageway having a first end in fluid communication with the air/fuel passageway and a second end in fluid communication with the fuel bowl chamber, the main circuit passageway configured to carry fuel from the fuel bowl chamber to the air/fuel passageway during engine operation when the throttle valve is opened from the substantially closed position.
Dependencies are inferred from the claim text.