Carburetor having integrated filter

Patent metadata

Field	Value
Publication number	US-11168646-B2
Application number	US-201816197947-A
Country	US
Kind code	B2
Filing date	Nov 21, 2018
Priority date	Nov 22, 2017
Publication date	Nov 9, 2021
Grant date	Nov 9, 2021

Abstract

A carburetor includes a body and a fuel bowl coupled to the body. A fuel bowl chamber is defined by the body and the fuel bowl. A fuel supply passageway fluidly couples a fuel supply inlet of the carburetor with the fuel bowl chamber. A fuel metering unit is coupled to the body of the carburetor. A first filter is disposed in one of the fuel supply passageway and the fuel bowl chamber, and a second filter is disposed in the fuel metering unit.

First claim

What is claimed is:

1. A carburetor comprising:
a body;
a fuel bowl coupled to the body;
a fuel bowl chamber defined by the body and the fuel bowl;
a fuel supply inlet;
a fuel supply passageway fluidly coupling the fuel supply inlet with the fuel bowl chamber;
a fuel metering unit coupled to the body;
a first filter disposed in one of the fuel supply passageway and the fuel bowl chamber;
a second filter disposed in the fuel metering unit; and
wherein at least one of the first filter and the second filter includes a molecular sieve.

2. The carburetor of claim 1 , wherein each of the first filter and the second filter includes a molecular sieve.

3. The carburetor of claim 1 , and further comprising
an air/fuel passageway defined in the body; and
wherein the fuel metering unit includes a first metering passageway to fluidly communicate the fuel bowl chamber with the air/fuel passageway.

4. The carburetor of claim 3 , wherein the fuel metering unit further includes a second metering passageway to fluidly communicate the fuel bowl chamber with the air/fuel passageway.

5. The carburetor of claim 4 , wherein the first metering passageway includes a high throttle fuel passageway, and the second metering passageway includes a low throttle fuel passageway.

6. The carburetor of claim 1 , wherein the first filter is disposed in the fuel bowl chamber.

7. The carburetor of claim 6 , further comprising a third filter disposed in the fuel supply passageway between the fuel supply inlet and the fuel bowl chamber.

8. The carburetor of claim 7 , wherein each of the first filter, the second filter, and the third filter includes a molecular sieve.

9. The carburetor of claim 6 , wherein
the body includes a stem extending into the fuel bowl chamber, and
the first filter surrounds the stem.

10. The carburetor of claim 1 , wherein the first filter is disposed in the fuel supply passageway between the fuel supply inlet and the fuel bowl chamber.

11. The carburetor of claim 1 , wherein the fuel metering unit further includes a fuel reservoir defined therein.

12. The carburetor of claim 11 , wherein the second filter is disposed in the fuel reservoir.

13. A carburetor comprising:
a body;
a fuel bowl coupled to the body;
a fuel bowl chamber defined by the body and the fuel bowl;
a fuel supply inlet;
a fuel supply passageway fluidly coupling the fuel supply inlet with the fuel bowl chamber;
a fuel metering unit coupled to the body;
a first filter disposed in the fuel bowl chamber;
a second filter disposed in the fuel metering unit; and
wherein
the body includes a stem extending into the fuel bowl chamber,
the fuel metering unit is coupled to the stem, the fuel metering unit further including a base, and
the first filter is disposed between the base of the fuel metering unit and the fuel bowl.

14. The carburetor of claim 13 , wherein the first filter is trapped in place between the base of the fuel metering unit and the fuel bowl.

Assignees

• Tti Macao Commercial Offshore Ltd

Inventors

• Nolin Eric

Classifications

• F02M19/025

  Metering orifices not variable in diameter · CPC title

• F02M19/066 Primary

  Built-in cleaning elements, e.g. filters · CPC title

• B01D29/56

  in series connection · CPC title

• B01D35/005

  Filters specially adapted for use in internal-combustion engine lubrication or fuel systems · CPC title