Gaseous fuel-air mixer with higher mixture uniformity

Patent metadata

Field	Value
Publication number	US-11933250-B2
Application number	US-202118017761-A
Country	US
Kind code	B2
Filing date	Jul 16, 2021
Priority date	Jul 28, 2020
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

A gaseous fuel-air mixer includes an outer shell, an inner shell, and a fuel chamber rib. The outer shell includes an air intake and a fuel intake. The air intake is configured to receive air. The air intake has an air outlet. The fuel intake has a fuel inlet that is configured to receive fuel. The inner shell includes an inner shell intake that is configured to separately receive the air from the air outlet and the fuel from the fuel intake and to provide a gaseous fuel-air mixture. The inner shell cooperates with the outer shell to define a fuel intake collecting chamber that is configured to receive the fuel from the fuel inlet and a fuel intake concentrating chamber that is configured to receive the fuel from the fuel intake collecting chamber and provide the fuel to the inner shell intake.

First claim

What is claimed is:

1. A gaseous fuel-air mixer comprising:
an outer shell comprising:
an air intake that defines an air intake center axis and is configured to receive air, the air intake having an air outlet, and
a fuel intake having a fuel inlet centered on a fuel intake center axis that is configured to receive fuel;

an inner shell comprising an inner shell intake that is configured to separately receive the air from the air outlet and the fuel from the fuel intake and to provide a gaseous fuel-air mixture, the inner shell cooperating with the outer shell to define a fuel intake collecting chamber that is configured to receive the fuel from the fuel inlet and a fuel intake concentrating chamber that is configured to receive the fuel from the fuel intake collecting chamber and provide the fuel to the inner shell intake; and
a fuel chamber rib that is coupled to at least one of the outer shell or the inner shell, the fuel chamber rib disposed along the fuel intake center axis within at least one of the fuel intake collecting chamber or the fuel intake concentrating chamber,
wherein the fuel chamber rib extends in a direction parallel to the air intake center axis defining a first passage and a second passage of at least one of the fuel intake collecting chamber or the fuel intake concentrating chamber.

2. The gaseous fuel-air mixer of claim 1 , wherein:
the inner shell intake is centered on a center axis;
the fuel intake collecting chamber extends annularly about the center axis; and
the fuel chamber rib extends within the fuel intake collecting chamber so as to prevent flow of fuel between the outer shell and the inner shell within the fuel intake collecting chamber.

3. The gaseous fuel-air mixer of claim 2 , wherein:
the fuel intake concentrating chamber extends annularly about the center axis; and
the fuel chamber rib extends within the fuel intake concentrating chamber so as to prevent flow of fuel between the outer shell and the inner shell within the fuel intake concentrating chamber.

4. The gaseous fuel-air mixer of claim 1 , wherein the outer shell and the inner shell are integrally formed.

5. The gaseous fuel-air mixer of claim 4 , wherein the fuel chamber rib is integrally formed with the outer shell and the inner shell.

6. The gaseous fuel-air mixer of claim 1 , wherein the fuel chamber rib is integrally formed with the outer shell.

7. The gaseous fuel-air mixer of claim 1 , wherein the fuel chamber rib is integrally formed with the inner shell.

8. A gaseous fuel-air mixer comprising:
an outer shell comprising:
an air intake defining an air intake center axis and is configured to receive air, the air intake having an air outlet, and
a fuel intake having a fuel inlet centered on a fuel intake center axis that is configured to receive fuel;

an inner shell comprising an inner shell intake configured to separately receive the air from the air outlet and the fuel from the fuel intake and to provide a gaseous fuel-air mixture, the inner shell cooperating with the outer shell to define a fuel intake collecting chamber configured to receive the fuel from the fuel inlet and a fuel intake concentrating chamber configured to receive the fuel from the fuel intake collecting chamber and provide the fuel to the inner shell intake; and
a fuel chamber rib that is coupled to the outer shell, the fuel chamber rib disposed along the fuel intake center axis within the fuel intake collecting chamber and the fuel intake concentrating chamber, the fuel chamber rib in confronting relation with a portion of the inner shell,
wherein the fuel chamber rib extends in a direction parallel to the air intake center axis defining a first passage and a second passage of at least one of the fuel intake collecting chamber or the fuel intake concentrating chamber.

9. The gaseous fuel-air mixer of claim 8 , wherein:
the inner shell intake is centered on a center axis;
the fuel intake collecting chamber extends annularly about the center axis; and
the fuel chamber rib extends within the fuel intake collecting chamber so as to prevent flow of fuel between the outer shell and the inner shell within the fuel intake collecting chamber.

10. The gaseous fuel-air mixer of claim 9 , wherein:
the fuel intake concentrating chamber extends annularly about the center axis; and
the fuel chamber rib extends within the fuel intake concentrating chamber so as to prevent flow of fuel between the outer shell and the inner shell within the fuel intake concentrating chamber.

11. The gaseous fuel-air mixer of claim 8 , wherein the fuel chamber rib is integrally formed with the outer shell.

12. The gaseous fuel-air mixer of claim 8 , wherein:
the inner shell further comprises an inner shell intake body having a slot; and
the fuel chamber rib is positioned within the slot.

13. The gaseous fuel-air mixer of claim 8 , wherein:
the inner shell comprises an inner shell intake body; and
a portion of the air outlet is disposed within a portion of the inner shell intake body.

14. A gaseous fuel-air mixer comprising:
an outer shell comprising:
an air intake defining an air intake center axis and is configured to receive air, the air intake having an air outlet, and
a fuel intake having a fuel inlet configured to receive fuel centered on a fuel intake center axis that is;

an inner shell comprising an inner shell intake configured to separately receive the air from the air outlet and the fuel from the fuel intake and to provide a gaseous fuel-air mixture, the inner shell cooperating with the outer shell to define a fuel intake collecting chamber configured to receive the fuel from the fuel inlet and a fuel intake concentrating chamber configured to receive the fuel from the fuel intake collecting chamber and provide the fuel to the inner shell intake; and
a fuel chamber rib that is coupled to the inner shell, the fuel chamber rib disposed along the fuel intake center axis within the fuel intake concentrating chamber, the fuel chamber rib in confronting relation with a portion of the outer shell,
wherein the fuel chamber rib extends in a direction parallel to the air intake center axis defining a first passage and a second passage of at least one of the fuel intake collecting chamber or the fuel intake concentrating chamber.

15. The gaseous fuel-air mixer of claim 14 , wherein:
the inner shell intake is centered on a center axis;
the fuel intake concentrating chamber extends annularly about the center axis; and
the fuel chamber rib extends within the fuel intake concentrating chamber so as to prevent flow of fuel between the outer shell and the inner shell within the fuel intake concentrating chamber.

16. The gaseous fuel-air mixer of claim 14 , wherein the fuel chamber rib is integrally formed with the inner shell.

17. The gaseous fuel-air mixer of claim 14 , wherein:
the inner shell comprises an inner shell intake body; and
a portion of the air outlet is disposed within a portion of the inner shell intake body.

18. The gaseous fuel-air mixer of claim 14 , wherein:
the air outlet is centered on the air intake center axis; and
the fuel intake center axis intersects the air intake center axis.

Assignees

• Cummins Inc

Inventors

• Tolhurst George Martin
• Bettis Joshua Bradley
• Anderson Alan C
• Lackey Jeremy Aaron

Classifications

• B01F25/31241

  the main flow being injected in the circumferential area of the venturi, creating an aspiration in the central part of the conduit · CPC title

• B01F23/19

  Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means · CPC title

• B01F23/10

  Mixing gases with gases · CPC title

• F02M35/10157

  Supercharged engines · CPC title

• F02M35/10216

  Fuel injectors; Fuel pipes or rails; Fuel pumps or pressure regulators · CPC title