Muffler

Patent metadata

Field	Value
Publication number	US-11859523-B2
Application number	US-202217647192-A
Country	US
Kind code	B2
Filing date	Jan 6, 2022
Priority date	Jan 6, 2022
Publication date	Jan 2, 2024
Grant date	Jan 2, 2024

Abstract

A muffler includes a housing defining a first chamber, a second chamber and a third chamber. The muffler includes at least a pair of nested protrusions in communication with an inlet. The pair of nested protrusions is coupled to a respective surface of a pair of plates disposed in the housing such that one of the pair of nested protrusions is spaced apart from and opposite another of the pair of nested protrusions to define a tortuous path that terminates at an outlet defined along an outer circumference. The first chamber is downstream from the pair of plates. The muffler includes a first tube fluidly coupled to the first chamber to direct the exhaust gases from the first chamber to the second chamber. The muffler includes a second tube fluidly coupled to the second chamber to direct the exhaust gases from the second chamber to the third chamber.

First claim

What is claimed is:

1. A muffler, comprising:
a housing defining a first chamber, a second chamber and a third chamber, the first chamber positioned opposite the third chamber within the housing, the housing configured to be fluidly coupled to a source of exhaust gases via an inlet;
at least a pair of nested protrusions in communication with the inlet and configured to receive the exhaust gases, the pair of nested protrusions coupled to a respective surface of a pair of plates disposed in the housing such that one of the pair of nested protrusions is spaced apart from and opposite another of the pair of nested protrusions to define a tortuous path for the exhaust gases that terminates at an outlet defined along an outer circumference of one of the pair of plates, the first chamber downstream from the pair of plates and in fluid communication with the outlet, the second chamber is disposed about the pair of plates proximate the outlet and fluidly isolated from the outlet;
a first tube fluidly coupled between the first chamber and the second chamber configured to direct the exhaust gases from the first chamber to the second chamber; and
a second tube fluidly coupled between the second chamber and the third chamber configured to direct the exhaust gases from the second chamber to the third chamber.

2. The muffler of claim 1 , wherein the first chamber includes a perforated tube disposed axially within the first chamber.

3. The muffler of claim 2 , wherein the perforated tube is fluidly coupled to the first tube and configured to direct the exhaust gases from the first chamber to the first tube.

4. The muffler of claim 2 , wherein the muffler has a longitudinal axis, the pair of plates extend along the longitudinal axis, the first tube extends along an axis substantially parallel to the longitudinal axis and the perforated tube extends along a centerline substantially perpendicular to the longitudinal axis.

5. The muffler of claim 1 , further comprising a third tube disposed in the third chamber and configured to direct the exhaust gases from the third chamber to exit the muffler.

6. The muffler of claim 1 , wherein the pair of nested protrusions have a polygonal shape.

7. The muffler of claim 1 , wherein the source of exhaust gases is a header pipe associated with an engine of a power unit.

8. The muffler of claim 1 , wherein the pair of plates includes a first plate opposite and spaced apart from a second plate, the first plate including a first surface opposite a second surface, the second plate including a third surface opposite a fourth surface, and the pair of nested protrusions include a first pair of nested protrusions defined on the first surface of the first plate and a second pair of nested protrusions defined on the third surface of the second plate, the first pair of nested protrusions facing the second pair of nested protrusions to define the tortuous path.

9. The muffler of claim 8 , wherein the first pair of nested protrusions is offset from the second pair of nested protrusions to define the tortuous path.

10. The muffler of claim 1 , wherein the pair of nested protrusions comprise concentric circular protrusions.

11. The muffler of claim 1 , wherein the second tube is defined in a sub-housing, and the sub-housing is coupled to one of the pair of plates.

12. A muffler, comprising:
a housing defining a first chamber, a second chamber and a third chamber, the first chamber positioned opposite the third chamber within the housing, the housing configured to be fluidly coupled to a source of exhaust gases via an inlet;
at least a pair of nested protrusions in communication with the inlet and configured to receive the exhaust gases, the pair of nested protrusions coupled to a respective surface of a pair of plates disposed in the housing such that one of the pair of nested protrusions is spaced apart from and opposite another of the pair of nested protrusions to define a tortuous path for the exhaust gases that terminates at an outlet defined along an outer circumference of one of the pair of plates, the first chamber downstream from the pair of plates and in fluid communication with the outlet;
a first tube fluidly coupled between the first chamber and the second chamber configured to direct the exhaust gases from the first chamber to the second chamber;
a second tube fluidly coupled between the second chamber and the third chamber configured to direct the exhaust gases from the second chamber to the third chamber; and
a deswirl assembly coupled about a perimeter of the housing.

13. The muffler of claim 12 , wherein the housing further comprises a first housing wall, a second housing wall coupled to the first housing wall and a third housing wall, the deswirl assembly coupled to the second housing wall, and the second chamber is defined between the first housing wall, the second housing wall and the first chamber.

14. The muffler of claim 13 , wherein the third chamber is defined between one of the pair of plates and the third housing wall.

15. A muffler for an engine, comprising:
a housing defining a first chamber, a second chamber and a third chamber, the first chamber positioned opposite the third chamber within the housing, the second chamber radially outboard of the first chamber, the housing configured to be fluidly coupled to the engine and configured to receive exhaust gases from the engine via an inlet;
a pressure attenuator including a first plate and a second plate in communication with the inlet and configured to receive the exhaust gases, the first plate and the second plate cooperate to define a tortuous path that extends radially from the inlet, the first plate including a first pair of nested protrusions offset from a second pair of nested protrusions of the second plate, the pressure attenuator upstream from the first chamber and the first chamber fluidly coupled to the pressure attenuator via an outlet defined at an outer perimeter of the first plate;
a first tube fluidly coupled between the first chamber and the second chamber configured to direct the exhaust gases from the first chamber to the second chamber; and
a second tube fluidly coupled between the second chamber and the third chamber configured to direct the exhaust gases from the second chamber to the third chamber.

16. The muffler of claim 15 , wherein the first chamber includes a perforated tube disposed axially within the first chamber and the perforated tube is fluidly coupled to the first tube and configured to direct the exhaust gases from the first chamber to the first tube.

17. The muffler of claim 16 , wherein the muffler has a longitudinal axis, the first plate and the second plate extend along the longitudinal axis, the first tube extends along an axis substantially parallel to the longitudinal axis and the perforated tube extends along a centerline substantially perpendicular to the longitudinal axis.

18. The muffler of claim 15 , further comprising a deswirl assembly coupled about a perimeter of the housing and wherein the housing further comprises a first housing wall, a second housing wall coupled to the first housing wall and a third housing wall, the deswirl assembly coupled to the second housing wall, and the second chamber is defined between the first housing wall, the second housing wall and the first chamber.

19. The muffler of claim 15 , further comprising a third tube disposed in the third chamber and configured to direct the exhaust gases from the third chamber to exit the muffler.

Assignees

• Honeywell Int Inc

Inventors

• Anderson Morris G
• Sinha Swarna
• Brown Daniel

Classifications

• F01N1/083 Primary

  using transversal baffles defining a tortuous path for the exhaust gases or successively throttling exhaust gas flow · CPC title

• F01N1/006

  comprising at least one perforated tube extending from inlet to outlet of the silencer · CPC title

• F01N1/023 Primary

  Helmholtz resonators · CPC title

• F01N1/089

  using two or more expansion chambers in series (F01N1/083, F01N1/084, F01N1/086 take precedence) · CPC title

• F01N2470/02

  Tubes being perforated · CPC title