Groove injector nozzle combustion shield

Patent metadata

Field	Value
Publication number	US-12228100-B2
Application number	US-202318313620-A
Country	US
Kind code	B2
Filing date	May 8, 2023
Priority date	Dec 2, 2019
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

An injector seal assembly including a nozzle combustion shield is disclosed, the thermally conductive component of the injector seal assembly defining at least one groove to allow fluid communication between the main combustion chamber and a gap defined by a fuel injector and the injector seal assembly to facilitate the prevention of corrosion of the components.

First claim

What is claimed is:

1. An injector seal comprising:
a seal component formed of a first material; and
a thermally conductive component coupled to the seal component and comprising a first portion positioned adjacent to the seal component and defining an end surface, the end surface including at least one groove, the thermally conductive component formed of a second material, the second material having a higher thermal conductivity than the first material, wherein the thermally conductive component is independently movable relative to the seal component.

2. The injector seal of claim 1 , wherein the first material is comprised of stainless steel and/or the second material is comprised of copper.

3. The injector seal of claim 1 , wherein the at least one groove defines a passageway for gases created by combustion to escape through an air gap between the thermally conductive component and the seal component and communicate with a combustion chamber.

4. The injector seal of claim 1 , wherein the first portion of the thermally conductive component defines a head portion, the thermally conductive component further comprising a nozzle portion and a longitudinally extending portion separating the head portion from the nozzle portion.

5. The injector seal of claim 4 , wherein the nozzle portion of the thermally conductive component comprises a wrap-around feature.

6. The injector seal of claim 1 , wherein the end surface includes at least two grooves.

7. The injector seal of claim 1 , wherein the injector seal is configured to be positioned annularly around a fuel injector and form a full-press fit with the fuel injector.

8. An internal combustion engine including a fuel injector assembly for mounting in an engine cylinder head, the internal combustion engine comprising:
a cylinder head defining a bore, the bore defining a sidewall surface;
a fuel injector body including a longitudinal axis, a nozzle housing defining a tip portion, and a retainer; and
an injector seal assembly positioned between the fuel injector body and the sidewall surface, the injector seal assembly comprising:
a seal component formed of a first material, the seal component positioned in a space formed longitudinally between the fuel injector body and the sidewall surface, and
a thermally conductive component positioned radially between the nozzle housing and the seal component and coupled to the seal component, the thermally conductive component being formed of a second material, the second material having a higher thermal conductivity than the first material and configured to transfer heat from the nozzle housing to the seal component, the thermally conductive component comprising:
a first portion positioned adjacent to the seal component and defining an end surface, the end surface including at least one groove, and
a second portion positioned adjacent to the tip portion of the nozzle housing, wherein the first portion of the thermally conductive component comprises a head portion, the head portion and the fuel injector body defining a gap to allow the thermally conductive component to move longitudinally along a longitudinal axis of the fuel injector body.

9. The internal combustion engine of claim 8 , wherein the injector seal assembly couples to the fuel injector via an interference fit.

10. The internal combustion engine of claim 9 , wherein the injector seal assembly forms a full-press fit with the fuel injector.

11. The internal combustion engine of claim 8 , wherein the thermally conductive component is configured to facilitate a substantial transfer of heat away from the nozzle housing.

12. The internal combustion engine of claim 8 , wherein the thermally conductive component includes a thermal coating disposed on at least a portion of the thermally conductive component.

13. The internal combustion engine of claim 12 , wherein the thermal coating comprises a plasma spray zirconia coating or a sol gel material.

14. The internal combustion engine of claim 12 , wherein the thermal coating has a thickness of approximately 0.5 millimeters.

15. The internal combustion engine of claim 8 , wherein the at least one groove defines a passageway for gases created by combustion to escape through an air gap between the thermally conductive component and the seal component and communicate with a combustion chamber.

16. The internal combustion engine of claim 8 , wherein the end surface includes at least two grooves.

17. An internal combustion engine including a fuel injector assembly for mounting in an engine cylinder head, the internal combustion engine comprising:
a cylinder head defining a bore, the bore defining a sidewall surface;
a fuel injector body including a longitudinal axis, a nozzle housing defining a tip portion, and a retainer; and
an injector seal assembly positioned between the fuel injector body and the sidewall surface, the injector seal assembly comprising:
a seal component formed of a first material, the seal component positioned in a space formed longitudinally between the fuel injector body and the sidewall surface, and
a thermally conductive component positioned radially between the nozzle housing and the seal component and coupled to the seal component, the thermally conductive component being formed of a second material, the second material having a higher thermal conductivity than the first material and configured to transfer heat from the nozzle housing to the seal component, wherein the thermally conductive component is independently movable relative to the seal component, the thermally conductive component comprising:
a first portion positioned adjacent to the seal component and defining an end surface, the end surface including at least one groove, and
a second portion positioned adjacent to the tip portion of the nozzle housing and wrapped around the tip portion of the nozzle housing.

18. The internal combustion engine of claim 17 , wherein the thermally conductive component substantially overlaps the tip portion of the nozzle housing.

19. The internal combustion engine of claim 17 , wherein the end surface includes at least two grooves.

20. The internal combustion engine of claim 17 , wherein the at least one groove defines a passageway for gases created by combustion to escape through an air gap between the thermally conductive component and the seal component and communicate with a combustion chamber, wherein the at least one groove defines a passageway for gases created by combustion to escape through an air gap between the thermally conductive component and the seal component and communicate with a combustion chamber.

Assignees

• Cummins Inc

Inventors

• Hahn Thomas O
• Johnson Terry L
• Ibrahim Aamir
• Ahmed Raheel
• Worthington Joseph A
• Mahato Chandan

Classifications

• F02M61/14

  Arrangements of injectors with respect to engines; Mounting of injectors · CPC title

• F02F1/242

  Arrangement of spark plugs or injectors · CPC title

• F02M61/166

  Selection of particular materials · CPC title

• F02M53/046

  with thermally-insulating means · CPC title

• F02M53/04 Primary

  Injectors with heating, cooling, or thermally-insulating means · CPC title