Grooved injector nozzle combustion shield

Inventors: Thomas O. Hahn (Columbus, IN); Terry L. Johnson (Otisco, IN); Aamir Ibrahim (Seymour, IN); Raheel Ahmed (Columbus, IN); Joseph A. Worthington (Scipio, IN); Chandan Mahato (Columbus, IN)

Assignee: Cummins Inc.

F02M53/04 F02M61/14 F02F1/242

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Quick Facts

Patent No.: US 12704103
App. No.: 19/046,109
Filed: Feb 5, 2025
Granted: Aug 11, 2026
Kind: B2
Examiner: NGUYEN, HUNG Q
Art Unit: 3747
USPC: 123/470

External Links

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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.

Claims (24)

1 . A method for assembly of an injector seal that is positionable around an exterior of a fuel injector, the method comprising:

positioning a seal component around a longitudinally extending portion of a thermally conductive component, the thermally conductive component having a higher thermal conductivity than the seal component; and

coupling the seal component with a head portion of the thermally conductive component that is located at an end of the longitudinally extending portion, the head portion including an end surface with at least one groove extending into the head portion.

2 . The method of claim 1 , further comprising positioning a nozzle housing of the fuel injector through the thermally conductive component after coupling the seal component with the head portion.

3 . The method of claim 2 , further comprising forming a press fit of the nozzle housing within the thermally conductive component.

4 . The method of claim 2 , further comprising forming a full press fit of the nozzle housing within the thermally conductive component so that substantially no gaps exist between the nozzle housing and the thermally conductive component.

5 . The method of claim 1 , wherein the coupling the seal component with the thermally conductive component includes press fitting the seal component into engagement with the head portion of the thermally conductive component.

6 . The method of claim 1 , further comprising inserting a seal between the seal component and the thermally conductive component.

7 . The method of claim 1 , wherein the coupling of the seal component with the head portion includes coupling the seal component with the head portion having at least two grooves in the end surface thereof.

8 . The method of claim 1 , further comprising inserting the fuel injector into the thermally conductive component until an injector body surface contacts a ring end surface of the seal component.

9 . The method of claim 8 , wherein inserting the fuel injector includes forming a gap between the end surface of the head and the injector body surface.

10 . The method of claim 1 , wherein the positioning includes positioning a stainless steel seal component around a copper thermally conductive component.

11 . The method of claim 1 , wherein the seal component is coupled to the head component before the injector seal is positioned around the exterior of the fuel injector.

12 . The method of claim 1 , wherein the coupling includes coupling the seal component with the head portion of the thermally conductive component so that the thermally conductive component is independently movable relative to the seal component.

13 . A method for assembly of an injector seal that is positionable around an exterior of a fuel injector, the method comprising:

positioning a ring-shaped seal component around a cylindrical thermally conductive component, the thermally conductive component having a higher thermal conductivity than the seal component; and

press fitting the ring-shaped seal component into engagement with a head portion located at an end of the cylindrical thermally conductive component, the head portion including an end surface with at least one groove extending into the head portion.

14 . The method of claim 13 , further comprising applying a thermal coating to the cylindrical thermally conductive component.

15 . The method of claim 13 , wherein the press fitting includes press fitting the ring-shaped seal component into engagement with an annular surface of the head portion.

16 . The method of claim 13 , wherein the press fitting includes press fitting an inner diameter of the ring-shaped seal component into engagement with an outer diameter of an annular surface of the head portion, the outer diameter being greater than the inner diameter.

17 . The method of claim 13 , wherein the press fitting includes press fitting the ring-shaped seal component into engagement with the head portion so that the ring-shaped seal component projects outwardly from the end surface of the head portion.

18 . The method of claim 17 , further comprising inserting the fuel injector through the thermally conductive component until a ring end surface of the ring-shaped seal contacts the fuel injector to form a gap formed between the end surface of the head portion and the fuel injector.

19 . The method of claim 13 , wherein the press-fitting includes press-fitting the ring-shaped seal component into engagement with the head portion having at least two grooves in the end surface thereof.

20 . The method of claim 13 , wherein the positioning includes positioning the ring-shaped seal component around the cylindrical thermally conductive component with a seal located within the seal component that extends around the cylindrical thermally conductive component.