Groove injector nozzle combustion shield
AssigneeCummins Inc.
InventorsThomas O. Hahn, Terry L. Johnson, Aamir Ibrahim, Raheel Ahmed, Joseph A. Worthington, Chandan Mahato
Life of this patent
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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.
Claims20
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.
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.
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.
Dependencies are inferred from the claim text.