Nozzle with contoured orifice surface and method of making same

Patent metadata

Field	Value
Publication number	US-9556844-B2
Application number	US-201514622488-A
Country	US
Kind code	B2
Filing date	Feb 13, 2015
Priority date	Feb 13, 2015
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A nozzle for a member of a fuel combustion system of an engine includes a hollow nozzle body. The nozzle body includes an outer surface, an inner surface, and an orifice surface. The outer surface defines an outer opening. The inner surface defines an interior chamber and an inner opening. The orifice surface defines an orifice passage extending between, and in communication with, the outer opening and the inner opening. The orifice passage is in communication with the interior chamber via the inner opening. The orifice surface includes a boundary surface and a protrusion. The protrusion projects from the boundary surface radially inwardly into the orifice passage.

First claim

What is claimed is:

1. A nozzle for a member of a fuel combustion system of an engine, the nozzle comprising:
a nozzle body, the nozzle body being hollow and including an outer surface, an inner surface, and an orifice surface, the outer surface defining an outer opening, the inner surface defining an interior chamber and an inner opening, and the orifice surface defining an orifice passage extending between, and in communication with, the outer opening and the inner opening, the orifice passage being in communication with the interior chamber via the inner opening; and
wherein the orifice surface includes a boundary surface and a protrusion disposed adjacent the inner opening, the protrusion projecting from the boundary surface radially inwardly into the orifice passage, and wherein the protrusion is configured to divert a flow of a fuel mixture/flame front entering the orifice passage from the inner opening radially away from the boundary surface.

2. The nozzle according to claim 1 , wherein the boundary surface is generally cylindrical and has a lower portion and an upper portion, and the protrusion projects from the upper portion of the boundary surface.

3. The nozzle according to claim 2 , wherein the protrusion extends circumferentially over a segment of the upper portion.

4. The nozzle according to claim 3 , wherein the protrusion includes a first inclined surface and a second inclined surface, the first inclined surface and the second inclined surface in converging relationship to each other and defining a ridge, the first inclined surface extending between the inner opening and the ridge and inclined away from the boundary surface moving from the inner opening to the ridge, the second inclined surface extending between the ridge and the boundary surface at an intermediate edge thereof, the second inclined surface inclined toward the boundary surface moving from the ridge to the intermediate edge.

5. The nozzle according to claim 1 , wherein the protrusion comprises a first protrusion, and the nozzle further comprises:
a second protrusion, the second protrusion projecting from the boundary surface radially inwardly into the orifice passage, the second protrusion being discontinuous from the first protrusion.

6. The nozzle according to claim 5 , wherein the boundary surface is generally cylindrical and has a lower portion and an upper portion, the first protrusion projects from the upper portion of the boundary surface, the second protrusion projects from the lower portion of the boundary surface, and the second protrusion includes a convex surface and a concave surface, the convex surface disposed adjacent the inner opening, and the concave surface disposed axially outward of the convex surface from the inner opening toward the outer opening.

7. The nozzle according to claim 1 , wherein the boundary surface is generally cylindrical and has a lower portion and an upper portion, and the protrusion projects from the lower portion of the boundary surface.

8. The nozzle according to claim 7 , wherein the protrusion comprises a convex spherical portion.

9. The nozzle according to claim 7 , wherein the protrusion comprises a torus segment.

10. The nozzle according to claim 7 , wherein the protrusion is one of a plurality of protrusions, each of the plurality of protrusions projecting from the boundary surface radially inwardly into the orifice passage.

11. The nozzle according to claim 10 , wherein at least one of the plurality of protrusions is circumferentially offset with respect to at least one other of the plurality of protrusions about the boundary surface.

12. The nozzle according to claim 10 , wherein the orifice passage extends along an orifice axis, and the plurality of protrusions is generally circumferentially aligned with respect to each other about the boundary surface and is in spaced relationship to each other along the orifice axis.

13. The nozzle according to claim 12 , wherein the plurality of protrusions extends along the orifice axis substantially between the inner opening and the outer opening.

Assignees

• Caterpillar Inc

Inventors

• Rowan Matthew I
• Burger Lucas

Classifications

• B05B1/267

  the liquid or other fluent material being deflected in determined directions · CPC title

• F02M61/1806 Primary

  characterised by the arrangement of discharge orifices, e.g. orientation or size · CPC title

• F02M47/025

  Hydraulically actuated valves draining the chamber to release the closing pressure · CPC title

• B22D23/00 Primary

  Casting processes not provided for in groups B22D1/00 - B22D21/00 (making metallic powder by casting B22F9/08; alumino-thermic welding B23K23/00; remelting metals C22B9/16) · CPC title

• F02P13/00

  Sparking plugs structurally combined with other parts of internal-combustion engines ({connection of ignition coil to spark plug connector F02P3/02;} with fuel injectors F02M57/06 {; spark plug connector per se H01T13/04 – H01T13/06; predominant aspects of sparking plug, see H01T13/40 – H01T13/44}) · CPC title