Variable spray angle injector arrangement

Patent metadata

Field	Value
Publication number	US-10415524-B2
Application number	US-201815890786-A
Country	US
Kind code	B2
Filing date	Feb 7, 2018
Priority date	Jan 9, 2014
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

An injector, comprising, an injector body comprising, an inner wall that defines an injector cavity for fluid, at least one inlet channel into the injector cavity, and at least one outlet channel from the injector cavity, a plunger that defines at least one passageway between the injector cavity and the at least one outlet channel, the plunger being movable longitudinally in the injector cavity between at least: a first open arrangement in which the at least one passageway is positioned to direct fluid into the at least one outlet channel at a first position, and a second open arrangement in which the at least one passageway is positioned to direct fluid into the at least one outlet channel at a second position different from the first position.

First claim

What is claimed is:

1. A method, comprising:
positioning a plunger in a first open arrangement in a body having an outlet channel;
directing fluid through the plunger in the first open arrangement and into a first side of the outlet channel to produce a first spray trajectory from the outlet channel;
moving the plunger to a second open arrangement; and
directing fluid through the plunger in the second open arrangement and into a second side of the same outlet channel to produce a second spray trajectory from the outlet channel different from the first spray trajectory.

2. The method of claim 1 , wherein:
with the plunger in the first open arrangement, the fluid has a first velocity distribution in the outlet channel; and
with the plunger in the second open arrangement, the fluid has a second velocity distribution in the outlet channel different from the first velocity distribution.

3. The method of claim 2 , wherein the first velocity distribution is biased toward the first side of the outlet channel and the second velocity distribution is biased toward the second side of the outlet channel.

4. The method of claim 1 , wherein the outlet channel has a channel axis, the first spray trajectory having a first spray angle relative to a reference plane that is deeper than an angle between the channel axis and the reference plane, and the second spray trajectory having a second spray angle that is shallower than the channel axis.

5. The method of claim 1 , wherein the moving step is performed based on at least one engine operating condition.

6. The method of claim 1 , further comprising:
moving the plunger to a third open arrangement; and
directing fluid through the plunger in the third open arrangement and into the outlet channel to produce a third spray trajectory from the outlet channel;
wherein moving the plunger to the third open arrangement is performed based on at least one engine operating condition.

7. The method in claim 6 , wherein with the plunger in the third open arrangement, the fluid has a third velocity distribution in the outlet channel.

8. The method in claim 7 , wherein the third velocity distribution is balanced between the first side and the second side of the outlet channel.

9. The method of claim 6 , wherein the outlet channel has a channel axis, and the third spray trajectory has a third spray angle that follows the channel axis.

10. The method of claim 1 , wherein the first side of the outlet channel defines a first longitudinal position of the outlet channel and the second side of the outlet channel defines a second longitudinal position of the outlet channel which is different from the first longitudinal position.

11. A method comprising:
positioning a plunger in a first open arrangement in a body having an outlet channel;
directing fluid through the plunger in the first open arrangement, the fluid has a first velocity distribution, wherein the first velocity distribution is biased toward the first side of the outlet channel;
moving the plunger to a second open arrangement; and
directing fluid through the plunger in the second open arrangement, the fluid has a second velocity distribution in the outlet channel different from the first velocity distribution, wherein the second velocity distribution is biased toward the second side of the outlet channel.

12. The method of claim 11 , wherein the moving step is performed based on at least one engine operating condition.

13. A method, comprising:
positioning a plunger in a first open arrangement in a body having an outlet channel, wherein the outlet channel has a channel axis;
directing fluid through the plunger in the first open arrangement and into a first side of the outlet channel to produce a first spray trajectory from the outlet channel, and the first spray trajectory having a first spray angle relative to a reference plane that is deeper than an angle between the channel axis and the reference plane;
moving the plunger to a second open arrangement; and
directing fluid through the plunger in the second open arrangement and into a second side of the outlet channel to produce a second spray trajectory from the outlet channel, and the second spray trajectory having a second spray angle that is shallower than the channel axis.

14. The method of claim 13 , wherein the moving step is performed based on at least one engine operating condition.

Assignees

• Cummins Inc

Inventors

• Stroia Bradlee J
• Peters Lester L
• Buchanan David L
• Garg Rajesh K
• Ning Wei

Classifications

• F01N3/2066

  Selective catalytic reduction [SCR] · CPC title

• F02B23/0669

  having multiple fuel spray jets per injector nozzle · CPC title

• F02M61/045 Primary

  The valves being provided with fuel discharge orifices · CPC title

• F01N2610/1453

  Sprayers or atomisers; Arrangement thereof in the exhaust apparatus · CPC title

• F02M61/184

  Discharge orifices having non circular sections · CPC title