Methods and systems for a fuel injector

Patent metadata

Field	Value
Publication number	US-10808668-B2
Application number	US-201816149877-A
Country	US
Kind code	B2
Filing date	Oct 2, 2018
Priority date	Oct 2, 2018
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

Methods and systems are provided for an injector. In one example, the injector comprises at least two passages, wherein outlets of each of the passages are differently shaped than corresponding inlets of the passages. Further, in one or more examples, each of the outlets may be shaped and sized differently with respect to each other.

First claim

The invention claimed is:

1. An injector, comprising:
a first injector nozzle passage twisting from a first inlet to a first outlet, the first inlet shaped differently than the first outlet,
where the first outlet has a first outlet shape that includes a plurality of arms, and
where the twisting of the first injector nozzle passage is formed by a first profile of the plurality of arms of the first outlet shape extending from the first outlet towards the first inlet at a first angle; and

a second injector nozzle passage twisting from a second inlet to a second outlet, the second inlet shaped differently than the second outlet,
where the second outlet has a second outlet shape that includes a plurality of arms, and
where the twisting of the second injector nozzle passage is formed by a second profile of the plurality of arms of the second outlet shape extending from the second outlet towards the second inlet at a second angle.

2. The injector of claim 1 , wherein the first and second injector nozzle passages of the injector are fluidly coupled to a combustion chamber.

3. The injector of claim 1 , wherein a first inlet shape at the first inlet and a second inlet shape at the second inlet are identical, and where each of the first inlet shape and the second inlet shape is a circle.

4. The injector of claim 1 , wherein each of the first outlet shape and the second outlet shape is a plus-shape.

5. The injector of claim 1 , wherein the first profile of the plurality of arms of the first outlet shape twists, along a length of the first injector nozzle passage, as the first profile transitions from the first outlet shape to a first inlet shape.

6. The injector of claim 1 , wherein the second profile of the plurality of arms of the second outlet shape twists, along a length of the second injector nozzle passage, as the second profile transitions from the second outlet shape to a second inlet shape.

7. A system, comprising:
an engine comprising at least one cylinder; and
a fuel injector positioned to inject into the at least one cylinder, and where the fuel injector comprises a plurality of injector nozzle passages including a first injector nozzle passage, a second injector nozzle passage, and a third injector nozzle passage, the first injector nozzle passage comprising a first inlet differently shaped and sized than a first outlet, the second injector nozzle passage comprising a second inlet differently shaped and sized than a second outlet, and the third injector nozzle passage comprising a third inlet differently shaped and sized than a third outlet, and where each of the first, second, and third outlets are shaped and sized differently with respect to each other, and where each of the first, second, and third outlets are oriented differently relative to a central axis of the fuel injector,
wherein the first inlet and the first outlet are aligned along an axis parallel to the central axis of the fuel injector, and where the first inlet is circle shaped and the first outlet is sombrero shaped.

8. The system of claim 7 , wherein the second inlet and the second outlet are misaligned relative to respective injection axes, and where an injection axis of the second inlet is parallel to the central axis of the fuel injector, and where an injection axis of the second outlet is angled relative to the central axis of the fuel injector by an angle between 5 and 30 degrees, and where the second inlet is circle shaped, and the second outlet is ellipse shaped.

9. The system of claim 7 , wherein the third inlet and the third outlet are misaligned relative to respective injection axes, and where an injection axis orthogonal to a cross-section of the third inlet is parallel to the central axis of the fuel injection, and where an injection axis orthogonal to a cross-section of the third outlet is angled relative to the central axis of the fuel injector by an angle between 1 and 10 degrees, and where the third inlet and the third outlet are circle shaped, the third inlet comprising a diameter greater than a diameter of the third outlet, and where a cross-section of a midpoint of the third injector nozzle passage comprises a diameter equal to half of a sum of the diameters of the third inlet and the third outlet.

10. The system of claim 7 , wherein at least one of the first injector nozzle passage, the second injector nozzle passage, and the third injector nozzle passage twists from a circle-shape to a plus-shape, and where the twist is based on an angle generated between axes of arms of the plus-shape and axes of origination at the circle-shape.

11. The system of claim 7 , wherein at least one of the first injector nozzle passage, the second injector nozzle passage, and the third injector nozzle passage transitions from a circle-shape to a smiley-face shape comprising two identical cylindrical outlets and a single banana shaped outlet.

12. The system of claim 7 , wherein the first injector nozzle passage, the second injector nozzle passage, and the third injector nozzle passage are arranged in different quadrants at an extreme end of an injector cylindrical pin of the fuel injector, and where at least one quadrant of the fuel injector is sealed from a combustion chamber.

13. A method, comprising:
selecting between a plurality of differently shaped fuel injector nozzle passages of a fuel injector based on a fuel injection demand and a position of a piston, the piston included in a cylinder that the fuel injector is positioned to inject fuel into, each outlet of the plurality of differently shaped fuel injector nozzle passages having a different shape and size with respect to each other;
adjusting a position of an injector pin of the fuel injector to inject fuel from a selected fuel injector nozzle passage,
wherein adjusting the position of the injector pin of the fuel injector further comprises adjusting the position of the injector pin to a first position in response to the fuel injection demand being absent;

adjusting the position of the injector pin to a second position in response to the fuel injection demand being present and the piston being above BDC during an intake stroke;
adjusting the position of the injector pin to a third position in response to the fuel injection demand still being present and the piston being at BDC between the intake stroke and a compression stroke; and
adjusting the position of the injector pin to a fourth position in response to the fuel injection demand still being present and a spark currently being provided,
wherein the second position corresponds to fuel being injected through a first injector nozzle passage comprising a first outlet of the differently shaped and sized outlets that comprises a first shape, the third position corresponds to fuel being injected through a second injector nozzle passage comprising a second outlet of the differently shaped and sized outlets that comprises a second shape different than the first shape, and the fourth position corresponds to fuel being injected through a third injector nozzle passage comprising a third outlet of the differently shaped and sized outlets that comprises a third shape different than each of the first and second shapes.

14. The method of claim 13 , wherein each of the first, second, and third shapes is selected from one or more of a plus, a smiley-face, a sombrero, an upside-down T, and a football.

15. The method of claim 13 , wherein adjusting the position of the injector pin further includes rotating an upper tube to fluidly couple the upper tube to a plurality of lower tubes corresponding to the first, second, and third injector nozzle passa

Assignees

• Ford Global Tech Llc

Inventors

• Zhang Xiaogang
• Yi Jianwen James
• Meinhart Mark
• Basmaji Joseph F
• Wooldridge Steven

Classifications

• F02M61/1806 Primary

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

• F02M61/1833

  Discharge orifices having changing cross sections, e.g. being divergent · CPC title

• F02M2700/07

  Nozzles and injectors with controllable fuel supply · CPC title

• F02M61/1826

  Discharge orifices having different sizes · CPC title

• F02M61/184 Primary

  Discharge orifices having non circular sections · CPC title