Apparatus and method for mode-switching fuel injector nozzle

• US 20050224605A1
• Filed: 04/07/2004
• Published: 10/13/2005
• Est. Priority Date: 04/07/2004
• Status: Abandoned Application

• Current Assignee: Delphi Technologies Holding S.a.r.l. (Aptiv PLC)
• Original Assignee: Delphi Technologies Holding S.a.r.l. (Aptiv PLC)
• Inventors: Dingle, Philip J.
• Application Number:
  US10/819,586
• Publication Number:
  US 20050224605A1
• Time in Patent Office: Days
• US Class Current: 239/533.200
• CPC Class Codes: F02B 1/12 with compression ignition with fuel-air charge ignited by compression ignition of an additional fuel F02B7/00
• CPC Class Codes: F02B 19/14 with compression ignition
• CPC Class Codes: F02B 23/0669 having multiple fuel spray jets per injector nozzle
• CPC Class Codes: F02B 23/0672 Omega-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder center axis the surrounding wall being exactly vertical F02B23/0696
• CPC Class Codes: F02B 23/0696 W-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder wall
• CPC Class Codes: F02M 2200/07 Fuel-injection apparatus having means for avoiding sticking of valve or armature, e.g. preventing hydraulic or magnetic sticking of parts
• CPC Class Codes: F02M 2200/46 Valves, e.g. injectors, with concentric valve bodies
• CPC Class Codes: F02M 45/086 Having more than one injection-valve controlling discharge orifices
• CPC Class Codes: F02M 47/02 of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
• CPC Class Codes: F02M 61/06 the valves being furnished at seated ends with pintle or plug shaped extensions
• CPC Class Codes: F02M 61/161 Means for adjusting injection-valve lift
• CPC Class Codes: F02M 61/1813 Discharge orifices having different orientations with respect to valve member direction of movement, e.g. orientations being such that fuel jets emerging from discharge orifices collide with each other
• CPC Class Codes: F02M 61/182 Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
• CPC Class Codes: F02M 61/1826 Discharge orifices having different sizes
• CPC Class Codes: F02M 63/00 Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A fuel injector nozzle for dispersing fuel during a normal combustion operation and a supplemental combustion operation, the fuel injector nozzle comprising: a plurality of first outlet openings configured to disperse fuel during homogeneous charge compression ignition and non-homogeneous charge compression ignition; and a plurality of second outlet openings configured to disperse fuel only during non-homogeneous charge compression ignition, wherein fuel dispersed from the plurality of second outlet openings collides with and subsumes fuel dispersed from the plurality of first outlet openings.

Claims

1. A fuel injector nozzle for dispersing fuel during homogeneous charge compression ignition and non-homogeneous charge compression ignition, the fuel injector nozzle comprising:

a plurality of first outlet openings configured to disperse fuel during homogeneous charge compression ignition and non-homogeneous charge compression ignition; and

a plurality of second outlet openings configured to disperse fuel only during non-homogeneous charge compression ignition;

wherein fuel dispersed from said plurality of second outlet openings collides with fuel dispersed from said plurality of first outlet openings.

2. The fuel injector nozzle as in claim 1, wherein said plurality of first outlet openings are smaller than said plurality of second outlet openings.

3. The fuel injector nozzle as in claim 1, wherein said plurality of first outlet openings are disposed within the fuel injector nozzle with a first angular configuration and said plurality of second outlet openings are disposed within the fuel injector nozzle with a second angular configuration and more of said plurality of second outlet openings are positioned in the fuel injector nozzle and only a portion of said plurality of said second outlet openings are configured to cause fuel from said plurality of second outlet openings to collide with fuel dispersed from said plurality of first outlet openings.

4. The fuel injector nozzle as in claim 3, wherein said plurality of first outlet openings are disposed above said plurality of second outlet openings.

5. The fuel injector nozzle as in claim 4, wherein said plurality of first outlet openings are smaller than said plurality of second outlet openings.

6. The fuel injector nozzle as in claim 2, wherein said plurality of first outlet openings are disposed within the fuel injector nozzle with a first angular configuration and said plurality of second outlet openings are disposed within the fuel injector nozzle with a second angular configuration.

7. The fuel injector nozzle as in claim 6, wherein said plurality of first outlet openings are disposed above said plurality of second outlet openings.

8. The fuel injector nozzle as in claim 1, wherein said plurality of first outlet openings only disperse fuel when a valve needle of the fuel injector nozzle is moved a first distance and said plurality of second outlet openings only disperse fuel when said valve needle moves a second distance, said second distance being further than said first distance.

9. The fuel injector nozzle as in claim 8, wherein said plurality of first outlet openings are smaller than said plurality of second outlet openings.

10. The fuel injector nozzle as in claim 8, wherein said plurality of first outlet openings are disposed within the fuel injector nozzle with a first angular configuration and said plurality of second outlet openings are disposed within the fuel injector nozzle with a second angular configuration.

11. The fuel injector nozzle as in claim 8, wherein said plurality of first outlet openings are disposed above said plurality of second outlet openings.

12. The fuel injector nozzle as in claim 10, wherein said plurality of first outlet openings are smaller than said plurality of second outlet openings.

13. The fuel injector nozzle as in claim 12, wherein said plurality of first outlet openings are disposed above said plurality of second outlet openings.

14. The fuel injector nozzle as in claim 1, wherein said plurality of first outlet openings and said plurality of second outlet openings are each configured to provide similar flow capacity.

15. The fuel injector nozzle as in claim 14, wherein said plurality of first outlet openings are disposed within the fuel injector nozzle with a first angular configuration and said plurality of second outlet openings are disposed within the fuel injector nozzle with a second angular configuration wherein flow of fuel through said plurality of first outlet openings and said plurality of second outlet openings will result in a fuel spray plume having an angular configuration with respect to the fuel injector nozzle that is one half the difference between said first angular configuration and said second angular configuration.

16. A fuel injector nozzle for dispersing fuel in a cylinder of an internal combustion engine, when the cylinder is at or about top dead center and at or about bottom dead center, the fuel injector nozzle comprising:

a plurality of first outlet openings configured to disperse fuel when the cylinder is at or about bottom dead center and when the cylinder is at or about top dead center;

a plurality of second outlet openings configured to disperse fuel only when the cylinder is at or about top dead center, wherein fuel dispersed from said plurality of second outlet openings collides with fuel dispersed from said plurality of first outlet openings.

17. The fuel injector nozzle as in claim 16, wherein said plurality of first outlet openings are smaller than said plurality of second outlet openings.

18. The fuel injector nozzle as in claim 16, wherein said plurality of first outlet openings are disposed within the fuel injector nozzle with a first angular configuration and said plurality of second outlet openings are disposed within the fuel injector nozzle with a second angular configuration.

19. The fuel injector nozzle as in claim 18, wherein said plurality of first outlet openings are disposed above said plurality of second outlet openings.

20. The fuel injector nozzle as in claim 19, wherein said plurality of first outlet openings are smaller than said plurality of second outlet openings.

21. The fuel injector nozzle as in claim 17, wherein said plurality of first outlet openings are disposed within the fuel injector nozzle with a first angular configuration and said plurality of second outlet openings are disposed within the fuel injector nozzle with a second angular configuration.

22. The fuel injector nozzle as in claim 21, wherein said plurality of first outlet openings are disposed above said plurality of second outlet openings.

23. The fuel injector nozzle as in claim 16, wherein said plurality of first outlet openings only disperse fuel when a valve needle of the fuel injector nozzle is moved a first distance and said plurality of second outlet openings only disperse fuel when said valve needle moves a second distance, said second distance being further than said first distance.

24. The fuel injector nozzle as in claim 23, wherein said plurality of first outlet openings are smaller than said plurality of second outlet openings.

25. The fuel injector nozzle as in claim 23, wherein said plurality of first outlet openings are disposed within the fuel injector nozzle with a first angular configuration and said plurality of second outlet openings are disposed within the fuel injector nozzle with a second angular configuration.

26. The fuel injector nozzle as in claim 23, wherein said plurality of first outlet openings are disposed above said plurality of second outlet openings.

27. The fuel injector nozzle as in claim 25, wherein said plurality of first outlet openings are smaller than said plurality of second outlet openings.

28. The fuel injector nozzle as in claim 27, wherein said plurality of first outlet openings are disposed above said plurality of second outlet openings.

29. A fuel injector, comprising:

a nozzle body comprising an inner bore and a valve seating;

a plurality of first outlet openings positioned in said valve seating;

a plurality of second outlet openings positioned in said valve seating, said plurality of first outlet openings being positioned above said plurality of second outlet openings;

a first outer valve needle slidably received within said inner bore, said first outer valve needle comprising a distal end for engaging a portion of said seating;

a second inner valve needle slidably received within an inner bore defined in said first outer valve needle body, said second inner valve needle comprising a distal end for engaging another portion of said seating;

a chamber disposed between said first outer valve needle and said inner bore of said nozzle body, wherein said first outer valve needle is capable of movement from a first position to a second position, said first position corresponding to said distal end of said first outer needle engaging said portion of said seating, wherein flow of a fluid from said chamber to said plurality of first outlet openings and said plurality of second outlet openings is prevented and said second position corresponding to said distal end of said first outer needle being in a facing spaced relationship with regard to said portion of seating such that movement of said first outer valve needle causes said distal end of said second inner valve needle to be in a facing spaced relationship with respect to said another portion of said seating such that flow from said chamber to said plurality of first outlet openings and said plurality of second outlet openings is possible, and said second inner valve needle being positionable at a third position, said third position being between said first position and said second position and corresponding to said distal end of said first outer needle being in a facing spaced relationship with respect to said portion of said seating while said distal end of said second inner valve needle engages said another portion of said seating such that only flow from said chamber to said plurality of first outlet openings is possible;

wherein said plurality of first outlet openings are smaller than said plurality of second outlet openings and flow of a fluid through said plurality of second outlet openings changes the vector of flow through said plurality of first outlet openings.

32. The fuel injector nozzle as in claim 29, wherein said single first outlet opening is directly aligned with said single second outlet opening.

30. A method for providing variable fuel dispersal through a fuel injector nozzle, comprising:

providing a first plurality of openings in an outer housing of said fuel injector nozzle;

providing a second plurality of openings in said outer housing of said fuel injector nozzle, said second plurality of openings being disposed below said first plurality of openings and said second plurality of openings are larger than said first plurality of openings such that a larger amount of fuel is allowed to flow therethrough;

moving an outer needle from a first position to a second position in accordance with a first mode of dispersal of fuel through the fuel injector nozzle, wherein fuel under pressure is only allowed to flow through said first plurality of openings; and

moving said outer needle from said second position to a third position in accordance with a second mode of dispersal of fuel through the fuel injector nozzle, wherein fuel under pressure is allowed to flow through said first plurality of openings and said second plurality of openings wherein fuel flowing through said second plurality of openings collides with fuel flowing through said first plurality of openings.

31. A fuel injector nozzle for dispersing fuel during homogeneous charge compression ignition and non-homogeneous charge compression ignition into a pre-mixing chamber, the fuel injector nozzle comprising:

a single first outlet opening configured to disperse fuel during homogeneous charge compression ignition and non-homogeneous charge compression ignition; and

a single second outlet opening configured to disperse fuel only during non-homogeneous charge compression ignition;

wherein fuel dispersed from said single second outlet opening collides with fuel dispersed from said single first outlet opening, wherein said single first outlet opening and said single second outlet opening are the only outlet openings in the fuel injector nozzle.

33. A fuel injector nozzle and cylinder assembly, the fuel injector nozzle configured for dispersing fuel from a side wall of the cylinder head, the fuel injector nozzle comprising:

a single first outlet opening configured to disperse fuel during homogeneous charge compression ignition and non-homogeneous charge compression ignition; and

a single second outlet opening configured to disperse fuel only during non-homogeneous charge compression ignition;

wherein fuel dispersed from said single second outlet opening collides with fuel dispersed from said single first outlet opening, wherein said single first outlet opening and said single second outlet opening are the only outlet openings in the fuel injector nozzle.