EP2918818A1 - Fuel injector - Google Patents

Fuel injector Download PDF

Info

Publication number
EP2918818A1
EP2918818A1 EP15156616.3A EP15156616A EP2918818A1 EP 2918818 A1 EP2918818 A1 EP 2918818A1 EP 15156616 A EP15156616 A EP 15156616A EP 2918818 A1 EP2918818 A1 EP 2918818A1
Authority
EP
European Patent Office
Prior art keywords
valve member
holes
outer valve
nozzle assembly
fuel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15156616.3A
Other languages
German (de)
French (fr)
Inventor
Said Boutrif
Gavin Dober
Matthieu Goy
Didier Robart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Delphi International Operations Luxembourg SARL
Original Assignee
Delphi International Operations Luxembourg SARL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Delphi International Operations Luxembourg SARL filed Critical Delphi International Operations Luxembourg SARL
Publication of EP2918818A1 publication Critical patent/EP2918818A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/26—Fuel-injection apparatus with elastically deformable elements other than coil springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/46—Valves, e.g. injectors, with concentric valve bodies

Definitions

  • the present invention relates to a variable orifice nozzle provided with a twin valve member for a fuel injector.
  • Fuel injectors with variable orifice nozzle have a body provided with an upper set of spray holes controlled by an outer valve member, also named needle, and a lower set of spray holes controlled by an inner valve member coaxially arranged inside the outer valve member.
  • the outer and inner valve members form a twin needle slidably arranged in the body, and able to be displaced between and open position and a closed position.
  • the valve members have lower ends provided with valve seats and, when the valve members are in closed position, the valve seats cooperate with seating surfaces provided on the nozzle body prohibiting fuel injection through the spray holes.
  • the outer valve member is provided with an upper valve seat cooperating with an upper seating surface which is above the upper holes, and also with a middle valve seat cooperating with a middle seating surface that is just below the upper holes.
  • the sealing of these upper holes is often not totally achieved since when the outer valve member contacts the upper seating surface, the middle seat either remains at a small distance from the middle seating surface or is not pressed onto the middle seating surface with sufficient force so that undesirable leakage through said upper holes occurs.
  • the two valve seats of the outer valve member must be pressed in contact against their respective seating surfaces with a sufficient force so pressurized fuel is unable to leak below the valve member.
  • VON variable orifice nozzle
  • the VON has a body extending along a main axis toward a lower end where are arranged an upper set of spray holes and a lower set of spray holes.
  • the VON is further provided with an outer valve member slidably arranged in the body for controlling the opening and closing of the upper holes and, an inner valve member coaxially slidably arranged inside the outer valve member for controlling the opening and closing of the lower holes.
  • the outer and the inner valve members are able to be independently translated between a closed position prohibiting fuel spray and an open position enabling fuel spray and, the nozzle assembly is further provided with an expansion means enlarging the outer valve member when being in closed position so that, the outer valve member is firmly biased against the nozzle body preventing any leakage through the upper holes.
  • the expansion means comprises a large annular cavity arranged in the outer valve member, the cavity reducing the wall thickness of the extremity of the outer valve member in the area where said valve member cooperates with the a seating surface arranged just below the upper set of holes.
  • pressurized fuel is able to fill the cavity and to generate on said area having a reduced wall thickness a force elastically enlarging the size of said valve member.
  • the reduced wall thickness may be chosen smaller than 0.5 mm and preferably smaller than 0.3 mm.
  • the expansion means comprises a large annular cavity arranged in the outer valve member and, the cavity reduces the wall thickness of the extremity of the outer valve member in the area where said valve member cooperates with the middle valve seat.
  • pressurized fuel is able to fill the cavity generating on said outer valve member area having a reduced wall thickness a force augmenting elastically the size of said valve member.
  • the expansion means further comprises, in the outer valve member, a radial through hole arranged upstream the upper valve seat and, in the inner valve member, an annular groove in fluid communication with said hole and an axial fluid passage downwardly extending from said grove to said large annular cavity.
  • the invention extends to a fuel injector comprising a variable orifice nozzle assembly as set in the preceding paragraphs.
  • the VON 12 extends along a main axis A. It has a body 14 with a pointy lower extremity 15 and is provided with an inner axial bore 16.
  • an upper set of holes 18 and a lower set of holes 20 are arranged in the pointy extremity 15 in the pointy extremity 15 in the pointy extremity 15 arranged an upper set of holes 18 and a lower set of holes 20.
  • the upper holes 18 are above the lower holes 20 and, each of the holes 18, 20, extends through the wall of the body 14 from an entry 22, 24, arranged in the bore 16 to an exit 26, 28, arranged on the outer face of the body 14.
  • the entries 22 of the upper holes 18 are arranged along an upper virtual plan circle perpendicular to the main axis A and, similarly, the entries 24 of the lower holes are arranged along a lower virtual plan circle whose diameters are perpendicular to the main axis A.
  • the bore is provided with three seating surfaces 31, 33, 35 that are from top to bottom, a first "upper” seating surface 31 arranged just above the upper entries 22 and, a second "middle” seating surface 33 arranged just below the upper entries 22 and, a third "lower” seating surface 35 arranged just above the lower entries 24, both the middle 33 and the lower 35 seating surfaces being between the upper 22 and the lower entries 24.
  • an outer cylindrical valve member 36 In the large bore 16 is slidably guided an outer cylindrical valve member 36, itself provided with an axial cylindrical smaller bore 38 wherein is slidably guided an inner valve member 40.
  • the inner valve member 40 At its lower extremity, the inner valve member 40 has a full conical end 42 while, the outer valve member 36, because of the downward opening of the smaller bore 38, has a truncated conical end 44 extending between an upper circular edge 46 and a lower circular edge 48.
  • the two valve members 36, 40 have complementary shapes enabling to form a complete cone.
  • the outer valve member 36 is further provided with a fluid passage 50 that comprises at least one radial through hole 50 arranged above the upper circular edge 46.
  • the hole 50 creates a fluid communication through the wall of the outer valve member 36, between the large bore 16 of the body 14 and the smaller bore 38 of the outer valve member 36.
  • the outer valve member 36 is further provided with an inner circular cavity 52 arranged in the smaller bore 38 in the vicinity of lower edge 48. Because of the cavity 52, the most downward portion 54 of the outer valve member 36, the portion in the vicinity to the lower edge 48 is thinner, having a reduced wall thickness inferior to 0.5mm, and preferably inferior to 0.3mm.
  • Figure 2 presents an alternative embodiment where the cavity 52 is a conical groove forming a volume parallel to the conical end 44 of the outer valve member 36.
  • Other non-represented alternatives of shapes can be made.
  • the inner valve member 40 is provided on its external face with a complementary annular groove 56 from which downwardly extend a fluid passage 58 ending before reaching the lower valve seat 34.
  • the represented fluid passage 58 comprises two parallel flats provided at the surface of the inner valve member 40 but, alternatives of other types and other number such as one, or three or more, grooves or channels, straight, helicoid or other shapes are also possible.
  • the radial hole 50 arranged in the outer valve member 36, the annular groove 56, the fluid passage 58 and the cavity 52 are in fluid communication and therefore, fuel can flow from the large bore 16 into the cavity 52.
  • the outer and inner valve members 36, 40 can be independently piloted in translation to displace between a closed position PC, where the valve member is at its most downward position, and a fully open position PO (not represented) where the valve member is lifted to its most upward position.
  • the outer valve member 36 and the inner valve member 40 being able to be displaced independently from each other, although all configurations are not in use today, nothing prevents the outer 36 and inner 40 valve members to be simultaneously in closed position PC or simultaneously in open position PO or, the inner valve member to be in open position PO while the outer valve member is in closed position PC or, to the opposite, the inner valve member to be in closed position PC while the outer valve member is in open position PO.
  • pressurized fuel flows in the body of the injector 10, from an inlet to the injection holes 18, 20.
  • closed position PC of both valve members 36, 40 the upper valve seat 30 is firmly biased against the upper seating surface 31 and, the lower valve seat 34 is firmly biased against the lower seating surface 35.
  • Pressurized fuel fills the large bore 16 of the body 14, the through hole 50, the annular groove 56 of the inner valve member 20 and downwardly flows into the fluid passage 58 until filling the circular cavity 52.
  • the pressurized fuel present in the circular cavity 52 generates forces F perpendicular to the surfaces of the cavity 52 and, said forces applied on the thinner portion 54 of the wall of the outer valve member 36 elastically deform said thinner portion 54 firmly biasing the middle valve seat 32 onto the middle seating surface 33 and therefore, the upper holes 18 are well sealed prohibiting any fuel leakage.

Abstract

A variable orifice nozzle assembly (12) of a fuel injector (10) having an upper set of spray holes (18) and a lower set of spray holes (20), and being provided with an outer valve member (36) controlling the upper holes (18) and, an inner valve member (40) coaxially slidably arranged inside the outer valve member (36) for controlling the lower holes (18). The outer (36) and the inner valve members (40) are able to be independently translated between a closed position (PC) prohibiting fuel spray and an open position (PO) enabling fuel spray and, the nozzle assembly (12) is provided with an expansion means (50,52,54, 56, 58) enlarging the outer valve member (36) when being in closed position (PC).

Description

    TECHNICAL FIELD
  • The present invention relates to a variable orifice nozzle provided with a twin valve member for a fuel injector.
    • BACKGROUND OF THE INVENTION
  • Fuel injectors with variable orifice nozzle have a body provided with an upper set of spray holes controlled by an outer valve member, also named needle, and a lower set of spray holes controlled by an inner valve member coaxially arranged inside the outer valve member. The outer and inner valve members form a twin needle slidably arranged in the body, and able to be displaced between and open position and a closed position. The valve members have lower ends provided with valve seats and, when the valve members are in closed position, the valve seats cooperate with seating surfaces provided on the nozzle body prohibiting fuel injection through the spray holes.
  • The outer valve member is provided with an upper valve seat cooperating with an upper seating surface which is above the upper holes, and also with a middle valve seat cooperating with a middle seating surface that is just below the upper holes. The sealing of these upper holes is often not totally achieved since when the outer valve member contacts the upper seating surface, the middle seat either remains at a small distance from the middle seating surface or is not pressed onto the middle seating surface with sufficient force so that undesirable leakage through said upper holes occurs. To improve the sealing of the upper spray holes, the two valve seats of the outer valve member must be pressed in contact against their respective seating surfaces with a sufficient force so pressurized fuel is unable to leak below the valve member.
    • SUMMARY OF THE INVENTION
  • Accordingly, it is an object of the present invention to solve the above mentioned problem in providing a variable orifice nozzle (VON) assembly of a fuel injector adapted to spray fuel in a combustion chamber. The VON has a body extending along a main axis toward a lower end where are arranged an upper set of spray holes and a lower set of spray holes. The VON is further provided with an outer valve member slidably arranged in the body for controlling the opening and closing of the upper holes and, an inner valve member coaxially slidably arranged inside the outer valve member for controlling the opening and closing of the lower holes.
  • The outer and the inner valve members are able to be independently translated between a closed position prohibiting fuel spray and an open position enabling fuel spray and, the nozzle assembly is further provided with an expansion means enlarging the outer valve member when being in closed position so that, the outer valve member is firmly biased against the nozzle body preventing any leakage through the upper holes.
  • The expansion means comprises a large annular cavity arranged in the outer valve member, the cavity reducing the wall thickness of the extremity of the outer valve member in the area where said valve member cooperates with the a seating surface arranged just below the upper set of holes. In use, pressurized fuel is able to fill the cavity and to generate on said area having a reduced wall thickness a force elastically enlarging the size of said valve member.
  • To enable a resilient deformation the reduced wall thickness may be chosen smaller than 0.5 mm and preferably smaller than 0.3 mm.
  • The expansion means comprises a large annular cavity arranged in the outer valve member and, the cavity reduces the wall thickness of the extremity of the outer valve member in the area where said valve member cooperates with the middle valve seat. In use, pressurized fuel is able to fill the cavity generating on said outer valve member area having a reduced wall thickness a force augmenting elastically the size of said valve member.
  • The expansion means further comprises, in the outer valve member, a radial through hole arranged upstream the upper valve seat and, in the inner valve member, an annular groove in fluid communication with said hole and an axial fluid passage downwardly extending from said grove to said large annular cavity.
  • The invention extends to a fuel injector comprising a variable orifice nozzle assembly as set in the preceding paragraphs.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The present invention is now described by way of example with reference to the accompanying drawings in which:
    • Figures 1 is a schematic axial section of the nozzle of a fuel injector as per the invention.
    • Figure 2 is a second embodiment of the invention.
    DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • In the following description, similar elements will be designated with the same reference numbers. Also, to ease and clarify the description a top-down orientation will be followed in reference to the orientation of the figures. Words and expressions such as "top, upper, lower, over, under"... may be utilized without any intention to limit the scope of the invention.
  • The lower extremity of a fuel injector 10 having a variable office nozzle 12, hereafter abbreviated VON, is represented on figure 1. The VON 12 extends along a main axis A. It has a body 14 with a pointy lower extremity 15 and is provided with an inner axial bore 16. In the pointy extremity 15 are arranged an upper set of holes 18 and a lower set of holes 20. As visible on the figure, the upper holes 18 are above the lower holes 20 and, each of the holes 18, 20, extends through the wall of the body 14 from an entry 22, 24, arranged in the bore 16 to an exit 26, 28, arranged on the outer face of the body 14. The entries 22 of the upper holes 18 are arranged along an upper virtual plan circle perpendicular to the main axis A and, similarly, the entries 24 of the lower holes are arranged along a lower virtual plan circle whose diameters are perpendicular to the main axis A.
  • In the close vicinity of the entries 22, 24, the bore is provided with three seating surfaces 31, 33, 35 that are from top to bottom, a first "upper" seating surface 31 arranged just above the upper entries 22 and, a second "middle" seating surface 33 arranged just below the upper entries 22 and, a third "lower" seating surface 35 arranged just above the lower entries 24, both the middle 33 and the lower 35 seating surfaces being between the upper 22 and the lower entries 24.
  • In the large bore 16 is slidably guided an outer cylindrical valve member 36, itself provided with an axial cylindrical smaller bore 38 wherein is slidably guided an inner valve member 40. At its lower extremity, the inner valve member 40 has a full conical end 42 while, the outer valve member 36, because of the downward opening of the smaller bore 38, has a truncated conical end 44 extending between an upper circular edge 46 and a lower circular edge 48. As visible on the figure, the two valve members 36, 40, have complementary shapes enabling to form a complete cone.
  • The outer valve member 36 is further provided with a fluid passage 50 that comprises at least one radial through hole 50 arranged above the upper circular edge 46. The hole 50 creates a fluid communication through the wall of the outer valve member 36, between the large bore 16 of the body 14 and the smaller bore 38 of the outer valve member 36.
  • The outer valve member 36 is further provided with an inner circular cavity 52 arranged in the smaller bore 38 in the vicinity of lower edge 48. Because of the cavity 52, the most downward portion 54 of the outer valve member 36, the portion in the vicinity to the lower edge 48 is thinner, having a reduced wall thickness inferior to 0.5mm, and preferably inferior to 0.3mm.
  • Figure 2 presents an alternative embodiment where the cavity 52 is a conical groove forming a volume parallel to the conical end 44 of the outer valve member 36. Other non-represented alternatives of shapes can be made.
  • The inner valve member 40 is provided on its external face with a complementary annular groove 56 from which downwardly extend a fluid passage 58 ending before reaching the lower valve seat 34. The represented fluid passage 58 comprises two parallel flats provided at the surface of the inner valve member 40 but, alternatives of other types and other number such as one, or three or more, grooves or channels, straight, helicoid or other shapes are also possible.
  • As shown on the figure, the radial hole 50 arranged in the outer valve member 36, the annular groove 56, the fluid passage 58 and the cavity 52 are in fluid communication and therefore, fuel can flow from the large bore 16 into the cavity 52.
  • The operation of the VON 12 is now described. The outer and inner valve members 36, 40, can be independently piloted in translation to displace between a closed position PC, where the valve member is at its most downward position, and a fully open position PO (not represented) where the valve member is lifted to its most upward position. The outer valve member 36 and the inner valve member 40 being able to be displaced independently from each other, although all configurations are not in use today, nothing prevents the outer 36 and inner 40 valve members to be simultaneously in closed position PC or simultaneously in open position PO or, the inner valve member to be in open position PO while the outer valve member is in closed position PC or, to the opposite, the inner valve member to be in closed position PC while the outer valve member is in open position PO.
  • In use, pressurized fuel flows in the body of the injector 10, from an inlet to the injection holes 18, 20. In closed position PC of both valve members 36, 40, the upper valve seat 30 is firmly biased against the upper seating surface 31 and, the lower valve seat 34 is firmly biased against the lower seating surface 35. Pressurized fuel fills the large bore 16 of the body 14, the through hole 50, the annular groove 56 of the inner valve member 20 and downwardly flows into the fluid passage 58 until filling the circular cavity 52. The pressurized fuel present in the circular cavity 52 generates forces F perpendicular to the surfaces of the cavity 52 and, said forces applied on the thinner portion 54 of the wall of the outer valve member 36 elastically deform said thinner portion 54 firmly biasing the middle valve seat 32 onto the middle seating surface 33 and therefore, the upper holes 18 are well sealed prohibiting any fuel leakage.
  • When the outer valve member 36 is piloted to the open position PO, its conical end 44 moves away from the upper 31 and from the middle 33 seating surfaces and, fuel is enabled to flow through the upper holes 18.
  • In the above description the following references have been utilized:
    • 10
    fuel injector
    12
    variable orifice nozzle
    14
    body
    15
    lower extremity of the body
    16
    bore
    18
    upper set of holes
    20
    lower set of holes
    22
    entry of the upper hole
    24
    entry of the lower hole
    26
    exit of the upper hole
    28
    exit of the lower hole
    30
    upper valve seat
    31
    upper seating surface
    32
    middle valve seat
    33
    middle seating surface
    34
    lower valve seat
    35
    lower seating surface
    36
    outer valve member
    38
    smaller bore in the outer valve member
    40
    inner valve member
    42
    conical end of the inner valve member
    44
    frustoconical end of the outer valve member
    46
    upper edge of the frustoconical end
    48
    lower edge of the frustoconical end
    50
    fluid passage
    52
    inner circular cavity
    54
    thinner portion of the outer valve member
    56
    annular groove in the inner valve member
    58
    flat
    A
    main axis
    PO
    position fully open
    PC
    position closed
    F
    force

Claims (6)

  1. Variable orifice nozzle assembly (VON) (12) of a fuel injector (10) adapted to spray fuel in a combustion chamber, the VON (12) having a body (14) extending along a main axis (A) toward a lower end (15) where are arranged an upper set of spray holes (18) and a lower set of spray holes (20), the VON (12) being further provided with an outer valve member (36) slidably arranged in the body (14) for controlling the opening and closing of the upper holes (18) and, an inner valve member (40) coaxially slidably arranged inside the outer valve member (36) for controlling the opening and closing of the lower holes (18), characterized in that
    the outer (36) and the inner valve members (40) are able to be independently translated between a closed position (PC) prohibiting fuel spray and an open position (PO) enabling fuel spray and in that the nozzle assembly (12) is further provided with an expansion means (50,52,54, 56, 58) enlarging the outer valve member (36) when being in closed position (PC) so that, the outer valve member (36) is firmly biased against the nozzle body (14) preventing any leakage through the upper holes (18).
  2. Nozzle assembly (12) as set in the preceding claim wherein the expansion means (50-58) comprises an annular cavity (52) arranged in the outer valve member (36), the cavity (52) reducing the wall thickness of the extremity of the outer valve member in the area (54) where said valve member (36) cooperates with the a seating surface (33) arranged just below the upper holes (18) so that, in use, pressurized fuel is able to fill the cavity (52) generating on said outer valve member area (54) having a reduced wall thickness a force elastically enlarging said valve member (36).
  3. Nozzle assembly (12) as set in claim 2 wherein said reduced wall thickness is smaller than 0.5 mm.
  4. Nozzle assembly (12) as set in claim 2 or 3 wherein said reduced wall thickness is preferably smaller than 0.3 mm.
  5. Nozzle assembly (12) as set in any of the claims 2 to 4 wherein the expansion means (50-58) further comprises, in the outer valve member (36), a radial through hole (50) arranged upstream the upper valve seat (30) and, in the inner valve member (40), an annular groove (56) in fluid communication with said hole (50), and an axial fluid passage (58) downwardly extending from said groove (56) to said large annular cavity (52).
  6. Fuel injector (10) provided with a variable orifice nozzle assembly (12) as set in any the preceding claim.
EP15156616.3A 2014-03-10 2015-02-25 Fuel injector Withdrawn EP2918818A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB1404131.3A GB201404131D0 (en) 2014-03-10 2014-03-10 Fuel injector

Publications (1)

Publication Number Publication Date
EP2918818A1 true EP2918818A1 (en) 2015-09-16

Family

ID=50554757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15156616.3A Withdrawn EP2918818A1 (en) 2014-03-10 2015-02-25 Fuel injector

Country Status (2)

Country Link
EP (1) EP2918818A1 (en)
GB (1) GB201404131D0 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2554368B (en) * 2016-09-22 2020-06-03 Delphi Tech Ip Ltd Dual fuel injector nozzle with an anti-leakage feature

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003040543A1 (en) * 2001-11-09 2003-05-15 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
DE102004055267A1 (en) * 2004-11-17 2006-05-18 Robert Bosch Gmbh Fuel injecting device e.g. CR injector, for internal combustion engine, has gap formed between cylindrical section and piston, and control space confined between end surface of outer valve pin and side limitation
DE102004060151A1 (en) * 2004-12-14 2006-06-29 Siemens Ag Nozzle assembly for injector housing, has needle with closing surface that is mechanically coupled to sealing edges in closing direction of needle so that fluid e.g. fuel, flow via injection hole is prevented and allowed in other positions
EP1693562A1 (en) * 2005-01-19 2006-08-23 Delphi Technologies, Inc. Fuel injector
DE102007000080A1 (en) * 2006-02-08 2007-08-30 Denso Corp., Kariya Fuel injection valve, for an internal combustion motor, has a constant fuel feed to the outlet end where only the second needle is raised/lowered to open and close the two jet openings
JP2009275646A (en) * 2008-05-16 2009-11-26 Denso Corp Fuel injection nozzle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003040543A1 (en) * 2001-11-09 2003-05-15 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
DE102004055267A1 (en) * 2004-11-17 2006-05-18 Robert Bosch Gmbh Fuel injecting device e.g. CR injector, for internal combustion engine, has gap formed between cylindrical section and piston, and control space confined between end surface of outer valve pin and side limitation
DE102004060151A1 (en) * 2004-12-14 2006-06-29 Siemens Ag Nozzle assembly for injector housing, has needle with closing surface that is mechanically coupled to sealing edges in closing direction of needle so that fluid e.g. fuel, flow via injection hole is prevented and allowed in other positions
EP1693562A1 (en) * 2005-01-19 2006-08-23 Delphi Technologies, Inc. Fuel injector
DE102007000080A1 (en) * 2006-02-08 2007-08-30 Denso Corp., Kariya Fuel injection valve, for an internal combustion motor, has a constant fuel feed to the outlet end where only the second needle is raised/lowered to open and close the two jet openings
JP2009275646A (en) * 2008-05-16 2009-11-26 Denso Corp Fuel injection nozzle

Also Published As

Publication number Publication date
GB201404131D0 (en) 2014-04-23

Similar Documents

Publication Publication Date Title
US7971802B2 (en) Fuel injector
CN101680413B (en) Control valve for a fuel injection valve
US6517011B1 (en) Fuel injector with pressurized fuel reverse flow check valve
US10208711B2 (en) Gas injector including an outwardly opening valve closure element
US20060118660A1 (en) Fuel injection valve for internal combustion engines
US20190010908A1 (en) Fuel injector
RU2010107374A (en) FUEL INJECTOR WITH IMPROVED SEALING OF A SEALED SEAT, BALANCED BY PRESSURE OF THE CONTROL VALVE
CN106415088B (en) Extraction valve
CN108138717B (en) Fuel injector
CN101624952A (en) Fuel injection device
EP2918818A1 (en) Fuel injector
CN103644060B (en) A kind of control valve
CN105673282A (en) Pressure-balanced valve type common-rail fuel injector
CN106014729B (en) Structure for improving common-rail injector response performance
CN109281788B (en) Injector for injecting liquid and gaseous fuels
JP2006514214A (en) Fuel injection valve for internal combustion engine
EP2405127B1 (en) A fuel injector for internal combustion engines
EP3274583B1 (en) Control valve arrangement
JP2006214394A (en) Fuel injection valve
CN210217972U (en) VE distribution pump damping delivery valve
CN208203457U (en) Injector and its valve seat
KR102082589B1 (en) Piezoelectric Injectors for Fuel Injection
JP2018532945A (en) Fuel injector
EP3036428B1 (en) Control valve arrangement
WO2018146004A1 (en) Control valve arrangement for a dual fuel injector

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17P Request for examination filed

Effective date: 20160316

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

17Q First examination report despatched

Effective date: 20170412

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20170717