EP3504423B1 - Ensemble soupape de commande d'injecteur de carburant - Google Patents

Ensemble soupape de commande d'injecteur de carburant Download PDF

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Publication number
EP3504423B1
EP3504423B1 EP17748493.8A EP17748493A EP3504423B1 EP 3504423 B1 EP3504423 B1 EP 3504423B1 EP 17748493 A EP17748493 A EP 17748493A EP 3504423 B1 EP3504423 B1 EP 3504423B1
Authority
EP
European Patent Office
Prior art keywords
face
solenoid
valve
assembly
bore
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.)
Active
Application number
EP17748493.8A
Other languages
German (de)
English (en)
Other versions
EP3504423A1 (fr
Inventor
Kris SULLIVAN
George A. MEEK
Jonathan N. WRAY
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.)
Borgwarner US Technologies LLC
Original Assignee
Delphi Technologies IP Ltd
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Filing date
Publication date
Application filed by Delphi Technologies IP Ltd filed Critical Delphi Technologies IP Ltd
Publication of EP3504423A1 publication Critical patent/EP3504423A1/fr
Application granted granted Critical
Publication of EP3504423B1 publication Critical patent/EP3504423B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure 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
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002—Arrangement of leakage or drain conduits in or from injectors
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • 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
    • F02M63/00—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
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • 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
    • F02M63/00—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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • F02M63/00—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
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • 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
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements

Definitions

  • the present invention relates to a fuel injector and more particularly to means improving the gain curve linearity.
  • control valve assembly of a fuel injector adapted to be arranged between a nozzle assembly and an actuator assembly.
  • the control valve assembly has a body extending along a main axis between a transverse first face and an opposed transverse second face and being provided with a recess dug in said second face and a bore opening in the bottom face of said recess and axially extending to the first face of the body.
  • the control valve assembly further comprises a check valve arranged to prevent flow between the first face of the body and the bottom face of the recess and, to enable flow in the opposite direction.
  • Said check valve comprises a valve member biased by a spring against a seating face that controls a narrow passage.
  • the invention further extend to a solenoid of a fuel injector provided with a control valve assembly as described above, the solenoid having an over-moulded core around which is wand a coil defining a central bore axially extending from a transverse lower face of the solenoid toward an end-shoulder face adapted to receive in abutment a pin against which, in use, a valve spring compresses.
  • the solenoid is further provided with a channel extending inside the over-moulding from said end-shoulder face toward a lateral face of the solenoid.
  • a second check valve is provided within said channel said check valve preventing, in use fuel flow from said central bore toward the outer lateral face of the solenoid.
  • the channel comprises an axial portion, and a radial portion joining together in a substantially right angle elbow, the axial portion extending from the end-shoulder face toward said elbow and the radial portion extending from said elbow to said outer lateral face of the solenoid.
  • Said second check valve comprises a valve member biased by a spring against a valve seat controlling a narrow passage joining said elbow.
  • the nozzle assembly 12 comprise the body 20 and an upper guide member 24 provided having a bore 26 defining an upper guiding means aligned with a lower guide means, not represented, and defined directly in said body 20.
  • the needle 28 translates under the influence of pressure variations in a control chamber 32 that is defined in the bore 26, above the needle head 30.
  • a control chamber 32 that is defined in the bore 26, above the needle head 30.
  • the control valve assembly 14 has a body 36 axially X extending from an lower face 38 that is in surface contact against the upper guide member 24 to, an opposed upper face 40 that is in surface contact against the lower face 42 of the body 22 of the actuator assembly.
  • an intermediate plate member 44 is arranged between said body 22 and member 24.
  • the body 36 is provided with a recess 46 dug in its upper face 40 and also with a hydraulic bore 48 extending between the bottom face 50 of said recess 46 and the lower face 38 of the body.
  • said hydraulic bore 48 further extends through the intermediate plate member 44 to open right above the opening of a return conduit 52 provided in the upper guide member 24.
  • the return circuit 52 extends from the guide member 24 to an outlet provided in the head of the injector.
  • the control valve assembly 14 is provided with a check valve 62 arranged between the bottom face 50 of the armature chamber 46 and the body's lower face 38.
  • Said check valve 62 or non-return valve, enables downward flow and prohibits upward flow and, it comprises a channel having an upper narrow portion 64 that joins, via a enlarging tapered seating face 65, a lower wider portion 66.
  • a compression spring 68 biasing a ball 70 against said seating face 65.
  • the check valve 62 can be of a different embodiment such as a reed valve, or the ball replaced by a plate...
  • the intermediate plate 44 is provided with several grooves dug in its upper face and also through channels creating necessary fluid communications for the operation of the injector.
  • the actuator assembly 16 has its body 22 axially X extending from a lower face 42, that is in surface contact with the upper face 40 of the control valve, to an injector head, not represented, wherein are arranged a fuel inlet, the fuel return outlet and an electric connector.
  • Said body 22 is provided with a bore 74 opening in said lower face 42 and upwardly extending right above the armature 58.
  • HP high pressure
  • an over-moulded solenoid 78 having a coil wand around a core, said over-moulded solenoid extending in the bore 74 from a lower face 80, flush in surface with the lower face 42 of the actuator's body and in abutment against the body 36 of the control valve, to a top end wherefrom electrical leads upwardly extend and electrically connect the coil to the connector.
  • Said over-moulded solenoid 78 further defines an inner bore 82 in which a coil spring 84 is compressed between a pin 86 urged against the top end of the bore 82 and, the armature 58.
  • the upper part of the stem 56 extending above the armature 58 and axially engaging in the coil spring 84 inside said bore 82.
  • a second check valve 88 is arranged inside the solenoid 78 for controlling a fluid connection provided between the inner bore 82, wherein is compressed the coil spring 84, and said second annular space S2.
  • Said second check valve 88 forbids a flow from the bore 82 to said second annular space S2 while enabling flow in the opposite direction.
  • said fluid communication arranged in the solenoid 78 comprises a upward channel having a wide portion 90 extending from the top end of the inner bore 82 and which end tapers forming a valve seat 92 at the tip of which is a narrow portion 94 that connects into a radial channel 96 extending to the lateral face of the solenoid so that it opens in said second space S2.
  • a compression spring 98 biasing a ball 100 against said seating face 92.
  • said controlled fluid communication further comprises an orifice 102 axially arranged in the pin 86.
  • the check valve 88 can also be of a different embodiment such as a reed valve, or the ball replaced by a plate.
  • the radial channel 94 can be made at an angle

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (4)

  1. Injecteur de carburant (10), comprenant un ensemble à soupape de commande (14) agencé entre un ensemble à gicleur (12) et un ensemble à actionneur (16), ledit ensemble à soupape de commande (14) ayant un corps (36) s'étendant le long d'un axe principal (X) entre une première face transversale (38) et une seconde face transversale opposée (40), et étant pourvu d'un évidement (46) creusé dans ladite seconde face (40) et d'un alésage (48) s'ouvrant dans la face de fond (50) dudit évidement et s'étendant axialement jusqu'à la première face (38) du corps, l'ensemble à soupape de commande (14) comprenant en outre un ensemble à induit et à tige (54, 56, 58) agencé à l'intérieur desdits évidement et alésage, la tige formant un siège de soupape (60) actionnable entre des positions ouverte et fermée d'un circuit de retour de carburant (52) par l'intermédiaire d'un champ magnétique généré par un solénoïde alimenté (78) agencé dans le corps (22) de l'ensemble à actionneur, l'évidement (46) formant une chambre dans laquelle l'induit (58) est, et la tige (56) formant un tiroir de soupape coulissant dans l'alésage (48), dans lequel l'ensemble à soupape de commande (14) comprend en outre une soupape de non-retour (62) agencée pour empêcher l'écoulement entre la première face (38) du corps et la face de fond (50) de l'évidement, et pour permettre l'écoulement dans la direction opposée, et dans lequel
    le solénoïde (78) a un noyau surmoulé autour duquel est enroulé une bobine définissant un alésage central (82) s'étendant axialement depuis une face inférieure transversale (80) du solénoïde vers une face d'épaulement d'extrémité adaptée pour recevoir en butée une goupille (86) contre laquelle, durant l'utilisation, un ressort de soupape (84) se comprime, dans lequel
    le solénoïde (78) est en outre pourvu d'un canal (90, 94, 96) s'étendant, à l'intérieur du surmoulage, depuis ladite face d'épaulement d'extrémité vers une face latérale du solénoïde et,
    dans lequel ladite soupape de non-retour (62) comprend un élément de soupape (70) sollicité par un ressort (68) contre une face de siège (65) qui commande un passage étroit (64), et
    dans lequel ledit élément de soupape (70) est une bille et la face de siège (65) est une face conique, et ledit passage étroit (64) s'étend depuis l'embout de ladite face conique jusqu'à la face de fond (50) de l'évidement, et
    caractérisé en ce qu'une seconde soupape de non-retour (88) est prévue à l'intérieur dudit canal (90, 94, 96), ladite soupape de non-retour (88) empêchant, durant l'utilisation, l'écoulement de carburant depuis ledit central alésage (82) vers la face latérale extérieure du solénoïde.
  2. Injecteur de carburant (10) selon la revendication 1, dans lequel le canal (90, 94, 96) comprend une partie axiale (90, 94) et une partie radiale (96) se joignant dans un coude sensiblement à angle droit, la partie axiale (90, 94) s'étendant depuis la face d'épaulement d'extrémité vers ledit coude, et la partie radiale (96) s'étendant depuis ledit coude jusqu'à ladite face latérale extérieure du solénoïde.
  3. Injecteur de carburant (10) selon la revendication 2, dans lequel ladite seconde soupape de non-retour (88) comprend un élément de soupape (100) sollicité par un ressort (98) contre un siège de soupape (92) commandant un passage étroit (94) joignant ledit coude.
  4. Injecteur de carburant (10) selon la revendication 3, dans lequel ledit élément de soupape est une bille (100) et le siège (92) est une face conique, et dans lequel ledit passage étroit (94) joignant ledit coude s'étend depuis l'embout de ladite face conique (92).
EP17748493.8A 2016-08-25 2017-08-03 Ensemble soupape de commande d'injecteur de carburant Active EP3504423B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1614523.7A GB2553140B (en) 2016-08-25 2016-08-25 Control valve assembly of a fuel injector
PCT/EP2017/069737 WO2018036786A1 (fr) 2016-08-25 2017-08-03 Ensemble soupape de commande d'injecteur de carburant

Publications (2)

Publication Number Publication Date
EP3504423A1 EP3504423A1 (fr) 2019-07-03
EP3504423B1 true EP3504423B1 (fr) 2021-10-06

Family

ID=57119751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17748493.8A Active EP3504423B1 (fr) 2016-08-25 2017-08-03 Ensemble soupape de commande d'injecteur de carburant

Country Status (3)

Country Link
EP (1) EP3504423B1 (fr)
GB (1) GB2553140B (fr)
WO (1) WO2018036786A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6032971A (ja) * 1983-08-02 1985-02-20 Nissan Motor Co Ltd 内燃機関の燃料噴射装置
JPH11200985A (ja) * 1998-01-16 1999-07-27 Nippon Soken Inc 蓄圧式燃料噴射装置
DE102006054063A1 (de) * 2006-11-16 2008-05-21 Robert Bosch Gmbh Kraftstoffinjektor
DE102007010497A1 (de) * 2007-03-05 2008-09-11 Robert Bosch Gmbh Injektor zum Einspritzen von Kraftstoff in Brennräume von Brennkraftmaschinen
DE102008002527A1 (de) * 2008-06-19 2009-12-24 Robert Bosch Gmbh Kraftstoff-Injektor
EP2333296B1 (fr) * 2009-12-10 2013-04-17 Delphi Technologies Holding S.à.r.l. Élément de soupape pour agencement de vanne de liquide
EP2711537B1 (fr) * 2012-09-25 2017-08-16 Delphi International Operations Luxembourg S.à r.l. Injecteur à carburant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2018036786A1 (fr) 2018-03-01
GB2553140B (en) 2020-04-01
GB2553140A (en) 2018-02-28
EP3504423A1 (fr) 2019-07-03
GB201614523D0 (en) 2016-10-12

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