EP3399177B1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

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Publication number
EP3399177B1
EP3399177B1 EP18173371.8A EP18173371A EP3399177B1 EP 3399177 B1 EP3399177 B1 EP 3399177B1 EP 18173371 A EP18173371 A EP 18173371A EP 3399177 B1 EP3399177 B1 EP 3399177B1
Authority
EP
European Patent Office
Prior art keywords
fuel
valve needle
valve
bore
restriction
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
EP18173371.8A
Other languages
German (de)
English (en)
Other versions
EP3399177A1 (fr
Inventor
Kevin Price
Kris SULLIVAN
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 Technologies IP Ltd
Original Assignee
Delphi Technologies IP Ltd
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Publication date
Application filed by Delphi Technologies IP Ltd filed Critical Delphi Technologies IP Ltd
Publication of EP3399177A1 publication Critical patent/EP3399177A1/fr
Application granted granted Critical
Publication of EP3399177B1 publication Critical patent/EP3399177B1/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
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • 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
    • 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
    • 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
    • F02M61/08—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 the valves opening in direction of fuel flow
    • 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
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means

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  • 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 (10)

  1. Injecteur de carburant indirect (100) à utiliser dans un moteur à combustion interne, l'injecteur de carburant comprenant :
    un corps de buse (3) ayant un perçage (2) pour recevoir du carburant depuis un conduit d'alimentation (5) pour du carburant sous pression,
    une sortie (8) depuis le perçage (2) pour distribuer du carburant vers le cylindre de combustion, en utilisation,
    un pointeau de valve (1) capable de coulisser à l'intérieur du perçage (2) entre une position fermée dans laquelle l'écoulement du carburant à travers la sortie (8) jusque dans la chambre de combustion est empêché, et une position ouverte dans laquelle l'écoulement du carburant à travers la sortie (8) jusque dans la chambre de combustion est permis, dans lequel, en utilisation, le mouvement du pointeau de valve (1) est commandé en faisant varier la pression du carburant dans une chambre de commande (13) située à une extrémité proximale du pointeau de valve, et dans lequel le pointeau de valve (100) porte un élément de restriction (20) constituant au moins une restriction (21) pour restreindre l'écoulement du carburant à travers le perçage (2) de telle sorte que, pendant le mouvement d'ouverture du pointeau de valve (1), la pression du carburant en aval de l'élément de restriction (20) est inférieure à une pression du carburant alimenté au perçage (2) depuis le conduit d'alimentation (5) ; et
    au moins un dispositif formant valve (30) qui est capable de fonctionner en réponse à une différence de pression de part et d'autre de l'élément de restriction (20) de manière à permettre un écoulement du carburant à travers ladite au moins une restriction (21) pendant le mouvement d'ouverture du pointeau de valve (1), mais à restreindre en outre l'écoulement du carburant à travers ladite au moins une restriction (21) pendant une phase finale du mouvement de fermeture du pointeau de valve (1), pour ainsi amortir ladite phase finale du mouvement de fermeture lorsque le pointeau de valve vient en assise, dans lequel
    ledit au moins un dispositif formant valve (30) comprend au moins un élément de valve (32) agencé pour couvrir l'une au moins des restrictions (21) lorsqu'il est dans une position fermée pour restreindre en outre l'écoulement du carburant à travers ladite au moins une restriction (21), et dans lequel
    ledit au moins un élément formant valve (32) est agencé pour restreindre en outre l'écoulement du carburant à travers ladite au moins une restriction (21) en empêchant complètement l'écoulement du carburant à travers ladite au moins une restriction (21) lorsqu'il est dans sa position fermée
    caractérisé en ce que
    ledit au moins un élément formant valve comprend un disque annulaire (232) sollicité vers le dispositif de restriction par un ressort (234).
  2. Injecteur de carburant indirect (100) selon la revendication 1, dans lequel ledit au moins un dispositif formant valve (30) est agencé pour restreindre en outre l'écoulement du carburant à travers ladite au moins une restriction (21) pendant la phase finale du mouvement de fermeture qui est approximativement les derniers 30 %, ou approximativement les derniers 20 %, ou approximativement les derniers 10 %, du trajet du pointeau de valve vers la position fermée en utilisation normale de l'injecteur de carburant.
  3. Injecteur de carburant indirect (100) selon la revendication 1 ou 2, dans lequel ledit au moins un élément formant valve (30) est situé en aval de ladite au moins une restriction (21) constituée par l'élément de restriction (20).
  4. Injecteur de carburant indirect (100) selon l'une quelconque des revendications 1 à 3, dans lequel ledit au moins un élément formant valve (32) comprend au moins un élément formant valve à clapet.
  5. Injecteur de carburant indirect (100) selon l'une quelconque des revendications 1 à 4, dans lequel ledit au moins un élément formant valve (32) s'étend radialement soit vers l'intérieur soit vers l'extérieur depuis une bague annulaire (31).
  6. Injecteur de carburant indirect (100) selon la revendication 5, dans lequel la bague annulaire (31) est attachée à l'élément de restriction (20) et/ou au pointeau de valve (1).
  7. Injecteur de carburant indirect (100) selon la revendication 1, dans lequel le ressort (234) est retenu par un épaulement ménagé sur le pointeau de valve.
  8. Injecteur de carburant indirect (100) selon l'une quelconque des revendications précédentes, dans lequel l'élément de restriction (20) comprend un collier annulaire attaché au pointeau de valve (1) ou formé de manière intégrale avec celui-ci.
  9. Injecteur de carburant indirect (100) selon l'une quelconque des revendications précédentes, dans lequel ladite au moins une restriction (21) adopte la forme d'au moins un orifice s'étendant à travers l'épaisseur de l'élément de restriction (20).
  10. Injecteur de carburant indirect (100) selon l'une quelconque des revendications précédentes, dans lequel ladite au moins une restriction (21) adopte la forme d'au moins une gorge ménagée dans une surface extérieure de l'élément de restriction (20) pour définir la restriction (21) conjointement avec le perçage.
EP18173371.8A 2016-03-16 2017-03-16 Injecteur de carburant Active EP3399177B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1604455.4A GB2548375A (en) 2016-03-16 2016-03-16 Fuel injector
EP17161355.7A EP3219974A1 (fr) 2016-03-16 2017-03-16 Injecteur de carburant

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP17161355.7A Division EP3219974A1 (fr) 2016-03-16 2017-03-16 Injecteur de carburant

Publications (2)

Publication Number Publication Date
EP3399177A1 EP3399177A1 (fr) 2018-11-07
EP3399177B1 true EP3399177B1 (fr) 2020-01-08

Family

ID=55952386

Family Applications (2)

Application Number Title Priority Date Filing Date
EP18173371.8A Active EP3399177B1 (fr) 2016-03-16 2017-03-16 Injecteur de carburant
EP17161355.7A Withdrawn EP3219974A1 (fr) 2016-03-16 2017-03-16 Injecteur de carburant

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP17161355.7A Withdrawn EP3219974A1 (fr) 2016-03-16 2017-03-16 Injecteur de carburant

Country Status (2)

Country Link
EP (2) EP3399177B1 (fr)
GB (1) GB2548375A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4230860A1 (fr) * 2022-02-18 2023-08-23 MAN Energy Solutions, filial af MAN Energy Solutions SE, Tyskland Soupape de carburant pour un grand moteur à combustion interne à crosse à deux temps à turbocompresseur

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6318646B1 (en) * 1999-03-26 2001-11-20 MAGNETI MARELLI S.p.A. Fuel injector
DE19960339A1 (de) * 1999-12-15 2001-06-21 Bosch Gmbh Robert Brennstoffeinspritzventil
US6499467B1 (en) * 2000-03-31 2002-12-31 Cummins Inc. Closed nozzle fuel injector with improved controllabilty
ITBO20020360A1 (it) * 2002-06-07 2003-12-09 Magneti Marelli Powertrain Spa Iniettore di carburante per un motore a combustione interna con polverizzazione multiforo
DE102007021330A1 (de) * 2007-05-07 2008-11-13 Robert Bosch Gmbh Kraftstoffinjektor für eine Brennkraftmaschine mit Common-Rail-Einspritzsystem
US7690588B2 (en) * 2007-07-31 2010-04-06 Caterpillar Inc. Fuel injector nozzle with flow restricting device
EP2568157A1 (fr) * 2011-09-08 2013-03-13 Delphi Technologies Holding S.à.r.l. Buse à injection
GB201322485D0 (en) * 2013-12-19 2014-02-05 Delphi Tech Holding Sarl Fuel injection nozzle
US9822748B2 (en) * 2014-05-31 2017-11-21 Cummins Inc. Restrictive flow passage in common rail injectors

Non-Patent Citations (1)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4230860A1 (fr) * 2022-02-18 2023-08-23 MAN Energy Solutions, filial af MAN Energy Solutions SE, Tyskland Soupape de carburant pour un grand moteur à combustion interne à crosse à deux temps à turbocompresseur

Also Published As

Publication number Publication date
EP3219974A1 (fr) 2017-09-20
EP3399177A1 (fr) 2018-11-07
GB2548375A (en) 2017-09-20
GB201604455D0 (en) 2016-04-27

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