EP1555429B1 - Buse d'injection de carburant - Google Patents

Buse d'injection de carburant Download PDF

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Publication number
EP1555429B1
EP1555429B1 EP05000209A EP05000209A EP1555429B1 EP 1555429 B1 EP1555429 B1 EP 1555429B1 EP 05000209 A EP05000209 A EP 05000209A EP 05000209 A EP05000209 A EP 05000209A EP 1555429 B1 EP1555429 B1 EP 1555429B1
Authority
EP
European Patent Office
Prior art keywords
pressure
nozzle needle
control piston
fuel injection
injection nozzle
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.)
Expired - Lifetime
Application number
EP05000209A
Other languages
German (de)
English (en)
Other versions
EP1555429A1 (fr
Inventor
Stephan Haas
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.)
Everllence SE
Original Assignee
MAN Diesel SE
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 MAN Diesel SE filed Critical MAN Diesel SE
Publication of EP1555429A1 publication Critical patent/EP1555429A1/fr
Application granted granted Critical
Publication of EP1555429B1 publication Critical patent/EP1555429B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • F02M61/161—Means for adjusting injection-valve lift
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • 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
    • F02M61/06—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 being furnished at seated ends with pintle or plug shaped extensions
    • 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

Definitions

  • the invention relates to a fuel injector with a housing in which a held under the action of a spring by abutment against a seat in the closed position, auf whybare by the pressure of the injected fuel nozzle needle is arranged.
  • the EP 1 041 272 A or the DE 41 23 721 , C already shows a fuel injector in which a control piston for limiting the Einspritznadelhubs is present.
  • the control piston is movable under the influence of a control valve, which controls the pressure in the control room, between two stop points fixed to the housing. Depending on this, the maximum stroke of the nozzle needle varies, so that selectively one or two rows of spray holes can be released.
  • the invention has for its object to provide a simple and compact fuel injector constructed in two different, precisely definable operating positions for full and part load and their application is not limited to a special injection system.
  • this is achieved by providing a control piston which can be acted upon or depressurized by one of two different axial positions by means of a pressurized fluid and which delimits the opening path of the nozzle needle for releasing one or more spray-hole rows.
  • the nozzle needle facing away from the end face of the control piston is pressurized in a the opening stroke of the nozzle needle to release a spray hole row limiting partial load position and relieved of pressure in another, all superimposed injection hole rows releasing full load position.
  • control piston is in the partial load position with its end facing the nozzle needle on a housing-fixed stop.
  • the control piston is in the full load position with an end facing away from the nozzle needle on a further housing-fixed stop. This results in precisely defined operating positions for the two load ranges.
  • the injector according to FIG. 1 has a housing composed of three parts 1, 2, 3.
  • a nozzle needle 4 is axially displaceably guided, which has a section 5 with an enlarged diameter.
  • the section 5 protrudes into a pressure chamber 6 into which the fuel to be injected is supplied via a line 7.
  • the lower end of the valve needle 4 is under the action of a spring 8 to a seat 9 at.
  • a control pin 10 which passes through a naval 11.
  • In the naval 11 opens a first row of spray holes 12.
  • the lower end of the control pin 10 projects sealingly into a furthertreraum 13 into which opens at least one further series of spray holes 14.
  • the upper end face 15 of the two-part nozzle needle 4 is located in the in FIG. 1 illustrated rest position at a distance h1 from the lower end face 16 of a guided in the housing part 2 in the axial direction of the control piston 17.
  • the control piston 17 is located with the edge of its lower end face 16 to an annular stop 18 fixed to the housing.
  • the control piston 17 passes through an annular chamber 19, which communicates via a line 20 with the fuel-carrying line 7 in connection. From the chamber 19, a line 21 in the control piston 17 leads to a pressure chamber 22 above the upper end face 23 of the control piston 17.
  • the pressure chamber 22 is bounded laterally by the housing part 2 and above by a plate-shaped stop 24.
  • the stop 24 has a bore 25 which can be closed by a closure member.
  • the closure member has a closure ball 26 which is durable by means of an actuating rod 27 in the closed position.
  • the control rod 27 is adjustable in dependence on the load condition of the engine such that in the rest position and in the partial load position, the closure ball 26 is held in the closed position and releases the closure ball in the full load position, so that the fuel can flow through a line 28.
  • it is also differently constructed, depending on the engine power alsutz and zumelde closure organs used.
  • FIG. 2 The arrangement according to FIG. 2 is in principle just as structured as the one after FIG. 1 , Only here is the chamber 19 connected to a line 30 which is supplied by means of a pump 31 lubricating oil under pressure. This lubricating oil then passes via the line 21 into the pressure chamber 22.
  • the other function is consistent with the arrangement according to FIG. 1 match. It is also possible to pressurize the pressure chamber 22 with a pressure fluid from a separate fluid circuit.

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 (6)

  1. Injecteur de carburant comportant un boîtier (1, 2, 3) recevant :
    - une aiguille d'injecteur (4) soumise à l'action d'un ressort (8) qui la maintient appliquée contre un siège (9) en position de fermeture, et commandée dans le sens de l'ouverture par la pression du carburant à injecter,
    - un piston de commande (17) sollicité par un liquide sous pression ou déchargé en pression pour passer dans l'une des deux positions axiales différentes, ce piston délimitant la course d'ouverture de l'aiguille d'injecteur (4) pour libérer une ou plusieurs séries d'orifices d'éjection (12, 14),
    - la surface frontale (23) du piston de commande (17) non tournée vers l'aiguille d'injecteur (4) est sollicitée en pression dans une position de charge partielle délimitant la course d'ouverture de l'aiguille d'injecteur pour libérer l'une des séries d'orifices d'éjection (12), et elle est déchargée en pression pour la position de charge totale, libérant toutes les séries superposées d'orifices d'éjection (12, 14), et
    - pour définir précisément les positions de fonctionnement correspondant aux deux plages de charge,
    * en position de charge partielle, le piston de commande (17) s'appuie par sa face frontale (16) tournée vers l'aiguille d'injecteur (4) contre une butée (18) solidaire du boîtier de façon que grâce aux dimensionnements appropriés des surfaces qui assurent le déplacement de l'aiguille d'injecteur (4) dans sa course d'ouverture et de la surface frontale (23) du piston de commande (17), le piston reste en appui contre la butée (18), sous l'effet de la pression régnant dans une chambre de pression (22) au-dessus du piston de commande (17) et chargé en liquide sous pression,
    * en position de charge totale le piston de commande (17) s'appuie par sa face frontale (23) non tournée vers l'aiguille d'injecteur (4) contre une butée (24) solidaire du boîtier, et la chambre de pression (22) est déchargée en pression pour la position de charge totale par un organe de fermeture (26, 27) commandé en fonction de l'état de charge du moteur,
    caractérisé en ce qu'
    en aval du siège (9) de l'aiguille d'injecteur (4), une préchambre (11) aboutit à la première série d'orifices d'éjection (12), et l'aiguille d'injecteur (4) comporte un téton de commande (10) qui traverse la préchambre et, en position de repos et de charge partielle, il pénètre de façon étanche dans une autre préchambre (13) pour les autres orifices d'éjection et libère l'arrivée vers l'autre préchambre (13) en position de charge totale.
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le piston de commande (17) comporte une conduite (21) allant d'une chambre annulaire latérale (19) de liquide sous pression vers la chambre de pression (22).
  3. Injecteur de carburant selon la revendication 1 ou 2,
    caractérisé en ce que
    l'organe d'obturation (26, 27) comporte une tige d'actionnement (26) commandée en fonction de la puissance du moteur et qui maintient une bille d'obturation (26) en position de fermeture pour la plage de charge partielle.
  4. Injecteur de carburant selon les revendications précédentes,
    caractérisé en ce que
    le liquide sous pression est du carburant.
  5. Injecteur de carburant selon les revendications 1 à 3,
    caractérisé en ce que
    le liquide sous pression est de l'huile de lubrification.
  6. Injecteur de carburant selon la revendication 5,
    caractérisé en ce que
    l'alimentation en huile de lubrification (30) comporte une pompe (31) de relevage de pression.
EP05000209A 2004-01-16 2005-01-07 Buse d'injection de carburant Expired - Lifetime EP1555429B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004002286A DE102004002286A1 (de) 2004-01-16 2004-01-16 Kraftstoffeinspritzdüse
DE102004002286 2004-01-16

Publications (2)

Publication Number Publication Date
EP1555429A1 EP1555429A1 (fr) 2005-07-20
EP1555429B1 true EP1555429B1 (fr) 2009-08-12

Family

ID=34609581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05000209A Expired - Lifetime EP1555429B1 (fr) 2004-01-16 2005-01-07 Buse d'injection de carburant

Country Status (6)

Country Link
US (1) US20050230501A1 (fr)
EP (1) EP1555429B1 (fr)
JP (1) JP2005201274A (fr)
KR (1) KR20050075719A (fr)
CN (1) CN1641207B (fr)
DE (2) DE102004002286A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008014251A1 (de) * 2008-03-13 2009-09-17 Man Diesel Se Einspritzventil für Direkteinspritzung
DE102009001131A1 (de) * 2008-12-09 2010-06-10 Robert Bosch Gmbh Kraftstoffinjektor
DE102008061400A1 (de) * 2008-12-10 2010-06-17 Man Diesel Se Kraftstoff-Einspritzventil für eine Brennkraftmaschine
JP5120293B2 (ja) * 2009-02-20 2013-01-16 株式会社デンソー 燃料噴射弁
CN103615344A (zh) * 2013-11-29 2014-03-05 哈尔滨工程大学 柴油机相继喷油喷油器
NL1041770B1 (en) * 2016-03-18 2017-10-03 Cereus Tech B V Improved fuel injection devices.
DE102016215637A1 (de) * 2016-08-19 2018-02-22 Robert Bosch Gmbh Kraftstoffeinspritzdüse
CN109869252A (zh) * 2019-03-15 2019-06-11 江苏大学 一种高压共轨柴油机的高频响应喷油器

Family Cites Families (23)

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Publication number Priority date Publication date Assignee Title
DE2655793A1 (de) * 1976-12-09 1978-06-22 Maschf Augsburg Nuernberg Ag Gesteuerte mehrloch-einspritzduese
DE2711393A1 (de) * 1977-03-16 1978-09-21 Bosch Gmbh Robert Kraftstoffeinspritzduese
JPS6382066A (ja) * 1986-09-25 1988-04-12 Sony Corp 電子ズ−ム機能付き撮像装置
DE3818862C2 (de) * 1987-06-19 1999-01-07 Volkswagen Ag Kraftstoffeinspritzdüse
DE4123721C1 (en) * 1991-07-17 1992-06-17 Steyr-Daimler-Puch Ag, Wien, At Fuel injection system with pump and nozzle units - has laterally coupled pump duct to chamber in piston bush
DE4408245A1 (de) * 1994-03-11 1995-09-14 Bosch Gmbh Robert Einspritzdüse für Brennkraftmaschinen
JPH10281038A (ja) * 1997-04-01 1998-10-20 Denso Corp 燃料噴射弁
GB9811649D0 (en) * 1998-05-29 1998-07-29 Lucas Ind Plc Fuel injector
JP3823540B2 (ja) * 1998-06-05 2006-09-20 株式会社デンソー 内燃機関用燃料噴射弁
DE60015218T2 (de) * 1999-04-01 2006-02-16 Delphi Technologies, Inc., Troy Brennstoffeinspritzventil
DE19939448A1 (de) * 1999-08-20 2001-03-01 Bosch Gmbh Robert Injektor
DE19946906A1 (de) * 1999-09-30 2001-04-05 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19947196A1 (de) * 1999-10-01 2001-04-05 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
JP4239332B2 (ja) * 1999-11-29 2009-03-18 株式会社豊田中央研究所 内燃機関の燃料噴射装置
DE10100512A1 (de) * 2000-02-07 2001-08-09 Bosch Gmbh Robert Einspritzdüse
DE10031582A1 (de) * 2000-06-29 2002-01-17 Bosch Gmbh Robert Druckgesteuerter Injektor mit gesteuerter Düsennadel
DE10033426B4 (de) * 2000-07-10 2004-10-14 Robert Bosch Gmbh Injektor/Düsennadel-Kombination mit steuerraumseitiger Kopplung
WO2002044427A2 (fr) * 2000-10-27 2002-06-06 President And Fellows Of Harvard College Systemes d'analyse a partir de double et triple lectures
DE10055268A1 (de) * 2000-11-08 2002-05-23 Bosch Gmbh Robert Druckgesteuerter Injektor eines Hochdruckspeichereinspritzsystems
JP3518521B2 (ja) * 2001-04-11 2004-04-12 トヨタ自動車株式会社 内燃機関の燃料噴射制御装置
EP1283336B1 (fr) * 2001-08-06 2007-04-11 Toyota Jidosha Kabushiki Kaisha Moteur à combustion interne
US6725838B2 (en) * 2001-10-09 2004-04-27 Caterpillar Inc Fuel injector having dual mode capabilities and engine using same
JP3882680B2 (ja) * 2001-11-16 2007-02-21 株式会社デンソー 燃料噴射ノズル

Also Published As

Publication number Publication date
JP2005201274A (ja) 2005-07-28
DE502005007871D1 (de) 2009-09-24
DE102004002286A1 (de) 2005-08-11
CN1641207B (zh) 2010-06-23
EP1555429A1 (fr) 2005-07-20
KR20050075719A (ko) 2005-07-21
US20050230501A1 (en) 2005-10-20
CN1641207A (zh) 2005-07-20

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