EP1339972B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1339972B1
EP1339972B1 EP01995537A EP01995537A EP1339972B1 EP 1339972 B1 EP1339972 B1 EP 1339972B1 EP 01995537 A EP01995537 A EP 01995537A EP 01995537 A EP01995537 A EP 01995537A EP 1339972 B1 EP1339972 B1 EP 1339972B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
valve
valve seat
seat body
injection valve
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
EP01995537A
Other languages
German (de)
English (en)
Other versions
EP1339972A1 (fr
Inventor
Thomas Sebastian
Jens Pohlmann
Martin Maier
Guenter Dantes
Detlef Nowak
Joerg Heyse
Joerg Schlerfer
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1339972A1 publication Critical patent/EP1339972A1/fr
Application granted granted Critical
Publication of EP1339972B1 publication Critical patent/EP1339972B1/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
    • 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
    • F02M61/1853—Orifice plates
    • 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
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached 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
    • F02M61/16—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
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • Fuel injection valves with multiple injection ports are known. They have downstream of a sealing seat, formed of a valve needle and a valve seat surface, a plurality of generally executed as a bore discharge openings, is hosed through the fuel when the valve needle lifted.
  • a fuel injection valve in which a plurality of injection openings are introduced into the valve seat body. In the area of the injection openings, the fuel injection valve is shaped conically outward.
  • the ejection openings are introduced directly into the valve seat body and downstream of the sealing seat, e.g. arranged on several circles of holes.
  • a disadvantage of the specified fuel injection valves are the thick-walled components in which the spray-orifices are to be introduced. These are required in order to withstand the high fuel pressure or combustion chamber pressure.
  • the radial extent of the spray-discharge orifices can not be chosen to be arbitrarily small, because limits are set by the usable processing methods due to the possible aspect ratio. Remedy can be provided only by reducing the number of spray openings, whereby the radial extent of the individual spray openings is increased while maintaining the Monabspritzqueritess. However, this leads to undesirable concentration gradients of the fuel mixture in the combustion chamber.
  • the introduction of the ejection openings is additionally made more difficult.
  • the fuel injection valve according to the features of the main claim has the advantage that the naturalflußblende from a thin disk z. B. a thin membrane or a thin sheet can be produced. This makes it possible, even using cost-effective method, the introduction of smallest spray holes. If the ejection openings are punched, for example, into the flow aperture, then radial expansions in the region of the thickness of the flow aperture can be readily achieved.
  • the arrangement of the thin fürflußblende downstream of the valve seat body also has the advantage that the fürflußblende no mechanical load-bearing functions come.
  • the housing end at the downstream end of the fuel injection valve is formed by the valve seat body.
  • a large number of small ejection openings can be introduced into the flow aperture.
  • the treatment of the sprayed fuel is significantly improved, the sprayed fuel forms a largely homogeneous mixture cloud.
  • the tolerances of the injection orifices to be introduced can be reduced by using well reproducible methods, such as e.g. Punching, kept low.
  • the thus resulting specimen scattering is small and facilitates the design of the fuel injection valve. Ultimately, so the consumption of the internal combustion engine can be reduced.
  • Valve seat body and fürflußblende can have a dome-shaped geometry. On the one hand, this contributes to a lower tendency to coking, on the other hand, the injection orifices can be introduced vertically into the thin fürflußblende, which is brought only in the terminal in its final form. This ensures a vertical outlet of the fuel from the injection openings. Wetting the fürflußbrende can thus be prevented, whereby the coking is further reduced.
  • the fuel injection valve 1 is embodied in the form of a fuel injection valve 1 for fuel injection systems of mixture-compression spark-ignition internal combustion engines.
  • the fuel injection valve 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injection valve 1 comprises a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is operatively connected to a valve closing body 4 which cooperates with a valve seat body 6 arranged on a valve seat body 5 to form a sealing seat.
  • the fuel injection valve 1 is an electromagnetically actuated fuel injection valve 1 which has a plurality of injection openings 7.
  • the nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a magnetic coil 10.
  • the magnetic coil 10 is encapsulated in a coil housing 11 and wound on a bobbin 12, which rests against an inner pole 13 of the magnetic coil 10.
  • the inner pole 13 and the outer pole 9 are separated by a gap 26 and are based on a connecting member 29 from.
  • the magnetic coil 10 is energized via a line 19 from a via an electrical plug contact 17 can be supplied with electric current.
  • the plug contact 17 is surrounded by a plastic casing 18, which may be molded on the inner pole 13.
  • the valve needle 3 is guided in a disc-shaped valve needle guide 14. This is a shim 15 paired, which serves to adjust the Ventilnadelhubes.
  • An armature 20 is located on the upstream side of the adjusting disk 15. This armature is frictionally connected with the valve needle 3 via a flange 21, which is connected to the flange 21 by a weld 22. On the flange 21, a return spring 23 is supported, which is brought in the present design of the fuel injection valve 1 by a pressed-in in the inner pole 13 sleeve 24 to bias.
  • valve needle guide 14 and the armature 20 run fuel channels 30a, 30b.
  • a filter element 25 is arranged in a central fuel supply 16.
  • the Fuel injection valve 1 is sealed by a seal 28 against a fuel line, not shown.
  • the armature 20 In the resting state of the fuel injection valve 1, the armature 20 is acted upon via the flange 21 on the valve needle 3 by the return spring 23 counter to its stroke direction so that the valve closing body 4 is held on the valve seat surface 6 in sealing engagement. Upon energization of the magnetic coil 10, this builds up a magnetic field, which moves the armature 20 against the spring force of the return spring 23 in the stroke direction, wherein the stroke is determined by a located in the rest position between the inner pole 13 and the armature 20 working gap 27. The armature 20 takes the flange 21, which is welded to the valve needle 2, and thus the valve needle 3 also in the stroke direction with.
  • valve closing body 4 which is in operative connection with the valve needle 3, lifts off the valve seat surface 6, the fuel flows past the valve closing body 4, continues through recesses 34, which are arranged in the valve seat body 5, to the ejection openings 7 and is hosed down.
  • the armature 20 drops after sufficient degradation of the magnetic field by the pressure of the return spring 23 on the flange 21 from the inner pole 13, whereby the valve needle 3 moves against the stroke direction.
  • the valve closing body 4 is seated on the valve seat surface 6, and the fuel injection valve 1 is closed.
  • FIG. 1 shows a detailed partial section of a fuel injection valve 1 according to the invention in section II of FIG. 1.
  • Downstream of the valve seat body 5 is a partially dome-shaped flow aperture 31 corresponding to the downstream geometry of the valve seat body 5, eg fixed by a welded connection 36.
  • a plurality of injection openings 7 are introduced, which downstream to the recesses 34 in the Connect valve seat body 5.
  • the arranged in the fürflußblende 31 spray openings 7 represent the narrowest to be flowed through cross section, so that the amount of metered fuel is determined by the total cross section of the spray openings 7.
  • the valve seat body 5 has a central recess 32, the radial extent of which corresponds to the radial extent of the, for example, spherical valve closing body 4. Towards the downstream end, the central recess 32 tapers and forms the valve seat surface 6. Downstream, a plurality of recesses 34 are introduced into the valve seat body 5. These may e.g. be introduced by drilling into the valve seat body 5 and connect the ejection openings 7 with the fuel injected with open fuel injector 1 volume 33 between the valve closing body 4 and the valve seat body fifth
  • the volume 33 is kept small by design of the valve seat body 5 with a corresponding with the valve closing body 4 internal geometry.
  • the inside of the valve seat body 5 may for example have a spherical shape whose radius is slightly smaller than that of the valve closing body 4.
  • the central recess 32 of the valve seat body 5 guides the valve closing body 4 during the stroke.
  • flats 35 are attached to the valve closing body 4.
  • the flow path formed between the flats 35 and the valve seat body 5 in this case has a larger cross section than all spray openings 7 in the fürflußblende 31 in common, so that even with fully open fuel injector 1 as the only limiting flow restricting the fürflußblende 31 with the injection openings 7 introduced therein acts.
  • the introduced in the naturalflußblende 31 injection openings 7 are arranged on the fürflußblende 31, that the upstream end of each discharge opening 7 from a recess 34 of the valve seat body 5 opens.
  • the ejection openings 7 may be arranged, for example, in groups on the fürflußblende 31, so that in each case a group of ejection openings 7 opens out of a respective recess 34 of the valve seat body 5.
  • the ejection openings 7 are preferably introduced before forming the fürflußblende 31 in this. This is done e.g. by exact punching, wherein the punching direction is perpendicular to the surface of the still flat fürflußblende 31st After introduction of the ejection openings 7, the naturalflußblende 31 is brought into its final form. It is for this purpose according to the geometry of the valve seat body 5 z. B. deep-drawn, so that e.g. remains radially around the dome-shaped area around a flat annular flange 37, which is suitable for welding the fürflußblende 31 to the valve seat body 5.
  • the thickness of the disc from which the Siriflußblende 31 is made is dimensioned so that the für assupramine 31 is excited to vibrate by the fuel flowing through the spray openings 7 when the fuel injection valve 1 is open. As a result, pressure conditions arise in the individual emerging fuel jets, which promote finer atomization.

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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)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (7)

  1. Injecteur de carburant pour des installations d'injection de carburant dans des moteurs à combustion interne, comportant une aiguille de soupape (3) et, en liaison active avec elle, un obturateur de soupape (4) qui interagit avec une surface de siège de soupape (6) placée sur un corps de siège de soupape (5) pour former un siège d'étanchéité ainsi que plusieurs cavités (34) pratiquées dans le corps de siège de soupape (5) en aval du siège d'étanchéité,
    caractérisé en ce qu'
    en aval sur le corps de siège de soupape (5) se trouve un limiteur de débit (31) dans lequel est pratiqué pour chacune des cavités (34) au moins un orifice d'éjection (7) dont la section transversale est inférieure à celle de la cavité (34) concernée et qui est disposé de telle manière que sa section transversale d'entrée se trouve entièrement à l'intérieur d'une section transversale de sortie de la cavité (34) concernée.
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    pour chacune des cavités (34) du corps de siège de soupape (5) plusieurs orifices d'éjection (7) sont pratiqués dans le limiteur de débit (31), la section transversale d'entrée de tous les orifices d'éjection (7) placés chacun en aval d'une cavité (34) étant à l'intérieur de la section transversale de sortie de la cavité (34) concernée.
  3. Injecteur de carburant selon la revendication 1 ou 2,
    caractérisé en ce que
    dans une zone centrale le corps de siège de soupape (5) et le limiteur de débit (31) ont chacun une géométrie correspondante en calotte.
  4. Injecteur de carburant selon l'une des revendications 1 à 3,
    caractérisé en ce que
    le limiteur de débit (31) consiste en une membrane mince et il est possible de le faire vibrer.
  5. Injecteur de carburant selon l'une des revendications 1 à 4,
    caractérisé en ce que
    le corps de siège de soupape (5), sur son côté intérieur en aval du siège d'étanchéité, a une forme qui correspond en grande partie à l'obturateur de soupape (4).
  6. Injecteur de carburant selon l'une des revendications précédentes,
    caractérisé en ce que
    les cavités (34) sont pratiquées par perçage dans le corps de siège de soupape (5).
  7. Injecteur de carburant selon l'une des revendications précédentes,
    caractérisé en ce que
    les orifices d'éjection (7) sont pratiqués par matriçage dans le limiteur de débit (31).
EP01995537A 2000-11-30 2001-11-29 Soupape d'injection de carburant Expired - Lifetime EP1339972B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10059420A DE10059420A1 (de) 2000-11-30 2000-11-30 Brennstoffeinspritzventil
DE10059420 2000-11-30
PCT/DE2001/004462 WO2002044552A1 (fr) 2000-11-30 2001-11-29 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1339972A1 EP1339972A1 (fr) 2003-09-03
EP1339972B1 true EP1339972B1 (fr) 2006-01-04

Family

ID=7665217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01995537A Expired - Lifetime EP1339972B1 (fr) 2000-11-30 2001-11-29 Soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US6764031B2 (fr)
EP (1) EP1339972B1 (fr)
JP (1) JP2004514835A (fr)
DE (2) DE10059420A1 (fr)
WO (1) WO2002044552A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10130684A1 (de) * 2001-06-26 2003-02-06 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10150712A1 (de) * 2001-10-13 2003-04-17 Bosch Gmbh Robert Brennstoffeinspritzventil
ITBO20040560A1 (it) * 2004-09-10 2004-12-10 Magneti Marelli Powertrain Spa Iniettore di carburante con valvola di iniezione provvista di alimentazione laterale
ATE461363T1 (de) * 2006-07-27 2010-04-15 Magneti Marelli Spa Kraftstoffeinspritzventil für eine direkteinspritzende brennkraftmaschine
KR101019324B1 (ko) * 2007-01-29 2011-03-07 미쓰비시덴키 가부시키가이샤 연료 분사 밸브
DE102012207406A1 (de) * 2012-05-04 2013-11-07 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
US20140116391A1 (en) * 2012-10-31 2014-05-01 Electro-Motive Diesel, Inc. Fuel system having an injector blocking member
EP3076004B1 (fr) * 2015-04-02 2018-09-12 Continental Automotive GmbH Ensemble de soupape avec un élément de retenue de particules et soupape de fluide
JP6451663B2 (ja) * 2016-02-24 2019-01-16 株式会社デンソー 燃料噴射装置
JP6749148B2 (ja) * 2016-06-10 2020-09-02 日立オートモティブシステムズ株式会社 燃料噴射装置
US20220143633A1 (en) * 2019-02-25 2022-05-12 Cummins Inc. Swirl seat nozzle

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4019752A1 (de) * 1990-06-21 1992-01-02 Bosch Gmbh Robert Brennstoffeinspritzventil
DE4025945C2 (de) * 1990-08-16 1998-10-08 Bosch Gmbh Robert Verfahren zur Einstellung eines Brennstoffeinspritzventils und Brennstoffeinspritzventil
DE4221185A1 (de) 1992-06-27 1994-01-05 Bosch Gmbh Robert Spritzlochscheibe für ein Ventil und Verfahren zur Herstellung
DE4312756A1 (de) * 1993-04-20 1994-10-27 Bosch Gmbh Robert Vorrichtung zur Einspritzung eines Brennstoff-Gas-Gemisches
US5570841A (en) * 1994-10-07 1996-11-05 Siemens Automotive Corporation Multiple disk swirl atomizer for fuel injector
WO1996030644A1 (fr) * 1995-03-29 1996-10-03 Robert Bosch Gmbh Disque perfore, notamment pour soupapes d'injection, et son procede de fabrication
JP3183156B2 (ja) * 1995-04-27 2001-07-03 株式会社デンソー 流体噴射ノズル
DE19636396B4 (de) * 1996-09-07 2005-03-10 Bosch Gmbh Robert Brennstoffeinspritzventil
JP3750768B2 (ja) * 1996-10-25 2006-03-01 株式会社デンソー 流体噴射ノズル
JPH1172067A (ja) 1997-06-24 1999-03-16 Toyota Motor Corp 内燃機関の燃料噴射弁
JP3164023B2 (ja) * 1997-06-25 2001-05-08 トヨタ自動車株式会社 内燃機関の燃料噴射弁
DE19804463B4 (de) 1998-02-05 2006-06-14 Daimlerchrysler Ag Kraftstoffeinspritzsystem für Ottomotoren
DE19856920A1 (de) 1998-12-10 2000-06-15 Bosch Gmbh Robert Brennstoffeinspritzventil
US6330981B1 (en) * 1999-03-01 2001-12-18 Siemens Automotive Corporation Fuel injector with turbulence generator for fuel orifice

Also Published As

Publication number Publication date
DE50108639D1 (de) 2006-03-30
EP1339972A1 (fr) 2003-09-03
US20030132320A1 (en) 2003-07-17
US6764031B2 (en) 2004-07-20
JP2004514835A (ja) 2004-05-20
DE10059420A1 (de) 2002-06-06
WO2002044552A1 (fr) 2002-06-06

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