EP1751422B1 - Soupape d'injection de carburant a dispositif d'allumage integre - Google Patents

Soupape d'injection de carburant a dispositif d'allumage integre Download PDF

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Publication number
EP1751422B1
EP1751422B1 EP05726241A EP05726241A EP1751422B1 EP 1751422 B1 EP1751422 B1 EP 1751422B1 EP 05726241 A EP05726241 A EP 05726241A EP 05726241 A EP05726241 A EP 05726241A EP 1751422 B1 EP1751422 B1 EP 1751422B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
electrode
valve according
housing
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 - Fee Related
Application number
EP05726241A
Other languages
German (de)
English (en)
Other versions
EP1751422A1 (fr
Inventor
Manfred Vogel
Werner Herden
Rainer Ecker
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 EP1751422A1 publication Critical patent/EP1751422A1/fr
Application granted granted Critical
Publication of EP1751422B1 publication Critical patent/EP1751422B1/fr
Expired - Fee Related 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/06—Fuel-injectors combined or associated with other devices the devices being sparking plugs
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/24—Fuel-injection apparatus with sensors

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • a fuel injection valve with an integrated ignition device known.
  • a spark gap is formed on the discharge side of the spray-discharge openings.
  • a disadvantage of the fuel injection valve known from the above document is that in particular the fuel-air mixture is ignited by only a spark gap only at one point in the combustion chamber. The time to spread the flame in the combustion chamber is thereby disadvantageously increased.
  • the ignition electrodes are aligned or provided with edges in the vicinity of the injection orifice in order to reproducibly fix the position of the flashover on the end face of the valve body with respect to the position of the injection orifice.
  • Kambination the fuel injection valve and the ignition device are arranged in a common housing Since the spark gaps are directly between the ignition electrodes and the valve body, in particular the valve body is exposed to extreme stresses on its face, over the life of a high risk of uncontrolled burnup or unwanted deposits, which are particularly disadvantageous because they are in the immediate vicinity of the injection orifice, so that it can lead to undesirable changes in the beam pattern.
  • the fuel injection valve according to the invention with integrated ignition device with the characterizing features of the main claim has the advantage that the fuel-air mixture can be completely ignited much faster. Due to the resulting significantly faster overall combustion of the efficiency is increased. In addition, bulky end portions of the spray are avoided, thereby achieving less spread of the lambda range of the spray with the consequence of reduced hydrocarbon emissions. Furthermore, in the fuel injection valve according to the invention with integrated ignition device, a higher exhaust gas recirculation rate and / or a leaner shift operation with the consequence of reduced nitrogen oxide emissions is possible.
  • the pairs of electrodes are arranged so that the spark gaps are distributed uniformly around the spray-discharge openings and / or the spark gaps are arranged on a circle around the spray-discharge openings.
  • the fuel-air mixture is ignited uniformly, and the fuel-air mixture can burn evenly and homogeneously in the combustion chamber. The time for complete ignition of the entire fuel-air mixture in the combustion chamber is minimized.
  • the housing is also advantageous to manufacture from an electrically conductive material, in particular metal.
  • the housing can thereby be used as an electrical pole or as a ground electrode for the electrode pairs.
  • the ignition voltage can be selected small.
  • the thickness of the insulator can be made smaller.
  • FIGS. 2 and 3 Before using the FIGS. 2 and 3 a preferred embodiment of the invention will be described in more detail, is to better understand the invention first with reference to Fig. 1 a fuel injector without integrated ignition device are briefly explained with respect to its essential components.
  • Fig. 2 drawn arrows show the course of the flame front of the ignited fuel-air mixture in the combustion chamber.
  • FIG. 1 An in Fig. 1 shown example of a fuel injection valve 1 without integrated ignition device is designed 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 without integrated ignition device consists of a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 has the discharge side a valve closing body 4 which cooperates with a arranged on a valve seat body 5 valve seat surface 6 to a sealing seat.
  • the fuel injection valve 1 in the exemplary embodiment is an inwardly opening fuel injection valve 1 which has an injection opening 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 distance 26 and connected to each other by a non-ferromagnetic connecting member 29.
  • the magnetic coil 10 is energized via an electrical line 19 from a via an electrical plug contact 17 can be supplied electric current.
  • the plug contact 17 is of a Surround plastic casing 18, which may be molded on the inner pole 13.
  • valve needle 3 is guided in a valve needle guide 14, which is designed disk-shaped.
  • armature 20 On the other side of the shim 15 is the armature 20. This is connected via a first flange 21 with the valve needle 3 in connection, which is connected by a weld 22 with the first flange 21.
  • a helical return spring 23 On the first flange 21, a helical return spring 23 is supported, which is brought in the present design of the fuel injection valve 1 by a sleeve 24 to bias.
  • valve needle guide 14 in the armature 20 and on a guide element 36 extend fuel channels 30, 31 and 32.
  • the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25.
  • the fuel injection valve 1 is sealed by a rubber ring 28 against a fuel distributor line, not shown, and by a seal 37 against a cylinder head, not shown.
  • annular damping element 33 On the discharge side of the armature 20, an annular damping element 33, which consists of an elastomer material, arranged. It rests on a second flange 34, which is materially connected to the valve needle 3 via a weld seam 35.
  • the armature 20 In the idle state of the fuel injection valve 1, the armature 20 is acted upon by the return spring 23 against 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 solenoid 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 12 and the armature 20 working gap 27.
  • the armature 20 takes the first flange 21, which is welded to the valve needle 3, also in the stroke direction with.
  • the standing with the valve needle 3 in connection valve closing body 4 lifts from the valve seat surface 6, and the pressurized supplied fuel is sprayed through the injection opening 7 in the combustion chamber, not shown.
  • the armature 20 drops after sufficient degradation of the magnetic field by the pressure of the return spring 23 from the inner pole 13, whereby the valve connected to the needle 3 in communication first flange 21 moves against the stroke direction.
  • the valve needle 3 is thereby moved in the same direction, whereby the valve closing body 4 touches on the valve seat surface 6 and the fuel injection valve 1 is closed.
  • Fig. 2 shows a schematic section through an inventive embodiment of a fuel injection valve 1 with integrated igniter in the discharge side region.
  • the illustrated fuel injection valve 1 is designed as a multi-hole valve and opens inwards.
  • the integrated igniter has two pairs of electrodes.
  • a first electrode pair consists of a first ground electrode 38 and a first center electrode 39.
  • a second pair of electrodes consists of a second ground electrode 44 and a second center electrode 45.
  • the cylindrical nozzle body 2 of the fuel injection valve 1 extends in a perfectly fitting hollow cylindrical housing 40 and closes off laterally with the injection-side end of the housing 40.
  • a first hollow cylindrical insulator 42 in which the first center electrode 39 extends
  • a second hollow cylindrical insulator 47 in which the second center electrode 45 extends
  • the insulating body 42, 47 consist for example of a ceramic material.
  • the nozzle body 2 and the housing 40 be made in one piece in other embodiments.
  • the two insulating body 42, 47 protrude slightly beyond the discharge-side end of the housing 40. This serves in particular to prevent leakage currents between the electrodes.
  • the two center electrodes 39, 45 initially coaxial with the central axis of the respective insulating body 42, 47 to extend after a short distance approximately at right angles to it.
  • the two ground electrodes 38, 44 are fixed electrically conductively on opposite sides of the ejection openings 7 by welding in the region of the outer edge of the ejection-side side of the housing 40. Starting from the housing 40, they first run parallel to the course of the respective associated central electrodes 39, 45 in order to bend at right angles at the same height as the central electrodes 39, 45.
  • the ends of the respective center electrodes 39, 45 and the ends of the respective ground electrodes 38, 44 face each other and are penetrated by Fig. 3 Sparks shown in detail 41, 46 spaced.
  • spark gaps 41, 46 are located on opposite sides of the injection openings 7, two flame fronts spread in the combustion chamber, not shown, which are first directed away from each other, then run to a piston bottom, not shown, and finally run there to each other.
  • the time for complete ignition of the fuel-air mixture in the combustion chamber, not shown, is thereby almost halved.
  • the two spark gaps 41, 46 are ignited simultaneously, with a time-offset ignition is conceivable, for example, to consider different maturities of the two flame fronts in non-symmetrical combustion chamber geometries. Likewise, this may be necessary if the fuel injection valve 1 according to the invention is not arranged centrally in a combustion chamber roof, not shown.
  • a temperature sensor 49 and a pressure sensor 48 are introduced into the housing 40.
  • Fig. 3 shows a plan view of the discharge-side end of the fuel injection valve 1 according to the invention with integrated ignition device.
  • the spark gaps 41, 46 are clearly visible on opposite sides of the spray-discharge openings 7.
  • more than two spark gaps 41, 46 may be arranged around the ejection openings 7, which are then arranged, for example, uniformly and in a circle around the ejection openings 7.
  • the end of the first center electrode 39 and the end of the first ground electrode 38 face each other.
  • the end of the second center electrode 45 and the end of the second ground electrode 44 are also directed toward each other.
  • the surfaces of the ends of the respective electrodes 38, 39, 44, 45 facing each other run parallel to each other.
  • the spacings of the ends of the respective electrode pairs are advantageously only 50 to 300 micrometers.
  • the height of the ignition voltage can be lowered thereby and the thickness of the insulating body 42, 47 can be reduced without compromising the reliability of the fuel injection valve 1 with integrated ignition device, since the spray 43 flowing past the so-called "Entrainment-flow" generated, which deflects the only short spark and pulls into the spray.
  • the ignition of the two spark gaps 41, 46 can either through a single ignition coil, not shown, connected in series, in which case one of the two ground electrodes 38, 44 must be mounted isolated or performed, or carried out by a double spark coil.
  • the ignition of more than two spark gaps 41, 46 can be either via a single ignition coil connected in series, then the ground electrodes of n-1 spark gaps isolated mounted or performed, or by using one or more double spark coils or a Combination of double spark coils and single ignition coils.
  • the described fuel injection valve 1 with integrated ignition device can be additionally combined as a structural unit with one or more ignition coils arranged behind it in the axial direction or an ignition coil arranged behind it.
  • the invention is not limited to the illustrated embodiments and may be e.g. also be used for outward opening or spin-generating fuel injection valves 1 with integrated igniter.

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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)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Spark Plugs (AREA)

Claims (10)

  1. Injecteur de carburant (1) comportant un dispositif d'allumage intégré, ayant une première paire d'électrodes (38, 39) pour allumer le carburant injecté directement dans la chambre de combustion d'un moteur à combustion interne par des orifices d'éjection (7) d'un injecteur de carburant (1),
    la paire d'électrodes (38, 39) se composant d'une électrode de masse (38) et d'une électrode centrale (39), ces électrodes étant écartées d'un chemin d'étincelles (41) et
    l'injecteur de carburant (1) et le dispositif d'allumage (38, 39, 41, 42) sont logés dans un boîtier commun (40),
    caractérisé en ce que
    le dispositif d'allumage (38, 39, 41, 42) comporte au moins une autre paire d'électrodes (44, 45) ayant un autre chemin d'étincelles (46) et
    la seconde paire d'électrodes (44, 45) est formée par une seconde électrode de masse (48) et une seconde électrode centrale (45) et la première électrode centrale (39) passe dans un premier corps isolant (42) cylindrique creux et la seconde électrode centrale (45) passe dans un second corps isolant cylindrique creux (47).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    les paires d'électrodes (38, 39, 44, 45) sont disposées pour que les chemins d'étincelles (41, 46) soient répartis régulièrement autour des orifices d'éjection (7).
  3. Injecteur de carburant selon la revendication 1 ou la revendication 2,
    caractérisé en ce que
    les chemins d'étincelles (41, 46) sont disposés suivant un cercle entourant les orifices d'éjection (7).
  4. Injecteur de carburant selon la revendication 3,
    caractérisé en ce que
    les orifices d'éjection (7) sont installés en position centrale dans le cercle.
  5. Injecteur de carburant selon l'une des revendications précédentes,
    caractérisé en ce que
    le boîtier (40) est en une matière électroconductrice et en particulier en métal.
  6. Injecteur de carburant selon la revendication 5,
    caractérisé en ce que
    les électrodes de masse (38, 44) des paires d'électrodes (38, 39, 44, 45) sont en bon contact électroconducteur avec le boîtier (40).
  7. Injecteur de carburant selon les revendications 5 ou 6,
    caractérisé en ce que
    les électrodes de masse (38, 44) sont assemblées au boîtier (40) par une liaison par la matière, notamment par soudage ou soudage par laser.
  8. Injecteur de carburant selon l'une des revendications précédentes,
    caractérisé en ce que
    les chemins à étincelles (41, 46) ont une longueur comprise entre 50 micro-mètres (µm) et 300 micro-mètre (µm).
  9. Injecteur de carburant selon l'une des revendications précédentes,
    caractérisé en ce que
    les électrodes (38, 39, 44, 45) sont au moins en partie en platine.
  10. Injecteur de carburant selon l'une des revendications précédentes,
    caractérisé en ce qu'
    un capteur de pression (48) et/ou un capteur de température (49) sont intégrés dans le boîtier (40) pour mesurer la pression et/ou mesurer la température dans la chambre de combustion.
EP05726241A 2004-05-18 2005-03-18 Soupape d'injection de carburant a dispositif d'allumage integre Expired - Fee Related EP1751422B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004024535A DE102004024535A1 (de) 2004-05-18 2004-05-18 Brennstoffeinspritzventil mit integrierter Zündvorrichtung
PCT/EP2005/051262 WO2005113975A1 (fr) 2004-05-18 2005-03-18 Soupape d'injection de carburant a dispositif d'allumage integre

Publications (2)

Publication Number Publication Date
EP1751422A1 EP1751422A1 (fr) 2007-02-14
EP1751422B1 true EP1751422B1 (fr) 2008-06-11

Family

ID=34963291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05726241A Expired - Fee Related EP1751422B1 (fr) 2004-05-18 2005-03-18 Soupape d'injection de carburant a dispositif d'allumage integre

Country Status (5)

Country Link
US (1) US20080072871A1 (fr)
EP (1) EP1751422B1 (fr)
JP (1) JP4243629B2 (fr)
DE (2) DE102004024535A1 (fr)
WO (1) WO2005113975A1 (fr)

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US8413634B2 (en) * 2008-01-07 2013-04-09 Mcalister Technologies, Llc Integrated fuel injector igniters with conductive cable assemblies
US8365700B2 (en) * 2008-01-07 2013-02-05 Mcalister Technologies, Llc Shaping a fuel charge in a combustion chamber with multiple drivers and/or ionization control
JP4483955B2 (ja) * 2008-02-28 2010-06-16 株式会社デンソー エンジンヘッドモジュール
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EP2470775B1 (fr) 2009-08-27 2015-04-29 McAlister Technologies, LLC Mise en forme d'une charge de carburant dans une chambre de combustion à l'aide de plusieurs systèmes d'entraînement et/ou de commande d'ionisation
KR101364416B1 (ko) 2009-12-07 2014-02-17 맥알리스터 테크놀로지즈 엘엘씨 대형 엔진 적용에 적합한 일체식 연료 인젝터 점화기 및 연관된 이용 및 제조방법
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WO2011100717A2 (fr) 2010-02-13 2011-08-18 Mcalister Roy E Procédés et systèmes de refroidissement adaptatif de chambres de combustion dans des moteurs
US20110297753A1 (en) 2010-12-06 2011-12-08 Mcalister Roy E Integrated fuel injector igniters configured to inject multiple fuels and/or coolants and associated methods of use and manufacture
US8528519B2 (en) 2010-10-27 2013-09-10 Mcalister Technologies, Llc Integrated fuel injector igniters suitable for large engine applications and associated methods of use and manufacture
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Also Published As

Publication number Publication date
DE502005004411D1 (de) 2008-07-24
JP2006524781A (ja) 2006-11-02
WO2005113975A1 (fr) 2005-12-01
DE102004024535A1 (de) 2005-12-15
US20080072871A1 (en) 2008-03-27
EP1751422A1 (fr) 2007-02-14
JP4243629B2 (ja) 2009-03-25

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