EP1565650B1 - Dispositif d'injection pour l'injection de carburant - Google Patents

Dispositif d'injection pour l'injection de carburant Download PDF

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Publication number
EP1565650B1
EP1565650B1 EP03767413A EP03767413A EP1565650B1 EP 1565650 B1 EP1565650 B1 EP 1565650B1 EP 03767413 A EP03767413 A EP 03767413A EP 03767413 A EP03767413 A EP 03767413A EP 1565650 B1 EP1565650 B1 EP 1565650B1
Authority
EP
European Patent Office
Prior art keywords
injection
injection device
hole
area
injection hole
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
EP03767413A
Other languages
German (de)
English (en)
Other versions
EP1565650A1 (fr
Inventor
Jürgen BREEDLOVE
Grit KRÜGER
Ferdinand Löbbering
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1565650A1 publication Critical patent/EP1565650A1/fr
Application granted granted Critical
Publication of EP1565650B1 publication Critical patent/EP1565650B1/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
    • 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 present invention relates to an injection device for injecting fuel, in particular for injecting fuel into a combustion chamber of an internal combustion engine.
  • Injection devices for injecting fuel into a combustion chamber of an internal combustion engine are known from the prior art in a wide variety of configurations.
  • injectors are used for high pressure fuel injection.
  • Such injection devices comprise a nozzle needle guided in a nozzle body, wherein a sealing seat is formed on a tip of the nozzle needle for a seal between the nozzle needle and the nozzle body.
  • Below the sealing seat usually a plurality of injection holes are formed, which branch off from a blind hole in the nozzle body. Through these injection holes, the fuel is injected into the combustion chamber.
  • the nozzle body is formed at the end in the form of a cone or truncated cone and the injection holes extend from the outside of the cone inwardly to the blind hole. Due to the arrangement of the injection holes in the conical area results in a non-planar exit surface on the outside of the cone, as shown in Fig. 4. As a result of this, when the fuel jet is viewed in a plane perpendicular to the central axis XX of the spray hole, fuel particles partly already emerge from the injection hole, while at other regions of the spray hole they are still conducted at the spray hole wall. This results in a different deflection of the beam over the exit area and a different fanning of the beam at the exit area.
  • the different guide length of the fuel particles at the exit region leads to non-symmetrical injection geometries and furthermore also to a geometry of the exit jet which is difficult or impossible to reproduce.
  • FIG. 5 furthermore shows a known nozzle, which is inclined to a combustion chamber and in which, due to the inclination, different guide lengths of individual injection holes are present.
  • the guide length at the left injection hole 4 is larger by A than at the right injection hole 4 ', where the guide B is. This also causes scattering of the spray pattern from spray hole to spray hole.
  • this has an outlet region, which lies in a plane perpendicular to a spray hole axis.
  • all edge points are located at the exit region of the injection hole in a plane perpendicular to the injection hole axis, so that a planar exit surface is present. This ensures that the fuel is not guided in the exit region of the injection hole for different lengths, so that an optimal discharge of fuel from the injection hole is achieved. In this case, there are no distractions caused by different injection hole lengths or different fanning of the jet.
  • an exact beam geometry can be obtained.
  • the arrangement according to the invention allows the outlet region in a direction to the injection hole axis vertical plane an exact and faster alignment of the beam. This also allows a more easily reproducible beam geometry, so that the combustion process in the engine can run smoothly.
  • the inventive design of the exit region further improves the atomization within the jet and significantly reduces the pressure dependence of the jet geometry. Another advantage lies in the fact that tests on engine test benches or similar. can be significantly simplified.
  • the exit geometry according to the invention thus provides an optimal exit cone, which leads to an improved combustion process and to improved exhaust emission.
  • the exit region of the injection hole is arranged on a flat-ground outer region of the housing component.
  • the exit area according to the invention can also be provided particularly easily.
  • the outer design of the housing component is designed as a polyhedron.
  • a polyhedron with a substantially conical basic shape can be produced.
  • the outlet region of the injection hole is in a recessed area, in particular by means of depressions.
  • a reduction in the outlet region of the spray hole carried out such that after lowering all edge points of the outlet side injection hole end lie in a plane perpendicular to the injection hole axis.
  • Such a reduction can, for example, before or after the production of the injection hole with an appropriately designed drilling tool or by means of spark erosion or the like. be generated.
  • the housing component in which the injection hole is arranged, a substantially conical or spherical component.
  • the injection device according to the invention is mounted inclined to a combustion chamber axis.
  • the greatest problems have arisen in the state of the art so far, since this results in different length differences and thus different jet geometry of the individual injection holes from injection hole to injection hole. According to the invention, however, this problem can now be solved easily and the same jet geometry can be ensured at each spray hole.
  • the injection device according to the invention is used in particular in storage injection systems, such as common rail systems, for the injection of fuel under high pressure.
  • the present invention achieves particularly good injection results with corresponding advantages in terms of combustion and the exhaust gas behavior, because due to the high pressure, a large amount of fuel within a small period of time with a predetermined, easily reproducible beam geometry is injected.
  • the injection device 1 comprises a housing 2 in the form of a nozzle body, in which a blind hole 3 is formed with a seat 10 cone.
  • a sealing seat 8 on the seat 10 is closed or released in a known manner by a nozzle needle, not shown.
  • released sealing seat flows in a known manner, a pressurized fuel through the blind hole 3 and the injection holes 4 in a combustion chamber of an internal combustion engine.
  • the outlet region 5 of the injection hole 4 of the first embodiment is shown in detail.
  • a depression 6 is formed at the exit region 5 of the injection hole 4 such that the exit region 5 of the injection hole lies in a plane E.
  • all edge points 9 of the outlet-side injection hole end lie in a plane E, which is perpendicular to a spray hole axis YY.
  • This design of the outlet side spray hole end an exact and fast alignment of the spray jet is achieved at NASArechenbarer and reproducible beam geometry.
  • a special uniform beam symmetry of the fuel injected into the combustion chamber can be obtained.
  • the beam is more independent of pressure fluctuations.
  • an improved combustion process can also be obtained.
  • the injection device 1 according to the second embodiment substantially corresponds to that of the first embodiment, wherein instead of the countersinking in the second embodiment, a flat ground area 7 is formed.
  • the plane-ground region 7 forms the plane E, which is arranged perpendicular to the injection-hole axis Y-Y, so that the exit region 5 of the injection hole 4 lies in this plane E.
  • the plane ground area 7 can be generated before or after production of the injection hole 4.
  • the injection device 1 according to the invention is used in particular in accumulator injection systems, such as common rail systems for injecting diesel fuel under high pressure into a combustion chamber.
  • accumulator injection systems such as common rail systems for injecting diesel fuel under high pressure into a combustion chamber.
  • inventive design of the outlet-side end of the injection hole shows significant advantages over the conventional, previously used spray hole geometries, especially at high pressures and pressure fluctuations.

Landscapes

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

Claims (5)

  1. Dispositif d'injection destiné à l'injection de carburant, en particulier dans la chambre de combustion d'un moteur à combustion interne, comportant un boîtier (2) avec au moins un trou de pulvérisation (4) qui comporte une zone d'entrée et une zone de sortie (5), ladite zone de sortie (5) étant située dans un plan (E) perpendiculaire à un axe (Y-Y) du trou de pulvérisation, caractérisé en ce que le plan (E) de la zone de sortie (5) est située dans une zone (7) du boîtier (2) obtenue par rectification plane et, la forme extérieure du boîtier (2) étant un polyèdre.
  2. Dispositif d'injection selon la revendication 1, caractérisé en ce que la zone de sortie (5) est située dans une zone évidée (6), en particulier par lamage.
  3. Dispositif d'injection selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un trou de pulvérisation (4), de forme sensiblement conique ou sphérique, est ménagé dans une partie du boîtier (2).
  4. Dispositif d'injection selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif d'injection est agencé perpendiculairement ou obliquement par rapport à un axe de la chambre de combustion.
  5. Dispositif d'injection selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif d'injection est utilisé dans un système d'injection à accumulation.
EP03767413A 2002-11-27 2003-11-10 Dispositif d'injection pour l'injection de carburant Expired - Lifetime EP1565650B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10255375 2002-11-27
DE2002155375 DE10255375A1 (de) 2002-11-27 2002-11-27 Einspritzvorrichtung zum Einspritzen von Kraftstoff
PCT/DE2003/003717 WO2004048772A1 (fr) 2002-11-27 2003-11-10 Dispositif d'injection pour l'injection de carburant

Publications (2)

Publication Number Publication Date
EP1565650A1 EP1565650A1 (fr) 2005-08-24
EP1565650B1 true EP1565650B1 (fr) 2006-09-06

Family

ID=32335797

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03767413A Expired - Lifetime EP1565650B1 (fr) 2002-11-27 2003-11-10 Dispositif d'injection pour l'injection de carburant

Country Status (3)

Country Link
EP (1) EP1565650B1 (fr)
DE (2) DE10255375A1 (fr)
WO (1) WO2004048772A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008025552A (ja) * 2006-07-25 2008-02-07 Yanmar Co Ltd インジェクタの噴孔穿設方法
DE102013010552A1 (de) 2013-06-15 2014-12-18 Volkswagen Aktiengesellschaft Einspritzvorrichtung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE932209C (de) * 1952-04-13 1955-08-25 Bosch Gmbh Robert Kraftstoffeinspritzventil
GB1088666A (en) * 1964-03-09 1967-10-25 Lister & Co Ltd R A Improvements in or relating to fuel injectors for internal combustion engines
DE68905502T2 (de) * 1988-02-05 1993-09-23 Lucas Ind Plc Brennstoffeinspritzventil.
FR2773852B1 (fr) * 1998-01-20 2000-03-24 Sagem Injecteur de carburant pour moteur a combustion interne a allumage commande
US6422487B1 (en) * 2000-03-30 2002-07-23 Siemens Automotive Corporation Deposit resistant material for a fuel injection seat and method of manufacturing
DE10046306A1 (de) * 2000-09-19 2002-04-04 Bosch Gmbh Robert Brennstoffeinspritzventil
JP3839245B2 (ja) * 2000-11-13 2006-11-01 三菱電機株式会社 燃料噴射弁

Also Published As

Publication number Publication date
DE10255375A1 (de) 2004-06-24
WO2004048772A1 (fr) 2004-06-10
EP1565650A1 (fr) 2005-08-24
DE50304986D1 (de) 2006-10-19

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