EP1907688B1 - Dispositif de retenue - Google Patents

Dispositif de retenue Download PDF

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Publication number
EP1907688B1
EP1907688B1 EP06763477.4A EP06763477A EP1907688B1 EP 1907688 B1 EP1907688 B1 EP 1907688B1 EP 06763477 A EP06763477 A EP 06763477A EP 1907688 B1 EP1907688 B1 EP 1907688B1
Authority
EP
European Patent Office
Prior art keywords
hold
down device
fuel injection
injection valves
fuel
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
EP06763477.4A
Other languages
German (de)
English (en)
Other versions
EP1907688A1 (fr
Inventor
Ingo Rettig
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 EP1907688A1 publication Critical patent/EP1907688A1/fr
Application granted granted Critical
Publication of EP1907688B1 publication Critical patent/EP1907688B1/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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53552—Valve applying or removing
    • Y10T29/53561—Engine valve spring compressor [only]
    • Y10T29/53565—Plural spring engagement

Definitions

  • the invention is based on a hold-down device for fastening one or more fuel injection valves in a cylinder head of an internal combustion engine according to the preamble of the main claim.
  • Hold-down systems of this type are usually designed individually for each fuel injection valve of an internal combustion engine.
  • the fuel injection valve is connected either directly to the fuel distributor line and pressed into the cylinder head via a hold-down element through the fuel distributor line or held down in the cylinder head by a clamping claw, which is supported on a shoulder of the fuel injection valve.
  • a fastening device for the mutual attachment of a fuel injection valve in a cylinder head of an internal combustion engine and for fixing to a fuel distributor line forth.
  • the fastening device is designed in the form of a spring clip which is elastically clamped between each shoulder of the fuel injection valve and the fuel distributor line.
  • a fastening device for fastening a fuel injection valve for direct injection of fuel into the combustion chamber of an internal combustion engine in a cylinder head of the internal combustion engine known.
  • the fastening device comprises a holding-down device, which is attached to the fuel injection valve, wherein the hold-down is designed as a flat component and located on a the Fuel injection valve encompassing sleeve is supported, which bears against a preferably metallic collar of the fuel injection valve.
  • a hold-down device for elastic attachment of a plurality of fuel injection valves which are held down for direct injection of fuel into the combustion chamber of an internal combustion engine in a cylinder head of the internal combustion engine with spring elements.
  • the hold-down device is in the form of a rail serving as a longitudinal member yoke.
  • the spring elements are introduced as a tensioning means between the yoke and the fuel injection valves and serve the targeted tensioning of the fuel injection valves with a required contact pressure.
  • the clamping means are designed as disc spring package or screw-nut combinations. For receiving the fuel injection valves corresponding bores are formed in the side member yoke.
  • EP 0385820 discloses another hold-down device.
  • the holding-down device according to the invention for a fuel injection valve with the characterizing features of the main claim has the advantage that a plurality of fuel injection valves, for example, all fuel injectors of a cylinder bank, can be held down by a common holddown in a simple and secure manner and Consequently, a single, complex attachment of the fuel injection valves on the cylinder head is eliminated.
  • the hold-down device provides both a carry-over of the hold-down force to the fuel injection valves as well as a tolerance and offset compensating flexible fixation. It is advantageous that according to the invention flexible spring elements are provided, which are either formed integrally with the hold-down or between the hold-down device and the fuel injection valves are arranged, thereby allowing tolerance compensation while simplifying manufacture and assembly.
  • the hold-down device is provided with a U-shaped profile, which can be produced in a simple manner, for example by bending and punching.
  • FIG. 2 and 3 Two embodiments of inventively designed hold-down devices are shown, for better understanding of the measures according to the invention, the usual hold-down concepts based on Fig. 1A and 1B briefly explained.
  • Fig. 1A and 1B show schematic partial sections through embodiments of hold-down devices for each of a fuel injection valve according to the prior art.
  • a fuel injection valve 1 is hereby stirred in the form of a directly injecting fuel injection valve 1, which is installed in a cylinder head 2 for the direct injection of fuel into a combustion chamber of a non-illustrated, in particular mixture-compressing, spark-ignited or self-igniting internal combustion engine.
  • the fuel injection valve 1 has at a feed-side end 3 a screw connection to a fuel line, not shown.
  • the fuel injection valve 1 has an electrical connection 4 for the electrical contacting for actuating the fuel injection valve 1.
  • a separate fuel line is mounted per fuel injection valve 1.
  • the fuel injection valves 1 are each secured individually in the cylinder head 2. This can, for example, as in Fig. 1A shown, a clamping screw 5 with a hold-down claw 6, which rests against a shoulder 7 of the fuel injection valve 1 and the fuel injection valve 1 presses by the clamping screw 5 under conditional recording of lateral forces in the cylinder head 2.
  • a common hold-down device 10 with spring elements 11.
  • the spring elements 11 serve to compensate manufacturing and installation-related axial and radial tolerances.
  • the erfmdungswashe embodiment reduces and simplifies the required components, their manufacturing and assembly costs, including the manufacturing costs and the processing of the connection geometries on the internal combustion engine.
  • FIG Fig. 2 A first exemplary embodiment of a hold-down device 10 designed according to the invention is shown in FIG Fig. 2 shown in a schematic perspective view.
  • the hold-down device 10 in this case has a simple basic shape, which may be formed, for example, rail-shaped with a U-shaped cross-section, wherein the U-shape facing away from the cylinder head 2 opens.
  • a shape is easily obtained e.g. can be produced by punching and bending and can be adapted to the contours of the cylinder head 2 in any manner deviating from the illustrated straight shape.
  • the hold-down device 10 is mounted by means of clamping screws 5 on the cylinder head 2, whereby the position of the fuel injection valves 1 to each other and relative to the cylinder head 2 can be defined.
  • the number of clamping screws 5 is at least two, since the Hold-down device 10 has an elongated shape. In the embodiment, three clamping screws 5 are provided.
  • sleeves 12 may be provided on the hold-down device 10, which are penetrated by the clamping screws 5.
  • the hold-down device 10 also has recesses 13, the number of which corresponds to the number of fuel injection valves 1.
  • the recesses 13 are designed so that they form a positive connection together with the shoulders 7 of the fuel injection valves 1. As a result, it can be ensured that the position of the hold-down device 10 relative to the fuel injection valves 1 or the position of the fuel injection valves 1 relative to one another can not change.
  • the recesses 13 can also be introduced by punching in the hold-down device 10.
  • a spring element 11 per fuel injection valve 1 is inserted between it and the fuel injection valves 1, which transmit the hold-down force to the fuel injection valves 1.
  • the spring elements 11 are elastically or plastically-elastically deformed.
  • the spring elements 11 may be formed sleeve-shaped with spring tongues 11a, which rest against the hold-down device 10. However, the spring tongues 11 a may also be aligned in the direction of the fuel injection valves 1 and be supported on the shoulders 7 of the fuel injection valves 1.
  • Fig. 3 shows in the same view as Fig. 2 a second embodiment of an inventively designed hold-down device 10. The same components are provided for clarity with the same reference numerals.
  • the in Fig. 3 illustrated second embodiment of an inventively designed hold-down device 10 integrally formed with this spring elements 11.
  • spring elements 11 While in Fig. 2 the spring elements 11 are formed sleeve-shaped with spring tongues 11a, which rest against the hold-down device 10 and allow by their resilient training the absorption of the forces acting, are in Fig. 3 only spring clip 11 b is provided, which are advantageously integrally formed with the hold-down device 10 or manufactured separately and connected to the hold-down device 10 in a suitable manner.
  • the hold-down device 10 also has a U-shaped shape, but is oriented in the second embodiment with the opening of the U-shape to the cylinder head 2. This is advisable, since the spring clips 11b are usefully supported on the bent legs 16 of the U-shaped hold-down device 10 or continue directly from these.
  • the invention is also applicable to hold-down devices 10 for fuel injection valves 1 for injecting fuel into the combustion chamber of a self-igniting internal combustion engine.

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

Claims (14)

  1. Dispositif de retenue (10) pour la fixation élastique de plusieurs injecteurs de carburant (1), qui sont retenus avec des éléments de ressort (11) dans une culasse (2) d'un moteur à combustion interne pour l'injection directe de carburant dans la chambre de combustion du moteur à combustion interne, dans lequel le dispositif de retenue (10) est réalisé en forme de rail avec des évidements (13) destinés à recevoir les multiples injecteurs de carburant (1), dans lequel les éléments de ressort (11) sont serrés de façon déformable élastiquement et/ou plastiquement-élastiquement entre le dispositif de retenue (10) et les injecteurs de carburant (1) et transmettent la force de retenue aux injecteurs de carburant (1), caractérisé en ce que les injecteurs de carburant (1) traversent avec leurs extrémités d'entrée les évidements (13) dans le dispositif de retenue en forme de rail (10) et sont raccordés à des conduites de carburant (15) sur le côté du dispositif de retenue (10) situé à l'opposé des éléments de ressort (11).
  2. Dispositif de retenue selon la revendication 1, caractérisé en ce que les évidements (13) sont réalisés de telle manière qu'un assemblage par emboîtement soit réalisé entre le dispositif de retenue (10) et les multiples injecteurs de carburant (1).
  3. Dispositif de retenue selon la revendication 1 ou 2, caractérisé en ce que les évidements (13) sont pratiqués par découpage dans le dispositif de retenue (10).
  4. Dispositif de retenue selon la revendication 2, caractérisé en ce que le dispositif de retenue (10) présente un profil en forme de U.
  5. Dispositif de retenue selon la revendication 1, caractérisé en ce que les éléments de ressort (11) présentent des lamelles de ressort élastiques (11a).
  6. Dispositif de retenue selon la revendication 5, caractérisé en ce que les lamelles de ressort (11a) des éléments de ressort (11) s'appliquent sur le dispositif de retenue (10) ou sur des épaulements (7) des injecteurs de carburant (1).
  7. Dispositif de retenue selon la revendication 5 ou 6, caractérisé en ce que le dispositif de retenue (10) est détourné de la culasse (2) avec un côté ouvert du profil en U.
  8. Dispositif de retenue selon la revendication 1, caractérisé en ce que les éléments de ressort (11) sont réalisés d'une seule pièce avec le dispositif de retenue (10).
  9. Dispositif de retenue selon la revendication 8, caractérisé en ce que les éléments de ressort (11) sont réalisés sous la forme d'étriers de ressort (11b).
  10. Dispositif de retenue selon la revendication 9, caractérisé en ce que les étriers de ressort (11b) se prolongent à partir de branches du dispositif de retenue en forme de U (10).
  11. Dispositif de retenue selon l'une quelconque des revendications 8 à 10, caractérisé en ce que le dispositif de retenue (10) est tourné vers la culasse (2) avec un côté ouvert du profil en U.
  12. Dispositif de retenue selon l'une quelconque des revendications 1 à 11, caractérisé en ce que le dispositif de retenue (10) est fixé à la culasse (2) du moteur à combustion interne au moyen d'au moins deux vis de serrage (5).
  13. Dispositif de retenue selon la revendication 12, caractérisé en ce que le dispositif de retenue (10) présente des douilles (12), qui sont traversées par les vis de serrage (5).
  14. Dispositif de retenue selon la revendication 1, caractérisé en ce que les conduites de carburant (15), les injecteurs de carburant (1) et le dispositif de retenue (10) sont assemblés par des écrous-raccords (14).
EP06763477.4A 2005-07-15 2006-06-02 Dispositif de retenue Expired - Fee Related EP1907688B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005033139A DE102005033139A1 (de) 2005-07-15 2005-07-15 Niederhaltevorrichtung
PCT/EP2006/062856 WO2007009839A1 (fr) 2005-07-15 2006-06-02 Dispositif de retenue

Publications (2)

Publication Number Publication Date
EP1907688A1 EP1907688A1 (fr) 2008-04-09
EP1907688B1 true EP1907688B1 (fr) 2018-05-16

Family

ID=36699349

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06763477.4A Expired - Fee Related EP1907688B1 (fr) 2005-07-15 2006-06-02 Dispositif de retenue

Country Status (5)

Country Link
US (1) US20090188470A1 (fr)
EP (1) EP1907688B1 (fr)
JP (1) JP2009501291A (fr)
DE (1) DE102005033139A1 (fr)
WO (1) WO2007009839A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008025744B4 (de) 2008-05-29 2015-12-17 Volkswagen Ag Brennkraftmaschine mit Spannpratze für Kraftstoffeinspritzventile
DE102008063645A1 (de) 2008-12-18 2010-06-24 Volkswagen Ag Brennkraftmaschine mit Spannpratze für Kraftstoffeinspritzvorrichtung
DE102009006901A1 (de) * 2009-01-30 2010-08-05 Audi Ag Befestigungsvorrichtung für ein Kraftstoffeinspritzventil
FR2950396B1 (fr) * 2009-09-22 2012-04-27 Mark Iv Systemes Moteurs Sa Module fonctionnel integrant un repartiteur et une rampe d'injection et son procede de fabrication
DE102010064115A1 (de) * 2010-12-23 2012-06-28 Robert Bosch Gmbh Injektoranordnung, die vorzugsweise für Erdgas dient
JP5810726B2 (ja) * 2011-08-09 2015-11-11 マツダ株式会社 直噴式エンジン用フューエルレールアッシーの組付方法
US9751167B1 (en) 2013-10-29 2017-09-05 Clayton Note Injector cup pressing tools
JP5929938B2 (ja) * 2014-01-30 2016-06-08 株式会社豊田自動織機 インジェクタの固定構造
JP7348891B2 (ja) * 2020-12-28 2023-09-21 株式会社クボタ 電子燃料噴射式ディーゼルエンジン

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0385820A1 (fr) * 1989-02-27 1990-09-05 Automobiles Peugeot Agencement pour le maintien et le positionnement de plusieurs injecteurs de carburant sur un moteur à combustion interne

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5680845A (en) * 1996-09-06 1997-10-28 Industrial Technology Research Institute Alignment device of dual-spray injectors for internal combustion engine
JP2000145580A (ja) * 1998-11-11 2000-05-26 Isuzu Motors Ltd インジェクタの固定構造
DE10032003A1 (de) * 2000-06-30 2002-01-10 Fev Motorentech Gmbh Kolbenbrennkraftmaschine mit biegesteifem Joch zur abdichtenden Befestigung von Kraftstoffeinspritzeinrichtungen
DE10112665A1 (de) * 2001-03-16 2002-09-19 Bosch Gmbh Robert Befestigungsvorrichtung
DE10133264A1 (de) 2001-07-09 2003-02-06 Bosch Gmbh Robert Befestigungsvorrichtung
DE10239142A1 (de) * 2002-08-27 2004-04-29 Daimlerchrysler Ag Kraftstoffeinspritzvorrichtung für eine Brennkraftmaschine
EP1529955A1 (fr) * 2003-11-06 2005-05-11 Renault s.a.s. Moyens de serrage d'un injecteur de carburant
JP4840391B2 (ja) * 2008-03-28 2011-12-21 株式会社デンソー 燃圧センサ搭載構造及び燃圧検出システム

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0385820A1 (fr) * 1989-02-27 1990-09-05 Automobiles Peugeot Agencement pour le maintien et le positionnement de plusieurs injecteurs de carburant sur un moteur à combustion interne

Also Published As

Publication number Publication date
EP1907688A1 (fr) 2008-04-09
DE102005033139A1 (de) 2007-01-25
WO2007009839A1 (fr) 2007-01-25
US20090188470A1 (en) 2009-07-30
JP2009501291A (ja) 2009-01-15

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