EP1907688A1 - Dispositif de retenue - Google Patents

Dispositif de retenue

Info

Publication number
EP1907688A1
EP1907688A1 EP06763477A EP06763477A EP1907688A1 EP 1907688 A1 EP1907688 A1 EP 1907688A1 EP 06763477 A EP06763477 A EP 06763477A EP 06763477 A EP06763477 A EP 06763477A EP 1907688 A1 EP1907688 A1 EP 1907688A1
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.)
Granted
Application number
EP06763477A
Other languages
German (de)
English (en)
Other versions
EP1907688B1 (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
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 thereby either connected directly to the fuel distributor line and pressed by a hold-down element through the fuel distributor line in the cylinder head or held down in the cylinder head by a clamping claw, which is supported on a shoulder of the fuel injection valve.
  • DE 101 33 264 A1 discloses 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.
  • 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.
  • DE 101 12 665 A1 discloses a fastening device for fastening a fuel injection valve for the direct injection of fuel into the combustion chamber of an internal combustion engine into a cylinder head of the internal combustion engine.
  • Fastening device comprises a hold-down, 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.
  • the hold-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 injectors, for example, all fuel injectors a cylinder bank, can be held down by a common holddown in a simple and secure manner and therefore a single, complex attachment of the fuel injectors on the cylinder head 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.
  • 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.
  • flexible spring elements are provided, which are either formed integrally with the hold-down device or are arranged between the hold-down device and the fuel injection valves and thereby allow a tolerance compensation with simultaneous ease of manufacture and assembly.
  • Fig. 2 is a schematic perspective view of a first embodiment of an inventively designed hold-down device for fuel injection valves
  • Fig. 3 is a schematic perspective view of a second embodiment of an inventively designed hold-down device for fuel injection valves.
  • FIGS. 2 and 3 Before two exemplary embodiments of inventively configured hold-down devices are shown with reference to FIGS. 2 and 3, the conventional hold-down concepts will be briefly explained with reference to FIGS. 1A and 1B for better understanding of the measures according to the invention. - A -
  • FIGS. 1A and 1B show schematic partial sections through exemplary embodiments of hold-down devices for a respective fuel injection valve according to the prior art.
  • a fuel injection valve 1 is embodied 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 be, for example, as shown in Fig. IA, a clamping screw 5 with a hold down 6, which rests against a shoulder 7 of the fuel injector 1 and the fuel injector 1 presses by the clamping screw 5 under conditional recording of lateral forces in the cylinder head 2.
  • Fuel injectors 1 from the cylinder head 2 can be received only insufficient, which can lead to damage to the fuel injectors 1 and leaks in the connection between the fuel injector 1 and fuel line.
  • the latter in particular, should be taken into account with regard to increasing fuel and combustion chamber pressures and ever stricter guidelines with regard to exhaust and fuel emissions.
  • resulting from the connection of fuel injectors 1 in recordings of all fuel injectors 1 supplying fuel rail, which is usually rohrformig and extends along the cylinder head 2 disadvantageous installation situations, since the available space in the engine compartment of many vehicles is increasingly low.
  • the fuel rail can be due to the
  • 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 embodiment according to the invention reduces and simplifies the required components, their manufacturing and assembly costs, including the production costs and the processing of the connection geometries on the internal combustion engine.
  • FIG. 2 A first exemplary embodiment of an inventively designed hold-down device 10 is shown in FIG. 2 in a schematic perspective view.
  • the hold-down device 10 has a simple basic shape, which may be formed, for example, rail-shaped with a U-shaped cross section, wherein the
  • U-shape away from the cylinder head 2 opens.
  • Such 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.
  • Hold-down device 10 sleeves 12 may be provided, 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 I Ia, which rest against the hold-down device 10. However, the spring tongues IIa 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 second exemplary embodiment, illustrated in FIG. 3, of a hold-down device 10 configured according to the invention has integral spring elements 11 formed thereon.
  • the spring elements 11 are formed sleeve-shaped with spring tongues IIa, which rest against the hold-down device 10 and by their resilient training to absorb the forces acting, only spring clip 1 Ib are provided in Fig. 3, which advantageously integrally with the hold-down device 10 formed 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 form, but is oriented in the second embodiment with the opening of the U-shape to the cylinder head 2. This is advisable because the spring clips 1 Ib are usefully supported on the bent legs 16 of the U-shaped hold-down device 10 or continue directly therefrom.
  • the invention is not limited to the illustrated embodiments and, for example, also applicable for hold-down devices 10 for fuel injection valves 1 for injecting fuel into the combustion chamber of a self-igniting internal combustion engine.

Landscapes

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

Abstract

La présente invention concerne un dispositif de retenue (10) qui sert à la fixation élastique de plusieurs soupapes d'injection de carburant (1) qui sont retenues dans une culasse (2) d'un moteur à combustion interne, au moyen d'éléments de rappel (11), pour permettre l'injection directe de carburant dans la chambre de combustion du moteur à combustion interne. Selon l'invention, le dispositif de retenue se présente sous la forme d'un rail qui présente des ouvertures (13) destinées à recevoir les soupapes d'injection de carburant (1).
EP06763477.4A 2005-07-15 2006-06-02 Dispositif de retenue Ceased 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 true EP1907688A1 (fr) 2008-04-09
EP1907688B1 EP1907688B1 (fr) 2018-05-16

Family

ID=36699349

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06763477.4A Ceased 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

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2643681B1 (fr) * 1989-02-27 1991-06-07 Peugeot Agencement pour le maintien et le positionnement de plusieurs injecteurs de carburant sur un moteur a combustion interne
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007009839A1 *

Also Published As

Publication number Publication date
US20090188470A1 (en) 2009-07-30
WO2007009839A1 (fr) 2007-01-25
JP2009501291A (ja) 2009-01-15
DE102005033139A1 (de) 2007-01-25
EP1907688B1 (fr) 2018-05-16

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