EP1721074A1 - Element de maintien - Google Patents

Element de maintien

Info

Publication number
EP1721074A1
EP1721074A1 EP05716739A EP05716739A EP1721074A1 EP 1721074 A1 EP1721074 A1 EP 1721074A1 EP 05716739 A EP05716739 A EP 05716739A EP 05716739 A EP05716739 A EP 05716739A EP 1721074 A1 EP1721074 A1 EP 1721074A1
Authority
EP
European Patent Office
Prior art keywords
support element
bracket
element according
fuel
fuel injector
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.)
Withdrawn
Application number
EP05716739A
Other languages
German (de)
English (en)
Inventor
Andreas Eckbauer
Martin Riemer
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
Priority claimed from DE102004047035.9A external-priority patent/DE102004047035B4/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1721074A1 publication Critical patent/EP1721074A1/fr
Withdrawn legal-status Critical Current

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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • 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
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/856—Mounting of fuel injection apparatus characterised by mounting injector to fuel or common rail, or vice versa

Definitions

  • the invention is based on a support element for holding down a fuel injector used in a cylinder head of an internal combustion engine according to the preamble of the main claim.
  • a disadvantage of the fastening device known from DE 29 26 490 AI is, in particular, the bracing effect of the various mounting parts on the fuel injector.
  • the force flow generated in the fuel injector leads to deformations and thus to changes in the stroke of the valve needle up to jamming and to a pressure or bending load on the housing parts, which are generally thin-walled and welded to one another at several points.
  • each fastening measure leads, for example, to an increase in the radial expansion of the fuel injection valve, and thus to an increased space requirement during installation, due to a support collar.
  • the support element according to the invention for a fuel injection valve with the characterizing features of the main claim has the advantage that the fuel distributor is supported on the fuel injection valve without radial force via the support element according to the invention and thus tension and subsequent damage to the fuel injection valve and the connection of the fuel distribution line are eliminated.
  • the support element ensures through a correspondingly designed bracket, which is penetrated by the fuel injection valve through a recess, and tabs both for transferring the hold-down force of the fuel distributor to the fuel injection valve and for a flexible fixation that compensates for tolerances and offsets.
  • the support element can be produced in a simple manner by stamping and bending from sheet metal. Manufacturing by deep drawing and punching is also possible.
  • screws or clamping claws for fastening the fuel injection valve to the end face of the cylinder head are advantageously omitted.
  • the contact surfaces on the fuel distributor and / or the fuel injector are made flat.
  • the flexible support of the fuel distributor can be further improved without additional manufacturing effort by the formation of a further elastic bracket symmetrical to the first bracket.
  • FIG. 1 shows an example of a previously common support element for a fuel injector
  • FIG. 2 shows a schematic perspective view of a first exemplary embodiment of a support element designed according to the invention
  • FIG. 3 shows a schematic bottom view of the first exemplary embodiment of a support element designed according to the invention in the assembled state shown in FIG. 2,
  • FIG. 4 shows a schematic perspective view of a fuel injection valve with an assembled support element according to FIG. 5 shows a schematic perspective view of a second exemplary embodiment of a support element designed according to the invention.
  • FIG. 6 shows a schematic perspective view of a fuel injection valve with an assembled support element according to FIG. 5 configured according to the invention.
  • FIG. 1 shows a schematic view of a previous example of a support element 3 to clarify the measures according to the invention.
  • the support element 3 is used to fix a fuel injector (not shown in FIG. 1) in a cylinder head of an internal combustion engine and to connect the fuel injector to a fuel distributor.
  • the fuel injector is e.g. B. executed as a high-pressure injection valve of a mixture-compressing, spark-ignition internal combustion engine.
  • the support element 3 In order to space the fuel injector and the fuel distributor without radial force, the support element 3 must have elasticity and stability at the same time. It consists of a bracket 8, which is supported on the one hand on a shoulder of the fuel injector and on the other hand on a shoulder of the fuel distributor. The bracket 8 is slotted in the area of an electrical connection of the fuel injector in order to facilitate assembly.
  • bracket 8 With the bracket 8 are two tabs 4 and two brackets 5 in connection and ensure resilient bracing of the fuel distributor against the fuel injector.
  • the tabs 4 are responsible for a radial clamping effect on the fuel distributor and the bracket 5 for the axial elasticity and the compensation of offsets.
  • the example shown is designed so that support the tabs 4 on the fuel rail while the brackets 5 rest on the fuel injector.
  • the support element 3 is designed in the form of a stamped and bent part and has a very complex shape in order to be able to meet all requirements in terms of elasticity and stability. Furthermore, it should be noted that the contact surfaces on the fuel distributor and on the fuel injector are relatively small due to the shape of the brackets 5 and the tabs 4 and thus only small surfaces are available for the application of force. In addition, the support element 3 has a cross section which in some areas projects beyond the outer contour of the fuel injector, which is problematic in the cramped installation conditions in the cylinder head of the internal combustion engine.
  • FIG. 2 shows a schematic, perspective illustration of an exemplary embodiment of a support element 3 designed according to the invention.
  • the support element 3 in turn consists of a bracket 8 which is attached to the fuel injector.
  • the bracket 8 is slotted. Instead of the two brackets 5 described in FIG. 1, only one bracket 5 is provided, which is penetrated by the fuel injection valve 1, as can be seen from FIG. 4.
  • the bracket 5 is due to its curved shape and its approach 6 on the bracket 8 plastically and elastically deformable under axial load, whereby an axial force in the fuel injector 1 can be initiated.
  • the shape is first produced by stamping from sheet metal and then brought into shape by rolling and bending.
  • the bracket 5 is bent radially inward so that the fuel injector 1 can be inserted through a recess 11 of the bracket 5 during assembly.
  • the contact surfaces on the fuel distributor 2 and on the fuel injection valve 1, as can be seen in FIGS. 2 and 4, are substantially larger than in the support element 3 described in FIG. 1, since for the system on
  • the bracket 5 also has a larger contact surface for supporting the
  • Fuel distributor 2 since the contact surface is actually two-dimensional and not only almost edge-shaped and limited to the thickness of the punched sheet as in the support element shown in FIG. 1.
  • Fig. 3 shows a bottom view of the embodiment of the invention designed according to the support member 3 in • mounted on the fuel injection valve 1 position.
  • Fuel distributor 2 protrudes. Only the tabs 4 and a small part of corners 10 of the bracket 8 are visible. The cramped conditions in the assembly of the fuel injection valves 1 in the cylinder head of the internal combustion engine are not additionally worsened in this way.
  • FIG. 5 shows a perspective view of a second exemplary embodiment of a support element 3 designed according to the invention.
  • the second exemplary embodiment has a further bracket 12 which is mirror-symmetrical to the bracket 5 on the support element 3. While only one of the fuel injector 1 or fuel distributor 2 components is elastically supported in the first exemplary embodiment of a support element 3 designed according to the invention in FIGS. 2 to 4, both components are elastically supported against one another in the present second exemplary embodiment, thereby further promoting the flexibility of the support ,
  • the brackets 5 and 12 can, as shown in FIG. 5, both be open, but it is also conceivable to design the bracket 5 in a closed form as in FIGS. 2 to 4 and the bracket 12 in an open form or vice versa.
  • the production of the support element 3 equipped with two brackets 5 and 12 is just as easy and inexpensive as the production of the support element 3 according to FIGS. 2 to 4, since the process steps of punching and bending remain the same.
  • FIG. 6 shows a schematic perspective illustration of a support element 3 mounted between a fuel injection valve 1 and a fuel distributor according to the second embodiment shown in FIG. 5.
  • the bracket 5 lie on the fuel distributor 2 and the bracket 12 on the fuel injector 1. Compressive forces that are exerted on the fuel injector 1 via the fuel distributor 2 can be compensated very effectively by a support element 3 designed in this way.
  • the invention is not limited to the exemplary embodiments shown and can also be used, for example, for fuel injection valves 1 for injection into the combustion chamber of a self-igniting internal combustion engine.
  • the support element 3 shown in the figures can also be mounted in the reverse installation position, so that the bracket 5 is supported on the fuel injector 1 instead of on the fuel distributor 2. All features of the invention can be combined with one another as desired.

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

L'invention concerne un élément de maintien destiné à supporter de manière réciproque une soupape d'injection de carburant (1) dans un logement de soupape, en particulier dans le logement de soupape d'une tête cylindrique (12) d'un moteur à combustion interne, et à supporter ladite soupape d'injection (1) sur un distributeur de carburant (2). Ledit élément de maintien présente une bride de fixation (8) et les éclisses (4) correspondantes ainsi qu'un arceau (5), lequel est traversé par un creux (11) de la soupape d'injection de carburant (1).
EP05716739A 2004-02-26 2005-02-18 Element de maintien Withdrawn EP1721074A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004009322 2004-02-26
DE102004047035.9A DE102004047035B4 (de) 2004-02-26 2004-09-28 Stützelement
PCT/EP2005/050722 WO2005083262A1 (fr) 2004-02-26 2005-02-18 Element de maintien

Publications (1)

Publication Number Publication Date
EP1721074A1 true EP1721074A1 (fr) 2006-11-15

Family

ID=34913334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05716739A Withdrawn EP1721074A1 (fr) 2004-02-26 2005-02-18 Element de maintien

Country Status (3)

Country Link
US (1) US7373926B2 (fr)
EP (1) EP1721074A1 (fr)
WO (1) WO2005083262A1 (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10256668A1 (de) * 2002-12-04 2004-07-29 Robert Bosch Gmbh Stützelement
DE10359299A1 (de) * 2003-12-17 2005-08-25 Robert Bosch Gmbh Stützelement
DE102004048401A1 (de) * 2004-10-01 2006-04-06 Robert Bosch Gmbh Niederhalter für eine Brennstoffeinspritzvorrichtung und Brennstoffeinspritzvorrichtung
WO2006092427A1 (fr) * 2005-03-03 2006-09-08 Robert Bosch Gmbh Dispositif d'injection de carburant
DE102008002122A1 (de) * 2008-05-30 2009-12-03 Robert Bosch Gmbh Niederhalter für eine Brennstoffeinspritzvorrichtung
US8646434B2 (en) 2010-08-09 2014-02-11 Hitachi Automotive Systems Americas Inc. Anti-rotation clip for a twist lock fuel injector
US8813722B2 (en) 2010-08-09 2014-08-26 Hitachi Automotive Products (Usa) Fuel injector holder
DE102010034411B4 (de) 2010-08-14 2018-10-11 Audi Ag Brennkraftmaschine mit Einspritzventil
EP2753820B1 (fr) * 2011-09-08 2016-10-19 Continental Automotive GmbH Ensemble d'injecteur de carburant
DE112012004986T5 (de) * 2011-11-29 2014-08-28 Piolax Inc. Anbringungsvorrichtung
JP5822271B2 (ja) * 2012-02-27 2015-11-24 株式会社ケーヒン 燃料噴射弁の支持構造
JP5822272B2 (ja) * 2012-02-27 2015-11-24 株式会社ケーヒン 燃料噴射弁の支持構造
WO2013167447A1 (fr) * 2012-05-08 2013-11-14 Continental Automotive Gmbh Dispositif d'accouplement et ensemble injecteur de carburant
JP6074793B2 (ja) * 2012-11-05 2017-02-08 株式会社ケーヒン 燃料噴射弁の支持構造
KR101768395B1 (ko) 2016-10-21 2017-08-14 주식회사 현대케피코 인젝터 클립
KR101938481B1 (ko) * 2017-06-23 2019-01-14 주식회사 현대케피코 인젝터용 클립
DE102020202949A1 (de) * 2020-03-09 2021-09-09 Robert Bosch Gesellschaft mit beschränkter Haftung Brennstoffeinspritzvorrichtung
US11873786B2 (en) * 2021-10-19 2024-01-16 Stanadyne Operating Company Llc Axisymmetric injector hold-down load ring

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11351106A (ja) * 1998-06-05 1999-12-21 Honda Motor Co Ltd 燃料噴射弁の取付け構造
WO2003006818A1 (fr) * 2001-07-09 2003-01-23 Robert Bosch Gmbh Dispositif de fixation d'une soupape d'injection de carburant a une conduite de distribution de carburant
US20040020469A1 (en) * 2001-03-16 2004-02-05 Ferdinand Reiter Fastening device for a fuel injection valve
WO2004051074A1 (fr) * 2002-12-04 2004-06-17 Robert Bosch Gmbh Element d'appui

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2908095C2 (de) * 1979-03-02 1984-02-16 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzanlage für Brennkraftmaschinen
DE2926490A1 (de) 1979-06-30 1981-02-05 Bosch Gmbh Robert Kraftstoffeinspritzanlage
DE3918410A1 (de) * 1989-06-06 1990-12-13 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung fuer brennkraftmaschinen
US4984548A (en) * 1989-11-20 1991-01-15 Sharon Manufacturing Company Fuel injector retainer clip
DE4017875C2 (de) * 1990-06-02 1999-02-04 Bosch Gmbh Robert Brennstoffeinspritzeinrichtung für Brennkraftmaschinen
US5501195A (en) * 1994-09-16 1996-03-26 Siemens Automotive Corporation Retainer arrangement for a bottom feed fuel injector
JP3765336B2 (ja) * 1996-10-15 2006-04-12 株式会社デンソー 燃料供給装置およびその製造方法
US5803052A (en) * 1997-06-27 1998-09-08 Siemens Automotive Corporation Spring clip for retaining a fuel injector in a fuel rail cup
US5970953A (en) * 1999-01-12 1999-10-26 Siemens Automotive Corporation High pressure injector clip
US6276339B1 (en) * 2000-05-02 2001-08-21 Delphi Technologies, Inc. Fuel injector spring clip assembly
US6748925B1 (en) * 2000-10-30 2004-06-15 Siemens Automotive Corporation Injector and fuel rail assembly for installation on an integrated fuel rail
DE10108467A1 (de) * 2001-02-22 2002-09-05 Bosch Gmbh Robert Befestigungsvorrichtung
DE10213585A1 (de) * 2001-03-27 2002-10-02 Denso Corp Kraftstoffzufuhrvorrichtung mit einem Herausrutschverhinderungselement
DE10163030B4 (de) * 2001-12-20 2014-10-09 Robert Bosch Gmbh Befestigungsvorrichtung
DE102004015042A1 (de) * 2004-03-26 2005-10-13 Robert Bosch Gmbh Stützelement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11351106A (ja) * 1998-06-05 1999-12-21 Honda Motor Co Ltd 燃料噴射弁の取付け構造
US20040020469A1 (en) * 2001-03-16 2004-02-05 Ferdinand Reiter Fastening device for a fuel injection valve
WO2003006818A1 (fr) * 2001-07-09 2003-01-23 Robert Bosch Gmbh Dispositif de fixation d'une soupape d'injection de carburant a une conduite de distribution de carburant
WO2004051074A1 (fr) * 2002-12-04 2004-06-17 Robert Bosch Gmbh Element d'appui

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2005083262A1 *

Also Published As

Publication number Publication date
US20070175450A1 (en) 2007-08-02
US7373926B2 (en) 2008-05-20
WO2005083262A1 (fr) 2005-09-09

Similar Documents

Publication Publication Date Title
EP1721074A1 (fr) Element de maintien
EP2189650B1 (fr) Dispositif d'injection de carburant
EP1797315B1 (fr) Systeme d'assujettissement pour dispositif d'injection de carburant
EP1706626B1 (fr) Element d'appui
EP1364123B1 (fr) Dispositif de fixation
EP1366285B1 (fr) Dispositif de fixation
EP2841759B1 (fr) Installation d'injection carburant haute pression
EP1440235A1 (fr) Dispositif de fixation
DE10163030B4 (de) Befestigungsvorrichtung
EP1570171B1 (fr) Element d'appui
DE102004015042A1 (de) Stützelement
WO2003006818A1 (fr) Dispositif de fixation d'une soupape d'injection de carburant a une conduite de distribution de carburant
DE102004047035B4 (de) Stützelement

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR IT

17P Request for examination filed

Effective date: 20060926

DAX Request for extension of the european patent (deleted)
RBV Designated contracting states (corrected)

Designated state(s): DE FR IT

17Q First examination report despatched

Effective date: 20081106

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20181112

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20190323