EP1440235B1 - Dispositif de fixation - Google Patents

Dispositif de fixation Download PDF

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Publication number
EP1440235B1
EP1440235B1 EP02774435A EP02774435A EP1440235B1 EP 1440235 B1 EP1440235 B1 EP 1440235B1 EP 02774435 A EP02774435 A EP 02774435A EP 02774435 A EP02774435 A EP 02774435A EP 1440235 B1 EP1440235 B1 EP 1440235B1
Authority
EP
European Patent Office
Prior art keywords
fastening device
injection valve
fuel
fuel injection
spring
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
EP02774435A
Other languages
German (de)
English (en)
Other versions
EP1440235A1 (fr
Inventor
Werner Berger
Martin Mueller
Andreas Glaser
Anh Tuan Hoang
Martin Buehner
Cedric Olivier
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 EP1440235A1 publication Critical patent/EP1440235A1/fr
Application granted granted Critical
Publication of EP1440235B1 publication Critical patent/EP1440235B1/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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8023—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, e.g. clips
    • 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 fastening device for fastening a fuel injection valve to a cylinder head of an internal combustion engine and for connecting the fuel injection valve to a fuel distributor line according to the preamble of claim 1.
  • a fastening device for a fuel injection valve for attachment to a suction tube in which the axial fixation of the fuel injection valve on the fuel distributor line or on a plug-in nipple by a fastener, which is designed as a U-shaped securing clip provided with two resiliently resilient legs is.
  • the securing clip engages in the assembled state by corresponding recesses of the plug-in nipple and can be latched in a recess formed as an annular groove in a connecting piece of the fuel injection valve.
  • the axial clearance between the recesses and the securing clip as well as between the annular groove and the securing clip should be kept small in order to achieve an exact fixation of the fuel injection valve without tension of the seal.
  • a disadvantage of the DE 29 26 490 C2 known fastening device is that only a limited extent holding down forces can be transmitted. In particular, it is not possible to effect a relatively uniform holding force over a certain axial length to compensate for positional tolerances.
  • the described prior art is intended for a Saugrohrhrespritzanalage and therefore offers no solution as positional tolerances can be compensated for high pressure fuel rail manifolds.
  • the DE 197 35 665 A1 discloses a fuel injection system for direct injection of fuel into a combustion chamber of an internal combustion engine, comprising at least one fuel injection valve, wherein between the fuel inlet opening of the fuel injection valve and the fuel outlet opening, a tubular intermediate piece is provided.
  • a fastening device for a fuel injection valve having the features of the preamble of claim 1 is known from US 5,501,195 known.
  • the fastening device according to the invention for a fuel injection valve with the features of independent claim 1 has the advantage that positional tolerances between fuel injector and fuel distributor line, in particular axial position tolerances can be compensated by the spring elements are axially stretched further.
  • the spring members By the spring members, the fuel injection valve is held down with a hold-down force in the cylinder head when the fuel rail is fixed to the cylinder head and pressed to the cylinder head.
  • the spring elements are stretched from their rest position by axial pressure and exert this pressure on the fuel injection valve as a hold-down force.
  • the fuel injection valve by the fastening device already during assembly with. the fuel distributor line are connected and can be removed completely at each disassembly unit of fastening device, fuel injector and fuel rail.
  • the spring elements are loaded to train and the fastening device can pull out the fuel injector from the cylinder head, as the locking connections, as well as the spring tongues in the holding transmitted to pressure and train forces.
  • omitted in the fastening device according to the invention screws or clamps for attachment to the front side of the cylinder head.
  • latching connections are formed by recesses in a portion of the spring elements, can be used in the detents of the fuel injection valve or the fuel distribution line.
  • This embodiment can engage by the radial elasticity of the spring elements and requires no further components.
  • the spring elements may have in a favorable embodiment radially outward refolding.
  • the design of a bent portion of the spring elements, the spring constants can be influenced by pressure and train.
  • the fastening device may consist of plastic injection molding.
  • the fastening device is made of spring steel and as a stamped part with subsequent bending of the mold.
  • the spring tongues may be on its side facing the retaining groove, at least in a partial area as far as axially bent, that a play-free, axially resilient jamming occurs when inserted into the retaining groove.
  • a further advantage is that the retaining groove is formed on the fuel injection valve and the latching connection to the fuel distribution line.
  • the attachment in the retaining groove requires the lower height and is Therefore, cheap to install the fuel injector.
  • Fig. 1 shows a perspective view of an embodiment of a fastening device 1 according to the invention for a fuel injection valve for attachment to a fuel rail.
  • two spring tongues 2 are formed, which between them an opening area with a allow maximum diameter d2.
  • This opening area is oriented perpendicular to an imaginary axis 3, which is identical to an axis of symmetry of the fuel injection valve, which is not shown here.
  • the spring tongues 2 have a tip distance d1, which is smaller than the distance d2.
  • the fastening device 1 can be attached to the fuel injection valve via the spring tongues 2, which are insertable into a retaining groove. It is possible to postpone the fastening device 1 laterally. In the longitudinal direction of the axis 3 then there is a frictional connection. In the present case, two spring elements 4 adjoin the spring tongues 2, which springs can spring in the direction of the axis 3 both on pressure and on tension.
  • Fig. 1 the fastening device is shown in the unloaded state in which no force acts on the spring elements 4.
  • contact sections 5 of the spring elements 4 recesses 6 are arranged, in which, for example, the fuel distribution line can engage with corresponding notches.
  • the spring elements 4 have radially with respect to the axis 3 to a folding region 7, the folds are executed in the present example rather sharp.
  • the spring tongues 2 are slightly bent.
  • Fig. 2 shows a schematic, sectional view of the embodiment of Fig. 1 in the installation position for a fuel injection valve 9, attached to a fuel distribution line 10.
  • the fuel injection valve 9 is inserted with an end portion 11 in a receiving bore 12 of the fuel distribution line 10.
  • the fastening device 1 is clipped with their recesses 6 in detents 16 on the fuel rail 10.
  • the fastening device is in the sectional plane of the line 2 and the axis 3 in Fig. 1 shown in a defined plane.
  • the spring tongues 2 with the edge portion 8, which is slightly bent, are inserted into the retaining groove 17, which is formed on the fuel injection valve 9.
  • the respective fold region 7 of the two spring elements 4 lies radially outward.
  • the parts of the spring elements 4 before and after the fold region 7 no longer lie parallel here since the fuel distributor line 10 exerts a pressure force in the direction of the flow of the fuel onto the fuel injection valve 9, which is transmitted by the fastening device 1 of the detents 16 on the retaining groove 17.
  • This holding force is the necessary hold-down force to keep the fuel injection valve on a cylinder head, not shown here, safe against the pressure of a combustion chamber. Due to the bend in the edge region 8 a play of the spring tongues 2 is prevented in the retaining groove 17, since there is a jamming.
  • the fuel injection valve 9 can be dismantled together with the fuel distribution line 10.
  • each spring element 4 is pulled over its rest point and now exerts no pressure force on the fuel injection valve 9 more. Rather, a tensile force on the retaining groove 17 to the Fuel injector 9 transmitted and the fuel injection valve 9 pulled away from a cylinder head. It can thus be dismantled together with the fuel distribution line 10.
  • the fuel distribution line 10 can be dismantled alone by previously the fastening device 1 is removed. This can be done by the contact areas 5 of the spring elements 4 are stretched so far radially outward that they can be removed from the latches 16.
  • the fastening device in total, here in the representation forward to the viewer to be pulled out of the retaining groove 17 by the spring tongues 2 spread wide enough that the distance d1 in the Fig. 1 becomes large enough to be pulled over the diameter of the retaining groove 17 in its base.
  • fastening device 1 By punching out the fastening device 1 from spring steel sheet and subsequent bending this shape fastening device 1 can be easily made and by the choice of suitable materials and large hold-down forces can be transmitted. As a result, otherwise necessary components, such as a fastening claw and screwing can be avoided.
  • Fig. 3a, 3b and 3c show in the schematic detail sections further embodiments of the fastening device 1 according to the invention in the Fig. 1 and the Fig. 2 with different folding areas compared to the folding area 7 in the Fig. 1 and 2 ,
  • the fastening device 1 is shown in each case only for one side due to the symmetry.
  • the folding area 18a is in Fig. 3a designed as a round arch.
  • Fig. 3b shows by way of example an acute-angled folding region 18b.
  • Fig. 3c finally shows a multiple refolding 18c in the region of the spring elements 4th
  • the two latter exemplary embodiments allow a relatively low spring constant.

Claims (8)

  1. Dispositif de fixation pour fixer un injecteur de carburant (9) à la fois à une culasse de moteur à combustion interne et (9) a une conduite de distribution de carburant (10),
    le dispositif de fixation (2) ayant deux languettes élastiques (2) logées dans une rainure de fixation (17) de l'injecteur (9) ou de la conduite de distribution de carburant,
    l'intervalle (d1) entre les pointes des languettes élastiques (2) étant inférieur au plus grand diamètre (d2) de la surface de l'ouverture entourée par ces languettes et les languettes (2) sont radialement élastiques par rapport à l'axe (3) de l'injecteur (9),
    et pour les languettes élastiques (2), élastiques dans la direction axiale à la fois en traction et en compression, il y a au moins deux éléments de ressort (4) poursuivant les languettes élastiques (2) qui peuvent être reliées de manière amovible par une liaison par enclipsage avec l'injecteur en regard ou la conduite de distribution en carburant (10), par une liaison par la force dans la direction axiale,
    caractérisé en ce que
    chacun au moins des deux éléments de ressort (4) a une partie repliée radialement vers l'extérieur.
  2. Dispositif de fixation selon la revendication 1,
    caractérisé en ce que
    les liaisons par enclipsage sont réalisées par des découpes (6) dans un segment (5) des éléments de ressort (4) recevant des organes d'enclipsage (16) de l'injecteur ou de la conduite de distribution de carburant (10).
  3. Dispositif de fixation selon la revendication 1,
    caractérisé en ce que
    les parties repliées correspondent à plusieurs parties repliées (18c).
  4. Dispositif de fixation selon l'une des revendications 1 à 3,
    caractérisé en ce que
    le dispositif de fixation (1) est en matière plastique injectée.
  5. Dispositif de fixation selon l'une des revendications 1 à 4,
    caractérisé en ce que
    le dispositif de fixation (1) en tôle à ressort est fabriqué comme pièce emboutie avec un cintrage de mise en forme.
  6. Dispositif de fixation selon la revendication 5,
    caractérisé en ce que
    sur leur côté tourné vers la rainure de fixation (17), dans au moins une zone partielle, les languettes élastiques (2) sont recourbées axialement de façon qu'en venant dans la rainure de fixation (17) elles réalisent un serrage axial sans jeu, élastique.
  7. Dispositif de fixation selon l'une des revendications 1 à 6,
    caractérisé par
    trois au moins éléments de ressort répartis régulièrement dans la direction radiale.
  8. Dispositif de fixation selon l'une des revendications 1 à 7,
    caractérisé en ce que
    la rainure de fixation (17) est réalisée sur l'injecteur (9) et la liaison d'enclipsage est réalisée sur la conduite de distribution de carburant (10).
EP02774435A 2001-10-24 2002-10-01 Dispositif de fixation Expired - Lifetime EP1440235B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10152421 2001-10-24
DE10152421A DE10152421A1 (de) 2001-10-24 2001-10-24 Befestigungsvorrichtung
PCT/DE2002/003715 WO2003038267A1 (fr) 2001-10-24 2002-10-01 Dispositif de fixation

Publications (2)

Publication Number Publication Date
EP1440235A1 EP1440235A1 (fr) 2004-07-28
EP1440235B1 true EP1440235B1 (fr) 2008-02-13

Family

ID=7703533

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02774435A Expired - Lifetime EP1440235B1 (fr) 2001-10-24 2002-10-01 Dispositif de fixation

Country Status (7)

Country Link
US (1) US7063075B2 (fr)
EP (1) EP1440235B1 (fr)
JP (1) JP4280632B2 (fr)
CN (1) CN1312394C (fr)
AT (1) ATE386207T1 (fr)
DE (2) DE10152421A1 (fr)
WO (1) WO2003038267A1 (fr)

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DE10239142A1 (de) * 2002-08-27 2004-04-29 Daimlerchrysler Ag Kraftstoffeinspritzvorrichtung für eine Brennkraftmaschine
DE10256668A1 (de) 2002-12-04 2004-07-29 Robert Bosch Gmbh Stützelement
DE10338715B4 (de) * 2003-08-22 2014-07-17 Robert Bosch Gmbh Ausgleichselement für ein Brennstoffeinspritzventil
DE10358912A1 (de) * 2003-12-16 2005-09-08 Robert Bosch Gmbh Brennstoffeinspritzsystem
DE10359299A1 (de) * 2003-12-17 2005-08-25 Robert Bosch Gmbh Stützelement
JP4634765B2 (ja) * 2004-09-16 2011-02-16 日産自動車株式会社 燃料噴射弁取付構造
DE102004048401A1 (de) 2004-10-01 2006-04-06 Robert Bosch Gmbh Niederhalter für eine Brennstoffeinspritzvorrichtung und Brennstoffeinspritzvorrichtung
DE102004055317A1 (de) 2004-11-16 2006-05-24 Bosch Rexroth Aktiengesellschaft Elektrische Drehfeldmaschine und Primärteil
EP2187041B1 (fr) * 2005-03-03 2015-01-28 Robert Bosch GmbH Dispositif d'injection de carburant
US20060232061A1 (en) * 2005-04-15 2006-10-19 Yasushi Fujiwara Clamp device
DE602006009926D1 (de) * 2006-08-21 2009-12-03 Continental Automotive Gmbh Injektor, Kraftstoffzulaufbecher sowie Halter
JP4558021B2 (ja) * 2007-09-06 2010-10-06 日立オートモティブシステムズ株式会社 燃料噴射弁およびその支持方法
EP2093414B1 (fr) * 2008-02-19 2011-07-20 Continental Automotive GmbH Dispositif de couplage
DE602008004428D1 (de) * 2008-02-19 2011-02-24 Continental Automotive Gmbh Kupplungsvorrichtung
EP2093412B1 (fr) * 2008-02-19 2011-01-19 Continental Automotive GmbH Dispositif de couplage
EP2093411B1 (fr) 2008-02-19 2011-01-19 Continental Automotive GmbH Dispositif de couplage
DE102008002122A1 (de) * 2008-05-30 2009-12-03 Robert Bosch Gmbh Niederhalter für eine Brennstoffeinspritzvorrichtung
EP2208883B1 (fr) * 2009-01-19 2015-07-22 Continental Automotive GmbH Dispositif de couplage
EP2388469B1 (fr) * 2010-05-18 2013-03-13 Continental Automotive GmbH Capuchon de carburant
US8469003B2 (en) * 2010-09-10 2013-06-25 Burgess • Norton Mfg. Co., Inc. Fuel injector clamp
DE102011002996A1 (de) 2011-01-21 2012-07-26 Robert Bosch Gmbh Kraftstoffeinspritzventil mit verbessertem Hochdruckanschluss
KR101199642B1 (ko) * 2011-02-25 2012-11-08 주식회사 케피코 차량용 연료레일의 연료분사기 고정구조
JP5270714B2 (ja) * 2011-04-27 2013-08-21 トヨタ自動車株式会社 燃料噴射弁用制振インシュレータ
DE102011075057A1 (de) * 2011-05-02 2012-11-08 Robert Bosch Gmbh Brennstoffverteiler und System mit einem Brennstoffeinspritzventil
DE102011082743A1 (de) * 2011-09-15 2013-03-21 Robert Bosch Gmbh Brennstoffverteiler
DE102011084704A1 (de) * 2011-10-18 2013-04-18 Robert Bosch Gmbh Ausrichtelement für ein Einspritzventil sowie Verfahren zur Herstellung eines Einspritzventils
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
DE102012221134A1 (de) * 2012-11-20 2014-05-22 Robert Bosch Gmbh Anordnung für eine Brennstoffeinspritzanlage mit einem Brennstoffeinspritzventil und einem Entkoppelelement
EP2832986B1 (fr) 2013-07-31 2016-05-25 Continental Automotive GmbH Ensemble d'injection de carburant pour moteur à combustion
EP2860388B1 (fr) * 2013-10-10 2017-07-26 Continental Automotive GmbH Ensemble d'injection de carburant pour moteur à combustion
CN104265535B (zh) * 2014-10-13 2016-07-06 浙江新柴股份有限公司 一种柴油机上喷油器安装的定位装置
KR101739694B1 (ko) 2016-06-13 2017-05-24 주식회사 현대케피코 인젝터 클립
EP3279463A1 (fr) * 2016-08-04 2018-02-07 Continental Automotive GmbH Ensemble d'injection de carburant pour un moteur à combustion interne
DE102018218711A1 (de) 2018-10-31 2020-04-30 Robert Bosch Gmbh Niederhalter für eine Brennstoffeinspritzvorrichtung
US11174825B2 (en) * 2019-02-11 2021-11-16 Caterpillar Inc. Seal configuration for fuel injector

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DE19949381A1 (de) * 1998-10-14 2000-04-20 Ford Motor Co Anordnung zur Ausrichtung eines Kraftstoffinjektors in Richtung zu einer Kraftstoffkrümmermanschette

Also Published As

Publication number Publication date
JP2005507052A (ja) 2005-03-10
DE10152421A1 (de) 2003-06-18
US20050066941A1 (en) 2005-03-31
CN1312394C (zh) 2007-04-25
JP4280632B2 (ja) 2009-06-17
WO2003038267A1 (fr) 2003-05-08
DE50211699D1 (de) 2008-03-27
ATE386207T1 (de) 2008-03-15
US7063075B2 (en) 2006-06-20
EP1440235A1 (fr) 2004-07-28
CN1478176A (zh) 2004-02-25

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