EP1129286B1 - Soupape d'injection de carburant pour moteurs a combustion interne - Google Patents

Soupape d'injection de carburant pour moteurs a combustion interne Download PDF

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Publication number
EP1129286B1
EP1129286B1 EP00967527A EP00967527A EP1129286B1 EP 1129286 B1 EP1129286 B1 EP 1129286B1 EP 00967527 A EP00967527 A EP 00967527A EP 00967527 A EP00967527 A EP 00967527A EP 1129286 B1 EP1129286 B1 EP 1129286B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
sealing washer
combustion chamber
annular
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
EP00967527A
Other languages
German (de)
English (en)
Other versions
EP1129286A1 (fr
Inventor
Dietmar Bantle
Reiner Kaess
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 EP1129286A1 publication Critical patent/EP1129286A1/fr
Application granted granted Critical
Publication of EP1129286B1 publication Critical patent/EP1129286B1/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
    • F02M61/14—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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/858—Mounting of fuel injection apparatus sealing arrangements between injector and engine

Definitions

  • the invention relates to a fuel injection valve for Internal combustion engines according to the preamble of claim 1 out.
  • a fuel injection valve for Internal combustion engines according to the preamble of claim 1 out.
  • Such a from the published patent application DE 196 05 956 known fuel injection valve has a largely rotationally symmetrical valve body, which itself tapering towards the combustion chamber to form an annular shoulder and thus changes into a valve body that extends into the Combustion chamber protrudes.
  • the valve body is by means of a Clamping nut, which engages the ring shoulder, axially against clamped a valve holding body.
  • the fuel injector is formed in a housing of an internal combustion engine Receiving hole arranged, the inside diameter the receiving hole to form a stop surface reduced towards the combustion chamber. With the Fuel injection valve comes the clamping nut on the stop surface the mounting hole to the system.
  • the jig becomes the fuel injector towards the combustion chamber into the mounting hole and thus with the Clamping nut pressed against the stop surface.
  • the seal to the combustion chamber through a between the stop surface and clamping nut arranged washer-shaped sealing washer guaranteed.
  • One from the published patent application DE 196 05 956 known sealing washer is installed before Fuel injection valve in the receiving hole on the Valve body pushed and by a radial bracing held on the valve body.
  • the sealing washer When removing the fuel injector from the location hole and subsequent reassembly, the sealing washer be exchanged for a secure seal against to ensure the combustion chamber. It occurs in the known Fuel injectors have the disadvantage that the sealing washer when dismantling the fuel injector can remain in the mounting hole. The Sealing washer can only be removed from there with great effort with the help of special tools.
  • the known sealing washers continue to have the Disadvantage that the sealing washer during transportation loosens and gets lost.
  • the reassembly of the sealing washer the assembly of the internal combustion engine makes another one Operation necessary and causes additional costs.
  • the fuel injection valve for internal combustion engines according to the invention with the characterizing features of claim 1 has the advantage that the sealing washer is captively connected and no forces are exerted on the valve body.
  • the undercut of the outer wall of the ring shoulder is easily formed by a conical configuration.
  • the outer circumferential surface of the sealing washer is also at least approximately conical in the non-installed state, so that after the caulking of the ring land in the undercut of the ring shoulder, the outer circumferential surface of the sealing washer is approximately cylindrical.
  • the cone angle is 4 to 10 degrees, preferably about 5 degrees, both for the ring shoulder and for the sealing washer.
  • a new sealing washer must be placed on the ring shoulder of the clamping nut and caulked against it with a pulling tool.
  • a pulling tool may not be available in a motor vehicle workshop.
  • a further circumferential lower ring web is therefore formed on the side of the sealing disk facing the combustion chamber, which is essentially opposite the first ring web facing away from the combustion chamber.
  • the sealing washer When dismantling again, the sealing washer is removed from the mounting hole with the fuel injector, as with assembly using a pulling tool.
  • the sealing washer has a smaller diameter than the clamping nut. This makes it possible to reach over the sealing washer with a screwing tool, for example a screw nut, and thus screw the clamping nut against the valve holding body.
  • the sealing washer can thus be installed both before and after the clamping nut is screwed to the valve holding body.
  • the sealing washer is made according to claim 13 from a soft metal compared to the material of the valve body, so that permanent deformation is possible without much effort even at room temperature. Copper, a copper alloy, soft iron or an aluminum alloy are suitable for this purpose.
  • FIG. 1 shows a section through Fuel injection valve in the area of the sealing washer and the sealing washer in the installed position
  • Figure 2 shows a cross section by designing the sealing washer before Installation and a possible design of the drawing tool
  • 3 shows a further embodiment of the sealing washer
  • FIG. 4 a cross section through the clamping nut along the line IV-IV of Figure 1
  • Figure 5 is a plan view of a sealing washer with interrupted ring bridge.
  • the fuel injection valve has a valve body on the in a receiving hole 6.7 of a housing 1 of the internal combustion engine is arranged.
  • the combustion chamber side Part of the valve body forms a valve base body 3, which forms an annular shoulder 18 to the combustion chamber the internal combustion engine tapers and into a valve body 9 passes, which extends into the combustion chamber and on the end of which is arranged at least one injection opening 25 is.
  • a bore 2 is formed in the valve body 3, in which an axially movable against the closing force of a spring piston-shaped valve member 4 is arranged.
  • the injection opening 25 with a high-pressure inlet channel, not shown in the drawing connected and fuel is injected into the combustion chamber.
  • the valve member 4 by an outward, towards the combustion chamber Opening stroke movement the at least one injection opening 25 controls.
  • the bore 2 is through a on the valve member 4 arranged closing head closed at the opening stroke movement partially emerges from the bore 2 and thereby releases at least one injection opening.
  • the valve body 3 is braced in the axial direction against a valve holding body 5 by a clamping nut 10 surrounding the valve body shaft 9 and supported on the annular shoulder 18.
  • the clamping nut 10 has a conventional hexagonal profile 19 on its outer surface.
  • FIG. 4 shows a cross section through the clamping nut 10 and the position of the hexagonal profile 19.
  • a ring shoulder 12 is formed on the end face of the clamping nut 10 on the combustion chamber side, which has a smaller diameter d1 than the distance d2 of the opposite screw surfaces 19.
  • the outer surface of the ring shoulder 12 is at least approximately conical, with the tip of the cone forming the conical surface from the combustion chamber points away.
  • an undercut is formed on the ring shoulder 12, the cone angle ⁇ of the ring shoulder 12 being approximately 4 to 10 degrees, preferably approximately 5 degrees.
  • the receiving bore 6, 7 of the fuel injection valve in the housing 1 of the internal combustion engine tapers towards the combustion chamber. Due to the transition from the larger diameter section 6 of the receiving bore 6,7 to the smaller diameter section 7, a stop surface 8 is formed on the inner wall of the receiving bore 6,7. In the installed position of the fuel injection valve, the end of the clamping nut 10 facing the combustion chamber comes to rest against the stop surface 8 with the interposition of a sealing washer 15.
  • the sealing washer 15 ensures that the combustion chamber is sealed off from section 6 of the receiving bore 6, 7, which has a larger diameter.
  • FIG. 2 shows a longitudinal section through a sealing washer 15 according to the invention before installation.
  • the sealing disk 15 is designed as an annular disk, the inside diameter of which is larger than the outside diameter of the valve body shaft 9.
  • An annular web 16 is formed on the end face of the sealing disk 15 facing away from the combustion chamber, the height of the annular web 16 corresponding approximately to the height of the ring shoulder 12 of the clamping nut 10.
  • the inner circumferential surface of the ring web 16 is at least approximately cylindrical, and the inner diameter of the ring web 16 is so large that it can be pushed over the ring shoulder 12 formed on the clamping nut 10.
  • at least the outer lateral surface of its annular web 16 has an at least approximately conical shape, the outer diameter of the sealing washer 15 increasing away from the combustion chamber.
  • the cone angle ⁇ of the outer circumferential surface of the sealing disk 15 is between 4 and 10 degrees, preferably about 5 degrees, and corresponds at least approximately to the cone angle ⁇ of the ring shoulder 12.
  • FIG. 3 shows an alternative embodiment of the sealing washer 15 shown.
  • On the valve holder body 5 facing away Side is on the outer edge of the sealing washer 15 further, circumferential lower ring web 17 is formed. With a smaller diameter than the lower ring web 17 concentric to this on the same side of the sealing washer 15 an annular recess is formed which through the two annular webs 16, 17 formed area opposite the annular disk-shaped middle piece designed more flexible.
  • the Lower ring web 17 projects over the middle on the combustion chamber side Part of the sealing washer 15 so that when installing the Sealing disc 15 initially only the lower ring web 17 on the Stop surface 8 comes to rest.
  • Figure 5 shows the top view of such Sealing disc 15 with three ring openings 13 that are even are distributed over the scope. This makes it easier to the ring web 16 during assembly inwards on the Ring heel 12 to press-formed undercut.
  • the assembly and operation of the sealing washer 15 is as follows: In the non-installed state, the inner lateral surface of the ring land 16 is cylindrical, while the outer lateral surfaces on the sealing disk 15 have a conical shape.
  • a drawing tool 30 which is shown schematically in FIG. 2, is pulled axially over the outer lateral surface, thereby caulking it inwards.
  • the ring web 16 engages in the undercut on the lateral surface of the ring shoulder 12 and thus ensures a fixation in the axial direction of the sealing washer 15 on the clamping nut 10.
  • the outer lateral surface of the sealing washer 15 becomes approximately cylindrical by this drawing process.
  • the deformation of the ring web 16 into the undercut of the ring shoulder 12 can also be carried out with a tool in which two semi-ring-shaped punches act on the ring web 16 from the outside and caulk inward by moving towards one another towards the outer lateral surface of the ring web 16.
  • the inside diameter of the semi-annular stamp corresponds to the diameter a of the ring disk 15.
  • the sealing disk 15 is made of a metal which is soft in comparison with the material of the clamping nut 10, preferably of copper, a copper alloy, soft iron or an aluminum alloy. As a result, permanent, plastic deformation of the sealing disk 15 by the drawing or pressing process is possible even at room temperature. If the fuel injector is removed and then reinstalled, the sealing washer 15 must be replaced. Due to the small depth of the undercut on the ring shoulder 12, it is possible to detach the sealing washer 15 from the clamping nut 10 without great effort, for example with the aid of a special tool or a screwdriver.
  • the sealing washer 15 is brought into arrangement over the ring shoulder 12 during assembly.
  • the fuel injection valve is then inserted into the receiving bore 6, 7 and the clamping nut 10 is braced against the contact surface 8.
  • the lower annular web 17 of the sealing disk 15 is pressed toward the valve holding body 5 and thereby presses the annular web 16 inwards into the undercut formed on the ring shoulder 12.
  • the direction of movement of the ring webs 16, 17 is indicated in FIG. 3 by arrows.
  • the function of the sealing washer 15 in the specified manner is also ensured if the outer lateral surface of the ring shoulder 12 does not have a conical shape, but an undercut of different design. Since the sealing washer 15 is made of a metal that is soft in comparison to the material of the clamping nut 10, it can also engage in a form-fitting manner in undercuts of a different design.

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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 (13)

  1. Injecteur de carburant pour moteurs à combustion interne, comprenant un corps de soupape présentant un corps de base de soupape (3), un corps de maintien de soupape (5) et un écrou de serrage (10), le corps de base de soupape (3) se rétrécissant en direction de la chambre de combustion et étant serré contre le corps de maintien de soupape (5) par l'écrou de serrage (10) passant au-dessus du corps de base de soupape (3), l'injecteur de carburant étant disposé dans un alésage de logement (5, 7) d'un moteur à combustion interne, dont la paroi intérieure de l'alésage de logement (6, 7) comporte une surface de butée (8) formée par une réduction du diamètre en direction de la chambre de combustion, et contre laquelle vient s'appliquer par l'intermédiaire d'une rondelle d'étanchéité (15) un décrochement annulaire (12) formé à la surface d'enveloppe extérieure du corps de soupape par une réduction de section transversale,
    caractérisé en ce que
    la rondelle d'étanchéité (15), sur la face frontale opposée à la chambre de combustion, présente une nervure annulaire (16) s'étendant au moins sur une partie de la périphérie et qui à l'état monté s'engage dans une contre-dépouille formée sur la surface enveloppe du décrochement annulaire (12) du corps de soupape.
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le décrochement annulaire (12) est formé du côté de l'écrou de serrage (10) en regard de la chambre de combustion.
  3. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    pour former la contre-dépouille la surface enveloppe extérieure du décrochement annulaire (12) présente une forme sensiblement conique, le diamètre extérieur du décrochement annulaire (12) se réduisant à partir de la chambre de combustion.
  4. Injecteur de carburant selon la revendication 1,
    caractérisé en ce qu'
    à l'état monté la surface d'enveloppe intérieure de la nervure annulaire (16) présente une forme sensiblement conique, le diamètre intérieur de la nervure annulaire (16) se réduisant à partir de la chambre de combustion.
  5. Injecteur de carburant selon la revendication 3,
    caractérisé en ce que
    l'angle de cône (β) de la surface extérieure du décrochement annulaire (12) est de 4 à 10 degrés, de préférence de 5 degrés environ.
  6. Injecteur de carburant selon la revendication 1,
    caractérisé en ce qu'
    à l'état non monté de la rondelle d'étanchéité (15) la nervure annulaire (16) présente une surface enveloppe intérieure de forme sensiblement cylindrique.
  7. Injecteur de carburant selon la revendication 1,
    caractérisé en ce qu'
    à l'état non monté la rondelle d'étanchéité (15) présente une surface enveloppe extérieure sensiblement conique, le diamètre extérieur de la rondelle d'étanchéité (15) s'agrandissant à partir de la chambre de combustion.
  8. Injecteur de carburant selon la revendication 7,
    caractérisé en ce que
    l'angle de cône (α) de la surface enveloppe extérieure de la rondelle d'étanchéité (15) est de 4 à 10 degrés, de préférence de 5 degrés environ.
  9. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la nervure annulaire (16), à son extrémité opposée à la chambre de combustion, présente une épaisseur plus importante qu'à son extrémité en regard de la chambre de combustion.
  10. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    sur la face frontale de la rondelle d'étanchéité (15) en regard de la chambre de combustion une nervure annulaire (17) inférieure circulaire est formée, qui lors du serrage du décrochement annulaire (12) est pressée contre la surface de butée (8) en direction du corps de maintien de soupape (5) et pousse ainsi la nervure annulaire (16) dans la contre-dépouille sur le décrochement annulaire (12).
  11. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la nervure annulaire (16) s'engage par complémentarité de formes dans la contre-dépouille formée sur le décrochement annulaire (12).
  12. Injecteur de carburant selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le diamètre extérieur (a) de la rondelle d'étanchéité (15) est inférieur à la distance (d) des surfaces filetées (19) de l'écrou de serrage (10) situées en regard.
  13. Injecteur de carburant selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la rondelle d'étanchéité (15) est réalisée à partir d'un matériau doux par rapport au matériau du corps de soupape, de préférence en cuivre, un alliage de cuivre, fer doux ou un alliage d'aluminium.
EP00967527A 1999-09-03 2000-08-18 Soupape d'injection de carburant pour moteurs a combustion interne Expired - Lifetime EP1129286B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19941930A DE19941930A1 (de) 1999-09-03 1999-09-03 Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19941930 1999-09-03
PCT/DE2000/002816 WO2001018386A1 (fr) 1999-09-03 2000-08-18 Soupape d'injection de carburant pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP1129286A1 EP1129286A1 (fr) 2001-09-05
EP1129286B1 true EP1129286B1 (fr) 2004-11-03

Family

ID=7920605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00967527A Expired - Lifetime EP1129286B1 (fr) 1999-09-03 2000-08-18 Soupape d'injection de carburant pour moteurs a combustion interne

Country Status (6)

Country Link
US (1) US6745956B1 (fr)
EP (1) EP1129286B1 (fr)
JP (1) JP2003508683A (fr)
BR (1) BR0007063A (fr)
DE (2) DE19941930A1 (fr)
WO (1) WO2001018386A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19921242C1 (de) * 1999-05-07 2000-10-26 Siemens Ag Verfahren zum Positionieren des Stellantriebs in einem Kraftstoffinjektor und Vorrichtung zur Durchführung des Verfahrens
DE10108194A1 (de) * 2001-02-21 2002-08-29 Bosch Gmbh Robert Dichtvorrichtung für ein Brennstoffeinspritzventil
FR2851791B1 (fr) * 2003-02-28 2007-02-23 Renault Sa Joint pour injecteur a fort coefficient d'etancheite
DE10338715B4 (de) * 2003-08-22 2014-07-17 Robert Bosch Gmbh Ausgleichselement für ein Brennstoffeinspritzventil
DE10358913A1 (de) * 2003-12-16 2005-09-01 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004049277A1 (de) * 2004-10-09 2006-04-13 Robert Bosch Gmbh Dämpfungselement für ein Brennstoffeinspritzventil
FR2893364A1 (fr) * 2005-11-15 2007-05-18 Renault Sas Injecteur de carburant dans un moteur diesel et moteur diesel pourvu de tels injecteurs
DE102007011316A1 (de) * 2007-03-08 2008-09-11 Robert Bosch Gmbh Abdichtelemente für Kraftstoffinjektoren
US7513242B2 (en) * 2007-05-03 2009-04-07 Cummins Inc. Fuel injector assembly with injector seal retention
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
US20090235898A1 (en) * 2008-03-19 2009-09-24 Short Jason C Fuel injector isolator
KR101637394B1 (ko) * 2009-01-16 2016-07-07 일리노이즈 툴 워크스 인코포레이티드 연료 분사 장치에 사용하기 위한 이중상 스프링 조립체
DE102009000285A1 (de) * 2009-01-19 2010-07-22 Robert Bosch Gmbh Kraftstoff-Injektor sowie Brennkraftmaschine mit Kraftstoff-Injektor
FR2949247B1 (fr) * 2009-08-24 2011-09-16 Renault Sa Systeme de montage d'un dispositif d'injection a aiguille resonnante.
DE102009055362A1 (de) * 2009-12-29 2011-06-30 Robert Bosch GmbH, 70469 Einspritzventil für ein Fluid
DE102010024140A1 (de) * 2010-06-17 2011-12-22 Continental Automotive Gmbh Dämpfungselement für eine Anordnung aus einem Zylinderkopf einer Brennkraftmaschine und einem Einspritzventil

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Publication number Priority date Publication date Assignee Title
GB1262164A (en) 1969-06-07 1972-02-02 Gkn Floform Ltd Fuel injector sleeve for a diesel engine
US4246877A (en) * 1979-07-27 1981-01-27 General Motors Corporation Notched injector hold-down clamp
CA1213803A (fr) * 1983-04-27 1986-11-12 Honda Giken Kogyo Kabushiki Kaisha (Also Trading As Honda Motor Co., Ltd .) Systeme d'injection de carburant
US4528959A (en) * 1984-01-23 1985-07-16 Deere & Company Seal for an internal combustion engine
US5070845A (en) * 1989-05-22 1991-12-10 General Motors Corporation Fuel injection nozzle
US5044340A (en) * 1990-01-30 1991-09-03 Siemens Automotive L.P. Fuel injectors having adapter grommet
FR2659115B1 (fr) * 1990-03-02 1992-05-15 Procal Joint d'etancheite pour injecteur de moteur a combustion interne.
US5247918A (en) * 1992-09-17 1993-09-28 Siemens Automotive L.P. Sealing a direct injection fuel injector to a combustion chamber
JPH08200182A (ja) * 1995-01-25 1996-08-06 Zexel Corp 電磁式燃料噴射弁およびその取付け構造
DE19602615A1 (de) 1996-01-25 1997-07-31 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19605956A1 (de) 1996-02-17 1997-08-21 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen

Also Published As

Publication number Publication date
WO2001018386A1 (fr) 2001-03-15
DE19941930A1 (de) 2001-03-15
US6745956B1 (en) 2004-06-08
JP2003508683A (ja) 2003-03-04
BR0007063A (pt) 2001-07-31
DE50008502D1 (de) 2004-12-09
EP1129286A1 (fr) 2001-09-05

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