EP1129286A1 - Soupape d'injection de carburant pour moteurs a combustion interne - Google Patents

Soupape d'injection de carburant pour moteurs a combustion interne

Info

Publication number
EP1129286A1
EP1129286A1 EP00967527A EP00967527A EP1129286A1 EP 1129286 A1 EP1129286 A1 EP 1129286A1 EP 00967527 A EP00967527 A EP 00967527A EP 00967527 A EP00967527 A EP 00967527A EP 1129286 A1 EP1129286 A1 EP 1129286A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
combustion chamber
ring
valve
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
EP00967527A
Other languages
German (de)
English (en)
Other versions
EP1129286B1 (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

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
    • 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 is based on a fuel injection valve for internal combustion engines according to the preamble of claim 1.
  • a fuel injector known from published patent application DE 196 05 956 has a largely rotationally symmetrical valve body, which tapers towards the combustion chamber with the formation of an annular shoulder and thus merges into a valve body shaft which extends into the combustion chamber.
  • the valve body is axially clamped against a valve holding body by means of a clamping nut which acts on the ring shoulder.
  • the fuel injection valve is arranged in a receiving bore formed in the housing of an internal combustion engine, the inside diameter of the receiving bore decreasing toward the combustion chamber, forming a stop surface. In the installed position of the fuel injector, the clamping nut comes into contact with the stop surface of the mounting hole.
  • the fuel injection valve is pressed towards the combustion chamber into the receiving bore and thus with the clamping nut against the stop surface. Sealing to the combustion chamber is ensured by an annular disk-shaped sealing disk arranged between the stop surface and the clamping nut.
  • a sealing washer known from the published patent application DE 196 05 956 is installed in the receiving bore before the fuel injector is installed Valve body pushed and held by radial tension on the valve body.
  • the known fuel injection valves have the disadvantage that the sealing disk can remain in the receiving bore when the fuel injection valve is removed.
  • the sealing washer can only be removed with great effort, possibly with the help of special tools.
  • sealing washer may come loose and get lost during transport.
  • the reassembly of the sealing washer when equipping the internal combustion engine necessitates a further operation 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 to the clamping nut and no forces are exerted on the valve body.
  • the undercut of the outer wall of the ring shoulder is formed in a simple manner by a conical design. Accordingly, the outer 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 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 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 fitted both before and after the clamping nut is screwed onto 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 a fuel injection valve in the area of the sealing washer and the sealing washer in the installed position
  • FIG. 2 shows a cross section through an embodiment of the sealing washer before installation and a possible embodiment of the drawing tool
  • FIG. 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 an interrupted ring web.
  • the fuel injection valve has a valve body, which is arranged in a receiving bore 6, 7 of a housing 1 of the internal combustion engine.
  • the part of the valve body on the combustion chamber side is formed by a valve base body 3 which tapers towards the combustion chamber of the internal combustion engine to form an annular shoulder 18 and merges into a valve body shaft 9 which extends into the combustion chamber and at the end of which at least one injection opening 25 is arranged ,
  • a bore 2 is formed in the valve body 3, in which a piston-shaped valve member 4, which is axially movable against the closing force of a spring, is arranged.
  • the injection opening 25 is connected to a high-pressure inlet channel (not shown in the drawing) and fuel is injected into the combustion chamber.
  • the valve member 4 is moved through an outward, for Combustion chamber directed opening stroke movement which opens at least one injection opening 25.
  • the bore 2 is closed by a closing head arranged on the valve member 4, which partially emerges from the bore 2 during the opening stroke movement and thereby releases at least one injection opening.
  • the valve body 3 is surrounded by a valve body shaft 9 and supported on the annular shoulder 18.
  • zend clamping nut 10 braced in the axial direction against a valve holding body 5.
  • 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 opposing screw surfaces 19.
  • the outer surface of the ring shoulder 12 is at least approximately conical, 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 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 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.
  • the outer lateral surface of its annular web 16 Before the sealing washer 15 is installed, 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 lateral 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. 15 An alternative embodiment of the sealing disk 15 is shown in FIG.
  • a further, circumferential lower ring web 17 is formed on the outer edge of the sealing disk 15.
  • an annular recess is formed concentrically to the same on the same side of the sealing disk 15, which makes the area formed by the two annular webs 16, 17 more flexible than the annular disk-shaped central piece.
  • the lower ring web 17 protrudes beyond the central part of the sealing disk 15 on the combustion chamber side, so that when the sealing disk 15 is installed, only the lower ring web 17 comes into contact with the stop surface 8.
  • FIG. 5 shows the top view of such a sealing disk 15 with three ring openings 13, which are evenly distributed over the circumference. This makes it easier to press the ring web 16 inward during assembly into the undercut formed on the ring shoulder 12.
  • the assembly and operation of the sealing washer 15 is as follows:
  • the inner lateral surface of the ring web 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 disk 15 on the clamping nut 10.
  • the outer lateral surface of the sealing disk 15 becomes approximately cylindrical through this drawing process.
  • the ring web 16 can be deformed into the undercut of the ring shoulder 12 using 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 circumferential surface of the ring web 16.
  • the inside diameter of the semi-annular stamp corresponds to the diameter a of the ring washer 15.
  • the sealing washer 15 is made of a metal that is soft compared to the material of the clamping nut 10, preferably of copper, a copper alloy, soft iron or one
  • the sealing washer 15 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 disk 15 from the clamping nut 10 without great effort, for example with the aid of a special tool or a screwdriver. In one configuration, as shown in FIG. 3, 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 sealing disk 15 is securely connected to the clamping nut 10.
  • the function of the sealing disk 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 consists 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 other design.

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 une soupape d'injection de carburant pour moteurs à combustion interne, qui comprend un corps de soupape qui se rétrécit en direction de la chambre de combustion, comporte un gradin annulaire (12) et prend la forme d'une tige de soupape (9) pénétrant dans la chambre de combustion. Cette soupape d'injection de carburant est placée dans un alésage de réception (6, 7) dont le diamètre se réduit en direction de la chambre de combustion et qui présente une surface de butée (8). A l'état monté, le gradin annulaire (12) est pressé contre ladite surface d'appui (8), avec intercalation d'un disque d'étanchéité (15) dont le côté faisant face au corps de maintien de soupape (5) présente un rebord annulaire (16) périphérique ou au moins interrompu en un point, lequel entoure le gradin annulaire (12) et s'engage dans une contre-dépouille formée dans la surface enveloppe extérieure du gradin annulaire (12) et est ainsi assemblé avec le corps de soupape de manière imperdable.
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
DE19941930 1999-09-03
DE19941930A DE19941930A1 (de) 1999-09-03 1999-09-03 Kraftstoffeinspritzventil für Brennkraftmaschinen
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 true EP1129286A1 (fr) 2001-09-05
EP1129286B1 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
EP2379872A4 (fr) * 2009-01-16 2013-03-20 Illinois Tool Works Ensemble ressort a deux phases pour une utilisation avec un systeme d'injecteur de carburant
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

Family Cites Families (11)

* Cited by examiner, † Cited by third party
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0118386A1 *

Also Published As

Publication number Publication date
BR0007063A (pt) 2001-07-31
EP1129286B1 (fr) 2004-11-03
WO2001018386A1 (fr) 2001-03-15
DE19941930A1 (de) 2001-03-15
DE50008502D1 (de) 2004-12-09
US6745956B1 (en) 2004-06-08
JP2003508683A (ja) 2003-03-04

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