EP1366286B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1366286B1
EP1366286B1 EP02721981A EP02721981A EP1366286B1 EP 1366286 B1 EP1366286 B1 EP 1366286B1 EP 02721981 A EP02721981 A EP 02721981A EP 02721981 A EP02721981 A EP 02721981A EP 1366286 B1 EP1366286 B1 EP 1366286B1
Authority
EP
European Patent Office
Prior art keywords
sealing ring
fuel injection
injection valve
valve according
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.)
Expired - Lifetime
Application number
EP02721981A
Other languages
German (de)
English (en)
Other versions
EP1366286A1 (fr
Inventor
Ferdinand Reiter
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 EP1366286A1 publication Critical patent/EP1366286A1/fr
Application granted granted Critical
Publication of EP1366286B1 publication Critical patent/EP1366286B1/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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • 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 according to the preamble of claim 1.
  • a electromagnetic fuel injection valve and one for suitable attachment structure known, with which for a Internal combustion engine with a cylinder injection system the Requirements for the sealing effect, the thermal Resistance and pressure resistance can be met. Special Care is taken to seal the area in directed in the immediate vicinity of the cylinder, in the attached the electromagnetic fuel injection valve is, as well as on a more distant area.
  • a first Sealing section with a first sealing ring as corrugated bottom ring is executed, close in one place on the cylinder and between the fuel injector and the cylinder head is located.
  • a second one Sealing section with a second sealing ring the also executed as a corrugated washer, on positioned in a position farther from the cylinder is considered the first sealing section.
  • a disadvantage of the known from DE 196 00 403 A1 Fuel injection valve is in particular the high Production costs for the sealing rings.
  • high Production costs for example, in the manufacture of the sealing rings silver-plated INCONEL or Teflon-coated Materials.
  • a fuel injection valve is already known, the Injection of fuel into a combustion chamber of an internal combustion engine is used.
  • the Fuel injector has a nozzle body as part of a valve housing, the its outer circumference is stepped and thereby in a step area one Sealing ring receives, which seals the fuel injection valve against a housing.
  • the Sealing ring is U-shaped with its open side to the central axis of the sealing ring out designed directed and profiled radially outwardly convex curved.
  • an additional spring element In the open Side of the sealing ring is inserted an additional spring element, the ⁇ -shaped is executed and with its open side opposite the sealing ring training is shaped.
  • the spring element inside the sealing ring ensures that the sealing ring between the housing and the fuel injection valve is braced.
  • the Design of this seal is alone because of the multiple parts of the arrangement relatively complex and difficult to assemble.
  • a sealing ring is already known, in which ends of the Overlap sealing ring.
  • the sealing ring is between two u.a. Oil leading Housing components of an automatic transmission used for a motor vehicle. Both components to be sealed is neither a fuel injector nor around a cylinder head of an internal combustion engine.
  • the sealing ring has paraxial extending, vertical plane radial boundary surfaces, of which the radial outer surface rests against one of the housing components.
  • the axial Boundary surfaces of the solid and convex cross-section sealing ring arched trained to each other in a relative movement of the housing components a certain "rolling" of the sealing ring on the radially extending boundary sides to allow a receiving groove.
  • the fuel injection valve according to the invention with the Features of claim 1 has In contrast, the advantage that under a variable Radius of curvature shaped sealing ring cost-effective from a Copper-tin alloy can be produced, reusable as well easy to install.
  • a particular advantage is that the sealing ring a Has overlap area, which by a detent of the Ends of the sealing ring in corresponding recesses one achieves space-saving and flexible shape of the sealing ring.
  • the sealing ring inside and outside either under the same or under different Curvature radii be arched, creating a uniform Thickness of the sealing ring or one towards the edges tapered cross section can be achieved.
  • the fuel injection valve 1 is in the form of a Fuel injection valve for fuel injection systems of mixture-compacting, externally ignited Internal combustion engine running.
  • the Fuel injector 1 is particularly suitable for direct injection of fuel into one illustrated combustion chamber of an internal combustion engine.
  • the fuel injection valve 1 consists of a Nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is in operative connection with a Valve closing body 4, with one on one Valve seat body 5 arranged valve seat surface 6 to a Tight fit together.
  • a Valve closing body 4 with one on one Valve seat body 5 arranged valve seat surface 6 to a Tight fit together.
  • the fuel injection valve 1 is it in the exemplary embodiment to an inward opening fuel injection valve 1, which via a Spray opening 7 has.
  • the nozzle body 2 is by a seal 8 against a Pole 9 of a magnetic coil 10 and by a sealing ring 34 against the in Fig. 1 not shown Cylinder head of the internal combustion engine sealed.
  • a sealing ring 34 against the in Fig. 1 not shown Cylinder head of the internal combustion engine sealed.
  • the Sealing ring 34 is according to the invention of a convex curved, at two ends 35 overlapping ring by punching and Rolls made of profiled strip material.
  • a Detailed explanation of the sealing ring 34 is the Description of Figs. 2 to 4 can be seen.
  • the magnetic coil 10 is encapsulated in a coil housing 11 and wound on a bobbin 12, which on a Inner pole 13 of the solenoid coil 10 is applied.
  • the inner pole 13 and the outer pole 9 are separated by a gap 26 separated and are based on a connecting member 29th from.
  • the solenoid 10 is connected via a line 19 of a via an electrical plug-in contact 17 can be fed electrical current.
  • the plug contact 17 is of a Plastic casing 18 surrounded, the inner pole 13th can be injected.
  • the valve needle 3 is in a valve needle guide fourteenth guided, which is designed disk-shaped. to Stroke adjustment is a paired shim 15.
  • An the other side of the dial 15 is a Anchor 20. This is about a first flange 21st non-positively connected to the valve needle 3 in conjunction, which by a weld 22 with the first flange 21 connected is.
  • On the first flange 21 is supported Return spring 23 from which in the present design of Fuel injection valve 1 by a sleeve 24 Bias is brought.
  • a second flange 31st Downstream of the armature 20 is a second flange 31st arranged, which serves as a lower anchor stop. He is over a weld 33 frictionally with the valve needle. 3 connected. Between the armature 20 and the second flange 31 is an elastic intermediate ring 32 for damping Anchor bouncers when closing the fuel injector 1 arranged.
  • the armature 20 and the Valve seat body 5 extend fuel channels 30a to 30c, the fuel, which has a central Fuel supply 16 supplied and through a filter element 25th is filtered, lead to the spray opening 7.
  • the Fuel injection valve 1 is opposed by a seal 28 sealed a distribution line not shown.
  • the armature 20 drops sufficient reduction of the magnetic field by the pressure of the Return spring 23 on the first flange 21 from the inner pole thirteenth from, causing the valve needle 3 against the stroke direction emotional. As a result, the valve closing body 4 is placed on the Valve seat surface 6, and the fuel injection valve. 1 will be closed. The armature 20 sits on the through the second flange 31 formed anchor stop.
  • Fig. 2 shows in an excerpted sectional view of the in Fig. 1 with II designated section of the Inventively designed fuel injection valve. 1
  • Matching components are in all figures with provided matching reference numerals.
  • a part the cylinder head 36 of the internal combustion engine a part the cylinder head 36 of the internal combustion engine.
  • the Sealing ring 34 is located in a groove-like recess 40 of the Nozzle body 2, that he the fuel injection valve 1 against seals the cylinder head 36 of the engine.
  • the Seal 34 stands under a slight Pressing force, the above-mentioned convex Radius of curvature of the sealing ring 34 slightly flattened, thereby the sealing effect arises.
  • the sealing ring 34 is with outer edges 41 in the circumferential recess 40th be spread.
  • the production of the sealing ring 34 is preferably carried out by Punching out of profiled strip material and subsequent Roll.
  • the sealing ring 34 thus formed has two ends 35 which are shaped so that they overlap axially and mesh in the circumferential direction. A possible form of Overlap is apparent from Fig. 4.
  • the sealing ring 34 is preferably made of a copper-tin alloy or made of stainless steel.
  • the material is also characterized by good corrosion resistance and good sliding properties.
  • the former is indispensable for a long life of the sealing ring, the latter facilitates in particular the assembly and disassembly of the Fuel injection valve 1, without that the sealing ring 34th must be renewed each time, as with conventional Teflon seals is the case.
  • the assembly of the sealing ring 34 requires no special Tool, because of the spring characteristics a simple Sliding on the nozzle body 2 and following Snap into the recess 40 is possible. This is going through allows the overlapping of the ends 35 of the sealing ring 34, by the sealing ring 34 is variable in diameter.
  • the illustrated in Fig. 2 first embodiment of the Inventively designed sealing ring 34 has a same radius of curvature for an inside 38 as for an outer side 39 of the sealing ring 34. This means that the material of the sealing ring 34 in all places evenly is thick.
  • Fig. 3 shows in a schematic Cutout illustrated second embodiment of a Inventively designed fuel injection valve. 1 a variable thickness of the sealing ring 34. This takes the Thickness of the material towards the edges 41 of the sealing ring 34 resulting in a larger radius of curvature of the inside 38 is achieved with respect to the outside 39.
  • the way Resulting form is in this respect advantageous, as the Bearing surface in the recess 40 relative to the first Embodiment is lower and thereby on the one hand the Assembly simplified and on the other hand, the sealing effect is improved.
  • FIG. 4 shows a schematic view of a sealing ring 34 according to FIG. 2 or FIG. 3 in the region of the overlap of the Ends 35.
  • the sealing ring 34 is rotated by 90 ° compared to the views in FIGS. 2 and 3 shown.
  • the sealing ring 34 As already mentioned above, an overlap area on, in which the ends 35 of the sealing ring 34th mesh.
  • the overlap is characterized by an axial detent reached.
  • recesses 42 which are the For example, halve the axial height of the sealing ring 34.
  • At the Rolling of the sealing ring 34 is then one end 35 in the opposite recess 42 is inserted so that a stepped axial detent is achieved.
  • sealing rings 34 are the same Size in different sized holes 3'7 used.
  • the invention is not limited to those shown Embodiments limited and for others Cross-sectional shapes of sealing rings 34 and for any Designs of fuel injection valves 1, for example for fuel injectors 1 with connection to a Intake manifold or a common rail system, applicable.

Claims (8)

  1. Injecteur de carburant (1), notamment pour une injection directe de carburant dans la chambre de combustion d'un moteur à combustion interne à allumage commandé et à mélange comprimé, comprenant un boítier de soupape formé d'un corps de buse (2) et une bague d'étanchéité (34) présentant un axe central et rendant étanche l'injecteur de carburant (1) par rapport à une culasse (36) du moteur à combustion interne, cette bague d'étanchéité ayant radialement un profil courbé convexe vers l'extérieur,
    caractérisé en ce que
    la bague d'étanchéité (34) comporte deux extrémités (35) qui s'étendent l'une par rapport à l'autre dans la direction périphérique et se chevauchent axialement de manière étagée.
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    chacune des extrémités (35) de la bague d'étanchéité (34) peut s'engager dans une découpe (42) de l'extrémité (35) opposée.
  3. Injecteur de carburant selon la revendication 1 ou 2,
    caractérisé en ce qu'
    un rayon de courbure de la bague d'étanchéité (34) correspond au rayon de perçage d'un trou (37) pratiqué dans la culasse (36).
  4. Injecteur de carburant selon l'une des revendications 1 à 3,
    caractérisé en ce que
    la bague d'étanchéité (34) est composée d'un alliage cuivre-zinc.
  5. Injecteur de carburant selon l'une des revendications 1 à 4,
    caractérisé en ce que
    la bague d'étanchéité (34) est disposée dans un évidement (40) en forme de rainure du corps de buse (2).
  6. Injecteur de carburant selon la revendication 5,
    caractérisé en ce que
    la bague d'étanchéité (34) présente des arêtes extérieures (41) qui la délimitent axialement et s'appuient sur des faces de délimitation de l'évidement (40) qui s'étendent radialement.
  7. Injecteur de carburant selon l'une des revendications 1 à 6,
    caractérisé en ce que
    la bague d'étanchéité (34) présente le même rayon de courbure sur sa face intérieure (38) et sur sa face extérieure (39).
  8. Injecteur de carburant selon l'une des revendications 1 à 6,
    caractérisé en ce que
    la bague d'étanchéité (34) présente, sur sa face intérieure (38), un rayon de courbure supérieur à celui de sa face extérieure (39).
EP02721981A 2001-02-28 2002-02-27 Soupape d'injection de carburant Expired - Lifetime EP1366286B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10109407A DE10109407A1 (de) 2001-02-28 2001-02-28 Brennstoffeinspritzventil
DE10109407 2001-02-28
PCT/DE2002/000694 WO2002068814A1 (fr) 2001-02-28 2002-02-27 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1366286A1 EP1366286A1 (fr) 2003-12-03
EP1366286B1 true EP1366286B1 (fr) 2005-12-21

Family

ID=7675650

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02721981A Expired - Lifetime EP1366286B1 (fr) 2001-02-28 2002-02-27 Soupape d'injection de carburant

Country Status (7)

Country Link
US (1) US6921033B2 (fr)
EP (1) EP1366286B1 (fr)
JP (1) JP2004518862A (fr)
CN (1) CN1457392A (fr)
CZ (1) CZ20023491A3 (fr)
DE (2) DE10109407A1 (fr)
WO (1) WO2002068814A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10321163B4 (de) * 2003-05-12 2017-01-05 Robert Bosch Gmbh Verfahren zum Anbringen eines metallischen Dichtelements an einem Grundkörper eines Brennstoffeinspritzventils, sowie Brennstoffeinspritzventil
DE10337892A1 (de) 2003-08-18 2005-03-17 Daimlerchrysler Ag Brennstoffeinspritzventil
DE10358913A1 (de) 2003-12-16 2005-09-01 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102005006818A1 (de) * 2005-02-15 2006-08-17 Volkswagen Mechatronic Gmbh & Co. Kg Dichtungseinrichtung für einen Kraftstoffinjektor sowie Verfahren zum Abdichten
US7513242B2 (en) * 2007-05-03 2009-04-07 Cummins Inc. Fuel injector assembly with injector seal retention
DE102007029152A1 (de) * 2007-06-25 2009-01-08 Robert Bosch Gmbh Scheibenwischerantrieb
JP2009191672A (ja) * 2008-02-13 2009-08-27 Mitsubishi Heavy Ind Ltd 燃料噴射弁装置
US7942132B2 (en) 2008-07-17 2011-05-17 Robert Bosch Gmbh In-line noise filtering device for fuel system
DE102009000285A1 (de) * 2009-01-19 2010-07-22 Robert Bosch Gmbh Kraftstoff-Injektor sowie Brennkraftmaschine mit Kraftstoff-Injektor
DE102012202254A1 (de) * 2012-02-15 2013-08-22 Robert Bosch Gmbh Brennstoffeinspritzventil
JP5831510B2 (ja) 2012-11-20 2015-12-09 株式会社デンソー 燃料噴射弁および燃料噴射弁の取付方法
US10036355B2 (en) 2013-08-08 2018-07-31 Cummins Inc. Heat transferring fuel injector combustion seal with load bearing capability
US9410520B2 (en) * 2013-08-08 2016-08-09 Cummins Inc. Internal combustion engine including an injector combustion seal positioned between a fuel injector and an engine body

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Publication number Priority date Publication date Assignee Title
US1392536A (en) * 1919-04-05 1921-10-04 C A Cooper Piston-ring
US1495909A (en) 1922-08-26 1924-05-27 Anton M Kroczek Piston ring
US3097855A (en) * 1959-06-26 1963-07-16 George H Allen Sealing arrangement
US3655208A (en) * 1970-04-13 1972-04-11 Mc Donnell Douglas Corp Split piston ring and method of manufacture
US4528959A (en) * 1984-01-23 1985-07-16 Deere & Company Seal for an internal combustion engine
US4713867A (en) * 1985-04-15 1987-12-22 Duke Fox Piston rings with a gap seal
US5247918A (en) * 1992-09-17 1993-09-28 Siemens Automotive L.P. Sealing a direct injection fuel injector to a combustion chamber
US5289627A (en) * 1992-12-18 1994-03-01 Chrysler Corporation Fuel injector assembly and calibration method
JP3324887B2 (ja) * 1994-11-08 2002-09-17 本田技研工業株式会社 油圧シール装置
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
JPH09112697A (ja) * 1995-10-17 1997-05-02 Mitsubishi Electric Corp シールリング
US5779243A (en) 1996-11-21 1998-07-14 Delaware Capital Formation, Inc. Piston ring set for reciprocating engines
FR2762051B1 (fr) * 1997-04-10 1999-05-21 Peugeot Dispositif de fixation d'un injecteur de carburant sur une culasse de moteur a combustion interne
DE19739150A1 (de) * 1997-09-06 1999-03-11 Bosch Gmbh Robert Brennstoffeinspritzventil
JPH11210886A (ja) 1998-01-23 1999-08-03 Nok Corp ガスケット
DE19808068A1 (de) * 1998-02-26 1999-09-02 Bosch Gmbh Robert Brennstoffeinspritzventil

Also Published As

Publication number Publication date
JP2004518862A (ja) 2004-06-24
WO2002068814A1 (fr) 2002-09-06
US6921033B2 (en) 2005-07-26
DE10109407A1 (de) 2002-09-05
US20030155446A1 (en) 2003-08-21
DE50205341D1 (de) 2006-01-26
CN1457392A (zh) 2003-11-19
EP1366286A1 (fr) 2003-12-03
CZ20023491A3 (en) 2004-05-12

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