EP2153055B1 - Moteur à combustion interne pourvu d'une protection pour un élément d'étanchéité d'une soupape d'injection de carburant - Google Patents

Moteur à combustion interne pourvu d'une protection pour un élément d'étanchéité d'une soupape d'injection de carburant Download PDF

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Publication number
EP2153055B1
EP2153055B1 EP08736639.9A EP08736639A EP2153055B1 EP 2153055 B1 EP2153055 B1 EP 2153055B1 EP 08736639 A EP08736639 A EP 08736639A EP 2153055 B1 EP2153055 B1 EP 2153055B1
Authority
EP
European Patent Office
Prior art keywords
shielding ring
internal combustion
fuel injection
combustion engine
injection 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.)
Not-in-force
Application number
EP08736639.9A
Other languages
German (de)
English (en)
Other versions
EP2153055A1 (fr
Inventor
Klaus Jung
Martin Scheffel
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 EP2153055A1 publication Critical patent/EP2153055A1/fr
Application granted granted Critical
Publication of EP2153055B1 publication Critical patent/EP2153055B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02M61/166—Selection of particular materials
    • 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
    • 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
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals

Definitions

  • the present invention relates to an internal combustion engine with a seal protection for a gasket of a fuel injection valve.
  • Internal combustion engines are known from the prior art in different configurations.
  • internal combustion engines which inject a fuel by means of a fuel injection valve directly into a combustion chamber.
  • the fuel injection valve is arranged in a cylinder head and injects the fuel directly into the combustion chamber.
  • an annular seal such as a Teflon ring is used for sealing between the fuel injection valve and the cylinder head in this case. Since very high temperatures prevail in the combustion chamber during operation and the sealing ring between the fuel injection valve and the cylinder head is arranged relatively close to the combustion chamber, in particular negative thermal effects can act on the sealing ring.
  • a fuel injection valve in which a slotted shielding ring is arranged on the fuel injection valve.
  • the shielding ring is arranged between the seal and the combustion chamber and has a rectangular cross-section. In this way, however, no complete shielding of the sealing element can be ensured, since due to the slot and the rectangular cross-section no complete protection of the sealing element is possible.
  • JP 2000 3103320 reveal an O-ring as a sealing element and a rectangular shielding ring.
  • US 5,794,856 and DE 10 103 826 A1 disclose injectors with two O-rings, which are low-pressure injectors mounted in the intake manifold or cylinder head, which do not inject directly into the combustion chamber.
  • the internal combustion engine according to the invention with the features of claim 1 has the advantage over that it provides excellent shielding for a arranged between a fuel injection valve and a cylinder head sealing element, so that the sealing element has a very long life.
  • the shield is arranged in the axial direction of the fuel injection valve between the sealing element and a combustion chamber of the internal combustion engine.
  • the shield has a ring shape, which in addition has a round cross section or a radially outwardly rounded cross-section.
  • the use of the round or rounded cross-section of the shielding ring makes it possible for the shielding ring to sit firmly between the cylinder head wall and an outer housing wall of the fuel injection valve.
  • the shielding ring is preferably arranged in a groove formed in the fuel injection valve.
  • the cylinder head wall can be very easily, e.g. as a cylindrical bore, be formed.
  • the shielding ring and the sealing element are arranged in a common groove in the fuel injection valve and spaced from each other. This makes it possible that only one groove for receiving the shielding ring and the sealing element in the fuel injection valve is necessary.
  • the shielding ring particularly preferably has a closed ring shape. This can be achieved, for example, by a joining operation of the free ends of the shielding ring, e.g. by welding or gluing done. As a result, in particular problems are avoided at a gap between the fuel injection valve and the cylinder head wall.
  • the shield ring has an open, i. radially slotted, ring shape on. As a result, the shielding ring can be widened during assembly.
  • the shielding ring is arranged in a groove which is formed in the cylinder head.
  • the shielding ring can be mounted in the cylinder head before the fuel injection valve is mounted.
  • the shield ring is arranged partially in a groove formed in the cylinder head and partly in a groove formed in the fuel injection valve.
  • the shielding ring is partially seated in the wall of the cylinder head and partially in the housing of the fuel injection valve, each correspondingly deep grooves are formed.
  • the grooves preferably have a depth which corresponds to a radius of the shielding ring with a round cross section.
  • the shielding ring with a thin-walled C-shaped profile which has a convex curvature radially outward and thus encloses an open cavity towards the inside.
  • this embodiment of the shield is a particularly material-saving variant, which provides a high elasticity and shielding security.
  • the shielding ring 7 with round cross section has the advantage that it allows a linear seal on the cylinder head and a linear seal on the fuel injection valve 3. In this way it can be ensured that influences from the combustion chamber 4 do not act directly on the sealing element 6. This allows the sealing element 6 have a very long life. In particular, the sealing element 6 can thereby be protected from a direct effect of the combustion chamber gases.
  • FIG. 2 an internal combustion engine 1 according to a second embodiment of the invention described in detail. Identical or functionally identical parts are denoted by the same reference numerals as in the first embodiment.
  • the sealing element 6 and the shielding ring 7 are in a common groove 9, which is provided in the fuel injection valve 3, arranged in the second embodiment.
  • the sealing element 6 and the shielding ring 7 are arranged directly adjacent to one another in the groove 9.
  • a simpler and more cost-effective production is possible since only one common groove for the sealing element 6 and the shielding ring 7 in the housing portion of the fuel injection valve 3 must be made.
  • a predetermined distance between the sealing element 6 and the shielding ring 7 in the common groove 9 may be present. Otherwise, this embodiment corresponds to the previous embodiment, so that reference can be made to the description given there.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (12)

  1. Moteur à combustion interne, comportant une chambre de combustion (4) et une soupape d'injection de carburant (3) qui injecte du carburant (5) directement dans la chambre de combustion (4), la soupape d'injection de carburant (3) étant disposée dans une tête de cylindre (2) et un élément d'étanchéité annulaire (6) étant disposé entre la soupape d'injection de carburant (3) et la tête de cylindre (2), afin de fermer hermétiquement la chambre de combustion (4), et une bague de protection (7) étant disposée entre l'élément d'étanchéité (6) et la chambre de combustion (4) dans une direction axiale (X-X) de la soupape d'injection de carburant (3), caractérisé en ce que la bague de protection (7) présente une section transversale ronde ou une section transversale arrondie radialement à l'extérieur.
  2. Moteur à combustion interne selon la revendication 1, caractérisé en ce que la bague de protection (7) est fabriquée en fil métallique ou en plastique résistant aux températures élevées.
  3. Moteur à combustion interne selon l'une quelconque des revendications précédentes, caractérisé en ce que la bague de protection (7) est disposée dans une rainure (17, 9, 9a) formée dans la soupape d'injection de carburant (3).
  4. Moteur à combustion interne selon la revendication 3, caractérisé en ce que l'élément d'étanchéité (6) est disposé dans une première rainure (16) formée dans la soupape d'injection de carburant (3) et la bague de protection (7) est disposée dans une deuxième rainure (17) formée dans la soupape d'injection de carburant (3).
  5. Moteur à combustion interne selon la revendication 1 ou 2, caractérisé en ce que la bague de protection (7) et l'élément d'étanchéité (6) sont disposés dans une rainure commune (9) et la bague de protection (7) est espacée de l'élément d'étanchéité (6) ou la bague de protection (7) est en contact avec l'élément d'étanchéité (6).
  6. Moteur à combustion interne selon l'une quelconque des revendications précédentes, caractérisé en ce que la bague de protection (7) présente une forme annulaire fermée ou une forme annulaire ouverte.
  7. Moteur à combustion interne selon la revendication 1 ou 2, caractérisé en ce que la bague de protection (7) est disposée partiellement dans une rainure (2a) formée dans la tête de cylindre (2) et partiellement dans une rainure (3a) formée dans la soupape d'injection de carburant (3).
  8. Moteur à combustion interne selon la revendication 7, caractérisé en ce que la rainure (2a) formée dans la tête de cylindre (2) et la rainure (3a) formée dans la soupape d'injection de carburant (3) présentent respectivement la même profondeur, en particulier une profondeur correspondant à un rayon de la bague de protection (7) présentant une section transversale ronde.
  9. Moteur à combustion interne selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un diamètre de la bague de protection (7) est égal à une épaisseur de l'élément d'étanchéité (6) dans la direction radiale.
  10. Moteur à combustion interne selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la paroi de délimitation radialement extérieure de la bague de protection (7) s'étend de manière arrondie au moins dans une région partielle, un rayon constant étant prévu sur toute son épaisseur ou des régions de coin arrondies étant façonnées.
  11. Moteur à combustion interne selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la bague de protection (7) présente un profil en forme de C à paroi mince doté d'une courbure convexe radialement vers l'extérieur et entoure ainsi vers l'intérieur un espace creux ouvert.
  12. Moteur à combustion interne selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un espace de réception (10) est disposé d'un côté de l'élément d'étanchéité (6) opposé à la chambre de combustion, afin de recevoir la matière abrasée de l'élément d'étanchéité (6).
EP08736639.9A 2007-05-02 2008-04-30 Moteur à combustion interne pourvu d'une protection pour un élément d'étanchéité d'une soupape d'injection de carburant Not-in-force EP2153055B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102007020506 2007-05-02
PCT/EP2008/055328 WO2008135489A1 (fr) 2007-05-02 2008-04-30 Moteur à combustion interne pourvu d'une protection pour un élément d'étanchéité d'une soupape d'injection de carburant
DE102008001489A DE102008001489A1 (de) 2007-05-02 2008-04-30 Brennkraftmaschine mit Dichtungsschutz für ein Kraftstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP2153055A1 EP2153055A1 (fr) 2010-02-17
EP2153055B1 true EP2153055B1 (fr) 2013-06-19

Family

ID=39671509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08736639.9A Not-in-force EP2153055B1 (fr) 2007-05-02 2008-04-30 Moteur à combustion interne pourvu d'une protection pour un élément d'étanchéité d'une soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US20110303192A1 (fr)
EP (1) EP2153055B1 (fr)
CN (1) CN101675241B (fr)
BR (1) BRPI0807545A2 (fr)
DE (1) DE102008001489A1 (fr)
WO (1) WO2008135489A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012202254A1 (de) * 2012-02-15 2013-08-22 Robert Bosch Gmbh Brennstoffeinspritzventil
EP2636880A1 (fr) * 2012-03-06 2013-09-11 Delphi Automotive Systems Luxembourg SA Joint d'étanchéité de pointe d'un injecteur
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
DE102013200909A1 (de) * 2013-01-22 2014-07-24 Robert Bosch Gmbh Brennstoffeinspritzanlage mit einer Brennstoff führenden Komponente, einem Brennstoffeinspritzventil und einem Verbindungselement
JP5910586B2 (ja) * 2013-08-23 2016-04-27 株式会社デンソー 燃料噴射弁
DE102014225976A1 (de) * 2014-12-16 2016-06-16 Robert Bosch Gmbh Brennstoffeinspritzvorrichtung
GB201511355D0 (en) * 2015-06-29 2015-08-12 Delphi Int Operations Lux Srl Sealing arrangement
GB201602694D0 (en) * 2016-02-16 2016-03-30 Delphi Internat Operations Luxembourg S À R L Nozzle assembly and fuel injector
US11192210B2 (en) * 2016-10-31 2021-12-07 Cummins Inc. Injector sleeve assembly and method for field repair procedure
DE102017222941A1 (de) * 2017-12-15 2019-06-19 Siemens Aktiengesellschaft Hochspannungsleistungsschalter und Verfahren zum elektromagnetischen Abschirmen einer Vakuumschaltröhre in einem Isolator
DE102018221403A1 (de) 2018-12-11 2020-06-18 Robert Bosch Gmbh Brennstoffeinspritzvorrichtung
US11174825B2 (en) * 2019-02-11 2021-11-16 Caterpillar Inc. Seal configuration for fuel injector
DE102021202728A1 (de) * 2021-03-22 2022-09-22 Robert Bosch Gesellschaft mit beschränkter Haftung Dichtelement

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EP1063423A2 (fr) * 1999-06-23 2000-12-27 Siemens Automotive Corporation Injecteur de combustible avec dispositif d'orientation pour l'orientation d'un injecteur par rapport à un collecteur ou à une culasse
DE10103826A1 (de) * 2001-01-29 2002-08-14 Bosch Gmbh Robert Einspritzventil für Saugrohr oder Zylinderkopf mit integriertem Kraftstoffzulauf

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US5794856A (en) * 1995-05-19 1998-08-18 Siemens Automotive Corporation Air assist injector and retainer shroud therefor
EP1063423A2 (fr) * 1999-06-23 2000-12-27 Siemens Automotive Corporation Injecteur de combustible avec dispositif d'orientation pour l'orientation d'un injecteur par rapport à un collecteur ou à une culasse
DE10103826A1 (de) * 2001-01-29 2002-08-14 Bosch Gmbh Robert Einspritzventil für Saugrohr oder Zylinderkopf mit integriertem Kraftstoffzulauf

Also Published As

Publication number Publication date
CN101675241A (zh) 2010-03-17
CN101675241B (zh) 2014-12-17
US20110303192A1 (en) 2011-12-15
BRPI0807545A2 (pt) 2014-06-17
DE102008001489A1 (de) 2008-11-06
EP2153055A1 (fr) 2010-02-17
WO2008135489A1 (fr) 2008-11-13

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