EP3014105A1 - Injecteur de carburant - Google Patents

Injecteur de carburant

Info

Publication number
EP3014105A1
EP3014105A1 EP14731623.6A EP14731623A EP3014105A1 EP 3014105 A1 EP3014105 A1 EP 3014105A1 EP 14731623 A EP14731623 A EP 14731623A EP 3014105 A1 EP3014105 A1 EP 3014105A1
Authority
EP
European Patent Office
Prior art keywords
region
injector
fuel
sealing element
combustion chamber
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
EP14731623.6A
Other languages
German (de)
English (en)
Other versions
EP3014105B1 (fr
Inventor
Joachim Winter
Frank Stadler
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 EP3014105A1 publication Critical patent/EP3014105A1/fr
Application granted granted Critical
Publication of EP3014105B1 publication Critical patent/EP3014105B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • 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 invention relates to a fuel injector according to the preamble of
  • Such a fuel injector is known from DE 10 2012 219654 A1
  • the sleeve is in turn with a flange radially surrounding edge on a seat surface of a receiving bore of the
  • Cylinder head of the internal combustion engine The known sealing element is used to prevent condensate from entering the annular region facing away from the combustion chamber between the receiving bore and the fuel injector.
  • a fuel injector is also known whose side facing the combustion chamber is provided on the outside of the injector housing with a coating which is arranged or formed at least in the end region of the injector housing close to the combustion chamber.
  • the coating can be made of different material, which has either a better or a poorer thermal conductivity than the material of the injector.
  • Section of the injector is surrounded by a sleeve.
  • the sleeve known from the cited document is used solely and solely
  • the injector tends to increase the thermal-mechanical load on the fuel injector in the end region. It is therefore desirable to have measures which limit the temperature increase in the injector end region (meaning in this case the region which is arranged on the side facing the combustion chamber of the internal combustion engine) or the best possible heat transfer from the injector end region to the injector end region
  • Cylinder block is made possible.
  • the combustion chamber of the internal combustion engine facing region of the fuel injector is arranged at a radial distance in the receiving bore, so that a
  • the invention has the object, a fuel injector according to the preamble of claim 1 such that a reduced temperature load of the combustion chamber facing Injektorend Schemes is made possible.
  • This object is achieved with a fuel! Njektor with the characteristics of the Claim 1 achieved in that a combustion chamber facing the first sealing element axially between the injector and a second housing
  • Contact surface of the receiving opening can be tensioned and is adapted to the annular region between the injector and the receiving bore on the first region of the injector facing away from the first
  • Combustion gases reach their relatively high temperatures in the axial direction into the seating area of the fuel injector in the receiving bore. This in turn reduces the thermal load on the area of the injector housing which is decisive for the heat conduction to the second sealing element, thereby enabling improved heat dissipation of the combustion chamber facing, in particular dome-shaped end region of the injector housing to the first seat surface of the receiving opening.
  • This seal is made possible via the second seat of the receiving opening, which in the installation position of the fuel! Njektors is arranged in direct contact with the first sealing element and thus the annular region above the first
  • the first sealing element is annular and abuts axially on the transition region between the first region and the second region of the injector housing.
  • the first sealing element is annular with a conical cross-sectional shape and rests between two conical surfaces of the injector and the receiving opening.
  • Such training has the particular advantage that a relatively large-scale system or sealing surface is made possible, so that even relatively small axial clamping forces sufficient to achieve a particularly good tightness.
  • Particularly preferred is in the two last-mentioned variants, when the first sealing element made of plastic and / or metal and is adapted to be received with slight radial play in the receiving opening of the cylinder head, and if the second sealing element made of metal, preferably from good thermally conductive material and is annular.
  • Such a design allows in particular a relatively simple installation of the fuel! Njektors and provides the desired or required on the existing second metal sealing element
  • the first sealing element may for example consist of a metallic core, with a
  • Coating or similar made of plastic or rubber is sheathed.
  • Sealing elements that are realized by separate components.
  • the two sealing elements are formed on a one-piece component in the form of a sealing sleeve made of metal. Such a design allows a particularly simple and safe installation of the fuel! njektors.
  • the first sealing element is formed as a conical wall portion of the sealing sleeve.
  • the wall section forms an end region of the sealing sleeve on the side of the cylinder head facing the combustion chamber.
  • a further preferred embodiment of the invention which is a particularly simple assembly or uncritical component tolerance in terms of
  • Injector housing allows in the cylinder head, provides that the sealing sleeve, except in the region of the first sealing element is arranged at a radial distance from the injector and has a diameter such that the sealing sleeve is positionable in heat-conducting contact with the receiving opening.
  • Fig. 2 shows a combustion chamber of an internal combustion engine facing
  • FIG. 3 shows an embodiment modified from FIG. 2, in which the first sealing element has a larger axial distance from the combustion chamber
  • Fig. 4 shows an embodiment using a one
  • Fig. 5 shows an embodiment in which the two sealing elements are formed or arranged on a sealing sleeve, also in longitudinal section.
  • the same elements or elements with the same function are provided in the figures with the same reference numerals.
  • a portion of a cylinder head 100 of an otherwise not shown internal combustion engine is shown.
  • the receiving bore 101 embodied as a through-bore has at least the three bore sections 102, 103 and 104 shown in the figures.
  • the three bore sections 102 to 104 are preferably each cylindrical, wherein in the transition region between the
  • Bore portion 102 and bore portion 103 a first, with respect to the longitudinal axis 1 1 of the fuel! Njektors 10 by way of example vertically arranged contact surface 105, and between the two bore sections 103 and 104, a second, in relation to the longitudinal axis 11 also exemplarily vertically arranged contact surface 106 is formed.
  • the bore section 102 which has the smallest diameter of the bore sections 102 to 104, opens directly into the combustion chamber of the internal combustion engine.
  • the injector 10 has a metallic injector housing 15 with at least three areas 16 to 18.
  • the first area 16 forms a
  • Nozzle 19 with at least one, but in practice more
  • Injection openings 21 for injecting fuel into the combustion chamber of the internal combustion engine.
  • the first area 16 is partially in the first
  • Bore portion 102 is arranged and projects with its dome-shaped end into the combustion chamber of the internal combustion engine.
  • the injector 15 For injecting the fuel into the combustion chamber of the internal combustion engine inside the injector 15 in a conventional manner in the direction of the longitudinal axis 1 1 of the fuel injector 10 up and down movable nozzle needle or the like arranged, the at least one in its lowered position
  • Injection opening 21 closes and in a raised position, the at least one injection port 21 releases (not shown).
  • the operation The nozzle needle or the injection valve member is also carried out in a known per se, and therefore unspecified manner, for example, by a magnetic actuator or a piezoelectric actuator.
  • the second region 17 is arranged within the two bore sections 103 and 104, while the third region 18 is arranged exclusively in the third
  • Hole section 104 is arranged.
  • the injector housing 15 is arranged in operative connection with a nozzle retaining nut 22 which houses the injector housing 15 and the fuel injector 10, respectively
  • the sealing ring 23 preferably comprises the second region 17 of the injector housing 15 with only a slight radial clearance and has an outer diameter which substantially corresponds to the outer diameter of the third region 18 of the
  • Injector housing 15 is adjusted.
  • the sealing ring 23 serves on the one hand the
  • the sealing ring 23 is preferably made of a good heat conducting material, for example made of copper.
  • Injector housing 15 is a seal 25 in the form of a plastic sealing ring, e.g. consisting of Viton arranged.
  • the seal 25 is arranged axially between the second region 17 of the injector housing 15 and the first contact surface 105 in the receiving bore 101 with preferably only relatively little radial play in the receiving bore 101 and via the nozzle retaining nut 22 so axially in the direction of the longitudinal axis 1 1 of the fuel injector 10th kraftbeaufschlagt that a seal of the receiving bore 101 on the
  • Combustion chamber facing away from the seal 25 is made possible.
  • this also widens radially, so that, depending on the diameter of the seal 25 and the receiving bore 101, a radial seal between the seal 25 and the receiving bore 101 may additionally be formed.
  • the diameters between the first region 16 and the first bore portion 102 of the receiving bore 101 are matched to one another such that a first radial gap 27 is formed between the first region 16 and the first bore portion 102.
  • the diameters of the second region 17 of the injector housing 15 and of the second bore section 103 of the receiving bore 101 are matched to one another such that a second radial gap 28 is formed between the second region 17 and the second bore section 103.
  • the seal 25 has in addition to its function of sealing the second
  • Radial gap 28 to the combustion chamber of the internal combustion engine possibly the function of positioning or centering of the fuel injector 10 in the
  • the nozzle tip 19 or the first region 16 of the injector housing 15 is thermally stressed due to its proximity to the combustion chamber, that is, the first region 16 has an elevated temperature compared to the other regions 17, 18 of the injector housing 15.
  • the heat flow from the nozzle tip 19 into the region of the cylinder head 100 is shown.
  • the heat transfer from the first region 16 of the injector 15 only over the second region 17 and the third region 18 and over the
  • Nozzle clamping nut 22 and the sealing ring 23 in the cylinder head 100 takes place.
  • the fuel injector 10a shown in FIG. 2 is different from the fuel! Njektor 10 in that instead of a plastic existing
  • Seal 25 is a preferably made of good heat conducting material seal 25a is used.
  • the seal 25a is exemplary, but not limiting, designed as a copper ring and also allows a direct heat transfer from the first region 16 and the nozzle tip 19 of the injector 15 in the cylinder head 100 in a combustion chamber near
  • the fuel injector 10b according to FIG. 3 differs from that
  • Fuel injector 10a of Fig. 2 in that the seal 25b with respect to the longitudinal axis 1 1 of the fuel! Nubject 10b has moved back from the combustion chamber, that is closer to the sealing ring 23 is located. This will be the one on the other hand, the position of the seal 25b can influence the heat flow through the seal (25b). Furthermore, it can be seen that the first bore portion 102a has a greater axial length than the bore portion 102 in the fuel injectors 10 and 10a. Likewise, the first region 16b of the fuel injector 10b is formed extended with respect to the fuel injectors 10 and 10a.
  • the fuel injector 10c of FIG. 4 is in principle comparable to the fuel injector 10a. Instead of a flat seal 25a, however, is an in
  • Cross-section conical (metallic) seal 25c use, the at correspondingly conical or inclined surfaces 33 and 34 on the fuel! Nj ejector 10c and the injector 15 and the receiving bore 101 are formed.
  • the gasket 25c faces the gasket 25a in the fuel! Njektor 10 a the advantage of an enlarged contact surface on the
  • Fuel injector 10c and the cylinder head 100 so that a particularly good heat transfer from the fuel! Necessor 10c on the cylinder head 100 is made possible.
  • a particularly good centering of the fuel injector 10c in the receiving bore 101 is additionally possible by the conical shape.
  • Fig. 5 is a once again modified fuel! shown injector 10d, in which the function of the seal 25c and the sealing ring 23 of the fuel! Njektors 10c of Fig. 4 are realized by a one-piece component in the form of a sealing sleeve 35.
  • the consisting of good heat conducting material sealing sleeve 35 has on the combustion chamber of the internal combustion engine facing end face a conical first sealing portion 36 as the first sealing element, while the flange-shaped peripheral edge on the other end face of the sealing sleeve 35 forms a second sealing region 37 and a second sealing element , It is still essential that the
  • Bore portion 103 d is matched to the diameter of the bore portion 103 d such that the outer periphery of the sealing sleeve 35 abuts against the second bore portion 103 d of the receiving bore 101, so that a
  • Heat transfer from the nozzle tip 19 via the first sealing region 36 and the sealing sleeve 35 is made possible in the region of the second bore section 103d of the cylinder head 100, which should be illustrated by the arrows 38.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un injecteur de carburant (10; 10a à 10d), en particulier un injecteur à rampe commune, comprenant un boîtier (15) d'injecteur qui peut être placé dans une ouverture de réception (101) de la culasse (100) d'un moteur à combustion interne et présente, dans une position de montage, une première zone (16) qui est orientée vers une chambre de combustion du moteur à combustion interne et à laquelle se raccorde au moins une deuxième zone (17, 18) au diamètre agrandi sur le côté opposé à la chambre de combustion, la première zone (16) étant constituée de métal et étant entourée radialement sur le côté orienté vers la chambre de combustion par un premier élément d'étanchéité (25; 25a; 25b; 25c; 36) qui peut être inséré dans l'espace annulaire entre la première zone (16) du boîtier (15) d'injecteur et l'ouverture de réception (101) dans la région d'une première partie (103; 103d) de l'ouverture de réception (101), un deuxième élément d'étanchéité (23; 37) pouvant être axialement serré sur le côté opposé à la chambre de combustion entre le boîtier (15) d'injecteur et une surface de contact (106) de l'ouverture de réception (101) pour le boîtier (15) d'injecteur.
EP14731623.6A 2013-06-26 2014-06-18 Injecteur de carburant Not-in-force EP3014105B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013212321.3A DE102013212321A1 (de) 2013-06-26 2013-06-26 Kraftstoffinjektor
PCT/EP2014/062889 WO2014206850A1 (fr) 2013-06-26 2014-06-18 Injecteur de carburant

Publications (2)

Publication Number Publication Date
EP3014105A1 true EP3014105A1 (fr) 2016-05-04
EP3014105B1 EP3014105B1 (fr) 2017-08-09

Family

ID=50979766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14731623.6A Not-in-force EP3014105B1 (fr) 2013-06-26 2014-06-18 Injecteur de carburant

Country Status (8)

Country Link
EP (1) EP3014105B1 (fr)
JP (1) JP2016520765A (fr)
CN (1) CN105339648A (fr)
BR (1) BR112015032184A2 (fr)
DE (1) DE102013212321A1 (fr)
ES (1) ES2646549T3 (fr)
RU (1) RU2016102193A (fr)
WO (1) WO2014206850A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020078817A1 (fr) 2018-10-17 2020-04-23 Robert Bosch Gmbh Système d'injection

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015225055A1 (de) * 2015-12-14 2017-06-14 Robert Bosch Gmbh Kraftstoffinjektor

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5129124U (fr) * 1974-08-28 1976-03-02
JPS5630688Y2 (fr) * 1977-10-18 1981-07-21
JPS5758770U (fr) * 1980-09-25 1982-04-07
FR2763649B1 (fr) * 1997-05-20 1999-06-25 Peugeot Dispositif de fixation d'un injecteur de carburant sur une culasse de moteur a combustion interne, et un procede de montage de cet injecteur
DE19743103A1 (de) * 1997-09-30 1999-04-01 Bosch Gmbh Robert Wärmeschutzhülse
DE60020463T2 (de) 1999-09-03 2006-04-27 Delphi Technologies, Inc., Troy Einspritzdüse
DE10108194A1 (de) * 2001-02-21 2002-08-29 Bosch Gmbh Robert Dichtvorrichtung für ein Brennstoffeinspritzventil
DE10125943A1 (de) 2001-05-29 2002-12-05 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102004049277A1 (de) * 2004-10-09 2006-04-13 Robert Bosch Gmbh Dämpfungselement für ein Brennstoffeinspritzventil
JP2007107456A (ja) * 2005-10-13 2007-04-26 Toyota Motor Corp 燃料噴射弁用防熱スリーブ
JP2009191672A (ja) * 2008-02-13 2009-08-27 Mitsubishi Heavy Ind Ltd 燃料噴射弁装置
JP4483955B2 (ja) * 2008-02-28 2010-06-16 株式会社デンソー エンジンヘッドモジュール
JP5243922B2 (ja) * 2008-10-24 2013-07-24 株式会社豊田自動織機 内燃機関の燃料噴射装置
DE102012219654A1 (de) 2012-10-26 2014-04-30 Robert Bosch Gmbh Kraftstoffinjektor

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2014206850A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020078817A1 (fr) 2018-10-17 2020-04-23 Robert Bosch Gmbh Système d'injection

Also Published As

Publication number Publication date
DE102013212321A1 (de) 2014-12-31
EP3014105B1 (fr) 2017-08-09
ES2646549T3 (es) 2017-12-14
CN105339648A (zh) 2016-02-17
BR112015032184A2 (pt) 2017-07-25
RU2016102193A3 (fr) 2018-05-15
WO2014206850A1 (fr) 2014-12-31
JP2016520765A (ja) 2016-07-14
RU2016102193A (ru) 2017-07-31

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