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EP1003965B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

Info

Publication number
EP1003965B1
EP1003965B1 EP99911578A EP99911578A EP1003965B1 EP 1003965 B1 EP1003965 B1 EP 1003965B1 EP 99911578 A EP99911578 A EP 99911578A EP 99911578 A EP99911578 A EP 99911578A EP 1003965 B1 EP1003965 B1 EP 1003965B1
Authority
EP
European Patent Office
Prior art keywords
metal ring
injection valve
fuel injection
nozzle body
fuel injector
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
EP99911578A
Other languages
German (de)
English (en)
Other versions
EP1003965A1 (fr
Inventor
Martin Maier
Christian Preussner
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 EP1003965A1 publication Critical patent/EP1003965A1/fr
Application granted granted Critical
Publication of EP1003965B1 publication Critical patent/EP1003965B1/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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M2200/22—Fuel-injection apparatus with bimetallic or memory shape alloy elements

Definitions

  • the invention relates to a fuel injector with a nozzle body which direct injection of fuel into the combustion chamber of an internal combustion engine in a Location bore of a cylinder head of the internal combustion engine can be used.
  • the invention relates to a fuel injector of the genus Main claim.
  • fuel injectors are for example from the DE 30 00 061 C2 and GB-PS 759 524 known.
  • DE 30 00 061 C2 discloses to provide a heat apron sleeve on the nozzle body of the fuel injector.
  • a flange of the heat protection sleeve is in an inner groove of the fuel injector inserted and by means of a sealing ring against the receiving bore of the cylinder head sealed.
  • the heat protection sleeve has an annular, inwardly bent collar on which there is an elastic heat protection ring supported.
  • the heat protection ring is between the spray-side end of the nozzle body of the fuel injector and the annular, inwardly bent collar of the Heat protection sleeve arranged.
  • a metal ring is in a groove arranged a nozzle body of the fuel injector and in contact with the bore of the cylinder head fitted.
  • a disadvantage of these known fuel injection valves is that the thermal Coupling between the nozzle body and the cylinder head is not yet entirely satisfactory is solved because the radial compression due to the maximum permissible assembly forces is limited. There is therefore a risk during the operation of the internal combustion engine overheating of the nozzle body and so-called coking.
  • the fuel injector according to the invention with the characterizing features of The main claim has the advantage that a good thermal connection of the Fuel injector on the cylinder head with easy assembly of the fuel injector is possible.
  • the fuel injector can be easily inserted into the mounting hole and nevertheless ensures a sufficiently large radial compression between the used fuel injector and the cylinder head, which makes a good thermal coupling is guaranteed.
  • the metal ring only deforms when it is reached the required temperature during operation of the internal combustion engine.
  • the outer diameter of the metal ring is advantageously less than before heating the diameter of the location hole. This measure enables easy Assembly of the fuel injector in the location hole.
  • the Metal ring before inserting the fuel injector into the mounting hole the nozzle body attached or attached to this. It usually prevails Room temperature.
  • the fuel injector reaches when the internal combustion engine is operating Temperatures up to about 200 ° C. At this temperature, however, a Coking occurs. Due to the deformation of the metal ring when the The fuel injector deforms after the internal combustion engine is started up Metal ring and causes a radial compression of the fuel injector in the Location hole in such a way that a good thermal connection to the cylinder head he follows. This transfers heat from the fuel injector through the cylinder head derived, causing the operating temperature of the fuel injector to be below 150 ° C can be lowered, thereby avoiding coking.
  • the metal ring is in one Groove of the nozzle body arranged. This makes it even easier Applicability of the fuel injector in the receiving bore and a safe ensures axial retention of the metal ring on the fuel injector.
  • the metal ring attached to an outer wall of the nozzle body by a fastener.
  • the Fastening means can, for example, by welding, by clamping, be formed by rivets, screws, etc.
  • the metal ring is preferably made of bimetal.
  • the metal ring consists of a metal Shape memory (memory metal).
  • the metal ring in the Temperature range of the room temperature has a diameter that is smaller than that Diameter of the receiving bore of the fuel injector is while it is in the Operating temperature range of the fuel injector a correspondingly larger Has a diameter that ensures the required radial compression.
  • the metal ring consists of a metal a coefficient of thermal expansion that is different from the coefficient of thermal expansion of the nozzle body is different. When heated to the operating temperature, it expands the metal ring, however, if it is arranged in the groove of the nozzle body, only dodge in the radial direction towards the mounting hole and thus represents the radial one Pressing forth. The same applies to the case where the metal ring is on or near its outer edges is attached to the nozzle body, since that between the attachments lying intermediate area of the metal ring when heated to the operating temperature only can dodge in the radial direction to the mounting hole.
  • the metal ring can be at least partially soft Metal coated to better match the fuel injector or to allow the mounting hole of the cylinder head.
  • a sectional view of a fuel injector 1 is shown, which in a Receiving bore 2 of a cylinder head 4 shown in excerpt is arranged.
  • the receiving bore 2 of the cylinder head 4 is a stepped bore formed, which are symmetrical to their longitudinal axis up to a combustion chamber 3 Internal combustion engine extends.
  • the fuel injector 1 is in this Receiving hole 2 is used and is used to inject fuel directly into the Combustion chamber 3 of the internal combustion engine.
  • the fuel passes through the combustion chamber 3 facing end of the fuel injector 1 in the combustion chamber 3.
  • the part of the fuel injection valve 1 facing the combustion chamber 3 is by a Nozzle body 5 formed.
  • a circumferential groove 7 of the nozzle body 5 is a metal ring 6 arranged, a thermal during operation of the internal combustion engine Connection of the fuel injector 1 to the cylinder head 4 guaranteed.
  • Im in the Fig. 1 example is the groove 7 with the metal ring 6 near the arranged spray-side end of the nozzle body 5. This arrangement is a efficient removal of the combustion engine 3 when the internal combustion engine is operating Spray-side end of the fuel injector 1 heat from Fuel injector 1 ensured on the cylinder head 4.
  • the metal ring 6 is such deformed that the fuel injector 1 presses radially in the receiving bore 2 is. Since the metal ring before heating or before reaching the operating temperature has a smaller diameter m than after heating (diameter M), that can Fuel injector 1 can be easily inserted into the receiving bore 2.
  • Heating causes a sufficiently large radial compression, so that a good one Heat transfer between the fuel injection valve 1 and the cylinder head 4 is ensured.
  • the fit of the metal ring 6 to the receiving bore 2 of the Cylinder head 4 in the operating state corresponds to a transition fit.
  • Fig. 2 is the partial section II of Fig. 1 for a first embodiment of the Metal ring 6 shown, in which it consists of a bimetal.
  • the fuel injector 1 facing inner part 9 of the metal ring 6 is there for example made of steel and the outer part 8 of the metal ring 6 consists z. B. from Aluminum. 2 shows the operating state in which the internal combustion engine is in operation and the fuel injector 1 and thus also the metal ring 6 are warmed accordingly.
  • the metal ring 6 is deformed in this state, that it has an area with a largest outer diameter M, as in FIG is recognizable.
  • This largest outside diameter M would be if the fuel injector 1 would not be inserted into the receiving bore 2, larger than the diameter D of the Receiving hole 2 of the fuel injector 1, so that in the inserted state correspondingly large radial compression of the fuel injector in the Location hole 2 is ensured.
  • Fig. 3 is the partial section II of Fig. 1 for a second embodiment of the Metal ring 6 shown.
  • the metal ring 6 consists of a metal 10 with a shape memory or the metal ring 6 is made of one Memory metal that is produced when heated in a particular Temperature range always takes the same shape.
  • 3 is the State of the metal ring 6 before reaching the operating temperature, d. H. at room temperature shown. In this state, the largest diameter m of the metal ring 6 is smaller than the diameter D of the receiving bore so that the fuel injector 1 easily in the mounting hole 2 can be used.
  • the Diameter m at room temperature smaller than the outside diameter of the nozzle body 5 outside the groove 7, but it could also be a little larger, as long as it is smaller than that Diameter D of the receiving bore 2.
  • the metal ring 6 which is made of a metal, deforms 10 with shape memory so that the area with the largest Diameter receives a diameter M which, when not in use Fuel injector 1 is larger than the diameter D of the receiving bore 2. In this way, as shown in Fig. 4. a sufficiently large radial Pressing achieved with the cylinder head 4, since the metal ring 6 on the wall of the Receiving hole 2 is present so that good heat transfer is guaranteed.
  • the metal ring 6 can also be made of a metal with a coefficient of thermal expansion different from the coefficient of thermal expansion of the nozzle body 5, for example greater than This is.
  • the metal ring is clamped in the groove 7 via positive locking, expands when heated and, since it cannot deflect lengthways, a radial compression in the receiving bore 2 ago.
  • the metal ring 6 of the exemplary embodiments explained is ideally designed such that that it has areas with a diameter even in the heated or hot operating state has, which is smaller than the diameter of the nozzle body 5, so that the metal ring 6th is still held in the groove 7. Furthermore, the metal ring 6 of the first and the second exemplary embodiment if it is in the region of the room temperature or is cold, a diameter m that is smaller than the diameter D of the Location hole 2 is so that the fuel injector 1 easily into the Location hole 2 can be used.
  • 5 and 6 is another embodiment of the present invention shown.
  • 5 and 6 show a partial section of a Fuel injector 1 corresponding to that shown in FIG. 1 Fuel injector is inserted into a receiving bore 2 of a cylinder head 4.
  • the section shown in FIGS. 5 and 6 corresponds to section 2 of FIG. 1, wherein in this case the nozzle body 5 has no groove 7 for holding the metal ring 6.
  • the metal ring 6 of the present embodiment is shown in FIG Form of rivets 11 attached to an outer wall of the nozzle body 5. As in FIG. 5 and 6 can be seen, the metal ring 6 is close to its upper edge with the Nozzle body 5 connected. In Fig. 5 the case is shown in which the Fuel injector is in the room temperature range.
  • the metal ring 6 has a diameter m which is smaller than the diameter D of the Location hole 2 so that the fuel injector 1 easily in the Location hole 2 can be used.
  • the Fuel injection valve and thus the metal ring 6 to the operating temperature deforms the metal ring 6, as shown in Fig. 6, in the same way as under 2 and 4 was explained, so that a radial compression with the Cylinder head 4 is reached.
  • the metal ring 6 made of a bimetal or a metal with shape memory.
  • the Deform metal ring 6 when heated to the operating temperature so that the required radial pressing with cylinder head 4 is achieved.
  • the Metal ring 6 consists of a metal that has a coefficient of thermal expansion which differs from the coefficient of thermal expansion of the nozzle body 5 differs, the metal ring 6 must be fixed in the vicinity of its two edge areas be connected to the outer wall of the nozzle body 5.
  • the is advantageously Coefficient of thermal expansion of the metal ring 6 is greater than that of the nozzle body 5 Heating to the operating temperature deforms the middle area of the Metal ring 6 in the radial direction towards the receiving bore 2, whereby a radial Pressing can be achieved.
  • Both embodiments of the metal ring 6 can be made with a soft metal be coated to better align with the groove 7 of the nozzle body 5 and to allow the receiving bore 2 of the cylinder head 4.

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)

Claims (9)

  1. Injecteur de carburant (1) avec un corps de gicleur (5) qui peut être utilisé pour injecter directement du carburant dans un perçage de réception (2) d'une culasse (4) du moteur à combustion interne dans la chambre de combustion (3) d'un moteur à combustion interne,
    caractérisé par
    un anneau métallique (6) placé sur le corps de gicleur (5), qui se déforme lors de l'échauffement et qui provoque seulement lors de l'échauffement, après que l'injecteur de carburant (1) a été introduite dans le perçage de réception (2), une compression radiale de l'injecteur de carburant (1) dans le perçage de réception (2).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le diamètre extérieur de l'anneau métallique (6) avant l'échauffement est plus petit que le diamètre du perçage de réception (2)
  3. Injecteur de carburant selon la revendication 1 ou 2,
    caractérisé en ce que
    l'anneau métallique (6) est placé dans une rainure (7) du corps de gicleur (5).
  4. Injecteur de carburant selon la revendication 1, 2 ou 3,
    caractérisé en ce que
    l'anneau métallique (6) est fixé à une paroi extérieure du corps de gicleur (5) par un moyen de fixation (11).
  5. Injecteur de carburant selon l'une des revendications précédentes,
    caractérisé en ce que
    l'anneau métallique (6) est en un bimétal (8, 9).
  6. Injecteur de carburant selon la revendication 5,
    caractérisé en ce que
    l'anneau métallique (6) est en acier (9) sur son côté intérieur orienté vers le corps de gicleur (5) et est en aluminium (8) sur son côté extérieur opposé au corps de gicleur (5).
  7. Injecteur de carburant selon l'une des revendications 1 à 4,
    caractérisé en ce que
    l'anneau métallique (6) est en un métal (10) qui a une mémoire de forme.
  8. Injecteur de carburant selon l'une des revendications 1 à 4,
    caractérisé en ce que
    l'anneau métallique (6) est en un métal qui a un coefficient de dilatation thermique différent de celui du corps de gicleur (5).
  9. Injecteur de carburant selon l'une des revendications précédentes,
    caractérisé en ce que
    l'anneau métallique (6) est au moins partiellement recouvert d'un métal mou.
EP99911578A 1998-02-26 1999-01-29 Soupape d'injection de carburant Expired - Lifetime EP1003965B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19808068A DE19808068A1 (de) 1998-02-26 1998-02-26 Brennstoffeinspritzventil
DE19808068 1998-02-26
PCT/DE1999/000237 WO1999043950A1 (fr) 1998-02-26 1999-01-29 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1003965A1 EP1003965A1 (fr) 2000-05-31
EP1003965B1 true EP1003965B1 (fr) 2003-06-25

Family

ID=7858965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99911578A Expired - Lifetime EP1003965B1 (fr) 1998-02-26 1999-01-29 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US6186123B1 (fr)
EP (1) EP1003965B1 (fr)
JP (1) JP4308923B2 (fr)
KR (1) KR20010006536A (fr)
DE (2) DE19808068A1 (fr)
WO (1) WO1999043950A1 (fr)

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DE19941054A1 (de) * 1999-08-28 2001-03-01 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19962968A1 (de) * 1999-12-24 2001-06-28 Bosch Gmbh Robert Ausgleichselement
DE10038300A1 (de) 2000-08-05 2002-02-14 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10043084A1 (de) * 2000-09-01 2002-03-14 Bosch Gmbh Robert Spannelement für ein Brennstoffeinspritzventil und Brennstoffeinspritzanlage
US7004476B2 (en) * 2000-10-13 2006-02-28 Nok Corporation Combustion gas seal for injector
US6460512B1 (en) * 2000-10-16 2002-10-08 International Engine Intellectual Property Company, L.L.C. Combustion gasket having dual material structures
DE10103933A1 (de) 2001-01-30 2002-08-14 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10108194A1 (de) * 2001-02-21 2002-08-29 Bosch Gmbh Robert Dichtvorrichtung für ein Brennstoffeinspritzventil
DE10109407A1 (de) * 2001-02-28 2002-09-05 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10126336A1 (de) * 2001-05-30 2002-12-12 Siemens Ag Zylinderkopf und daran montierter Injektor
DE10133263A1 (de) 2001-07-09 2003-02-06 Bosch Gmbh Robert Brennstoffeinspritzventil
US6866026B2 (en) * 2002-08-28 2005-03-15 Federal-Mogul World Wide, Inc. Gasket for fuel injector
JP4081716B2 (ja) * 2003-03-07 2008-04-30 日産自動車株式会社 燃料噴射弁の冷却構造
DE112004000356D2 (de) 2003-03-27 2006-02-23 Siemens Ag Direkt-Einspritzventil in einem Zylinderkopf
DE10338715B4 (de) * 2003-08-22 2014-07-17 Robert Bosch Gmbh Ausgleichselement für ein Brennstoffeinspritzventil
JP4089577B2 (ja) * 2003-09-25 2008-05-28 トヨタ自動車株式会社 筒内噴射用インジェクタ
DE10358913A1 (de) * 2003-12-16 2005-09-01 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102005006641A1 (de) * 2005-02-14 2006-08-24 Siemens Ag Einspritzventil zum Einspritzen von Kraftstoff und Zylinderkopf
DE102005006818A1 (de) * 2005-02-15 2006-08-17 Volkswagen Mechatronic Gmbh & Co. Kg Dichtungseinrichtung für einen Kraftstoffinjektor sowie Verfahren zum Abdichten
US20070235554A1 (en) * 2006-03-29 2007-10-11 Williams Arthur R Dual stroke injector using SMA
DE102007001549A1 (de) * 2007-01-10 2008-07-17 Robert Bosch Gmbh Dehnhülsenbefestigung
US7484499B2 (en) * 2007-04-03 2009-02-03 Gm Global Technology Operations, Inc. Combustion seal
US7383818B1 (en) * 2007-04-04 2008-06-10 Gm Global Technology Operations, Inc. Fuel injector with secondary combustion seal
EP2153055B1 (fr) * 2007-05-02 2013-06-19 Robert Bosch GmbH Moteur à combustion interne pourvu d'une protection pour un élément d'étanchéité d'une soupape d'injection de carburant
US7513242B2 (en) * 2007-05-03 2009-04-07 Cummins Inc. Fuel injector assembly with injector seal retention
JP4900256B2 (ja) * 2008-01-16 2012-03-21 株式会社デンソー インジェクタ
US8220843B2 (en) * 2008-07-30 2012-07-17 Parker-Hannifin Corporation Sealing joint for connecting adjoining duct pieces in an engine exhaust system
CN104114845B (zh) * 2011-11-29 2016-09-21 百乐仕株式会社 安装工具
WO2014133615A1 (fr) 2013-03-01 2014-09-04 Rolls-Royce Corporation Joint à bande bimétallique
US9453486B1 (en) * 2015-03-20 2016-09-27 Continental Automotive Systems, Inc. Gas direct injector with reduced leakage
EP3587791B1 (fr) * 2018-06-21 2021-03-24 Claverham Limited Buse de régulation de débit

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GB759524A (en) 1952-12-30 1956-10-17 Emmerich Satzger An improved fuel injection nozzle for fuel injection internal combustion engines
FR1219366A (fr) 1958-12-26 1960-05-17 Perfectionnements aux dispositifs d'injection pour moteurs à huile lourde et analogues
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JPH09126089A (ja) 1995-11-02 1997-05-13 Nissan Motor Co Ltd 燃料噴射弁の構造

Also Published As

Publication number Publication date
DE59906080D1 (de) 2003-07-31
EP1003965A1 (fr) 2000-05-31
US6186123B1 (en) 2001-02-13
DE19808068A1 (de) 1999-09-02
KR20010006536A (ko) 2001-01-26
WO1999043950A1 (fr) 1999-09-02
JP2001522435A (ja) 2001-11-13
JP4308923B2 (ja) 2009-08-05

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