EP1828594B1 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

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Publication number
EP1828594B1
EP1828594B1 EP05807953.4A EP05807953A EP1828594B1 EP 1828594 B1 EP1828594 B1 EP 1828594B1 EP 05807953 A EP05807953 A EP 05807953A EP 1828594 B1 EP1828594 B1 EP 1828594B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
cylinder head
receiving bore
shoulder surface
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 - Fee Related
Application number
EP05807953.4A
Other languages
German (de)
English (en)
Other versions
EP1828594A1 (fr
Inventor
Martin Scheffel
Christina Gerescher
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 EP1828594A1 publication Critical patent/EP1828594A1/fr
Application granted granted Critical
Publication of EP1828594B1 publication Critical patent/EP1828594B1/fr
Expired - Fee Related 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

Definitions

  • the invention relates to a fuel injection valve with a bearing surface on a shoulder surface in a receiving bore in the cylinder head according to the preamble of claim 1.
  • a compensation element for supporting a fuel injection valve in a cylinder head which is annular and is arranged between a valve housing of the fuel injection valve and a wall of a receiving bore of the cylinder head.
  • the compensation element has at least two legs, which are supported on the fuel injection valve and the cylinder head.
  • the disadvantage here is that an additional part must be installed in the final assembly of the fuel injection valve in the cylinder head.
  • High axial forces, which act on the built-in fuel injection valve and thus on the compensation element, can cause a bead, characterized in that the compensation element is impressed into the wall of the receiving bore in the cylinder head.
  • Such an impression of the compensation element complicates the Tolerance compensation when a new fuel injector is loaded into the receiving bore of the cylinder head, since a shoulder of a valve housing can tilt in the bead.
  • a disadvantage of the above document is in particular that no compact design results because an additional part that may obstruct the functionality of tolerance compensation, is installed and caused by the installation also additional costs.
  • a fuel injector for direct fuel injection into a combustion chamber in which a seal seals the gap between the fuel injection valve and the cylinder head.
  • a non-stick coating is applied in the annular gap between the nozzle body of the fuel injection valve and the wall of the cylinder head, which, depending on whether it has a solid, viscous or liquid consistency, fills the entire gap and ensures that no fuel can penetrate and burn there or incineration of the fuel fuel does not cause the combustion of parts of the fuel injection valve and the wall of the cylinder head with each other by charring a solid connection, which makes the expansion of the fuel injection valve difficult.
  • the fuel injection valve has a conically shaped transition between the valve housing and the nozzle body. So that the receiving bore in the cylinder head can accommodate the valve housing, this is also formed conical.
  • a disadvantage of the above document is that manufacturing tolerances in the valve body and the Receiving bore in previously known downstream shoulder surfaces can cause the fuel injection valve can be aligned only by applying a high force, which causes beads can arise in the downstream shoulder surface, which cause that by replacing the old fuel injection valve, the new no longer align.
  • An advantage of the invention is that the bearing surface between a downstream shoulder surface of a valve housing and a shoulder surface of a receiving bore of a cylinder head is designed so that an exchanged fuel injection valve whose valve housing has a downstream shoulder surface, which also to the geometry of the shoulder surface of the receiving bore in the cylinder head positively abuts, without problems in the receiving bore in the cylinder head can be used.
  • a pivoting of the newly inserted fuel injection valve in the receiving bore of the cylinder head for tolerance compensation is possible without the newly inserted fuel injection valve on the shoulder surface of the receiving bore in the cylinder head by tilting a bead leaves.
  • Another advantage is that the number of required between fuel injector and Räilasse sealing points on the inlet side reduced to a sealing point.
  • Fig. 1 shows a schematic and simplified view of a fuel injection system 1, which comprises a fuel injection valve 2, which is introduced into a receiving bore 3 of a cylinder head 4 of an internal combustion engine.
  • the fuel injection valve 2 is designed in the form of a direct-injection fuel injection valve 2, which can serve for the direct injection of fuel into a combustion chamber of the mixture-compressing, spark-ignition internal combustion engine (not shown).
  • the fuel injection valve 2 has at a feed side end 5 a plug connection to a fuel distributor line 6, which is sealed by a seal 7 between the fuel distributor line 6 and a feed pipe 8 of the fuel injection valve 2.
  • the fuel injection valve 2 has an electrical connection 9 for the electrical contacting for actuating the fuel injection valve 2.
  • the fuel injection valve 2 is at least in its part projecting over the cylinder head 4 with a Plastic injection 10 provided, which also surrounds the electrical connection 9.
  • the fuel injection valve 2 is not shown by measures such. B. a clamping claw, fixed in the cylinder head 4 and secured against rotation.
  • an annular compensating element 11 is provided for centering and mounting of the fuel injection valve 2.
  • the annular compensation element 11 may also be a support plate installed as an attachment.
  • the compensation element 11 in this case has an approximately V-shaped cross-section and ensures a reliable tolerance compensation of the fuel injection valve 2 in all degrees of freedom.
  • a seal 13 for. B. Teflon® provided which seals the fuel injection valve 2 against the cylinder head 4 of the engine.
  • Fuel injection valves 2 are usually rigidly installed in the cylinder head 4 of internal combustion engines and both fixed and guided by an intermediate sleeve, which connects the fuel injection valve 2 to the fuel rail 6. Lateral offsets of the fuel injection valve 2 can be compensated. If the fuel injection valve 2, however, be installed without intermediate sleeve, the tolerances must be compensated otherwise. In addition, it is not sufficient to compensate only lateral offsets or tilting. Also, thermal changes during operation of the internal combustion engine must be considered. Furthermore, it is desirable that a replaced and newly inserted into the receiving bore 3 of the cylinder head 4 fuel injection valve 2 no beads 31 (FIG. Fig. 4 ) in the Support surface 24, ie in the shoulder surface 18 of the receiving bore 3 in the cylinder head 4 leaves.
  • Fig. 2 shows a fuel injection valve 2 incorporated in a receiving bore 3 of a cylinder head 4 as a first embodiment of the present invention with a shoulder surface 18 of the receiving bore 3 and with a downstream shoulder surface 16 of the valve housing 14. Both surfaces are second-order hypersurfaces in three-dimensional space and deviate from a planar shape from, wherein the downstream side shoulder surface 16 of the valve housing 14 is constructed so that it forms the concave or the convex counterpart to the adjacent shoulder surface 18 of the receiving bore 3 in the cylinder head 4.
  • the valve housing 14 can be pivoted with respect to the longitudinal axis 26, whereby a tolerance compensation takes place 32 and unnecessary loads are reduced by lateral forces in the material.
  • Fig. 3 shows the definition of an inclination angle ⁇ of the downstream shoulder surface 16 of the valve housing 14 with respect to the longitudinal axis 26 of the fuel injection valve 2, wherein in this second embodiment, the support surface 24, the downstream shoulder surface 16 of the valve housing 14 and the shoulder surface 18 of the receiving bore 3 of the cylinder head 4 are flat surfaces and a normal vector 27 of the support surface 24 is not oriented parallel to the longitudinal axis 26 of the fuel injection valve 2, wherein also the inclination angle ⁇ of the outboard shoulder surface 16 coincident bearing surface 24 with respect to the longitudinal axis 26 of the fuel injection valve 2 results. Further, there is an inclination angle ⁇ between the normal vector 27 and the longitudinal axis 26 of the fuel injection valve 2, which is smaller than 45 °.
  • Fig. 4 shows a bead 31 in the shoulder surface 18 of the receiving bore 3 in the cylinder head 4, which can then come about when the inclination angle ⁇ of the downstream shoulder surface 16 of the valve housing 14 with respect to a longitudinal axis 26 of the fuel injector 2 due to tolerances in the production is slightly larger than At a pronounced bead 31 in the shoulder surface 18 of the receiving bore 3 in the cylinder head 4, it may happen that a replaced fuel injector 2 is fixed therein and thus is no longer pivotable.
  • Fig. 5 shows that a normal vector 28 of the downstream shoulder surface 16 of the valve housing 14 and a normal vector 29 of the shoulder surface 18 of the receiving bore 3 of the cylinder head 4 are not oriented parallel to each other.
  • Fig. 6 shows that the support surface 24 is a partial surface 30 of the shoulder surface 18 of the receiving bore 3 in the cylinder head 4, wherein the partial surface 30 is inclined relative to the shoulder surface 18 of the receiving bore 3 by a third inclination angle ⁇ .
  • the invention is not limited to the illustrated embodiments.
  • the invention for any construction of fuel injection valves 2, for example, for fuel injection valves 2 for injection into the combustion chamber of a self-igniting internal combustion engine, applicable. All features are arbitrarily combinable.

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 (6)

  1. Soupape d'injection de carburant (2) comprenant un boîtier de soupape (14), le boîtier de soupape (14) comprenant au moins une première surface d'épaulement (16) côté sortie, laquelle s'applique sur une deuxième surface d'épaulement (18) d'un alésage de réception (3) dans une culasse (4), une surface d'appui (24) étant définie par les surfaces d'épaulement (16, 18),
    caractérisée
    en ce que la surface d'appui (24) est une hypersurface de second ordre dans l'espace tridimensionnel,
    en ce qu'un premier angle d'inclinaison (α) de la première surface d'épaulement (16) côté sortie du boîtier de soupape (14) est inférieur à un deuxième angle d'inclinaison (β) de la deuxième surface d'épaulement (18) de l'alésage de réception (3) dans la culasse (4), et
    en ce que la surface d'appui (24) est une surface partielle (30) de la deuxième surface d'épaulement (18) de l'alésage de réception (3) dans la culasse (4), la surface partielle (30) étant inclinée d'un angle d'inclinaison (δ) par rapport à la deuxième surface d'épaulement (18) de l'alésage de réception (3) dans la culasse (4).
  2. Soupape d'injection de carburant (2) selon la revendication 1,
    caractérisée
    en ce qu'un premier vecteur normal (27) à la surface d'appui (24) est orienté non parallèlement à un axe longitudinal (26) de la soupape d'injection de carburant (2).
  3. Soupape d'injection de carburant (2) selon la revendication 2,
    caractérisée
    en ce qu'un deuxième vecteur normal (28) à la première surface d'épaulement (16) côté sortie du boîtier de soupape (14) et un troisième vecteur normal (29) à la deuxième surface d'épaulement (18) de l'alésage de réception (3) sont orientés non parallèlement l'un à l'autre.
  4. Soupape d'injection de carburant (2) selon la revendication 2 ou 3,
    caractérisée
    en ce que le vecteur normal (27) à la surface d'appui (24) forme avec l'axe longitudinal (26) de la soupape d'injection de carburant (2) un angle aigu (γ) qui est inférieur à 45°.
  5. Soupape d'injection de carburant (2) selon l'une quelconque des revendications 1 à 4,
    caractérisée
    en ce que la surface d'appui (24) est sphérique et/ou dans une large mesure conique.
  6. Soupape d'injection de carburant (2) selon la revendication 1 ou 5,
    caractérisée
    en ce que la surface d'épaulement (16) du boîtier de soupape (14) est de courbure concave et la surface d'épaulement (18) de l'alésage de réception (3) dans la culasse (4) est de courbure convexe.
EP05807953.4A 2004-12-17 2005-10-07 Soupape d'injection de combustible Expired - Fee Related EP1828594B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004060983.7A DE102004060983B4 (de) 2004-12-17 2004-12-17 Brennstoffeinspritzventil
PCT/EP2005/055094 WO2006063880A1 (fr) 2004-12-17 2005-10-07 Soupape d'injection de combustible

Publications (2)

Publication Number Publication Date
EP1828594A1 EP1828594A1 (fr) 2007-09-05
EP1828594B1 true EP1828594B1 (fr) 2015-10-07

Family

ID=35610162

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05807953.4A Expired - Fee Related EP1828594B1 (fr) 2004-12-17 2005-10-07 Soupape d'injection de combustible

Country Status (6)

Country Link
US (1) US20110094478A1 (fr)
EP (1) EP1828594B1 (fr)
JP (1) JP2008523316A (fr)
CN (1) CN101124399B (fr)
DE (1) DE102004060983B4 (fr)
WO (1) WO2006063880A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2090773B1 (fr) * 2008-02-15 2010-12-08 Continental Automotive GmbH Injecteur à carburant
JP4913174B2 (ja) * 2009-03-30 2012-04-11 愛知機械工業株式会社 インジェクタの取付構造およびシリンダヘッド側部材並びにこれを備える内燃機関
JP5309063B2 (ja) * 2010-03-23 2013-10-09 日立オートモティブシステムズ株式会社 燃料噴射弁
US8516996B2 (en) * 2010-12-01 2013-08-27 Ford Global Technologies Direct fuel injection system for internal combustion engine with conical ring injector isolator
KR101776335B1 (ko) * 2011-12-09 2017-09-08 현대자동차주식회사 Ｃｎｇ 엔진의 독립 연료분사시스템
JP5892231B2 (ja) * 2014-12-15 2016-03-23 トヨタ自動車株式会社 内燃機関
DE102014225988A1 (de) 2014-12-16 2016-06-16 Robert Bosch Gmbh Entkopplungselement für eine Brennstoffeinspritzvorrichtung
DE102014225976A1 (de) * 2014-12-16 2016-06-16 Robert Bosch Gmbh Brennstoffeinspritzvorrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020148446A1 (en) * 1997-06-25 2002-10-17 Karl Gmelin Fuel injection system

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1257486B (de) * 1964-07-06 1967-12-28 Hailwood & Ackroyd Ltd Brennstoffeinspritzduese
DE4443861A1 (de) * 1994-12-09 1996-06-13 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19523243B4 (de) * 1995-06-27 2009-04-02 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen mit einer Spannmutter mit konisch ausgebildeter Ringschulter
DE19853586A1 (de) * 1998-11-20 2000-05-25 Bosch Gmbh Robert Demontagevorrichtung zur Demontage eines Brennstoffeinspritzventils
JP2000170627A (ja) * 1998-12-09 2000-06-20 Isuzu Motors Ltd 燃料噴射ノズルの取付構造
JP2001324021A (ja) * 2000-05-12 2001-11-22 Toyota Motor Corp シール構造及び筒内噴射用燃料噴射弁の燃焼ガスシール構造及び筒内噴射用燃料噴射弁
DE10108467A1 (de) * 2001-02-22 2002-09-05 Bosch Gmbh Robert Befestigungsvorrichtung
JP3567374B2 (ja) * 2001-07-16 2004-09-22 株式会社ボッシュオートモーティブシステム 燃料噴射弁のシール構造
DE10200044A1 (de) * 2002-01-03 2003-07-24 Bosch Gmbh Robert Brennstoffeinspritzventil
JP3997946B2 (ja) * 2002-07-26 2007-10-24 株式会社デンソー 燃料供給装置
DE10338715B4 (de) * 2003-08-22 2014-07-17 Robert Bosch Gmbh Ausgleichselement für ein Brennstoffeinspritzventil
US20070113828A1 (en) * 2005-11-22 2007-05-24 Fonville Carl E Fuel injector isolating and sealing member

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020148446A1 (en) * 1997-06-25 2002-10-17 Karl Gmelin Fuel injection system

Also Published As

Publication number Publication date
CN101124399B (zh) 2010-05-26
EP1828594A1 (fr) 2007-09-05
US20110094478A1 (en) 2011-04-28
DE102004060983A1 (de) 2006-06-22
WO2006063880A1 (fr) 2006-06-22
CN101124399A (zh) 2008-02-13
JP2008523316A (ja) 2008-07-03
DE102004060983B4 (de) 2017-02-02

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