EP1421273B1 - Element de compensation pour une soupape d'injection de carburant - Google Patents

Element de compensation pour une soupape d'injection de carburant Download PDF

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Publication number
EP1421273B1
EP1421273B1 EP02754193A EP02754193A EP1421273B1 EP 1421273 B1 EP1421273 B1 EP 1421273B1 EP 02754193 A EP02754193 A EP 02754193A EP 02754193 A EP02754193 A EP 02754193A EP 1421273 B1 EP1421273 B1 EP 1421273B1
Authority
EP
European Patent Office
Prior art keywords
compensation element
fuel injection
injection valve
element according
intermediate ring
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
EP02754193A
Other languages
German (de)
English (en)
Other versions
EP1421273A1 (fr
Inventor
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 EP1421273A1 publication Critical patent/EP1421273A1/fr
Application granted granted Critical
Publication of EP1421273B1 publication Critical patent/EP1421273B1/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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/045—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the combustion chamber
    • 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
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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 relates to a compensation element for a fuel injection valve according to the preamble of the main claim.
  • a Brennstöffeinspritzstrom which has a compensating element which consists of a supporting body which has a dome-shaped support surface.
  • a fuel injection valve is supported via this compensating element in a receiving bore of a cylinder head. Since the fuel injection valve rests on the spherical shaped Kalotten specifications with a support surface, the fuel injection valve can be mounted to a certain angular deviation from the axis of the receiving bore and firmly pressed into the receiving bore by suitable means, such as a clamping claw.
  • suitable means such as a clamping claw.
  • the disadvantage is that the support body is expensive to manufacture and requires a precisely manufactured spherical surface.
  • the rigid support body can not be compressed and thus there is no compensation in the axial direction of the receiving bore.
  • the compensation of tolerances can also be done only on the given geometry of the spherical surface. It is not radial to the receiving bore compensation movement possible.
  • JP 11 210885 A describes a gasket having a gasket main body consisting of three layered thin plates. Furthermore, the gasket has a holding member surrounding the gasket main body. Two of the thin platelets have compressible U-shaped or V-shaped cross-sections and are arranged symmetrically with respect to the third thin platelet. Since air layers are formed between the thin plates and the holding member, little heat is transferred from the combustion chamber to a pressure valve or the like inside the fuel injection device.
  • US 5 129 658 A discloses a gasket which defines a cylindrical reinforcement of approximately L-shaped cross-section, the short leg of which defines an annular bearing surface for abutment against an end bearing surface of the injector or injector.
  • An elastomeric seal adheres to the long leg of the reinforcement, which has an inner annular sealing bearing surface which ensures sealing contact with the peripheral surface of the injector or injection carrier.
  • the reinforcement has at least one sealing lip which projects outwardly, which is preferably arranged near the free end of the long leg of the reinforcement and ensures a sealing contact with the cylindrical wall of the housing of the injector in the cylinder head.
  • the compensation element according to the invention for a fuel injection valve with the characterizing features of the main claim has the advantage that an intermediate ring is provided with webs which extend parallel to a valve housing of the fuel injector and in turn are associated with part-circular support segments, which surround the fuel injection valve and thereby provide a spacing in accordance with the force acting on the fuel injection valve forces from a wall of a receiving bore of a cylinder head of an internal combustion engine.
  • the compensation element ensures both a compensation of manufacturing tolerances of the individual components and tolerances that are due to the heating of the fuel injection valve during operation and thus prevents tilting and misalignments.
  • the intermediate ring has a quarter-circle-shaped cross-section and is arranged between the fuel injection valve and the wall of the receiving bore, that the fuel injection valve is flexible in the receiving bore balanced.
  • the intermediate ring can be produced in a simple manner from plastic.
  • the webs may be integrally formed with the intermediate ring or molded onto this.
  • the support segments in their entirety form a circle which completely surrounds the fuel injection valve.
  • the number of support segments is preferably four, which are supported by two or four webs.
  • the webs can be extended and have .. a retaining collar, which allows a fixation of the compensating element on the fuel injection valve.
  • FIG. 1A shows a schematic partial section through a first embodiment of an inventively designed compensating element 1, which is particularly suitable for aligning a fuel injector in a receiving bore of a cylinder head of a mixture-compressing, spark-ignited internal combustion engine.
  • the compensating element 1 is formed in the form of an intermediate ring 2, which has a cross section which corresponds to a quarter circle in the present first embodiment.
  • the intermediate ring 2 is in the assembled state to a not shown in Fig. 1A shoulder of a receiving bore of a cylinder head of an internal combustion engine.
  • webs 3 are formed, which are sprayed on the preferably made of plastic.
  • Intermediate ring 2 molded or can be made in one piece with this.
  • the number in the preferred embodiment is two, support segments 4 are provided, which surround the fuel injection valve in the mounted state of the compensation element 1 and provide for a spacing of the fuel injection valve from a wall 12 of the receiving bore of the cylinder head.
  • the number of Support segments 4 is four in the preferred embodiment.
  • the support segments 4 are formed in the form of quarter circles, so together form a fuel injection valve encompassing circle, which is slotted at equal intervals. Two of the support segments 4 are each connected to one of the webs 3.
  • FIG. 1B shows in a partial sectional view of a second embodiment of an inventively designed compensating element 1.
  • Components that match the embodiment shown in Fig. 1A are provided with matching reference numerals.
  • the second embodiment of a compensating element 1 according to the invention also has an intermediate ring 2, on which webs 3 are formed.
  • webs 3 are formed.
  • four webs 3 are provided, of which two opposing webs 3 are designed as holding webs 3a and slotted webs 3b.
  • the holding webs 3a are extended relative to the webs 3 described in FIG. 1A and provided with a retaining collar 5, which can be used for example by means of clipping onto a shoulder of the fuel injection valve for fastening the compensating element 1 thereto.
  • the retaining collar 5 is designed partially circular and may have a width corresponding to the width of the retaining webs 3a. For better fixation of the compensating element 1, the retaining collar 5 can also be radially widened.
  • the slotted webs 3b are designed to stabilize the support segments 4 and designed so that they are not slotted on a side facing the intermediate ring 2 and are slotted on a side facing the support segments 4 side.
  • each of the quarter-circle-shaped support segments 4 is fixed at one end to one of the retaining webs 3a and at the other end to one of the slotted webs 3b.
  • the support segments 4 are better supported and obtained the shape of the compensating element 1, which in turn allows for easier installation, since the compensating element 1 is not so sensitive to bending or warping during assembly.
  • FIGS. 2A and 2B The installation position and the function of the compensating element 1 according to the invention is shown in more detail in FIGS. 2A and 2B and explained in detail in the following description.
  • the intermediate ring 2 illustrated in FIGS. 1A and 1B which has a cross section corresponding to a quarter circle, can also have a polygonal cross section, as in the detail denoted IC in FIG. 1A, which is shown enlarged in FIG. 1C.
  • the height h of the intermediate ring 2 is variable and can be selected according to the structural conditions of the fuel injection valve and the receiving bore of the cylinder head.
  • Fig. 2A and Fig. 2B show in a cross-sectional view of a compensation element 1 according to FIG. 1A, which is mounted with a fuel injection valve 6 in a receiving bore 11 of a cylinder head 7 of an internal combustion engine.
  • FIG. 2A shows an installation situation in which the compensating element 1 and the fuel injection valve 6 are uniformly spaced from a wall 12 of the receiving bore 11 of the cylinder head 7 or centering of the compensation element 1 and fuel injector 6 total component in the receiving bore 11 is centered.
  • Fig. 2B the situation is shown for example after the connection of the fuel injection valve 6 to a fuel distribution line, not shown, whereby the Fuel injection valve 6 has emigrated and is no longer centered in the receiving bore 11 of the cylinder head 7.
  • the fuel injection valve 6 is designed in the form of a direct-injection fuel injection valve 6 and installed in a cylinder head 7 of an internal combustion engine.
  • the fuel injection valve 6 has, at an inlet-side end 8, a plug-in connection to a fuel distributor line (not shown) which can be sealed, for example, by a seal between the fuel distributor line and a supply nozzle 9 of the fuel injection valve 6.
  • the fuel injection valve 6 has an electrical connection 10 for the electrical contact for actuation of the fuel injection valve 6.
  • the fuel injection valve 6 further has a valve housing 14 and a downstream of this outstanding nozzle body 13. On the nozzle body 13, a seal 15 is arranged, which the seal the cylinder head 7 is used against the combustion chamber of the internal combustion engine.
  • the fuel injection valve 6 has on its valve housing 14 a shoulder 16 which is inclined, for example, at an angle of 45 °. Usually, this shoulder 16 rests against an at least similarly inclined shoulder 17 of the receiving bore 11 of the cylinder head 7. A tolerance compensation between the fuel injection valve 6 and the Aufnalimebohrung 11 is possible only very inadequate.
  • the shoulder 17 is formed at right angles in conjunction with the inventive compensation element 1, so that the intermediate ring 2 of the compensating element 1 rests with its flat side on the shoulder 17 and the part-circular curved side supports the fuel injection valve 6.
  • the compensation element 1 is placed on the shoulder 17 of the cylinder head 7 and attached to the valve housing 14, whereby the previous shoulder connection between the fuel injection valve 6 and the receiving bore. 11 is opened to a distance corresponding to the diameter of the intermediate ring 2 of the compensating element 1.
  • Fig. 2A shows the corresponding installation situation before the connection of the fuel injection valve 6 to the 'not shown fuel distributor line.
  • the position of the intermediate ring 2 allows this to assume an optimal position corresponding to the circumstances, which may for example also lead to the compensating element 1 with the fuel injection valve 6 with respect to a longitudinal axis 18 of the fuel injection valve 6 and the receiving bore 11 may be tilted.
  • the desired tolerance compensation which prevents build up radial stresses and subsequent malfunction of the fuel injection valve 6, for example a tilting of components in the interior of the same occur.
  • the compensating element 1 according to FIG. 1A or FIG. 1B fulfills several functions. On the one hand can be achieved by a spacing of the fuel injection valve 6 from a wall 12 of the receiving bore 11 of the cylinder head 7, a centering of the fuel injection valve 6, the excessive tilting of the fuel injection valve 6, for example in the region Nozzle body 13 of the fuel injection valve 6 counteracts and thus contributes to the sealing effect of a plugged onto the nozzle body 13 sealing ring 15, which seals the cylinder head 7 against the combustion chamber of the engine, not shown, contributes.
  • the compensation element 1 manufacturing tolerances of the individual components, such as the nozzle body 13 or the valve housing 14, which lead to asymmetries in the fuel injector 6, without costly reworking of the components are necessary.
  • temperature-related tolerances that occur, for example, by the heating of the fuel injection valve 6 and the cylinder head 7 during operation of the internal combustion engine can be compensated by the compensation element 1. Tolerances of this kind can, for example, lead to stresses and strains of the connector between the fuel injection valve 6 and the fuel distributor not shown.
  • the fit of the compensating element 1 to the fuel injection valve 6 can be done either by clearance fit or by plug-in.
  • the clearance which allows the compensating element 1 to assume an optimal position in accordance with the prevailing conditions, is particularly suitable for embodiments of compensating elements 1 according to FIG. 1A, while the plug-in fit is particularly easy to implement in compensating elements 1 according to FIG. 1B, since the retaining collar 5 of the retaining webs 3a holds the compensating element 1 on the fuel injection valve 6 and thus in addition to the spacing of the fuel injection valve 6 against the wall 12 of the receiving bore 11 also provide effective protection against the loss of the compensating element 1 during installation and removal of the fuel injector 6.
  • the support segments 4, not shown in FIGS. 2A and 2B, can always ensure optimal spacing of the fuel injection valve 6 from the wall 12 of the receiving bore 11, while the intermediate ring 2 of the compensation element 1 a balanced compensation of taking place at the inlet end 8 of the fuel injection valve 6 Movements as well as caused by heating tolerances allows.
  • the invention is not limited to the illustrated embodiments and, for example, also suitable for compensating elements 1 with differently shaped intermediate rings 2 and more or fewer support segments 4 and webs 3.
  • the invention for any construction of fuel injection valves 6, for example, for fuel injection valves 6 for injection into the Combustion chamber of a self-igniting internal combustion engine, applicable.

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  • 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 (11)

  1. Elément de compensation (1) pour le logement d'un injecteur de carburant (6) dans une culasse (7) d'un moteur à combustion interne, l'élément de compensation (1) ayant la forme d'une bague intercalaire (2) montée entre un boîtier de soupape (14) de l'injecteur de carburant (6) et une paroi (12) d'un alésage de réception (11) de la culasse (7), l'élément de compensation (1) présentant au niveau de la bague intercalaire (2) des entretoises de maintien (3a) qui s'étendent le long du boîtier de soupape (14) et auxquelles sont fixés des segments d'appui (4) qui entourent le boîtier de soupape (14), le boîtier de soupape (14) étant ainsi situé à une certaine distance de la paroi (12) de l'alésage de réception (11),
    caractérisé par
    chaque fois deux entretoises fendues opposées (3b), et les segments d'appui (4) étant respectivement fixés par une extrémité à l'une des entretoises de maintien (3a) et par l'autre extrémité à l'une des entretoises fendues (3b).
  2. Elément de compensation selon la revendication 1,
    caractérisé en ce que
    la bague intercalaire (2) est réalisée par injection de matière plastique.
  3. Elément de compensation selon la revendication 1 ou 2,
    caractérisé en ce que
    les entretoises de maintien (3a) sont injectées sur la bague intercalaire (2) ou sont d'une seule pièce avec celle-ci.
  4. Elément de compensation selon l'une des revendications 1 à 3,
    caractérisé en ce que
    la bague intercalaire (2) présente une section transversale en forme de quart de cercle.
  5. Elément de compensation selon la revendication 4,
    caractérisé en ce que
    la bague intercalaire (2) repose par la courbure en forme de quart de cercle contre un épaulement (16) de l'injecteur de carburant (6), et par l'un des côtés plats contre un épaulement (17) de l'alésage de réception (11) de la culasse.
  6. Elément de compensation selon l'une des revendications 1 à 3,
    caractérisé en ce que
    la bague intercalaire (2) présente une section transversale trapézoïdale ou rectangulaire de hauteur axiale (h).
  7. Elément de compensation selon l'une des revendications 1 à 6
    caractérisé en ce que
    les segments d'appui (4) forment conjointement un cercle.
  8. Elément de compensation selon l'une des revendications 1 à 7,
    caractérisé en ce que
    le nombre d'entretoises de maintien (3a) s'élève à deux.
  9. Elément de compensation selon la revendication 8,
    caractérisé en ce que
    les segments d'appui (4) sont fixés par respectivement une extrémité à l'une des entretoises de maintien (3a).
  10. Elément de compensation selon l'une des revendications 1 à 10,
    caractérisé en ce que
    le nombre d'entretoises de maintien (3a) s'élève à quatre.
  11. Elément de compensation selon la revendication 10,
    caractérisé par
    un collier de maintien (5) formé sur les entretoises de maintien (3a).
EP02754193A 2001-08-20 2002-06-11 Element de compensation pour une soupape d'injection de carburant Expired - Lifetime EP1421273B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10140797A DE10140797A1 (de) 2001-08-20 2001-08-20 Ausgleichselement für ein Brennstoffeinspritzventil
DE10140797 2001-08-20
PCT/DE2002/002122 WO2003018997A1 (fr) 2001-08-20 2002-06-11 Element de compensation conçu pour une soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1421273A1 EP1421273A1 (fr) 2004-05-26
EP1421273B1 true EP1421273B1 (fr) 2006-05-03

Family

ID=7696037

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02754193A Expired - Lifetime EP1421273B1 (fr) 2001-08-20 2002-06-11 Element de compensation pour une soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US6817341B2 (fr)
EP (1) EP1421273B1 (fr)
JP (1) JP4288163B2 (fr)
CN (1) CN100360792C (fr)
DE (2) DE10140797A1 (fr)
WO (1) WO2003018997A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3843915B2 (ja) * 2002-08-29 2006-11-08 株式会社ノーリツ 燃焼装置
DE102005006641A1 (de) * 2005-02-14 2006-08-24 Siemens Ag Einspritzventil zum Einspritzen von Kraftstoff und Zylinderkopf
EP2187035B1 (fr) * 2005-03-03 2013-02-27 Robert Bosch GmbH Dispositif d'injection de carburant
JP3940417B2 (ja) * 2005-07-22 2007-07-04 シャープ株式会社 空気調節装置
JP4546404B2 (ja) * 2006-01-25 2010-09-15 本田技研工業株式会社 エンジンの燃料噴射弁取付け構造
US7334571B1 (en) * 2006-08-31 2008-02-26 Gm Global Technology Operations, Inc. Isolation system for high pressure spark ignition direct injection fuel delivery components
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
DE102007035714A1 (de) 2007-07-30 2009-02-05 Robert Bosch Gmbh Brennstoff-Einspritzanlage mit Ausgleichselement
ATE535706T1 (de) * 2009-05-11 2011-12-15 Continental Automotive Gmbh Kraftstoffeinspritzdüse und kraftstoffeinspritzsystem
US8069842B2 (en) * 2009-07-02 2011-12-06 Robert Bosch Gmbh Injector mounting assembly
US20110265767A1 (en) * 2010-05-03 2011-11-03 Delphi Technologies, Inc. Isolater for fuel injector
DE102014225976A1 (de) * 2014-12-16 2016-06-16 Robert Bosch Gmbh Brennstoffeinspritzvorrichtung
DE102016225706A1 (de) * 2016-12-21 2018-06-21 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
US1970801A (en) * 1932-04-26 1934-08-21 Bosch Robert Fuel injection nozzle for internal combustion engines
US4779594A (en) * 1986-04-25 1988-10-25 Mazda Motor Corporation Intake system for an internal combustion engine
IT1215330B (it) * 1987-01-09 1990-02-08 Piaggio & C Spa Apparato per l'iniezione dicombustibile a bassa pressione in un motore a due tempi.
FR2659115B1 (fr) * 1990-03-02 1992-05-15 Procal Joint d'etancheite pour injecteur de moteur a combustion interne.
DE19735665A1 (de) * 1997-06-25 1999-01-07 Bosch Gmbh Robert Brennstoffeinspritzanlage
JPH11210885A (ja) * 1998-01-20 1999-08-03 Marusan:Kk 積層構造ガスケット
DE19838755B4 (de) * 1998-08-26 2006-11-09 Daimlerchrysler Ag Auf den Brennraum einer Brennkraftmaschine einspritzende Kraftstoffeinspritzdüse
DE19849113A1 (de) * 1998-10-24 2000-05-04 Daimler Chrysler Ag Brennstoffzuführsystem für eine fremdgezündete Brennkraftmaschine
DE19857474A1 (de) * 1998-12-14 2000-06-15 Bosch Gmbh Robert Montagevorrichtung zur Montage und Demontage eines Brennstoffeinspritzventils
US6276339B1 (en) * 2000-05-02 2001-08-21 Delphi Technologies, Inc. Fuel injector spring clip assembly
DE10108467A1 (de) * 2001-02-22 2002-09-05 Bosch Gmbh Robert Befestigungsvorrichtung
DE10109408A1 (de) * 2001-02-28 2002-09-05 Bosch Gmbh Robert Befestigungsvorrichtung

Also Published As

Publication number Publication date
EP1421273A1 (fr) 2004-05-26
JP4288163B2 (ja) 2009-07-01
US20040089270A1 (en) 2004-05-13
CN1466656A (zh) 2004-01-07
US6817341B2 (en) 2004-11-16
DE50206685D1 (de) 2006-06-08
DE10140797A1 (de) 2003-07-31
CN100360792C (zh) 2008-01-09
WO2003018997A1 (fr) 2003-03-06
JP2005500473A (ja) 2005-01-06

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