EP1780403A2 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

Info

Publication number
EP1780403A2
EP1780403A2 EP06121591A EP06121591A EP1780403A2 EP 1780403 A2 EP1780403 A2 EP 1780403A2 EP 06121591 A EP06121591 A EP 06121591A EP 06121591 A EP06121591 A EP 06121591A EP 1780403 A2 EP1780403 A2 EP 1780403A2
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
connecting sleeve
fuel
cylinder head
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
EP06121591A
Other languages
German (de)
English (en)
Other versions
EP1780403B1 (fr
EP1780403A3 (fr
Inventor
Martin Scheffel
Axel Heinstein
Andreas Glaser
Klaus Ries-Mueller
Stefan Lauter
Rocco Scholz
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 EP1780403A2 publication Critical patent/EP1780403A2/fr
Publication of EP1780403A3 publication Critical patent/EP1780403A3/fr
Application granted granted Critical
Publication of EP1780403B1 publication Critical patent/EP1780403B1/fr
Active 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting

Definitions

  • the invention is based on a fuel injection valve according to the preamble of the main claim.
  • a fuel injection valve wherein a compensation element, which consists of a support body having a dome-shaped support surface is used to compensate for tolerances in the manufacture and in the assembly of the fuel injection valves.
  • the fuel injection valve is supported on this compensating element in a receiving bore of a cylinder head. Since the fuel injection valve rests on the spherical shaped Kalotten survey with a support surface, the fuel injection valve can be mounted to a certain angle to the axis of the receiving bore and firmly into the receiving bore by suitable means such. B. a clamping claw, are pressed.
  • the rigid support body can not be compressed, and it can thus take place no compensation in the axial direction of the receiving bore of the cylinder head. The compensation of tolerances can continue to take place only on the given geometry of the spherical surface.
  • a fuel injector which uses a tubular intermediate piece, which is arranged between the fuel inlet opening of each fuel injection valve and the associated fuel outlet opening to compensate for positional and angular deviations resulting from the manufacturing tolerances and assembly-related tolerances and which with the fuel Inlet opening of the associated fuel injection valve and the fuel outlet opening of the fuel rail sealing and is movably connected within predetermined limits, so that the inlet portion of the fuel injection valve via the intermediate piece on the fuel rail is flexibly mounted.
  • the disadvantage here, however, that two sealed with respective O-rings seal with the resulting disadvantages, such as the resulting costs and the additional risk of leakage arise.
  • the intermediate piece is an additional component, which requires appropriate space, which is particularly at central installation position of disadvantage, since the installation space is very cramped.
  • a fuel injection valve is proposed with a compensating element for supporting the valve in a cylinder head of an internal combustion engine, wherein the compensating element is annular and is disposed between the 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.
  • an additional element namely the support element and the corresponding space are provided for it.
  • the fuel injection valve according to the invention with the characterizing feature of the main claim has the advantage that due to the elongated design of the connection sleeve for the purpose of tolerance compensation this has a low resistance moment and deformed accordingly even at low shear forces.
  • the tolerance compensation is effected in a simple manner and without expensive additional parts.
  • the connecting sleeve preferably has a constriction, which can be arranged at different positions and with different lengths on the connecting sleeve.
  • a constriction which can be arranged at different positions and with different lengths on the connecting sleeve.
  • the fuel injection valve according to the invention therefore brings particular advantages during installation, which is especially true for central installation, and reduced in the production of the number of parts to be assembled.
  • FIG. 1A shows a schematic cross section through a fuel injection valve 1 according to the prior art, which uses an intermediate piece 17 to compensate for manufacturing tolerances and assembly-related tolerances.
  • a combustion chamber 18 of the internal combustion engine is closed by means of a cylinder head 12.
  • the cylinder head 12 has a receiving bore or recess 14 into which a discharge-side end 8 of a fuel injection valve 1 can be inserted.
  • the recess 14 is sealed to a ring seal 19 against the combustion gases of the combustion chamber 18.
  • a recess 20 formed in the cylinder head 12 adjoins the recess 14 and accommodates a flange 21 of the fuel injection valve 1 inserted into the recess 14.
  • the flange 21 rests on a flat support surface 22 of the cylinder head 12 and is pressed against the support surface 22 of the cylinder head 12 by means of a hold-down device designed as a clamping claw 23.
  • the holding force exerted by the clamping claw 23 is greater than the opposing force exerted by the combustion pressure of the combustion gases in the combustion chamber 18, so that the discharge-side end 8 of the fuel injection valve 1 is securely fixed to the cylinder head 12 even at high combustion pressure.
  • a fuel rail 24 is provided.
  • the fuel rail 24 is tubular and extends along an axis 26 oriented perpendicular to the longitudinal axis 25 of the fuel injector 1 and the recess 14 of the cylinder head 12.
  • the fuel rail 24 has at the position of each fuel injector 1 a connecting piece 27, formed in the form of a stepped hollow cylinder and having a guide portion 28 which communicates via a connecting channel 29 with the main channel 30 of the fuel rail 24 in communication.
  • the fuel distributor line 24 has a fuel outlet opening 31 for each fuel injection valve 1. Downstream of the fuel outlet port 31 of the fuel rail 24, the intermediate piece 17 connects, which supplies the fuel to a fuel inlet port 32 at an inlet portion 33 of the fuel injection valve 1.
  • the intermediate piece 17 has an upstream, tapered portion 34 which is insertable into the guide portion 28 of the connecting piece 27 and is sealed by a designed as an O-ring first sealing member 35 relative to the connecting piece 27 of the fuel rail 24.
  • the upstream tapered portion 34 of the intermediate piece 17 is slidable in the guide portion 28 of the connecting piece 27 by the first seal member 35 slides on the inner wall of the guide portion 28 along. Furthermore, that is Intermediate piece 17 with respect to the connecting piece 27 pivotable within predetermined limits, wherein the pivoting gap between the gap between the upstream tapered portion 34 of the intermediate piece 17 and the guide portion 28 of the connecting piece 27 is compensated by the first sealing member 35.
  • the intermediate piece 17 further has a downstream portion 36, on the inner diameter of a guide portion 37 is formed for the inlet portion 33 of the fuel injection valve 1.
  • the inlet section 33 has a second sealing element 38 designed as an O-ring, which seals the gap distance between the downstream section 36 and the inlet section 33 of the fuel injection valve 1.
  • the inflow portion 33 is also slidable in the guide portion 37 by the second seal member 38 slides on the inner wall of the downstream portion 36 of the intermediate piece 17 along.
  • the inlet section 33 is pivotable with respect to the intermediate piece 17 within predetermined limits, wherein the sealing element 38 is slightly deformed during pivoting and compensates for the change in the gap distance between the downstream portion 36 of the intermediate piece 17 and the inlet portion 33 of the fuel injection valve 1.
  • Fig. 1B shows a schematic partial cross section through another fuel injection valve 1 according to the prior art, which has a standard length.
  • the fuel injection valve 1 shown in Fig. 1B is designed in the form of a direct-injection fuel injector, which is used for direct injection of fuel into a combustion chamber of a spark-ignited internal combustion engine, not shown in particular, in a valve seat of a cylinder head.
  • the fuel injection valve 1 has at an inlet end 2 a plug connection to a receiving socket of a fuel distributor line 3, which is sealed by a gasket 4 between the fuel distributor line 3 and a supply nozzle 5 of the fuel injection valve 1.
  • the fuel injection valve 1 has an electrical connection 6 for an electrical contact for actuating the fuel injection valve 1.
  • the fuel injection valve 1 according to the invention is shown in Fig. 2, which also at a supply end 2, a plug connection to a receiving socket of a fuel distribution line 3, which is not shown here, has.
  • a gasket 4 is provided on a supply pipe 5 to seal the fuel injection valve 1.
  • the fuel injection valve 1 according to the invention also has an electrical connection 6.
  • the inlet-side end 2 of the fuel injection valve 1 is designed as an elongated tube to provide a low moment of resistance and be deformable under the action of radial forces, whereby manufacturing tolerances are compensated.
  • a discharge-side end 8 of the fuel injection valve can be inserted into a recess of a cylinder head nozzle body 9 is formed.
  • a the inlet-side end of the fuel injection valve 1 forming and running as part of the valve housing connection sleeve 7 is z. B. formed by deep drawing.
  • the connecting sleeve 7 and the electrical connection 6 can continue to be encased with a plastic extrusion.
  • connection sleeves 7 of the fuel injection valve 1 show various embodiments of connection sleeves 7 of the fuel injection valve 1 according to the invention.
  • the connection sleeve 7 can be provided in various forms.
  • a connection sleeve 7 is shown, which has a constriction 10 in a remote from the supply pipe section 5, which extends over about 1/5 of the total length of the connection sleeve 7.
  • Fig. 3B shows a connecting sleeve 7 with constant diameter and constant wall thickness, the diameter, the wall thickness and the length of the connecting sleeve 7 are decisive for the moment of resistance.
  • Fig. 3C is a connection sleeve 7th shown, in which the constriction extends over almost the entire length of the tube.
  • FIG. 3D shows a connection sleeve 7, the z. B. is formed in sections in the form of a bellows or shaft tube.
  • 3E illustrates a connecting sleeve 7, in which the inner tube diameter is constant, but the wall thickness of the connecting sleeve 7 varies over the length thereof.
  • FIG. 3F shows a connection sleeve 7, which is similar to the connection sleeve 7 shown in FIG. 3A, but with the difference that the constriction 10 is provided in a central section and extends over approximately 1/4 of the total length of the connection sleeve 7.
  • connection sleeves 7 of the fuel injection valve 1 are schematic cross sections and partial sections through further embodiments of connection sleeves 7 of the fuel injection valve 1 according to the invention, FIGS. 4A and 4B respectively showing connection sleeves 7, which are designed with different diameter steps, ie. H. the connecting sleeve 7 has different constrictions 10, 11 of different diameters.
  • Fig. 4C shows a connecting sleeve 7, whose shape is characterized by a conical shape.
  • FIG. 4D further shows a ferrule 7 having two oppositely tapered portions 40 separated by a constriction 10 therebetween.
  • FIG. 4E shows a connection sleeve 7 which has a convex section 41.
  • a further alternative embodiment of the connecting sleeve 7 has a concave shape, which is indicated by the dashed line 42 in Fig. 4E.
  • the Embodiments illustrate that in order to reduce the moment of resistance of the connecting sleeve 7, many possibilities are given by a corresponding embodiment of the same; the constriction 10 can be arranged at different positions and with different lengths on the connection sleeve 7; the connecting sleeve 7 can be designed with a constant diameter and a constant wall thickness, the diameter, the wall thickness and the length of the connecting sleeve 7 then being decisive for the moment of resistance or the connecting sleeve 7 can be designed with a constant inner or outer diameter and the wall thickness can vary. In any case, a deformation for tolerance compensation is made possible by the inventive design.
  • the connection sleeve 7 may be made by deep drawing or rotary swaging.
  • FIGS. 5A and 5B show cut-outs of a discharge-side end 8 of the fuel injection valve 1 according to the invention, which show different possibilities for supporting the fuel injection valve 1 in a cylinder head 12.
  • a recess 14 which is provided in the cylinder head 12 for receiving the nozzle body 9 of the fuel injection valve 1, a z. B. at an angle of 45 ° beveled surface 15.
  • the nozzle body 9 of the fuel injection valve 1 also has a beveled at an angle of 45 ° surface 16.
  • the two surfaces 15, 16 are formed congruent shape and abut each other.
  • the fuel injection valve 1 but also directly on a formed in the recess 14 of the cylinder head 12 plane surface 13 rest or be supported.
  • the provision of the tapered surfaces 15, 16, in particular at an angle of 45 °, has the advantage that the fuel injection valve 1 is centered.

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)
EP06121591.9A 2005-10-25 2006-10-02 Soupape d'injection de combustible Active EP1780403B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510051005 DE102005051005A1 (de) 2005-10-25 2005-10-25 Brennstoffeinspritzventil

Publications (3)

Publication Number Publication Date
EP1780403A2 true EP1780403A2 (fr) 2007-05-02
EP1780403A3 EP1780403A3 (fr) 2007-11-21
EP1780403B1 EP1780403B1 (fr) 2016-12-14

Family

ID=37708430

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06121591.9A Active EP1780403B1 (fr) 2005-10-25 2006-10-02 Soupape d'injection de combustible

Country Status (2)

Country Link
EP (1) EP1780403B1 (fr)
DE (1) DE102005051005A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2698526A1 (fr) * 2012-08-13 2014-02-19 Continental Automotive GmbH Dispositif de couplage
EP2700805A1 (fr) * 2012-08-23 2014-02-26 Continental Automotive GmbH Pièce d'extension, soupape d'injection et ensemble de distribution de carburant

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1445474A1 (fr) 2003-01-28 2004-08-11 Siemens VDO Automotive S.p.A. Injecteur de carburant, common rail et système d'injection de carburant
EP1460264A1 (fr) 2003-03-19 2004-09-22 Peugeot Citroen Automobiles S.A. Dispositif d'injection de carburant pour moteur à combustion interne, notamment d'un véhicule automobile

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5074269A (en) * 1991-04-29 1991-12-24 Chrysler Corporation Anti-rotation fuel injector clip
US6598592B2 (en) * 2000-10-04 2003-07-29 Seimens Automotive Corporation Fuel system including a fuel injector internally mounted to a fuel rail
DE10148824A1 (de) * 2001-10-04 2003-04-10 Bosch Gmbh Robert Brennstoffeinspritzventil
US6959695B2 (en) * 2001-10-17 2005-11-01 Robert Bosch Corporation Multi-point fuel injection module
DE10158788A1 (de) * 2001-11-30 2003-06-12 Bosch Gmbh Robert Brennstoffeinspritzanlage
DE10307871A1 (de) * 2003-02-25 2004-09-02 Robert Bosch Gmbh Hochdruckleitung für eine Kraftstoffeinspritzanlage
JP4099668B2 (ja) * 2004-03-29 2008-06-11 株式会社デンソー 燃料噴射弁の取り付け構造およびそれに用いる固定部材

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1445474A1 (fr) 2003-01-28 2004-08-11 Siemens VDO Automotive S.p.A. Injecteur de carburant, common rail et système d'injection de carburant
EP1460264A1 (fr) 2003-03-19 2004-09-22 Peugeot Citroen Automobiles S.A. Dispositif d'injection de carburant pour moteur à combustion interne, notamment d'un véhicule automobile

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2698526A1 (fr) * 2012-08-13 2014-02-19 Continental Automotive GmbH Dispositif de couplage
CN103590948A (zh) * 2012-08-13 2014-02-19 大陆汽车有限公司 联接装置
US10480469B2 (en) 2012-08-13 2019-11-19 Continental Automotive Gmbh Coupling device
EP2700805A1 (fr) * 2012-08-23 2014-02-26 Continental Automotive GmbH Pièce d'extension, soupape d'injection et ensemble de distribution de carburant

Also Published As

Publication number Publication date
EP1780403B1 (fr) 2016-12-14
EP1780403A3 (fr) 2007-11-21
DE102005051005A1 (de) 2007-04-26

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