EP1888912B1 - Systeme de raccordement - Google Patents

Systeme de raccordement Download PDF

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Publication number
EP1888912B1
EP1888912B1 EP06721183A EP06721183A EP1888912B1 EP 1888912 B1 EP1888912 B1 EP 1888912B1 EP 06721183 A EP06721183 A EP 06721183A EP 06721183 A EP06721183 A EP 06721183A EP 1888912 B1 EP1888912 B1 EP 1888912B1
Authority
EP
European Patent Office
Prior art keywords
connection system
hold
connection
fuel
inflow
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
EP06721183A
Other languages
German (de)
English (en)
Other versions
EP1888912A1 (fr
Inventor
Martin Scheffel
Andreas Eckbauer
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 EP1888912A1 publication Critical patent/EP1888912A1/fr
Application granted granted Critical
Publication of EP1888912B1 publication Critical patent/EP1888912B1/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
    • 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

Definitions

  • the invention is based on a connection system for a fuel injection valve to be inserted into a receiving bore in a cylinder head according to the preamble of claim 1 (US Pat. U.S. Pat. No. 5,499,612 ).
  • a fastening device for fastening a fuel injection valve for direct injection of fuel into the combustion chamber of a Brennkraflmaschine comprising a hold-down, which is fitted on the fuel injection valve, wherein the hold-down is formed as a flat member and on a fuel injection valve engaging sleeve, the Tolerance compensation when installing the fuel injector serves, supported.
  • the hold-down is tightened by a corresponding tool so tight that the fuel injection valve is not pushed out by the pressure prevailing in the combustion chamber of the engine pressure from the cylinder head.
  • a disadvantage of the known fastening device is in particular the bracing effect of the clamping claw on the fuel injection valve.
  • the force flow generated in the fuel injection valve leads to deformations and thus to changes in the stroke of the valve needle to jamming and to a pressure or bending load of the housing parts, which are generally thin-walled and welded together at several points.
  • each fastening measure leads, for example by a support collar to increase the radial extent of the fuel injection valve and thus to an increased space requirement during installation.
  • the tolerance compensation between the injection valve and the fuel rail is realized by forcibly pulling the pipe to the desired position, causing deformation of the pipe.
  • the forces acting on the injection valve transverse forces are absorbed by the injection valve.
  • the high forces acting on the fuel injection valve can cause the fuel injection valve to be pressed into the receiving bore of the cylinder head so strongly that beads form and the fuel injection valve settles in these beads, which makes further tolerance compensation due to lack of mobility in the cylinder head more difficult.
  • connection system for a fuel injection valve to be inserted into a receiving bore in a cylinder head for connection to a fuel distributor line which comprises a connection to a pipeline leading to a fuel reservoir, with a connection part for connection to the pipeline and the characterizing features of the main claim has the Advantage that when installed on the fuel injection valve no excessive lateral forces act, damaging the valve.
  • the necessary tolerance compensation is carried out on the one hand on the connecting part to the pipe by the spherical end piece according to the invention can be before the tightening of the nut perpendicular to the plane in which the pipe is moving, and thus allows a transversal free installation.
  • a movement of the pipeline along its course caused by axial forces causes elastic or plastic deformation as soon as the pipeline can no longer absorb these axial forces along its course.
  • Fig. 1 shows a side view in a sectional view of a portion of a connection system 1 according to the invention, la for connecting a fuel distributor line 4 to a leading to a fuel reservoir not shown piping. 6
  • connection system 1, 1a for a fuel injection valve 2 to be inserted into a receiving bore in a cylinder head for connection to a fuel distributor line 4, which has a connection 5 to one to a fuel reservoir leading pipe 6, with a connecting part 7 for connection to the pipe 6 is characterized in that a hold down claw 8 at its first end 9 has an elongated opening 10 for receiving a connected to the inlet end of the fuel injection valve fitting 11 to the fuel rail 4 and that the connecting part 7 to the pipe 6 has a pipe fitting 12 with an end piece 13.
  • the end piece 13, which may be formed as a spherical rotary member is before tightening a union nut 23 perpendicular to the direction 37, in which the pipe 6 extends, movable, occurring manufacturing tolerances are compensated.
  • the pipe 6 is free of force with respect to the directions 35, 36 which are perpendicular to the direction 37, in which the pipe 6 extends, mounted on a flange 26 at the inlet end 24 of the fuel manifold 4.
  • the end piece 13 may be embodied in a further embodiment as a rotating part, which deviates from the full spherical symmetry and at its inflow end 29 an inlet-side spherical surface 31 and at its outlet end 30 has a drain-side spherical surface 32, wherein the radii 33, 34 of the inflow-side spherical surface 31 and the drain-side spherical surface 32 are different.
  • the combination of the two connection systems 1, 1a according to the invention causes the connection system 1, 1a to be free of lateral force, which means that the installed fuel injection valve 2 does not receive any forces due to the given manufacturing tolerances of the individual components.
  • Fig. 2 shows a plan view of a part of a connection system 1, 1a according to the invention.
  • a union nut 23, which is part of a necessary for the connection of a fuel rail 4 to a pipe 6 pipe fitting 12 is tightened after the manufacturing tolerances are compensated by the fact that the spherical end piece 13 is displaced so that the fuel injection valve 2 and the fuel rail 4 no Forces more perpendicular to the course of the not shown fuel reservoir leading pipe 6 receives.
  • the arrows 35 and 36 illustrate the directions in which the spherical end piece 13 can be moved for tolerance compensation before tightening the nut 23.
  • Fig. 3 shows a partial section of a portion of a connection system 1, 1a for connecting a fuel distributor line 4 to a not shown fuel reservoir leading pipe 6.
  • the necessary for pipe fitting 12 has a union nut 23, which forms the partially spherical end piece 13 in a cone-shaped Seat 25 presses.
  • the cone-shaped seat 25 limits the inlet-side end 24 of the fuel distributor line 4, which is formed in the form of a flange 26 which forms the inlet to the fuel distributor line 4.
  • the union nut 23, the end piece 13 and the cone-shaped seat 25, which is arranged at an inflow-side end 24 of the fuel distributor line 4, form a frictional connection.
  • Fig. 4 shows a partial section of a second embodiment of a portion of a connection system 1, 1A for connecting a fuel distribution line 4 to a leading to a fuel reservoir not shown pipe 6.
  • the inflow-side end 24 of the fuel distribution line 4 is formed in the form of a recess 27, in which the at least partially spherical end piece 13 is inserted and in which the end piece 13 for tolerance compensation along the directions 35 and 36 can be moved back and forth before it is fixed by means of a flat blank holder 28 which is placed around the terminal and the end piece 13 and with at least two screws 38, 39 is screwed into the fuel distributor line 4.
  • the screws 38, 39 are preferably arranged symmetrically to a longitudinal axis 40 of the recess 27. If the screws 38, 39 are tightened on the fuel distributor line 4, the end piece 13 is pressed onto the cone-shaped seat 25, which delimits the recess 27 of the inlet-side end 24 of the fuel distributor line 4.
  • Fig. 5 shows a side view of a hold down claw 8 in a perspective view, which is part of a connection system 1, 1a according to the invention for connecting a fuel distributor line 4 to a fuel injection valve 2.
  • the hold-down claw 8 is a bent and stamped component made of sheet metal, which is screwed with at least one screw 41 on a not-shown end face of the cylinder head.
  • the holding-down claw 8 has an elongate opening 10 which completely encloses the inlet-side connecting piece 11 provided with an external thread 42 to the fuel distributor line 4. On the provided with the external thread 42 fitting 11 of the female thread 43 provided with a pipe connection 44 is placed and screwed.
  • the manufacturing tolerances in the direction 37 which is parallel to the course of the fuel reservoir leading to the pipe 6 by the fuel injection valve 2 is displaced in the elongated opening 10 of the hold down claw 8 by a small length along a longitudinal axis 18 of the elongated opening 10
  • This translational movement of the fuel injector 2 along the longitudinal axis 18 of the elongated opening 10 constitutes a rotational movement of the fuel injector 2 with respect to the cylinder head seal 45, causing the inventive port system 1, 1a transversely and non-restraint installation of the fuel injector 2 into one further illustrated receiving bore of the cylinder head allows.
  • Fig. 6 shows a plan view of a holding down claw 8, which is part of a connection system 1, 1a according to the invention for connecting a fuel distributor line 4 to a fuel injection valve 2, wherein in this Fig. Side of the plug connection 21 for the electrical contacting is clear.
  • the hold-down claw 8 is fixed with a screw 41 on the cylinder head not shown.
  • the elongated opening 10 at a first end 9 of the hold-down clamp 8 fixes the inlet-side connecting piece 11 provided with an external thread 42, which is inserted into the fuel injection valve 2 for connection to the fuel distributor line 4.
  • the connection of the fuel injection valve 2 to the fuel rail 4 is made by fitting the pipe fitting 44 provided with an internal thread 43 with the tolerance compensation 48 in a direction parallel to the pipe joint 44 by shifting the fuel injection valve 2 to the fitting-side fitting 11 and screwing it becomes.
  • the diameter of the elongated opening formed by a partial circle 14 and two secants 15 10 perpendicular to a longitudinal axis 18 of the hold-down claw 8 extending corresponds to the spanner size 49 of the wrench to be applied for screwing. This diameter corresponds to the distance between the parallel secants 15, which run parallel to the longitudinal axis 18 of the hold-down claw 8.
  • a further embodiment of the elongate opening 10 extends to a partial ellipse and two secants running parallel to their large semiaxis.
  • the partial ellipse and the Both secants define the circumference 17 of the elongated opening 10 with the major half axis and the longitudinal axis 18 of the hold down claw 8 coinciding.
  • a second end 20 of the hold-down claw 8 rests on a not-shown end face of the cylinder head, wherein at the second end 20 of the hold-down claw 8 at least one opening 22 is provided, which receives the screw 41, the second end 20 of the hold down claw 8 at the Not shown end face of the cylinder head fixed.
  • Fig. 7 shows a partial view of a hold-8 with fuel injector 2 in a perspective view
  • the hold-8 is part of the connection system 1, la according to the invention for the connection of a fuel distributor line 4 to a fuel injection valve 2.
  • the plug connection 21 can be seen, which enables electrical contacting of the fuel injection valve 2.
  • the pipe connection 44 is placed on the inserted into the fuel injection valve 2, inlet side, tubular fitting 11 and not yet screwed completely, so that the fuel injection valve 2 in the provided in the hold 8 elongated opening 10 to compensate for manufacturing tolerances parallel to the longitudinal axis 18 of the hold 8th can be moved.
  • Fig. 8 shows a perspective view of an overall view of a hold-8 with fuel injector 2, which is part of a connection system 1, la according to the invention for connecting a fuel distributor line 4 to a fuel injection valve 2.
  • the pipe connection 44 is placed and screwed onto the inserted into the fuel injector 2 tubular fitting 11 after the fuel injection valve 2 has been moved in the elongated opening 10 to compensate for manufacturing tolerances parallel to the longitudinal axis 18 of the hold 8.
  • Fig. 9 shows a perspective view of a partial view of a hold-8 with fuel injector 2, which is part of the connection system 1, 1a according to the invention for connecting a fuel distributor line 4 to a fuel injection valve 2.
  • the elongated opening 10 in the holding-down claw 8 surrounds the tubular, provided with an external thread 42 inlet-side fitting 11, which in the inlet end of the Fuel injection valve 2 is inserted.
  • At a second end 20 of the hold down claw 8 there is at least one opening for receiving a screw 41, which fixes the hold-down claw 8 with its second end 20 on a non-illustrated end face of the cylinder head.
  • Fig. 10 shows an overall view of an inlet-side, tubular fitting 11, which connects the fuel injection valve 2 to the fuel rail 4.
  • the tubular inlet-side fitting 11 is provided at its upstream end with an external thread 42 and is inserted with its downstream end in the inflow-side end of the fuel injection valve 2, after a ring 46 whose diameter is dimensioned so that it over the external thread 42 of the tubular , inflow-side connecting piece 11 can be pushed, is welded below the external thread 42.
  • Fig. 11 shows a section through a to be screwed to the tubular, inlet-side connector 11 pipe connection 44 to the fuel rail 4.
  • the pipe connection 44 has an internal thread 43 and is inserted with its outlet end to the tubular inlet-side connector 11 and screwed.
  • the inlet-side end 47 of the pipe connection 44 leads to the fuel distributor line 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)

Claims (18)

  1. Système de raccordement (1, 1a) pour une soupape d'injection de carburant (2) à insérer dans un alésage de réception dans une culasse, en vue du raccordement à une conduite de distribution de carburant (4), qui comprend un raccord (5) à une conduite tubulaire (6) conduisant à un réservoir de carburant, avec une pièce de connexion (7) pour la connexion de la conduite tubulaire (6),
    ainsi qu'avec un tube de connexion entre la conduite de distribution de carburant (4) et la soupape d'injection de carburant (2), la soupape d'injection de carburant (2) étant pourvue du côté de l'afflux d'un raccord tubulaire (44) comprenant un élément de raccordement (11),
    caractérisé en ce
    qu'une griffe de maintien (8) présente au niveau de sa première extrémité (9) une ouverture allongée (10) pour recevoir l'élément de raccordement (11) à la conduite de distribution de carburant (4), connecté à l'extrémité du côté de l'afflux de la soupape d'injection de carburant (2),
    en ce que l'élément de raccordement (11) est enfoncé dans la soupape d'injection de carburant (2) et est pourvu à son extrémité du côté de l'afflux d'un filetage externe (42), et le raccord
    tubulaire (44) est connecté par vissage à l'élément de raccordement (11) avec un filetage interne (43),
    et en ce que la pièce de connexion (7) à la conduite tubulaire (6) présente un vissage tubulaire (12) avec un embout (13), l'embout (13) étant sphérique ou présentant, à une extrémité du côté de l'afflux (29), une surface sphérique du côté de l'afflux (31), et à une extrémité du côté de la sortie (30), une surface sphérique du côté de la sortie (32).
  2. Système de raccordement selon la revendication 1,
    caractérisé en ce que le système de raccordement (1, 1a) est exempt de forces transversales.
  3. Système de raccordement selon la revendication 1,
    caractérisé en ce que la griffe de maintien (8) est un composant recourbé.
  4. Système de raccordement selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que la griffe de maintien (8) se compose de tôle.
  5. Système de raccordement selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce que la griffe de maintien (8) est un composant estampé.
  6. Système de raccordement selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que l'ouverture (10) est bordée par un cercle partiel (14) et deux sécantes (15).
  7. Système de raccordement selon la revendication 6,
    caractérisé en ce que les deux sécantes (15) sont orientées parallèlement à un axe longitudinal (18) de la griffe de maintien (8).
  8. Système de raccordement selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce qu'une périphérie (17) de l'ouverture allongée (10) de la griffe de maintien (8) est formée à partir d'une ellipse partielle et de deux sécantes s'étendant parallèlement à leur grand demi-axe, le grand demi-axe et l'axe longitudinal (18) de la griffe de maintien (8) coïncidant.
  9. Système de raccordement selon l'une quelconque des revendications 1 à 8,
    caractérisé en ce qu'une deuxième extrémité (20) de la griffe de maintien (8) repose sur un côté frontal de la culasse.
  10. Système de raccordement selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu'il est prévu au moins une ouverture (22) à une deuxième extrémité (20) de la griffe de maintien (8), pour la fixation de la griffe de maintien (8) au moyen d'une vis (41) au côté frontal de la culasse.
  11. Système de raccordement selon la revendication 1,
    caractérisé en ce que le vissage tubulaire (12) présente un écrou d'accouplement (23).
  12. Système de raccordement selon l'une quelconque des revendications 1 à 11,
    caractérisé en ce que l'écrou d'accouplement (23), l'embout (13) et un siège (25), qui est disposé à une extrémité du côté de l'afflux (24) de la conduite de distribution de carburant (4), forment une connexion par engagement par force.
  13. Système de raccordement selon la revendication 12,
    caractérisé en ce que l'extrémité du côté de l'afflux (24) de la conduite de distribution de carburant (4) est réalisée en forme de bride (26).
  14. Système de raccordement selon la revendication 12,
    caractérisé en ce que l'extrémité du côté de l'afflux (24) de la conduite de distribution de carburant (4) est réalisée en forme d'évidement (27).
  15. Système de raccordement selon l'une quelconque des revendications 12 à 14,
    caractérisé en ce que le siège (25) à l'extrémité du côté de l'afflux (24) de la conduite de distribution de carburant (4) est réalisé en forme de cône.
  16. Système de raccordement selon la revendication 14,
    caractérisé en ce que l'embout (13) est fixé au moyen d'une pièce de maintien plate (28) et d'au moins deux vis (38, 39) dans l'évidement (27) de la conduite de distribution de carburant (4).
  17. Système de raccordement selon la revendication 12,
    caractérisé en ce que l'embout (13) est une pièce rotative.
  18. Système de raccordement selon la revendication 1,
    caractérisé en ce que la surface sphérique du côté de l'afflux (31) et la surface sphérique du côté de la sortie (32) présentent des rayons différents (33, 34).
EP06721183A 2005-05-25 2006-03-27 Systeme de raccordement Expired - Fee Related EP1888912B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005024053A DE102005024053A1 (de) 2005-05-25 2005-05-25 Anschluss-System
PCT/EP2006/061050 WO2006125686A1 (fr) 2005-05-25 2006-03-27 Systeme de raccordement

Publications (2)

Publication Number Publication Date
EP1888912A1 EP1888912A1 (fr) 2008-02-20
EP1888912B1 true EP1888912B1 (fr) 2010-06-02

Family

ID=36384492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06721183A Expired - Fee Related EP1888912B1 (fr) 2005-05-25 2006-03-27 Systeme de raccordement

Country Status (5)

Country Link
US (1) US7461638B2 (fr)
EP (1) EP1888912B1 (fr)
JP (1) JP2008542601A (fr)
DE (2) DE102005024053A1 (fr)
WO (1) WO2006125686A1 (fr)

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JP2004360586A (ja) * 2003-06-05 2004-12-24 Mitsubishi Electric Corp 筒内噴射用燃料噴射弁装置
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US7334572B1 (en) * 2007-01-30 2008-02-26 Ford Global Technologies, Llc System and method for securing fuel injectors

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DE102005024053A1 (de) 2006-11-30
JP2008542601A (ja) 2008-11-27
US20070246016A1 (en) 2007-10-25
WO2006125686A1 (fr) 2006-11-30
EP1888912A1 (fr) 2008-02-20
DE502006007103D1 (de) 2010-07-15
US7461638B2 (en) 2008-12-09

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