EP2126335B1 - Injecteur avec corps supplémentaire - Google Patents

Injecteur avec corps supplémentaire Download PDF

Info

Publication number
EP2126335B1
EP2126335B1 EP08701473A EP08701473A EP2126335B1 EP 2126335 B1 EP2126335 B1 EP 2126335B1 EP 08701473 A EP08701473 A EP 08701473A EP 08701473 A EP08701473 A EP 08701473A EP 2126335 B1 EP2126335 B1 EP 2126335B1
Authority
EP
European Patent Office
Prior art keywords
injector
additional body
fuel
injector according
additional
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.)
Not-in-force
Application number
EP08701473A
Other languages
German (de)
English (en)
Other versions
EP2126335A1 (fr
Inventor
Friedrich Boecking
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 EP2126335A1 publication Critical patent/EP2126335A1/fr
Application granted granted Critical
Publication of EP2126335B1 publication Critical patent/EP2126335B1/fr
Not-in-force 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding 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
    • 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
    • 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
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8092—Fuel injection apparatus manufacture, repair or assembly adjusting or calibration

Definitions

  • the invention relates to an injector for injecting fuel into a combustion chamber of an internal combustion engine according to the preamble of independent claim 1 and to an injection device with such an injector according to claim 10.
  • Such an injector is from the DE 100 25 984 A known.
  • a fixing device is provided, which has an additional body which adjoins the injector body and which has a support point for engagement with a clamping claw.
  • additional body which adjoins the injector body and which has a support point for engagement with a clamping claw.
  • the invention is therefore based on the object to propose an injector that can be produced with low material costs. Furthermore, the object is to provide an injection device with an inexpensive producible injector.
  • Fig. 1 a trained as a common rail injector injector 1 is shown.
  • the injector 1 is received in a receiving bore 2 of a cylinder head 3 of an internal combustion engine, wherein a tip 4 of a nozzle body 5 protrudes with a nozzle hole arrangement 6 in the combustion chamber 7 of an internal combustion engine.
  • the injector 1 is acted upon in the axial direction in the direction of a receiving bore floor 8, or in the direction of an annular disc 9 resting on the receiving base 8, by a clamping claw 10 with a clamping force (clamping force).
  • the clamping claw 10 is screwed by means of a clamping screw 11 in an internal thread 12 of a fixing hole 13 in the cylinder head 3.
  • the injector 1 comprises the already mentioned nozzle body 5 with a pressure chamber 14 and an adjustable in the axial direction guided nozzle needle 15.
  • On the nozzle body 5 is a throttle plate 16 and on this turn a valve plate 17.
  • an injector body 18 is arranged with an actuator space 19, wherein within the actuator space 19, an electromagnetic actuator 20 is received with a magnetic coil 21 and a magnet armature 22.
  • the armature 22 is formed integrally with a valve piston 23 of a control valve 24.
  • the nozzle body 5, the throttle plate 16 and the valve plate 17, within which the valve piston 23 of the control valve is received axially adjustable, are clamped by means of a nozzle retaining nut 25 which is penetrated in the axial direction of the tip 4 of the nozzle body 5 against the injector body 18.
  • the injector body 18 is provided with an external thread 26, onto which the nozzle clamping nut 25 is screwed.
  • the injector body 18, the throttle plate 16, the valve plate 17 and the nozzle body 5 are defined in relation to each other via not shown pointing in the axial direction of fixing pins.
  • the fuel pressure in a control chamber 27, in which a force acting on the nozzle needle 15 closing spring 28 is received are influenced in a conventional manner, whereby the nozzle needle 15, with its in the drawing plane upper end face 29, the control chamber 27 limited between a closed position in which the nozzle needle 15 abuts a needle seat 30 and the nozzle hole arrangement 6 blocks and an open position in which the fuel flow from the pressure chamber 14 is released through the nozzle hole arrangement 6 into the combustion chamber, are adjusted.
  • the pressure chamber 14 via a supply channel 31 with high pressure supplied fuel.
  • the control chamber 28 is connected via an inlet throttle 32.
  • a flow restrictor 34 is integrated, wherein the flow cross sections of the inlet throttle 32 and the outlet throttle 34 are coordinated such that when open control valve 24, a net outflow of fuel from the control chamber 27 in a low pressure region 35 (FIGS. Actuator 19) results.
  • the injector body 18 is provided with a high-pressure port 36 pointing in the axial direction, via which the supply channel 31 running in the axial direction can be connected to an external supply line 37 for high-pressure fuel.
  • the supply line 37 or a fastening flange 38 of the supply line 37 is clamped in the axial direction against the injector body 18 by means of a clamping nut 39, which is screwed onto an external thread 40 of the high-pressure connection 36.
  • Adjoining the injector body 18 is an additional body 41, which projects beyond the injector body 18 in the axial direction and which extends substantially parallel to the high-pressure port 36 and the section of the supply line 37 shown in the drawing.
  • the additional body 41 is not formed of high-pressure-resistant steel and has no high-pressure channels or spaces.
  • On a plane in the drawing upper end face 42 of the additional body 41 is a support point 43 is formed for the clamping claw 10, which thus acts directly in the axial direction kraftbeauf provided on the additional body 41, which in turn transmits the Pratzkraft on the adjacent in the axial direction of the injector 18.
  • a running in the axial direction of low pressure passage 44 is introduced, which continues within the injector body 18 into the actuator 19, so that when the control valve 24 open a control amount of fuel from the control chamber 27 through the actuator chamber 19 (low pressure region 35) and can flow from there via the low pressure passage 44 in the auxiliary body 41.
  • the additional body 41 is provided for this purpose in a recess 45 with a return port 46, to which a return line 47 is connected, which passes through the clamping claw 10 in the axial direction.
  • an electrical connection 51 is arranged within the recess 45.
  • Fig. 2 shows the auxiliary body 41 in a sectional view, wherein a lateral recess 52 can be seen, within which the supply line 37 is arranged, which is guided in this way almost in the axial direction by the additional body 41. Furthermore, two spaced-apart centering pins 53 protrude into the additional body 41, which are formed on the injector body 18 and thus align the auxiliary body 41 to the injector body 18 in a defined manner.
  • the additional body 41 is provided with three circumferentially spaced-apart guides, which are provided at an angle of approximately 120 ° to each other arranged guides 54, which serve to rest on a peripheral wall 55 of the receiving bore 2 and thus center the injector 1.

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 (10)

  1. Injecteur pour l'injection de carburant dans une chambre de combustion (7) d'un moteur à combustion interne, notamment injecteur à rampe commune, comprenant un corps d'injecteur (18) recevant un actionneur (20) avec un raccord haute pression (36) pour du carburant et avec un corps supplémentaire (41), le corps supplémentaire (41) étant adjacent au corps d'injecteur (18) en un point d'appui (43) pour l'appui contre une griffe de serrage (10),
    caractérisé en ce
    qu'une conduite d'alimentation (37) de l'injecteur (1) conduisant au raccord haute pression (36) est guidée sous forme de composant séparé devant le corps supplémentaire (41) et/ou à travers celui-ci, en particulier axialement à travers un évidement latéral (52).
  2. Injecteur selon la revendication 1, caractérisé en ce que le point d'appui (43) est disposé sur un côté frontal (42) du corps supplémentaire (41) opposé à une pointe d'aiguille de buse de l'injecteur (1).
  3. Injecteur selon la revendication 1 ou 2, caractérisé en ce qu'au moins un moyen d'orientation pour l'orientation du corps supplémentaire (41) par rapport au corps d'injecteur (18) est prévu.
  4. Injecteur selon la revendication 3, caractérisé en ce que le moyen d'orientation est réalisé sous forme d'au moins une goupille de centrage (53).
  5. Injecteur selon l'une quelconque des revendications 3 ou 4, caractérisé en ce que le moyen d'orientation est formé par le raccord haute pression (36) disposé notamment de manière excentrique et/ou par la conduite d'alimentation (37) conduisant au raccord haute pression (36).
  6. Injecteur selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un canal de carburant basse pression (44) est prévu dans le corps supplémentaire (41).
  7. Injecteur selon la revendication 6, caractérisé en ce qu'un raccord de retour (46) pour une quantité de commande de carburant et/ou une quantité de fuite de carburant est prévu sur le corps supplémentaire (41).
  8. Injecteur selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une conduite électrique (49) pour l'alimentation de l'actionneur (20) est guidée à travers le corps supplémentaire (41).
  9. Injecteur selon la revendication 8, caractérisé en ce qu'un raccord électrique (51) pour la connexion de la conduite électrique (49) à une conduite d'alimentation électrique (50) est prévu sur le corps supplémentaire (41).
  10. Dispositif d'injection comprenant un injecteur (1) ayant les caractéristiques de l'une des revendications précédentes, et une griffe de serrage (10) s'appliquant contre le point d'appui du corps supplémentaire (41).
EP08701473A 2007-02-19 2008-01-15 Injecteur avec corps supplémentaire Not-in-force EP2126335B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007008146A DE102007008146A1 (de) 2007-02-19 2007-02-19 Injektor mit Zusatzkörper
PCT/EP2008/050361 WO2008101748A1 (fr) 2007-02-19 2008-01-15 Injecteur avec corps supplémentaire

Publications (2)

Publication Number Publication Date
EP2126335A1 EP2126335A1 (fr) 2009-12-02
EP2126335B1 true EP2126335B1 (fr) 2012-03-14

Family

ID=39488332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08701473A Not-in-force EP2126335B1 (fr) 2007-02-19 2008-01-15 Injecteur avec corps supplémentaire

Country Status (4)

Country Link
EP (1) EP2126335B1 (fr)
AT (1) ATE549509T1 (fr)
DE (1) DE102007008146A1 (fr)
WO (1) WO2008101748A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012205701A1 (de) 2012-04-05 2013-10-10 Robert Bosch Gmbh Anordnung umfassend ein Gehäuseteil einer Brennkraftmaschine, einen Kraftstoffinjektor und eine Spannpratze
DE102012206486A1 (de) 2012-04-19 2013-10-24 Robert Bosch Gmbh Spannpratze zur Festlegung eines Kraftstoffinjektors an einem Zylinderkopf an einer Brennkraftmaschine, Anordnung umfassend eine Spannpratze und Kraftstoffeinspritzsystem umfassend eine Spannpratze

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10025984B4 (de) * 2000-05-25 2014-07-03 Continental Automotive Gmbh Spannmittel zum Einspannen eines Einspritzventils
DE10155678A1 (de) 2001-11-13 2003-05-22 Bosch Gmbh Robert Einspannvorrichtung für ein Kraftstoffeinspritzventil
JP2006037866A (ja) * 2004-07-28 2006-02-09 Nissan Motor Co Ltd 燃料噴射弁の固定構造
DE102005011574A1 (de) * 2005-03-14 2006-09-21 Robert Bosch Gmbh Zwischenelement für ein Brennstoffeinspritzventil
DE602006007839D1 (de) * 2006-08-04 2009-08-27 Continental Automotive Gmbh Befestigungsvorrichtung zur Befestigung eines Brennstoffeinspritzventils an einem Zylinderkopf einer Brennkraftmaschine

Also Published As

Publication number Publication date
WO2008101748A1 (fr) 2008-08-28
DE102007008146A1 (de) 2008-08-21
ATE549509T1 (de) 2012-03-15
EP2126335A1 (fr) 2009-12-02

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