EP2593658B1 - Injecteur de carburant présentant un nombre réduit de pièces - Google Patents

Injecteur de carburant présentant un nombre réduit de pièces Download PDF

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Publication number
EP2593658B1
EP2593658B1 EP11721475.9A EP11721475A EP2593658B1 EP 2593658 B1 EP2593658 B1 EP 2593658B1 EP 11721475 A EP11721475 A EP 11721475A EP 2593658 B1 EP2593658 B1 EP 2593658B1
Authority
EP
European Patent Office
Prior art keywords
plug
fuel injection
injection valve
rib
housing part
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.)
Active
Application number
EP11721475.9A
Other languages
German (de)
English (en)
Other versions
EP2593658A1 (fr
Inventor
Guenter Wolff
Martin Scheffel
Axel Bormann
Johann Bayer
Sebastian Wieschollek
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 EP2593658A1 publication Critical patent/EP2593658A1/fr
Application granted granted Critical
Publication of EP2593658B1 publication Critical patent/EP2593658B1/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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • 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
    • F02M2200/8015—Provisions for assembly of fuel injection apparatus in a certain orientation, e.g. markings, notches or specially shaped sleeves other than a clip
    • 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
    • F02M2200/8023—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, e.g. clips
    • 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
    • F02M2200/8046—Fuel injection apparatus manufacture, repair or assembly the manufacture involving injection moulding, e.g. of plastic or metal
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials

Definitions

  • the present invention relates to an improved fuel injection valve which has a smaller number of components and a slimmer construction.
  • Fuel injection valves are known in the prior art in various configurations, eg in FIG WO02066818 .
  • One problem with such fuel injection valves are the plugs for electrical connection of the valve and a housing surrounding the valve.
  • the fuel injection valves are encapsulated after assembly, so as to produce the housing and optionally the plug.
  • the plug however, high demands on dimensional accuracy are given to meet the required shaking stresses and provide sufficient tightness against splash water, etc.
  • an injection mold should be as short as possible during the injection process and an injection pressure should be as high as possible.
  • the fuel injection valve according to the invention with the features of claim 1 has the advantage that a molded-on housing part can be sprayed quickly and with not excessive pressure. Furthermore, according to the invention, a very slender and elongated fuel injection valve can be provided and the number of components can be reduced. Furthermore, a plug for an electrical connection of the fuel injection valve has a very high dimensional accuracy.
  • the fuel injection valve comprises an actuator with electrical contact elements, a plug, a fuel supply pipe and a molded housing part.
  • the plug comprises a base body, an electrical connection element, e.g. a bus bar, for an electrical connection to the electrical contact elements of the actuator and a projecting from the base body rib.
  • the molded housing part surrounds the electrical connection element of the plug and is molded onto the rib of the plug and the fuel supply pipe.
  • the rib of the plug is at least partially, preferably completely, surrounded by the housing part.
  • the actuator of the fuel injection valve is preferably a solenoid actuator with a coil on which the electrical contact elements such as a solenoid are mounted. Contact pins or Maisfinnen are arranged. It should be noted that according to the invention a plug can be understood to mean both a protruding plug element and a plug receptacle.
  • the electrical connection element of the plug contacts the contact elements of the actuator directly.
  • This can be on more Intermediate contact elements are dispensed with, whereby the assembly and also an injection process for the housing part can be simplified.
  • a guided out of the connector portion of the electrical connection element is at least four times as long as a plug located in the connector itself region of the electrical connection element.
  • the electrical connection element of the plug comprises at least one support element, which supports the electrical connection element on the fuel supply pipe.
  • the support element is preferably a clip. Depending on a length of the electrical connection element and a plurality of support elements can be provided.
  • a labyrinth is preferably provided between the plug and the molded housing part.
  • a plurality of protruding elements are provided on the plug, which are enclosed by the molded housing in the finished state.
  • the rib of the plug on at least a first mold element, which is surrounded by the molded housing part to achieve a toothing between the rib and the molded housing part.
  • the first mold element is preferably a protruding element or a recess or an element with an undercut.
  • a shape of the protruding element or the recess can be chosen arbitrarily.
  • the projecting element is hemispherical or oval shaped or trapezoidal or otherwise inclined surfaces or convexly protruding or concave protruding.
  • the projecting element can be provided only on one side of the rib or alternatively also on both sides of the rib.
  • a recess may on the one hand be provided like a blind hole or be formed as a passage opening.
  • the shape of the Recess can also be chosen arbitrarily, in particular trapezoidal, concave, as a cylindrical bore, as a slot, or the like, be formed. It should be noted that any number of protruding elements and / or recesses and any combinations are possible.
  • the rib of the plug comprises a second molded part, which is not surrounded by the molded housing part.
  • the second molded part is arranged exposed on the rib and thus not encapsulated by the housing part.
  • the second molded part allows a positioning of the plug in an injection mold for producing the molded housing part and is thus during the injection process with the injection mold in contact. As a result, the second molded part is not encapsulated and is exposed in the finished fuel injection valve.
  • the second molded part allows a safe and easy positioning of the pre-fabricated assembly, comprising the plug and the electrical connection element.
  • the idea according to the invention thus makes possible a separate injection-molding production of plug and housing part, wherein in particular the plug with the electrical connection element can be produced very inexpensively and with the necessary requirements for the plug in a first step.
  • the direct connection of the electrical connection element of the plug to the contact elements of the actuator also allows a small number of components.
  • the fuel injection valve according to the invention is particularly preferably used in a gasoline injection.
  • FIGS. 1 to 6 a fuel injection valve 1 according to a first preferred embodiment of the invention described in detail.
  • the fuel injection valve 1 of the first embodiment comprises a fuel supply pipe 2 with a fitting 10 arranged thereon for supplying fuel. Further, the fuel injection valve 1 comprises a solenoid actuator 3 having a coil 4, an armature 40 and a pole core 41. The armature 40 is connected to a needle 42 which, upon activation of the magnetic actuator 3, releases injection ports to inject fuel. On the coil 4, a contact element 5 is further arranged for an electrical contact.
  • the fuel injection valve is an inwardly opening valve.
  • the fuel injection valve 1 further comprises a plug 6, via which a vehicle-side, electrical contact takes place.
  • the plug 6 is in detail in the Figures 2 and 6 shown.
  • the plug 6 comprises a base body 60 with a rib 61 projecting thereon.
  • the rib 61 protrudes on an underside of the base body 60 and has a flat, substantially rectangular shape.
  • first mold elements in the form of protruding elements 62, 63, 65 and in the form of a recess 64, which is a continuous recess arranged.
  • second mold elements 20, 21 which serve to position the plug 6 in an injection mold for producing a molded housing part 9.
  • FIG. 5 are two parts 24, 25 of an injection mold with inserted plug and inlaid fuel supply pipe 2 shown.
  • the second mold elements 20, 21 are not surrounded by the molded housing part 9 and are thus exposed.
  • the plug 6 comprises in addition to the elongated electrical connection element 7 in the form of two busbars a support element 8.
  • the support element 8 serves to position the plug 6 on the fuel supply pipe 2, wherein the support member 8, two clips 80, 81 are provided.
  • the clips 80, 81 By means of the clips 80, 81, the plug 6 can be easily clipped onto the fuel supply pipe 2 and is thus securely fixed for a subsequent injection process of the housing part 9.
  • the molded housing part 9 does not surround all the components of the fuel injection valve.
  • the rib 61 of the plug 6 is only partially enclosed.
  • the rib 61 is surrounded by the housing part 9 such that a stable and secure connection between the plug 6 and the remaining components of the fuel injection valve is ensured.
  • the plug 6 is first provided as a prepared assembly.
  • the base body 60 and the rib 61 of the plug 6 can already be molded onto the electrical connection element 7 in a first injection molding step.
  • the support member 8 can be molded.
  • the fuel injection valve is then preassembled, with the plug assembly being clipped onto the fuel supply pipe 2 by means of the clips 80, 81.
  • the first and second injection molds 24, 25 are arranged around the pre-assembled fuel injection valve, which means FIG. 5 is apparent.
  • the arrow A indicates that the injection mold 25 still has to be moved toward the other injection mold 24 in the direction of the arrow in order to obtain the final injection state.
  • This creates a cavity 26 between the injection molds 24, 25 and the preassembled components of the fuel injection valve.
  • FIG. 5 it can be seen, between the rib 61 and the fuel supply pipe 2, a distance 12 is present, which is filled after the encapsulation of the material of the housing part 9. The plug is thereby accurately positioned by the second mold elements 20, 21 at corresponding recesses of the injection molds.
  • the molding of the housing part 9 can then take place.
  • the parameters necessary for the housing part 9 for the injection molding in particular in the area of the magnetic actuator, can be set here. Since the electrical connection elements 7 are very long, direct contact with the contact elements 5 of the coil 4 can be made possible.
  • the fuel injection valve 1 according to the invention thus has a narrow and elongated structure, without the need for an excessively large number of components is necessary.
  • FIGS. 7 to 9 preferred alternatives of the fuel injection valve 1 are shown, wherein identical or functionally identical parts are denoted by the same reference numerals as in the first embodiment. How out FIG. 7 is apparent, in this preferred embodiment, a direct contact between the rib 61 and the outer periphery of the fuel supply pipe 2 is present. At the in FIG. 8 shown embodiment, in turn, a distance 12 is present, but the rib 61 is formed differently. At the free end of the rib 61, the two projecting elements 62, 65 are arranged on both sides of the rib 61 in this embodiment.
  • FIG. 9 shows a preferred embodiment in which on the rib 61, two holding portions 67, 68 are arranged, which partially surround the fuel supply pipe 2.
  • the holding elements 67, 68 are resilient, so that the rib can be plugged over the fuel supply pipe 2.
  • the rib 61 in turn rests on the fuel supply pipe 2.
  • first mold elements can be arranged only on one side of the rib 61 and on both sides of the rib 61. If the first form elements are recesses, they may be blind-hole-like or be formed as continuous recesses. With regard to the second mold elements 20, 24, these are preferably provided on both sides of the rib 61. However, it is also possible that only on one side of the rib, a form element is present. It should also be noted that each of a plurality of form elements can be arranged on one side or both sides of the rib 61.
  • an arrangement of the form elements on both sides of the rib 61 may be symmetrical or asymmetrical.
  • a fuel injection valve 1 can be produced in a higher quality, wherein the fuel injection valve 1 in particular has a narrow and slender shape. Also occur less damage to components during spraying of the housing member 9, so that less exclusion is obtained in the production.

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  • 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)

Claims (10)

  1. Soupape d'injection de carburant, comprenant :
    - un actionneur (3) avec un élément de contact électrique (5),
    - un connecteur enfichable (6),
    - un tuyau d'alimentation de carburant (2), et
    - une partie de boîtier surmoulée (9),
    - le connecteur enfichable (6) présentant un corps de base (60), un élément de connexion électrique (7) pour une connexion électrique à l'élément de contact électrique (5) de l'actionneur et une aile (61) faisant saillie depuis le corps de base (60), et
    - la partie de boîtier surmoulée (9) entourant l'élément de connexion électrique (7) du connecteur enfichable et étant surmoulée sur l'aile (61) du connecteur enfichable et sur le tuyau d'alimentation en carburant (2),
    caractérisée en ce que
    l'aile (61) est réalisée de manière à faire saillie depuis le corps de base (60) de telle sorte qu'elle s'étende dans la direction du tuyau d'alimentation en carburant (2), sans être traversée par l'élément de connexion électrique (7).
  2. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que l'élément de connexion électrique (7) du connecteur enfichable (6) vient directement en contact avec des éléments de contact (5) de l'actionneur (3).
  3. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une région de l'élément de connexion électrique guidée hors du corps de base (60) du connecteur enfichable (6) est au moins quatre fois plus longue qu'une région de l'élément de connexion électrique se trouvant dans le corps de base.
  4. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de connexion électrique (7) comprend un élément de support (8) afin de supporter l'élément de connexion électrique (7) sur le tuyau d'alimentation en carburant (2).
  5. Soupape d'injection de carburant selon la revendication 4, caractérisée en ce que l'élément de support comprend au moins un clip (80, 81).
  6. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un labyrinthe est prévu entre le connecteur enfichable (6) et la partie de boîtier surmoulée (9).
  7. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que l'aile (61) du connecteur enfichable (6) présente au moins un premier élément moulé (62, 63, 64, 65) qui est entouré par la partie de boîtier surmoulée (9) afin d'assurer une connexion sûre entre l'aile (61) et la partie de boîtier surmoulée (9).
  8. Soupape d'injection de carburant selon la revendication 7, caractérisée en ce que la première partie moulée comprend un élément saillant et/ou un évidement et/ou un élément avec une contre-dépouille.
  9. Soupape d'injection de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que l'aile (61) du connecteur enfichable (6) présente une deuxième partie moulée (20, 21) qui est disposée de manière exposée sur l'aile (61) afin de permettre un positionnement du connecteur enfichable (6) dans un outil de moulage par injection (24, 25) pour fabriquer la partie de boîtier surmoulée (9).
  10. Soupape d'injection de carburant selon l'une quelconque des revendications 1 à 6, caractérisée en ce que la partie de boîtier surmoulée (9) entoure complètement l'aile (61).
EP11721475.9A 2010-07-13 2011-05-13 Injecteur de carburant présentant un nombre réduit de pièces Active EP2593658B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010031277A DE102010031277A1 (de) 2010-07-13 2010-07-13 Kraftstoffeinspritzventil mit reduzierter Bauteileanzahl
PCT/EP2011/057780 WO2012007201A1 (fr) 2010-07-13 2011-05-13 Injecteur de carburant présentant un nombre réduit de pièces

Publications (2)

Publication Number Publication Date
EP2593658A1 EP2593658A1 (fr) 2013-05-22
EP2593658B1 true EP2593658B1 (fr) 2018-02-28

Family

ID=44303328

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11721475.9A Active EP2593658B1 (fr) 2010-07-13 2011-05-13 Injecteur de carburant présentant un nombre réduit de pièces

Country Status (6)

Country Link
US (1) US9759172B2 (fr)
EP (1) EP2593658B1 (fr)
JP (1) JP5490308B2 (fr)
CN (1) CN103154494B (fr)
DE (1) DE102010031277A1 (fr)
WO (1) WO2012007201A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012204920A1 (de) * 2012-03-27 2013-10-02 Robert Bosch Gmbh Versteiftes Kraftstoffeinspritzventil
DE102012211230A1 (de) * 2012-06-29 2014-01-02 Robert Bosch Gmbh Brennstoffeinspritzventil
KR101691739B1 (ko) * 2015-06-26 2016-12-30 주식회사 현대케피코 차량용 인젝터
DE102016116777A1 (de) 2016-09-07 2018-03-08 Kendrion (Villingen) Gmbh Elektromagnetische Stellvorrichtung insbesondere zum Verstellen von Nockenwellen eines Verbrennungsmotors
GB2555404B (en) * 2016-10-24 2019-04-17 Delphi Tech Ip Ltd Positioning feature of a stator assembly of a fuel injector
DE102016225896A1 (de) * 2016-12-21 2018-06-21 Robert Bosch Gmbh Injektor, Spritzgießwerkzeug sowie Verfahren zur Herstellung eines Injektors
DE102017212971A1 (de) * 2017-07-27 2019-01-31 Robert Bosch Gmbh Montageelement, Montagesatz, Verfahren zum Montieren und Bauteil
DE102017214980A1 (de) * 2017-08-28 2019-02-28 Robert Bosch Gmbh Einspritzventilanordnung
GB2602649B (en) * 2021-01-07 2023-01-04 Delphi Automotive Systems Lux Fuel injector

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1293433B1 (it) * 1997-07-11 1999-03-01 Elasis Sistema Ricerca Fiat Valvola di dosaggio registrabile per un iniettore di combustibile per motori a combustione interna, e relativo metodo di registrazione.
DE10108464A1 (de) * 2001-02-22 2002-09-05 Bosch Gmbh Robert Brennstoffeinspritzventil
JP2004293313A (ja) 2003-03-25 2004-10-21 Hitachi Unisia Automotive Ltd 燃料噴射弁
JP3955055B2 (ja) * 2004-09-27 2007-08-08 株式会社ケーヒン 電磁式燃料噴射弁
DE102004058677A1 (de) * 2004-12-06 2006-06-14 Robert Bosch Gmbh Einspritzventil
JP4897728B2 (ja) * 2008-03-18 2012-03-14 株式会社ケーヒン 電磁式燃料噴射弁

Also Published As

Publication number Publication date
JP5490308B2 (ja) 2014-05-14
CN103154494A (zh) 2013-06-12
JP2013524088A (ja) 2013-06-17
DE102010031277A1 (de) 2012-01-19
WO2012007201A1 (fr) 2012-01-19
EP2593658A1 (fr) 2013-05-22
US9759172B2 (en) 2017-09-12
CN103154494B (zh) 2016-04-27
US20130186986A1 (en) 2013-07-25

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