EP2841758B1 - Dispositif comprenant une partie de carter d'un moteur à combustion interne, un injecteur de carburant et une griffe de serrage - Google Patents

Dispositif comprenant une partie de carter d'un moteur à combustion interne, un injecteur de carburant et une griffe de serrage Download PDF

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Publication number
EP2841758B1
EP2841758B1 EP13709135.1A EP13709135A EP2841758B1 EP 2841758 B1 EP2841758 B1 EP 2841758B1 EP 13709135 A EP13709135 A EP 13709135A EP 2841758 B1 EP2841758 B1 EP 2841758B1
Authority
EP
European Patent Office
Prior art keywords
fuel injector
housing part
injector
bore
plate
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
EP13709135.1A
Other languages
German (de)
English (en)
Other versions
EP2841758A1 (fr
Inventor
Henning Kreschel
Kai Sutter
Andreas Rau
Andreas Gruenberger
Wilhelm Christ
Matthias Horn
Thomas Schwarz
Wolfgang Stoecklein
Thomas Pauer
Stephan Amelang
Lorenz Zerle
Andreas Rettich
Markus Rueckle
Marco Beier
Alexander VILLMANN
Philipp Wachter
Sven SIAUW
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 EP2841758A1 publication Critical patent/EP2841758A1/fr
Application granted granted Critical
Publication of EP2841758B1 publication Critical patent/EP2841758B1/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
    • 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 relates to an arrangement comprising a housing part of an internal combustion engine having a bore, a in the bore of the housing part at least partially received fuel injector and a clamping claw, the fuel injector is biased in the direction of its longitudinal axis A against the housing part on their Pratzkraft. Furthermore, the invention relates to a fuel injector for such an arrangement as well as the use of a clamping claw for fixing a fuel injector to a housing part of an internal combustion engine.
  • a fuel injector for internal combustion engines which has a housing which comprises at least two each a pressure chamber enclosing the high-pressure body, which lie against each other via abutment surfaces and are clamped by means of a clamping device.
  • a clamping device In order to ensure a high-pressure-tight connection of the high-pressure body, it is proposed in this document to provide at least one contact surface with a biting edge.
  • the biting edge is intended to cause a particularly favorable surface pressure distribution in the region of the high-pressure seal when clamping the high-pressure body against each other by means of a clamping nut, with the biting edge digging into the end face of the respective other body.
  • the clamping nut has an internal thread and the housing has a corresponding external thread.
  • an injector for injecting fuel into combustion chambers of internal combustion engines which can be fixed by means of a clamping claw on a housing part of an internal combustion engine.
  • the injector is inserted into a bore of the housing part and held in the bore by the force of the clamping claw.
  • the present invention seeks to simplify an arrangement comprising a housing part having a bore, a fuel injector at least partially received in the bore and a clamping claw for fixing the fuel injector on the housing part.
  • the proposed arrangement comprises a housing part of an internal combustion engine having a bore, a in the bore of the housing part at least partially received fuel injector and a clamping claw, the fuel injector in the direction of its longitudinal axis A can be prestressed against the housing part by their Pratzkraft.
  • the fuel injector is supported directly or indirectly on the housing part and the Pratzkraft the Spannpratze causes a high-pressure-tight connection of at least one plate-shaped component of the fuel injector with a nozzle body and / or a holding body of the fuel injector.
  • the clawing force of the clamping claw is therefore not only used to fix the injector on the housing part, but also as a sealing force in order to realize a high-pressure-tight connection of at least one first component with a second component of the injector.
  • the use of a nozzle retaining nut and / or a valve clamping screw is unnecessary, via the screw connection to the injector, an axial force can be generated, which is usually the required high-pressure density Connection of the components causes.
  • the production of the fuel injector is simplified, so that the production costs decrease. For one thing, the number of components is reduced, on the other hand, the structure of the components is simplified because at least one thread is eliminated. Furthermore, a factory leakage test can be omitted.
  • the clamping claw By acting in the longitudinal direction of the injector Pratzkraft the clamping claw can be effected in the region of at least one sealing point depending on the specific configuration of the support of the injector on the housing part a high-pressure-tight seal. It is important to form sealing points in the area of the contact surfaces of two adjacent components.
  • the one component is supported directly or indirectly on the housing part of the internal combustion engine and the other component is acted upon directly or indirectly by the Pratzkraft of the clamping claw.
  • the clamping claw acts together with the housing part of the internal combustion engine for generating the clawing force serving as sealing force.
  • the clamping claw is screwed by means of a fastening screw in the housing part.
  • the bore of the housing part on an obliquely, in particular radially, with respect to the longitudinal axis A of the injector extending support surface for the axial support of the fuel injector.
  • the support surface is further preferably annular. It can also be formed by a radially extending shoulder or a cone-shaped portion of the bore. This has the advantage that a uniform application of force is guaranteed.
  • the injector can also be supported outside the bore on the housing part.
  • the housing part the obliquely, in particular radially, with respect to the longitudinal axis A of the injector extending support surface - and that outside the bore - on.
  • the support surface the above applies.
  • At least one plate-shaped component is a throttle plate and / or a valve plate.
  • the Pratzkraft the clamping claw is then preferably the high-pressure-tight connection of the throttle plate with the valve plate and / or with a nozzle body, which usually rests on the side facing away from the valve plate of the throttle plate.
  • the clawing force of the clamping claw of the high-pressure-tight connection of the valve plate can be used with a holding body, which usually rests on the side of the valve plate facing away from the throttle plate.
  • a holding body which usually rests on the side of the valve plate facing away from the throttle plate.
  • the injector is preferably supported on the housing part of the internal combustion engine via the nozzle body.
  • the nozzle body may have a radial shoulder over which it rests directly or indirectly on a support surface of the housing part.
  • the support surface is preferably designed as an annular surface and preferably formed within the bore, in which the injector is at least partially received.
  • the bore may be formed as a stepped bore in order to realize the annular surface.
  • the further proposed for an inventive arrangement fuel injector is characterized in that it comprises a holding device for temporary or permanent connection of at least one plate-shaped component of the fuel injector with a nozzle body and / or a holding body of the fuel injector.
  • the holding device is preferably detachably connectable to the fuel injector. In this way - at least during transport, ie before the determination of the injector on the housing part of the internal combustion engine - a connection of the components are effected, which is not initially high pressure-tight. Because this requires the Pratzkraft the Spannpratze.
  • the task of the holding device is essentially to connect the individual components captive.
  • the holding device Before the insertion of the injector into the bore of the housing part, the holding device is advantageously removed, since the injector without such a holding device has a smaller space requirement. If the injector is supported on the outside of the housing part, the holding device can also remain permanently connected to the injector and the support of the injector on the housing part can be made indirectly via the holding device. The holding device can serve in this way the radial positional fixation of the injector or individual components of the injector. If the injector is at least partially inserted into a bore of the housing part, preferably the bore serves for the radial support.
  • the holding device comprises at least one sleeve, a clip, a bracket or the like. Both the bracket and the bracket allow a releasable connection of the holding device with the injector.
  • the holding device has at least one latching element which can be brought into engagement with a recess of at least one plate-shaped component, the nozzle body and / or the holding body.
  • the recess is preferably formed on the outer peripheral side of a component of the injector, preferably in the form of a circumferential groove or a circumferential paragraph.
  • a clamping claw for fixing a fuel injector on a housing part of an internal combustion engine wherein the fuel injector is at least partially received in a bore of a housing part and supported directly or indirectly on the housing part, wherein the Pratzkraft the clamping claw for high-pressure-tight connection of at least one plate-shaped component the fuel injector is used with a nozzle body and / or a holding body of the fuel injector.
  • the use of the clawing force of the clamping claw as a sealing force allows a nozzle tension-free design of the fuel injector. In this way, the configuration of the injector can be simplified and at the same time a high-pressure-tight connection of the components of the injector can be achieved. By eliminating the nozzle retaining nut, the production costs can be reduced at the same time.
  • FIG. 1 An inventive arrangement is exemplary of the Fig. 1 refer to.
  • the illustrated arrangement comprises a fuel injector 3, which is received in a bore 2 of a housing part 1 of an internal combustion engine and fixed by means of a clamping claw 4 on the housing part 1.
  • the clamping claw 4 is attached thereto by means of a fastening screw 14 on the housing part 1.
  • the clamping claw 4 exerts an axial force, the so-called Pratzkraft, on the injector 3, which presses the injector 3 against serving as a support surface 9 paragraph of the bore 2.
  • individual components of the injector 3, namely a nozzle body 7, a throttle plate 5, a valve plate 6 and a holding body 8, axially biased against each other.
  • the bias in the axial direction causes the components are connected to each other high pressure tight in the range of sealing points 13, since the Pratzkraft the clamping claw 4 due to a non-existing nozzle lock nut also serves as a sealing force.
  • Another sealing point 13, which is sealed high-pressure-tight over the Pratzkraft the clamping claw 4 is formed between the nozzle body 7 and the support surface 9 of the housing part 1.
  • FIG. 2 An inventive fuel injector is exemplary of Fig. 2 refer to.
  • the fuel injector 3 has no nozzle retaining nut, so that other means for axially biasing a nozzle body 7, a throttle plate 5, a valve plate 6 and a holding body 8 are provided against each other.
  • These means comprise a plurality of holding devices 10, which are sleeve-shaped or clip-like.
  • the clip-type holding devices 10 encompass a component arrangement consisting of nozzle body 7, throttle plate 5, valve plate 6 and holding body 8, so that they ensure cohesion of the component arrangement.
  • the clamps are provided on both sides with latching elements 11, which engage in a recess 12 of the injector 3 designed as a circumferential groove or engage behind a shoulder of the injector 3, so that a positive connection is effected in each case.
  • a sleeve-shaped or pot-shaped holding device 10 is placed on the nozzle body 7 facing away from the end of the injector 3. Due to the cup shape of the holding device 10 is at the same time a contact surface for the plant of the clamping claw (in Fig. 2 not shown) created on the injector 3.
  • the holding device 10 thus serves at the same time as a force transmission member, which the Pratzkraft (see arrows) on the fuel injector 3 transmits.
  • the sleeve-shaped or cup-shaped holding device 10 also has a latching element 11, which in the present case has the shape of a radially inwardly extending collar, which is in engagement with a recess 12 designed as a circumferential groove 12 of the injector. Furthermore, the pot-shaped holding device 10 has a bore 17 for carrying out a feed line 16, which is connected to an inlet channel 15 of the injector 3.
  • the bore 17 is in the present case designed as a stepped bore, so that over the stage a positive connection with the likewise step-shaped supply line 16 can be produced. In this way, a high pressure-tight connection of the feed line 16 to the inlet channel 15 can be effected via the Pratzkraft (see arrows).
  • the connection area thus represents a further sealing point 13.

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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 (6)

  1. Agencement comprenant une partie de boîtier (1) d'un moteur à combustion interne avec un alésage (2), un injecteur de carburant (3) reçu au moins en partie dans l'alésage (2) de la partie de boîtier (1) ainsi qu'une griffe de serrage (4) dont la force d'engagement précontraint l'injecteur de carburant (3) dans la direction de son axe longitudinal (A) contre la partie de boîtier (1),
    caractérisé en ce que l'injecteur de carburant (3) est supporté directement ou indirectement sur la partie de boîtier (1) et la force d'engagement de la griffe de serrage (4) provoque une connexion étanche aux hautes pressions d'au moins un composant en forme de plaque (5, 6) de l'injecteur de carburant (3) à un corps de buse (7) et/ou un corps de retenue (8) de l'injecteur de carburant (3).
  2. Agencement selon la revendication 1,
    caractérisé en ce que l'alésage (2) de la partie de boîtier (1) et/ou la partie de boîtier (1) présente une surface d'appui (9) s'étendant obliquement, notamment radialement, par rapport à l'axe longitudinal (A) en vue du support axial de l'injecteur de carburant (3).
  3. Agencement selon la revendication 1 ou 2, caractérisé en ce qu'au moins un composant en forme de plaque (5, 6) est une plaque d'étranglement (5) et/ou une plaque de soupape (6).
  4. Injecteur de carburant pour un agencement selon l'une quelconque des revendications précédentes, caractérisé en ce que l'injecteur de carburant (3), pour la connexion temporaire ou durable d'au moins un composant en forme de plaque (5, 6) de l'injecteur de carburant (3) à un corps de buse (7) et/ou un corps de retenue (8) de l'injecteur de carburant (3), comprend un dispositif de retenue (10) pouvant être connecté de préférence de manière amovible à l'injecteur de carburant (3).
  5. Injecteur de carburant selon la revendication 4, caractérisé en ce que le dispositif de retenue (10) comprend au moins une douille, une pince, un étrier ou similaire et/ou présente au moins un élément d'encliquetage (11) qui peut être amené en prise avec un évidement (12) d'au moins un composant en forme de plaque (5, 6), du corps de buse (7) et/ou du corps de retenue (8).
  6. Utilisation d'une griffe de serrage (4) pour la fixation d'un injecteur de carburant (3) sur une partie de boîtier (1) d'un moteur à combustion interne, l'injecteur de carburant (3) étant reçu au moins en partie dans un alésage (2) de la partie de boîtier (1) et étant supporté directement ou indirectement sur la partie de boîtier (1), la force d'engagement de la griffe de serrage (4) étant utilisée pour la connexion étanche aux hautes pressions d'au moins un composant en forme de plaque (5, 6) de l'injecteur de carburant (3) à un corps de buse (7) et/ou un corps de retenue (8) de l'injecteur de carburant (3).
EP13709135.1A 2012-04-05 2013-03-14 Dispositif comprenant une partie de carter d'un moteur à combustion interne, un injecteur de carburant et une griffe de serrage Not-in-force EP2841758B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201210205701 DE102012205701A1 (de) 2012-04-05 2012-04-05 Anordnung umfassend ein Gehäuseteil einer Brennkraftmaschine, einen Kraftstoffinjektor und eine Spannpratze
PCT/EP2013/055276 WO2013149799A1 (fr) 2012-04-05 2013-03-14 Dispositif comprenant une partie de carter d'un moteur à combustion interne, un injecteur de carburant et une griffe de serrage

Publications (2)

Publication Number Publication Date
EP2841758A1 EP2841758A1 (fr) 2015-03-04
EP2841758B1 true EP2841758B1 (fr) 2016-05-18

Family

ID=47878069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13709135.1A Not-in-force EP2841758B1 (fr) 2012-04-05 2013-03-14 Dispositif comprenant une partie de carter d'un moteur à combustion interne, un injecteur de carburant et une griffe de serrage

Country Status (5)

Country Link
EP (1) EP2841758B1 (fr)
CN (1) CN104603446B (fr)
DE (1) DE102012205701A1 (fr)
IN (1) IN2014DN07380A (fr)
WO (1) WO2013149799A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012208075A1 (de) * 2012-05-15 2013-11-21 Man Diesel & Turbo Se Injektor für eine Kraftstoffversorgungsanlage einer Brennkraftmaschine sowie Kraftstoffversorgungsanlage
DE102013018177B4 (de) * 2013-11-29 2016-01-28 L'orange Gmbh Kraftstoffinjektormodul sowie Kraftstoffinjektor und Prüfanordnung damit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19705227A1 (de) * 1997-02-12 1998-08-13 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
CN1898046B (zh) * 2003-12-22 2010-12-08 本田技研工业株式会社 构件的成形方法
DE202006002663U1 (de) 2006-02-20 2006-04-13 Robert Bosch Gmbh Kraftstoffinjektor für Brennkraftmaschinen
DE102007008146A1 (de) 2007-02-19 2008-08-21 Robert Bosch Gmbh Injektor mit Zusatzkörper
DE102011078387A1 (de) * 2011-06-30 2013-01-03 Robert Bosch Gmbh Kraftstoffinjektor

Also Published As

Publication number Publication date
IN2014DN07380A (fr) 2015-04-24
WO2013149799A1 (fr) 2013-10-10
CN104603446B (zh) 2018-04-24
DE102012205701A1 (de) 2013-10-10
CN104603446A (zh) 2015-05-06
EP2841758A1 (fr) 2015-03-04

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