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EP2705245B1 - Distributeur de combustible - Google Patents

Distributeur de combustible Download PDF

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Publication number
EP2705245B1
EP2705245B1 EP12710076.6A EP12710076A EP2705245B1 EP 2705245 B1 EP2705245 B1 EP 2705245B1 EP 12710076 A EP12710076 A EP 12710076A EP 2705245 B1 EP2705245 B1 EP 2705245B1
Authority
EP
European Patent Office
Prior art keywords
cup
support element
fuel
fuel distributor
support
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
EP12710076.6A
Other languages
German (de)
English (en)
Other versions
EP2705245A1 (fr
Inventor
Markus Feigl
Holger UHRIG
Nikolaus Hautmann
Dietmar Uhlenbrock
Martin GOEHNER
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 EP2705245A1 publication Critical patent/EP2705245A1/fr
Application granted granted Critical
Publication of EP2705245B1 publication Critical patent/EP2705245B1/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
    • 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
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/853—Mounting of fuel injection apparatus involving use of quick-acting mechanism, 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/856—Mounting of fuel injection apparatus characterised by mounting injector to fuel or common rail, or vice versa
    • 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 invention relates to a fuel distributor, which is used in particular for fuel injection systems of mixture-compression, spark-ignited internal combustion engines, and a system with a fuel injection valve. Specifically, the invention relates to the field of fuel injection systems designed as medium-pressure systems.
  • a hold-down spring is used, which sits between the fuel rail and the fuel injection valve.
  • the fuel injection valve can be held down in a cylinder head of an internal combustion engine.
  • the fuel injection valve is securely positioned on the cylinder head, wherein neither by the combustion pressure of a combustion chamber nor by vibration accelerations removal of the fuel injection valve may occur from the desired position.
  • an embodiment of the metal fuel distributor strip is required.
  • the fuel distributor has a distributor body, in which a fuel chamber is configured, and at least one support element, wherein on the distributor body at least one cup is provided, on which the support element is arranged, and wherein the support element at least partially forms a support surface at one end of the cup.
  • the support member is carried out in various embodiments in each case as a solid, compact, annular component, which protects mainly the lower end of the cup and is supported there.
  • the fuel distributor according to the invention with the features of claim 1 has the advantage that the use of a hold-down spring or the like with reduced requirements for at least one material that is used to design the fuel distributor, is possible. In particular, it is possible that cost-effective, but only with a surface pressure acted upon materials are used.
  • the measures listed in the dependent claims advantageous developments of the fuel distributor specified in claim 1.
  • the distributor body and the cup are formed from a plastic.
  • the distributor body comprises the cup, so that the cup is an integral part of the distributor body.
  • the distributor body can be designed with several cups as an injection molded part. Due to the design of plastic cost-effective production is possible.
  • the support member is configured as an annular support member, wherein the support member is connected to the end of the cup. Specifically, an annular configuration of the support member allows a uniform force distribution of the hold-down spring on the end of the cup and at the same time a good connection of the support member with the end of the cup.
  • the support element is connected by means of a positive connection with the end of the cup.
  • the positive connection may in this case be configured by a bevel, a step, by a dovetail connection or the like.
  • the support member may also be connected by at least partial injection into the end of the cup with the end of the cup. In this case, it is possible for the positive connection to be designed during the injection.
  • the support member has a plurality of support arms for holding the support member at the end of the cup. There are in this case two or more holding arms are provided which allow reliable attachment of the support member at the end of the cup by, for example, counteracting holding forces are applied by the support arms.
  • the holding arms are each pressed with a bias against an outer side of the cup.
  • the retaining arms can be designed bow-shaped and optionally engage in recesses on the outside of the cup.
  • the holding arms each have a barb, wherein each barb engages behind a provided on an outer side of the cup stage.
  • a latching connection can be configured, which allows easy mounting of the support member on the cup and, among other things, ensures a transport safety.
  • a hold-down spring is provided, which is connected to the support element.
  • the support element may be stamped on the hold-down spring.
  • Fig. 1 shows a system 1 with a fuel distributor 2, a fuel injection valve 3 and a support member 4.
  • the system 1 in this case comprises a hold-down spring 5.
  • the fuel distributor 2 is not necessarily part of the system 1.
  • the system 1, the fuel injection valve 3, the support member 4 and the hold-down spring 5, but not the fuel distributor 2 comprise and are manufactured and sold in this way as a system 1.
  • the fuel distributor 2 may also comprise the support element and optionally also the hold-down spring 5 and be manufactured and distributed to this extent.
  • the system 1 may also be configured as a fuel injection system 1, which comprises the fuel distributor 2, the fuel injection valve 3, the support member 4, the hold-down spring 5 and optionally further components.
  • the fuel distributor 2 and the system 1 are particularly suitable for a fuel injection system which is operated with a medium pressure.
  • a fuel is preferably in a range of 3 MPa to 10 MPa or 30 bar promoted to 100 bar in the fuel distributor 2.
  • the mean pressure may be in the range of 5 MPa to 7 MPa or 50 bar to 70 bar.
  • the fuel distributor 2 according to the invention and the system 1 are also suitable for other applications.
  • the fuel distributor 2 of the first example has a distributor body 10 which comprises a distributor tube 11 and a plurality of cups 12 arranged next to one another on the distributor tube 11.
  • a connection 13 which can be configured in accordance with a high-pressure connection
  • fuel under the medium pressure can be guided into a fuel space 14 provided in the interior of the distributor tube 11.
  • a channel the fuel from the fuel chamber 14 can be guided to the fuel injection valve 3 fixed in the cup 12.
  • an inlet-side end 15 of the fuel injection valve 3 is at least partially inserted into the cup 12.
  • the fuel can be injected at a combustion chamber end 16 of the fuel injection valve 3 via one or more nozzle openings in a combustion chamber of an internal combustion engine.
  • the fuel distributor 2 In the mounted state, the fuel distributor 2 is in a fixed position at a certain distance from the internal combustion engine, not shown.
  • the fuel injection valve 3 is in this case fixed between the cup 12 of the fuel distributor 2 and a cylinder bore of the internal combustion engine.
  • the hold-down spring 5 is biased during assembly, so that a biasing force acts on the fuel injection valve 3, which holds the fuel injection valve 3 against the cylinder head.
  • the fuel injection valve 3 may be held down with a biasing force of about 500 N in the cylinder head.
  • the distributor body 10 of the fuel distributor 2 and the cup 12 are formed from a plastic.
  • the cup 12 is an integral part of the distributor body 10.
  • the distributor body 10 may be configured with the cup 12 as an injection molded part.
  • the support member 4 is arranged on the cup 12, the support member 4 is arranged.
  • the support member 4 forms a support surface 17 at one end 18 of the cup 12th
  • the support element 4 is designed as an annular or partially annular support element 4 and connected to the end 18 of the cup 12.
  • the support element 4 is thus part of the fuel distributor 2 of the first example
  • a main body 20 is provided at the upstream end 15 of the fuel injection valve 3, which receives the hold-down spring 5.
  • the base body 20 may be placed from the inlet end 15 to the rest of the fuel injection valve 3.
  • the base body 20 can be detachably or non-detachably connected to the other components of the fuel injection valve 3.
  • the hold-down spring 5 has an arc portion 21, which serves as a curved contact portion 21 in this embodiment.
  • a contact between the arc portion 21 and the support surface 17 of the support member 4 is formed.
  • the arcuate contact portion 21 can in this case be moved relative to the support surface 17 in order to allow a biasing of the hold-down spring 5.
  • the hold-down spring 5 exerts a hold-down force on the fuel injection valve 3, which causes a correspondingly large counterforce on the support member 4.
  • the support member 4 distributes this force evenly across the end 18 of the cup 12.
  • the surface pressure at the end 18 of the cup 12 is prevented from exceeding the allowable range.
  • Creep of the plastic in the region of the contact point is therefore prevented.
  • the bias of the hold-down spring 5 can be distributed over a large area and the surface pressure can be greatly reduced.
  • a flow of the plastic is prevented and the cup 12 holds, in particular at its end 18, the predetermined shape and the predetermined tolerances.
  • the hold-down spring 5 may be connected to the support element 4.
  • the ring-shaped support element 4 can be directly impressed on the hold-down spring 5.
  • the support member 4 can be fixed to the fuel injector 3 and reach during assembly to the fuel distributor 2 in the position at the end 18 of the cup 12 .
  • the freedom of movement required for the prestressing of the hold-down spring 5 can be achieved here by a suitable design of the support element 4 and / or of the base body 20.
  • the support member 4 may be connected to the hold-down spring 5 and at the same time fixed to the fuel distributor 2.
  • the hold-down spring 5 is biased against the fuel injection valve 3 during mounting.
  • Fig. 2 shows a support member 4 of a system 1 and a fuel distributor 2 according to an embodiment of the invention in a schematic representation.
  • the support member 4 in this case comprises a support ring 23 and a plurality of support arms 23, 24, 25, 26.
  • About the support arms 23 to 26 is a fixing of the support member 4 on an outer side 27 (FIGS. Fig. 1 ) of the cup 12 allows.
  • Possible embodiments of the support arms 23 to 26 are based on 3 and 4 described in more detail.
  • Fig. 3 shows that in Fig. 2 illustrated support member 4 in a schematic sectional view along the designated III cutting line according to a possible embodiment of the invention.
  • arc sections 28, 29, 30 of the holding arms 23, 24, 26 are shown, which are bent to the outside 27 of the cup 12 out.
  • the arcuate portions 28, 29, 30 of the support arms 23, 24, 26 are biased radially outwardly. Accordingly, the holding arm 25 is configured, which also has an arc portion which is biased. In the assembled state, the support element 4 is thus held at the end 18 of the cup 12.
  • 12 recesses, ribs or the like may be provided on the outside 27 of the cup to improve the fixation.
  • Fig. 4 shows that in Fig. 2 shown supporting element 4 in a schematic sectional view along the designated III cutting line according to another possible embodiment of the invention.
  • barbs 31, 32, 33 are provided at the ends of the holding arms 23 to 26, which engage behind a provided on the outer side 27 of the cup 12 stage.
  • the holding arms 23 to 26 are slightly spread out until the barbs 31, 32, 33 and a barb provided on the holding arm 25 hook behind the intended step.
  • an attachment of the support member 4 is given to the fuel distributor 2.
  • Fig. 5 shows a support member 4 and the cup 12 of a fuel distributor 2 in an excerpt, schematic sectional view according to another example not claimed.
  • the support member 4 on a support ring 22, on which the support surface 17 is configured.
  • a plurality of tongues 40, 41 are provided, each engage behind a provided on the outer side 27 of the cup 12 stage 42, 43.
  • the steps 42, 43 are formed in this example by recesses 44, 45 provided on the outside 27 of the cup 12.
  • the support element 4 can first be placed on the end 18 of the cup 12. Subsequently, the tongues 40, 41 can be pressed radially inwards into the depressions 44, 45, so that the engagement of the steps 42, 43 is achieved.
  • the tongues 40, 41 then engage in the depressions 44, 45 provided on the outside 27 of the cup 12.
  • the barbs 32, 33 of the support arms 24, 26 which engage on the outside of the cup 12 provided steps 42, 43 to achieve the attachment.
  • the secure hold of the support member 4 can be achieved on the cup 12 of the manifold body 10 by positive engagement.
  • the positive connection can for example via the tongues 40, 41 or barbs 31, 32, 33 come about.
  • the tongues 40, 41 of the support element 4 can be configured, for example, by notches 40, 41. However, there are also other scratches or the like conceivable.
  • Fig. 6 shows the in Fig. 1 shown fuel distributor 2 in a partial, schematic sectional view corresponding to another example not claimed.
  • the support element 4 is configured as an annular or partially annular support element 4.
  • the support surface 17 is provided for the hold-down spring 5.
  • the cup 12 has at its end 18 a collar 50, which has radially outwardly directed lugs 51, 52 in section.
  • the collar 50 forms a positive connection with the correspondingly configured support element 4.
  • the support member 4 can be injected into the end 18 of the cup 12.
  • the collar 50 can be configured by a spraying process, wherein the support element 4 is positioned at the end 18 during the injection process.
  • Fig. 7 shows the in Fig. 6 shown fuel distributor 2 in a partial, schematic sectional view corresponding to another example not claimed.
  • the annular or partially annular support element 4 has an at least approximately rectangular cross-section.
  • the support element 4 is inserted into a rectangular recess 53 at the end 18 of the cup 12.
  • the collar 50 engages from inside into the support element 4.
  • the attachment between the support member 4 and the cup 12 in this case is preferably carried out by injecting the support member 4 in the end 18 of the cup 12.
  • the connection is made without a positive connection.
  • the support element 4 is preferably formed from a metallic material. As a result, significant deformations can be avoided, in contrast to a conventional plastic even at high surface pressures.
  • a metallic support element 4 can be attached to the distributor body 10 formed of plastic.

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)

Claims (6)

  1. Distributeur de combustible (2), en particulier pour des installations d'injection de combustible de moteurs à combustion interne à allumage par étincelle et compression de mélange, comprenant un corps de distributeur (10) dans lequel est réalisée une chambre à combustible (14), et au moins un élément de support (4), au moins une coupelle (12) étant prévue au niveau du corps de distributeur (10), sur laquelle est disposé l'élément de support (4), et l'élément de support (4) constituant au moins en partie une surface de support (17) au niveau d'une extrémité (18) de la coupelle (12),
    caractérisé en ce que
    l'élément de support (4) présente une bague de support plane (22) qui s'applique contre l'extrémité (18) de la coupelle (12), plusieurs bras de retenue (23, 24, 25, 26) partant de la bague de support (22), lesquels sont pourvus de portions courbes élastiquement flexibles (28, 29, 30) et sont recourbés vers un côté extérieur périphérique (27) de la coupelle (12), de sorte qu'une fixation de l'élément de support (4) au côté extérieur (27) de la coupelle (12) soit possible par le biais des bras de retenue (23, 24, 25, 26).
  2. Distributeur de combustible selon la revendication 1, caractérisé en ce que le corps de distributeur (10) et la coupelle (12) sont formés d'au moins un plastique et l'élément de support (4) est formé d'un matériau métallique.
  3. Distributeur de combustible selon la revendication 1,
    caractérisé en ce que
    l'élément de support (4) est raccordé au moyen d'un engagement par correspondance de formes à l'extrémité de la coupelle (12) et/ou en ce que l'élément de support (4) est raccordé à l'extrémité (18) de la coupelle (12) par injection au moins partielle dans l'extrémité (18) de la coupelle (12).
  4. Distributeur de combustible selon la revendication 1,
    caractérisé en ce que
    le bras de retenue (23-26) est pressé avec précontrainte contre un côté extérieur (27) de la coupelle (12).
  5. Distributeur de combustible selon la revendication 4,
    caractérisé en ce que
    le bras de retenue (23-26) présente une barbe (31-33) qui s'engage par l'arrière avec un épaulement (42, 43) prévu au niveau d'un côté extérieur (27) de la coupelle (12).
  6. Distributeur de combustible selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce
    qu'il est prévu un ressort de maintien vers le bas (5) qui est raccordé à l'élément de support (4).
EP12710076.6A 2011-05-02 2012-03-16 Distributeur de combustible Not-in-force EP2705245B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110075057 DE102011075057A1 (de) 2011-05-02 2011-05-02 Brennstoffverteiler und System mit einem Brennstoffeinspritzventil
PCT/EP2012/054706 WO2012150080A1 (fr) 2011-05-02 2012-03-16 Distributeur de combustible et système comprenant un injecteur de combustible

Publications (2)

Publication Number Publication Date
EP2705245A1 EP2705245A1 (fr) 2014-03-12
EP2705245B1 true EP2705245B1 (fr) 2017-06-14

Family

ID=45875954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12710076.6A Not-in-force EP2705245B1 (fr) 2011-05-02 2012-03-16 Distributeur de combustible

Country Status (5)

Country Link
EP (1) EP2705245B1 (fr)
CN (1) CN103502623B (fr)
DE (1) DE102011075057A1 (fr)
RU (1) RU2606728C2 (fr)
WO (1) WO2012150080A1 (fr)

Family Cites Families (12)

* 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
DE10037133A1 (de) * 2000-07-31 2002-02-14 Volkswagen Ag Kraftstoffverteilerleiste
DE10152421A1 (de) * 2001-10-24 2003-06-18 Bosch Gmbh Robert Befestigungsvorrichtung
RU30167U1 (ru) * 2002-12-15 2003-06-20 Открытое акционерное общество "АВТОВАЗ" Устройство крепления топливной форсунки на профильной топливной рампе двигателя внутреннего сгорания
JP3948461B2 (ja) * 2004-02-17 2007-07-25 マツダ株式会社 エンジン用燃料噴射装置
US7360524B2 (en) * 2004-12-03 2008-04-22 Millenium Industries, Inc. Fuel injector retention clip
DE102005009740A1 (de) * 2005-03-03 2006-09-07 Robert Bosch Gmbh Brennstoffeinspritzvorrichtung
US7765984B2 (en) * 2005-03-03 2010-08-03 Robert Bosch Gmbh Fuel injection valve
EP2199592B1 (fr) * 2007-05-31 2011-10-12 Continental Automotive GmbH Dispositif de fixation pour fixer un injecteur de combustible dans une culasse d'un moteur à combustion
DE102007049357A1 (de) * 2007-10-15 2009-04-16 Robert Bosch Gmbh Brennstoffeinspritzvorrichtung
US7810471B2 (en) * 2008-01-14 2010-10-12 Millennium Industries Two-piece injector cup and method of manufacturing same
CN201347829Y (zh) * 2008-12-09 2009-11-18 奇瑞汽车股份有限公司 一种发动机高压油轨

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102011075057A1 (de) 2012-11-08
RU2606728C2 (ru) 2017-01-10
EP2705245A1 (fr) 2014-03-12
RU2013153131A (ru) 2015-10-27
WO2012150080A1 (fr) 2012-11-08
CN103502623B (zh) 2016-10-12
CN103502623A (zh) 2014-01-08

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