EP2705241B1 - Distributeur de combustible - Google Patents

Distributeur de combustible Download PDF

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Publication number
EP2705241B1
EP2705241B1 EP20120709849 EP12709849A EP2705241B1 EP 2705241 B1 EP2705241 B1 EP 2705241B1 EP 20120709849 EP20120709849 EP 20120709849 EP 12709849 A EP12709849 A EP 12709849A EP 2705241 B1 EP2705241 B1 EP 2705241B1
Authority
EP
European Patent Office
Prior art keywords
fuel
cup
duct
housing
fuel distributor
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
EP20120709849
Other languages
German (de)
English (en)
Other versions
EP2705241A1 (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
Priority to PL12709849T priority Critical patent/PL2705241T3/pl
Publication of EP2705241A1 publication Critical patent/EP2705241A1/fr
Application granted granted Critical
Publication of EP2705241B1 publication Critical patent/EP2705241B1/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
    • 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
    • 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
    • F02M2200/90—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-compressing, spark-ignited internal combustion engines. Specifically, the invention relates to the field of fuel injection systems designed as medium-pressure systems.
  • a fuel distributor strip which is formed for high pressure applications made of steel or aluminum.
  • a compressive strength for pressures of, for example, up to 20 MPa (200 bar) can be achieved.
  • a rail tube serves as a base on which sit the connections to the injectors, which are also referred to as cups.
  • the cups can hereby sit centrally or slightly eccentrically under the rail tube and be realized by an additional connection hole in a holder.
  • such holders are very elaborate and thus very expensive. Therefore, such a configuration is associated with high manufacturing costs.
  • fuel rail assemblies may be used for low pressure applications at 0.3 MPa (3 bar) to 0.5 MPa (5 bar) for related applications.
  • the scope of such fuel rail for low pressure applications is limited to this low pressure range.
  • a fuel distributor which has a housing in which a fuel chamber is designed, wherein at least one cup is provided, which is arranged eccentrically to the fuel chamber.
  • the cup is connected to the fuel space at least via a channel section of a channel.
  • the channel section is sealed from the environment by a closure provided on the channel.
  • the cup together with the channel portion of the channel, serves to supply fuel to the fuel space of the fuel distributor.
  • Promoted by a pump is later injected via injectors fuel through the cup, which is exactly one inlet port of the fuel distributor, and the channel fed to the fuel chamber of the fuel distributor under pressure.
  • injectors fuel Starting from the fuel chamber of the fuel distributor, in turn, several, here four, connecting and receiving sections are provided, are introduced into the injectors with their inlet ends, which are supplied there namely with the fuel from the fuel chamber.
  • the fuel distributor according to the invention with the features of claim 1 has the advantage that an embodiment with one or more eccentrically seated cups is possible with reduced manufacturing costs. Specifically, this fuel distributor is suitable for medium pressure.
  • the housing is at least substantially formed on the basis of at least one plastic.
  • the manufacturing cost can be reduced.
  • the cup is configured by the housing.
  • the provided cups can be removed from the mold in the desired geometry. This results in a good stability and a reliable seal, which is particularly suitable for medium pressure.
  • the channel is configured in the housing. As a result, additional components can be saved. In addition, the required for the medium pressure seal can be ensured.
  • the fuel space is configured as an elongated fuel space, that an axis of the channel is oriented at least approximately perpendicular to a longitudinal direction of the fuel space and that an axis of the cup is oriented at least approximately perpendicular to the axis of the channel.
  • the cup can be arranged completely eccentrically outside the region of the fuel chamber.
  • the channel can be made by a lateral pull.
  • the axis of the channel is oriented eccentrically to an axis of the fuel space. As a result, the strength can be improved. For reasons of strength, it is also cheaper if the junction between the cup and the channel is designed eccentric.
  • a connecting channel is provided, which opens from the cup in the channel portion and that the connecting channel is at least approximately parallel and eccentric to an axis of the cup configured.
  • the required space can be reduced. It is particularly favorable for reducing the installation space when a taper of the cup and the connecting channel to the fuel chamber are arranged.
  • the connecting channel is in this case configured to be eccentric with respect to the axis of the cup toward the fuel chamber. As a result, the closure can be arranged closer to the fuel chamber.
  • the closure is formed by a screwed into the channel screw plug and a seated at one end of the screw plug seal that seals the channel section.
  • the closure has a lid welded to the housing or a lid glued to the housing.
  • Fig. 1 shows an embodiment of a fuel distributor 1 of the invention in a schematic representation.
  • Fig. 2 shows a schematic section through the in Fig. 1 represented fuel distributor 1 along the section line designated II.
  • the presentation of the Fig. 1 corresponds to a view from the in Fig. 2 with I designated viewing direction.
  • the viewing direction I can be from below on the fuel distributor 1, so that the Fig. 1 shows the fuel distributor 1 in a view from below.
  • the fuel distributor 1 of the exemplary embodiment can be configured in particular in the form of a fuel distributor strip 1.
  • the fuel distributor 1 is particularly suitable for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines.
  • the fuel distributor 1 is suitable for a medium-pressure system.
  • the mean pressure for such a medium-pressure system can be in the range of 3 MPa to 10 MPa or 30 bar to 100 bar.
  • the mean pressure may be in the range of 5 MPa to 7 MPa or 50 bar to 70 bar.
  • the fuel distributor 1 according to the invention is also suitable for other applications.
  • the fuel distributor 1 has a housing 2.
  • the housing 2 is preferably formed essentially of a plastic.
  • the housing 2 may optionally also comprise metal elements, for example a metal bushing, which is inserted into the housing 2 cast or otherwise connected to the housing 2.
  • the housing 2 comprises a rail (rail) 3 and side parts 4, 5.
  • the mechanical stability of the side parts 4, 5 with respect to the strip 3 is hereby improved by ribs 6, 7, of which for simplicity of illustration only the ribs 6, 7 characterized are.
  • the housing 2 comprises a receiving part 8, in which a connecting piece 9 is screwed.
  • the connection piece 9 can have a threaded portion 10, so that a connection for a fuel line corresponding to a high-pressure connection is realized. Via such a connected fuel line fuel can then be guided by a pump in a fuel chamber 11, which is configured in the bar 3 of the housing 2. Specifically, fuel that is under medium pressure can thus be guided into the fuel chamber 11.
  • the fuel distributor 1 has cups 12, 13, which are formed by the housing 2.
  • the cups 12, 13 are in this case formed on the side parts 4, 5 of the housing 2.
  • the cups 12, 13 are thus an integral part of the housing 2. This eliminates the need for separate production of cups and the attachment to the fuel distributor 1. Thus, the number of manufacturing steps is significantly reduced.
  • two cups 12, 13 are provided. This is to be understood as an example. The number of cups 12, 13 can namely be adjusted with respect to the particular application.
  • fastening points 20, 21 are configured, for example by stepped holes.
  • attachment points 20, 21 of the fuel distributor 1 can be connected via suitable fastening means, for example with an engine block of an internal combustion engine.
  • the strip 3 has an axis 22 which extends centrally through the fuel chamber 11.
  • the strip 3 extends in a direction 23 along the axis 22.
  • the direction 23 is in this case parallel to the axis 22.
  • the cups 12, 13 and Attachment points 20, 21 are even completely eccentrically outside of the bar 3, since they are offset in a direction 24 which is perpendicular to the direction 23, with respect to the bar 3 to the outside.
  • the cup 12 is connected via a connecting channel 25 and a channel portion 26 of a channel 27 with the fuel chamber 11.
  • the channel 27 also has a mounting portion 28 into which a closure 29 for closing the channel 27th is used. Through the closure 29, the channel portion 26 of the channel 27 is sealed from the environment.
  • the channel 27 is also configured in the housing 2. Here, the channel 27 extends from the bar 3 in the side part. 4
  • An axis 30 of the channel is oriented perpendicular to the direction 23 in this embodiment.
  • a direction 31 which is parallel to the axis 30 coincides in this embodiment approximately with the direction 24, that is, the directions 24, 31 are at least approximately parallel.
  • the directions 24, 31 can also be rectified, that is to say they are parallel to one another.
  • the axis 30 of the channel 27 is oriented eccentrically to the longitudinal axis 22 of the fuel chamber 11 in this embodiment.
  • the channel portion 26 of the channel 27 opens eccentrically into the elongated fuel space 11. This allows the strength can be improved. This allows greater stability, which is particularly advantageous for a load with the medium pressure, or a more compact design with a smaller wall thickness of the plastic housing 2.
  • the cup 12 has an axis 32 which extends centrally through the cup 12.
  • the axis 32 of the cup 12 is in this case oriented eccentrically to the axis 30 of the channel 27. This is achieved by an offset 33 between the axis 32 of the cup 12 and the axis 30 of the channel 27.
  • the connection point between the cup 12 and the transverse channel 27 is designed eccentrically. This has a favorable effect on the strength of the fuel distributor 1.
  • the connecting channel 25 is at least approximately parallel and eccentric to the axis 32 of the cup 12 configured.
  • the connecting channel 25 opens in this case with respect to the direction 24 and the direction 31 of the channel 27 as close as possible to the fuel space 11.
  • the connecting channel 25 is configured to the fuel chamber 11 towards the eccentric axis 32 of the cup 12.
  • the required space is optimized, so that the space can be set as small as possible. Because in particular the closure 29 can be arranged closer to the strip 3 in this way. Accordingly, the channel section 26 of the channel 27 can thereby be optimally set short. In this case, the cup 12 tapers into the smaller connection channel 25.
  • the closure 29 may be formed by a screwed into the mounting portion 28 of the channel 27 screw plug 35 and a sealing ring 36, wherein the sealing ring 36 is provided at a channel portion 26 facing the end 37 of the screw plug 35.
  • the sealing ring 36 in this case seals off the channel section 26.
  • the closure 29 may also have a welded to the housing 2 or bonded to the housing 2 cover 38.
  • the fuel chamber 11 via the channel portion 26 of the channel 27 and the connecting channel 25 is reliably connected to the cup 12.
  • the connection of the fuel chamber 11 with the cup 13 is designed accordingly.
  • the fuel can be fed to injectors which are connected to the cups 12, 13 with the fuel distributor 1.
  • the fastening points 20, 21 can also serve for fastening the injectors to the fuel distributor 1.
  • the axis 30 of the channel 27 is oriented at least approximately perpendicular to the longitudinal direction 23 of the fuel chamber 11. Further, the axis 32 of the cup 12 is oriented at least approximately perpendicular to the axis 30 of the channel 27.
  • the channel 27 in the housing 2 can be realized by a slider or a Queryak which is closed, for example, in the final assembly by the shutter 29.
  • process steps can be saved, so that the production costs are reduced.

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. Distributeur de carburant (1), en particulier pour des systèmes d'injection de carburant de moteurs à combustion interne à allumage commandé et à compression du mélange, comprenant un boîtier (2) dans lequel est configuré un espace de carburant (11), au moins une coupelle (12, 13) étant prévue, laquelle est disposée de manière excentrique par rapport à l'espace de carburant (11), la coupelle (12, 13) étant reliée à l'espace de carburant (11) au moins par le biais d'une portion de canal (26) d'un canal (27), et la portion de canal (26) étant rendue étanche par rapport à l'environnement au moyen d'un obturateur (29) prévu sur le canal (27),
    caractérisé en ce que
    la coupelle (12, 13) sert respectivement à recevoir un injecteur.
  2. Distributeur de carburant selon la revendication 1,
    caractérisé en ce que
    la coupelle (12, 13) est formée par le boîtier (2).
  3. Distributeur de carburant selon la revendication 1 ou 2,
    caractérisé en ce que
    le canal (27) est configuré au moins partiellement dans le boîtier (2).
  4. Distributeur de carburant selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    le boîtier (2) est réalisé au moins essentiellement à base d'au moins un plastique.
  5. Distributeur de carburant selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce que
    l'espace de carburant (11) est configuré sous forme d'espace de carburant allongé (11), en ce qu'un axe médian (30) du canal (27) est orienté au moins approximativement perpendiculairement à une direction longitudinale (23) de l'espace de carburant (11), et en ce qu'un axe médian (32) de la coupelle (12) est orienté au moins approximativement perpendiculairement à l'axe médian (30) du canal (27).
  6. Distributeur de carburant selon la revendication 5,
    caractérisé en ce que
    l'axe médian (30) du canal (27) est orienté de manière excentrique par rapport à un axe médian (22) de l'espace de carburant (11), et/ou en ce qu'un axe médian (32) de la coupelle (12) est orienté de manière excentrique par rapport à l'axe médian (30) du canal (27).
  7. Distributeur de carburant selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce
    qu'un canal de liaison (25) est prévu, lequel débouche, à partir de la coupelle (12), dans la portion de canal (26), et en ce que le canal de liaison (25) est configuré au moins approximativement parallèlement et de manière excentrique par rapport à un axe médian (32) de la coupelle (12).
  8. Distributeur de carburant selon la revendication 7,
    caractérisé en ce que
    le canal de liaison (25) est configuré de manière excentrique par rapport à l'axe médian (32) de la coupelle (12) en direction de l'espace de carburant (11).
  9. Distributeur de carburant selon l'une quelconque des revendications 1 à 8,
    caractérisé en ce que
    l'obturateur (29) est formé par un obturateur fileté (35) vissé dans le canal (27) et une bague d'étanchéité (36) logée à une extrémité (37) de l'obturateur fileté (35), laquelle bague d'étanchéité rend la portion de canal (26) étanche.
  10. Distributeur de carburant selon l'une quelconque des revendications 1 à 9,
    caractérisé en ce que
    l'obturateur (29) comprend un couvercle (38) soudé sur le boîtier (2) ou un couvercle (38) collé sur le boîtier (2).
EP20120709849 2011-05-02 2012-03-15 Distributeur de combustible Active EP2705241B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12709849T PL2705241T3 (pl) 2011-05-02 2012-03-15 Rozdzielacz paliwa

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011075058A DE102011075058A1 (de) 2011-05-02 2011-05-02 Brennstoffverteiler
PCT/EP2012/054524 WO2012150074A1 (fr) 2011-05-02 2012-03-15 Distributeur de combustible

Publications (2)

Publication Number Publication Date
EP2705241A1 EP2705241A1 (fr) 2014-03-12
EP2705241B1 true EP2705241B1 (fr) 2015-05-13

Family

ID=45872941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20120709849 Active EP2705241B1 (fr) 2011-05-02 2012-03-15 Distributeur de combustible

Country Status (6)

Country Link
EP (1) EP2705241B1 (fr)
CN (1) CN103562539B (fr)
DE (1) DE102011075058A1 (fr)
PL (1) PL2705241T3 (fr)
RU (1) RU2013153133A (fr)
WO (1) WO2012150074A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019120742B3 (de) * 2019-07-31 2021-02-04 Benteler Automobiltechnik Gmbh Kraftstoffverteiler
WO2022268877A1 (fr) * 2021-06-24 2022-12-29 Robert Bosch Gmbh Rampe de carburant renforcée et son procédé de fabrication
WO2023161367A1 (fr) 2022-02-28 2023-08-31 Robert Bosch Gmbh Distributeur de carburant doté d'un système de fermeture à bouchon pour un ensemble de charge de carburant
WO2023161366A1 (fr) 2022-02-28 2023-08-31 Robert Bosch Gmbh Distributeur de carburant pourvu d'un système de fermeture à bouchon pour un ensemble de charge de carburant
WO2023209159A1 (fr) * 2022-04-28 2023-11-02 Robert Bosch Gmbh Rampe à carburant et son procédé de préparation simple
WO2023232363A1 (fr) * 2022-06-03 2023-12-07 Robert Bosch Gmbh Rampe à carburant et son procédé de préparation simple

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4212752B2 (ja) * 2000-02-18 2009-01-21 株式会社オティックス コモンレール
JP3871016B2 (ja) * 2000-05-22 2007-01-24 スズキ株式会社 筒内噴射式エンジンの燃料インジェクタ取付構造
DE10043084A1 (de) * 2000-09-01 2002-03-14 Bosch Gmbh Robert Spannelement für ein Brennstoffeinspritzventil und Brennstoffeinspritzanlage
DE10333721B4 (de) * 2003-07-23 2005-07-07 Benteler Automobiltechnik Gmbh Kraftstoffverteilerleiste mit einem Anschlussstück
DE102008040901A1 (de) * 2008-07-31 2010-02-04 Robert Bosch Gmbh Kraftstoffdruckspeicher für ein Einspritzsystem für Brennkraftmaschinen
DE102009006607B4 (de) * 2009-01-29 2015-10-08 Benteler Automobiltechnik Gmbh Kraftstoffverteiler

Also Published As

Publication number Publication date
PL2705241T3 (pl) 2015-10-30
CN103562539B (zh) 2016-05-18
CN103562539A (zh) 2014-02-05
EP2705241A1 (fr) 2014-03-12
RU2013153133A (ru) 2015-06-10
DE102011075058A1 (de) 2012-11-08
WO2012150074A1 (fr) 2012-11-08

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