EP4077906A1 - Distributeur de fluide pour un système d'injection, en particulier une rampe de distribution de carburant pour un système d'injection de carburant pour moteurs à combustion interne à compression de mélange et à allumage commandé - Google Patents

Distributeur de fluide pour un système d'injection, en particulier une rampe de distribution de carburant pour un système d'injection de carburant pour moteurs à combustion interne à compression de mélange et à allumage commandé

Info

Publication number
EP4077906A1
EP4077906A1 EP20808352.7A EP20808352A EP4077906A1 EP 4077906 A1 EP4077906 A1 EP 4077906A1 EP 20808352 A EP20808352 A EP 20808352A EP 4077906 A1 EP4077906 A1 EP 4077906A1
Authority
EP
European Patent Office
Prior art keywords
axis
pressure outlet
holding element
high pressure
base body
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.)
Pending
Application number
EP20808352.7A
Other languages
German (de)
English (en)
Inventor
Cengiz OTUK
Omercan YURUMEZ
Ralf Weber
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 EP4077906A1 publication Critical patent/EP4077906A1/fr
Pending legal-status Critical Current

Links

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
    • 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
    • F02M2200/855—Mounting of fuel injection apparatus using clamp elements or fastening means, e.g. bolts or screws
    • 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
    • F02M2200/857—Mounting of fuel injection apparatus characterised by mounting fuel or common rail to engine
    • 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
    • F02M2200/9053—Metals

Definitions

  • Fluid distributor for an injection system in particular a fuel distributor strip for a
  • the invention relates to a fluid distributor for an injection system, in particular a fuel distributor strip for a fuel injection system for mixture-compressing, externally ignited internal combustion engines, as well as an injection system.
  • the invention relates to the field of fuel injection systems that are used for mixture-compressing, spark-ignited internal combustion engines, the fuel rail being arranged, for example, in an engine compartment of a motor vehicle, attached to a cylinder head of the internal combustion engine and, during operation, used for direct injection of fuel into combustion chambers of the internal combustion engine.
  • JP 2018-158372 A it is known to produce a base body for a distributor bar by forging.
  • the material is forged eccentrically, so that five connection elements, which are drilled after forging, and also two holding elements, which are also drilled after forging, are formed by forging on the forged base body.
  • the fastening elements formed by forging on the base body and then drilled are of high strength, so that the entire distribution strip can be reliably mounted and fastened with suitable attachments, for example on a cylinder head in an engine compartment.
  • the fluid distributor according to the invention with the features of claim 1 and the injection system according to the invention with the features of claim 10 have the advantage that an improved design and functionality are made possible.
  • a direct connection of valves to the high pressure outlets can be made possible.
  • the proposed injection system can in particular be designed as a fuel injection system which is used to inject a fuel or a mixture with at least one fuel.
  • an injection system can serve not only for liquid fluids, but also, if necessary, enable gaseous fluids, in particular combustible gases, to be injected.
  • the fluid distributor can be fastened to a suitable body via exactly two retaining elements, which is possible directly or indirectly, for example via a suitable retaining structure.
  • the injection system is designed, for example, as a fuel injection system for motor vehicles, then there is usually the need to fasten the injection system in the engine compartment, in particular on a cylinder head, with high loads occurring.
  • the term holding element here refers to the elements of the fluid distributor which can be loaded accordingly and to which the at least indirect attachment of the fluid distributor to a suitable body, in particular a cylinder head, takes place.
  • the holding elements usually have to withstand very high loads. If the holding elements are forged on the tubular base body, as is preferred, then, as a rule, a substantial amount of material must be taken into account.
  • a soldered configuration is implemented in which the holding elements are connected to the tubular base body by soldering.
  • the material for producing the tubular base body and preferably also the holding elements and high-pressure outlets that are forged on is cut to length, for example from a round material. The amount of material then results with a certain tolerance.
  • the cut-to-length material is placed in a press, which can consist of a lower half of the die and an upper half of the die.
  • the die halves provide a contour for the forging process, which defines the forged shape of the base body. Even at the lower end of the tolerance, it must be possible to fill the contour to 100% during forging.
  • the contour for the base body varies locally and can, for example, provide eccentricities or a local additional material requirement, there is usually a locally varying amount of material that is displaced between the die halves into a gap serving to accommodate displaced material.
  • the forging contour can be achieved reliably in one or more forging stages.
  • the use of high-quality materials, in particular high-quality steels, is advantageous here.
  • a stainless steel is preferably used for the design of the base body, the high-pressure outlets and the holding elements, with a one-piece design preferably taking place by forging.
  • the holding elements of the fluid distributor counteract the reaction forces of the valves resulting from the hydraulic pressure and can thereby advantageously prevent the tubular base body from bending; in particular, the bearing of the valves on a cylinder head can lead to reaction forces which are directed from the cylinder head to the fluid distributor.
  • This reduces valve movements relative to the high pressure outlets. This in turn reduces the stresses placed on seals between the valves and the high pressure outlets. In particular, wear of sealing rings or the like is prevented.
  • a good support of the fluid distributor on a cylinder head is necessary in order not to overload, for example, screws that fix the tubular base body of the fluid distributor to the cylinder head.
  • the arrangement of the holding elements on the tubular base body is essential here.
  • the arrangement of the holding elements on the tubular base body also influences the natural frequency of the fluid distributor, and under vibration loads the holding elements and the related fastening must hold the fluid distributor securely in position on, for example, a cylinder head.
  • Advantageous orientations or arrangements are possible according to claim 2 and / or claim 3.
  • the holding elements are preferably arranged as close as possible to the longitudinal axis of the tubular base body, as specified in claim 4.
  • a further optimization is possible through an advantageous embodiment according to claim 5.
  • this makes it possible to achieve a comparable load on seals, in particular O-sealing rings, at the individual high-pressure outlets, in order to prevent overloading of one of these seals.
  • the positioning of the holding elements as a function of given boundary conditions, in particular geometric parameters, can advantageously be determined by means of a simulation.
  • An essential parameter here is the predetermined distance, which is predetermined, for example, by a cylinder distance in an internal combustion engine with three cylinders.
  • Particularly advantageous arrangements of the holding elements can be implemented in accordance with claim 6 and / or claim 7.
  • An advantageous embodiment of the fluid distributor, in which, in particular, a one-piece embodiment is made by forging, is specified in claim 8.
  • the advantageous embodiment specified in claim 9 is particularly suitable for Otto engines or for the injection of gasoline and gasoline mixtures.
  • the high-pressure outlets are designed as radial high-pressure outlets on the tubular base body.
  • the tubular base body is preferably formed from a corrosion-resistant stainless steel, in particular from a stainless steel with the material number 1.4301, 1.4307, 1.4462 or 1.4362.
  • FIG. 1 shows an injection system in the form of a fuel injection system with a fluid distributor in the form of a fuel distribution rail in a partial, schematic representation according to an exemplary embodiment of the invention
  • FIG. 2 shows the fluid distributor shown in FIG. 1 in an excerpted, schematic illustration in the viewing direction denoted by X2 according to the exemplary embodiment of the invention
  • FIG. 1 shows an injection system in the form of a fuel injection system with a fluid distributor in the form of a fuel distribution rail in a partial, schematic representation according to an exemplary embodiment of the invention
  • FIG. 2 shows the fluid distributor shown in FIG. 1 in an excerpted, schematic illustration in the viewing direction denoted by X2 according to the exemplary embodiment of the invention
  • FIG. 1 shows an injection system in the form of a fuel injection system with a fluid distributor in the form of a fuel distribution rail in a partial, schematic representation according to an exemplary embodiment of the invention
  • FIG. 2 shows the fluid distributor shown in FIG. 1 in an excerpted, schematic illustration in the viewing direction denote
  • FIG. 3 shows the fluid distributor shown in FIG. 1 according to a modified embodiment from the viewing direction denoted by Xi.
  • a fluid distributor 1 for an injection system 100 are described with the aid of the figures.
  • a fluid distributor 1 can be designed as a fuel distributor strip 1 and serve for a fuel injection system 100 in which a fluid is distributed to preferably several valves (injection valves) 101 to 103, in particular fuel injection valves 101 to 103.
  • the fluid distributor 1 is preferably designed in such a way that there is a very high load capacity with regard to a pressure of the fluid that is stored within the fluid distributor 1 and distributed, for example, to fuel injection valves 101 to 103.
  • the fluid distributor 1 is preferably implemented as a forged fluid distributor 1, so that high loads with regard to the pressure of the fluid are possible.
  • a fluid distributor 1 is considered here, the tubular base body 2 of which is forged. It is conceivable that the fluid distributor 1 also has at least one further component that is screwed to the base body 2 or connected, for example, by welding or soldering.
  • FIG. 1 shows an injection system 100 embodied as a fuel injection system 100 with a fluid distributor 1 embodied as a fuel distribution rail 1 in a schematic illustration corresponding to an exemplary embodiment of the invention.
  • FIG. 2 shows the fluid distributor 1 from the viewing direction designated by X2 in FIG. 1.
  • the desired shape of the base body 2 can be predetermined in a complex manner.
  • the tubular base body 2 has a tubular part 3, which is also provided with a longitudinal bore 42 along a longitudinal axis 4 in order to form an interior space 41, as shown in FIG. 3.
  • the base body 2 has holding elements 5, 6, which are forged here as eccentricities.
  • Axes 7, 8 of the holding elements 5, 6 are spaced apart from the longitudinal axis 4 in this exemplary embodiment.
  • high-pressure outlets 9 to 11 designed as cups 9 to 11 for connecting fuel injectors 101 to 103 are forged on base body 2.
  • Axes 12 to 14 of the high pressure outlets 9 to 11 cross the longitudinal axis 4 in this exemplary embodiment, as is illustrated in FIG. 3 by an axis 12.0 for the high pressure outlet 9.
  • connection piece 15 is formed on the base body by forging, which can be used, for example, to connect a pressure sensor 16.
  • An axial high pressure inlet 17 is also formed on the tubular part 3.
  • directions X1.X2.X3 can be defined according to a right-hand system (right-hand system of three coordinates).
  • the direction Xi is oriented here along the longitudinal axis 4.
  • the direction X2 points from the longitudinal axis 4 of the tubular base body 2 to a cylinder head 18 of an internal combustion engine 19 when the fluid distributor 1 is mounted.
  • the axes 7, 8 of the holding elements 5, 6 and the axes 12 to 14 of the high-pressure outlets 9 to 11 are oriented parallel to one another and along the direction X2 in this exemplary embodiment. Defining the directions Xi and X2 then results in the orientation of the direction X3, which is thus parallel to an upper side 20 of the cylinder head 18 when the fluid distributor 1 is mounted.
  • the fastening of the fluid distributor 1 to the cylinder head 18 is illustrated schematically by fastening elements (screws) 30, 31 which each engage on one of the holding elements 5, 6 and are oriented along the axes 7, 8.
  • the internal combustion engine 19 has three cylinders 21 to 23. As a result, a distance 24 is specified between the axis 12 of the high pressure outlet 9 and the axis 13 of the high pressure outlet 10 or between the axis 13 of the high pressure outlet 10 and the axis 14 of the high pressure outlet 11, which in this embodiment is a cylinder distance 24.
  • valves 101 to 103 are supported on the cylinder head 18 in the direction X2 in this exemplary embodiment.
  • reaction forces occur which act on the valves 101 to 103 against the direction X2, so that elastic deformations of the tubular base body 2 occur with respect to the longitudinal axis 4.
  • this can result in displacements of the high-pressure outlets 9 to 11 in and against the direction X2, which load the corresponding sealing points on the valves 101 to 103.
  • the two holding elements 5, 6 are arranged on the tubular base body 2 in such a way that only two holding elements 5, 6 enable adequate fastening without overloading the seals.
  • the positioning along the longitudinal axis 4 of the tubular base body 2 is essential.
  • the axis 7 is at least substantially at the axis 12 and / or the axis 8 is at least substantially at the axis 14 lies.
  • the first distance 28 and the second distance 29 are specified to be greater than zero.
  • the axis 7 of the holding element 5, viewed from the axis 12 of the high-pressure outlet 9, is always in the direction Xi, while the axis 8 of the holding element 6, viewed from the axis 14 of the high-pressure outlet 11, is always opposite to the direction Xi.
  • the first distance 28 is at most 0.5 times the predetermined distance (cylinder distance) 24.
  • the second distance 29 is also at most 0.5 times the predefined distance 24.
  • the first distance 28 and the second distance 29 are not necessarily selected to be the same size.
  • the first distance 28 and / or the second distance 29 are each predetermined with a positive value, in particular at least 0.1 times the predetermined distance 24 being predetermined. Furthermore, the first distance 28 and / or the second distance 29 is in each case preferably predefined with a value that is at most 0.3 times the predefined distance 24.
  • the holding elements 5, 6 result along the direction X3.
  • the holding elements 5, 6 or the axes 7, 8 are preferably arranged on different sides of the longitudinal axis 4 with respect to the direction X3.
  • distances 35, 36 between the axis 7 and the longitudinal axis 4 or the axis 8 and the longitudinal axis 4 are preferably minimized in relation to at least one required wall thickness, in particular a wall thickness of the tubular base body 2.
  • the axes 7, 8 of the holding elements 5, 6 are preferably positioned along the longitudinal axis 4 in such a way that the deformations of the tubular base body 2 occurring during operation are evened out, in particular at least approximately equal in terms of amount, maximum displacements of the high-pressure outlets 9 to 11 in and against the direction Cause X2.
  • the equalized load is then lower than the greatest individual load.
  • the design selected in the specific individual case can, however, also be determined with reference to further boundary conditions.
  • the configuration of the tubular base body 2 does not necessarily have to be symmetrical.
  • one of the distances 28, 29 can also be 0.3 times the predefined distance 24, while the other is 0.2 times the predefined distance 24.
  • a positive axial offset 40 that is to say different from zero, is specified, as is shown in FIG. 3, then this can be oriented from the longitudinal axis 4 in or against the direction X3.
  • this axial offset 40 is oriented against the direction X3 when viewed from the longitudinal axis 4 .
  • the axis 12 is marked with a vanishing axis offset 40 with 12.0 and the axis 12 corresponding to a positive axis offset 40 with 12.1.
  • the longitudinal axis 4 and / or the axes 7, 8 of the holding elements 5, 6 and / or the axes 12 to 14 of the high-pressure outlets 9 to 11 can in particular be determined as bore axes of suitable bores.
  • the fluid distributor 1 takes up less installation space and can be made lighter. The lesser one The use of materials can lead to a significant reduction in manufacturing costs. On the one hand, the amount of rod material required can be reduced. On the other hand, process energy for heating the rod up to the forging temperature can be saved, especially in the case of a forged version.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Forging (AREA)

Abstract

L'invention concerne un distributeur de fluide (1) pour un système d'injection (100), en particulier une rampe de distribution de carburant (1) pour un système d'injection de carburant (100) pour moteurs à combustion interne à compression de mélange et à allumage commandé, comprenant une partie principale tubulaire (2) qui est de préférence usinée dans un procédé de forgeage à une ou plusieurs étapes. La partie principale (2) est équipée d'une première sortie haute pression (9), d'une deuxième sortie haute pression (10), et d'une troisième sortie haute pression (11), la deuxième sortie haute pression (10) étant décalée par rapport à la première sortie haute pression (9) dans une première direction (X1) le long d'un axe longitudinal (4) de la partie principale tubulaire (2) d'une distance spécifiée (24), et la troisième sortie haute pression (11) étant décalée par rapport à la deuxième sortie haute pression (10) dans la première direction (X1) le long de l'axe longitudinal (4) de la distance spécifiée (24). Sur la partie principale (2) sont prévus un premier élément de retenue (5) et un second élément de retenue (6) qui sont utilisés pour fixer au moins indirectement la partie principale (2), lesdits premier élément de retenue (5) et second élément de retenue (6) étant formés sur la partie principale tubulaire (2) de sorte que l'axe (7) du premier élément de retenue (5) est positionné à une distance d'au maximum 0,5 fois la distance spécifiée (24) par rapport à l'axe (12) de la première sortie haute pression (9) dans la première direction (X1) lorsqu'il est vu le long de l'axe longitudinal (4), et l'axe (8) du second élément de retenue (6) est positionné à une distance d'au maximum 0,5 fois la distance spécifiée (24) par rapport à l'axe (14) de la troisième sortie haute pression (11) à l'opposé de la première direction (X1) lorsqu'il est vu le long de l'axe longitudinal (4).
EP20808352.7A 2019-12-20 2020-11-17 Distributeur de fluide pour un système d'injection, en particulier une rampe de distribution de carburant pour un système d'injection de carburant pour moteurs à combustion interne à compression de mélange et à allumage commandé Pending EP4077906A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019220372.8A DE102019220372A1 (de) 2019-12-20 2019-12-20 Fluidverteiler für eine Einspritzanlage, insbesondere Brennstoffverteilerleiste für eine Brennstoffeinspritzanlage für gemischverdichtende, fremdgezündete Brennkraftmaschinen
PCT/EP2020/082352 WO2021121824A1 (fr) 2019-12-20 2020-11-17 Distributeur de fluide pour un système d'injection, en particulier une rampe de distribution de carburant pour un système d'injection de carburant pour moteurs à combustion interne à compression de mélange et à allumage commandé

Publications (1)

Publication Number Publication Date
EP4077906A1 true EP4077906A1 (fr) 2022-10-26

Family

ID=76206225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20808352.7A Pending EP4077906A1 (fr) 2019-12-20 2020-11-17 Distributeur de fluide pour un système d'injection, en particulier une rampe de distribution de carburant pour un système d'injection de carburant pour moteurs à combustion interne à compression de mélange et à allumage commandé

Country Status (7)

Country Link
US (1) US11725617B2 (fr)
EP (1) EP4077906A1 (fr)
JP (1) JP2023506646A (fr)
KR (1) KR20220113519A (fr)
CN (1) CN114846234A (fr)
DE (1) DE102019220372A1 (fr)
WO (1) WO2021121824A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006233858A (ja) * 2005-02-24 2006-09-07 Denso Corp コモンレール式燃料噴射装置
JP2007146725A (ja) * 2005-11-25 2007-06-14 Denso Corp コモンレール
JP5768635B2 (ja) * 2011-09-29 2015-08-26 株式会社デンソー 燃料分配管の取付け構造
DE202014104466U1 (de) * 2014-09-19 2014-09-25 Benteler Automobiltechnik Gmbh Kraftstoffverteiler
US10302107B2 (en) 2016-07-01 2019-05-28 Ford Motor Company Fastening system and method using a compressible sleeve
JP6969128B2 (ja) 2017-03-23 2021-11-24 株式会社デンソー 配管部品の製造方法、および配管部品の製造装置
DE102019123673B3 (de) * 2019-09-04 2020-12-10 Benteler Automobiltechnik Gmbh Kraftstoffverteiler

Also Published As

Publication number Publication date
US11725617B2 (en) 2023-08-15
DE102019220372A1 (de) 2021-06-24
CN114846234A (zh) 2022-08-02
JP2023506646A (ja) 2023-02-17
KR20220113519A (ko) 2022-08-12
US20230118352A1 (en) 2023-04-20
WO2021121824A1 (fr) 2021-06-24

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