WO2016193451A1 - Rampe distributrice de carburant - Google Patents

Rampe distributrice de carburant Download PDF

Info

Publication number
WO2016193451A1
WO2016193451A1 PCT/EP2016/062686 EP2016062686W WO2016193451A1 WO 2016193451 A1 WO2016193451 A1 WO 2016193451A1 EP 2016062686 W EP2016062686 W EP 2016062686W WO 2016193451 A1 WO2016193451 A1 WO 2016193451A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
distributor
fuel distributor
fabric
matrix
Prior art date
Application number
PCT/EP2016/062686
Other languages
German (de)
English (en)
Inventor
Alexander VON NIESSEN
André Wilksen
Original Assignee
Hörnlein Umformtechnik 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 Hörnlein Umformtechnik GmbH filed Critical Hörnlein Umformtechnik GmbH
Publication of WO2016193451A1 publication Critical patent/WO2016193451A1/fr

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
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • F02M53/046—Injectors with heating, cooling, or thermally-insulating means with thermally-insulating means
    • 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
    • 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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/166—Selection of particular materials
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8046—Fuel injection apparatus manufacture, repair or assembly the manufacture involving injection moulding, e.g. of plastic or metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8053—Fuel injection apparatus manufacture, repair or assembly involving mechanical deformation of the apparatus or parts thereof
    • 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
    • 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
    • F02M2200/9023—Fibrous materials

Definitions

  • the present invention relates to a fuel rail for supplying fuel to injectors of an internal combustion engine.
  • fuel manifolds are also referred to as "fuel rails" and are commonly used in automotive engineering to direct fuel to individual injection glands of an internal combustion engine.
  • pressurized fuel flows from an inlet port through a distribution flow to be directed to the individual injectors through branch ports provided at the manifold flow.
  • a known fuel rail is connected to a fuel supply line and therefore arranged between the fuel supply line and the engine.
  • a high-pressure fuel distributor is known, for example, from DE 197 16 659 A1.
  • This fuel distributor is designed for high internal pressures of at least 200 bar.
  • the fuel distributor known from DE 197 16 659 A1 has a double-tube structure with an inner tube with a small wall thickness and an outer tube enclosing the inner tube with a thicker wall thickness.
  • the two tubes are made of high strength steel.
  • the fuel distributor known from DE 197 16 659 A1 is difficult to manufacture and the compressive strength is not ideal. In addition, this fuel raw r is relatively heavy.
  • the manifold flow is surrounded by a fiber composite element.
  • the distributor flow is here an area of the fuel distributor through which or space in the fuel distributor, through which the fuel is passed.
  • the fiber composite element includes a fabric tube embedded in a matrix. In particular, this is therefore constructed from a fabric tube embedded in a matrix.
  • a fiber composite element preferably contains a base body, made of a braided or woven fiber material. This main body is preferably by means of a machine braided. or weave. Respectively. Knitting method in which a fiber material is braided into a tubular structure, or knitted or woven, is produced.
  • fiber fibers and / or carbon fibers carbon fibers and / or aramid fibers and / or basalt fibers
  • fiber materials can be used as fiber materials.
  • the fabric hose is embedded in a matrix.
  • a fiber composite element containing a fabric tube embedded in a matrix can be produced, for example, as follows.
  • the fabric hose is made of a fiber material.
  • a material serving as a matrix (in the following matrix) is applied so that a fiber composite material is formed from the matrix and the fiber material.
  • the matrix should be chosen such that the fabric tube has a corresponding density and at the same time increased stability.
  • a fabric hose can be inserted into a type of injection mold, in particular into a cavity of an injection mold formed between two mold halves.
  • Cores for example displaceable cores, may be provided in a manner known per se on the mold halves or in the cavity, e.g. in areas of the cavity in which later, for example, the branch openings or the distributor flow are provided.
  • the fabric hose can for example be mounted on such a core or such a core is "woven" directly by means of a weaving weaving process.
  • the matrix in particular a plastic, is injected into the mold cavity with the ensemble of fabric tube and core contained therein, preferably under high pressure. As a result, a fiber composite material is formed in a manner known per se. After curing, the fuel distributor is obtained.
  • the cavity or and / or the cores may be formed so that during manufacture in one step, the connecting pieces and / or the final shape of the fuel distributor are formed simultaneously with inlet connection and connection piece.
  • the inserted core (s) can either be removed later, for example, simply by melting it, or, if the corresponding geometry of the resulting fiber composite element permits, it can be pulled out of it again so that the distributor flow rate and the flow rate are increased corresponding branch openings are released again.
  • the fabric hose made from the fiber material can also be mounted on a molding template or the manifold, or braided around it and impregnated and / or coated and / or coated with a suitable matrix. After this application of the matrix, in a further process step, e.g. formed by heating the corresponding fiber composite material.
  • a pressure-resistant fuel rail can be provided, which is at the same time weight-reduced and easy to manufacture.
  • thermoplastic or thermosetting matrix can be used.
  • thermoplastic matrix in particular PEEK (polyetheretherketone), PP (polypropylene), PA 6 (polyamide 6), PA 6.6 (polyamide 6.6), ABS (acrylonitrile-butadiene-styrene), PVC (polyvinyl chloride), PC (polycarbonate) or a mixture used the same.
  • PEEK polyetheretherketone
  • PP polypropylene
  • PA 6 polyamide 6
  • PA 6.6 polyamide 6.6
  • ABS acrylonitrile-butadiene-styrene
  • PVC polyvinyl chloride
  • PC polycarbonate
  • thermosets are used as matrix polyester (PES), formaldehyde resins, epoxy resins, polyurethanes can be used.
  • a subsequent "baking step" should be performed in the autoclave which ensures a particularly high stability and hardness of the formed fiber composite fabric hose.
  • the matrix may be provided with or fillers and / or reinforcing materials such as GF (glass fibers) or GK (glass beads).
  • this matrix can also be designed to be free and / or free of reinforcing material.
  • the matrix can be applied by injection molding. This process has already been described by way of example.
  • the fabric hose in the region of at least one of the branch openings may have a fabric hose branch which goes away from the fabric hose.
  • the fuel introduced into the fuel distributor in this development flows through the distributor flow via the branch openings into corresponding tube regions which are formed in branch nozzles which are attached to the branch openings and from these tube regions into the corresponding injectors. It is advantageous in this case, if not only the fabric tube is formed as a tube-like structure, but also in the region of the respective branch opening, at least one of the branch openings, a hose-like trained branching is provided on the fabric tube.
  • this fabric hose branch can be provided integrally with the fabric hose, so that the fabric hose branches are part of the fabric hose.
  • the fabric hose branch is in particular in a single process step in the manufacture of the fabric tube by means of the previously described braiding / weaving method, e.g. made with a wicker tool. Providing such fabric structure from a fabric tube having at least one corresponding branch provides an easy way to provide complex geometries of fiber composite elements.
  • such a described fabric hose branch can be provided in the region of each individual branch opening of the fuel distributor.
  • the fabric structure has an elongated basic structure from the finger-shaped fabric hose branches depart.
  • the fabric hose may be formed at one of its longitudinal ends dead-end.
  • This bag-tail configuration ensures that the manifold flow is substantially completely enclosed by the fabric tube, except for one inlet and with the exception of the areas where the branch openings are provided.
  • the fabric tube advantageously has an elongated configuration with a dead longitudinal end. At such a dead longitudinal end
  • a possibility can also be provided, for example, a small opening in relation to the tube dimensions, by means of which a sensor connection is provided.
  • the fabric hose forms a fuel distributor housing which surrounds a distributor pipe delimiting the distributor flow.
  • a manifold is therefore provided as a separate element and hooked in a formed in the fabric tube receiving space.
  • the fabric hose is located close to the distributor tube, particularly preferably over the whole area.
  • Such a manifold can be made individually or in sections or elements of different materials, in particular fiber composite material, plastic, metal, especially steel.
  • the manifold should have a minimum wall thickness of at least 5 millimeters to allow the fuel rail to withstand the pressure from the fuel being passed.
  • the wall thickness can be reduced compared to conventional manifolds.
  • the following wall thicknesses are preferred for the following materials. For metal, especially steel, a wall thickness of 2 to 5 mm, in particular 2.2 to 3.6 mm is advantageous.
  • the distributor tube can be pushed into the already prepared receiving space of the fabric tube.
  • the distributor tube simultaneously acts as a type of template, in the manner of a "stopper ice.”
  • the distributor tube is preferably introduced into a braiding device and preferably braided by means of an automated method.
  • the fabric hose forms a distributor pipe delimiting the distributor flow.
  • the fuel Accordingly, flows directly through the fabric tube along the inner peripheral wall along.
  • On a separate manifold is therefore dispensed with.
  • Such a sealing film may also be provided as a separate element within the receiving space.
  • the fabric hose thus forms both the fuel rail housing and the manifold flow.
  • the fabric hose may be at least partially surrounded by a housing shell.
  • a housing may be obtained by means of the method described in utility model application number DE 202015102888.1, e.g. from at least two crimped fiber composite half shells, be constructed.
  • these housing shells can meanwhile have connection flanges which are crimped together.
  • the above-described method and such a housing are hereby incorporated by reference to the aforementioned utility model application in the disclosure of the present application.
  • other housing materials are also conceivable.
  • the fabric hose branch can form a connecting piece for connection to the internal combustion engine.
  • Such formed as a connecting piece fabric hose branches can be used independently for connection to the engine, without, for example, provided further provided in this piece of fabric pipe sockets. Accordingly, these connecting pieces directly form the connection lines.
  • the fabric tube can be seamless.
  • this hose is braided as a whole that not several parts must be sewn together later in a further process step.
  • the fabric hose branches are designed to be seamless and are also connected seamlessly to the fabric hose.
  • the fuel distributor at least in the region of an opening with a reinforcement in particular a reinforcing element be provided.
  • an opening may be a branch opening, an inlet opening, an outlet opening.
  • Such reinforcement can be achieved, on the one hand, by closer weaving at the corresponding points of the fabric tube or by the use of a multi-layered fabric at the corresponding points.
  • such a reinforcement can also be provided by the fact that in the areas to be reinforced fiber composite material elements are applied, which are produced in a so-called Tapelegebacter.
  • the fabric hose and / or, if present, also the distributor pipe is provided with a fiber composite reinforcement which is wrapped in the tape laying method.
  • a tape containing a fiber material which may contain a matrix or be matrix-free, is wound around the respective areas.
  • a mutually entangled, preferably cross-type tape winding may be provided in the region of a connecting piece, wherein the tapes intersect in such a way that they receive the corresponding connecting piece between them.
  • a motor vehicle is specified with an internal combustion engine to which a fuel distributor as previously described has been connected.
  • the invention also relates to the corresponding previously described method for producing a fuel rail using a fabric tube.
  • FIG. 1 a shows a fuel distributor according to the invention in a schematic view obliquely from below
  • Figure 1 b is a longitudinal section of the fuel distributor shown in Figure 1 and
  • Figure 2 shows an example of a braided fabric tube for producing a fuel distributor according to the invention.
  • FIG. 1 a shows a fuel distributor provided with reference number 1.
  • This has a manifold 2 (see Figure 1 b) which is covered by a fabric tube 3.
  • the fabric hose is formed from a fiber material which is conveyed by means of a matrix. is soaked and thus forms a fiber composite fabric hose.
  • the fiber composite fabric hose 3 simultaneously forms a housing of the fuel rail, in which the manifold 2 is received.
  • the manifold 2 has an inlet port 4 with an inlet port through which pressurized fuel is introduced into a manifold flow formed within the manifold 2 and three manifolds 5 with exhaust ports projecting substantially perpendicularly from the manifold to which pressurized fuel from the manifold flow is supplied not shown injection valves is passed.
  • the fiber composite fabric tube 3 is in the present example, an elongated cylindrical Sackgassenförmig ausgestaltetes element, so that ultimately 5 openings in the fabric tube 3 are provided only in the region of the inlet nozzle 4 and in the region of the connecting piece.
  • the fabric hose is braided directly around the distributor tube 2 by means of a braiding technique and thus also abuts longitudinally provided shoulders 6, 6 'of the distributor tube 2 so that it can not be pulled out of a receiving space of the fabric tube 3 again.
  • the finished fabric tube 3 can be drawn onto the distributor tube 2 even before it is impregnated with the matrix.
  • fiber fibers and / or carbon fibers can be used as fiber materials.
  • Other common fiber materials can also be used.
  • fiber composite material can be chosen between the different fiber types or a mixture thereof.
  • these fiber materials are embedded in a matrix.
  • the matrix is in particular a thermoplastic or thermoset matrix.
  • thermoplastic matrix in particular PEEK (polyetheretherketone), PP (polypropylene), PA 6 (polyamide 6), PA 6.6 (polyamide 6.6), ABS (acrylonitrile-butadiene-styrene), PVC (polyvinyl chloride), PC (polycarbonate) or a mixture used the same.
  • PEEK polyetheretherketone
  • PP polypropylene
  • PA 6 polyamide 6
  • PA 6.6 polyamide 6.6
  • ABS acrylonitrile-butadiene-styrene
  • PVC polyvinyl chloride
  • PC polycarbonate
  • thermosets are used as a matrix
  • polyesters (PES) formaldehyde resins
  • epoxy resins polyurethanes
  • thermosets in particular a subsequent “baking step” should be carried out in an autoclave which has a special ensures high stability and hardness of the formed fiber composite fabric hose.
  • the fiber composite material may contain further reinforcing or fillers.
  • the matrix may be coated with or fillers and / or reinforcing materials, e.g. GF (glass fibers) or GK (glass beads) be provided.
  • this matrix can also be designed to be filled and / or free of reinforcing material.
  • the fibers have a length such that they can be woven into a fabric tube by means of a braiding technique.
  • the woven fiber material may have a uniform weave pattern and / or at least in some areas a different weave pattern or a different weaving density.
  • reinforcing elements 7 are produced in the longitudinal direction of the fuel distributor by means of the tape laying method. These are opposite each other, wherein one of the two reinforcing elements is provided in extension of the row of connecting pieces.
  • the reinforcing elements are therefore also made of fiber composite material.
  • the connecting pieces 5 are not surrounded by fabric hose branches which depart from the fabric hose.
  • the fabric hose can also be woven in such a way that the connecting pieces 5 are provided integrally thereon and seamlessly corresponding fabric hose branches at the corresponding points.
  • the fuel rail may be made as a whole of a fiber composite fabric hose, so that can be dispensed with a separate manifold.
  • FIG. 2 shows an example of a hose of a pre-woven fiber material which is provided as a jacket of the distributor pipe 2 shown in FIGS. 1a and 1b. Due to the view shown in FIG. 2, the openings are where later the connection rods zen 5 in the embodiment in Figure 1 a and 1 b are provided, not visible, because they lie on the back of the view of Figure 2.

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)
  • Moulding By Coating Moulds (AREA)

Abstract

Rampe (1) distributrice de carburant destiné à l'alimentation en carburant des injecteurs d'un moteur à combustion interne, comprenant un élément d'écoulement destiné à la réception de carburant sous pression et pourvu d'orifices de distribution. Le but de la présente invention concerne une rampe distributrice de carburant facile à fabriquer tout en satisfaisant aux exigences correspondantes liées à une rampe distributrice de carburant. A cet effet, l'élément d'écoulement est entouré d'un élément en matériau composite renforcé par des fibres, lequel contient un flexible en tissu (3) incorporé dans une matrice.
PCT/EP2016/062686 2015-06-03 2016-06-03 Rampe distributrice de carburant WO2016193451A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE202015102888.1U DE202015102888U1 (de) 2015-06-03 2015-06-03 Kraftstoffverteilerrohr sowie Kraftfahrzeugbauteil
DE202015102888.1 2015-06-03
DE102015111759.2 2015-07-20
DE102015111759.2A DE102015111759A1 (de) 2015-06-03 2015-07-20 Kraftstoffverteiler

Publications (1)

Publication Number Publication Date
WO2016193451A1 true WO2016193451A1 (fr) 2016-12-08

Family

ID=56119328

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/062686 WO2016193451A1 (fr) 2015-06-03 2016-06-03 Rampe distributrice de carburant

Country Status (3)

Country Link
EP (1) EP3101263A1 (fr)
DE (3) DE202015102888U1 (fr)
WO (1) WO2016193451A1 (fr)

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DE202015102888U1 (de) 2015-06-03 2016-09-12 Hörnlein Umformtechnik GmbH Kraftstoffverteilerrohr sowie Kraftfahrzeugbauteil
DE102019212577A1 (de) * 2019-08-22 2021-02-25 Volkswagen Aktiengesellschaft Verfahren zur Herstellung eines Hohlprofil-Formteils

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