EP3613978A1 - Arrangement of a fuel injection valve on a fuel distributor of a combustion engine - Google Patents

Arrangement of a fuel injection valve on a fuel distributor of a combustion engine Download PDF

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Publication number
EP3613978A1
EP3613978A1 EP19188963.3A EP19188963A EP3613978A1 EP 3613978 A1 EP3613978 A1 EP 3613978A1 EP 19188963 A EP19188963 A EP 19188963A EP 3613978 A1 EP3613978 A1 EP 3613978A1
Authority
EP
European Patent Office
Prior art keywords
fuel
fuel injection
injection valve
receiving element
cylinder
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.)
Granted
Application number
EP19188963.3A
Other languages
German (de)
French (fr)
Other versions
EP3613978B1 (en
Inventor
Marcus GÖSCHEL
Paul Triebsch
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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 Volkswagen AG filed Critical Volkswagen AG
Publication of EP3613978A1 publication Critical patent/EP3613978A1/en
Application granted granted Critical
Publication of EP3613978B1 publication Critical patent/EP3613978B1/en
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
    • 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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/242—Arrangement of spark plugs or 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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/0275—Arrangement of 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/09—Fuel-injection apparatus having means for reducing noise
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M2200/803—Fuel injection apparatus manufacture, repair or assembly using clamp elements and 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
    • F02M2200/851—Mounting of fuel injection apparatus provisions for adjusting the angular, rotational or axial position 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/852—Mounting of fuel injection apparatus provisions for mounting the fuel injection apparatus in a certain orientation, e.g. markings or notches
    • 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
    • F02M2200/855—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
    • F02M2200/856—Mounting of fuel injection apparatus characterised by mounting injector to fuel or common rail, or vice versa

Definitions

  • the invention relates to an arrangement for connecting at least one fuel injector to a fuel distributor of a fuel injection system of an internal combustion engine, which is releasably attached to a cylinder head, the at least one fuel injector being releasably attached to a receiving element of the fuel distributor by means of a fixing element.
  • the publication WO 2016/020255 A1 describes an arrangement for connecting a connection part of a fuel injector to a cup of a fuel-carrying component, a connecting clip being provided.
  • the connecting clip connects the connection part of the fuel injector to the cup.
  • a contact contour provided on the connecting part and a contact contour provided on the connecting clip, on which contact between the connecting part and the connecting clip comes about in the assembled state are designed so that they are adapted to one another in such a way that the connecting part is supported on the connecting clip, which ensures that a Allows pivoting of the connecting part with respect to a longitudinal axis of the cup.
  • a further arrangement for high pressure injection in internal combustion engines includes a fuel rail and several fuel injectors.
  • Each of the fuel injection valves is arranged on a cup of the fuel distributor. At least one of the fuel injection valves is attached to the associated cup by a holding element.
  • the holding element has a support surface.
  • the underside of the cup has a contact surface with which the cup is supported on the supporting surface of the holding element by means of a damping layer.
  • the holding element is fixed to the cup.
  • the fuel injector also has a collar which is supported on the holding element.
  • the damping layer makes it possible to dampen vibrations and thus reduce noise emissions.
  • the publication DE 10 2008 002 122 A1 discloses a hold-down device for a fuel injection device, which comprises at least one fuel injection valve, a receiving bore for the fuel injection valve and a connecting piece of a fuel distributor line.
  • the hold-down device can be clamped between a shoulder of the fuel injection valve and an end face of the connecting piece.
  • the hold-down device has a part-ring-shaped base element, from which an axially flexible hold-down bracket extends, which has at least two webs, two inclined sections and two contact sections.
  • the basic element is designed as an upright partial ring, the wall thickness of which corresponds to the sheet thickness used.
  • the base element merges into the two webs of the hold-down bracket in such a way that the webs which extend out of the plane of the base element face each other with their sheet metal broad sides and the webs are bent at their end facing away from the base element in such a way that the bent end regions of the webs give rise to them Extend sloping sections so that the cut edges in the sheet are now facing each other.
  • the connecting bracket from the arrangement according to the document WO 2016/020255 A1 and the hold-down according to the document DE 10 2008 002 122 A1 represent geometrically complicated structures to be manufactured.
  • the holding element according to the document WO 2013/170998 A1 is somewhat simpler in terms of geometry.
  • a further arrangement for connecting at least one fuel injection valve to a fuel distributor of a fuel injection system of an internal combustion engine is given in the document DE 10 2016 210 573 A1 emerges, wherein the at least one fuel injector is releasably attached to a cup of the fuel distributor by means of a holding element.
  • the cup has at least one gap which, in the assembly situation, makes a clamping collar of a connecting element of the fuel injector accessible, since the connecting element of the fuel injector is in the cup in the assembling situation, the clamping collar in the assembling situation of jaws of the holding element pushed into the gap in the Cup is fixed.
  • the invention is based on the object of creating another alternative advantageous connection between a fuel injection valve and a fuel distributor of an internal combustion engine.
  • the starting point of the invention is an arrangement for connecting at least one fuel injection valve to a fuel distributor of a fuel injection system of an internal combustion engine, which is releasably attached to a cylinder head, the at least one fuel injection valve being releasably attached to a receiving element of the fuel distributor by means of a fixing element.
  • a surface of the receiving element of the fuel distributor facing away from the cylinder and a surface of the fixing element facing the cylinder in the assembled state of the cylinder head and fuel distributor and the fuel injector are designed as contact surfaces, by means of which the fixing element is attached to the fuel injector to fix axially and radially align the fuel injector can be effected in the cylinder head or in the receiving element of the fuel distributor.
  • the fixing element is a screw head which has a blind hole which is provided with an internal thread which, in the assembled state, faces the surface of the receiving element which faces away from the cylinder, the surface facing the cylinder being formed around the blind hole of the fixing element.
  • the internal thread of the blind hole corresponds to an external thread of a fuel connector of the fuel injector designed as a threaded bolt.
  • a through opening of the receiving element and the surface of the receiving element facing away from the cylinder can be predetermined in the assembled state by fastening the receiving element to the cylinder head, so that an arrangement of the fuel injection valve in an installation channel of the cylinder head and the through opening of the receiving element in a preposition is possible, the prepositioning of the receiving element simultaneously leading to prepositioning of the surface of the receiving element facing away from the cylinder.
  • the arrangement is characterized in that the fuel injection valve is in the preposition with respect to the installation duct and the through opening with respect to the Receiving element of the fuel distributor is arranged with little play and at the same time non-rotatably and the fuel nozzle of the fuel injector has a protrusion over the surface facing away from the cylinder.
  • the fixing element has an internal polygon into which a tool engages to carry out a rotational movement of the fixing element that fixes the fuel injection valve on the receiving element.
  • the inner polygon is arranged on a side of the fixing element opposite the blind hole of the fixing element.
  • the fixing element is connected to the fuel injection valve (injector), which is formed from the injector fuselage and an injector tip, with the injector tip and injector fuselage and fuel nozzle of the fuel injection valve and the blind hole and the internal polygon of the fixing element on a common one Longitudinal axis.
  • injector injector
  • the contact surfaces are flat surfaces, by means of which an axial fixation and radial alignment of the fuel injection valve in the cylinder head and on the cylinder head and respectively with respect to the receiving element of the fuel rail is brought about by the cylinder-facing surface of the fixing element compared to the previously pre-positioned surface facing away from the cylinder of the receiving element is brought into abutment, which can be clamped axially on the surface of the receiving element facing away from the cylinder by the execution of a rotary movement of the fixing element, with a radial alignment of the fuel injection valve taking place at the same time, since the contact surfaces advantageously also effect a final positioning of the fuel injection valve due to the axial clamping ,
  • the invention relates to a fuel injection system of an internal combustion engine with an arrangement for connecting at least one fuel injection valve to a fuel distributor of the fuel injection system, the at least one fuel injection valve being detachably fastened to a receiving element of the fuel distributor by means of a fixing element, it being provided that a surface of the receiving element of the fuel distributor facing away from the cylinder and a cylinder-facing surface of the fixing element in the assembled state of the cylinder head and fuel distributor and the fuel injection valve are designed as contact surfaces, by means of which attachment of the fixing element to the fuel injection valve enables axial fixing and radial alignment of the fuel injection valve in and on the cylinder head or in the receiving element of the fuel rail is.
  • the figure shows a section through the longitudinal central axis of a fuel injection valve in its installation situation in a cylinder head with a cylinder head, also shown in section, and an associated fuel rail.
  • the figure shows a cylinder head 100 of an internal combustion engine in a sectional view through a central axis X M of a fuel injector 300, which is arranged in the cylinder head 100.
  • a fuel distribution is arranged in the manner of a fuel distributor 200, in particular a fuel distributor rail - also called a rail - on which a plurality of fuel injection valves 300, as shown in the figure, are usually arranged.
  • the fuel distributor rail 200 serves to store fuel under high pressure and to distribute the fuel to the plurality of fuel injection valves 300, which are designed in particular as high-pressure injection valves.
  • the high-pressure injection valves 300 and the fuel rail 200 (rail) are designed, for example, for operating pressures above 400 bar.
  • the fuel injection valves 300 inject the fuel required for the combustion process under high pressure into a combustion chamber 115 of the internal combustion engine.
  • the fuel is usually compressed upstream of the fuel rail 200 by means of a high-pressure pump and conveyed into the fuel rail 200 via a high-pressure line in a quantity-controlled manner.
  • the fuel passes through a channel-like opening 201 from the rail to the fuel injection valves 300, which has a correspondingly adapted opening 301.
  • the flows through the openings 201, 301 Fuel from the rail 200 into the at least one or more fuel injection valve (s) 300.
  • the arrangement is advantageously designed as a fuel injection system for high-pressure injection in internal combustion engines, the fuel injection system being provided in particular for mixture-compressing, spark-ignited internal combustion engines.
  • the fuel injection system is particularly suitable for direct gasoline injection, especially for direct-injection, gas-turbocharged gasoline engines.
  • the fuel rail 200 comprises, for each fuel injector 300 of the usually several fuel injectors 300 arranged on the fuel rail 200, a receiving element 210 in the manner of a cup 210 or a corresponding number of receiving elements 210.
  • a cup 210 represents a component, in particular a cylindrical component, which has a through opening which, according to the invention, has different geometrical designs in sections or cup sections 210A and 210B along the longitudinal extent of the through opening, as will be explained in detail below.
  • the subject matter of the invention is an arrangement that serves to connect the fuel injection valve 300 to the cup 210 of the fuel-carrying component, in particular the fuel rail 200.
  • the arrangement according to the invention is, for example, a fuel rail 200, which is arranged on the side of a cylinder block, in particular the cylinder head 100 of the cylinder block.
  • the fuel rail 200 is fixed to the cylinder head 100 via fastening elements, not shown.
  • the fuel injection valves 300 extending from the fuel rail 200 are arranged essentially at right angles to the cylinder pistons in the cylinder block or — see figure — leading obliquely downward to the combustion chamber 115.
  • an injector fuselage 340 of the fuel injection valve 300 is supported in the installation channel 110 of the cylinder head 100 designed as a receiving bore.
  • the previous support of the fuel injection valves 300 in the installation channel 110 of the cylinder head 100 was previously disadvantageous on a step 110A of the installation channel 110 of the cylinder head 100 via a step 340A of the injector fuselage 340 of the fuel injection valve 300.
  • the previous support of the fuel injection valve 300 in the cylinder head 100 leads to the introduction of structure-borne noise into the cylinder head 100 and the adjacent components such as a cylinder crankcase, a cylinder head cover and the fuel rail 200.
  • the lateral arrangement of the fuel injection valves 300 in the cylinder head 100 here eliminates the problem of the small installation space available to the side of the cylinder head 100 and at the same time the problem of the transmission of structure-borne noise of the fuel injection valves 300 to the cylinder head 100, in particular to the adjacent components of the fuel injection valve 300 or of fuel injection valves 300 is released, as will be explained in detail below.
  • a fixing element 330 of the fuel injection valve 300 which is formed separately from the fuel injection valve 300, represents the actual component for connecting the fuel injection valve 300 to the cup 210 of the fuel rail 200 in a so-called assembly state, as will also be explained.
  • an axial fastening area is embodied on the fuel injection valve 300 so that the fuel injection valve 300 can be fastened to the fuel rail 200, in particular to the cup 210, by means of the fixing element 330.
  • the fuel nozzle 302 is designed as a bolt which, viewed in the axial direction X M , has a projection in the assembled state over the surface A210 of the cup 210 facing away from the cylinder.
  • the bolt 302 has an external thread 302A at least in the region of the protrusion.
  • the fuel injection valve 300 is positioned in the cup 210 in a stationary and, in particular, non-rotatable manner, so that, according to the invention, the surface A210 of the cup 210 facing away from the cylinder can serve as a predeterminable mounting surface which can be predetermined in three-dimensional space.
  • a fuel injector 300 in the assembled state represents an assembly part which comprises the fuel injector 300 with fuel connector 302 per se and the fixing element 330.
  • the fixing element 330 is connected to the fuel injection valve 300 (injector), which is formed from the injector body 340 and an injector tip 350, which are mostly cylindrical, as is shown in the figure.
  • a circumferential seal 350A is arranged on the injector tip 350, which ensures the fuel-side sealing of the installation channel 110, in particular a fuel-side seal of the injector tip 350 with respect to the installation channel 110 of the cylinder head 100 and thus ultimately with respect to the combustion chamber 115 in the cylinder block.
  • Fixing element 330, injector fuselage 340 and injector tip 350 lie on an axis X, which is designed as the longitudinal central axis X M of the fuel injection valve 300.
  • the fuel injection valve 300 comprises a transition element 320, which branches off from the injector fuselage, the transition element 320 merging into a socket element 360 (not shown in detail), via which the electrical power supply to the fuel injection valve 300 for controlling the injection takes place, which likewise comes out slightly from the cylinder head 100 Internal combustion engine protrudes.
  • the fixing element 330 has a blind hole 330A which, in the assembled state, faces the surface 210 of the cup 210 facing away from the cylinder.
  • the blind hole 330A is provided with an internal thread 330A-1, which corresponds to the external thread 302A of the fuel connector 302 designed as a threaded bolt.
  • a surface A330 facing the cylinder in the assembled state is formed around the blind bore 330A.
  • the cylinder-facing surface A210 (hereinafter also referred to as the cup-side contact surface) of the cup 210 and the cylinder-facing surface A330 (hereinafter also referred to as the fixing element-side contact surface) of the fixing element 330 form contact surfaces A210, A330, by means of which axial fixing and radial alignment of the fuel injection valve 300 in the cylinder head 100 on the cup 210 of the fuel rail 200 is effected.
  • the fixing element 330 has an internal polygon 330B which, by means of a tool which engages in the internal polygon 330B, permits a screwing movement of the fixing element 330 with respect to the fuel injection valve 300 which has been pre-positioned in the cup 210 in a rotationally secure manner.
  • the fuel injection valve 300 has a slight play in relation to the through opening in the cup 210 and the installation channel 110 in the cylinder head, so that starting from the rotationally secure pre-positioning after the screwing movement of the fixing element 330 has been carried out relative to the cup 210, it has an axial end alignment and an axial end positioning of the Fuel injection valve 300 comes opposite the cup 210 and opposite the installation channel 110 in the cylinder head 100.
  • screwing the fixing element 330 results in a two-dimensional final alignment and final positioning of the fuel injection valve 300 in the cylinder head 100 with the aid of the positioned and appropriately aligned cup 210 on the cylinder head 100, which is arranged between the cylinder head 100 and the fixing element 330.
  • the assembly was carried out in such a way that the fuel injection valve 300 is inserted into the installation duct 115 before the assembly of the fuel rail 200.
  • the fuel nozzle 302 protrudes from the cylinder head 100.
  • the fuel injection valves 300 are independently pre-positioned via the injector tip 350 in the installation channel 110 when the fuel injection valves 300 are inserted in such a way that the injector tip 350 only comes into contact with the installation channel 110 with the seal 350A, while the injector body 340 has no contact points with the installation channel 110 ,
  • the ring seal represents a first seal arrangement DA1 between the combustion chamber 115 and the installation duct 115 of the cylinder head 100.
  • the structure-borne noise of the injector 300 is thus only slightly transmitted from the injector tip 350 to the cylinder head 100 via the structure-borne noise-damping seal 350.
  • a corresponding distance is also formed between the injector body 340 and the installation channel 110, which prevents direct transmission, in particular direct transmission of sound waves from the injector body 340 to the cylinder head 100.
  • connection within the first sealing arrangement DA1 is still so flexible that the distance within certain tolerances between the longitudinal axis of the installation channel 110 in the cylinder head 100 and the longitudinal central axis X M of the fuel injector 300 can be brought into agreement relative to one another by the fixing by means of the fixing element 330.
  • the through opening of the cup 210 of the fuel rail 200 is pushed onto the fuel nozzle 302 such that only the protrusion of the fuel nozzle 302 protrudes on the side of the cup 201 facing away from the cylinder.
  • the through opening which is formed in sections or cup sections 210A and 210B of the cup 210, faces the outer surface of the fuel nozzle 302 also only has a slight backlash, so that the previously described pre-positioning or pre-positioning of the fuel injection valve 300 occurs, the cup 210 of the fuel rail 200 being fastened to a position provided for this purpose within the cylinder head, as is not shown in more detail.
  • the pre-positioned fuel injector 300 is secured against rotation on the cup 210.
  • the fuel injector 300 is then fixed via the fixing element 330.
  • the fixing element 330 is screwed with its internal thread 330A-1 onto the external thread 302A of the fuel nozzle, so that the contact surfaces A210, A330 come into contact, whereby the screwing action causes an axial pull-in torque, which brings the fuel injection valve 300 axially into its end position.
  • the radial alignment of the longitudinal center axis X M of the fuel injection valve 300 with respect to the longitudinal axis of the installation channel 110 takes place via the contact surfaces A210, A330, so that the fuel injection valve 300 is also brought radially into its end position.
  • the longitudinal center axis X M of the fuel injector 300 can be displaced by a small angular amount after the prepositioning relative to the longitudinal axis of the installation channel 110, whereby a straight fit of the fuel injection valve 300 is always ensured in the installation channel 110, as a result of which contact points between the injector body 340 and the installation channel 110 of the cylinder head 100 can be safely avoided.
  • the fuel injector 300 is fastened to the fuel rail 200 in a very simple and secure manner, with almost no play, which is at the same time non-rotatable and which is able to do so within the scope of the available or deliberately provided tolerances during the pre-positioning Assembled state to compensate for the existing tolerances of the components connected to each other, the overall connection requiring only a small space.
  • connection which requires little installation space, is particularly advantageous, particularly in the case of a lateral injector position, as has already been explained.
  • the connection also ensures that high pressures of over 400 bar can be present at the fuel injection valve 300, since the tightening element of the fixing element 330 provides not only the forces for the final alignment, but also the forces for sealing a second sealing arrangement DA2 and a third sealing arrangement DA3.
  • the second sealing arrangement DA2 provides a seal between the through opening in the cup and the installation channel 115.
  • the third sealing arrangement DA3 provides a seal between the contact surfaces A210, A330 of the cup 210 and the fixing element 330.
  • sealing systems which can be used for both sealing arrangements DA2, DA3 or two of the sealing systems mentioned below are used in combination for one or the other sealing arrangement in combination.
  • the following sealing systems can be used: a cone-cone sealing seat, a hemisphere-cone sealing seat, a metal bead seal, a bite edge, adhesive bonding, an O-ring, a hemp tape or a non-ferrous metal sealing ring.
  • FIG. 1 To illustrate the sealing arrangements according to the invention is in Figure 1 an embodiment shown, in which the second sealing arrangement DA2 is designed as a cone-cone sealing seat and the third sealing arrangement DA3 as a metal bead seal.
  • the second cup section 210B of the through opening of the cup 210 is conical, so that a cone formed on the fuel injection valve 300 between an intermediate connection 303 and the fuel connection 302 engages in the conical through opening of the second cup section 210B in the assembled state, thereby forming the corresponding sealing seat is.
  • the second cup section 210B merges into the first cup section 210A, which is cylindrical and forms the fuel nozzle 302 at the end.
  • the intermediate connector 303 does not necessarily have to be arranged between the injector body 340 and the cone.
  • the third sealing arrangement DA3 takes place via the metal bead seal, with opposing beads in the cup 210 and in the fixing element 330 surrounding the contact surfaces A210, A330 S210 and S330 are formed.
  • a sealing element in particular a copper seal, is inserted, which, after appropriate attachment of the fixing element 330 and tensioning of the fuel injection valve 300, as already explained above, ensures a tightness between cup 210 and fixing element 300.
  • the invention thus creates a possibility of simple axial fixation and radial alignment of the fuel injection valve 300 in combination with the sealing of the fuel injection valve 300 with respect to the fuel rail 300 and a low-noise arrangement of the fuel injection valve 300 in the installation channel 110.
  • the assembly is based on the following steps: a) inserting the fuel injection valve 300 into the cylinder head 100 into the opening provided for this purpose in the cylinder head 100 and b) placing the fuel rail 200 via the passage opening in the fuel rail 200 onto the bolt-like extension of the fuel injector designated as fuel nozzle 302 300 and c) fixing the fuel rail 200 to the cylinder head 100, which serves as a mounting element for the fuel rail 200, and finally d) fixing the fuel injector 300 by means of the fixing element 330 in the manner of a screw head to the fuel rail 200.

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

Abstract

Die Erfindung betrifft eine Anordnung zur Verbindung mindestens eines Brennstoffeinspritzventils (300) mit einem Kraftstoffverteiler (200) einer Kraftstoffeinspritzanlage einer Brennkraftmaschine, der an einem Zylinderkopf (100) lösbar befestigt ist, wobei das mindestens eine Brennstoffeinspritzventil (300) mittels einem Fixierungselement (330) an einem Aufnahmeelement (210) des Kraftstoffverteilers (200) lösbar befestigt ist.Es ist vorgesehen, dass eine zylinderabgewandte Fläche (A210) des Aufnahmeelementes (210) des Kraftstoffverteilers (200) und eine zylinderzugewandte Fläche (A330) des Fixierungselementes (330) im Zusammenbauzustand von Zylinderkopf (100) und Kraftstoffverteiler (200) sowie dem Brennstoffeinspritzventil (300) als Kontaktflächen (A210, A330) ausgebildet sind, mittels denen durch Anbringung des Fixierungselementes (330) an dem Brennstoffeinspritzventil (300) eine axiale Fixierung und eine radiale Ausrichtung des Brennstoffeinspritzventils (300) in dem Zylinderkopf (100) respektive in dem Aufnahmeelement (210) der Kraftstoffverteilerleiste (200) bewirkbar ist.The invention relates to an arrangement for connecting at least one fuel injection valve (300) to a fuel distributor (200) of a fuel injection system of an internal combustion engine, which is detachably attached to a cylinder head (100), the at least one fuel injection valve (300) being attached by means of a fixing element (330) A receiving element (210) of the fuel distributor (200) is detachably fastened. It is provided that a surface (A210) of the receiving element (210) of the fuel distributor (200) facing away from the cylinder and a surface (A330) of the fixing element (330) facing the cylinder in the assembled state of The cylinder head (100) and the fuel distributor (200) and the fuel injector (300) are designed as contact surfaces (A210, A330), by means of which, by attaching the fixing element (330) to the fuel injector (300), an axial fixation and a radial alignment of the fuel injector ( 300) in the cylinder body pf (100) or in the receiving element (210) of the fuel rail (200) can be effected.

Description

Die Erfindung betrifft eine Anordnung zur Verbindung mindestens eines Brennstoffeinspritzventils mit einem Kraftstoffverteiler einer Kraftstoffeinspritzanlage einer Brennkraftmaschine, der an einem Zylinderkopf lösbar befestigt ist, wobei das mindestens eine Brennstoffeinspritzventil mittels einem Fixierungselement an einem Aufnahmeelement des Kraftstoffverteilers lösbar befestigt ist.The invention relates to an arrangement for connecting at least one fuel injector to a fuel distributor of a fuel injection system of an internal combustion engine, which is releasably attached to a cylinder head, the at least one fuel injector being releasably attached to a receiving element of the fuel distributor by means of a fixing element.

Die Druckschrift WO 2016/020255 A1 beschreibt eine Anordnung zur Verbindung eines Anschlussteils eines Brennstoffeinspritzventils mit einer Tasse einer Brennstoff führenden Komponente, wobei eine Verbindungsklammer vorgesehen ist. Die Verbindungsklammer verbindet im montierten Zustand das Anschlussteil des Brennstoffeinspritzventils mit der Tasse. Hierbei sind eine an dem Anschlussteil vorgesehene Kontaktkontur und eine an der Verbindungsklammer vorgesehene Kontaktkontur, an denen ein Kontakt zwischen dem Anschlussteil und der Verbindungsklammer im montierten Zustand zustande kommt, so aneinander angepasst ausgestaltet, dass eine Lagerung des Anschlussteils an der Verbindungsklammer gewährleistet ist, die ein Verschwenken des Anschlussteils in Bezug auf eine Längsachse der Tasse ermöglicht.The publication WO 2016/020255 A1 describes an arrangement for connecting a connection part of a fuel injector to a cup of a fuel-carrying component, a connecting clip being provided. In the assembled state, the connecting clip connects the connection part of the fuel injector to the cup. In this case, a contact contour provided on the connecting part and a contact contour provided on the connecting clip, on which contact between the connecting part and the connecting clip comes about in the assembled state, are designed so that they are adapted to one another in such a way that the connecting part is supported on the connecting clip, which ensures that a Allows pivoting of the connecting part with respect to a longitudinal axis of the cup.

Außerdem ist aus der Druckschrift WO 2013/170998 A1 eine weitere Anordnung zur Hochdruckeinspritzung bei Brennkraftmaschinen bekannt. Sie umfasst einen Brennstoffverteiler und mehrere Brennstoffeinspritzventile. Dabei ist jedes der Brennstoffeinspritzventile an einer Tasse des Brennstoffverteilers angeordnet. Zumindest eines der Brennstoffeinspritzventile ist durch ein Halteelement an der zugeordneten Tasse befestigt. Das Halteelement weist eine Stützfläche auf. Die Tasse weist an einer Unterseite eine Anlagefläche auf, mit der sich die Tasse mittels einer Dämpfungsschicht an der Stützfläche des Halteelementes abstützt. Das Halteelement ist an der Tasse fixiert. Das Brennstoffeinspritzventil weist ferner einen Bund auf, der an dem Halteelement abgestützt ist. Durch die Dämpfungsschicht ist eine Bedämpfung von Schwingungen und somit eine Reduzierung von Geräuschemissionen möglich.It is also from the publication WO 2013/170998 A1 a further arrangement for high pressure injection in internal combustion engines is known. It includes a fuel rail and several fuel injectors. Each of the fuel injection valves is arranged on a cup of the fuel distributor. At least one of the fuel injection valves is attached to the associated cup by a holding element. The holding element has a support surface. The underside of the cup has a contact surface with which the cup is supported on the supporting surface of the holding element by means of a damping layer. The holding element is fixed to the cup. The fuel injector also has a collar which is supported on the holding element. The damping layer makes it possible to dampen vibrations and thus reduce noise emissions.

Die Druckschrift DE 10 2008 002 122 A1 offenbart einen Niederhalter für eine Brennstoffeinspritzvorrichtung, die wenigstens ein Brennstoffeinspritzventil, eine Aufnahmebohrung für das Brennstoffeinspritzventil und einen Anschlussstutzen einer Brennstoffverteilerleitung umfasst. Der Niederhalter ist zwischen einer Schulter des Brennstoffeinspritzventils und einer Endfläche des Anschlussstutzens einspannbar. Der Niederhalter weist ein teilringförmiges Grundelement auf, von dem sich aus ein axial nachgiebiger Niederhaltebügel erstreckt, der wenigstens zwei Stege, zwei Schrägabschnitte und zwei Anlageabschnitte besitzt. Das Grundelement ist als hochkant stehender Teilring ausgeführt, dessen Wandstärke der verwendeten Blechdicke entspricht. Das Grundelement geht derart in die zwei Stege des Niederhaltebügels über, dass die sich aus der Ebene des Grundelementes heraus erstreckenden Stege mit ihren Blechbreitseiten gegenüberstehen und die Stege an ihrem dem Grundelement abgewandten Ende derart gebogen sind, dass von den umgebogenen Endbereichen der Stege aus sich die Schrägabschnitte so erstrecken, dass sich nun die Schnittkanten im Blech gegenüberstehen.The publication DE 10 2008 002 122 A1 discloses a hold-down device for a fuel injection device, which comprises at least one fuel injection valve, a receiving bore for the fuel injection valve and a connecting piece of a fuel distributor line. The hold-down device can be clamped between a shoulder of the fuel injection valve and an end face of the connecting piece. The hold-down device has a part-ring-shaped base element, from which an axially flexible hold-down bracket extends, which has at least two webs, two inclined sections and two contact sections. The basic element is designed as an upright partial ring, the wall thickness of which corresponds to the sheet thickness used. The base element merges into the two webs of the hold-down bracket in such a way that the webs which extend out of the plane of the base element face each other with their sheet metal broad sides and the webs are bent at their end facing away from the base element in such a way that the bent end regions of the webs give rise to them Extend sloping sections so that the cut edges in the sheet are now facing each other.

Die Verbindungsklammer aus der Anordnung gemäß der Druckschrift WO 2016/020255 A1 und der Niederhalter gemäß der Druckschrift DE 10 2008 002 122 A1 stellen geometrisch kompliziert zu fertigende Gebilde dar. Das Halteelement gemäß der Druckschrift WO 2013/170998 A1 ist hinsichtlich der Geometrie bereits etwas einfacher aufgebaut.The connecting bracket from the arrangement according to the document WO 2016/020255 A1 and the hold-down according to the document DE 10 2008 002 122 A1 represent geometrically complicated structures to be manufactured. The holding element according to the document WO 2013/170998 A1 is somewhat simpler in terms of geometry.

Eine weitere Anordnung zur Verbindung mindestens eines Brennstoffeinspritzventils an einem Kraftstoffverteiler einer Kraftstoffeinspritzanlage einer Brennkraftmaschine geht aus der Druckschrift DE 10 2016 210 573 A1 hervor, wobei das mindestens eine Brennstoffeinspritzventil mittels eines Halteelementes an einer Tasse des Kraftstoffverteilers lösbar befestigt ist. Die Tasse weist mindestens einen Spalt auf, der in der Zusammenbausituation einen Klemmbund eines Anschlusselementes des Brennstoffeinspritzventils zugänglich macht, da das Anschlusselement des Brennstoffeinspritzventils in der Zusammenbausituation in der Tasse steckt, wobei der Klemmbund in der Zusammenbausituation von Klemmbacken des in den Spalt geschobenen Halteelementes in der Tasse fixiert ist.A further arrangement for connecting at least one fuel injection valve to a fuel distributor of a fuel injection system of an internal combustion engine is given in the document DE 10 2016 210 573 A1 emerges, wherein the at least one fuel injector is releasably attached to a cup of the fuel distributor by means of a holding element. The cup has at least one gap which, in the assembly situation, makes a clamping collar of a connecting element of the fuel injector accessible, since the connecting element of the fuel injector is in the cup in the assembling situation, the clamping collar in the assembling situation of jaws of the holding element pushed into the gap in the Cup is fixed.

Der Erfindung liegt von dem Stand der Technik ausgehend die Aufgabe zugrunde, eine andere alternative vorteilhafte Verbindung zwischen einem Brennstoffeinspritzventil und einem Kraftstoffverteiler einer Brennkraftmaschine zu schaffen.Starting from the prior art, the invention is based on the object of creating another alternative advantageous connection between a fuel injection valve and a fuel distributor of an internal combustion engine.

Ausgangspunkt der Erfindung ist eine Anordnung zur Verbindung mindestens eines Brennstoffeinspritzventils mit einem Kraftstoffverteiler einer Kraftstoffeinspritzanlage einer Brennkraftmaschine, der an einem Zylinderkopf lösbar befestigt ist, wobei das mindestens eine Brennstoffeinspritzventil mittels einem Fixierungselement an einem Aufnahmeelement des Kraftstoffverteilers lösbar befestigt ist.The starting point of the invention is an arrangement for connecting at least one fuel injection valve to a fuel distributor of a fuel injection system of an internal combustion engine, which is releasably attached to a cylinder head, the at least one fuel injection valve being releasably attached to a receiving element of the fuel distributor by means of a fixing element.

Erfindungsgemäß ist vorgesehen, dass eine zylinderabgewandte Fläche des Aufnahmeelementes des Kraftstoffverteilers und eine zylinderzugewandte Fläche des Fixierungselementes im Zusammenbauzustand von Zylinderkopf und Kraftstoffverteiler sowie dem Brennstoffeinspritzventil als Kontaktflächen ausgebildet sind, mittels denen durch Anbringung des Fixierungselementes an dem Brennstoffeinspritzventil eine axiale Fixierung und eine radiale Ausrichtung des Brennstoffeinspritzventils in dem Zylinderkopf respektive in dem Aufnahmeelement des Kraftstoffverteilers bewirkbar ist. Eine solche Kontaktflächen-Positionierung der genannten Bauteile zueinander erlaubt eine exakte Positionierung, ist robust und einfach ausführbar.According to the invention, it is provided that a surface of the receiving element of the fuel distributor facing away from the cylinder and a surface of the fixing element facing the cylinder in the assembled state of the cylinder head and fuel distributor and the fuel injector are designed as contact surfaces, by means of which the fixing element is attached to the fuel injector to fix axially and radially align the fuel injector can be effected in the cylinder head or in the receiving element of the fuel distributor. Such positioning of the contact surfaces of the above-mentioned components relative to one another permits exact positioning, is robust and can be carried out easily.

Bevorzugt ist vorgesehen, dass das Fixierungselement ein Schraubkopf ist, der eine Sacklochbohrung aufweist, die mit einem Innengewinde versehen ist, die im Zusammenbauzustand der zylinderabgewandten Fläche des Aufnahmeelementes zugewandt ist, wobei die zylinderzugewandte Fläche um die Sacklochbohrung des Fixierungselementes herum ausgebildet.It is preferably provided that the fixing element is a screw head which has a blind hole which is provided with an internal thread which, in the assembled state, faces the surface of the receiving element which faces away from the cylinder, the surface facing the cylinder being formed around the blind hole of the fixing element.

Ferner ist bevorzugt vorgesehen, dass das Innengewinde der Sacklochbohrung mit einem Außengewinde eines als Gewindebolzen ausgebildeten Brennstoffstutzens des Brennstoffeinspritzventils korrespondiert.Furthermore, it is preferably provided that the internal thread of the blind hole corresponds to an external thread of a fuel connector of the fuel injector designed as a threaded bolt.

Dadurch ist es bevorzugt in vorteilhafter Weise möglich, dass eine Durchgangsöffnung des Aufnahmeelementes und die zylinderabgewandte Fläche des Aufnahmeelementes im Zusammenbauzustand durch Befestigung des Aufnahmeelementes an dem Zylinderkopf vorgebbar ausgerichtet werden kann, sodass eine Anordnung des Brennstoffeinspritzventils in einem Einbaukanal des Zylinderkopfes und der Durchgangsöffnung des Aufnahmeelementes in einer Vorposition möglich ist, wobei die Vorpositionierung des Aufnahmeelementes gleichzeitig zu einer Vorpositionierung der zylinderabgewandten Fläche des Aufnahmeelementes führt.As a result, it is preferably possible in an advantageous manner that a through opening of the receiving element and the surface of the receiving element facing away from the cylinder can be predetermined in the assembled state by fastening the receiving element to the cylinder head, so that an arrangement of the fuel injection valve in an installation channel of the cylinder head and the through opening of the receiving element in a preposition is possible, the prepositioning of the receiving element simultaneously leading to prepositioning of the surface of the receiving element facing away from the cylinder.

Erfindungsgemäß zeichnet sich die Anordnung dadurch aus, dass das Brennstoffeinspritzventil in der Vorposition gegenüber dem Einbaukanal und der Durchgangsöffnung gegenüber dem Aufnahmeelement des Kraftstoffverteilers mit geringem Spiel und gleichzeitig verdrehsicher angeordnet ist und der Brennstoffstutzen des Brennstoffeinspritzventils einen Überstand über die zylinderabgewandte Fläche aufweist.According to the invention, the arrangement is characterized in that the fuel injection valve is in the preposition with respect to the installation duct and the through opening with respect to the Receiving element of the fuel distributor is arranged with little play and at the same time non-rotatably and the fuel nozzle of the fuel injector has a protrusion over the surface facing away from the cylinder.

Zudem ist vorgesehen, dass das Fixierungselement einen Innenmehrkant aufweist, in den zur Ausübung einer das Brennstoffeinspritzventil an dem Aufnahmeelement fixierenden Drehbewegung des Fixierungselementes ein Werkzeug eingreift. Der Innenmehrkant ist auf einer der Sacklochbohrung des Fixierungselementes gegenüberliegende Seite des Fixierungselementes angeordnet.In addition, it is provided that the fixing element has an internal polygon into which a tool engages to carry out a rotational movement of the fixing element that fixes the fuel injection valve on the receiving element. The inner polygon is arranged on a side of the fixing element opposite the blind hole of the fixing element.

Das Fixierungselement ist im Zusammenbauzustand - unter Zwischenanordnung des Aufnahmeelementes des Kraftstoffverteilers - mit dem Brennstoffeinspritzventil (Injektor) verbunden, der aus dem Injektorrumpf und einer Injektorspitze ausgebildet ist, wobei Injektorspitze und Injektorrumpf und Brennstoffstutzen des Brennstoffeinspritzventils und die Sacklochbohrung und der Innenmehrkant des Fixierungselementes auf einer gemeinsamen Längsachse liegen.In the assembled state, the fixing element is connected to the fuel injection valve (injector), which is formed from the injector fuselage and an injector tip, with the injector tip and injector fuselage and fuel nozzle of the fuel injection valve and the blind hole and the internal polygon of the fixing element on a common one Longitudinal axis.

Bevorzugt ist vorgesehen, dass die Kontaktflächen ebene Flächen sind, mittels denen eine axiale Fixierung und radiale Ausrichtung des Brennstoffeinspritzventils in dem Zylinderkopf und an dem Zylinderkopf und respektive gegenüber dem Aufnahmeelement der Kraftstoffverteilerleiste bewirkt wird, indem die zylinderzugewandte Fläche des Fixierungselementes gegenüber der zuvor vorpositionierten zylinderabgewandten Fläche des Aufnahmeelementes zur Anlage gebracht wird, die durch die Ausübung einer Drehbewegung des Fixierungselementes axial an der zylinderabgewandten Fläche des Aufnahmeelementes verspannbar ist, wobei gleichzeitig eine radiale Ausrichtung des Brennstoffeinspritzventils erfolgt, da die Kontaktflächen durch die axiale Verspannung in vorteilhafter Weise auch eine Endpositionierung des Brennstoffeinspritzventils bewirken.It is preferably provided that the contact surfaces are flat surfaces, by means of which an axial fixation and radial alignment of the fuel injection valve in the cylinder head and on the cylinder head and respectively with respect to the receiving element of the fuel rail is brought about by the cylinder-facing surface of the fixing element compared to the previously pre-positioned surface facing away from the cylinder of the receiving element is brought into abutment, which can be clamped axially on the surface of the receiving element facing away from the cylinder by the execution of a rotary movement of the fixing element, with a radial alignment of the fuel injection valve taking place at the same time, since the contact surfaces advantageously also effect a final positioning of the fuel injection valve due to the axial clamping ,

Vorgesehen sind,

  • eine erste Dichtungsanordnung zwischen Brennraum und dem Einbaukanal des Zylinderkopfes, die als Ringdichtung ausgebildet ist, die eine Spitze des Brennstoffeinspritzventils (Injektorspitze) gegenüber dem Einbaukanal abdichtet, und
  • eine zweite Dichtungsanordnung zischen der Durchgangsöffnung des Aufnahmeelementes des Kraftstoffverteilers und dem Einbaukanal des Brennstoffeinspritzventils, und
  • eine dritte Dichtungsanordnung zwischen den Kontaktflächen des Aufnahmeelementes des Kraftstoffverteilers und des Fixierungselementes, die in der Beschreibung näher erläutert sind.
Are provided
  • a first seal arrangement between the combustion chamber and the installation channel of the cylinder head, which is designed as an annular seal that seals a tip of the fuel injector (injector tip) from the installation channel, and
  • a second seal arrangement between the through opening of the receiving element of the fuel distributor and the installation channel of the fuel injector, and
  • a third sealing arrangement between the contact surfaces of the receiving element of the fuel rail and the fixing element, which are explained in more detail in the description.

Erfindungsgemäß wird ein Verfahren zur Herstellung einer Anordnung zur Verbindung mindestens eines Brennstoffeinspritzventils mit einem Kraftstoffverteiler einer Kraftstoffeinspritzanlage einer Brennkraftmaschine, der an einem Zylinderkopf lösbar befestigt ist, wobei das mindestens eine Brennstoffeinspritzventil mittels einem Fixierungselement an einem Aufnahmeelement des Kraftstoffverteilers lösbar befestigt ist, zur Verfügung gestellt, welches durch folgende Montageschritte gekennzeichnet ist:

  1. a) Einführen eines Brennstoffeinspritzventils in einen Zylinderkopf in die dafür im Zylinderkopf vorgesehene Öffnung (Einbaukanal).
  2. b) Aufsetzen eines Kraftstoffverteilers über eine Durchgangsöffnung in einem Aufnahmeelement des Kraftstoffverteilers auf eine als Brennstoffstutzen ausgebildete bolzenartige Verlängerung des Brennstoffeinspritzventils.
  3. c) Fixierung des Kraftstoffverteilers an dem Zylinderkopf, der als Anbauelement für den Kraftstoffverteiler dient.
  4. d) Fixierung des Brennstoffeinspritzventils mittels einem Fixierungselement an dem Kraftstoffverteiler.
According to the invention, a method for producing an arrangement for connecting at least one fuel injection valve to a fuel distributor of a fuel injection system of an internal combustion engine, which is detachably attached to a cylinder head, the at least one fuel injection valve being detachably attached to a receiving element of the fuel distributor by means of a fixing element, which is characterized by the following assembly steps:
  1. a) Inserting a fuel injector into a cylinder head into the opening provided in the cylinder head (installation channel).
  2. b) placing a fuel distributor via a through opening in a receiving element of the fuel distributor on a bolt-like extension of the fuel injector designed as a fuel nozzle.
  3. c) Fixing the fuel rail on the cylinder head, which serves as an attachment for the fuel rail.
  4. d) fixation of the fuel injector by means of a fixation element on the fuel rail.

Die Erfindung betrifft eine Kraftstoffeinspritzanlage einer Brennkraftmaschine mit einer Anordnung zur Verbindung mindestens eines Brennstoffeinspritzventils an einem Kraftstoffverteiler der Kraftstoffeinspritzanlage, wobei das mindestens eine Brennstoffeinspritzventil mittels einem Fixierungselement an einem Aufnahmeelement des Kraftstoffverteilers lösbar befestigt ist, wobei vorgesehen ist, dass eine zylinderabgewandte Fläche des Aufnahmeelementes des Kraftstoffverteilers und eine zylinderzugewandte Fläche des Fixierungselementes im Zusammenbauzustand von Zylinderkopf und Kraftstoffverteiler sowie dem Brennstoffeinspritzventil als Kontaktflächen ausgebildet sind, mittels denen durch Anbringung des Fixierungselementes an dem Brennstoffeinspritzventil eine axiale Fixierung und eine radiale Ausrichtung des Brennstoffeinspritzventils in und an dem Zylinderkopf respektive in dem Aufnahmeelement der Kraftstoffverteilerleiste bewirkbar ist.The invention relates to a fuel injection system of an internal combustion engine with an arrangement for connecting at least one fuel injection valve to a fuel distributor of the fuel injection system, the at least one fuel injection valve being detachably fastened to a receiving element of the fuel distributor by means of a fixing element, it being provided that a surface of the receiving element of the fuel distributor facing away from the cylinder and a cylinder-facing surface of the fixing element in the assembled state of the cylinder head and fuel distributor and the fuel injection valve are designed as contact surfaces, by means of which attachment of the fixing element to the fuel injection valve enables axial fixing and radial alignment of the fuel injection valve in and on the cylinder head or in the receiving element of the fuel rail is.

Die Erfindung wird nachfolgend anhand der zugehörigen Zeichnung erläutert.The invention is explained below with reference to the accompanying drawing.

Die Figur zeigt einen Schnitt durch die Längsmittelachse eines Brennstoffeinspritzventils in seiner Einbausituation in einem Zylinderkopf mit ebenfalls im Schnitt dargestelltem Zylinderkopf und einem zugehörigen Kraftstoffverteiler (Rail).The figure shows a section through the longitudinal central axis of a fuel injection valve in its installation situation in a cylinder head with a cylinder head, also shown in section, and an associated fuel rail.

Zunächst wird ein Anordnungskonzept eines Brennstoffeinspritzventils 300 in dem Zylinderkopf 100 erläutert.First, an arrangement concept of a fuel injection valve 300 in the cylinder head 100 is explained.

Die Figur zeigt einen Zylinderkopf 100 einer Brennkraftmaschine in einer Schnittansicht durch eine Mittelachse XM eines Brennstoffeinspritzventils 300, das in dem Zylinderkopf 100 angeordnet ist.The figure shows a cylinder head 100 of an internal combustion engine in a sectional view through a central axis X M of a fuel injector 300, which is arranged in the cylinder head 100.

An dem Zylinderkopf 100, der als Anbaustruktur dient, ist eine Kraftstoffverteilung in der Art eines Kraftstoffverteilers 200, insbesondere einer Kraftstoffverteilerleiste - auch Rail genannt - angeordnet, an der zumeist mehrere wie in der Figur gezeigte Brennstoffeinspritzventile 300 angeordnet sind.On the cylinder head 100, which serves as an add-on structure, a fuel distribution is arranged in the manner of a fuel distributor 200, in particular a fuel distributor rail - also called a rail - on which a plurality of fuel injection valves 300, as shown in the figure, are usually arranged.

Die Kraftstoffverteilerleiste 200 (Rail) dient zum Speichern von unter hohem Druck stehendem Brennstoff und zur Verteilung des Brennstoffs auf die mehreren Brennstoffeinspritzventile 300, die insbesondere als Hochdruckeinspritzventile ausgestaltet sind.The fuel distributor rail 200 (rail) serves to store fuel under high pressure and to distribute the fuel to the plurality of fuel injection valves 300, which are designed in particular as high-pressure injection valves.

Die Hochdruckeinspritzventile 300 und die Kraftstoffverteilerleiste 200 (Rail) sind beispielsweise für Betriebsdrücke von oberhalb 400 bar ausgelegt. Die Brennstoffeinspritzventile 300 spritzen den zum Verbrennungsvorgang notwendigen Brennstoff unter hohem Druck in einen Brennraum 115 der Brennkraftmaschine ein.The high-pressure injection valves 300 and the fuel rail 200 (rail) are designed, for example, for operating pressures above 400 bar. The fuel injection valves 300 inject the fuel required for the combustion process under high pressure into a combustion chamber 115 of the internal combustion engine.

Der Brennstoff wird stromauf der Kraftstoffverteilerleiste 200 zumeist über eine Hochdruckpumpe verdichtet und mengengesteuert über eine Hochdruckleitung in die Kraftstoffverteilerleiste 200 gefördert.The fuel is usually compressed upstream of the fuel rail 200 by means of a high-pressure pump and conveyed into the fuel rail 200 via a high-pressure line in a quantity-controlled manner.

Von der Kraftstoffverteilerleiste 200 ausgehend gelangt der Brennstoff über eine kanalartige Öffnung 201 vom Rail zu den Brennstoffeinspritzventilen 300, welches eine entsprechend angepasste Öffnung 301 aufweist. Mit anderen Worten, über die Öffnungen 201, 301 strömt der Brennstoff vom Rail 200 in das mindestens eine oder die mehreren Brennstoffeinspritzventil/e 300.Starting from the fuel rail 200, the fuel passes through a channel-like opening 201 from the rail to the fuel injection valves 300, which has a correspondingly adapted opening 301. In other words, the flows through the openings 201, 301 Fuel from the rail 200 into the at least one or more fuel injection valve (s) 300.

Die Anordnung ist in vorteilhafter Weise als Brennstoffeinspritzanlage zur Hochdruckeinspritzung bei Brennkraftmaschinen ausgestaltet, wobei die Brennstoffeinspritzanlage insbesondere für gemischverdichtende, fremdgezündete Brennkraftmaschinen vorgesehen ist. Speziell eignet sich die Brennstoffeinspritzanlage zur Benzindirekteinspritzung, insbesondere von direkteinspritzenden abgasturboaufgeladenen Ottomotoren.The arrangement is advantageously designed as a fuel injection system for high-pressure injection in internal combustion engines, the fuel injection system being provided in particular for mixture-compressing, spark-ignited internal combustion engines. The fuel injection system is particularly suitable for direct gasoline injection, especially for direct-injection, gas-turbocharged gasoline engines.

Die Kraftstoffverteilerleiste 200 umfasst je Brennstoffeinspritzventil 300 der zumeist mehreren an der Kraftstoffverteilerleiste 200 angeordneten Brennstoffeinspritzventile 300 ein Aufnahmeelement 210 in der Art einer Tasse 210 beziehungsweise eine entsprechende Anzahl von Aufnahmeelementen 210.The fuel rail 200 comprises, for each fuel injector 300 of the usually several fuel injectors 300 arranged on the fuel rail 200, a receiving element 210 in the manner of a cup 210 or a corresponding number of receiving elements 210.

Eine Tasse 210 stellt ein Bauteil, insbesondere ein zylindrisches Bauteil dar, welches eine Durchgangsöffnung aufweist, die in Abschnitten beziehungsweise Tassenabschnitten 210A und 210B entlang der Längserstreckung der Durchgangsöffnung erfindungsgemäß unterschiedlich geometrisch ausgebildet ist, wie noch detailliert erläutert wird.A cup 210 represents a component, in particular a cylindrical component, which has a through opening which, according to the invention, has different geometrical designs in sections or cup sections 210A and 210B along the longitudinal extent of the through opening, as will be explained in detail below.

Gegenstand der Erfindung ist eine Anordnung, die zum Verbinden des Brennstoffeinspritzventils 300 mit der Tasse 210 der Brennstoff führenden Komponente, insbesondere der Kraftstoffverteilerleiste 200, dient.The subject matter of the invention is an arrangement that serves to connect the fuel injection valve 300 to the cup 210 of the fuel-carrying component, in particular the fuel rail 200.

Bei der erfindungsgemäßen Anordnung handelt es sich beispielsweise um eine Kraftstoffverteilerleiste 200, die seitlich eines Zylinderblockes, insbesondere des Zylinderkopfes 100 des Zylinderblockes angeordnet ist.The arrangement according to the invention is, for example, a fuel rail 200, which is arranged on the side of a cylinder block, in particular the cylinder head 100 of the cylinder block.

Die Kraftstoffverteilerleiste 200 ist ortsfest über nicht näher dargestellte Befestigungselemente an dem Zylinderkopf 100 befestigt.The fuel rail 200 is fixed to the cylinder head 100 via fastening elements, not shown.

Bei der seitlichen Anordnung der Kraftstoffverteilerleiste 200 sind die von der Kraftstoffverteilerleiste 200 abgehenden Brennstoffeinspritzventile 300 gegenüber den Zylinderkolben im Zylinderblock im Wesentlichen rechtwinklig oder - siehe Figur - schräg nach unten zum Brennraum 115 führend angeordnet.In the case of the lateral arrangement of the fuel rail 200, the fuel injection valves 300 extending from the fuel rail 200 are arranged essentially at right angles to the cylinder pistons in the cylinder block or — see figure — leading obliquely downward to the combustion chamber 115.

Bei der herkömmlichen seitlichen Anordnung eines der Brennstoffeinspritzventile 300 stützt sich ein Injektorrumpf 340 des Brennstoffeinspritzventils 300 in dem als eine Aufnahmebohrung ausgestalteten Einbaukanal 110 des Zylinderkopfes 100 ab.In the conventional lateral arrangement of one of the fuel injection valves 300, an injector fuselage 340 of the fuel injection valve 300 is supported in the installation channel 110 of the cylinder head 100 designed as a receiving bore.

Die bisherige Abstützung der Brennstoffeinspritzventile 300 im Einbaukanal 110 des Zylinderkopfes 100 erfolgte bisher in nachteiliger Weise an einer Stufe 110A des Einbaukanals 110 des Zylinderkopfes 100 über eine Stufe 340A des Injektorrumpfes 340 des Brennstoffeinspritzventils 300. Die bisherige Abstützung des Brennstoffeinspritzventils 300 im Zylinderkopf 100 führt zur Einleitung von Körperschall in den Zylinderkopf 100 und die angrenzenden Bauteile wie ein Zylinderkurbelgehäuse, eine Zylinderkopfhaube und die Kraftstoffverteilerleiste 200.The previous support of the fuel injection valves 300 in the installation channel 110 of the cylinder head 100 was previously disadvantageous on a step 110A of the installation channel 110 of the cylinder head 100 via a step 340A of the injector fuselage 340 of the fuel injection valve 300. The previous support of the fuel injection valve 300 in the cylinder head 100 leads to the introduction of structure-borne noise into the cylinder head 100 and the adjacent components such as a cylinder crankcase, a cylinder head cover and the fuel rail 200.

Durch die hier vorliegende seitliche Anordnung der Brennstoffeinspritzventile 300 im Zylinderkopf 100 wird das Problem des seitlich des Zylinderkopfes 100 geringen zur Verfügung stehenden Bauraumes und zugleich das Problem der Übertragung des Körperschalls der Brennstoffeinspritzventile 300 auf den Zylinderkopf 100, insbesondere auf die angrenzenden Bauteile des Brennstoffeinspritzventils 300 oder der Brennstoffeinspritzventile 300 gelöst, wie nachfolgend im Detail noch erläutert wird.The lateral arrangement of the fuel injection valves 300 in the cylinder head 100 here eliminates the problem of the small installation space available to the side of the cylinder head 100 and at the same time the problem of the transmission of structure-borne noise of the fuel injection valves 300 to the cylinder head 100, in particular to the adjacent components of the fuel injection valve 300 or of fuel injection valves 300 is released, as will be explained in detail below.

Erfindungsgemäß stellt ein getrennt von dem Brennstoffeinspritzventil 300 ausgebildetes Fixierungselement 330 des Brennstoffeinspritzventils 300 das eigentliche Bauteil zum Verbinden des Brennstoffeinspritzventils 300 mit der Tasse 210 der Kraftstoffverteilerleiste 200 in einem sogenannten Zusammenbauzustand dar, wie ebenfalls noch erläutert wird.According to the invention, a fixing element 330 of the fuel injection valve 300, which is formed separately from the fuel injection valve 300, represents the actual component for connecting the fuel injection valve 300 to the cup 210 of the fuel rail 200 in a so-called assembly state, as will also be explained.

Als sogenannter Brennstoffstutzen 301 des Brennstoffeinspritzventils 300 ist ein axialer Befestigungsbereich am Brennstoffeinspritzventil 300 ausgeführt, damit das Brennstoffeinspritzventil 300 mittels dem Fixierungselement 330 an der Kraftstoffverteilerleiste 200, insbesondere an der Tasse 210 befestigt werden kann.As a so-called fuel nozzle 301 of the fuel injection valve 300, an axial fastening area is embodied on the fuel injection valve 300 so that the fuel injection valve 300 can be fastened to the fuel rail 200, in particular to the cup 210, by means of the fixing element 330.

Der Brennstoffstutzen 302 ist als Bolzen ausgebildet, der in axialer Richtung XM gesehen im Zusammenbauzustand einen Überstand über die zylinderabgewandte Fläche A210 der Tasse 210 aufweist.The fuel nozzle 302 is designed as a bolt which, viewed in the axial direction X M , has a projection in the assembled state over the surface A210 of the cup 210 facing away from the cylinder.

Der Bolzen 302 weist zumindest im Bereich des Überstandes ein Aussengewinde 302A auf.The bolt 302 has an external thread 302A at least in the region of the protrusion.

Das Brennstoffeinspritzventil 300 ist im Zusammenbauzustand in der Tasse 210 ortsfest und insbesondere verdrehsicher positioniert, sodass die zylinderabgewandte Fläche A210 der Tasse 210 erfindungsgemäß als eine vorgebbare Anbaufläche dienen kann, die im dreidimensionalen Raum vorgebbar ausgerichtet ist.In the assembled state, the fuel injection valve 300 is positioned in the cup 210 in a stationary and, in particular, non-rotatable manner, so that, according to the invention, the surface A210 of the cup 210 facing away from the cylinder can serve as a predeterminable mounting surface which can be predetermined in three-dimensional space.

Ein Brennstoffeinspritzventil 300 stellt nach seiner Montage, die noch erläutert wird, im Zusammenbauzustand ein Zusammenbauteil dar, welches das Brennstoffeinspritzventil 300 mit Brennstoffstutzen 302 an sich und das Fixierungselement 330 umfasst.After assembly, which will be explained later, a fuel injector 300 in the assembled state represents an assembly part which comprises the fuel injector 300 with fuel connector 302 per se and the fixing element 330.

Das Fixierungselement 330 ist im Zusammenbauzustand mit dem Brennstoffeinspritzventil 300 (Injektor) verbunden, der aus dem Injektorrumpf 340 und einer Injektorspitze 350 ausgebildet ist, die zumeist zylindrisch ausgeführt sind, wie in der Figur verdeutlicht ist.In the assembled state, the fixing element 330 is connected to the fuel injection valve 300 (injector), which is formed from the injector body 340 and an injector tip 350, which are mostly cylindrical, as is shown in the figure.

An der Injektorspitze 350 ist eine umlaufende Dichtung 350A angeordnet, die zur kraftstoffseitigen Abdichtung des Einbaukanals 110, insbesondere eine kraftstoffseitige Abdichtung der Injektorspitze 350 gegenüber dem Einbaukanal 110 des Zylinderkopfes 100 und damit letztlich gegenüber dem Brennraum 115 im Zylinderblock gewährleistet.A circumferential seal 350A is arranged on the injector tip 350, which ensures the fuel-side sealing of the installation channel 110, in particular a fuel-side seal of the injector tip 350 with respect to the installation channel 110 of the cylinder head 100 and thus ultimately with respect to the combustion chamber 115 in the cylinder block.

Fixierungselement 330, Injektorrumpf 340 und Injektorspitze 350 liegen auf einer Achse X, die als Längsmittelachse XM des Brennstoffeinspritzventils 300 ausgebildet ist.Fixing element 330, injector fuselage 340 and injector tip 350 lie on an axis X, which is designed as the longitudinal central axis X M of the fuel injection valve 300.

Das Brennstoffeinspritzventil 300 umfasst ein Übergangselement 320, welches von dem Injektorrumpf abgeht, wobei das Übergangselement 320 in ein nicht im Detail dargestelltes Steckdosenelement 360 übergeht, über das die elektrische Stromversorgung des Brennstoffeinspritzventils 300 zur Ansteuerung der Einspritzung erfolgt, welches ebenfalls geringfügig aus dem Zylinderkopf 100 der Brennkraftmaschine heraussteht.The fuel injection valve 300 comprises a transition element 320, which branches off from the injector fuselage, the transition element 320 merging into a socket element 360 (not shown in detail), via which the electrical power supply to the fuel injection valve 300 for controlling the injection takes place, which likewise comes out slightly from the cylinder head 100 Internal combustion engine protrudes.

Das Fixierungselement 330 weist eine Sacklochbohrung 330A auf, die im Zusammenbauzustand der zylinderabgewandten Fläche A210 der Tasse 210 zugewandt ist.The fixing element 330 has a blind hole 330A which, in the assembled state, faces the surface 210 of the cup 210 facing away from the cylinder.

Die Sacklochbohrung 330A ist mit einem Innengewinde 330A-1 versehen, welches mit dem Außengewinde 302A des als Gewindebolzen ausgebildeten Brennstoffstutzens 302 korrespondiert.The blind hole 330A is provided with an internal thread 330A-1, which corresponds to the external thread 302A of the fuel connector 302 designed as a threaded bolt.

Um die Sacklochbohrung 330A herum ist eine im Zusammenbauzustand zylinderzugewandte Fläche A330 ausgebildet.A surface A330 facing the cylinder in the assembled state is formed around the blind bore 330A.

Die zylinderabgewandte Fläche A210 (nachfolgend auch als tassenseitige Kontaktfläche bezeichnet) der Tasse 210 und die zylinderzugewandte Fläche A330 (nachfolgend auch als fixierungselementseitige Kontaktfläche bezeichnet) des Fixierungselementes 330 bilden Kontaktflächen A210, A330 aus, mittels denen eine axiale Fixierung und radiale Ausrichtung des Brennstoffeinspritzventils 300 in dem Zylinderkopf 100 an der Tasse 210 der Kraftstoffverteilerleiste 200 bewirkt wird.The cylinder-facing surface A210 (hereinafter also referred to as the cup-side contact surface) of the cup 210 and the cylinder-facing surface A330 (hereinafter also referred to as the fixing element-side contact surface) of the fixing element 330 form contact surfaces A210, A330, by means of which axial fixing and radial alignment of the fuel injection valve 300 in the cylinder head 100 on the cup 210 of the fuel rail 200 is effected.

Das Fixierungselement 330 weist einen Innenmehrkant 330B auf, welches mittels einem in den Innenmehrkant 330B greifenden Werkzeug eine Schraubbewegung des Fixierungselementes 330 gegenüber dem zuvor in der Tasse 210 verdrehsicher vorpositionierten Brennstoffeinspritzventil 300 erlaubt.The fixing element 330 has an internal polygon 330B which, by means of a tool which engages in the internal polygon 330B, permits a screwing movement of the fixing element 330 with respect to the fuel injection valve 300 which has been pre-positioned in the cup 210 in a rotationally secure manner.

Das Brennstoffeinspritzventil 300 weist gegenüber der Durchgangsöffnung in der Tasse 210 und dem Einbaukanal 110 im Zylinderkopf ein geringes Spiel auf, sodass es ausgehend von der verdrehsicheren Vorpositionierung nach Durchführung der Schraubbewegung des Fixierungselementes 330 gegenüber der Tasse 210 zu einer axialen Endausrichtung und zu einer axialen Endpositionierung des Brennstoffeinspritzventils 300 gegenüber der Tasse 210 und gegenüber dem Einbaukanal 110 im Zylinderkopf 100 kommt.The fuel injection valve 300 has a slight play in relation to the through opening in the cup 210 and the installation channel 110 in the cylinder head, so that starting from the rotationally secure pre-positioning after the screwing movement of the fixing element 330 has been carried out relative to the cup 210, it has an axial end alignment and an axial end positioning of the Fuel injection valve 300 comes opposite the cup 210 and opposite the installation channel 110 in the cylinder head 100.

Ferner kommt es ausgehend von der verdrehsicheren Vorpositionierung des Brennstoffeinspritzventils 300 in der Tasse 210 nach Durchführung der Schraubbewegung des Fixierungselementes 330 gegenüber der Tasse 210 zu einer radialen Endausrichtung und zu einer radialen Endpositionierung über die tassenseitige und die fixierungselementseitige Kontaktfläche A210, A330.Furthermore, starting from the rotationally secure pre-positioning of the fuel injection valve 300 in the cup 210 after the screwing movement of the fixing element 330 relative to the cup 210 has been carried out, there is a radial end alignment and a radial end positioning via the cup-side and the fixing element-side contact surfaces A210, A330.

Mit anderen Worten, es erfolgt durch Verschrauben des Fixierungselementes 330 eine zweidimensionale Endausrichtung und Endpositionierung des Brennstoffeinspritzventils 300 im Zylinderkopf 100 unter Zuhilfenahme der positionierten und entsprechend ausgerichteten Tasse 210 am Zylinderkopf 100, die zwischen Zylinderkopf 100 und Fixierungselement 330 angeordnet ist.In other words, screwing the fixing element 330 results in a two-dimensional final alignment and final positioning of the fuel injection valve 300 in the cylinder head 100 with the aid of the positioned and appropriately aligned cup 210 on the cylinder head 100, which is arranged between the cylinder head 100 and the fixing element 330.

Es erfolgt eine axiale Endausrichtung und axiale Endpositionierung des Brennstoffeinspritzventils 300 axial in Längserstreckung XM und eine radiale Endausrichtung und eine radiale Endpositionierung der Längsachse des Brennstoffeinspritzventils 300 innerhalb des Einbaukanals im Zylinderkopf und innerhalb der Durchgangsöffnungen in den Tassenabschnitten 210A und 210B der Tasse 210, indem die Längsachse in radialer Richtung ausgerichtet wird.There is an axial end alignment and axial end positioning of the fuel injection valve 300 axially in the longitudinal extent X M and a radial end alignment and a radial end positioning of the longitudinal axis of the fuel injection valve 300 within the installation channel in the cylinder head and within the through openings in the Cup sections 210A and 210B of cup 210 by aligning the longitudinal axis in the radial direction.

Anschließend wird zur weiteren Erläuterung ein zugehöriges Abdichtungs- und Montagekonzept des Brennstoffeinspritzventils 300 erläutert.An associated sealing and assembly concept of the fuel injector 300 is then explained for further explanation.

Die Montage erfolgte derart, dass das Brennstoffeinspritzventil 300 vor der Montage der Kraftstoffverteilerleiste 200 in den Einbaukanal 115 eingeführt wird. Dabei steht der Brennstoffstutzen 302 aus dem Zylinderkopf 100 heraus.The assembly was carried out in such a way that the fuel injection valve 300 is inserted into the installation duct 115 before the assembly of the fuel rail 200. The fuel nozzle 302 protrudes from the cylinder head 100.

Dabei werden die Brennstoffeinspritzventile 300 über die Injektorspitze 350 in dem Einbaukanal 110 beim Einschieben der Brennstoffeinspritzventile 300 derart selbstständig vorpositioniert, dass die Injektorspitze 350 nur mit der Dichtung 350A mit dem Einbaukanal 110 in Berührung kommt, während der Injektorrumpf 340 keinerlei Kontaktpunkte zu dem Einbaukanal 110 aufweist. Die Ringdichtung stellt eine erste Dichtungsanordnung DA1 zwischen Brennraum 115 und dem Einbaukanal 115 des Zylinderkopfes 100 dar.The fuel injection valves 300 are independently pre-positioned via the injector tip 350 in the installation channel 110 when the fuel injection valves 300 are inserted in such a way that the injector tip 350 only comes into contact with the installation channel 110 with the seal 350A, while the injector body 340 has no contact points with the installation channel 110 , The ring seal represents a first seal arrangement DA1 between the combustion chamber 115 and the installation duct 115 of the cylinder head 100.

Der Körperschall des Injektors 300 wird somit nur noch geringfügig von der Injektorspitze 350 über die Körperschall dämpfende Dichtung 350 auf den Zylinderkopf 100 übertragen.The structure-borne noise of the injector 300 is thus only slightly transmitted from the injector tip 350 to the cylinder head 100 via the structure-borne noise-damping seal 350.

In vorteilhafter Weise wird ferner zwischen dem Injektorrumpf 340 und dem Einbaukanal 110 ein entsprechender Abstand gebildet, der eine direkte Übertragung, insbesondere eine direkte Übertragung von Schallwellen von dem Injektorrumpf 340 auf den Zylinderkopf 100 verhindert.Advantageously, a corresponding distance is also formed between the injector body 340 and the installation channel 110, which prevents direct transmission, in particular direct transmission of sound waves from the injector body 340 to the cylinder head 100.

Dabei ist die Verbindung innerhalb der ersten Dichtungsanordnung DA1 noch derart flexibel, dass der Abstand innerhalb bestimmter Toleranzen zwischen Längsachse des Einbaukanals 110 im Zylinderkopf 100 und die Längsmittelachse XM des Brennstoffeinspritzventils 300 durch die Fixierung mittels dem Fixierungselement 330 relativ zueinander in Übereinstimmung gebracht werden kann.The connection within the first sealing arrangement DA1 is still so flexible that the distance within certain tolerances between the longitudinal axis of the installation channel 110 in the cylinder head 100 and the longitudinal central axis X M of the fuel injector 300 can be brought into agreement relative to one another by the fixing by means of the fixing element 330.

Anschließend wird die Durchgangsöffnung der Tasse 210 der Kraftstoffverteilerleiste 200 derart auf den Brennstoffstutzen 302 geschoben, dass nur noch der Überstand des Brennstoffstutzens 302 auf der zylinderabgewandten Seite der Tasse 201 herausragt.Then the through opening of the cup 210 of the fuel rail 200 is pushed onto the fuel nozzle 302 such that only the protrusion of the fuel nozzle 302 protrudes on the side of the cup 201 facing away from the cylinder.

Die Durchgangsöffnung, die in Abschnitten beziehungsweise Tassenabschnitten 210A und 210B der Tasse 210 ausgebildet ist, weist gegenüber der Mantelfläche des Brennstoffstutzens 302 ebenfalls nur geringes Spiel auf, sodass es zu der bereits beschriebenen Vorausrichtung beziehungsweise Vorpositionierung des Brennstoffeinspritzventils 300 kommt, wobei die Tasse 210 der Kraftstoffverteilerleiste 200 an einer dafür vorgesehenen Position innerhalb des Zylinderkopfes befestigt wird, wie nicht näher dargestellt ist.The through opening, which is formed in sections or cup sections 210A and 210B of the cup 210, faces the outer surface of the fuel nozzle 302 also only has a slight backlash, so that the previously described pre-positioning or pre-positioning of the fuel injection valve 300 occurs, the cup 210 of the fuel rail 200 being fastened to a position provided for this purpose within the cylinder head, as is not shown in more detail.

Gleichzeitig mit dem Aufsetzen der Tasse 210 auf dem Brennstoffstutzen 302 erfolgt die Verdrehsicherung des vorpositionierten Brennstoffeinspritzventils 300 an der Tasse 210.Simultaneously with the placement of the cup 210 on the fuel nozzle 302, the pre-positioned fuel injector 300 is secured against rotation on the cup 210.

Anschließend erfolgt die Fixierung des Brennstoffeinspritzventils 300 über das Fixierungselement 330.The fuel injector 300 is then fixed via the fixing element 330.

Das Fixierungselement 330 wird mit seinem Innengewinde 330A-1 auf das Außengewinde 302A des Brennstoffstutzens aufgeschraubt, sodass die Kontaktflächen A210, A330 in Kontakt kommen, wobei durch die Schraubwirkung ein axiales Einzugsmoment bewirkt wird, wodurch das Brennstoffeinspritzventil 300 axial in seine Endposition gebracht wird.The fixing element 330 is screwed with its internal thread 330A-1 onto the external thread 302A of the fuel nozzle, so that the contact surfaces A210, A330 come into contact, whereby the screwing action causes an axial pull-in torque, which brings the fuel injection valve 300 axially into its end position.

Über die Kontaktflächen A210, A330 erfolgt die radiale Ausrichtung der Längsmittelachse XM des Brennstoffeinspritzventils 300 gegenüber der Längsachse des Einbaukanals 110, sodass das Brennstoffeinspritzventils 300 auch radial in seine Endposition gebracht.The radial alignment of the longitudinal center axis X M of the fuel injection valve 300 with respect to the longitudinal axis of the installation channel 110 takes place via the contact surfaces A210, A330, so that the fuel injection valve 300 is also brought radially into its end position.

Mit anderen Worten, die Längsmittelachse XM des Brennstoffeinspritzventils 300 kann nach der Vorpositionierung gegenüber der Längsachse des Einbaukanals 110 um einen geringen Winkelbetrag verschoben werden, wodurch stets ein gerader Sitz des Brennstoffeinspritzventils 300 in dem Einbaukanal 110 gewährleistet ist, wodurch Kontaktstellen zwischen dem Injektorrumpf 340 und dem Einbaukanal 110 des Zylinderkopfes 100 sicher vermieden werden.In other words, the longitudinal center axis X M of the fuel injector 300 can be displaced by a small angular amount after the prepositioning relative to the longitudinal axis of the installation channel 110, whereby a straight fit of the fuel injection valve 300 is always ensured in the installation channel 110, as a result of which contact points between the injector body 340 and the installation channel 110 of the cylinder head 100 can be safely avoided.

Zusammengefasst erfolgt erfindungsgemäß eine sehr einfache und sichere, nahezu spielfreie Befestigung des Brennstoffeinspritzventils 300 an der Kraftstoffverteilerleiste 200, die zugleich verdrehsicher ist, und die im Rahmen der zur Verfügung stehenden beziehungsweise der bewusst zur Verfügung gestellten Toleranzen während der Vorpositionierung in der Lage ist, in dem Zusammenbauzustand die vorhandenen Toleranzen der miteinander in Verbindung stehenden Bauteile auszugleichen, wobei die Verbindung insgesamt nur einen geringen Bauraum benötigt.In summary, according to the invention, the fuel injector 300 is fastened to the fuel rail 200 in a very simple and secure manner, with almost no play, which is at the same time non-rotatable and which is able to do so within the scope of the available or deliberately provided tolerances during the pre-positioning Assembled state to compensate for the existing tolerances of the components connected to each other, the overall connection requiring only a small space.

Die geringen Bauraum benötigende Verbindung ist vor allem bei einer seitlichen Injektorlage von besonderem Vorteil, wie bereits erläutert worden ist. Die Verbindung stellt ebenfalls sicher, dass an dem Brennstoffeinspritzventil 300 hohe Drücke von über 400 bar anliegen können, da das Anzugselement des Fixierungselementes 330 nicht nur die die Kräfte für die Endausrichtung, sondern auch die Kräfte zur Abdichtung einer zweiten Dichtungsanordnung DA2 und einer dritten Dichtungsanordnung DA3 zur Verfügung stellt.The connection, which requires little installation space, is particularly advantageous, particularly in the case of a lateral injector position, as has already been explained. The connection also ensures that high pressures of over 400 bar can be present at the fuel injection valve 300, since the tightening element of the fixing element 330 provides not only the forces for the final alignment, but also the forces for sealing a second sealing arrangement DA2 and a third sealing arrangement DA3.

Die zweite Dichtungsanordnung DA2 sorgt für eine Abdichtung zwischen der Durchgangsöffnung in der Tasse und dem Einbaukanal 115.The second sealing arrangement DA2 provides a seal between the through opening in the cup and the installation channel 115.

Die dritte Dichtungsanordnung DA3 sorgt für eine Abdichtung zwischen den Kontaktflächen A210, A330 der Tasse 210 und dem Fixierungselement 330.The third sealing arrangement DA3 provides a seal between the contact surfaces A210, A330 of the cup 210 and the fixing element 330.

Vorgeschlagen werden folgende Dichtungssysteme, die für beide Dichtungsanordnungen DA2, DA3 einsetzbar sind oder es werden zwei der nachfolgend genannten Dichtungssysteme in Kombination für die eine oder andere Dichtungsanordnung in Kombination eingesetzt.The following sealing systems are proposed which can be used for both sealing arrangements DA2, DA3 or two of the sealing systems mentioned below are used in combination for one or the other sealing arrangement in combination.

Folgende Dichtungssysteme können zum Einsatz kommen, ein Kegel-Konus-Dichtsitz, ein Halbkugel-Konus-Dichtsitz, eine Metallsickendichtung, eine Beißkante, Verkleben, ein O-Ring, ein Hanfband oder ein Nichteisenmetalldichtring.The following sealing systems can be used: a cone-cone sealing seat, a hemisphere-cone sealing seat, a metal bead seal, a bite edge, adhesive bonding, an O-ring, a hemp tape or a non-ferrous metal sealing ring.

Zur Verdeutlichung der erfindungsgemäßen Dichtungsanordnungen ist in Figur 1 ein Ausführungsbeispiel dargestellt, bei dem die zweite Dichtungsanordnung DA2 als Kegel-Konus-Dichtsitz und die dritte Dichtungsanordnung DA3 als Metallsickendichtung ausgebildet ist.To illustrate the sealing arrangements according to the invention is in Figure 1 an embodiment shown, in which the second sealing arrangement DA2 is designed as a cone-cone sealing seat and the third sealing arrangement DA3 as a metal bead seal.

Bei der zweiten Dichtungsanordnung DA2 ist der zweite Tassenabschnitt 210B der Durchgangsöffnung der Tasse 210 kegelförmig ausgebildet, sodass ein zwischen einem Zwischenstutzen 303 und dem Brennstoffstutzen 302 ausgebildeter Kegel am Brennstoffeinspritzventils 300 im Zusammenbauzustand in die kegelförmige Durchgangsöffnung des zweiten Tassenabschnittes 210B eingreift, wodurch der entsprechende Dichtsitz gebildet ist. Der zweite Tassenabschnitt 210B geht in den ersten Tassenabschnitt 210A über, der zylindrisch ausgebildet ist und endseitig den Brennstoffstutzen 302 bildet. Es versteht sich, dass der Zwischenstutzen 303 zwischen Injektorrumpf 340 und Kegel nicht zwingend angeordnet sein muss.In the second sealing arrangement DA2, the second cup section 210B of the through opening of the cup 210 is conical, so that a cone formed on the fuel injection valve 300 between an intermediate connection 303 and the fuel connection 302 engages in the conical through opening of the second cup section 210B in the assembled state, thereby forming the corresponding sealing seat is. The second cup section 210B merges into the first cup section 210A, which is cylindrical and forms the fuel nozzle 302 at the end. It goes without saying that the intermediate connector 303 does not necessarily have to be arranged between the injector body 340 and the cone.

Die dritte Dichtungsanordnung DA3 erfolgt im Ausführungsbeispiel über die Metallsickendichtung, wobei in den sich gegenüberliegenden Kontaktflächen A210, A330 sich gegenüberliegende in der Tasse 210 und in dem Fixierungselement 330 umlaufende Sicken S210 und S330 ausgebildet sind. In mindestens einer der Sicken S210 und S330 wird ein Dichtungselement, insbesondere eine Kupferdichtung eingelegt, die nach entsprechender Anbringung des Fixierungselements 330 und Verspannung des Brennstoffeinspritzventils 300, wie bereits oben erläutert, für eine Dichtheit zwischen Tasse 210 und Fixierungselement 300 sorgt.In the exemplary embodiment, the third sealing arrangement DA3 takes place via the metal bead seal, with opposing beads in the cup 210 and in the fixing element 330 surrounding the contact surfaces A210, A330 S210 and S330 are formed. In at least one of the beads S210 and S330, a sealing element, in particular a copper seal, is inserted, which, after appropriate attachment of the fixing element 330 and tensioning of the fuel injection valve 300, as already explained above, ensures a tightness between cup 210 and fixing element 300.

Die Erfindung schafft somit eine Möglichkeit der einfach ausgeführten axialen Fixierung und radiale Ausrichtung des Brennstoffeinspritzventils 300 in Kombination mit der Abdichtung des Brennstoffeinspritzventils 300 gegenüber der Kraftstoffverteilerleiste 300 sowie eine geräuscharme Anordnung des Brennstoffeinspritzventils 300 in dem Einbaukanal 110.The invention thus creates a possibility of simple axial fixation and radial alignment of the fuel injection valve 300 in combination with the sealing of the fuel injection valve 300 with respect to the fuel rail 300 and a low-noise arrangement of the fuel injection valve 300 in the installation channel 110.

Zusammengefasst beruht die Montage auf folgenden Schritten: a) Einführen des Brennstoffeinspritzventils 300 in den Zylinderkopf 100 in die dafür im Zylinderkopf 100 vorgesehene Öffnung und b) Aufsetzen der Kraftstoffverteilerleiste 200 über die Durchgangsöffnung in der Kraftstoffverteilerleiste 200 auf die als Brennstoffstutzen 302 bezeichnete bolzenartige Verlängerung des Brennstoffeinspritzventils 300 und c) Fixierung der Kraftstoffverteilerleiste 200 an den Zylinderkopf 100, der als Anbauelement für die Kraftstoffverteilerleiste 200 dient und schließlich d) Fixierung des Brennstoffeinspritzventils 300 mittels dem Fixierungselement 330 in der Art eines Schraubkopfes an der Kraftstoffverteilerleiste 200.In summary, the assembly is based on the following steps: a) inserting the fuel injection valve 300 into the cylinder head 100 into the opening provided for this purpose in the cylinder head 100 and b) placing the fuel rail 200 via the passage opening in the fuel rail 200 onto the bolt-like extension of the fuel injector designated as fuel nozzle 302 300 and c) fixing the fuel rail 200 to the cylinder head 100, which serves as a mounting element for the fuel rail 200, and finally d) fixing the fuel injector 300 by means of the fixing element 330 in the manner of a screw head to the fuel rail 200.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

100100
Zylinderkopfcylinder head
110110
Einbaukanalinstallation channel
110A110A
Stufestep
115115
Brennraumcombustion chamber
200200
KraftstoffverteilerFuel distributor
201201
Öffnungopening
210210
Aufnahmeelement, TasseReceiving element, cup
210A210A
erster Tassenabschnitt mit zylindrischer Öffnungfirst cup section with cylindrical opening
210B210B
zweiter Tassenabschnitt mit kegelförmiger oder kugelförmiger Öffnungsecond cup section with a conical or spherical opening
A210A210
zylinderabgewandte Fläche (tassenseitige Kontaktfläche)surface facing away from the cylinder (contact surface on the cup side)
S210S210
Sicke (tassenseitig)Bead (cup side)
300300
BrennstoffeinspritzventilFuel injector
301301
Öffnungopening
302302
Brennstoffstutzenfuel nozzle
302A302A
Außengewindeexternal thread
303303
ZwischenstutzenGland body
320320
ÜbergangselementTransition element
330330
Fixierungselementfixing element
330A330A
SacklochbohrungBlind hole
330A-1330A-1
Innengewindeinner thread
A330A330
zylinderzugewandte Fläche (fixierungselementseitige Kontaktfläche)surface facing the cylinder (contact surface on the fixing element side)
S330S330
Sicke (fixierungselementseitig)Bead (on the fixing element side)
340340
InjektorrumpfInjektorrumpf
340A340A
Stufestep
350350
Injektorspitzeinjector
350A350A
Dichtungpoetry
DA1DA1
erste Dichtungsanordnungfirst sealing arrangement
DA2DA2
zweite Dichtungsanordnungsecond sealing arrangement
DA3DA3
dritte Dichtungsanordnungthird sealing arrangement
XM X M
Längsmittelachse des Brennstoffeinspritzventils 300 und der Tasse 210 sowie des Fixierungselementes 330Longitudinal central axis of the fuel injection valve 300 and the cup 210 and the fixing element 330

Claims (13)

Anordnung zur Verbindung mindestens eines Brennstoffeinspritzventils (300) mit einem Kraftstoffverteiler (200) einer Kraftstoffeinspritzanlage einer Brennkraftmaschine, der an einem Zylinderkopf (100) lösbar befestigt ist, wobei das mindestens eine Brennstoffeinspritzventil (300) mittels einem Fixierungselement (330) an einem Aufnahmeelement (210) des Kraftstoffverteilers (200) lösbar befestigt ist,
dadurch gekennzeichnet, dass
eine zylinderabgewandte Fläche (A210) des Aufnahmeelementes (210) des Kraftstoffverteilers (200) und eine zylinderzugewandte Fläche (A330) des Fixierungselementes (330) im Zusammenbauzustand von Zylinderkopf (100) und Kraftstoffverteiler (200) sowie dem Brennstoffeinspritzventil (300) als Kontaktflächen (A210, A330) ausgebildet sind, mittels denen durch Anbringung des Fixierungselementes (330) an dem Brennstoffeinspritzventil (300) eine axiale Fixierung und eine radiale Ausrichtung des Brennstoffeinspritzventils (300) in dem Zylinderkopf (100) respektive in dem Aufnahmeelement (210) des Kraftstoffverteilers (200) bewirkbar ist.Arrangement for connecting at least one fuel injection valve (300) to a fuel distributor (200) of a fuel injection system of an internal combustion engine, which is detachably fastened to a cylinder head (100), the at least one fuel injection valve (300) using a fixing element (330) on a receiving element (210 ) the fuel distributor (200) is releasably attached,
characterized in that
a cylinder-facing surface (A210) of the receiving element (210) of the fuel distributor (200) and a cylinder-facing surface (A330) of the fixing element (330) in the assembled state of the cylinder head (100) and fuel distributor (200) and the fuel injection valve (300) as contact surfaces (A210 , A330), by means of which, by attaching the fixing element (330) to the fuel injection valve (300), an axial fixing and a radial alignment of the fuel injection valve (300) in the cylinder head (100) or in the receiving element (210) of the fuel distributor (200 ) is feasible. Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass das Fixierungselement (330) ein Schraubkopf ist, der eine Sacklochbohrung (330A) aufweist, die mit einem Innengewinde (330A-1) versehen ist, die im Zusammenbauzustand der zylinderabgewandten Fläche (A210) des Aufnahmeelementes (210) zugewandt ist, wobei die zylinderzugewandte Fläche (A330) um die Sacklochbohrung (330A) des Fixierungselementes (330) herum ausgebildet.Arrangement according to claim 1, characterized in that the fixing element (330) is a screw head which has a blind hole (330A) which is provided with an internal thread (330A-1) which, in the assembled state of the surface (A210) facing away from the receiving element (A210) 210) faces, the cylinder-facing surface (A330) being formed around the blind hole (330A) of the fixing element (330). Anordnung nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, dass das Innengewinde (330A-1) der Sacklochbohrung (330A) mit einem Außengewinde (302A) eines als Gewindebolzen ausgebildeten Brennstoffstutzens (302) des Brennstoffeinspritzventils (300) korrespondiert.Arrangement according to claims 1 and 2, characterized in that the internal thread (330A-1) of the blind hole (330A) corresponds to an external thread (302A) of a fuel nozzle (302) of the fuel injection valve (300) which is designed as a threaded bolt. Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass eine Durchgangsöffnung des Aufnahmeelementes (210) und die zylinderabgewandten Fläche (A210) des Aufnahmeelementes (210) im Zusammenbauzustand durch Befestigung des Aufnahmeelementes (210) an dem Zylinderkopf (100) vorgebbar ausgerichtet sind, sodass eine Anordnung des Brennstoffeinspritzventils (300) in einem Einbaukanal (110) des Zylinderkopfes (100) und der Durchgangsöffnung des Aufnahmeelementes (210) in einer Vorposition möglich ist, wobei die Vorpositionierung des Aufnahmeelementes gleichzeitig zu einer Vorpositionierung der zylinderabgewandten Fläche (A210) des Aufnahmeelementes (210) führt.Arrangement according to claim 1, characterized in that a through opening of the receiving element (210) and the cylinder-facing surface (A210) of the receiving element (210) are pre-aligned in the assembled state by fastening the receiving element (210) to the cylinder head (100), so that an arrangement of the fuel injection valve (300) in an installation channel (110) of the cylinder head (100) and the through opening of the receiving element (210) is possible in a pre-position, the pre-positioning of the receiving element simultaneously with a pre-positioning of the cylinder-facing surface (A210) of the receiving element (210) leads. Anordnung nach den Ansprüchen 1, 3 und 4, dadurch gekennzeichnet, dass das Brennstoffeinspritzventil (300) in der Vorposition gegenüber dem Einbaukanal (115) und der Durchgangsöffnung gegenüber dem Aufnahmeelement (210) des Kraftstoffverteilers (200) mit geringem Spiel und gleichzeitig verdrehsicher angeordnet ist und der Brennstoffstutzen (302) des Brennstoffeinspritzventils (300) einen Überstand über die zylinderabgewandte Fläche (A210) aufweist.Arrangement according to claims 1, 3 and 4, characterized in that the fuel injection valve (300) is arranged in the preposition with respect to the installation duct (115) and the through opening with respect to the receiving element (210) of the fuel distributor (200) with little play and at the same time being secured against rotation and the fuel nozzle (302) of the fuel injection valve (300) has a protrusion over the surface (A210) facing away from the cylinder. Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass das Fixierungselement (330) einen Innenmehrkant (330B) aufweist, in den zur Ausübung einer das Brennstoffeinspritzventil (300) an dem Aufnahmeelement (210) fixierenden Drehbewegung des Fixierungselementes (330) ein Werkzeug eingreift.Arrangement according to Claim 1, characterized in that the fixing element (330) has an internal polygon (330B) into which a tool engages to carry out a rotary movement of the fixing element (330) which fixes the fuel injection valve (300) on the receiving element (210). Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass die Kontaktflächen (A210, A330) ebene Flächen sind, mittels denen eine axiale Fixierung und radiale Ausrichtung des Brennstoffeinspritzventils (300) in dem Zylinderkopf (100) und an dem Aufnahmeelement 210) der Kraftstoffverteilerleiste 200 bewirkt wird, indem die zylinderzugewandte Fläche (A330) des Fixierungselementes (330) gegenüber der vorpositionierten zylinderabgewandten Fläche (A210) des Aufnahmeelementes (210) zur Anlage gebracht und durch die Ausübung einer Drehbewegung des Fixierungselementes (330) axial verspannbar ist, wobei gleichzeitig eine radiale Ausrichtung des Brennstoffeinspritzventils (200) erfolgt, da die Kontaktflächen (A210, A330) durch die axiale Verspannung eine Endpositionierung des Brennstoffeinspritzventils (300) bewirken.Arrangement according to claim 1, characterized in that the contact surfaces (A210, A330) are flat surfaces by means of which an axial fixation and radial alignment of the fuel injection valve (300) in the cylinder head (100) and on the receiving element 210) of the fuel rail 200 is effected , by bringing the cylinder-facing surface (A330) of the fixing element (330) into contact with the prepositioned cylinder-facing surface (A210) of the receiving element (210) and axially bracing by exerting a rotational movement of the fixing element (330), with a radial alignment of the Fuel injection valve (200) takes place because the contact surfaces (A210, A330) bring about an end positioning of the fuel injection valve (300) due to the axial bracing. Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass eine erste Dichtungsanordnung (DA1) zwischen Brennraum (115) und dem Einbaukanal (115) des Zylinderkopfes (100) angeordnet ist, die als Ringdichtung ausgebildet ist, die eine Spitze (350) des Brennstoffeinspritzventils (300) gegenüber dem Einbaukanal (115) abdichtet.Arrangement according to claim 1, characterized in that a first sealing arrangement (DA1) between the combustion chamber (115) and the installation channel (115) of the cylinder head (100) is arranged, which is designed as an annular seal which has a tip (350) of the fuel injection valve (300 ) seals against the installation duct (115). Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass eine zweite Dichtungsanordnung (DA2) zwischen der Durchgangsöffnung des Aufnahmeelementes (210) des Kraftstoffverteilers (200) und dem Einbaukanal (115) des Brennstoffeinspritzventils (300) angeordnet ist.Arrangement according to claim 1, characterized in that a second sealing arrangement (DA2) between the through opening of the receiving element (210) of the fuel distributor (200) and the installation channel (115) of the fuel injector (300) is arranged. Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass eine dritte Dichtungsanordnung (DA3) zwischen den Kontaktflächen (A210, A330) des Aufnahmeelementes (210) des Kraftstoffverteilers (200) und des Fixierungselementes (330) angeordnet ist.Arrangement according to claim 1, characterized in that a third sealing arrangement (DA3) is arranged between the contact surfaces (A210, A330) of the receiving element (210) of the fuel rail (200) and the fixing element (330). Anordnung nach den Ansprüchen 9 und 10, dadurch gekennzeichnet, dass die Dichtungsanordnungen (DA2, DA3) als Kegel-Konus-Dichtsitz, als Halbkugel-Konus-Dichtsitz, als Metallsickendichtung, als Beißkante, als Klebverbindung als O-Ring, als Hanfbanddichtung oder als Nichteisenmetalldichtring ausgebildet sind, wobei die Dichtungsanordnungen (DA2, DA3) als identische Dichtungssysteme oder unterschiedliche Dichtungssysteme ausgebildet sind.Arrangement according to claims 9 and 10, characterized in that the sealing arrangements (DA2, DA3) as a cone-cone sealing seat, as a hemisphere-cone sealing seat, as a metal bead seal, as a bite edge, as an adhesive connection as an O-ring, as a hemp band seal or as Non-ferrous metal sealing rings are formed, the sealing arrangements (DA2, DA3) being designed as identical sealing systems or different sealing systems. Verfahren zur Herstellung einer Anordnung nach mindestens einem der Ansprüche 1 bis 11, gekennzeichnet durch die Montageschritte: a) Einführen eines Brennstoffeinspritzventils (300) in einen Zylinderkopf (100) in die dafür im Zylinderkopf (100) vorgesehene Öffnung (115), und b) Aufsetzen eines Kraftstoffverteilers (200) über eine Durchgangsöffnung in einem Aufnahmeelement (210) des Kraftstoffverteilers (200) auf eine als Brennstoffstutzen (302) ausgebildete bolzenartige Verlängerung des Brennstoffeinspritzventils (300), und c) Fixierung des Kraftstoffverteilers (200) an dem Zylinderkopf (100), der als Anbauelement für den Kraftstoffverteiler (200) dient, und d) Fixierung des Brennstoffeinspritzventils (300) mittels einem Fixierungselement (330) an dem Kraftstoffverteiler (200). Method for producing an arrangement according to at least one of claims 1 to 11, characterized by the assembly steps: a) inserting a fuel injection valve (300) into a cylinder head (100) into the opening (115) provided therefor in the cylinder head (100), and b) placing a fuel distributor (200) via a through opening in a receiving element (210) of the fuel distributor (200) on a bolt-like extension of the fuel injection valve (300) designed as a fuel nozzle (302), and c) fixing the fuel distributor (200) to the cylinder head (100), which serves as an attachment element for the fuel distributor (200), and d) fixing the fuel injection valve (300) to the fuel distributor (200) by means of a fixing element (330). Kraftstoffeinspritzanlage einer Brennkraftmaschine mit einer Anordnung zur Verbindung mindestens eines Brennstoffeinspritzventils (300) an einem Kraftstoffverteiler (200) der Kraftstoffeinspritzanlage, wobei das mindestens eine Brennstoffeinspritzventil (300) mittels einem Fixierungselement (330) an einem Aufnahmeelement (210) des Kraftstoffverteilers (200) lösbar befestigt ist, dadurch gekennzeichnet, dass eine zylinderabgewandte Fläche (A210) des Aufnahmeelementes (210) des Kraftstoffverteilers (200) und eine zylinderzugewandte Fläche (A330) des Fixierungselementes (330) im Zusammenbauzustand von Zylinderkopf (100) und Kraftstoffverteiler (200) sowie dem Brennstoffeinspritzventil (300) als Kontaktflächen (A210, A330) ausgebildet sind, mittels denen durch Anbringung des Fixierungselementes (330) an dem Brennstoffeinspritzventil (300) eine axiale Fixierung und eine radiale Ausrichtung des Brennstoffeinspritzventils (300) in dem Zylinderkopf (100) respektive in dem Aufnahmeelement (210) der Kraftstoffverteilerleiste (200) bewirkbar ist.Fuel injection system of an internal combustion engine with an arrangement for connecting at least one fuel injection valve (300) to a fuel distributor (200) of the fuel injection system, the at least one fuel injection valve (300) being detachably fastened to a receiving element (210) of the fuel distributor (200) by means of a fixing element (330) , characterized in that a cylinder-facing surface (A210) of the receiving element (210) of the fuel distributor (200) and a cylinder-facing surface (A330) of the fixing element (330) in the assembled state of the cylinder head (100) and fuel distributor (200) and the fuel injection valve ( 300) as contact surfaces (A210, A330) are designed, by means of which, by attaching the fixing element (330) to the fuel injection valve (300), an axial fixing and a radial alignment of the fuel injection valve (300) in the cylinder head (100) or in the receiving element (210) of the fuel rail (200) can be effected.
EP19188963.3A 2018-08-20 2019-07-30 Arrangement of a fuel injection valve on a fuel distributor of a combustion engine Active EP3613978B1 (en)

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US20200056573A1 (en) 2020-02-20
US10815948B2 (en) 2020-10-27
CN110848062B (en) 2021-11-02
CN110848062A (en) 2020-02-28
EP3613978B1 (en) 2022-05-18

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