EP3613978A1 - Agencement d'une soupape d'injecteur de carburant sur un distributeur de carburant d'un moteur à combustion interne - Google Patents

Agencement d'une soupape d'injecteur de carburant sur un distributeur de carburant d'un moteur à combustion interne 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)
English (en)
Other versions
EP3613978B1 (fr
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/fr
Application granted granted Critical
Publication of EP3613978B1 publication Critical patent/EP3613978B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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)
EP19188963.3A 2018-08-20 2019-07-30 Agencement d'une soupape d'injecteur de carburant sur un distributeur de carburant d'un moteur à combustion interne Active EP3613978B1 (fr)

Applications Claiming Priority (1)

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DE102018120239.3A DE102018120239A1 (de) 2018-08-20 2018-08-20 Anordnung eines Brennstoffeinspritzventils an einem Kraftstoffverteiler einer Brennkraftmaschine

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DE19853090A1 (de) * 1998-11-18 2000-05-25 Bosch Gmbh Robert Brennstoffeinspritzanlage
DE102008002122A1 (de) 2008-05-30 2009-12-03 Robert Bosch Gmbh Niederhalter für eine Brennstoffeinspritzvorrichtung
WO2013170998A1 (fr) 2012-05-14 2013-11-21 Robert Bosch Gmbh Ensemble comprenant un distributeur de carburant et plusieurs soupapes d'injection de carburant
EP2905461A2 (fr) * 2014-01-15 2015-08-12 Robert Bosch Gmbh Installation d'injection de carburant dotée d'un composant destiné à guider le carburant, d'une soupape d'injection de carburant et d'un support
WO2016020255A1 (fr) 2014-08-05 2016-02-11 Robert Bosch Gmbh Installation d'injection de carburant comprenant un ensemble servant à assembler une soupape d'injection de carburant à un composant acheminant du carburant
DE102016210573A1 (de) 2016-06-14 2017-12-14 Volkswagen Aktiengesellschaft Anordnung zur Verbindung mindestens eines Brennstoffeinspritzventils an einem Kraftstoffverteiler einer Kraftstoffeinspritzanlage und Kraftstoffeinspritzanlage einer Brennkraftmaschine

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JP5955198B2 (ja) * 2012-11-02 2016-07-20 株式会社ケーヒン 直噴式燃料噴射弁の支持構造
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Publication number Priority date Publication date Assignee Title
US5806494A (en) * 1997-08-06 1998-09-15 Caterpillar Inc. Hydraulically actuated fuel injection system with integrated actuation fluid rail and injectors
EP0945611A2 (fr) * 1998-03-23 1999-09-29 Yamaha Hatsudoki Kabushiki Kaisha Moteur à combustion interne du type à injection directe
DE19853090A1 (de) * 1998-11-18 2000-05-25 Bosch Gmbh Robert Brennstoffeinspritzanlage
DE102008002122A1 (de) 2008-05-30 2009-12-03 Robert Bosch Gmbh Niederhalter für eine Brennstoffeinspritzvorrichtung
WO2013170998A1 (fr) 2012-05-14 2013-11-21 Robert Bosch Gmbh Ensemble comprenant un distributeur de carburant et plusieurs soupapes d'injection de carburant
EP2905461A2 (fr) * 2014-01-15 2015-08-12 Robert Bosch Gmbh Installation d'injection de carburant dotée d'un composant destiné à guider le carburant, d'une soupape d'injection de carburant et d'un support
WO2016020255A1 (fr) 2014-08-05 2016-02-11 Robert Bosch Gmbh Installation d'injection de carburant comprenant un ensemble servant à assembler une soupape d'injection de carburant à un composant acheminant du carburant
DE102016210573A1 (de) 2016-06-14 2017-12-14 Volkswagen Aktiengesellschaft Anordnung zur Verbindung mindestens eines Brennstoffeinspritzventils an einem Kraftstoffverteiler einer Kraftstoffeinspritzanlage und Kraftstoffeinspritzanlage einer Brennkraftmaschine

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Publication number Publication date
US10815948B2 (en) 2020-10-27
DE102018120239A1 (de) 2020-02-20
CN110848062B (zh) 2021-11-02
CN110848062A (zh) 2020-02-28
US20200056573A1 (en) 2020-02-20
EP3613978B1 (fr) 2022-05-18

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