EP2116717B1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

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Publication number
EP2116717B1
EP2116717B1 EP09100169A EP09100169A EP2116717B1 EP 2116717 B1 EP2116717 B1 EP 2116717B1 EP 09100169 A EP09100169 A EP 09100169A EP 09100169 A EP09100169 A EP 09100169A EP 2116717 B1 EP2116717 B1 EP 2116717B1
Authority
EP
European Patent Office
Prior art keywords
control valve
valve seat
valve element
fuel injector
adjustment axis
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.)
Expired - Fee Related
Application number
EP09100169A
Other languages
German (de)
English (en)
Other versions
EP2116717A2 (fr
EP2116717A3 (fr
Inventor
Nadja Eisenmenger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2116717A2 publication Critical patent/EP2116717A2/fr
Publication of EP2116717A3 publication Critical patent/EP2116717A3/fr
Application granted granted Critical
Publication of EP2116717B1 publication Critical patent/EP2116717B1/fr
Expired - Fee Related 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • F02M63/0042—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing combined with valve seats of the lift valve type
    • 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
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0071—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059 characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements"
    • 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
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0077—Valve seat details
    • 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
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • F02M63/008—Hollow valve members, e.g. members internally guided
    • 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
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059

Definitions

  • the invention relates to a fuel injector, in particular a common rail injector, for injecting fuel into a combustion chamber of an internal combustion engine according to the preamble of claim 1.
  • the EP 1 612 403 A1 is a common rail injector with a pressure balanced in the axial direction control valve known.
  • the control valve which has a sleeve-shaped control valve element, the fuel pressure can be influenced within a control chamber bounded on the end side by an injection valve element.
  • the injection valve element is adjusted between an open position and a closed position, wherein the injection valve element releases the fuel flow into the combustion chamber of the internal combustion engine in its open position.
  • the sleeve-shaped control valve element is connected to an armature plate, which cooperates with an electromagnetic actuator for axial displacement of the control valve element.
  • a guide extension is provided, which is integrally formed with a bottom plate on which a cooperating with the control valve element control valve seat is arranged.
  • an injection valve with a control valve in which the control valve member cooperates with a transversely to the direction of movement movable member on which the control valve seat is formed.
  • the invention has for its object to propose a fuel injector with a sleeve-shaped control valve element, wherein the demands on the precision of the sealing surface and the control valve element seat are minimized while ensuring full functionality.
  • the invention is based on the idea of arranging the control valve seat element which is stationary in the prior art so as to be movable relative to the, in particular axial, adjustment axis of the control valve element.
  • the control valve seat element itself can be aligned relative to the sleeve-shaped control valve element, whereby depending on the degree of freedom of movement of the control valve seat element between existing control valve seat member and control valve element existing coaxial and / or angular errors can be compensated.
  • Due to the possibility for automatic alignment of the control valve seat element relative to the adjustment axis of the control valve seat element relative to the adjustment axis of the control valve element requirements on the precision of the sealing surface and the control valve seat can be minimized without functional losses would have to be accepted. Overall, this results in a cost-effectively producible, particularly robust fuel injector.
  • control valve seat element preferably in the axial direction
  • the component on which the control valve seat element, preferably in the axial direction, is supported itself is movable relative to the adjusting axis of the control valve element.
  • control valve seat element is arranged to be pivotable relative to the adjustment axis movable member and the component itself is slidably disposed to the adjustment axis of the control valve element.
  • an embodiment can be realized in which the control valve element is not completely pressure balanced, but only approximately in the axial direction pressure balanced.
  • a pressure stage acting in the closing direction of the control valve seat element is preferably realized.
  • the inner guide diameter of the control valve element is only slightly larger than the diameter of the sealing line.
  • control valve seat member is slidably disposed relative to the adjustment axis of the control valve element, preferably perpendicular to the adjustment axis of the control valve element.
  • control valve seat element is arranged pivotable and / or unrollable relative to the adjustment axis, preferably in the manner of a ball joint.
  • control valve seat member preferably in the axial direction
  • a component which is arranged fixed relative to the adjustment axis of the control valve member.
  • a relative to the adjustment axis displaceable arrangement of the control valve seat element can be realized in a particularly simple and effective manner.
  • the control valve seat element is held exclusively by the fuel pressure within the fuel injector on the component, ie, a hydraulic force is applied against the component.
  • control valve seat element has at least one part-spherical section, or is completely formed as a ball.
  • the part spherical portion may face the control valve seat and / or a part spherical portion may serve to support the control valve seat on a member either stationary relative to the adjustment axis of the control valve member or movable, preferably displaceable, is arranged to this adjustment axis.
  • control valve seat on the control valve seat element
  • the control valve seat member is either completely formed as a ball or at least a part-spherical, the control valve seat having forming portion.
  • an embodiment of the control valve seat element can be realized with an inner cone-shaped, in particular an inner cone-shaped, control valve seat, or with an outer cone-shaped, in particular an outer cone-shaped, control valve seat.
  • Such a conical control valve seat can also be combined with a control valve seat element which has a part-spherical section, in particular for supporting the control valve seat element on an adjacent component.
  • control valve seat as a flat seat on the control valve seat element, wherein also in such an embodiment, the control valve seat member, in particular for supporting the control valve seat member on a, in particular axial component, may have a part-spherical portion.
  • the optionally provided part-spherical section preferably serves to realize a pivotable arrangement of the control valve seat element relative to the adjustment axis.
  • control valve in which the control valve element is directed downwards, i. opens in the direction of the injection valve element seat.
  • the control valve element is directed downwards, i. opens in the direction of the injection valve element seat.
  • an embodiment with an upward-opening control valve element is also feasible, in the case of an otherwise conventional construction, a correspondingly long drainage channel must be provided through which fuel can flow from the control chamber to the control valve seat.
  • an embodiment is preferred in which the adjustment axis of the control valve element is aligned in the axial direction with the adjustment axis of the injection valve element. It is also an embodiment feasible, in which the adjustment axis of the control valve element and the adjustment axis of the injection valve element are arranged transversely to the longitudinal extent of the adjustment axes offset from each other. Such an embodiment is suitable for minimizing the injector body volume, in particular when the base plate having the guide extension for guiding the control valve seat is formed as a separate component by a throttle plate which has the outlet throttle and / or the inlet throttle for a control chamber.
  • Fig. 1 is a trained as a common rail injector fuel injector 1 for injecting fuel in a combustion chamber, not shown, also shown an internal combustion engine of a motor vehicle.
  • a high pressure pump 2 delivers fuel from a reservoir 3 in a high-pressure fuel storage 4 (Rail). In this fuel, especially diesel or gasoline, under high pressure, of about 2000 bar in this embodiment, stored.
  • the fuel injector 1 is connected, among other injectors, not shown, via a supply line 5.
  • the supply line 5 opens into a supply channel 6, which in turn opens into a pressure chamber 7 (high-pressure region) of the fuel injector 1.
  • the fuel flowing into the pressure chamber 7 flows in an injection process directly into the combustion chamber of the internal combustion engine.
  • the fuel injector 1 is connected via an injector return port 8 to a return line 9. Via the return line 9, a later to be explained control amount of fuel from the fuel injector 1 to flow to the reservoir 3 and fed from there from the high pressure circuit again.
  • injection valve element 11 Within an injector body 10 is a one-piece in this embodiment injection valve element 11, which may be designed in several parts if necessary, adjustable in the axial direction.
  • the injection valve element 11 is guided within an axially adjacent to the injector body 10 nozzle body 12 at its outer periphery. This only partially shown nozzle body 12 is clamped by means of a union nut, not shown, with the injector body 10.
  • the injection valve element 11 has at its tip 13 a closing surface 14 (sealing surface) with which the injection valve element 11 can be attached in a tight contact with a single point valve element seat 15 formed inside the nozzle body 12.
  • fuel can flow from the pressure chamber 7 through axial passages 18 formed in a guide section 17 on the outer circumference of the injection valve element 11 into a lower annular space 19 formed radially between the injection valve element 11 and the nozzle body 12 in the drawing plane the injection valve element 11 to flow past the nozzle hole assembly 16 and there are injected substantially under high pressure (rail pressure) standing in the combustion chamber.
  • a control chamber 23 is limited, via a radially extending in the sleeve-shaped portion of the throttle plate 22 inlet throttle 24 under high pressure fuel from the pressure chamber. 7 is supplied.
  • the sleeve-shaped section 21 with the control chamber 23 enclosed therein is enclosed radially on the outside by high-pressure fuel, so that an annular guide gap 25 is comparatively fuel-tight radially between the sleeve-shaped section 21 and the injection valve element 11.
  • To increase the fuel-tightness of the guide gap 25 are two in axially spaced annular grooves 26 provided on the outer circumference of the injection valve element 11 within the sleeve-shaped portion 21.
  • the control chamber 23 is connected via a flow restrictor 28 having a drain passage 27 with a valve chamber 29.
  • the valve chamber 29 is surrounded radially on the outside by a sleeve-shaped control valve element 31 which is axially adjustable along an adjustment axis 30.
  • the adjustment axis 30 of the control valve element 31 is aligned with a central axis in the fuel injector 1 adjustment axis of the injection valve element 11.
  • the sleeve-shaped control valve element 31 is part of a pressure-balanced in the axial direction of the control valve 32 (servo valve).
  • fuel can flow into a low-pressure region 33 of the fuel injector 1 and from there to the injector return port 8, when the sleeve-shaped control valve element 31, which is formed integrally with an anchor plate 34 in the embodiment shown, lifted from its spherical control valve seat 35 , ie the control valve 32 is open.
  • the sleeve-shaped control valve element 31 To open the control valve 32, the sleeve-shaped control valve element 31 must be adjusted in the drawing plane downwards in the direction of the injection valve element 11.
  • an electromagnetic actuator 36 with an electromagnet 37 (coil) is provided, which cooperates with the armature plate 34 and in sequence with the control valve element 31 with appropriate energization.
  • the actuator 36 is disposed axially between the armature plate 34 and the throttle plate 22.
  • the sleeve-shaped control valve element 31 in the axial direction in the plane of the drawing down along the adjustment axis 30 in the direction of the injection valve element seat 15 to adjusted and lifts it from its control valve seat 35 from.
  • the flow cross sections of the inlet throttle 24 and the outlet throttle 28 are matched to one another such that when open control valve 32, a net outflow of fuel (fuel control amount) from the control chamber 23 via the valve chamber 29 in the low pressure region 33 of the fuel injector 1 and from there via the Injector return port 8 and the return line 9 results in the reservoir 3.
  • the pressure of the control chamber 23 decreases rapidly, whereby the injection valve element 11 lifts from its injection valve element seat 15, whereby fuel in the sequence from the pressure chamber 7 through the nozzle hole assembly 16 can flow into the combustion chamber.
  • the energization of the electromagnetic actuator 36 is interrupted, whereby the sleeve-shaped control valve member 31 by means of a control spring 38, which is supported on the anchor plate 34 and on a ring member 39 which rests on the throttle plate 22, in the plane of the drawing up its control valve seat 35 is adjusted.
  • the fuel flowing in through the inlet throttle 24 into the control chamber 23 ensures rapid pressure increase in the control chamber 23 and thus a closing force acting on the injection valve element 11. This results in that the injection valve element 11 is moved in the drawing plane down to the injection valve element seat 15, whereby the injection process is terminated.
  • a guide extension 40 is formed, which projects in the axial direction upwards.
  • the drain passage 27 from the control chamber 23 passes through this guide extension 40, in which the outlet throttle 28 is arranged, centric.
  • the guide extension 40 extends into the sleeve-shaped control valve element 31 and serves to guide it during an adjustment movement along the adjustment axis 30.
  • the control valve seat 35 is formed by a control valve seat member 41, which is formed in the embodiment shown as a ball.
  • the spherical control valve seat element 41 is supported in the axial direction on a component 42, which in turn is loosely supported on a plate 43, which in turn rests in the axial direction loosely on a threaded insert 44.
  • the component 42 has a dome-shaped portion 45. This is formed as a part-spherical recess, wherein the part-spherical recess has a larger radius of curvature than the radius of curvature of the spherical control valve seat member 41, for alignment purposes, a rolling of the control valve seat member 41 within the section 45, i. within the recess, relative to the adjustment axis 30, to allow.
  • the diameter of the plate 43 corresponds approximately to the diameter of a bore 46 in a valve element 47, with which the threaded insert 44 is screwed. As a result, no lateral adjustment of the plate 43 within the bore 46 is possible.
  • the diameter of the axially immediately adjacent to the plate 43 disposed member 42 is dimensioned slightly smaller than the diameter of the bore 46, so that the component 42 with its dome-shaped portion 45 relative to the adjustment axis 30, namely perpendicular to this, is displaceable.
  • the control valve seat member 41 in turn can roll within the portion 45 of the component 42.
  • both the control valve seat member 41, and the member 42 and the plate 44 are loose (axially adjustable) within the bore 46 of a valve member 47.
  • the control valve seat member 41 is in operation of the located within the drain passage 27, under high pressure standing fuel in the axial direction upwards pressed directly against the component 42, whereby this in turn is pressed directly in the plane of the drawing up against the plate 43, which in turn is subjected to force against the threaded insert 44.
  • valve member 47 is screwed to the injector body 10 and clamps the actuator 36 against the throttle plate 22, which is supported in the axial direction on an inner annular shoulder 48 of the injector body 10.
  • An end-face sealing surface 49 (ring line), with which the control valve member 31 is supported on the control valve seat member 41, is formed inside a conical shape, wherein a not shown, formed by the sealing surface 49 sealing line at least approximately the same diameter, as the guide extension 40 so as to realize a pressure balance of the control valve 32.
  • Fig. 2 an alternative embodiment of a fuel injector 1 is shown.
  • the operation of the fuel injector 1 according to Fig. 2 corresponds substantially to the operation of the fuel injector 1 according to Fig. 1 , so that in order to avoid repetition in the following essentially the differences to the fuel injector 1 described above are set forth. With regard to the similarities is on the previous figure description as well as on Fig. 1 directed.
  • Fig. 2 It can be seen that the adjustment axis 30 of the sleeve-shaped control valve element 31 is arranged offset radially to an injection valve element adjustment axis 50.
  • the arranged in the pressure chamber 7 control chamber 23 is bounded radially outwardly by a sleeve member 51 which is supported in the axial direction of a throttle plate 22.
  • This throttle plate 22 has, in addition to the outlet throttle 28, the inlet throttle 24 for supplying the control chamber 23, wherein the inlet throttle 24 may alternatively be arranged as a radial passage in the sleeve member 51.
  • the sleeve member 51 is pressed by means of a closing spring 52 in the axial direction in the drawing plane up against the throttle plate 22, wherein the closing spring 52 is supported in the axial direction on a peripheral collar 53 of the one-piece injection valve element 11.
  • the closing spring 52 supports the closing movement of the injection valve element 11.
  • a bottom plate 54 Located on the throttle plate 22 is located axially on a bottom plate 54, within which the drain passage 27 continues in the plane of the drawing upwards. Integral with the bottom plate 54 of the guide extension 40 is formed, which serves to guide the sleeve-shaped control valve member 31 during its axial movement.
  • the bottom plate 54 may be formed as a rotationally symmetrical component, in which case the adjustment axis 30 of the control valve element 31 is aligned in the axial direction with the Einspritzventilelementverstellachse 50.
  • the injection valve member 31 is supported in the axial direction in the plane upwards on a designed as a ball control valve seat member 41 which is relatively unrolled relative to the adjustment axis 30 within a dome-shaped portion 45 of an axially adjacent component 42.
  • the component 42 in turn, together with the control valve seat element 41 is received transversely to the adjustment axis 30 of the control valve element 31 displaceable within a bore 46 in the injector body 10.
  • Fig. 3 is an enlarged version of the in the Fig. 1 and 2 realized control valve seat member 41 shown. This is shaped as a ball. It can be seen that the diameter D D of a front face on the control valve seat member 41 formed sealing surface (sealing line) corresponds to the guide diameter D F , at which the control valve element 31 is guided on the guide extension 40. It can also be seen that the radius of curvature of the spherical control valve seat element 41 is less than the radius of curvature of the part-spherical recess which forms the dome-shaped portion 45 of the component 42 displaceably arranged relative to the adjustment axis 30.
  • control valve seat member 41 is formed at least approximately hemispherical, wherein the control valve seat member 41 is supported with a flat portion 59 on a component 42 which is stationary relative to the adjustment axis 30 is arranged.
  • the control valve seat member 41 is slidably disposed relative to the adjustment axis 30 along the component 42, so that coaxial errors can be compensated.
  • the diameter D D of the sealing surface (seal line) also corresponds in the embodiment shown, the guide diameter D F.
  • the control valve seat 35 is formed partially spherical.
  • Fig. 5 an alternative embodiment is shown, wherein the control valve seat 35 is formed as an inner cone-shaped inner cone.
  • the cone angle of the control valve seat 35 is greater than the cone angle of the front side formed on the control valve element 31 cone.
  • the control valve seat member 41 is transverse to the adjustment axis 30, that is, relative to this, slidably disposed along the component 42, whereby coaxial errors can be compensated.
  • a part-spherical, at least approximately hemispherical, control valve seat member 41 is provided, wherein in the embodiment shown, a flat portion 59 of the control valve seat member 41 forms the formed as a flat seat control valve seat 35.
  • the control valve seat element 41 is received in an internal conical recess 61 of the component 42.
  • angle errors can be corrected, in the event that the component 42 is arranged stationary to the adjustment axis 30.
  • coaxial errors of the control valve element 31 can be compensated relative to the control valve seat 35 formed as a flat seat.
  • the control valve seat element 41 which can be adjusted transversely to the adjustment axis 30, has a control valve seat 35 designed as an outer cone.
  • the diameter D D of the annular sealing surface (sealing line) at least approximately corresponds to the guide diameter D F , so that a pressure-balanced in the axial direction control valve is obtained.

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

Claims (8)

  1. Injecteur de carburant, en particulier injecteur à rampe commune, pour l'injection de carburant dans une chambre de combustion d'un moteur à combustion interne avec un élément de soupape d'injection (11) déplaçable entre une position de fermeture et une position d'ouverture, qui peut être commuté au moyen d'une soupape de commande (32), la soupape de commande (32) présentant un élément de soupape de commande (31) en forme de douille, déplaçable le long d'un axe de réglage (30), qui s'applique hermétiquement contre un élément de siège de soupape de commande (41) dans sa position de fermeture, l'élément de siège de soupape de commande (41) étant disposé de manière déplaçable par rapport à l'axe de réglage (30) de l'élément de soupape de commande (31), caractérisé en ce que l'élément de siège de soupape de commande (41) s'appuie sur un composant (42) déplaçable par rapport à l'axe de réglage (30), notamment coulissant, et est déplaçable par rapport à ce composant (42), notamment par pivotement et/ou roulement.
  2. Injecteur de carburant selon la revendication 1, caractérisé en ce que l'élément de soupape de commande (31) est compensé en pression au moins approximativement dans la direction axiale dans sa position de fermeture.
  3. Injecteur de carburant selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que l'élément de siège de soupape de commande (41) est disposé de manière coulissante et/ou pivotante et/ou roulante, notamment transversalement à l'axe de réglage (30).
  4. Injecteur de carburant selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de siège de soupape de commande (41) présente au moins une portion (60) en forme de bille partielle ou est réalisé sous forme de bille.
  5. Injecteur de carburant selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de siège de soupape de commande (41) présent un siège de soupape de commande (35) en forme de bille partielle ou en forme de cône interne, ou un siège de soupape de commande (35) en forme de cône externe, ou un siège de soupape de commande (35) réalisé sous forme de siège plat.
  6. Injecteur de carburant selon l'une quelconque des revendications précédentes, caractérisé en ce que la soupape de commande (32) est disposée de telle sorte que l'élément de soupape de commande (31) s'ouvrant se déplace dans la direction d'un siège de l'élément de soupape d'injection (15).
  7. Injecteur de carburant selon l'une quelconque des revendications précédentes, caractérisé en ce que l'axe de réglage (30) de l'élément de soupape de commande (31) est disposé de manière décalée latéralement par rapport à un axe de déplacement de l'élément de soupape d'injection (11).
  8. Injecteur de carburant selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un étranglement de sortie (28) associé à une chambre de commande (23) et/ou un étranglement d'entrée (24) associé à la chambre de commande (23) est/sont disposés dans une plaque d'étranglement (22), qui est réalisée sous forme de composant séparé d'une plaque de fond (54) présentant une portion de tige de guidage pour l'élément de soupape de commande (31).
EP09100169A 2008-05-06 2009-03-06 Injecteur de carburant Expired - Fee Related EP2116717B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008001597A DE102008001597A1 (de) 2008-05-06 2008-05-06 Kraftstoff-Injektor

Publications (3)

Publication Number Publication Date
EP2116717A2 EP2116717A2 (fr) 2009-11-11
EP2116717A3 EP2116717A3 (fr) 2009-12-02
EP2116717B1 true EP2116717B1 (fr) 2011-09-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09100169A Expired - Fee Related EP2116717B1 (fr) 2008-05-06 2009-03-06 Injecteur de carburant

Country Status (3)

Country Link
US (1) US7987835B2 (fr)
EP (1) EP2116717B1 (fr)
DE (1) DE102008001597A1 (fr)

Families Citing this family (9)

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EP2116717A2 (fr) 2009-11-11
US20090277421A1 (en) 2009-11-12
EP2116717A3 (fr) 2009-12-02
DE102008001597A1 (de) 2009-11-12
US7987835B2 (en) 2011-08-02

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