• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:AT510318A1
    申请号:T0076711
    申请日:2011-05-26
    公开日:2012-03-15
    发明作者:
    申请人:Man Diesel & Turbo Se；
    IPC主号:
    专利说明:

    The invention relates to a centering device for a
    Fuel injector for centering the
    Fuel injector on a nozzle carrier. Furthermore, the invention relates to a fuel injection nozzle, a nozzle carrier for the fuel injection nozzle and an arrangement of the centering device and at least the
    Fuel injector.
    Conventionally known internal combustion engines, such as marine diesel engines, have multiple cylinders. Each cylinder of such an internal combustion engine is associated with at least one fuel injector for supplying fuel to the respective cylinder, each fuel injector being centered and fixed to a nozzle carrier of the respective cylinder. The so-called nozzle carriers are mounted on cylinder heads of the respective cylinders, namely in a defined relative position to the cylinder head. The fuel injection nozzles are centered and mounted on the nozzle carriers, namely also in a defined relative position to the nozzle carrier and thus cylinder head.
    In known from practice internal combustion engines, the centering of a fuel injector to a corresponding nozzle carrier using so-called dowel pins on the one hand engage in dowel holes of the nozzle carrier and on the other hand in dowel holes of the fuel injector. The centering of a fuel injector on a nozzle carrier using dowel pins has the disadvantage that the dowel holes are subject to tolerances, whereby the mountability of the dowel pins is difficult. Furthermore, the dowel pins can break off or shear during assembly and disassembly as a result of mechanical overloading and thus destroyed. In this case, a costly repair is required. 2
    Another disadvantage of the dowel pins for centering a fuel injector on a nozzle carrier is that the dowel holes into which project the dowel pins are inserted in sealing surfaces between the fuel injector and the nozzle carrier, and thus the dowel pins after mounting the same in the nozzle holder relative to the sealing surface protrude from the same. To edit the sealing surface of the nozzle carrier, therefore, the dowel pins must in turn be removed consuming from the nozzle carrier. That too is disadvantageous.
    On this basis, the invention is based on the object to provide a novel centering device for a fuel injector, with which the above-mentioned disadvantages can be avoided.
    This object is achieved by a centering device according to claim 1. The centering device according to the invention has a sleeve-like base body, wherein the sleeve-like base body has a recess into which from a first side a portion of a fuel injector and from an opposite second side, a portion of a nozzle carrier is inserted, wherein the recess of the sleeve-like body of an Innenkontor of sleeve-like body is defined, which allows a centering of the fuel injection nozzle on the nozzle carrier at least in a defined relative position.
    The present invention proposes a completely new way of centering a fuel injector of a cylinder of an internal combustion engine on a nozzle carrier of the cylinder of the internal combustion engine. Thus, the centering device according to the invention comprises a sleeve-like base body, wherein both a portion of the
    Fuel injector and a portion of the nozzle carrier is insertable into a recess of the sleeve-like body, namely from different sides.
    An inner contour of the recess of the sleeve-like base body is formed such that the injection nozzle and the nozzle carrier can be introduced only in a defined relative position in the recess of the sleeve-like base body, whereby the centering device permits centering of the fuel injection nozzle on the nozzle carrier at least in a defined relative position.
    By using such a centering device with a sleeve-like body, the disadvantages of the dowel pins used for centering in practice are avoided. So, neither in the nozzle holder still in the
    Fuel injector, namely in the sealing surfaces thereof, dowel holes are introduced. It follows from this that no components protrude from the sealing surfaces and must be removed for processing the sealing surfaces.
    Furthermore, the centering device according to the invention with a sleeve-like body is significantly less sensitive to mechanical stress, so that there is less risk of damage to the centering during assembly and disassembly. Nevertheless, should be during assembly or disassembly a mechanical overload of the. Centering device according to the invention, it can be easily replaced without much effort and without further tools.
    Furthermore, by the component design described above, the transmission of a much larger tightening torque of the nozzle lock nut is possible, which is increasingly necessary in view of constantly increasing injection pressures in order to achieve sufficient tightness.
    Preferably, the Innenkontor is polygonal-shaped. Then, when the inner contour of the sleeve-like base body of the centering device according to the invention is polygonal-shaped, it is particularly preferred to produce.
    Furthermore, the invention relates to a fuel injector, a nozzle carrier and arrangements of the centering device and at least the fuel injector and optionally from the nozzle carrier.
    Preferred embodiments of the invention will become apparent from the dependent claims and the description below. Embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:
    1 shows an arrangement of centering device,
    Fuel injection nozzle and nozzle carrier in exploded view; and
    2a to 2c: the centering device in different views,
    Fig. 3a, b another embodiment of a centering device.
    The present invention relates to a centering device for centering a fuel injector of an internal combustion engine, preferably one
    Ship diesel engine, on a nozzle carrier of a cylinder of the internal combustion engine.
    Furthermore, the invention relates to a fuel injector of such an internal combustion engine, a nozzle carrier of such an internal combustion engine, an arrangement of the centering device and the fuel injection nozzle and a
    Arrangement of the centering device, the fuel injector and the nozzle carrier.
    1 shows an arrangement of a fuel injection nozzle 1, a nozzle carrier 2 and a centering device 3 in a perspective exploded view. In this case, only a lower end portion is shown by the nozzle carrier 2, on which a sealing surface 4 is formed, which cooperates in the assembled state with a sealing surface 5 of the fuel injector 1. In Fig. 1 further holes in the region of the fuel injector 1 and the nozzle carrier 2 are visible, namely on the one hand bores 6 and 7, which serve to guide fuel, and on the other holes 8 and 9, the recording and leadership of a nozzle needle, not shown or valve needle serve.
    The nozzle carrier 2 is mounted on a cylinder head, not shown, of a cylinder of an internal combustion engine in a unique relative position. Furthermore, the
    Fuel injector 1 may be mounted on the nozzle carrier 2 in a unique relative position, wherein the centering of the fuel injector 1 on the nozzle carrier 2 by means of the centering device 3 shown in FIG. 1 according to the invention.
    The centering device 3a, b according to the invention has a sleeve-like base body 10. The sleeve-like base body 10 has a recess 11 into which a portion 12 of the fuel injector 1 can be inserted from a first side and a portion 13 of the nozzle carrier 2 can be inserted from an opposite, second side , The recess 11 of the sleeve-like base body 10 of the centering device 3a, b is defined by an inner contour 14, the centering of the fuel injector 1 on the nozzle carrier 2 in the case of the centering device 3a exclusively in a single and in the case of the centering 3b at least in a defined
    Relative position allows. The insertable into the recess 11 of the sleeve-like body 10 of the centering device 3a, b section 12 of the fuel injector 1 has an adapted to the inner contour 14 of the sleeve-like body 10 outer contour 15. Likewise, the section 13 of the nozzle carrier 2, which from the opposite side into the recess 11 of the sleeve-like base body 10 of the centering device 3, b can be inserted, via an adapted to the inner contour 14 of the recess 11 of the sleeve-like body 10 outer contour 16th
    Preferably, the inner contour 14 is polygonal-shaped.
    As already indicated and shown in Fig. 3a, b, according to a further advantageous embodiment, the polygonal inner contour 14 may be performed axisymmetric.
    In this case, the inner contour 14 of the recess 11 is formed such that the portion 13 of the nozzle carrier 12 is insertable into the recess 11 at least in a defined relative position, as well as the portion 12 of the fuel injector. 1
    In the embodiment of the centering device 3b according to FIG. 3a, or the illustration FIG. 3b of the section S1-S1 in FIG. 3a, the recess 11 is thereby varied in diameter. A first region 21 of the axial extent of the recess 11 is for receiving the portion 12 of the injection nozzle 1 and a second region 22 is provided for receiving the portion 13 of the nozzle carrier 2. The region 21 of the recess 11 is smaller in diameter than the region 22 of the recess 11 executed. This design has the advantage of being able to dimension the components fuel injector and nozzle carrier 2 taking into account the space available. The inner contour 14 follows here an axisymmetric hexagonal shape.
    Accordingly, therefore, the centering device 3a, b, the centering of the fuel injector 1 on the nozzle carrier 2 either in the case 3a (Fig. 2a, b, c) exclusively in a single defined relative position, or the centering device in the case 3b (Fig. 3a, b) Centering of the fuel injector 1 on the nozzle carrier 2 in preferably two defined relative positions.
    In the preferred embodiment, the inner contour 14 of the recess 11 of the sleeve-like body 10 of the centering device 3a, b according to the invention is designed such that the portion 12 of the fuel injector 1 and the portion 13 of the nozzle carrier 2 each with play in the sleeve-like body 10, namely in the recess 11 of the same, are insertable. In this case, then serves the centering device 3a, b exclusively centering or alignment of the fuel injector 1 on the nozzle carrier 2. The actual fixation and thus assembly of the fuel injector 1 on the nozzle carrier 2 is then preferably by means of a separate union nut, not shown, which on the one hand the centering 3a, b and on the other hand, sections 17 and 18 of FIG
    Fuel injector 1 and nozzle carrier 2 surrounds. These sections 17 and 18 of the fuel injection nozzle 1 and the nozzle carrier 2 are sections which adjoin the sections 12 and 13, which have an outer contour adapted to the inner contour 14 of the centering device 3 a, b, and with respect to these sections 12 and 13 project radially such that they form stops which defines the axial position of the centering device 3a, b between the fuel injector 1 and nozzle carrier 2.
    Preferably, the section 18 of the nozzle carrier 2 is associated with an external thread, not shown, which is provided with a
    Internal thread of the union nut, also not shown cooperates to mount a aligned by means of the centering device 3 on the nozzle carrier 2 fuel injector 1 on the nozzle carrier 2.
    In contrast, it is also possible, the inner contour 14 of the recess 11 of the sleeve-like body 10 of the centering device 3 a, b to be designed such that the sections 12 and 13 of the fuel injector 1 and nozzle carrier 2 each with a tight play, transition or with a Press fit into the recess 11 engage.
    The present invention proposes a novel and simple centering of a fuel injector 1 on a nozzle carrier 2 by means of a sleeve-like centering device. On required by practice dowel pins can thus be dispensed with. This not only reduces the number of components required for centering, but also the centering device 3a, b according to the invention is less sensitive to mechanical stress. Should nevertheless occur a mechanical overload, as a result of which the sleeve-like centering device is destroyed, it is interchangeable with little effort without tools.
    The inner contour 14 of the sleeve-like centering device 3 a is preferably provided by a polygonal profile, which is designed in particular axially symmetrical. Such a polygonal profile can be produced by non-circular or non-circular grinding. Since the outer surfaces of the fuel injector 1 and nozzle carrier 2 must be revised anyway following a heat treatment, the introduction of a polygonal profile into the sections 12 and 13 of the same results in no or only minor production-related additional expenditure. The centering of a fuel injection nozzle on the nozzle carrier of a cylinder of an internal combustion engine is accordingly in the sense of a preferably polygonal shaft-hub connection.
    In the preferred embodiment, the inner contour 14 of the recess 11 of the sleeve-like body 10 of the centering device 3a, as best seen in Fig. 2b, designed as a triangular polygon profile, wherein the contour or the radius is adapted to at least one corner-like portion of the triangular polygonal profile to allow a clear centering of the fuel injector 1 on the nozzle carrier 2 via the centering device 3a. As already stated, the sections 12 and 13 of the nozzle carrier 2 and the fuel injection nozzle 1, which project into the recess 11, are correspondingly contoured. 10 'List of Reference Signs 1 Fuel Injector 2 Nozzle Carrier 3a, b Centering Device 4 Sealing Surface 5 Sealing Surface 6 Fuel Bore 7 Fuel Bore 8 Bore for Nozzle Needle 9 Bore for Nozzle Needle 10 Base 11 Recess 12 Section 13 Section 14 Inner Contour 15 Outer Contour 16 Outer Contour 17 Section 18 Section 21 First Region 22 Second Area
    权利要求:
    Claims (9)
    [1]
    1. Centering device for a fuel injector, namely for centering a fuel injector on a nozzle carrier of a cylinder of an internal combustion engine, with a sleeve-like base body (10), wherein the sleeve-like base body (10) has a recess (11) into which a portion (12) of a fuel injection nozzle (1) from a first side and a portion (13) of a nozzle carrier (2) from an opposite second side. is insertable, wherein the recess (11) of the sleeve-like base body (10) of an inner Kontor (14) of the sleeve-like base body (10) is defined, which allows centering of the fuel injector (1) on the nozzle carrier (2) at least in a defined relative position.
    [2]
    2. Centering device according to claim 1, characterized in that in the recess (11) of the sleeve-like base body (10) insertable portion (12) of the fuel injector (1) to the inner contour (14) of the sleeve-like base body (10) adapted outer contour ( 15).
    [3]
    3. Centering device according to claim 1 or 2, characterized in that in the recess (11) of the sleeve-like base body (10) insertable portion (13) of the nozzle carrier (2) adapted to the inner contour (14) of the sleeve-like base body (10) Having outer contour (16).
    [4]
    4. centering device according to one of claims 1 to 3, characterized in that the Innenkontor (14) is polygonal-shaped. 12 '12' • * • • • • * * * * * * * * * * * * * *
    [5]
    5. Centering device according to one of claims 1 to 4, characterized in that the Innenkontor (14) is formed achssyinmetrisch.
    [6]
    6. Centering device according to claim 5, characterized in that the recess 11 thereby varies in diameter, such that a first region (21) of the axial extension of the recess (11) for receiving the portion (12) of the injection nozzle (1) and a second Area (22) for receiving the portion (13) of the nozzle carrier (2) is provided, wherein the region (21) of the recess (11) is made smaller in diameter than the region (22) of the recess (11).
    [7]
    7. centering device according to claim 6, characterized in that the inner contour (14) of the recess (11) follows an axisymmetric hexagonal shape.
    [8]
    8. centering device according to one of claims 1 to 7, characterized in that the Innenkontor (14) is formed such that the portion (12) of the fuel injection nozzle (1) and the portion (13) of the nozzle carrier (2) with play in the sleeve-like base body (10) are insertable, wherein for fixing the modules, a nut is used, whose internal thread cooperates with an external thread of the nozzle carrier (2).
    [9]
    9. A fuel injector of a cylinder of an internal combustion engine, which is centered on a nozzle carrier of the cylinder via a centering device according to one of claims 1 to 8, wherein a portion (12) of the fuel injector (1) has an outer contour (15) which is connected to an inner contour of sleeve-like base body (10) of the centering device (3a, b) is adapted. Nozzle carrier of a cylinder of an internal combustion engine, on which a fuel injection nozzle of the cylinder can be centered via a centering device according to one of claims 1 to 8, wherein a section (13) of the nozzle carrier (2) has an outer contour (16) which is in an inner contour (14). the sleeve-like base body (10) of the centering device (3) is adapted, arrangement of a centering device (3a, b) according to one of claims 1 to 8 and a fuel injection nozzle (1) according to claim 9. arrangement of a centering device (3a, b) according to One of claims 1 to 8, a fuel injection nozzle (1) according to claim 9 and a nozzle carrier (2) according to claim 10.
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE102005012682A1|2004-03-19|2005-10-13|Denso Corp., Kariya|Fuel injection nozzle for internal combustion engine has fitting construction with fitting element with first engagement sections in one piece with body section, and second engagement sections on circumferential face of nozzle body|
    DE3705587C2|1987-02-21|1994-01-27|Bosch Gmbh Robert|Electromagnetically operated valve, in particular fuel injection valve|
    DE19734196A1|1997-08-07|1999-02-11|Hatz Motoren|Control device and method for its production|
    DE10017112B4|2000-04-06|2006-06-01|Schaeffler Kg|locknut|
    DE10155679A1|2001-11-13|2003-05-28|Bosch Gmbh Robert|Fuel injection valve has external outline of screw shell suitable for screw tool exerting tangential force on shell|
    DE10156021A1|2001-11-15|2003-06-26|Bosch Gmbh Robert|fuel injection system|
    JP2007040187A|2005-08-03|2007-02-15|Toyota Motor Corp|Fuel injection valve|
    DE102006008648A1|2006-02-24|2007-08-30|Robert Bosch Gmbh|Fuel e.g. diesel or petrol, injecting device for internal combustion engine, has valve unit including control piston and nozzle needle that are coupled with each other by hydraulic coupler, and guiding unit guiding fluid outlet of piston|
    CN201361598Y|2008-11-07|2009-12-16|清华大学|Dripping-free air auxiliary atomizing nozzle|DE102012203621A1|2012-03-07|2013-09-12|Man Diesel & Turbo Se|fuel injector|
    DE102012208087A1|2012-05-15|2013-11-21|Man Diesel & Turbo Se|fuel Injector|
    JP6863718B2|2016-11-21|2021-04-21|三菱パワー株式会社|Gas turbine combustor|
    法律状态:
    2019-01-15| HC| Change of the firm name or firm address|Owner name: MAN ENERGY SOLUTIONS SE, DE Effective date: 20181204 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102010039980A|DE102010039980A1|2010-08-31|2010-08-31|Centering device for a fuel injector|
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