• 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:
    In a method for checking and repairing an injector (1) for injecting fuel into the combustion chamber of an internal combustion engine, the injector (1) comprising a nozzle (3), a throttle plate (4) and a control valve (5) and a nozzle retaining nut (6 ), which holds said parts together and with which said parts are fixed to an injector body (7) of the injector (1), the functional components nozzle (3), throttle plate (4) and control valve (5) from the injector body (7) a connection piece (8) serving to connect the functional components (3, 4, 5) with a test stand is screwed to an injector module (2) with the functional components (3, 4, 5) by means of the nozzle retaining nut (6) and the injector module (2) 2) connected to a test bench and subjected to a review and then possibly a repair.
    公开号:AT510462A1
    申请号:T1578/2010
    申请日:2010-09-22
    公开日:2012-04-15
    发明作者:
    申请人:Bosch Gmbh Robert；
    IPC主号:
    专利说明:

    The invention relates to a method for checking and repairing an injector for injecting fuel into the combustion chamber of an internal combustion engine, wherein the injector comprises a nozzle, a throttle plate and a control valve and a nozzle retaining nut which holds said parts together and with which said parts on a Injector body of the injector are attached.
    In servo-controlled injectors for internal combustion engines, in particular in modular common rail injection systems, the control of the injection takes place with the aid of an electronically controlled control or servo valve. The control valve controls the outflow of fuel from the control chamber of an injection nozzle, which realizes the hydraulic actuation of an injection nozzle. Modular common-rail injection systems are injection systems that are primarily used in particularly large engines in which the individual injectors may be mounted at considerable distances from each other, so that the sole use of a common rail for the injectors is not useful. In such engines, it is therefore intended to assign each individual injector its own high-pressure fuel storage, which is integrated in the injector. Such a design is referred to as a modular design, since each injector has its own high-pressure fuel storage and thus can be used as an independent injector unit. Under a high-pressure fuel storage is not a common line to understand this, but it is in a high-pressure fuel storage to a pressure-resistant vessel with an inlet and a derivative whose diameter is significantly increased compared to the high pressure lines, so that a certain amount of injection discharged from the high-pressure fuel storage can be, without causing an immediate pressure drop, as would be the case if the injection quantity would be taken from a common high-pressure line. •
    The modular injectors, to which the present invention relates, in addition to the integrated in the injector high-pressure fuel storage on a functional group consisting of a nozzle, a throttle plate and a control valve as functional components, which are screwed with a nozzle retaining nut with the injector body. The injection characteristic of an injector is influenced exclusively by the tolerance positions of the functional components described above. In order to ensure that the injection quantity of the individual injectors runs within a very narrow tolerance band, it is often not sufficient for the nozzle, throttle plate and servo valve to be manufactured to a tight tolerance. In many cases, these three functional components with specific features are selectively paired with one another or individual properties only selectively produced or set after the other functional components have been measured for their function-critical features. So that an injector works within a very narrow tolerance range, the right combination of nozzle, throttle plate and servo or control valve is crucial. For the initial delivery, the injectors are completely bolted during initial assembly and functionally tested on very costly calibrated test benches. Injectors that are outside the specified tolerance limits are dismantled again, one or more functional components are replaced, the injectors are screwed back on and rechecked. After a certain period of operation on the engine, it is further regularly provided that the injectors are cleaned and disassembled, renewed the functional components as needed and then mounted the entire injectors as in the first delivery case and functionally tested. In both cases, in addition to the relatively light and small functional components at the production site of the injectors, the sometimes very heavy injector bodies, which sometimes weigh 10 kg and more, must be handled in the hitherto known checking and repair procedures. In the case of repair 3, the entire injectors with the high-pressure fuel storage tanks must be collected and transported to a central location where they can be repaired.
    The invention is therefore based on the object to further develop a method of the type mentioned in that for setting and repair of the functional components that determine the injection characteristics of the respective injector, the handling of the heavy and cumbersome storage can be avoided.
    To solve this problem, the method according to the invention is therefore characterized in that the functional components nozzle, throttle plate and servo valve are separated from the injector body, a connection piece connecting the functional components to a test stand is screwed to an injector module with the aid of the nozzle retaining nut with the functional components and the injector module connected to a test bench and subjected to a check and then, if necessary, a repair. Because the injector body can be separated from the functional components, the injector body can remain on the internal combustion engine, while the functional components can be independently subjected to a check and, if necessary, a maintenance, and with little effort already preset new functional components of a second injector module an injector body of an internal combustion engine can be placed so that the internal combustion engine with only little installation effort is ready for use again. A preferred procedure provides that the injector module is disassembled into its individual parts connecting piece, servo valve, throttle plate, nozzle and nozzle retaining nut and the new functional components nozzle, throttle plate and servo valve are bolted to the new nozzle retaining nut with the injector body remaining on the internal combustion engine to a new injector , The over-4 union fitting is preferably bolted to the disassembled functional components and the old nozzle retaining nut, brought back to the manufacturing facility and connected to a test rig, which simulates the connection situation in the internal combustion engine. After checking and repairing the injector module is transported back to the engine and can be used there to exchange the functional components of another injector. In this way, the repair is greatly simplified, since only the small functional components must be brought to the manufacturing facility, whereby the cost of transport and transport costs are significantly reduced.
    According to a preferred embodiment, the method according to the invention is further developed such that the screwing of the connection piece with the functional components to the injector module takes place at the location of the internal combustion engine, that the injector module is subsequently transported to a test stand remote from the location of the internal combustion engine and the functional components are checked, and the repair of the functional components takes place in a production facility remote from the location of the internal combustion engine, without the injector body also being transported to the production facility. In principle, the connection piece serves to be able to carry out a test of the functional components in the injector module thus formed independently of the injector body on a test stand and as a transport lock for the functional components located in the injector module.
    In the installation situation on the internal combustion engine, the functional components nozzle, throttle plate and servo valve are fixed by the nozzle retaining nut on the injector body. After removal, there is a risk that the parts will loosen or be lost during transport for repair. The method according to the invention is therefore preferably developed in such a way that the connecting piece is inserted into the nozzle retaining nut in such a way that the nozzle, the throttle plate and the control valve are retained in the nozzle retaining nut.
    The invention will be explained in more detail with reference to an embodiment schematically illustrated in the drawing.
    1, an injector according to the invention is designated, in which the functional components of the injector are arranged in the form of a nozzle 3, a throttle plate 4 and a control valve 5, the functional components being held by means of a nozzle retaining nut 6 on the injector body 7, which contains a storage volume. are fixed.
    To carry out the method according to the invention, the screw connection between the injector body 7 and the nozzle retaining nut 6 is released and the functional components 3, 4, 5 are removed. As a result, the functional components 3, 4, 5 are connected by means of the nozzle lock nut 6 with a connector 8 to the injection module 2 shown in Fig. 2, which on the one hand, the functional components 3, 4, 5 during transport for inspection or repair in the Holds nozzle retaining nut 6 and on the other hand to the test stand for checking the functional components 3, 4, 5 in the injector module 2 can be connected.
    权利要求:
    Claims (3)
    [1]
    Claims: 1. A method of inspecting and repairing an injector for injecting fuel into the combustion chamber of an internal combustion engine, the injector having a nozzle, a throttle plate and a control valve and a nozzle retaining nut holding said parts together and to which said parts an injector body of the injector are fastened, characterized in that the functional components nozzle, throttle plate and servo valve are separated from the injector body, a connection piece connecting the functional components to a test stand is screwed with the aid of the nozzle retaining nut with the functional components to an injector module and the injector module to a Test stand is connected and subjected to a check and then, if necessary, a repair.
    [2]
    2. A method according to claim 1, characterized in that the screwing of the connection piece with the functional components to the injector module · takes place at the location of the internal combustion engine, that the injector module · is then transported to a remote from the location of the internal combustion engine test bench and the functional components are checked, and the repair of the functional components takes place in a production device remote from the location of the internal combustion engine, without the injector body also being transported to the production device. • ·

    * * * * * * Λ · · * * ♦ * fe * * * * * * * * * * * * »· · · · *
    [3]
    3. The method according to claim 1 or 2, characterized in that the connecting piece is screwed with the nozzle retaining nut such that the nozzle, the throttle plate and the control valve are held in the nozzle retaining nut. Vienna, 22 September 2010 Robert Bosch GmbH by:

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    引用文献:
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    WO2005108772A1|2004-05-03|2005-11-17|Siemens Aktiengesellschaft|Method for producing an injector|
    JPS6060267A|1983-09-12|1985-04-06|Yanmar Diesel Engine Co Ltd|Injectiion pressure measuring device for unit injector|
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    DE4110226A1|1991-03-28|1992-05-27|Bosch Gmbh Robert|Test appts. for injection pressure measurement of pump nozzle - measures pressure via length variations caused by reaction forces during operation of IC engine|
    US6745465B1|1994-05-11|2004-06-08|Caterpillar Inc|Method for assembling an apparatus, such as a fuel injector, using select fit of dimensional control features|
    JPH10252615A|1997-03-14|1998-09-22|Nippon Injector Kk|Leak test device for fuel injection nozzle|
    US6644099B2|2001-12-14|2003-11-11|Specialty Completion Products|Shaped charge tubing cutter performance test apparatus and method|
    DE10250720A1|2002-10-31|2004-05-13|Robert Bosch Gmbh|Injector|
    DE102005004327A1|2005-01-31|2006-08-03|Robert Bosch Gmbh|Fuel injector for use in internal combustion engine, has functional units reversibly connected by non-positive connecting unit and positioning pin at butt joint, and separately produced and tested, where connecting unit has coupling nut|
    DE102005005690B3|2005-02-08|2006-09-28|Siemens Ag|Method for producing a nozzle body and nozzle body|
    DE102005020833A1|2005-05-04|2006-11-09|Robert Bosch Gmbh|Modular jet for automotive fuel injection system has modular components held in line by threaded nuts|
    DE102006046898A1|2006-10-04|2008-04-10|Robert Bosch Gmbh|Throttle plate for solenoid valve|
    DE102006050163A1|2006-10-25|2008-04-30|Robert Bosch Gmbh|Injector i.e. common rail injector, for injecting fuel into combustion chamber of internal combustion engine, has spring pressing piston on seat and casing on surface, where piston diameter in casing corresponds to piston diameter at seat|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA1578/2010A|AT510462B1|2010-09-22|2010-09-22|METHOD FOR CHECKING AND REPAIRING A FUEL INJECTOR|ATA1578/2010A| AT510462B1|2010-09-22|2010-09-22|METHOD FOR CHECKING AND REPAIRING A FUEL INJECTOR|
    US13/825,612| US9228552B2|2010-09-22|2011-09-22|Method for testing and repairing a fuel injector|
    CN201180045484.6A| CN103109073B|2010-09-22|2011-09-22|For testing and keep in repair the method for fuel injector|
    PCT/AT2011/000390| WO2012037590A1|2010-09-22|2011-09-22|Method for testing and repairing a fuel injector|
    KR20137010027A| KR101495511B1|2010-09-22|2011-09-22|Method for testing and repairing a fuel injector|
    JP2013529506A| JP5718469B2|2010-09-22|2011-09-22|How to test and repair a fuel injector|
    EP11767597.5A| EP2619441B1|2010-09-22|2011-09-22|Method for testing and repairing a fuel injector|
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