• 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 component (1), in particular housing of a high-pressure fuel pump in which at least a first high-pressure channel (4) and a second high-pressure channel (5) are present, the longitudinal axis of the first channel (4) is at an acute or right angle to the longitudinal axis of the second channel (5), wherein the second channel (5) opens into the first channel (4), so that an intersection is formed. The first channel (4) is formed by a central bore (10) and at least one secondary bore (11) enlarging the cross-section of the central bore (10), the longitudinal axis of the minor bore (11) and the longitudinal axis of the central bore (10) being parallel to one another. The central bore (10) is passed through the component (1) and consists of a first, extending over the intersection portion (8) and an adjoining second portion (9), wherein the at least one sub-bore (11) only along the extending first portion (8) and along the second portion (9) no secondary bore is provided.
    公开号:AT512893A4
    申请号:T88/2013
    申请日:2013-02-05
    公开日:2013-12-15
    发明作者:
    申请人:Bosch Gmbh Robert；
    IPC主号:
    专利说明:

    1
    The invention relates to a component, in particular housing of a high-pressure fuel pump, in which at least a first high-pressure channel and a second high-pressure channel are present, wherein the longitudinal axis of the first channel is at an acute or right angle to the longitudinal axis of the second channel and the second channel in the first channel opens, so that an intersection is formed, wherein the first channel of a central bore and at least one of the cross section of the central bore enlarging secondary bore is formed, wherein the longitudinal axis of the sub-bore and the longitudinal axis of the central bore parallel to each other.
    Such a component is known, for example, as the housing of a piston pump of a fuel system. With it, the fuel is compressed to a very high pressure and pressed into a high-pressure fuel storage, in particular in a fuel rail ("Rail") or in integrated memory of storage injectors. There the fuel is stored under very high pressure. To the fuel manifold, a plurality of injection valves are connected, which inject the fuel directly into respective, the injection valves associated combustion chambers.
    In the known components of this type, the fuel in delivery chambers, which are present in the housing, compressed by corresponding piston. About flow channels, which are introduced in the form of holes in the housing or in housing parts of the high-pressure fuel pump, the highly compressed fuel from the individual delivery chambers to a common outlet, the so-called pump collector, From each pumping chamber opens a flow channel or a hole in the Pump collector, wherein the flow channels are at an angle> 0 ° to the pump collector. At the intersection of the flow channels with the pump collector a bore intersection is formed in each case.
    Due to the pressure of up to 2,200 bar prevailing in the high-pressure components of fuel injection systems, stresses develop in the pipes or ducts carrying the media. In the case of pipes, axial stresses, radial stresses and stresses occur in the circumferential direction, of which the stresses in the circumferential direction have the largest share of the pipe load. At bore intersections particularly at acute angles caused by the superposition of the voltages from two or more holes particularly high voltages in the form of tensile stresses in the material. The maximum stress is reached directly at the intersection edge. These points are particularly at non-constant pressures, so with swelling load, high risk of breakage. It is therefore necessary first of all to reduce the hoop stresses.
    In this connection, it has already been proposed to increase the cross-section of the first channel at least in the region of the mouth of the second channel by starting at least one, in particular two cross-sections of the central bore enlarging secondary bores are introduced from a central bore. If the longitudinal axes of the sub-holes and the central hole each include an acute angle with each other, one speaks of a "Fächerverschneidung " or a "telescope intersection". The longitudinal axes of the central bore and the side bores converge in the direction of 3 to a high pressure port of the first channel. A disadvantage of this design is the fact that the central bore and the secondary bores must be drilled from both sides of the component, which leads to a high sensitivity to manufacturing tolerances and high costs.
    The invention is therefore based on the object to reduce the cost of the intersection on the first channel without losing the existing voltage levels in terms of advantages.
    To solve this problem, the invention essentially provides for a component of the type mentioned above, that the central bore is passed through the component and consists of a first, extending over the intersection section and an adjoining second section, and that the at least one Side hole extends only along the first portion and along the second portion no secondary bore is provided. The fact that the central bore is drilled, the number of holes to be made is reduced. The first portion and the second portion of the central bore, which are aligned with each other, are thus formed in a single operation. The cross-sectional enlargement of the first channel is in the region of the intersection, i. realized in the region of the junction of the at least one second channel, characterized in that along the first portion of the central bore least a secondary bore is formed, wherein the secondary bore does not extend through the component, but is formed as a blind hole. In the case of the embodiment 4 according to the invention, it is thus sufficient to drill the at least one Kebenbohrung only from one side of the component, so that the number of holes to be made overall can be significantly reduced.
    A particularly low-tension training succeeds according to a preferred embodiment, when both sides of the central bore each having a cross section of the central bore enlarging secondary bore is formed. Preferably, the longitudinal axes of the central bore and the two side bores are in this case in a common plane.
    The at least one secondary bore may have the same bore diameter as the central bore. Alternatively, it is also conceivable that the at least one secondary bore has a smaller bore diameter than the central bore.
    In any case, the provision of secondary bores preferably leads to the cross-sectional area of the first channel being greater than the cross-sectional area of the second channel. In particular, the cross-sectional area of the second channel may substantially correspond to the cross-sectional area of the central bore of the first channel.
    In order to reduce the stress peaks at the intersection of the sub-bore end with the central bore, a preferred embodiment provides that the bore end of the at least one sub-bore is spherical or with a drilling cone of e.g. 120 ° - 150 °, in particular 140 ° is formed. 5
    In order to enable the connection of high-pressure medium-carrying lines in a simple manner, can further be provided that the central bore at the end of the second section has a high pressure port with an outwardly diverging tapered sealing surface.
    A preferred application of the present invention is that the first channel is a header bore of a high-pressure piston pump, in particular a radial piston pump of a fuel injection system of an internal combustion engine.
    The invention will be explained in more detail with reference to embodiments shown schematically in the drawing. 2 shows an embodiment according to the invention in a first sectional view and FIG. 3 shows the embodiment according to FIG. 2 in a sectional view along the line III-III of FIG. second
    In Fig. 1, a prior art high pressure medium guiding member 1 is shown, e.g. a housing of a high-pressure fuel pump of a fuel injection system of an internal combustion engine. The component 1 has a high-pressure connection 2, which has a conical sealing surface 3, which can interact with a corresponding mating surface of the connecting pipe. The high pressure port 2 leads to a first channel 4, which is designed as a bore in the housing 1. In the first channel 4 opens a right angle a second channel 5, which is also designed as a bore. In order to achieve a cross-sectional enlargement in the region of the intersection between the first channel 4 and the second channel 5, the first channel 6 4 is formed by a central bore and two side bores which extend on both sides of the central bore and increase the cross section of the central bore. In a section 6 extending from the high-pressure port 2 to the axis of the second channel 5, the axes of the sub-bores are at an acute angle to the axis of the central bore, resulting in a fan-like arrangement. In a section 7, which adjoins directly to the section 6, the axes of the side bores are parallel to the axis of the central bore. The bores of the first section 6 and the bores of the second section 7 are bored from opposite sides of the component 1. In the embodiment according to FIG. 1, a total of six bores are thus required. This training is therefore costly and sensitive to manufacturing tolerances,
    In contrast, only three holes are required in the embodiment according to the invention according to FIG. 2, without the voltage level in the region of the intersection being adversely affected. The first channel 4 has a first section 8 and a second section 9, which adjoin one another directly. In this case, the first section 8 extends over the intersection of the second channel 5 with the first channel 4, so that the intersection lies completely in the first section 8. In the second section 9, the first channel 4 is formed only by the central bore 10, whereas the first channel 4 is formed in the first section 8 through the central bore 10 and the side bores 11, as can be seen in particular in the cross-sectional view of FIG. The side bores 11 may be at their end 12 with the help of a
    Ball head are processed to obtain a corresponding curved end surface.
    权利要求:
    Claims (10)
    [1]
    1. component, in particular housing a high-pressure fuel pump, in which a first high pressure passage and at least one second high pressure passage are provided, wherein the longitudinal axis of the first channel is at an acute or right angle to the longitudinal axis of the second channel and the second channel in the first channel opens, so that an intersection is formed, wherein the first channel is formed by a central bore and at least one cross section of the central bore enlarging secondary bore, wherein the longitudinal axis of the sub-bore and the longitudinal axis of the central bore parallel to each other, characterized in that the central bore (10) is passed through the component (1) and consists of a first, extending over the intersection portion (8) and an adjoining second portion (9), and that the at least one sub-bore (11) only along the first Section (8) extends and ent long of the second section (9) no secondary bore is provided.
    [2]
    2. The component according to claim 1, characterized in that on both sides of the central bore (10) each have a cross section of the central bore (10) enlarging secondary bore (11) is formed.
    [3]
    3. The component according to claim 2, characterized in that the longitudinal axes of the central bore (10) and the two side bores (11) lie in a common plane.
    [4]
    4. The component according to claim 1, 2 or 3, characterized in that the at least one secondary bore (11) c, the same bore diameter as the central bore (10).
    [5]
    5. The component according to claim 1, 2 or 3, characterized in that the at least one secondary bore (11) has a smaller bore diameter than the central bore (10).
    [6]
    6. The component according to one of claims 1 to 5, characterized in that the cross-sectional area of the first portion of the first channel (4) is greater than the cross-sectional area of the second channel (5).
    [7]
    7. The component according to one of claims 1 to 6, characterized in that the cross-sectional area of the second channel (5) substantially corresponds to the cross-sectional area of the central bore (10) of the first channel (4).
    [8]
    8. The component according to one of claims 1 to 7, characterized in that the bore end (12) of the at least one secondary bore (11) is spherical or with a drilling cone of e.g. 140 ° is formed.
    [9]
    9. The component according to one of claims 1 to 8, characterized in that the central bore (10) at the end of the second section (9) has a high-pressure connection (2) with an outwardly diverging conical sealing surface (3),
    [10]
    10. The component according to one of claims 1 to 9, characterized in that the first channel (4) is a header bore of a high-pressure piston pump, in particular series piston pump or radial piston pump of an i.O fuel injection system of an internal combustion engine. Vienna, 5 February 2013 Applicant by: Haffner and Keschmann

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    同族专利:
    公开号 | 公开日
    US9677521B2|2017-06-13|
    EP2954190B1|2016-12-14|
    EP2954190A1|2015-12-16|
    KR20150112993A|2015-10-07|
    US20150369191A1|2015-12-24|
    CN104981604A|2015-10-14|
    AT512893B1|2013-12-15|
    JP2016505118A|2016-02-18|
    WO2014122052A1|2014-08-14|
    CN104981604B|2018-04-24|
    JP6069525B2|2017-02-01|
    KR102062613B1|2020-01-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JP2009068371A|2007-09-11|2009-04-02|Denso Corp|Pump|
    WO2009111896A2|2008-03-13|2009-09-17|Ganser-Hydromag Ag|High-pressure delivery pump having a cylinder head, particularly for injection systems for internal combustion engines|
    US2768840A|1946-07-01|1956-10-30|Kobe Inc|Tubing system for fluid operated pumps|
    GB8914478D0|1989-06-23|1989-08-09|Lucas Ind Plc|Fuel injection nozzle|
    DE59907093D1|1998-08-27|2003-10-30|Waertsilae Schweiz Ag|Method of manufacturing a fuel injector and fuel injector|
    DE19925380A1|1999-06-02|2000-12-07|Volkswagen Ag|Fuel injection valve for internal combustion engines|
    DE10152230A1|2001-10-20|2003-04-30|Bosch Gmbh Robert|High pressure resistant injector body|
    JP4119812B2|2003-09-19|2008-07-16|ボッシュ株式会社|Fuel injection valve|
    DE102004018937A1|2004-04-20|2005-11-17|Robert Bosch Gmbh|Fuel injection valve e.g. for direct injecting of fuel into combustion chamber of internal combustion engine, has body with valve seat surface cooperating to sealing seat with opening and lateral end of valve has protective layer|
    GB0602742D0|2005-06-06|2006-03-22|Delphi Tech Inc|Machining method|
    AT422615T|2006-11-27|2009-02-15|Delphi Tech Inc|HOUSING WITH OVERHANGING PASSAGES|
    DE102008040383A1|2008-07-14|2010-01-21|Robert Bosch Gmbh|High pressure resistant fuel injector|
    EP2320084B1|2009-11-06|2012-09-12|Delphi Technologies Holding S.à.r.l.|Housing with intersecting passages for high pressure fluid applications|
    AT509177B1|2009-11-23|2013-09-15|Bosch Gmbh Robert|PRESSURE TUBE FITTINGS FOR COMMON RAIL INJECTION SYSTEM|
    DE102010028046A1|2010-04-21|2011-10-27|Robert Bosch Gmbh|high pressure pump|
    WO2012115698A1|2011-02-23|2012-08-30|Carrier Corporation|Ejector|GB201516152D0|2015-09-11|2015-10-28|Delphi Int Operations Lux Srl|Fuel pump housing|
    DE102016211228A1|2016-06-23|2017-12-28|Robert Bosch Gmbh|High pressure fuel pump with a housing and method for processing channels of a housing of a high pressure fuel pump|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA88/2013A|AT512893B1|2013-02-05|2013-02-05|Component with intermeshing high pressure holes|ATA88/2013A| AT512893B1|2013-02-05|2013-02-05|Component with intermeshing high pressure holes|
    JP2015555684A| JP6069525B2|2013-02-05|2014-01-29|Components with high-pressure holes that communicate with each other|
    PCT/EP2014/051675| WO2014122052A1|2013-02-05|2014-01-29|Component having high-pressure bores that lead into one another|
    CN201480007477.0A| CN104981604B|2013-02-05|2014-01-29|Structural detail with the pressure hole to communicate with each other|
    EP14701997.0A| EP2954190B1|2013-02-05|2014-01-29|Component having high-pressure bores that lead into one another|
    KR1020157020918A| KR102062613B1|2013-02-05|2014-01-29|Component having high-pressure bores that lead into one another|
    US14/765,687| US9677521B2|2013-02-05|2014-01-29|Component having high-pressure bores that lead into one another|
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