WO2022014637A1 - Auxiliary support structure for internal combustion engine, and internal combustion engine - Google Patents

Auxiliary support structure for internal combustion engine, and internal combustion engine Download PDF

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Publication number
WO2022014637A1
WO2022014637A1 PCT/JP2021/026454 JP2021026454W WO2022014637A1 WO 2022014637 A1 WO2022014637 A1 WO 2022014637A1 JP 2021026454 W JP2021026454 W JP 2021026454W WO 2022014637 A1 WO2022014637 A1 WO 2022014637A1
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Prior art keywords
internal combustion
combustion engine
fixed
support structure
fixed portion
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PCT/JP2021/026454
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French (fr)
Japanese (ja)
Inventor
恒 小澤
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いすゞ自動車株式会社
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Priority to CN202180042687.3A priority Critical patent/CN115917127A/en
Publication of WO2022014637A1 publication Critical patent/WO2022014637A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • This disclosure relates to an auxiliary support structure of an internal combustion engine and an internal combustion engine.
  • auxiliary machine support structure of an internal combustion engine for example, a cylinder block, a fuel pump which is an auxiliary machine arranged around the cylinder block, and a fuel pump extending in a direction orthogonal to the wall surface of the cylinder block are extended and extended.
  • a structure is disclosed in which one end side in the extending direction is fixed to a wall surface and a bracket for mounting a fuel pump (auxiliary machine) is provided on the other end side in the extending direction (see, for example, Patent Document 1).
  • auxiliary machine support structure of the internal combustion engine for example, the cylinder block, the fuel injection pump (auxiliary machine), and the fuel injection pump (auxiliary machine) extend in a direction orthogonal to the wall surface of the cylinder block, and one end side in the extending direction is fixed to the wall surface.
  • a structure including a bracket on which a fuel injection pump is mounted on the other end side in the extending direction see, for example, Patent Document 2.
  • a vibration system is configured in which a bracket (rigid member) for mounting an auxiliary machine is fixed to the wall surface of a cylinder block in a cantilever shape.
  • This vibration system induces elastic vibration in which the auxiliary machine is displaced relative to the cylinder block, and causes resonance at its natural frequency.
  • noise is increased by transmitting this vibration to the cylinder block and radiating it. As a result, it may cause reliability and durability problems such as damage to parts.
  • An object of the present disclosure is to provide an auxiliary support structure for an internal combustion engine and an internal combustion engine capable of reducing noise.
  • the auxiliary support structure of the internal combustion engine in the present disclosure is Auxiliary equipment placed around the internal combustion engine and A cylinder block having a wall surface and a flange portion extending in a direction orthogonal to the wall surface and accommodating a piston.
  • the internal combustion engine in the present disclosure is The auxiliary machine support structure is provided.
  • noise can be reduced.
  • FIG. 1 is a perspective view schematically showing an auxiliary machine support structure of an internal combustion engine according to an embodiment of the present disclosure.
  • FIG. 2 is a diagram schematically showing an auxiliary machine support structure according to a comparative example.
  • FIG. 3 is a diagram showing an analysis result of vibration behavior in the auxiliary machine support structure according to the comparative example.
  • FIG. 4 is a diagram showing an example of the relationship between the frequency and the noise level when the auxiliary machine resonates.
  • FIG. 1 is a perspective view schematically showing an auxiliary machine support structure 100 of the internal combustion engine 1 according to the embodiment of the present disclosure.
  • an X-axis, a Y-axis, and a Z-axis are drawn.
  • the direction in which a predetermined angle is tilted clockwise with respect to the left-right direction is referred to as the vehicle width direction or the X direction
  • the diagonally lower right direction is one side of the vehicle width direction or "+ X direction”
  • the diagonally upper left direction is the vehicle width direction. It is called the other side or "-X direction”.
  • the vertical direction is referred to as the vehicle height direction or the Y direction
  • the upward direction is referred to as "+ Y direction”
  • the downward direction is referred to as "-Y direction”.
  • the direction tilted by a predetermined angle counterclockwise with respect to the left-right direction is referred to as the vehicle front-rear direction, front-rear direction or Z direction
  • the diagonally downward left direction is the vehicle front direction, front direction or "+ Z direction", right.
  • the diagonally upward direction is referred to as the vehicle rear direction, the rear direction, or the "-Z direction”.
  • the auxiliary machine support structure 100 of the internal combustion engine 1 includes the auxiliary machine 10, the cylinder block 20, and the bracket 30.
  • the auxiliary machine 10 shown in FIG. 1 is arranged around the internal combustion engine 1.
  • the auxiliary machine 10 is a fuel supply pump that supplies fuel to a fuel injection valve (not shown) at high pressure.
  • a fuel pipe 12 (part of which is shown in FIG. 1) is connected from the fuel supply pump to the main body of the internal combustion engine 1.
  • the auxiliary machine 10 according to the present disclosure is not limited to the fuel supply pump, and is driven by the power taken out from the internal combustion engine 1 such as an air compressor, an oil pump, a water pump, and a generator, and has an internal combustion engine. It may be a device for operating the engine 1.
  • the internal combustion engine 1 shown in FIG. 1 includes a cylinder block 20 having a plurality of cylinders (not shown) and a piston (not shown) reciprocatingly housed in the cylinders, and burns fuel in the cylinders. The force that the gas pushes the piston is taken out as power.
  • the cylinder block 20 has a wall surface 22 and a flange portion 24 extending in a direction orthogonal to the wall surface 22.
  • the wall surface 22 is a wall surface extending on a YZ plane.
  • the flange portion 24 is bent in the + X direction from the connection portion connected to the wall surface 22.
  • the flange portion 24 has a mounting surface 26 extending on an XY plane. The end portion of the flange portion 24 in the ⁇ X direction extends along the Y axis.
  • the bracket 30 has a first fixed portion 32, a second fixed portion 34, and a joint portion 36.
  • the first fixed portion 32, the second fixed portion 34, and the joint portion 36 are integrally formed of, for example, aluminum, stainless steel, iron, or an alloy.
  • Auxiliary equipment 10 is attached to the first fixed portion 32.
  • the auxiliary machine 10 mounted on the first fixed portion 32 is a device whose longitudinal direction is the vehicle front-rear direction (Z direction).
  • One end of the auxiliary machine 10 in the longitudinal direction is fixed to the first fixed portion 32.
  • the other end side of the auxiliary machine 10 in the longitudinal direction extends in the + Z direction.
  • the first fixed portion 32 extends on the XY plane. That is, the first fixed portion 32 extends along the mounting surface 26.
  • the first fixed portion 32 is fixed to the flange portion 24 by a fixing tool (for example, a bolt).
  • the ⁇ X direction end portion of the first fixed portion 32 extends along the Y axis.
  • the first fixed portion 32 extends in a plurality of different directions on the XY plane. Specifically, the first fixed portion 32 has an extending portion 321 extending in one side (+ X direction) in the vehicle width direction from the position where the auxiliary machine 10 is mounted. Further, the first fixed portion 32 has an extending portion 322 extending upward (+ Y direction) from the position where the auxiliary machine 10 is mounted. Further, the first fixed portion 32 has an extending portion 323 extending downward ( ⁇ Y direction) from the position where the auxiliary machine 10 is mounted.
  • Pilot holes 321h, 322h, and 323h are provided in each of the extending portions 321, 322, and 323, respectively.
  • the first fixed portion 32 is fixed to the flange portion 24 by a fixing tool passed through each of the prepared holes 321h, 322h, and 323h. That is, the direction in which the first fixed portion 32 is fixed by the fixing tool is the same as the vehicle front-rear direction (Z direction) orthogonal to the XY plane, as shown by the solid arrow in FIG.
  • the second fixed portion 34 extends along the wall surface 22. Specifically, the second fixed portion 34 extends from the position of the first fixed portion 32 in the vehicle front direction (+ Z direction) on the YZ plane. The end portion of the second fixed portion 34 in the ⁇ Z direction extends along the Y axis. As shown in FIG. 1, the other end side of the auxiliary machine 10 in the longitudinal direction extends in the + Z direction. Therefore, the second fixed portion 34 extends along the auxiliary machine 10.
  • the second fixed portion 34 is fixed to the wall surface 22 by a fixing tool (for example, a bolt).
  • the second fixed portion 34 extends in each direction from four different locations on the YZ plane. Specifically, the second fixed portion 34 has an extending portion 341 extending upward (+ Y direction) from the position of the side end portion close to the first fixed portion 32. Further, the second fixed portion 34 has an extending portion 342 extending downward ( ⁇ Y direction) from the position of the side end portion close to the first fixed portion 32. Further, the second fixed portion 34 has an extending portion 343 extending upward (+ Y direction) from the position of the side end portion separated from the first fixed portion 32. Further, the second fixed portion 34 has an extending portion 344 extending downward ( ⁇ Y direction) from the position of the side end portion separated from the first fixed portion 32.
  • Pilot holes 341h, 342h, 343h, and 344h are provided in each of the extending portions 341, 342, 343, and 344.
  • the second fixed portion 34 is fixed to the wall surface 22 by a fixing tool passed through each of the prepared holes 341h, 342h, 343h, and 344h. That is, the direction in which the second fixed portion 34 is fixed by the fixing tool is the same as the vehicle width direction (X direction) orthogonal to the YZ plane, as shown by the broken line arrow in FIG.
  • the connecting portion 36 connects the ⁇ X direction end portion of the first fixed portion 32 and the ⁇ Z direction end portion of the second fixed portion 34. As described above, the end portion of the first fixed portion 32 in the ⁇ X direction extends along the Y axis. Further, the end portion of the second fixed portion 34 in the ⁇ Z direction extends along the Y axis.
  • the joint portion 36 that connects the end portion in the ⁇ X direction and the end portion in the ⁇ Z direction extends along the Y axis.
  • the joint portion 36 is arranged along the corner portion 28 composed of the wall surface portion 22 and the flange portion 24.
  • the auxiliary machine 10 When the auxiliary machine 10 resonates, as described above, the ⁇ X direction end portion of the flange portion 24 extends along the Y axis, and the ⁇ X direction end portion of the first fixed portion 32 extends along the Y axis. Since it extends as such, the vibration behavior of fanning the flange portion 24 and the first fixed portion 32 fixed to the flange portion 24 in the front-rear direction (Z direction) around the Y axis occurs. However, by providing a fixing point on the cylinder block 20 side, that is, by fixing the second fixed portion 34 of the bracket 30 to the wall surface 22, the auxiliary machine 10 and the flange portion 24 are integrated. Since the corner portion 28 composed of the wall surface 22 and the flange portion 24 is firmly fixed, the amplitude of the vibration behavior is reduced. This vibration is transmitted to the cylinder block 20 and radiated noise can be reduced.
  • the second fixed portion 34 is placed on the wall surface 22 in the vehicle width direction (X) by the fixing tool (bolt). Since it is fixed in the same direction as the direction), the energy of the vibration behavior is absorbed by the expansion and contraction deformation of the fixture. From this point as well, noise can be reduced by reducing the amplitude of the vibration behavior.
  • the second fixed portion 34 when a force that causes the second fixed portion 34 to move in the Y direction and / or the Z direction with respect to the wall surface 22 is generated due to the vibration behavior, the second fixed portion 34 is a fixture (bolt) as described above. Because it is fixed to the wall surface 22 in the same direction as the vehicle width direction (X direction), the fixture undergoes shear deformation due to the vibration behavior, so that the energy of the vibration behavior is absorbed. Further, since the second fixed portion 34 extends along the wall surface 22, the energy of the vibration behavior is also absorbed by the frictional resistance force generated between the second fixed portion 34 and the wall surface 22. From these points as well, noise can be reduced by reducing the amplitude of vibration behavior.
  • the second fixed portion 34 is fixed to the wall surface 22 by the fixing tool, and the connecting portion 36 is the first fixed portion 32 and the first fixed portion 32.
  • the amplitude of the vibration behavior can be reduced by connecting the two fixed portions 34 and by extending the second fixed portion 34 along the wall surface 22. As a result, it becomes possible to reduce noise.
  • FIG. 2 is a diagram schematically showing the auxiliary machine support structure 200 according to the comparative example.
  • the second fixed portion 34 in the auxiliary machine support structure 200 according to the comparative example, the second fixed portion 34, the fixing tool for fixing the second fixed portion 34 to the wall surface 22, and the first fixed portion 32 and the first fixed portion 32. 2 It differs from the auxiliary machine support structure 100 according to the present embodiment in that there are no parts for reinforcing the flange portion 24 such as the joint portion 36 that connects the fixed portion 34 with the reinforcing parts.
  • FIG. 3 is a diagram showing an analysis result of vibration behavior in the auxiliary machine support structure 200 according to the comparative example.
  • FIG. 3 shows an auxiliary machine support structure 200 defined by grouping a predetermined number of elements.
  • the tip of the auxiliary machine 10 fuel supply pump
  • both ends of the flange portion 24 in the + X direction are shown by the contacts P2 and P3 with the wall surface 22 of the flange portion 24.
  • Both ends of the connection portion in the Y direction are indicated by contacts P4 and P5.
  • the dashed arrow in FIG. 3 when the contact P1 vibrates in the X direction, the flange portion 24 has the contacts P2 and P3 in the front-back direction (Z direction) as shown by the solid arrow in FIG. A fan-like vibration behavior occurs.
  • FIG. 4 is a diagram showing an example of the relationship between the frequency and the noise level when the auxiliary machine 10 resonates.
  • the horizontal axis of FIG. 4 indicates the frequency [Hz], and the vertical axis indicates the noise level [dBA].
  • FIG. 4 shows the noise level with reinforcement (in the case of the auxiliary machine support structure 100 according to the present embodiment) by a dotted line, and the noise level without reinforcement (in the case of the auxiliary machine support structure 200 according to the comparative example). Shown by a solid line.
  • the auxiliary machine support structure 100 according to the present embodiment is only 2 [dBA] more than the auxiliary machine support structure 200 according to the comparative example. It can be confirmed that it is reduced.
  • the auxiliary support structure 100 of the internal combustion engine includes an auxiliary machine 10 arranged around the internal combustion engine 1, a wall surface 22, and a flange portion 24 extending in a direction orthogonal to the wall surface 22.
  • a connecting portion 36 for connecting the first fixed portion 32 and the second fixed portion 34.
  • the bracket 30 integrates the auxiliary machine 10 with the flange portion 24, so that the amplitude of the vibration behavior of the flange portion 24 can be reduced. As a result, it becomes possible to reduce noise. As a result, it is possible to improve the durability of the fuel pipe 12 connected from the auxiliary machine 10 which is a fuel supply pump to the main body of the internal combustion engine 1.
  • the first fixed portion 32 extends along the flange portion 24.
  • vibration behavior occurs such that the first fixed portion 32 moves with respect to the mounting surface 26 (XY plane)
  • the energy of the vibration behavior is generated by the frictional resistance force generated between the first fixed portion 32 and the flange portion 24. Is absorbed. From this point as well, noise can be reduced by reducing the amplitude of the vibration behavior.
  • the second fixed portion 34 extends along the wall surface 22.
  • the energy of the vibration behavior is absorbed by the frictional resistance force generated between the second fixed portion 34 and the wall surface 22. Will be done. From this point as well, noise can be reduced by reducing the amplitude of the vibration behavior.
  • the second fixed portion 34 extends in the + Z direction along the auxiliary machine 10.
  • the auxiliary machine 10 resonates and the first fixed portion 32 fixed to the flange portion 24 and the flange portion 24 vibrates in the front-rear direction (Z direction) around the Y axis. Since the second fixed portion 34 is not twisted due to the vibration behavior, the vibration behavior of the flange portion 24 and the first fixed portion 32 fixed to the flange portion 24 can be suppressed relatively easily.
  • the coupling portion 36 is arranged along the corner portion 28 composed of the wall surface 22 and the flange portion 24.
  • the end portion of the flange portion 24 in the ⁇ X direction is reinforced by the coupling portion 36, so that when the flange portion 24 vibrates in the front-rear direction around the Y axis, the vibration behavior is easily suppressed. It becomes possible.
  • the second fixed portion 34 extends in the vehicle front direction (+ Z direction) along the auxiliary machine 10, but the present disclosure is not limited to this, and for example, the auxiliary to the cylinder block 20 is supplemented. Depending on the positional relationship of the machine 10, the second fixed portion 34 may extend in both rear directions ( ⁇ Z direction) opposite to the auxiliary machine 10. With this configuration, even if elastic behavior such as fanning the flange portion 24 and the first fixed portion 32 occurs, the elastic behavior can be suppressed by the second fixed portion 34 fixed to the wall surface 22. As a result, it becomes possible to reduce noise.
  • the present disclosure is suitably used for an internal combustion engine provided with an auxiliary support structure that is required to reduce noise.

Abstract

With this internal combustion engine and auxiliary support structure for an internal combustion engine, noise can be reduced. This auxiliary support structure for an internal combustion engine has an auxiliary machine positioned in the periphery of the internal combustion engine, a wall surface, and a flange part extending in a direction orthogonal to the wall surface, the auxiliary support structure comprising a cylinder block in which a piston is accommodated, a first fixed part to which the auxiliary machine is attached and which is fixed to the flange part, a second fixed part fixed to the wall surface, and a connecting part that connects the first fixed part and the second fixed part.

Description

内燃機関の補機支持構造および内燃機関Auxiliary support structure of internal combustion engine and internal combustion engine
　本開示は、内燃機関の補機支持構造および内燃機関に関する。 This disclosure relates to an auxiliary support structure of an internal combustion engine and an internal combustion engine.
　従来、内燃機関の補機支持構造としては、例えば、シリンダブロックと、シリンダブロックの周辺に配置される補機である燃料ポンプと、シリンダブロックの壁面に対し直交する方向に延在し、延在する方向の一端側が壁面に固定され、延在する方向の他端側に燃料ポンプ（補機）が装着されるブラケットとを備える構造が開示されている（例えば、特許文献１を参照）。 Conventionally, as an auxiliary machine support structure of an internal combustion engine, for example, a cylinder block, a fuel pump which is an auxiliary machine arranged around the cylinder block, and a fuel pump extending in a direction orthogonal to the wall surface of the cylinder block are extended and extended. A structure is disclosed in which one end side in the extending direction is fixed to a wall surface and a bracket for mounting a fuel pump (auxiliary machine) is provided on the other end side in the extending direction (see, for example, Patent Document 1).
　また、内燃機関の補機支持構造としては、例えば、シリンダブロックと、燃料噴射ポンプ（補機）と、シリンダブロックの壁面に対し直交する方向に延在し、延在方向一端側が壁面に固定され、延在方向他端側に燃料噴射ポンプが装着されるブラケットとを備える構造が開示されている（例えば、特許文献２を参照）。 Further, as the auxiliary machine support structure of the internal combustion engine, for example, the cylinder block, the fuel injection pump (auxiliary machine), and the fuel injection pump (auxiliary machine) extend in a direction orthogonal to the wall surface of the cylinder block, and one end side in the extending direction is fixed to the wall surface. Disclosed is a structure including a bracket on which a fuel injection pump is mounted on the other end side in the extending direction (see, for example, Patent Document 2).
日本国特開２０１９－１２０１２２号公報Japanese Patent Application Laid-Open No. 2019-120122 日本国特開平１１－３２４６９８号公報Japanese Patent Application Laid-Open No. 11-324698
　ところで、特許文献１および２に記載の技術においては、補機を装着するブラケット（剛性部材）がシリンダブロックの壁面に片持ち形状で固定される振動系を構成している。この振動系は、補機がシリンダブロックに対して相対変位する弾性振動を誘発し、その固有周波数で共振を発生させる。この振動がシリンダブロックに伝達されて放射されることにより、騒音を増大させるという問題がある。ひいては、部品が破損するなどの信頼性や耐久性の問題を引き起こす場合がある。 By the way, in the techniques described in Patent Documents 1 and 2, a vibration system is configured in which a bracket (rigid member) for mounting an auxiliary machine is fixed to the wall surface of a cylinder block in a cantilever shape. This vibration system induces elastic vibration in which the auxiliary machine is displaced relative to the cylinder block, and causes resonance at its natural frequency. There is a problem that noise is increased by transmitting this vibration to the cylinder block and radiating it. As a result, it may cause reliability and durability problems such as damage to parts.
　本開示の目的は、騒音を低減することが可能な内燃機関の補機支持構造および内燃機関を提供することである。 An object of the present disclosure is to provide an auxiliary support structure for an internal combustion engine and an internal combustion engine capable of reducing noise.
　上記の目的を達成するため、本開示における内燃機関の補機支持構造は、
　内燃機関の周辺に配置される補機と、
　壁面と、前記壁面に対し直交する方向に延在するフランジ部とを有し、ピストンが収容されるシリンダブロックと、
　前記補機が装着され、前記フランジ部に固定される第１被固定部と、
　前記壁面に固定される第２被固定部と、
　前記第１被固定部および前記第２被固定部を結合する結合部と、
　を備える。 In order to achieve the above object, the auxiliary support structure of the internal combustion engine in the present disclosure is
Auxiliary equipment placed around the internal combustion engine and
A cylinder block having a wall surface and a flange portion extending in a direction orthogonal to the wall surface and accommodating a piston.
The first fixed portion to which the auxiliary machine is mounted and fixed to the flange portion, and
The second fixed portion fixed to the wall surface and
A joint portion that connects the first fixed portion and the second fixed portion,
To prepare for.
　本開示における内燃機関は、
　上記補機支持構造を備える。 The internal combustion engine in the present disclosure is
The auxiliary machine support structure is provided.
　本開示によれば、騒音を低減することができる。 According to the present disclosure, noise can be reduced.
図１は、本開示の実施の形態にかかる内燃機関の補機支持構造を概略的に示す斜視図である。FIG. 1 is a perspective view schematically showing an auxiliary machine support structure of an internal combustion engine according to an embodiment of the present disclosure. 図２は、比較例に係る補機支持構造を概略的に示す図である。FIG. 2 is a diagram schematically showing an auxiliary machine support structure according to a comparative example. 図３は、比較例に係る補機支持構造における振動挙動の解析結果を示す図である。FIG. 3 is a diagram showing an analysis result of vibration behavior in the auxiliary machine support structure according to the comparative example. 図４は、補機が共振した場合の周波数と騒音レベルとの関係の一例を示す図である。FIG. 4 is a diagram showing an example of the relationship between the frequency and the noise level when the auxiliary machine resonates.
　以下、本開示の実施の形態について、図面を参照しながら説明する。
　図１は、本開示の実施の形態にかかる内燃機関１の補機支持構造１００を概略的に示す斜視図である。図１には、Ｘ軸、Ｙ軸およびＺ軸が描かれている。図１において、左右方向に対して時計回りに所定角度傾く方向を車幅方向又はＸ方向といい、右斜め下方向を車幅方向一側又は「＋Ｘ方向」、左斜め上方向を車幅方向他側又は「－Ｘ方向」という。また、図１において、上下方向を車両高さ方向又はＹ方向といい、上方向を「＋Ｙ方向」、下方向「－Ｙ方向」という。また、図１において、左右方向に対して反時計回りに所定角度傾く方向を車両前後方向、前後方向又はＺ方向といい、左斜め下方向を車両前方向、前方向又は「＋Ｚ方向」、右斜め上方向を車両後方向、後方向又は「－Ｚ方向」という。 Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
FIG. 1 is a perspective view schematically showing an auxiliary machine support structure 100 of the internal combustion engine 1 according to the embodiment of the present disclosure. In FIG. 1, an X-axis, a Y-axis, and a Z-axis are drawn. In FIG. 1, the direction in which a predetermined angle is tilted clockwise with respect to the left-right direction is referred to as the vehicle width direction or the X direction, the diagonally lower right direction is one side of the vehicle width direction or "+ X direction", and the diagonally upper left direction is the vehicle width direction. It is called the other side or "-X direction". Further, in FIG. 1, the vertical direction is referred to as the vehicle height direction or the Y direction, the upward direction is referred to as "+ Y direction", and the downward direction is referred to as "-Y direction". Further, in FIG. 1, the direction tilted by a predetermined angle counterclockwise with respect to the left-right direction is referred to as the vehicle front-rear direction, front-rear direction or Z direction, and the diagonally downward left direction is the vehicle front direction, front direction or "+ Z direction", right. The diagonally upward direction is referred to as the vehicle rear direction, the rear direction, or the "-Z direction".
　本実施の形態にかかる内燃機関１の補機支持構造１００は、補機１０と、シリンダブロック２０と、ブラケット３０とを備える。 The auxiliary machine support structure 100 of the internal combustion engine 1 according to the present embodiment includes the auxiliary machine 10, the cylinder block 20, and the bracket 30.
図１に示す補機１０は、内燃機関１の周辺には配置されている。ここでは、補機１０は、燃料を高圧で燃料噴射弁（不図示）に供給する燃料供給ポンプである。燃料供給ポンプから内燃機関１の本体へ燃料配管１２（図１にその一部を示す）が接続されている。なお、本開示にかかる補機１０は、燃料供給ポンプに限定されず、例えば、エアコンプレッサ、オイルポンプ、ウオーターポンプ、および、発電機などの、内燃機関１から取り出された動力により駆動され、内燃機関１を作動させるための機器でもよい。 The auxiliary machine 10 shown in FIG. 1 is arranged around the internal combustion engine 1. Here, the auxiliary machine 10 is a fuel supply pump that supplies fuel to a fuel injection valve (not shown) at high pressure. A fuel pipe 12 (part of which is shown in FIG. 1) is connected from the fuel supply pump to the main body of the internal combustion engine 1. The auxiliary machine 10 according to the present disclosure is not limited to the fuel supply pump, and is driven by the power taken out from the internal combustion engine 1 such as an air compressor, an oil pump, a water pump, and a generator, and has an internal combustion engine. It may be a device for operating the engine 1.
　図１に示す内燃機関１は、複数のシリンダ（不図示）とシリンダ内に往復移動可能に収容されるピストン（不図示）とを有するシリンダブロック２０を備え、シリンダ内で燃料を燃焼させ、燃焼ガスがピストンを押す力を動力として取り出す。 The internal combustion engine 1 shown in FIG. 1 includes a cylinder block 20 having a plurality of cylinders (not shown) and a piston (not shown) reciprocatingly housed in the cylinders, and burns fuel in the cylinders. The force that the gas pushes the piston is taken out as power.
シリンダブロック２０は、壁面２２と、壁面２２に対し直交する方向に延在するフランジ部２４とを有している。壁面２２は、ＹＺ平面上に広がる壁面である。フランジ部２４は、壁面２２と接続される接続部位から＋Ｘ方向に折れ曲がっている。フランジ部２４は、ＸＹ平面上に広がる装着面２６を有する。フランジ部２４の－Ｘ方向端部は、Ｙ軸に沿うように延在している。 The cylinder block 20 has a wall surface 22 and a flange portion 24 extending in a direction orthogonal to the wall surface 22. The wall surface 22 is a wall surface extending on a YZ plane. The flange portion 24 is bent in the + X direction from the connection portion connected to the wall surface 22. The flange portion 24 has a mounting surface 26 extending on an XY plane. The end portion of the flange portion 24 in the −X direction extends along the Y axis.
　ブラケット３０は、第１被固定部３２と、第２被固定部３４と、結合部３６とを有する。本実施の形態においては、第１被固定部３２、第２被固定部３４および結合部３６は、例えば、アルミニウム、ステンレス鋼、鉄、または、合金などにより一体に成形される。 The bracket 30 has a first fixed portion 32, a second fixed portion 34, and a joint portion 36. In the present embodiment, the first fixed portion 32, the second fixed portion 34, and the joint portion 36 are integrally formed of, for example, aluminum, stainless steel, iron, or an alloy.
第１被固定部３２は、補機１０が装着されている。第１被固定部３２に装着された補機１０は、図１に示すように、車両前後方向（Ｚ方向）を長手方向とする機器である。補機１０の長手方向一端部は、第１被固定部３２に固定されている。補機１０の長手方向他端側は、＋Ｚ方向に延在している。 Auxiliary equipment 10 is attached to the first fixed portion 32. As shown in FIG. 1, the auxiliary machine 10 mounted on the first fixed portion 32 is a device whose longitudinal direction is the vehicle front-rear direction (Z direction). One end of the auxiliary machine 10 in the longitudinal direction is fixed to the first fixed portion 32. The other end side of the auxiliary machine 10 in the longitudinal direction extends in the + Z direction.
第１被固定部３２は、ＸＹ平面上に延在している。つまり、第１被固定部３２は、装着面２６に沿うように延在している。第１被固定部３２は、固定具（例えば、ボルト）によりフランジ部２４に固定されている。第１被固定部３２の－Ｘ方向端部は、Ｙ軸に沿うように延在している。 The first fixed portion 32 extends on the XY plane. That is, the first fixed portion 32 extends along the mounting surface 26. The first fixed portion 32 is fixed to the flange portion 24 by a fixing tool (for example, a bolt). The −X direction end portion of the first fixed portion 32 extends along the Y axis.
　第１被固定部３２は、ＸＹ平面上において互いに異なる複数の方向に延在している。具体的には、第１被固定部３２は、補機１０が装着される位置から車幅方向一側（＋Ｘ方向）に延在する延在部３２１を有している。また、第１被固定部３２は、補機１０が装着される位置から上方向（＋Ｙ方向）に延在する延在部３２２を有している。また、第１被固定部３２は、補機１０が装着される位置から下方向（－Ｙ方向）に延在する延在部３２３を有している。 The first fixed portion 32 extends in a plurality of different directions on the XY plane. Specifically, the first fixed portion 32 has an extending portion 321 extending in one side (+ X direction) in the vehicle width direction from the position where the auxiliary machine 10 is mounted. Further, the first fixed portion 32 has an extending portion 322 extending upward (+ Y direction) from the position where the auxiliary machine 10 is mounted. Further, the first fixed portion 32 has an extending portion 323 extending downward (−Y direction) from the position where the auxiliary machine 10 is mounted.
延在部３２１，３２２，３２３のそれぞれには、下穴３２１ｈ，３２２ｈ，３２３ｈが設けられている。第１被固定部３２は、下穴３２１ｈ，３２２ｈ，３２３ｈのそれぞれに通される固定具によりフランジ部２４に固定されている。つまり、第１被固定部３２が固定具により固定される方向は、図１に実線の矢印で示すように、ＸＹ平面に直交する車両前後方向（Ｚ方向）と同じ方向となる。 Pilot holes 321h, 322h, and 323h are provided in each of the extending portions 321, 322, and 323, respectively. The first fixed portion 32 is fixed to the flange portion 24 by a fixing tool passed through each of the prepared holes 321h, 322h, and 323h. That is, the direction in which the first fixed portion 32 is fixed by the fixing tool is the same as the vehicle front-rear direction (Z direction) orthogonal to the XY plane, as shown by the solid arrow in FIG.
　第２被固定部３４は、壁面２２に沿うように延在している。具体的には、第２被固定部３４は、ＹＺ平面上において、第１被固定部３２の位置から車両前方向（＋Ｚ方向）に延在している。第２被固定部３４の－Ｚ方向端部は、Ｙ軸に沿うように延在している。なお、図１に示すように補機１０の長手方向他端側は、＋Ｚ方向に延在している。このため、第２被固定部３４は、補機１０に沿うように延在している。第２被固定部３４は、固定具（例えば、ボルト）により壁面２２に固定されている。 The second fixed portion 34 extends along the wall surface 22. Specifically, the second fixed portion 34 extends from the position of the first fixed portion 32 in the vehicle front direction (+ Z direction) on the YZ plane. The end portion of the second fixed portion 34 in the −Z direction extends along the Y axis. As shown in FIG. 1, the other end side of the auxiliary machine 10 in the longitudinal direction extends in the + Z direction. Therefore, the second fixed portion 34 extends along the auxiliary machine 10. The second fixed portion 34 is fixed to the wall surface 22 by a fixing tool (for example, a bolt).
　第２被固定部３４は、ＹＺ平面上において互いに異なる４か所からそれぞれの方向に延在している。具体的には、第２被固定部３４は、第１被固定部３２に対し近接する側端部の位置から上方向（＋Ｙ方向）に延在する延在部３４１を有している。また、第２被固定部３４は、第１被固定部３２に近接する側端部の位置から下方向（－Ｙ方向）に延在する延在部３４２を有している。また、第２被固定部３４は、第１被固定部３２に離間する側端部の位置から上方向（＋Ｙ方向）に延在する延在部３４３を有している。また、第２被固定部３４は、第１被固定部３２に離間する側端部の位置から下方向（－Ｙ方向）に延在する延在部３４４を有している。 The second fixed portion 34 extends in each direction from four different locations on the YZ plane. Specifically, the second fixed portion 34 has an extending portion 341 extending upward (+ Y direction) from the position of the side end portion close to the first fixed portion 32. Further, the second fixed portion 34 has an extending portion 342 extending downward (−Y direction) from the position of the side end portion close to the first fixed portion 32. Further, the second fixed portion 34 has an extending portion 343 extending upward (+ Y direction) from the position of the side end portion separated from the first fixed portion 32. Further, the second fixed portion 34 has an extending portion 344 extending downward (−Y direction) from the position of the side end portion separated from the first fixed portion 32.
延在部３４１，３４２，３４３，３４４のそれぞれには、下穴３４１ｈ，３４２ｈ，３４３ｈ、３４４ｈが設けられている。第２被固定部３４は、下穴３４１ｈ，３４２ｈ，３４３ｈ、３４４ｈのそれぞれに通される固定具により壁面２２に固定されている。つまり、第２被固定部３４が固定具により固定される方向は、図１に破線の矢印で示すように、ＹＺ平面に直交する車幅方向（Ｘ方向）と同じ方向となる。 Pilot holes 341h, 342h, 343h, and 344h are provided in each of the extending portions 341, 342, 343, and 344. The second fixed portion 34 is fixed to the wall surface 22 by a fixing tool passed through each of the prepared holes 341h, 342h, 343h, and 344h. That is, the direction in which the second fixed portion 34 is fixed by the fixing tool is the same as the vehicle width direction (X direction) orthogonal to the YZ plane, as shown by the broken line arrow in FIG.
　結合部３６は、第１被固定部３２の－Ｘ方向端部と第２被固定部３４の－Ｚ方向端部とを結合する。前述するように、第１被固定部３２の－Ｘ方向端部はＹ軸に沿うように延在している。また、第２被固定部３４の－Ｚ方向端部はＹ軸に沿うように延在している。－Ｘ方向端部と－Ｚ方向端部とを結合する結合部３６は、Ｙ軸に沿って延在している。結合部３６は、壁面２２とフランジ部２４とにより構成される隅部２８に沿うように配置されている。 The connecting portion 36 connects the −X direction end portion of the first fixed portion 32 and the −Z direction end portion of the second fixed portion 34. As described above, the end portion of the first fixed portion 32 in the −X direction extends along the Y axis. Further, the end portion of the second fixed portion 34 in the −Z direction extends along the Y axis. The joint portion 36 that connects the end portion in the −X direction and the end portion in the −Z direction extends along the Y axis. The joint portion 36 is arranged along the corner portion 28 composed of the wall surface portion 22 and the flange portion 24.
　次に、内燃機関の補機支持構造１００において、補機１０が固有周波数で共振に起因した場合について説明する。 Next, in the auxiliary machine support structure 100 of the internal combustion engine, a case where the auxiliary machine 10 is caused by resonance at a natural frequency will be described.
　補機１０が共振した場合、前述するように、フランジ部２４の－Ｘ方向端部がＹ軸に沿うように延在し、第１被固定部３２の－Ｘ方向端部がＹ軸に沿うように延在しているため、フランジ部２４及びフランジ部２４に固定される第１被固定部３２を、Ｙ軸回りに前後方向（Ｚ方向）へ扇ぐような振動挙動が生じる。しかし、シリンダブロック２０側に固定点を設けることにより、つまり、ブラケット３０の第２被固定部３４が壁面２２に固定されることにより、補機１０とフランジ部２４とが一体となるため、また、壁面２２とフランジ部２４とで構成される隅部２８が強固に固定されるため、振動挙動の振幅を低減する。この振動がシリンダブロック２０に伝達されて放射される騒音を低減することができる。 When the auxiliary machine 10 resonates, as described above, the −X direction end portion of the flange portion 24 extends along the Y axis, and the −X direction end portion of the first fixed portion 32 extends along the Y axis. Since it extends as such, the vibration behavior of fanning the flange portion 24 and the first fixed portion 32 fixed to the flange portion 24 in the front-rear direction (Z direction) around the Y axis occurs. However, by providing a fixing point on the cylinder block 20 side, that is, by fixing the second fixed portion 34 of the bracket 30 to the wall surface 22, the auxiliary machine 10 and the flange portion 24 are integrated. Since the corner portion 28 composed of the wall surface 22 and the flange portion 24 is firmly fixed, the amplitude of the vibration behavior is reduced. This vibration is transmitted to the cylinder block 20 and radiated noise can be reduced.
　また、振動挙動によって第２被固定部３４を壁面２２から引き剥す方向（Ｘ方向）の力が生じても、第２被固定部３４は固定具（ボルト）により壁面２２に車幅方向（Ｘ方向）と同じ方向で固定されているため、固定具に伸縮変形が生じることで、振動挙動のエネルギーが吸収される。この点からも、振動挙動の振幅を低減することで、騒音を低減することができる。 Further, even if a force is generated in the direction (X direction) of peeling the second fixed portion 34 from the wall surface 22 due to the vibration behavior, the second fixed portion 34 is placed on the wall surface 22 in the vehicle width direction (X) by the fixing tool (bolt). Since it is fixed in the same direction as the direction), the energy of the vibration behavior is absorbed by the expansion and contraction deformation of the fixture. From this point as well, noise can be reduced by reducing the amplitude of the vibration behavior.
　さらに、振動挙動によって第２被固定部３４を壁面２２に対しＹ方向及び／またはＺ方向に移動するような力が生じた場合、前述するように第２被固定部３４は固定具（ボルト）により壁面２２に車幅方向（Ｘ方向）と同じ方向で固定されているため、振動挙動によって固定具にせん断変形が生じることで、振動挙動のエネルギーが吸収される。また、第２被固定部３４が壁面２２に沿うように延在しているため、第２被固定部３４と壁面２２との間に生じる摩擦抵抗力によっても振動挙動のエネルギーが吸収される。これらの点からも、振動挙動の振幅を低減することで、騒音を低減することができる。 Further, when a force that causes the second fixed portion 34 to move in the Y direction and / or the Z direction with respect to the wall surface 22 is generated due to the vibration behavior, the second fixed portion 34 is a fixture (bolt) as described above. Because it is fixed to the wall surface 22 in the same direction as the vehicle width direction (X direction), the fixture undergoes shear deformation due to the vibration behavior, so that the energy of the vibration behavior is absorbed. Further, since the second fixed portion 34 extends along the wall surface 22, the energy of the vibration behavior is also absorbed by the frictional resistance force generated between the second fixed portion 34 and the wall surface 22. From these points as well, noise can be reduced by reducing the amplitude of vibration behavior.
　以上のように、補機１０が共振した場合であっても、第２被固定部３４が固定具により壁面２２に固定されることによって、また、結合部３６が第１被固定部３２と第２被固定部３４とを結合することによって、また、第２被固定部３４が壁面２２に沿うように延在することによって、振動挙動の振幅を低減することができる。その結果、騒音を低減することが可能となる。 As described above, even when the auxiliary machine 10 resonates, the second fixed portion 34 is fixed to the wall surface 22 by the fixing tool, and the connecting portion 36 is the first fixed portion 32 and the first fixed portion 32. The amplitude of the vibration behavior can be reduced by connecting the two fixed portions 34 and by extending the second fixed portion 34 along the wall surface 22. As a result, it becomes possible to reduce noise.
　図２は、比較例に係る補機支持構造２００を概略的に示す図である。図２に示すように、比較例に係る補機支持構造２００は、第２被固定部３４、第２被固定部３４を壁面２２に固定する固定具、および、第１被固定部３２と第２被固定部３４とを結合する結合部３６等のフランジ部２４を補強するための部品がない点で、それらの補強部品がある、本実施の形態に係る補機支持構造１００と異なる。 FIG. 2 is a diagram schematically showing the auxiliary machine support structure 200 according to the comparative example. As shown in FIG. 2, in the auxiliary machine support structure 200 according to the comparative example, the second fixed portion 34, the fixing tool for fixing the second fixed portion 34 to the wall surface 22, and the first fixed portion 32 and the first fixed portion 32. 2 It differs from the auxiliary machine support structure 100 according to the present embodiment in that there are no parts for reinforcing the flange portion 24 such as the joint portion 36 that connects the fixed portion 34 with the reinforcing parts.
　図３は、比較例に係る補機支持構造２００における振動挙動の解析結果を示す図である。図３に所定数の要素をグループ化することにより定義された補機支持構造２００を示す。図３に、補機１０（燃料供給ポンプ）の先端部を接点Ｐ１で示し、フランジ部２４の＋Ｘ方向端部のＹ方向両端部を接点Ｐ２，Ｐ３で示し、フランジ部２４の壁面２２との接続部位のＹ方向両端部を接点Ｐ４，Ｐ５で示す。図３に破線の矢印で示すように、接点Ｐ１がＸ方向に振動した場合、フランジ部２４には、図３に実線の矢印で示すように、接点Ｐ２，Ｐ３を前後方向（Ｚ方向）に扇ぐような振動挙動が発生する。 FIG. 3 is a diagram showing an analysis result of vibration behavior in the auxiliary machine support structure 200 according to the comparative example. FIG. 3 shows an auxiliary machine support structure 200 defined by grouping a predetermined number of elements. In FIG. 3, the tip of the auxiliary machine 10 (fuel supply pump) is shown by the contact P1, and both ends of the flange portion 24 in the + X direction are shown by the contacts P2 and P3 with the wall surface 22 of the flange portion 24. Both ends of the connection portion in the Y direction are indicated by contacts P4 and P5. As shown by the dashed arrow in FIG. 3, when the contact P1 vibrates in the X direction, the flange portion 24 has the contacts P2 and P3 in the front-back direction (Z direction) as shown by the solid arrow in FIG. A fan-like vibration behavior occurs.
　図４は、補機１０が共振した場合の周波数と騒音レベルとの関係の一例を示す図である。図４の横軸に周波数［Ｈｚ］を示し、縦軸に騒音レベル［ｄＢＡ］を示す。また、図４に、補強あり（本実施の形態に係る補機支持構造１００の場合）の騒音レベルを点線で示し、補強なし（比較例に係る補機支持構造２００の場合）の騒音レベルを実線で示す。 FIG. 4 is a diagram showing an example of the relationship between the frequency and the noise level when the auxiliary machine 10 resonates. The horizontal axis of FIG. 4 indicates the frequency [Hz], and the vertical axis indicates the noise level [dBA]. Further, FIG. 4 shows the noise level with reinforcement (in the case of the auxiliary machine support structure 100 according to the present embodiment) by a dotted line, and the noise level without reinforcement (in the case of the auxiliary machine support structure 200 according to the comparative example). Shown by a solid line.
　図４に示すように、補機１０が周波数５００［Ｈｚ］付近で共振した場合、本実施の形態に係る補機支持構造１００が比較例に係る補機支持構造２００よりも２［ｄＢＡ］だけ低減することを確認することができる。 As shown in FIG. 4, when the auxiliary machine 10 resonates in the vicinity of the frequency 500 [Hz], the auxiliary machine support structure 100 according to the present embodiment is only 2 [dBA] more than the auxiliary machine support structure 200 according to the comparative example. It can be confirmed that it is reduced.
　上記開示の実施の形態に係る内燃機関の補機支持構造１００は、内燃機関１の周辺に配置される補機１０と、壁面２２と、壁面２２に対し直交する方向に延在するフランジ部２４とを有し、ピストンが収容されるシリンダブロック２０と、補機１０が装着され、フランジ部２４に固定される第１被固定部３２と、壁面２２に固定される第２被固定部３４と、第１被固定部３２および第２被固定部３４を結合する結合部３６と、備える。 The auxiliary support structure 100 of the internal combustion engine according to the embodiment of the above disclosure includes an auxiliary machine 10 arranged around the internal combustion engine 1, a wall surface 22, and a flange portion 24 extending in a direction orthogonal to the wall surface 22. A cylinder block 20 in which a piston is housed, a first fixed portion 32 to which an auxiliary machine 10 is mounted and fixed to a flange portion 24, and a second fixed portion 34 to be fixed to a wall surface 22. , A connecting portion 36 for connecting the first fixed portion 32 and the second fixed portion 34.
　上記構成により、補機１０が共振した場合、ブラケット３０により、補機１０とフランジ部２４とが一体となるため、フランジ部２４の振動挙動の振幅を低減することができる。その結果、騒音を低減することが可能となる。ひいては、燃料供給ポンプである補機１０から内燃機関１の本体へ接続される燃料配管１２の耐久性を向上することが可能となる。 With the above configuration, when the auxiliary machine 10 resonates, the bracket 30 integrates the auxiliary machine 10 with the flange portion 24, so that the amplitude of the vibration behavior of the flange portion 24 can be reduced. As a result, it becomes possible to reduce noise. As a result, it is possible to improve the durability of the fuel pipe 12 connected from the auxiliary machine 10 which is a fuel supply pump to the main body of the internal combustion engine 1.
　また、上記開示の実施の形態に係る内燃機関の補機支持構造１００は、第１被固定部３２は、フランジ部２４に沿うように延在する。第１被固定部３２を装着面２６（ＸＹ平面）に対し移動するような振動挙動が生じた場合、第１被固定部３２とフランジ部２４との間に生じる摩擦抵抗力により振動挙動のエネルギーが吸収される。この点からも、振動挙動の振幅を低減することで、騒音を低減することができる。 Further, in the auxiliary machine support structure 100 of the internal combustion engine according to the embodiment of the above disclosure, the first fixed portion 32 extends along the flange portion 24. When vibration behavior occurs such that the first fixed portion 32 moves with respect to the mounting surface 26 (XY plane), the energy of the vibration behavior is generated by the frictional resistance force generated between the first fixed portion 32 and the flange portion 24. Is absorbed. From this point as well, noise can be reduced by reducing the amplitude of the vibration behavior.
　また、上記開示の実施の形態に係る内燃機関の補機支持構造１００は、第２被固定部３４は、壁面２２に沿うように延在する。第２被固定部３４を壁面２２（ＹＺ平面）に対し移動するような振動挙動が生じた場合、第２被固定部３４と壁面２２との間に生じる摩擦抵抗力により振動挙動のエネルギーが吸収される。この点からも、振動挙動の振幅を低減することで、騒音を低減することができる。 Further, in the auxiliary machine support structure 100 of the internal combustion engine according to the embodiment of the above disclosure, the second fixed portion 34 extends along the wall surface 22. When vibration behavior occurs such that the second fixed portion 34 moves with respect to the wall surface 22 (YZ plane), the energy of the vibration behavior is absorbed by the frictional resistance force generated between the second fixed portion 34 and the wall surface 22. Will be done. From this point as well, noise can be reduced by reducing the amplitude of the vibration behavior.
また、第２被固定部３４は、補機１０に沿うように、＋Ｚ方向に延在する。これにより、補機１０が共振し、フランジ部２４及びフランジ部２４に固定される第１被固定部３２を、Ｙ軸回りに前後方向（Ｚ方向）へ扇ぐような振動挙動が生じた場合、振動挙動によって、第２被固定部３４にねじれが生じないため、フランジ部２４およびフランジ部２４に固定される第１被固定部３２の振動挙動を比較的容易に抑えることが可能となる。 Further, the second fixed portion 34 extends in the + Z direction along the auxiliary machine 10. As a result, when the auxiliary machine 10 resonates and the first fixed portion 32 fixed to the flange portion 24 and the flange portion 24 vibrates in the front-rear direction (Z direction) around the Y axis. Since the second fixed portion 34 is not twisted due to the vibration behavior, the vibration behavior of the flange portion 24 and the first fixed portion 32 fixed to the flange portion 24 can be suppressed relatively easily.
　また、上記開示の実施の形態に係る内燃機関の補機支持構造１００では、結合部３６は、壁面２２とフランジ部２４とにより構成される隅部２８に沿うように配置される。これにより、結合部３６によりフランジ部２４の－Ｘ方向端部が補強されるため、フランジ部２４がＹ軸回りに前後方向へ扇ぐような振動挙動が生じた場合、その振動挙動を容易に抑えることが可能となる。 Further, in the auxiliary machine support structure 100 of the internal combustion engine according to the embodiment of the above disclosure, the coupling portion 36 is arranged along the corner portion 28 composed of the wall surface 22 and the flange portion 24. As a result, the end portion of the flange portion 24 in the −X direction is reinforced by the coupling portion 36, so that when the flange portion 24 vibrates in the front-rear direction around the Y axis, the vibration behavior is easily suppressed. It becomes possible.
　上記実施の形態においては、第２被固定部３４は、補機１０に沿うように車両前方向（＋Ｚ方向）に延在したが、本開示はこれに限らず、例えば、シリンダブロック２０に対する補機１０の位置関係によっては、第２被固定部３４は、補機１０とは反対側である両後方向（－Ｚ方向）に延在してもよい。この構成により、フランジ部２４および第１被固定部３２を扇ぐような弾性挙動が生じても、壁面２２に固定される第２被固定部３４によって、弾性挙動を抑えることができる。その結果、騒音を低減することが可能となる。 In the above embodiment, the second fixed portion 34 extends in the vehicle front direction (+ Z direction) along the auxiliary machine 10, but the present disclosure is not limited to this, and for example, the auxiliary to the cylinder block 20 is supplemented. Depending on the positional relationship of the machine 10, the second fixed portion 34 may extend in both rear directions (−Z direction) opposite to the auxiliary machine 10. With this configuration, even if elastic behavior such as fanning the flange portion 24 and the first fixed portion 32 occurs, the elastic behavior can be suppressed by the second fixed portion 34 fixed to the wall surface 22. As a result, it becomes possible to reduce noise.
　その他、上記実施の形態は、何れも本開示の実施をするにあたっての具体化の一例を示したものに過ぎず、これらによって本開示の技術的範囲が限定的に解釈されてはならないものである。すなわち、本開示はその要旨、またはその主要な特徴から逸脱することなく、様々な形で実施することができる。 In addition, the above embodiments are merely examples of the embodiment of the present disclosure, and the technical scope of the present disclosure should not be construed in a limited manner by these. .. That is, the present disclosure can be implemented in various forms without departing from its gist or its main characteristics.
　本出願は、２０２０年７月１６日付けで出願された日本国特許出願（特願２０２０－１２２１６６）に基づくものであり、その内容はここに参照として取り込まれる。 This application is based on a Japanese patent application (Japanese Patent Application No. 2020-12216) filed on July 16, 2020, the contents of which are incorporated herein by reference.
　本開示は、騒音を低減することが要求される補機支持構造を備えた内燃機関に好適に利用される。 The present disclosure is suitably used for an internal combustion engine provided with an auxiliary support structure that is required to reduce noise.
　１　内燃機関
　１０　補機（燃料供給ポンプ）
　１２　燃料配管
　２０　シリンダブロック
　２２　壁面
　２４　フランジ部
　２６　装着面
　２８　隅部
　３０　ブラケット
　３２　第１被固定部
　３４　第２被固定部
　３６　結合部
　１００，２００　補機支持構造
　３２１，３２２，３２３，３４１，３４２，３４３，３４４　延在部
　３２１ｈ，３２２ｈ，３２３ｈ，３４１ｈ，３４２ｈ，３４３ｈ，３４４ｈ　下穴 1 Internal combustion engine 10 Auxiliary equipment (fuel supply pump)
12 Fuel piping 20 Cylinder block 22 Wall surface 24 Flange part 26 Mounting surface 28 Corner part 30 Bracket 32 1st fixed part 34 2nd fixed part 36 Coupling part 100,200 Auxiliary machine support structure 321,322,323,341,342 , 343, 344 Extended part 321h, 322h, 323h, 341h, 342h, 343h, 344h Pilot hole

Claims (7)

  1. 　内燃機関の周辺に配置される補機と、
    　壁面と、前記壁面に対し直交する方向に延在するフランジ部とを有し、ピストンが収容されるシリンダブロックと、
    　前記補機が装着され、前記フランジ部に固定される第１被固定部と、
    　前記壁面に固定される第２被固定部と、
    　前記第１被固定部および前記第２被固定部を結合する結合部と、
    　を備える、内燃機関の補機支持構造。     Auxiliary equipment placed around the internal combustion engine and
    A cylinder block having a wall surface and a flange portion extending in a direction orthogonal to the wall surface and accommodating a piston.
    The first fixed portion to which the auxiliary machine is mounted and fixed to the flange portion, and
    The second fixed portion fixed to the wall surface and
    A joint portion that connects the first fixed portion and the second fixed portion,
    Auxiliary support structure for internal combustion engine.
  2. 　前記第１被固定部は、前記フランジ部に沿うように延在する、
    　請求項１に記載の内燃機関の補機支持構造。     The first fixed portion extends along the flange portion.
    The auxiliary support structure for an internal combustion engine according to claim 1.
  3. 　前記第２被固定部は、前記壁面に沿うように延在する、
    　請求項１に記載の内燃機関の補機支持構造。     The second fixed portion extends along the wall surface.
    The auxiliary support structure for an internal combustion engine according to claim 1.
  4. 　前記第２被固定部は、前記補機に沿うように延在する、
    　請求項１に記載の内燃機関の補機支持構造。     The second fixed portion extends along the auxiliary machine.
    The auxiliary support structure for an internal combustion engine according to claim 1.
  5. 　前記結合部は、前記壁面と前記フランジ部とにより構成される隅部に沿うように配置される、
    　請求項１に記載の内燃機関の補機支持構造。     The joint portion is arranged along a corner portion formed by the wall surface portion and the flange portion.
    The auxiliary support structure for an internal combustion engine according to claim 1.
  6. 　前記補機は、燃料配管が接続される燃料供給ポンプを含む、
    　請求項１に記載の内燃機関の補機支持構造。     The auxiliary equipment includes a fuel supply pump to which a fuel pipe is connected.
    The auxiliary support structure for an internal combustion engine according to claim 1.
  7. 　請求項１に記載の内燃機関の補機支持構造を備える、内燃機関。 An internal combustion engine having an auxiliary support structure for the internal combustion engine according to claim 1.
PCT/JP2021/026454 2020-07-16 2021-07-14 Auxiliary support structure for internal combustion engine, and internal combustion engine WO2022014637A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11200949A (en) * 1998-01-12 1999-07-27 Isuzu Motors Ltd Cylinder block structure
JP2001193474A (en) * 2000-01-11 2001-07-17 Robert Bosch Gmbh Auxiliary machinery mounting structure for engine
JP2018193964A (en) * 2017-05-20 2018-12-06 いすゞ自動車株式会社 Reinforcing structure of power plant

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0719138A (en) * 1993-07-02 1995-01-20 Nippondenso Co Ltd Fixture for in-line injection pump
JP3430659B2 (en) * 1994-09-19 2003-07-28 日産自動車株式会社 Diesel engine vacuum pump mounting structure
JP6324921B2 (en) * 2015-04-03 2018-05-16 株式会社日立建機ティエラ Construction machinery

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11200949A (en) * 1998-01-12 1999-07-27 Isuzu Motors Ltd Cylinder block structure
JP2001193474A (en) * 2000-01-11 2001-07-17 Robert Bosch Gmbh Auxiliary machinery mounting structure for engine
JP2018193964A (en) * 2017-05-20 2018-12-06 いすゞ自動車株式会社 Reinforcing structure of power plant

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