CN115917127A - Auxiliary engine support structure of internal combustion engine and internal combustion engine - Google Patents
Auxiliary engine support structure of internal combustion engine and internal combustion engine Download PDFInfo
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- CN115917127A CN115917127A CN202180042687.3A CN202180042687A CN115917127A CN 115917127 A CN115917127 A CN 115917127A CN 202180042687 A CN202180042687 A CN 202180042687A CN 115917127 A CN115917127 A CN 115917127A
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- fixed
- internal combustion
- combustion engine
- auxiliary
- support structure
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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
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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
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/11—Thermal or acoustic insulation
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Vibration Prevention Devices (AREA)
Abstract
An auxiliary machine support structure of an internal combustion engine and the internal combustion engine can reduce noise. An auxiliary engine support structure for an internal combustion engine is provided with: an auxiliary machine disposed around the internal combustion engine; a cylinder block having a wall surface and a flange portion extending in a direction orthogonal to the wall surface, and accommodating a piston; a first fixed part to which the auxiliary device is attached and which is fixed to the flange part; a second fixed part fixed to the wall surface; and a coupling portion that couples the first fixed portion to be fixed and the second fixed portion to be fixed.
Description
Technical Field
The present invention relates to an auxiliary machine support structure of an internal combustion engine and an internal combustion engine.
Background
Conventionally, as an auxiliary machine support structure for an internal combustion engine, there is disclosed a structure including, for example: a cylinder block; a fuel pump as an auxiliary machine disposed around the cylinder block; and a bracket that extends in a direction orthogonal to the wall surface of the cylinder block, has one end side in the extending direction fixed to the wall surface, and has a fuel pump (auxiliary) attached to the other end side in the extending direction (see, for example, patent document 1).
As an auxiliary machine support structure for an internal combustion engine, for example, a structure including: a cylinder block; a fuel injection pump (auxiliary machine); and a structure that extends in a direction orthogonal to the wall surface of the cylinder block, and has one end side in the extending direction fixed to the wall surface and the other end side in the extending direction to which a bracket of the fuel injection pump is attached (for example, see patent document 2).
Documents of the prior art
Patent literature
Patent document 1: japanese patent laid-open publication No. 2019-120122.
Patent document 1: japanese patent laid-open No. 11-324698.
Disclosure of Invention
Problems to be solved by the invention
However, in the techniques described in patent documents 1 and 2, a bracket (rigid member) to which an auxiliary machine is attached constitutes a vibration system fixed to a wall surface of a cylinder block in a cantilever shape. This vibration system induces elastic vibration to displace the auxiliary unit relative to the cylinder block, and generates resonance at its natural frequency. There is a problem in that the vibration is transmitted to the cylinder block and radiated, thereby increasing noise. And even sometimes cause problems in reliability and durability, such as breakage of parts, etc.
The invention aims to provide an auxiliary engine supporting structure of an internal combustion engine and the internal combustion engine, which can reduce noise.
Means for solving the problems
In order to achieve the above object, an auxiliary machine support structure for an internal combustion engine according to the present invention includes:
an auxiliary machine disposed around the internal combustion engine;
a cylinder block having a wall surface and a flange portion extending in a direction orthogonal to the wall surface, and accommodating a piston;
a first fixed part to which the auxiliary unit is attached and which is fixed to the flange part;
a second fixed portion fixed to the wall surface; and
and a coupling portion that couples the first fixed portion to be fixed and the second fixed portion to be fixed.
The internal combustion engine of the present invention includes the auxiliary machine support structure.
Effects of the invention
According to the present invention, noise can be reduced.
Drawings
Fig. 1 is a perspective view schematically showing an auxiliary support structure of an internal combustion engine according to an embodiment of the present invention.
Fig. 2 is a diagram schematically showing an auxiliary machine support structure of a comparative example.
Fig. 3 is a diagram showing the analysis result of the vibration behavior in the auxiliary machine support structure of the comparative example.
Fig. 4 is a diagram showing an example of a relationship between a frequency and a noise level at the time of resonance of the auxiliary machinery.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Fig. 1 is a perspective view schematically showing an auxiliary support structure 100 of an internal combustion engine 1 according to an embodiment of the present invention. The X, Y and Z axes are depicted in fig. 1. In fig. 1, a direction inclined at a predetermined angle clockwise with respect to the left-right direction is referred to as a vehicle width direction or an X direction, a right-obliquely downward direction is referred to as a vehicle width direction side or a "+ X direction", and a left-obliquely upward direction is referred to as a vehicle width direction side or a "-X direction". In fig. 1, the up-down direction is referred to as the vehicle height direction or Y direction, the up direction is referred to as "+ Y direction", and the down direction is referred to as "-Y direction". In fig. 1, a direction inclined at a predetermined angle counterclockwise with respect to the left-right direction is referred to as a vehicle front-rear direction, a front-rear direction, or a Z direction, a left obliquely downward direction is referred to as a vehicle front, or "+ Z direction", and a right obliquely upward direction is referred to as a vehicle rear, or "-Z direction.
The auxiliary engine support structure 100 of the internal combustion engine 1 of the present embodiment includes an auxiliary engine 10, a cylinder block 20, and a bracket 30.
The auxiliary machine 10 shown in fig. 1 is disposed around the internal combustion engine 1. Here, the auxiliary device 10 is a fuel supply pump that supplies fuel at high pressure to a fuel injection valve (not shown). The fuel pipe 12 (a 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 of the present invention is not limited to the fuel supply pump, and may be a device that is driven by power taken out of the internal combustion engine 1 and operates the internal combustion engine 1, such as an air compressor, an oil pump, a water pump, and a generator.
An internal combustion engine 1 shown in fig. 1 includes a cylinder block 20, and the cylinder block 20 includes a plurality of cylinders (not shown) and pistons (not shown) housed in the cylinders so as to be capable of reciprocating, and the internal combustion engine 1 burns fuel in the cylinders and takes out, as power, a force that presses the piston with the combustion gas.
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 in the YZ plane. The flange portion 24 is bent in the + X direction from a connection portion with the wall surface 22. The flange portion 24 has a mounting surface 26 spreading on the XY plane. the-X direction end of the flange portion 24 extends along the Y axis.
The holder 30 has a first fixed part 32, a second fixed part 34, and a coupling part 36. In the present embodiment, the first fixed part to be fixed 32, the second fixed part to be fixed 34, and the joint 36 are integrally formed of, for example, aluminum, stainless steel, iron, an alloy, or the like.
The auxiliary 10 is mounted on the first fixed portion 32. As shown in fig. 1, the auxiliary device 10 attached to the first fixed part 32 is a device whose longitudinal direction is the vehicle front-rear direction (Z direction). One end portion in the longitudinal direction of the auxiliary unit 10 is fixed to the first fixed portion 32. The other end side in the longitudinal direction of the auxiliary unit 10 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 member (e.g., a bolt). the-X direction end 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 part 32 has an extending part 321 extending from the position where the auxiliary 10 is mounted to one side in the vehicle width direction (+ X direction). In addition, the first fixed part 32 has an extending part 322 extending in the upper direction (+ Y direction) from the position where the auxiliary 10 is mounted. The first fixed part 32 has an extending part 323 extending downward (-Y direction) from the position where the auxiliary unit 10 is mounted.
The extending portions 321, 322, 323 are provided with lower holes 321h, 322h, 323h, respectively. The first fixed portion 32 is fixed to the flange portion 24 by fixing members inserted through the lower holes 321h, 322h, 323h, respectively. That is, as shown by the solid arrow in fig. 1, the direction in which the first fixed part 32 is fixed by the fixing member is the same direction as the vehicle front-rear direction (Z direction) orthogonal to the XY plane.
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 to the vehicle front (+ Z direction) on the YZ plane. the-Z direction end of the second fixed portion 34 extends along the Y axis. As shown in fig. 1, the other end side in the longitudinal direction of the auxiliary unit 10 extends in the + Z direction. Therefore, the second fixed portion 34 extends along the auxiliary unit 10. The second fixed portion 34 is fixed to the wall surface 22 by a fixing member (e.g., a bolt).
The second fixed portions 34 extend in respective directions from mutually different 4 positions on the YZ plane. Specifically, the second fixed part 34 has an extending portion 341 extending in the upward direction (+ Y direction) from a position of the side portion close to the first fixed part 32. The second fixed part 34 has an extending part 342 extending downward (-Y direction) from a position on the side near the first fixed part 32. The second fixed part 34 has an extending part 343 extending in the upward direction (+ Y direction) from a position away from the side edge part of the first fixed part 32. In addition, the second fixed part 34 has an extending part 344 extending downward (-Y direction) from a position away from the side part of the first fixed part 32.
The coupling portion 36 couples the-X-direction end of the first fixed portion 32 and the-Z-direction end of the second fixed portion 34. As described above, the-X direction end of the first fixed portion 32 extends along the Y axis. Further, the-Z direction end of the second fixed portion 34 extends along the Y axis. The joining portion 36 joining the-X direction end portion and the-Z direction end portion extends along the Y axis. The joint 36 is disposed along the corner 28 formed by the wall surface 22 and the flange 24.
Next, a case where the auxiliary machine 10 resonates due to the natural frequency in the auxiliary machine support structure 100 of the internal combustion engine will be described.
As described above, since the-X direction end of the flange portion 24 extends along the Y axis and the-X direction end of the first fixed portion 32 extends along the Y axis, when the auxiliary unit 10 resonates, a vibration behavior is generated in which the flange portion 24 and the first fixed portion 32 fixed to the flange portion 24 oscillate in the front-rear direction (Z direction) around the Y axis. 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 unit 10 is integrated with the flange portion 24, and the corner portion 28 formed by the wall surface 22 and the flange portion 24 is firmly fixed, so that the amplitude of the vibration behavior is reduced. The noise generated when the vibration is transmitted to the cylinder block 20 and radiated can be reduced.
Even if a force in the direction (X direction) pulling the second fixed portion 34 away from the wall surface 22 is generated by the vibration behavior, the second fixed portion 34 is fixed to the wall surface 22 by a fastener (bolt) in the same direction as the vehicle width direction (X direction), and therefore, the fastener is deformed in an expansion and contraction manner, and the energy of the vibration behavior is absorbed. Similarly, the amplitude of the vibration behavior can be reduced to reduce noise.
Further, when a force that moves the second fixed part 34 in the Y direction and/or the Z direction with respect to the wall surface 22 is generated by the vibration behavior, as described above, since the second fixed part 34 is fixed to the wall surface 22 by the fixing (bolt) in the same direction as the vehicle width direction (X direction), the vibration behavior causes shear deformation in the fixing, and thus 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 generated between the second fixed portion 34 and the wall surface 22. According to these aspects as well, the noise can be reduced by reducing the amplitude of the vibration behavior.
As described above, even when the auxiliary unit 10 resonates, the amplitude of the vibration behavior can be reduced by fixing the second fixed part 34 to the wall surface 22 with the fixture, by joining the first fixed part 32 and the second fixed part 34 together with the joint 36, and by extending the second fixed part 34 along the wall surface 22. As a result, noise can be reduced.
Fig. 2 is a diagram schematically showing an auxiliary machine support structure 200 of a comparative example. As shown in fig. 2, the auxiliary support structure 200 of the comparative example is different from the auxiliary support structure 100 of the present embodiment having these reinforcing members in that it does not include the second fixed part 34, the fixing member for fixing the second fixed part 34 to the wall surface 22, and the coupling part 36 for coupling the first fixed part 32 and the second fixed part 34 together, and the like for reinforcing the flange part 24.
Fig. 3 is a diagram showing the analysis result of the vibration behavior in the auxiliary machine support structure 200 of the comparative example. A subsidiary support structure 200 defined by grouping a predetermined number of elements is shown in fig. 3. In fig. 3, a contact P1 indicates a tip end portion of the auxiliary device 10 (fuel supply pump), contacts P2 and P3 indicate both Y-direction end portions of the + X-direction end portion of the flange portion 24, and contacts P4 and P5 indicate both Y-direction end portions of a connection portion of the flange portion 24 and the wall surface 22. When the contact P1 vibrates in the X direction as indicated by the broken line arrow in fig. 3, a vibration behavior that swings the contacts P2 and P3 in the front-rear direction (Z direction) occurs in the flange portion 24 as indicated by the solid line arrow in fig. 3.
Fig. 4 is a diagram showing an example of a relationship between a frequency and a noise level when the auxiliary unit 10 resonates. In fig. 4, the horizontal axis represents frequency [ Hz ] and the vertical axis represents noise level [ dBA ]. In fig. 4, the noise level when the reinforcing member is present (in the case of the auxiliary support structure 100 of the present embodiment) is indicated by a broken line, and the noise level when the reinforcing member is absent (in the case of the auxiliary support structure 200 of the comparative example) is indicated by a solid line.
As shown in fig. 4, in the case where the auxiliary machine 10 resonates at a frequency of about 500 2 hz, it can be confirmed that the auxiliary machine support structure 100 of the present embodiment is reduced by 2 dba compared with the auxiliary machine support structure 200 of the comparative example.
The auxiliary engine support structure 100 of the internal combustion engine according to the embodiment disclosed above includes: an auxiliary machine 10 disposed around the internal combustion engine 1; a cylinder block 20 having a wall surface 22 and a flange portion 24 extending in a direction orthogonal to the wall surface 22 and accommodating a piston; a first fixed part 32 to which the auxiliary 10 is attached and which is fixed to the flange 24; a second fixed portion 34 fixed to the wall surface 22; and a coupling portion 36 that couples the first fixed portion to be fixed 32 and the second fixed portion to be fixed 34 together.
According to the above configuration, when the auxiliary 10 resonates, the auxiliary 10 and the flange portion 24 are integrated by the bracket 30, and therefore, the amplitude of the vibration behavior of the flange portion 24 can be reduced. As a result, noise can be reduced. Further, durability of the fuel pipe 12 connected from the auxiliary device 10 as a fuel supply pump to the main body of the internal combustion engine 1 can be improved.
In the auxiliary support structure 100 for an internal combustion engine according to the embodiment disclosed above, the first fixed portion 32 extends along the flange portion 24. When a vibration behavior is generated in which the first fixed part 32 moves with respect to the mounting surface 26 (XY plane), energy of the vibration behavior is absorbed by frictional resistance generated between the first fixed part 32 and the flange portion 24. Similarly, the amplitude of the vibration behavior can be reduced to reduce noise.
In the auxiliary support structure 100 for an internal combustion engine according to the embodiment disclosed above, the second fixed portion 34 extends along the wall surface 22. When a vibration behavior is generated in which the second fixed portion 34 moves with respect to the wall surface 22 (YZ plane), energy of the vibration behavior is absorbed by frictional resistance generated between the second fixed portion 34 and the wall surface 22. Similarly, the noise can be reduced by reducing the amplitude of the vibration behavior.
The second fixed part 34 extends in the + Z direction so as to extend along the auxiliary unit 10. Accordingly, when the auxiliary unit 10 resonates and a vibration behavior is generated in which the flange portion 24 and the first fixed portion to be fixed 32 fixed to the flange portion 24 oscillate in the front-rear direction (Z direction) around the Y axis, the second fixed portion to be fixed 34 is not twisted by the vibration behavior, and therefore the vibration behavior of the flange portion 24 and the first fixed portion to be fixed 32 fixed to the flange portion 24 can be suppressed relatively easily.
In the auxiliary support structure 100 for an internal combustion engine according to the embodiment disclosed above, the coupling portion 36 is disposed along the corner 28 formed by the wall surface 22 and the flange portion 24. Thus, since the joint 36 reinforces the end in the-X direction of the flange 24, when a vibration behavior is generated that causes the flange 24 to swing back and forth about the Y axis, the vibration behavior can be easily suppressed.
In the above-described embodiment, the second fixed part 34 extends to the vehicle front (+ Z direction) along the auxiliary machine 10, but the present invention is not limited to this, and the second fixed part 34 may extend to both rear sides (-Z direction) on the opposite side to the auxiliary machine 10, depending on the positional relationship of the auxiliary machine 10 with respect to the cylinder block 20, for example. According to this configuration, even if an elastic behavior that swings the flange portion 24 and the first fixed portion to be fixed 32 occurs, the elastic behavior can be suppressed by the second fixed portion to be fixed 34 fixed to the wall surface 22. As a result, noise can be reduced.
The above embodiments are merely examples of embodying the present invention, and the technical scope of the present invention should not be limited by these embodiments. That is, the present invention may be embodied in various forms without departing from the gist or main characteristics thereof.
This application is based on the japanese patent application (japanese patent application 2020-122166) filed on 16/7/2020, the contents of which are hereby incorporated by reference in their entirety.
Industrial applicability
The present invention is suitably applied to an internal combustion engine having an auxiliary machine support structure for which noise reduction is required.
Description of the reference numerals
1: internal combustion engine
10: auxiliary machinery (Fuel supply pump)
12: fuel distribution pipe
20: cylinder block
22: wall surface
24: flange part
26: mounting surface
28: corner part
30: support frame
32: first fixed part
34: second fixed part
36: joining part
100. 200: auxiliary engine supporting structure
321. 322, 323, 341, 342, 343, 344: extension part
321h, 322h, 323h, 341h, 342h, 343h, 344h: lower hole
Claims (7)
1. An auxiliary engine support structure for an internal combustion engine, comprising:
an auxiliary machine disposed around the internal combustion engine;
a cylinder block having a wall surface and a flange portion extending in a direction orthogonal to the wall surface, and accommodating a piston;
a first fixed part to which the auxiliary unit is attached and which is fixed to the flange part;
a second fixed portion fixed to the wall surface; and
and a coupling portion that couples the first fixed portion and the second fixed portion.
2. The auxiliary support structure for an internal combustion engine according to claim 1, wherein the first fixed portion extends along the flange portion.
3. The auxiliary support structure for an internal combustion engine according to claim 1, wherein the second fixed portion extends along the wall surface.
4. The auxiliary support structure of an internal combustion engine according to claim 1, wherein the second fixed portion extends in a manner along the auxiliary.
5. The auxiliary support structure for an internal combustion engine according to claim 1, wherein the coupling portion is disposed along a corner portion formed by the wall surface and the flange portion.
6. The auxiliary support structure of an internal combustion engine according to claim 1, wherein the auxiliary includes a fuel supply pump to which a fuel pipe is connected.
7. An internal combustion engine provided with the auxiliary support structure for an internal combustion engine according to claim 1.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-122166 | 2020-07-16 | ||
| JP2020122166A JP2022018804A (en) | 2020-07-16 | 2020-07-16 | Auxiliary machine support structure of internal combustion engine and internal combustion engine |
| PCT/JP2021/026454 WO2022014637A1 (en) | 2020-07-16 | 2021-07-14 | Auxiliary support structure for internal combustion engine, and internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115917127A true CN115917127A (en) | 2023-04-04 |
Family
ID=79554715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180042687.3A Pending CN115917127A (en) | 2020-07-16 | 2021-07-14 | Auxiliary engine support structure of internal combustion engine and internal combustion engine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2022018804A (en) |
| CN (1) | CN115917127A (en) |
| WO (1) | WO2022014637A1 (en) |
Family Cites Families (6)
| 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 |
| 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 |
| JP6324921B2 (en) * | 2015-04-03 | 2018-05-16 | 株式会社日立建機ティエラ | Construction machinery |
| JP2018193964A (en) * | 2017-05-20 | 2018-12-06 | いすゞ自動車株式会社 | Reinforcing structure of power plant |
-
2020
- 2020-07-16 JP JP2020122166A patent/JP2022018804A/en active Pending
-
2021
- 2021-07-14 CN CN202180042687.3A patent/CN115917127A/en active Pending
- 2021-07-14 WO PCT/JP2021/026454 patent/WO2022014637A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| JP2022018804A (en) | 2022-01-27 |
| WO2022014637A1 (en) | 2022-01-20 |
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