CN110594058A - Vehicle engine room based on Helmholtz resonator principle - Google Patents
Vehicle engine room based on Helmholtz resonator principle Download PDFInfo
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- CN110594058A CN110594058A CN201910810684.4A CN201910810684A CN110594058A CN 110594058 A CN110594058 A CN 110594058A CN 201910810684 A CN201910810684 A CN 201910810684A CN 110594058 A CN110594058 A CN 110594058A
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- 238000010521 absorption reaction Methods 0.000 claims description 48
- 239000000463 material Substances 0.000 claims description 16
- 229920000742 Cotton Polymers 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 22
- 239000011358 absorbing material Substances 0.000 abstract description 16
- 238000009413 insulation Methods 0.000 abstract description 12
- 230000006872 improvement Effects 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 description 10
- 239000002245 particle Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 5
- 230000002238 attenuated effect Effects 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
- F02M35/1261—Helmholtz resonators
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Abstract
The invention belongs to the technical field of automobiles, in particular to a vehicle engine room based on the Helmholtz resonator principle, which comprises a vehicle body, wherein a cab is arranged in the middle of the vehicle body, wheels are arranged at the bottom end of the vehicle body, an engine cabin is arranged at the front side of the cab, a front grille is arranged at the front side of the engine cabin, a cabin wall structure is arranged outside the engine cabin, an engine hood is arranged at the upper end of the engine cabin, a sound escape opening is arranged at the bottom end of the engine cabin, the cabin wall structure comprises an outer layer structure, supporting rubber, a plate-shaped sound absorbing plate, porous sound absorbing materials, a porous sound absorbing plate and a sound absorbing wedge which are arranged in sequence, and the overall sound insulation effect is improved by arranging the outer layer structure, the supporting rubber, the plate-shaped sound absorbing plate, the porous sound absorbing materials, the porous sound absorbing plate and the sound absorbing wedge in the cabin wall structure, it all installs bulkhead structure through all around engine compartment, can effectual improvement sound insulation effect.
Description
Technical Field
The invention belongs to the technical field of automobiles, and particularly relates to a vehicle engine room based on the Helmholtz resonator principle.
Background
The automobile engine is a device for providing power for an automobile, is the heart of the automobile and determines the dynamic property, the economical efficiency, the stability and the environmental protection property of the automobile. According to different power sources, the automobile engine can be divided into a diesel engine, a gasoline engine, an electric automobile motor, hybrid power and the like.
Common gasoline engines and diesel engines belong to reciprocating piston internal combustion engines, and convert chemical energy of fuel into mechanical energy of piston motion and output power outwards. The gasoline engine has high rotating speed, low quality, low noise, easy starting and low manufacturing cost; the diesel engine has large compression ratio, high heat efficiency, and better economic performance and discharge performance than the gasoline engine.
The engine is the power device of the automobile and is a split plan view of 2 automobiles. The mechanism 5 mainly comprises: the engine comprises a crank link mechanism, a valve actuating mechanism, a cooling system, a fuel supply system, a lubricating system, an ignition system and a starting system, but the diesel engine has one ignition system less than the gasoline engine. A cooling system: generally comprises a water tank, a water pump, a radiator, a fan, a thermostat, a water thermometer, a water drain switch and the like. The automobile engine adopts two cooling modes, namely air cooling and water cooling. Generally, automobile engines are mostly cooled by water. The lubricating system: the engine lubrication system is composed of an engine oil pump, a strainer, an oil filter, an oil duct, a pressure limiting valve, an engine oil meter, a pressure sensing plug, an oil gauge and the like. Fuel supply system: the fuel system of gasoline engine includes gasoline tank, gasoline meter, gasoline pipe, gasoline filter, gasoline pump, carburetor, air filter, etc. The diesel engine fuel system comprises main components such as a fuel injection pump, a fuel injector, a speed regulator and the like, and auxiliary devices such as a diesel tank, a fuel delivery pump, an oil-water separator, a diesel filter, a fuel injection advance device, a high-pressure oil pipe, a low-pressure oil pipe and the like. General cooling system of automobile, starting system: a starter, a battery, etc. An ignition system: spark plug, high-voltage wire, high-voltage coil, distributor, ignition switch, etc. A crank link mechanism: connecting rod, crankshaft, bearing bush, flywheel, piston ring, piston pin, crankshaft oil seal, etc. A valve mechanism: cylinder head, valve cover camshaft, valve intake manifold, exhaust manifold, air filter, silencer, three-way catalytic supercharger, etc.
The engine is a power source of the automobile, and most of the automobile engines are heat energy power devices, which are called heat engines for short. The heat engine converts the heat energy generated by fuel combustion into mechanical energy by means of the state change of the working medium.
A vehicle engine is a source of noise, the noise generation of which varies with engine speed (primarily through front fender, hood, firewall, exhaust pipe generation and transmission).
A vehicle engine is a source of noise, the noise generation of which varies with engine speed. When the air inlet and outlet pipe leaks, when the engine is started, air can leak from the leakage part during air inlet and outlet, so that vibration is generated, and noise is generated. The tire noise is generated by friction between a tire and a road surface when a vehicle runs at a high speed, the tire noise is determined according to road conditions and vehicle conditions, the tire noise is larger when the road conditions are worse, and the tire noise generated by an asphalt road surface and a mud-mixed road surface is greatly different. The wind noise is generated when the pressure of the oncoming wind exceeds the sealing resistance of the door of the automobile and enters the automobile during high-speed running, and the higher the running speed is, the larger the wind noise is.
Compared with the prior art the problem that exists:
the sound insulation effect of the engine compartment of the existing automobile is not good.
Disclosure of Invention
To solve the problems set forth in the background art described above. The invention provides a vehicle engine room based on the Helmholtz resonator principle, which has the characteristic of good sound insulation effect.
In order to achieve the purpose, the invention provides the following technical scheme: a vehicle engine room based on the Helmholtz resonator principle comprises a vehicle body, wherein a cab is arranged in the middle of the vehicle body, wheels are arranged at the bottom end of the vehicle body, an engine room is arranged on the front side of the cab, a front grille is arranged on the front side of the engine room, a bulkhead structure is arranged on the outer side of the engine room, an engine hood is arranged at the upper end of the engine room, and a sound escape opening is arranged at the bottom end of the engine room.
Preferably, the bulkhead structure comprises an outer layer structure, supporting rubber, a plate-shaped sound absorbing plate, a porous sound absorbing material, a perforated sound absorbing plate and a sound absorbing wedge, which are sequentially arranged, the outer layer structure, the supporting rubber, the plate-shaped sound absorbing plate, the porous sound absorbing material, the perforated sound absorbing plate and the sound absorbing wedge are arranged in the bulkhead structure, so that the whole sound insulation effect is improved, an air layer is sealed between the outer layer structure and the plate-shaped sound absorbing plate to form a helmholtz resonator model, the sound absorption effect is achieved, and the porous sound absorbing material, the perforated sound absorbing plate and other attenuation materials are respectively arranged in the bulkhead structure, so that the upper effect and the lower effect of the resonance frequency can be increased.
Preferably, the bulkhead structures are respectively arranged at the left side, the right side, the rear side and the inside of an engine hood of the engine compartment, and the bulkhead structures are arranged at the periphery of the engine compartment, so that the sound insulation effect can be effectively improved.
Preferably, the number of the sound escape openings is several, the sound escape openings are located at the bottom end of the engine room and the front grille, and noise can escape from the sound escape openings through the sound escape openings.
Preferably, the outer layer structure is made of a steel plate, one side of the outer layer structure is connected with a bolt, the bolt is communicated with the sound-absorbing wedge, and the bolt penetrates through the middle of the supporting rubber and is fixed integrally.
Preferably, the plate-shaped sound absorption plate and the perforated sound absorption plate are made of aluminum alloy, a plurality of holes are formed in the upper side of the perforated sound absorption plate, the sizes of the small holes of the perforated sound absorption plate are different, sound absorption can be achieved through the installed perforated sound absorption plate, and due to the fact that the gaps and the sizes among the holes are changed, sound absorption can be achieved for any multiple frequencies.
Preferably, the material of the porous sound-absorbing material is sound-absorbing cotton, and the porous sound-absorbing material is not in contact with the plate-shaped sound-absorbing plate and the perforated sound-absorbing plate, so that sound absorption can be performed by installing the sound-absorbing cotton, and noise is reduced.
Preferably, one side of the wedge absorber is provided with an irregular sharp edge, and when the wedge absorber reflects sound, the sound wave energy is attenuated, so that the effects of absorbing sound and reducing noise are further achieved.
Compared with the prior art, the invention has the beneficial effects that: the outer layer structure, the supporting rubber, the plate-shaped sound absorption plate, the porous sound absorption material, the porous sound absorption plate and the sound absorption wedges are arranged in the bulkhead structure, so that the overall sound insulation effect is improved, and the bulkhead structure is arranged on the periphery of the engine compartment, so that the sound insulation effect can be effectively improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a cross-sectional structural schematic view of a bulkhead structure of the invention;
FIG. 2 is a schematic top sectional view of an automobile according to the present invention;
FIG. 3 is a schematic front sectional view of an automobile according to the present invention;
in the figure: 1. a vehicle body; 2. a cab; 3. a wheel; 4. an engine compartment; 5. a front grille; 6. a bulkhead structure; 601. an outer layer structure; 602. a supporting rubber; 603. a plate-shaped sound absorbing panel; 604. a porous sound absorbing material; 605. a perforated sound absorbing panel; 606. a sound-absorbing wedge; 7. an engine hood; 8. a sound escape opening.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-3, the present invention provides the following technical solutions: a vehicle engine room based on the Helmholtz resonator principle comprises a vehicle body 1, wherein a cab 2 is arranged in the middle of the vehicle body 1, wheels 3 are arranged at the bottom end of the vehicle body 1, an engine room 4 is arranged on the front side of the cab 2, a front grille 5 is arranged on the front side of the engine room 4, a bulkhead structure 6 is arranged on the outer side of the engine room 4, an engine hood 7 is arranged at the upper end of the engine room 4, and a sound escape opening 8 is arranged at the bottom end of the engine room 4.
In this embodiment: all install bulkhead structure 6 through all around at engine compartment 4, can effectual improvement syllable-dividing effect, through sound escape opening 8, can make the noise escape from sound escape opening 8 department, its bolt is worn at support rubber 602 middle part, and fixed whole, can carry out the sound absorption through the porose acoustic baffle 605 of installing, and because the clearance and the size between the change aperture, can both absorb sound to arbitrary a plurality of frequencies.
Specifically, sound absorption is an action of converting the kinetic energy of sound waves into thermal energy. Therefore, the particles vibrating in the air and the rigid outer layer structure emit sound absorption wavelength into the material, and the effect is better. Therefore, when an acoustic wave having a wavelength λ is incident on the rigid outer layer structure in consideration of a standing wave in the vicinity of the outer layer structure, the particle velocity of the incident wave is determined by the particle velocityAnd the particle velocity of the reflected waveGenerating a standing wave in front of the outer layer structure;
with respect to the incident wave, it is,
as to the reflected wave,
with regard to the composite wave, it is,
in the formula (I), the compound is shown in the specification,is the maximum amplitude value of sound pressure, p is the air density, c is the speed of sound in airAngular velocity; and x is the distance to the wall surface in the direction perpendicular to the wall surface.
Is given by the formula kx = n(n is a positive integer), the particle velocity u is minimized, kx = (2n-1) pi/2, that is, x =(2n-1) lambda/4, the particle velocity u reaches a maximum.
In other words, the particle velocity is maximized at positions that are odd multiples of the wavelength of wall 1/4, i.e., λ/4,5 λ/4. Therefore, it is not meaningful to stick the sound absorbing material directly to the wall, which can absorb only high frequency sounds having a wavelength less than 4 times the thickness of the sound absorbing material. That is, the sound absorption rate when the patch is directly attached to the face is large in a high frequency range exceeding a predetermined frequency, but is very small in a low frequency range.
Therefore, the air gaps are arranged on the wall surface of the sound absorption material in parallel, and good sound absorption rate can be obtained under the specific frequency of low frequency. In addition, although the ideal plane wave can be calculated as described above when the sound absorbing material is irradiated perpendicularly, in an actual sound field, the effective air gap layer thickness naturally increases due to oblique irradiation and random irradiation in many cases, and deviates from the result of perpendicular irradiation.
Two characteristic values that characterize the properties of a porous material are porosity and flow resistance. Porosity refers to the proportion of the volume of air contained relative to the overall volume of the material. The flow resistance is a characteristic value of the difficulty of passing through the air material and can be expressed by formula= . Here, the first and second liquid crystal display panels are,is the loss of pressure through the material,is the velocity through the air and d is the thickness of the material.
Specifically, the bulkhead structure 6 includes an outer layer structure 601, a supporting rubber 602, a plate-shaped sound absorbing plate 603, a porous sound absorbing material 604, a perforated sound absorbing plate 605, and a sound absorbing wedge 606, which are arranged in sequence; an outer layer structure 601, supporting rubber 602, a plate-shaped sound absorbing plate 603, a porous sound absorbing material 604, a perforated sound absorbing plate 605 and a sound absorbing wedge 606 are arranged in the bulkhead structure 6, so that the whole sound insulation effect is improved, an air layer is sealed between the outer layer structure 601 and the plate-shaped sound absorbing plate 603 to form a Helmholtz resonator model, the sound absorption effect is achieved, and damping materials such as the porous sound absorbing material 604 and the perforated sound absorbing plate 605 are respectively arranged in the bulkhead structure, so that the up-down effect of the resonance frequency can be improved.
Specifically, bulkhead structures 6 are respectively installed on the left side, right side, rear side, and inside the engine hood 7 of the engine compartment 4; by installing the bulkhead structures 6 all around the engine compartment 4, the sound insulation effect can be effectively improved.
Specifically, the number of the sound escape openings 8 is several, and the sound escape openings are positioned at the bottom end of the engine room and the position of the front grille 5; the sound escape port 8 allows noise to escape from the sound escape port 8.
Specifically, the outer layer structure 601 is made of a steel plate, one side of which is connected with a bolt, and the bolt is communicated with the sound absorption wedge 606; the bolt is threaded in the middle of the supporting rubber 602 and is fixed into a whole.
Specifically, the plate-shaped sound absorbing board 603 and the perforated sound absorbing board 605 are made of aluminum alloy, a plurality of holes are formed in the upper side of the perforated sound absorbing board 605, and the sizes of the small holes of the perforated sound absorbing board 605 are different; sound absorption is possible by installing the perforated sound absorption plate 605, and sound absorption can be performed for any of a plurality of frequencies by changing the gap and size between the apertures.
Specifically, the material of the porous sound-absorbing material 604 is sound-absorbing cotton, and the porous sound-absorbing material 604 is not in contact with the plate-shaped sound-absorbing plate 603 and the perforated sound-absorbing plate 605; the sound absorption can be carried out by installing the sound absorption cotton, and the noise is reduced.
Specifically, one side of sound wedge 606 is provided with an irregular sharp edge; when the sound is reflected by the sound wedge 606, the sound wave energy is attenuated, and the effects of sound absorption and noise reduction are further achieved.
The working principle and the using process of the invention are as follows: in use, since the bulkhead structures 6 are respectively installed at the left side, right side, rear side of the engine compartment 4 and inside the engine hood 7, the sound insulation effect can be effectively improved by arranging the bulkhead structures 6 on the periphery of the engine compartment 4, wherein each bulkhead structure 6 comprises an outer layer structure 601, supporting rubber 602, a plate-shaped sound absorption plate 603, a porous sound absorption material 604, a perforated sound absorption plate 605 and a sound absorption wedge 606, which are arranged in sequence, have good sound insulation effect, can absorb sound through the arranged sound-absorbing boards 605 with holes, and because the gap and the size among the apertures are changed, can absorb sound at any frequency, can absorb sound by installing sound absorption cotton, reduces noise, and when the sound is reflected by the sound absorption wedges 606, the sound wave energy is attenuated, the effects of sound absorption and noise reduction are further achieved, and the noise can escape from the sound escape opening 8 through the sound escape opening 8.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A vehicle engine room based on the Helmholtz resonator principle comprises a vehicle body (1), a cab (2) is installed in the middle of the vehicle body (1), wheels (3) are installed at the bottom end of the vehicle body (1), an engine compartment (4) is installed at the front side of the cab (2), a front grille (5) is installed at the front side of the engine compartment (4), and the vehicle engine room is characterized in that: a bulkhead structure (6) is arranged on the outer side of the engine compartment (4), an engine hood (7) is arranged at the upper end of the engine compartment (4), and a sound escape opening (8) is arranged at the bottom end of the engine compartment (4).
2. A helmholtz resonator principle based vehicle engine room according to claim 1, characterized in that: the bulkhead structure (6) comprises an outer layer structure (601), supporting rubber (602), a plate-shaped sound absorption plate (603), a porous sound absorption material (604), a porous sound absorption plate (605) and sound absorption wedges (606), which are arranged in sequence.
3. A helmholtz resonator principle based vehicle engine room according to claim 1, characterized in that: the bulkhead structures (6) are respectively arranged at the left side, the right side and the rear side of the engine compartment (4) and inside the engine hood (7).
4. A helmholtz resonator principle based vehicle engine room according to claim 1, characterized in that: the number of the sound escape openings (8) is a plurality, and the sound escape openings are located at the bottom end of the engine room and the position of the front grille (5).
5. A vehicle engine room based on helmholtz resonator principle according to claim 1 or 2, characterized in that: the outer layer structure (601) is made of a steel plate, one side of the outer layer structure is connected with a bolt, and the bolt is communicated with the sound absorption wedge (606).
6. A vehicle engine room based on helmholtz resonator principle according to claim 1 or 2, characterized in that: the plate-shaped sound absorption plate (603) and the perforated sound absorption plate (605) are made of aluminum alloy, a plurality of holes are formed in the upper side of the perforated sound absorption plate (605), and the sizes of the small holes of the perforated sound absorption plate (605) are different.
7. A vehicle engine room based on helmholtz resonator principle according to claim 1 or 2, characterized in that: the material of the porous sound absorption material (604) is sound absorption cotton, and the porous sound absorption material (604) is not in contact with the plate-shaped sound absorption plate (603) and the porous sound absorption plate (605).
8. A vehicle engine room based on helmholtz resonator principle according to claim 1 or 2, characterized in that: one side of the sound-absorbing wedge (606) is provided with an irregular sharp edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910810684.4A CN110594058A (en) | 2019-08-29 | 2019-08-29 | Vehicle engine room based on Helmholtz resonator principle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910810684.4A CN110594058A (en) | 2019-08-29 | 2019-08-29 | Vehicle engine room based on Helmholtz resonator principle |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2501932Y (en) * | 2001-08-15 | 2002-07-24 | 北新建材(集团)有限公司 | Mineral wool board with noise eliminating function |
| US20030151274A1 (en) * | 2000-05-29 | 2003-08-14 | Claude Buisson | Lightweight vehicle flooring assembly |
| CN101266786A (en) * | 2007-03-14 | 2008-09-17 | 中国船舶重工集团公司第七二五研究所 | A muffler for muffling water pool and its making method |
| CN101905677A (en) * | 2010-01-29 | 2010-12-08 | 浙江吉利汽车研究院有限公司 | Sound-insulation structure of engine compartment |
| CN202439639U (en) * | 2012-02-17 | 2012-09-19 | 十堰博兴汽车装饰制品有限公司 | Sound absorption type car interior decoration ceiling |
| CN107724265A (en) * | 2016-08-12 | 2018-02-23 | 中铁四局集团有限公司 | Novel metal sound barrier and manufacturing process thereof |
| CN108532791A (en) * | 2018-06-15 | 2018-09-14 | 苏州岸肯电子科技有限公司 | A kind of sound-absorbing wall |
-
2019
- 2019-08-29 CN CN201910810684.4A patent/CN110594058A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030151274A1 (en) * | 2000-05-29 | 2003-08-14 | Claude Buisson | Lightweight vehicle flooring assembly |
| CN2501932Y (en) * | 2001-08-15 | 2002-07-24 | 北新建材(集团)有限公司 | Mineral wool board with noise eliminating function |
| CN101266786A (en) * | 2007-03-14 | 2008-09-17 | 中国船舶重工集团公司第七二五研究所 | A muffler for muffling water pool and its making method |
| CN101905677A (en) * | 2010-01-29 | 2010-12-08 | 浙江吉利汽车研究院有限公司 | Sound-insulation structure of engine compartment |
| CN202439639U (en) * | 2012-02-17 | 2012-09-19 | 十堰博兴汽车装饰制品有限公司 | Sound absorption type car interior decoration ceiling |
| CN107724265A (en) * | 2016-08-12 | 2018-02-23 | 中铁四局集团有限公司 | Novel metal sound barrier and manufacturing process thereof |
| CN108532791A (en) * | 2018-06-15 | 2018-09-14 | 苏州岸肯电子科技有限公司 | A kind of sound-absorbing wall |
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