CN101802352B - Sound-absorbing arrangement - Google Patents
Sound-absorbing arrangement Download PDFInfo
- Publication number
- CN101802352B CN101802352B CN2008801078580A CN200880107858A CN101802352B CN 101802352 B CN101802352 B CN 101802352B CN 2008801078580 A CN2008801078580 A CN 2008801078580A CN 200880107858 A CN200880107858 A CN 200880107858A CN 101802352 B CN101802352 B CN 101802352B
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- Prior art keywords
- container
- passage
- noise
- line
- machine
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 230000008030 elimination Effects 0.000 claims description 48
- 238000003379 elimination reaction Methods 0.000 claims description 48
- 230000003584 silencer Effects 0.000 claims description 26
- 238000002485 combustion reaction Methods 0.000 claims description 24
- 230000001276 controlling effect Effects 0.000 claims description 24
- 230000007246 mechanism Effects 0.000 claims description 23
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 11
- 239000002912 waste gas Substances 0.000 claims description 10
- 238000009795 derivation Methods 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000013016 damping Methods 0.000 abstract 5
- 238000000034 method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
- F01N1/165—Silencing apparatus characterised by method of silencing by using movable parts for adjusting flow area
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
- F01N1/166—Silencing apparatus characterised by method of silencing by using movable parts for changing gas flow path through the silencer or for adjusting the dimensions of a chamber or a pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2410/00—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device
Landscapes
- 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)
- Multimedia (AREA)
- Exhaust Silencers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The present invention relates to a sound-damping arrangement. The sound-damping arrangement comprises a sound-damping container (3) with an internal space (3a), an inlet line (2) adapted to leading a fluid to the container (3) from a machine (1) which generates during operation a dominant noise with a frequency which is related to the speed of the machine, and an outlet line (4) adapted to leading the fluid out from the container (3). The arrangement comprises also a line element (5) which has an internal passage which connects the inlet line (2) and the outlet line (4) at a position in the vicinity of the sound-damping container (3), and an adjusting device (5a-d, 6-9) adapted to adjusting the configuration of the passage and hence the acoustic characteristics of the sound-damping container so that the latter continuously assumes a natural frequency corresponding to the dominant sound frequency generated by the machine at its current speed.
Description
Technical field
The present invention relates to a kind of silencer.
Background technique
The problem that exists when determining the size of vehicle exhaust system and baffler is to be difficult to be suppressed at the leading low-frequency noise that produces in the combustion process of diesel engine and Otto engine.The frequency of this noise is along with the velocity variations of combustion engine.
Vehicle exhaust system generally includes baffler, and described baffler contains the roughly curved flow channel that is useful on waste gas.In this case, the sound that imports in the baffler was reflected many times by the wall of baffler before it can be advanced further.For this baffler, there is not too many pressure drop in order effectively to suppress low-frequency noise, it need to have very large size.The resonant mode baffler can be realized the inhibition to low-frequency noise well, but this baffler only in narrow frequency range effectively, and therefore only advantageously can be used for suppressing from the noise with the motor of constant speed work.Another kind of noise elimination technique is to produce energetically a kind of inverse noise that balances out undesired noise.This technology for example gets fine in the internal applications of vehicle, but being difficult to account in vent systems in the leading rugged environment implements.
JP 2001-140627 relates to a kind of baffler of vehicle exhaust system.Described baffler comprises waste gas is imported to the suction line of baffler and the outlet line that waste gas is derived from baffler.Tap line is extended between two of baffler different parts.Described tap line comprises control valve and chamber.Described chamber as the Extended Spaces in the baffler, is used as resonant cavity when control valve is closed when control valve is opened.
US 6,494, and 290 relate to a kind of baffler, and described baffler is arranged on air is imported in the pipeline of combustion engine.Described baffler comprises the resonant cavity that is connected with described air line.A mode of execution relates to the use of adjustable wall, and described adjustable wall can make resonant cavity have variable volume.
Summary of the invention
The purpose of this invention is to provide a kind of size relatively little, have a high performance silencer that suppresses the low-frequency noise that produces with the frequency that changes.
This purpose uses a kind of silencer to reach, it comprises the noise elimination container with the inner space, be suitable for fluid is directed to from machine the suction line of described container, and be suitable for the outlet line of described fluid from described container derivation, described machine produces the leading noise have with the frequency of the velocity correlation of described machine at run duration, wherein, described device comprises line elements and controlling mechanism, described line elements have the outside of described noise elimination container with near the position connect the inner passage of described suction line and described outlet line, described controlling mechanism is suitable for regulating the structure of described passage, thereby regulates the acoustic characteristic of described noise elimination container so that described noise elimination container presents the natural frequency corresponding with the leading sound frequency that is produced by described machine constantly under its present speed.
Traditional noise elimination container generally has apparently higher than the natural frequency of machine with the frequency of the low-frequency noise of variable velocity work generation.Therefore, enough large if traditional noise elimination container is not made, the so common ability that does not suppress low-frequency noise.Between suction line and outlet line, near the noise elimination container natural frequency that line elements can significantly reduce the noise elimination container is set.Therefore relatively little noise elimination container can have with machine with natural frequency corresponding to the frequency of the low-frequency noise of variable velocity work generation.The structure of the inner passage by suitably changing this line elements can change the acoustic characteristic of described line elements, thereby changes the natural frequency of noise elimination container.By means of regulating energetically and infinitely described line elements characteristic, for example regulating the controlling mechanism of its geometrical shape and material, can make the noise elimination container have variable natural frequency, with corresponding with the frequency of the noise of friction speed work generation with machine at each time point.This silencer has suppressed the leading low-frequency noise that machine produces very effectively, and no matter machine during operation its speed how to change.
According to a preferred embodiment of the present invention, described controlling mechanism comprises the control unit of the information that is suitable for receiving substantially constantly the associated machine present speed and is suitable for receiving the control signal that comes from described control unit and the actuator of regulating channel design based on described information.Described control unit can be the computer unit with appropriate software.Described control unit can comprise canned data, how the described information of having stored is about controlling described actuator to set the structure of described passage, so that the noise elimination container has corresponding to the natural frequency of machine with the frequency of the leading noise of its present speed operation generation.
According to a preferred embodiment of the present invention, described controlling mechanism is suitable for the structure of regulating described passage by the material of the wall that change to limit described passage.The passage that is limited by different materials has different acoustic characteristics.In this case, the structure of described passage can be by suitable measure so that described controlling mechanism can have two kinds of different materials to be used for the described wall with the variable described passage of limited proportion.Alternatively or in combination, described controlling mechanism can be suitable for regulating by the geometrical shape that changes described passage the structure of described passage.The geometrical shape that changes described passage will change its acoustic characteristic, thereby changes the natural frequency of noise elimination container.Described controlling mechanism can be suitable for changing by the length of the described passage of step-less adjustment the geometrical shape of described passage.If described controlling mechanism has increased the length of described passage, the container of eliminating the noise so presents higher natural frequency.On the contrary, if described controlling mechanism has reduced the length of described passage, the container of eliminating the noise so presents lower natural frequency.Alternatively or in combination, described controlling mechanism can be suitable for infinitely regulating the cross-section area of passage described at least one zone.This variation of cross-section area can by in the finite region that makes described passage or the valve that infinitely changes of the cross-section area of whole passage or other extending meanss realize.If described controlling mechanism has increased the cross-section area of described passage, the container of eliminating the noise so presents lower natural frequency.On the contrary, if described controlling mechanism has reduced the cross-section area of described passage, the container of eliminating the noise so presents higher natural frequency.To the relatively little change of the geometrical shape of described passage can cause the eliminating the noise large variation of natural frequency of container.
According to another preferred embodiment of the present invention, described line elements comprises at least two pipeline sections that are arranged to move relative to each other.Described pipeline section can be made from a variety of materials.When described pipeline section was placed with different linear positions relative to each other, therefore the different material of described pipeline section can be defined as the surface of the wall in the described passage the vicissitudinous size of tool.By a plurality of movable pipeline section, the length of described passage also can infinitely be changed.If described controlling mechanism has increased the length of described passage, the container of eliminating the noise so presents higher natural frequency.On the contrary, if described controlling mechanism has reduced the length of described passage, the container of eliminating the noise so presents lower natural frequency.
According to another preferred embodiment of the present invention, described suction line and described outlet line have the hole in described noise elimination container, described hole is directed relative to each other so that the sound that imports in the described container from the hole of described suction line can not be derived by the hole of described outlet line in not first by the internal surface reflection situation at least one times of described container.This noise elimination container also provides the establishment to the higher frequency noise.Preferably, suction line and outlet line be arranged in parallel near the noise elimination container.This is so that be applied to described line elements between suction line and the outlet line easilier.This noise elimination container can be called and turns to chamber.
According to another preferred embodiment of the present invention, described device is with the part of waste gas from the vent systems of combustion engine derivation.Otto engine and diesel engine produce the leading low-frequency noise that is caused by their combustion process at run duration.Therefore the frequency of this noise is along with the velocity variations of combustion engine.This low-frequency noise of utilizing traditional baffler to be difficult to suppress can use silencer according to the present invention effectively to suppress.Described silencer all can use in the situation of machine with variable frequency generation low-frequency noise in the pipeline system of gaseous state and liquid.Described device for example can be for the part of guiding from the compressed-air actuated pipeline system of compressor.Described device can also be a part of utilizing the pipeline system of machine guiding liquid, and wherein said machine has produced the leading noise that has with the frequency of the velocity correlation of described machine at run duration.In these cases, described device can be the part of hydraulic system, wherein for example has the low-frequency noise of variable frequency for the machine generation of oil pump.
Description of drawings
Below by the example relevant with accompanying drawing embodiments of the present invention are described, wherein:
Fig. 1 show first embodiment of the invention silencer and
Fig. 2 shows silencer second embodiment of the invention.
Embodiment
Fig. 1 shows the silencer in the vent systems that is suitable for being applied in combustion engine 1.Described combustion engine 1 can be diesel engine or the Otto engine with variable velocity work.Described combustion engine can provide power to the vehicle that can be heavy vehicle.Waste gas in the vent systems is imported among the inner space 3a of noise elimination container 3 via suction line 2.Suction line 2 has hole 2a, and described hole 2a is arranged in the inner wall surface one segment distance place apart from container 3.Waste gas is intended to be exported via outlet line 4 from noise elimination container 3.Outlet line 4 has hole 4a, and described hole 4a is arranged in the inner wall surface one segment distance place apart from container 3 equally.Suction line 2 and outlet line 4 have substantially parallel length near noise elimination container 3.The hole 2a of suction line and the hole 4a of outlet line arrange relative to each other so that the sound that imports in the noise elimination container 3 must be by internal surface reflection at least one times before it can be exported by exit orifice 4a.Noise elimination container 3 has consisted of the so-called chamber that turns to here.Line elements 5 with inner passage is connected connection near noise elimination containers 3 with suction line 2 with outlet line.The inner passage of line elements 5 obviously is narrower than the inner passage of suction line 2 and outlet line.
During operation, combustion engine produces the noise of being propagated by exhaust stream.Described noise is comprised of various frequencies, but the low-frequency noise that produces in the combustion process of combustion engine 1 is the noise that accounts for obvious leading position.Its frequency of this noise changes with the speed of combustion engine, utilizes traditional baffler to be difficult to suppress.Each noise elimination container has and the structure of container relevant natural frequency on material and geometrical shape.The establishment of low-frequency noise need to use very large traditional noise elimination container.But, line elements 5 be arranged on can make between suction line 2 and the outlet line 4 have the equal natural frequency of frequency that relative undersized noise elimination container 3 presents the leading low-frequency noise that produces with combustion engine 1.The 3rd 5c of pipeline section that is realized by the first actuator 6 makes the inner wall surface of described passage can be by the limited proportion of different materials with variation to the stepless linear motion of diverse location.Therefore can change the acoustic characteristic of line elements 5 and the natural frequency of noise elimination container.The valve 8 that the second actuator 7 is carried out can make the inner passage of line elements 5 be furnished with the cross-section area that presents stepless variable in the zone of described valve 8 in the stepless location on the different rotary angle.By changing the cross-section area of described passage, can also change the acoustic characteristic of line elements 5 and the natural frequency of noise elimination container 3.The advantage of this line elements 5 is the quite little change of internal channel structure cause eliminating the noise relatively large difference of container 3 natural frequencys.Therefore silencer can have relatively little size.
The operation of combustion engine 1 causes producing the waste gas that flows to noise elimination container 3 by suction line 2.Waste gas is directed to outlet line 4 from the noise elimination container.The waste gas of small scale is directed to outlet line 4 from suction line 2 via the passage of line elements 5.Control unit receives the information of the present speed of relevant combustion engine 1 substantially constantly.Control unit 9 is estimated the frequency of the leading noise of combustion engine 1 substantially constantly based on described information.Control unit 9 comprises canned data, if described information need to present the natural frequency corresponding with the leading sound frequency of combustion engine about noise elimination container 3, how actuator 6 should locate the 3rd 5c of pipeline section and how actuator 7 should locate described valve 8 so.In case the speed of combustion engine changes, control unit 9 namely starts actuator 6,7 so that noise elimination container 3 presents the natural frequency corresponding with the leading sound frequency of combustion engine constantly.Silencer can suppress to come from the leading noise of combustion engine by this way very effectively, and no matter the speed of combustion engine how.
Fig. 2 shows a kind of alternative form of silencer.In this case, described device is for the part of guiding from the compressed-air actuated pipeline system of compressor 11.The noise elimination container 3 here sees from the outside, and suction line 2 and outlet line 4 illustrate with lateral cross section.The pressurized air that comes from compressor 11 is directed into the inner space of noise elimination container 3 via suction line 2.Described air is intended to be derived from noise elimination container 3 via outlet line 4.Suction line 2 and outlet line 4 have substantially parallel length near noise elimination container 3.Tubular bulb kind of thread elements 5 with inner passage connects parallel pipeline 2,4 near noise elimination container 3.Line elements 5 comprises the first 5a of pipeline section that is fastened on the suction line 2 and the second 5b of pipeline section that is fastened on the outlet line 4.Line elements 5 comprises the 3rd 5d of pipeline section that connects the first 5a of pipeline section and the second 5b of pipeline section.The 3rd 5d of pipeline section comprises the first tubular junction 5d that is connected movingly with the first 5a of pipeline section
1With the second tubular junction 5d that is connected movingly with the second 5b of pipeline section
2The 3rd 5d of pipeline section also comprises formation tubular junction 5d
1, 5d
2Between the base portion 5d of horizontal connection
3
Be suitable for making the 3rd 5d of pipeline section infinitely to move with respect to fixing the first and second 5a of pipeline section, b at this actuator 6 that is exemplified as pressure cylinder.When the 3rd 5d of pipeline section moved downward in Fig. 2, the inner passage of line elements 5 became shorter, and when the 3rd 5d of pipeline section moved upward in Fig. 2, the passage of line elements 5 became longer.By this linear motion, can make the inner passage of line elements 5 have the length of stepless variable.Therefore also can change the acoustic characteristic of described passage and the natural frequency of noise elimination container 3.Control unit 9 be suitable for receiving substantially constantly relevant compressor 11 speed information and based on described information control actuator 6.Control unit 9 can be the computer unit that band is useful on the appropriate software of this purpose.
At compressor 11 run durations, control unit 9 receives the frequency of the leading low-frequency noise that the information and determine of the speed of relevant compressor 11 sent by compressor 11 substantially constantly.Alternatively, control unit 9 can receive the information that comes from the sound transducer that detects the noise that is produced by compressor.Based on described information, control unit control actuator 6 has and the leading low-frequency noise of compressor 11 length of corresponding natural frequency constantly noise elimination container 3 so that line elements 5 presents.The leading low-frequency noise that therefore in described silencer, can effectively suppress compressor 11.
The present invention is in no way limited at the shown mode of execution of accompanying drawing, but can freely change within the scope of the claims.Described silencer can be arranged on and guide in any required pipeline system that comes from the fluid that produces the machine with variable frequency noise.Such fluid can be gaseous state or liquid.In mode of execution as an example the element, controlling mechanism can comprise that certainly other elements are to be used for changing the natural frequency of noise elimination container except described.Also can be in noise elimination container 3 and/or line elements 5 is interior that dissimilar muffler materials is set.
Claims (11)
1. silencer, it comprises the noise elimination container (3) with inner space (3a), be suitable for fluid is directed to from machine (1) suction line (2) of described container (3), and be suitable for the outlet line (4) of described fluid from described container (3) derivation, described machine (1) produces the leading noise have with the frequency of the velocity correlation of described machine at run duration, it is characterized in that, described suction line (2) and outlet line (4) be arranged in parallel near noise elimination container (3), described device comprises line elements (5) and controlling mechanism (5a-d, 6-9), described line elements (5) have the outside of described noise elimination container (3) with near the position connect the inner passage of described suction line (2) and described outlet line (4), described controlling mechanism (5a-d, 6-9) be suitable for regulating the structure of described passage, thereby regulate the acoustic characteristic of described noise elimination container so that described noise elimination container presents the natural frequency corresponding with the leading sound frequency that is produced by described machine constantly under its present speed.
2. silencer according to claim 1, it is characterized in that described controlling mechanism comprises and is suitable for receiving substantially constantly about the control unit (9) of the information of the present speed of described machine (1) and is suitable for from described control unit (9) reception control signal and is suitable for regulating based on described information the actuator (6,7) of the structure of described passage.
3. silencer according to claim 1 and 2 is characterized in that, described controlling mechanism (5a-c, 6,9) is suitable for the structure of regulating described passage by the material (5a-c) of the wall that change to limit described passage.
4. silencer according to claim 1 and 2 is characterized in that, described controlling mechanism (5a, b, d, 6-9) is suitable for regulating by the geometrical shape that changes described passage the structure of described passage.
5. silencer according to claim 4 is characterized in that, described controlling mechanism (5a, b, d, 6,9) is suitable for changing by the length of infinitely regulating described passage the geometrical shape of described passage.
6. silencer according to claim 1 and 2 is characterized in that, described controlling mechanism (7,8,9) is suitable for changing by the cross-section area of infinitely regulating the described passage at least one zone the geometrical shape of described passage.
7. silencer according to claim 1 and 2 is characterized in that, described line elements (5) comprises at least two pipeline sections (5a-d) that are configured to move relative to each other.
8. silencer according to claim 1 and 2, it is characterized in that, described suction line (2) and described outlet line (4) have hole (2a, 4a) in described noise elimination container (3), described hole is directed relative to each other so that the sound that imports in the described container (3) from the hole (2a) of described suction line can not be by hole (4a) derivation of described outlet line in not first by the internal surface reflection situation at least one times of described container (3).
9. silencer according to claim 1 and 2 is characterized in that, described device is the part for the vent systems that waste gas is derived from combustion engine (1).
10. silencer according to claim 1 and 2 is characterized in that, described device is for the part of guiding from the compressed-air actuated pipeline system of compressor (11).
11. silencer according to claim 1 and 2, it is characterized in that, described device is the part be used to the pipeline system that utilizes machine guiding liquid, and described machine produces the leading noise that has with the frequency of the velocity correlation of described machine at run duration.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0702130A SE531516C2 (en) | 2007-09-25 | 2007-09-25 | Noise-canceling arrangement |
| SE0702130-6 | 2007-09-25 | ||
| PCT/SE2008/051046 WO2009041892A1 (en) | 2007-09-25 | 2008-09-18 | Sound-absorbing arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101802352A CN101802352A (en) | 2010-08-11 |
| CN101802352B true CN101802352B (en) | 2013-03-13 |
Family
ID=40511685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008801078580A Expired - Fee Related CN101802352B (en) | 2007-09-25 | 2008-09-18 | Sound-absorbing arrangement |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP2195512B1 (en) |
| KR (1) | KR101648526B1 (en) |
| CN (1) | CN101802352B (en) |
| AU (1) | AU2008305782B2 (en) |
| BR (1) | BRPI0816220A2 (en) |
| SE (1) | SE531516C2 (en) |
| WO (1) | WO2009041892A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012109667A1 (en) * | 2012-10-11 | 2014-04-17 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Exhaust system for e.g. sports car, has exhaust gas secondary line whose length is adjusted based on engine speed and exhaust gas temperature, such that exhaust noise is produced from two cylinders of internal combustion engine |
| EP3242293B1 (en) * | 2016-05-04 | 2018-12-05 | Sontech International AB | A sound damping device for a duct or chamber |
| KR101867573B1 (en) * | 2016-05-23 | 2018-06-15 | 현대자동차주식회사 | Slip-type active noise control muffler and method for controlling the same |
| US10071664B2 (en) * | 2016-10-21 | 2018-09-11 | Ford Global Technologies, Llc | System and method for variable sound dampening in an adjustable vehicle seat |
| CN112102805B (en) * | 2020-08-28 | 2024-05-14 | 武汉理工大学 | Impedance-adjustable composite muffler and noise elimination system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4341951A1 (en) * | 1992-12-17 | 1994-06-23 | Volkswagen Ag | Interference noise damper for exhaust gas system |
| JP2001140627A (en) * | 1999-11-17 | 2001-05-22 | Fuji Heavy Ind Ltd | Exhaust silencer for automobile |
| US6633646B1 (en) * | 1999-07-07 | 2003-10-14 | Korea Institute Of Science And Technology | Method and apparatus for controlling exhaust noise |
| EP1017936B1 (en) * | 1997-10-01 | 2004-02-25 | Mann + Hummel GmbH | Silencer with a bypass resonator |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4136206A1 (en) * | 1991-11-02 | 1993-05-06 | Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart, De | EXHAUST SYSTEM OF A MOTOR VEHICLE PISTON ENGINE |
| JPH08189330A (en) * | 1995-01-10 | 1996-07-23 | Toyota Motor Corp | Muffler for internal combustion engine |
| DE19520157A1 (en) * | 1995-06-01 | 1996-12-05 | Wolfgang Lenhardt | Motor vehicle exhaust silencer with choke flap |
| JPH0988568A (en) * | 1995-09-26 | 1997-03-31 | Toyota Motor Corp | Exhaust device for internal combustion engine |
| KR20020074965A (en) * | 2001-03-23 | 2002-10-04 | 기아자동차주식회사 | Structure of a silencer type of frequency variability |
-
2007
- 2007-09-25 SE SE0702130A patent/SE531516C2/en unknown
-
2008
- 2008-09-18 KR KR1020107009125A patent/KR101648526B1/en active IP Right Grant
- 2008-09-18 WO PCT/SE2008/051046 patent/WO2009041892A1/en active Application Filing
- 2008-09-18 BR BRPI0816220-4A patent/BRPI0816220A2/en not_active IP Right Cessation
- 2008-09-18 CN CN2008801078580A patent/CN101802352B/en not_active Expired - Fee Related
- 2008-09-18 EP EP08834479.1A patent/EP2195512B1/en active Active
- 2008-09-18 AU AU2008305782A patent/AU2008305782B2/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4341951A1 (en) * | 1992-12-17 | 1994-06-23 | Volkswagen Ag | Interference noise damper for exhaust gas system |
| EP1017936B1 (en) * | 1997-10-01 | 2004-02-25 | Mann + Hummel GmbH | Silencer with a bypass resonator |
| US6633646B1 (en) * | 1999-07-07 | 2003-10-14 | Korea Institute Of Science And Technology | Method and apparatus for controlling exhaust noise |
| JP2001140627A (en) * | 1999-11-17 | 2001-05-22 | Fuji Heavy Ind Ltd | Exhaust silencer for automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20100061568A (en) | 2010-06-07 |
| KR101648526B1 (en) | 2016-08-16 |
| EP2195512A4 (en) | 2017-11-29 |
| AU2008305782B2 (en) | 2012-09-06 |
| AU2008305782A1 (en) | 2009-04-02 |
| CN101802352A (en) | 2010-08-11 |
| EP2195512A1 (en) | 2010-06-16 |
| SE0702130L (en) | 2009-03-26 |
| EP2195512B1 (en) | 2018-11-28 |
| WO2009041892A1 (en) | 2009-04-02 |
| SE531516C2 (en) | 2009-05-05 |
| BRPI0816220A2 (en) | 2015-06-16 |
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