CN203335193U - Noise-reducing silencer and engine exhaust structure using same - Google Patents
Noise-reducing silencer and engine exhaust structure using same Download PDFInfo
- Publication number
- CN203335193U CN203335193U CN2013203276809U CN201320327680U CN203335193U CN 203335193 U CN203335193 U CN 203335193U CN 2013203276809 U CN2013203276809 U CN 2013203276809U CN 201320327680 U CN201320327680 U CN 201320327680U CN 203335193 U CN203335193 U CN 203335193U
- Authority
- CN
- China
- Prior art keywords
- air
- outlet
- cavity
- outlet chamber
- noise
- Prior art date
- 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
- 230000003584 silencer Effects 0.000 title claims abstract description 27
- 230000007704 transition Effects 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 13
- 229920000742 Cotton Polymers 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 230000030279 gene silencing Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 35
- 230000000694 effects Effects 0.000 description 8
- 239000002912 waste gas Substances 0.000 description 7
- 230000009467 reduction Effects 0.000 description 5
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 238000010943 off-gassing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010622 cold drawing Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 241000628997 Flos Species 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Exhaust Silencers (AREA)
Abstract
The utility model discloses a noise-reducing silencer and an engine exhaust structure using the same. The noise-reducing silencer is provided with a pressure-relief pipe used for guiding air in an air inlet cavity directly into an air outlet cavity. The inlet of the pressure-relief pipe is located in the air inlet cavity, and the outlet of the pressure-relief pipe is located in the air outlet cavity. When in use, the pressure-relief pipe can enable the air in the air inlet cavity to pass through the pressure-relief pipe and directly flow into the air outlet cavity, namely, the air in the air inlet cavity can be divided into two parts and then flows into the air outlet cavity respectively through the pressure-relief pipe and a resonating pipe, and the air in the air inlet cavity is divided through the pressure-relief pipe. Especially when the air in the air inlet cavity of a barrel body flows insufficiently, the air remaining in the air inlet cavity can flow into the air outlet cavity directly through the pressure-relief pipe and is discharged out of the air outlet cavity. Consequently, the flow velocity of the air in the whole noise-reducing silencer is increased, and influence on the flow velocity of the air in the process of silencing is reduced.
Description
Technical field
The utility model relates to noise-reducing silencer and uses the engine exhaust mechanism of this noise-reducing silencer.
Background technique
At present, the acoustic wave filter structure majority that the passenger vehicle vent systems is used is reactive muffler, reactive muffler is to cause that by sudden change place of pipeline section or the other resonant cavity etc. of connecing the change of impedance produces the reflection of acoustic energy, interference in the propagation of sound process, thereby reduce by silencing apparatus to extraradial acoustic energy, to reach the silencing apparatus of noise elimination purpose.Narrow band noise and the Middle and low frequency noise of the applicable control engine of reactive muffler, but it is poor that the high-frequency noises of motor is controlled to effect, is not suitable for the noise reduction process of the medium-high frequency noise of motor.Especially more difficult to the low-frequency noise of diesel engine, if eliminate low frequency, longer silencing apparatus profile will be set, be unfavorable for like this vent systems layout.
The Chinese invention patent that application number is 201010547693.8 discloses a kind of impedance composite muffler of vehicle inner layer heat-insulation, the canular cylindrical shell extended before and after this silencing apparatus comprises, two end cap on shutoff cylindrical shell two-port, parallel interval is distributed in two dividing plates in cylindrical shell, be provided with the cotton of eliminating the noise on the inwall of cylindrical shell, the inner chamber that two dividing plates will be processed cylindrical shell is divided into the air-inlet cavity distributed successively from front to back, outlet chamber and resonant cavity, air-inlet cavity and resonant cavity are communicated with by resonantron, air-inlet cavity is communicated with suction tude, the two ends mouth of pipe of resonantron is communicated with air-inlet cavity and resonant cavity, middle part is in outlet chamber, and offer the resonance micropore that is communicated with its endoporus and outlet chamber on the periphery of the middle part of resonantron, be provided with in outlet chamber that the front end mouth of pipe is communicated with outlet chamber and spaced apart with the resonance micropore, the rear end mouth of pipe stretches out the steam outlet pipe of cylindrical shell, in use, enter the tail gas of air-inlet cavity after the inflow resonantron through suction tude, a part enters resonant cavity from the rear end mouth of pipe of resonantron, another part with enter the gas responance effect of resonant cavity after from the resonance micropore, enter in outlet chamber, the gas that enters outlet chamber is discharged by steam outlet pipe through the space between resonance micropore and the suction tude front end mouth of pipe, the cotton meeting of simultaneously eliminating the noise absorbs the noise in each chamber inner exhaust gas, so that this silencing apparatus is by the resonance noise reduction, the diffusion noise reduction, the mode that absorbs noise reduction is eliminated the noise of each frequency range be mingled with in tail gas.But in whole noise reduction process, the flow path of tail gas is more single, especially after tail gas enters resonantron, the tail gas be trapped in resonant cavity can produce and hinder the tail gas in resonantron, to reduce the flow velocity of tail gas, so when high engine speeds is moved, the inhibition that this silencing apparatus can be larger to the mobile generation of the tail gas in outlet pipe, cause the tail gas in outlet pipe the not smooth situation that flows to occur, affect the normal operation of motor.
The model utility content
The purpose of this utility model is to provide and a kind ofly reduces noise reduction and cross the noise-reducing silencer of degree on gas flow rate impact, and the engine exhaust mechanism that uses this noise-reducing silencer also is provided simultaneously.
In order to realize above purpose, the technological scheme of noise-reducing silencer of the present utility model is as follows:
A kind of noise-reducing silencer, comprise that two-port is by the canular cylindrical shell of end cap shutoff, the inner chamber of described cylindrical shell is split at least three chambers spaced apart, there is resonant cavity in each chamber, the air-inlet cavity that supplied gas flows into, the outlet chamber that supplied gas flows out, described air-inlet cavity and resonant cavity are communicated with by resonantron, the entrance of resonantron is in suction tude, outlet is in resonant cavity, offer the resonance micropore that has between resonant cavity and air-inlet cavity and be communicated with outlet chamber on periphery, also comprise for the gas by air-inlet cavity and directly import the relief tube in outlet chamber, the entrance of described relief tube is in air-inlet cavity, outlet is in outlet chamber.
The entrance of described relief tube and the entrance of resonantron are spaced apart on the direction perpendicular to relief tube length, and described air-inlet cavity is provided with the inflation inlet that supplied gas flows into, and described inflation inlet is near the entrance of resonantron and away from the entrance of relief tube.
The outlet end of described inflation inlet in the coconnected suction tude of air-inlet cavity, the mouth of pipe sealing of the outlet end of described suction tude, the inflation micropore of offering on the outlet side that described inflation inlet is suction tude.
Described outlet chamber comprises front outlet chamber between resonant cavity and air-inlet cavity, in the resonant cavity rear outlet chamber of a side of air-inlet cavity dorsad, described forward and backward outlet chamber is communicated with by transition tube, and described resonance micropore is in described front outlet chamber.
The chamber wall of described outlet chamber is provided with the cotton layer of eliminating the noise.
The technological scheme of engine exhaust mechanism of the present utility model is as follows:
A kind of engine exhaust mechanism, comprise outlet pipe and the coconnected noise-reducing silencer of outlet pipe for discharging motor exhaust, described noise-reducing silencer comprises that two-port is by the canular cylindrical shell of end cap shutoff, the inner chamber of described cylindrical shell is split at least three chambers spaced apart, there is resonant cavity in each chamber, be communicated with the air-inlet cavity flowed into for gas with described outlet pipe, the outlet chamber that supplied gas flows out, described air-inlet cavity and resonant cavity are communicated with by resonantron, the entrance of resonantron is in suction tude, outlet is in resonant cavity, offer the resonance micropore that has between resonant cavity and air-inlet cavity and be communicated with outlet chamber on periphery, noise-reducing silencer also comprises for the gas by air-inlet cavity and directly imports the relief tube in outlet chamber, the entrance of described relief tube in air-inlet cavity, outlet is in outlet chamber.
The entrance of described relief tube and the entrance of resonantron are spaced apart on the direction perpendicular to relief tube length, and described air-inlet cavity is provided with the inflation inlet that supplied gas flows into, and described inflation inlet is near the entrance of resonantron and away from the entrance of relief tube.
The outlet end of described inflation inlet in the coconnected suction tude of air-inlet cavity, the mouth of pipe sealing of the outlet end of described suction tude, the inflation micropore of offering on the outlet side that described inflation inlet is suction tude.
Described outlet chamber comprises front outlet chamber between resonant cavity and air-inlet cavity, in the resonant cavity rear outlet chamber of a side of air-inlet cavity dorsad, described forward and backward outlet chamber is communicated with by transition tube, and described resonance micropore is in described front outlet chamber.
The chamber wall of described outlet chamber is provided with the cotton layer of eliminating the noise.
The utility model directly is communicated with the air-inlet cavity in cylindrical shell and outlet chamber with relief tube, in use, relief tube can make the interior gas of air-inlet cavity in it flows directly into outlet chamber, be that gas in air-inlet cavity can be divided into two-part and enter outlet chamber via relief tube and resonantron respectively, to shunt the gas in air-inlet cavity by relief tube, especially the γ-ray emission in the air-inlet cavity in cylindrical shell flows when smooth, the gas be trapped in air-inlet cavity can directly flow in outlet chamber by relief tube, and discharge from outlet chamber, thereby accelerated the gas flow rate in whole noise reducing muffle, having reduced noise reduction crosses degree gas flow rate is affected.
Further, inflation inlet on air-inlet cavity is near the entrance of resonantron and away from the entrance of relief tube, thereby make from inflation inlet and flow into the entrance that gas in air-inlet cavity can preferentially flow into resonantron, when the ingress of resonantron gas occurs that flow velocity is not smooth, flow into again in relief tube, to increase as much as possible the gas flow flowed in resonantron, while avoiding gas in flowing into air-inlet cavity less, most of gas directly flows into the situation in outlet chamber from relief tube, has increased the elimination efficiency of noise-reducing silencer of the present utility model.
The accompanying drawing explanation
Fig. 1 is the structural representation of engine exhaust mechanism in embodiment of the present utility model;
Fig. 2 is the structural representation of the silencing apparatus of Fig. 1.
Embodiment
The embodiment of engine exhaust mechanism of the present utility model, as depicted in figs. 1 and 2, this engine exhaust mechanism comprises outlet pipe, the noise-reducing silencer 18 of connection between the front and rear sections 16,17 of outlet pipe be communicated with on engine exhaust port, and this noise-reducing silencer 18 consists of cylindrical shell 2, left end cap 1, right end cap 11, suction tude 3, steam outlet pipe 10, dividing plate 4, resonantron 6, relief tube 5, transition tube 8 and the cotton layer 7 of eliminating the noise.Cylindrical shell 2 extends along left and right directions, and the body of wall that cylindrical shell 2 and left and right end cap 11 surround is airtight cavity.Dividing plate 4 has three, and three dividing plates 4 are spaced apart on left and right directions in the inner chamber of cylindrical shell 2, and airtight cavity is divided into to air-inlet cavity 12, front outlet chamber 13, resonant cavity 14 and the rear outlet chamber 15 distributed successively from left to right.Resonantron 6 is communicated with air-inlet cavity 12, front outlet chamber 13 and resonant cavity 14, resonantron 6 is located on the dividing plate 4 of the leftmost side, and the entrance of resonantron 6 in air-inlet cavity 12, outlet offers the resonance micropore distributed as net shape be communicated with front outlet chamber 13 in resonant cavity 14, on the periphery of middle part.Relief tube 5 is erected on three dividing plates 4, and in outlet chamber 13 and resonant cavity 14, pass and connection air-inlet cavity 12 and rear outlet chamber 15 successively in the past, the entrance and exit of relief tube 5 is respectively in air-inlet cavity 12 and rear outlet chamber 15, and the entrance of the entrance of relief tube 5 and resonantron 6 is spaced apart.Suction tude 3 is located in the position of the enterprising air cavity 12 of sidewall of cylindrical shell 2, and be communicated with air-inlet cavity 12, offer the air inlet micropore on the part perisporium of suction tude 3 in air-inlet cavity 12, these air inlet micropores distribute as net shape on the periphery of suction tude 3 and form supplied gas and flow into the inflation inlet in air-inlet cavity 12, and the entrance that concentrates on position that the entrance of resonantron 6 is relative and resonantron 6 position of the entrance of relief tube 5 dorsad.
Described air-inlet cavity 12 is communicated with by resonantron 6 with front outlet chamber 13, resonant cavity 14 is closed chamber, front outlet chamber 13 is communicated with by transition tube 8 with rear outlet chamber 15, relief tube 5 directly is communicated with air-inlet cavity 12 and rear outlet chamber 15 simultaneously, therefore the communication path between air-inlet cavity 12 and rear outlet chamber 15 is two paths parallel with one another, namely air-inlet cavity 12 is with rear outlet chamber 15 or directly be communicated with by relief tube 5, or by resonantron 6 and transition tube 8, is communicated with successively from a left side from the right side.
Cylindrical shell 2 of the present utility model is that left end cap 1, right end cap 11 adopt the seaming edge sealing with cylindrical shell 2 respectively by the whole molding of a cold drawing, with sealing and the manufacture simplification that guarantees silencing apparatus; Dividing plate 4 (3 of quantity) is by the whole impact briquetting of cold drawing, and with relief tube 5, resonantron 6, transition tube 8 assembly weldings be an integral body, form the reactive muffling structure with resonant cavity, and can guarantee the product structure reliability; 27 of cylindrical shell 22 and internal layer cylinders are directly filled the silk floss 9 of eliminating the noise, and operate simple and easy.
In the utility model, suction tude 3 is communicated with the relief opening of motor by the leading portion 16 of outlet pipe, and steam outlet pipe 10 is communicated with the back segment 17 of outlet pipe, and during use, motor is divided into the slow-speed of revolution, high rotating speed two states according to the rotating speed difference:
During the slow-speed of revolution, the waste gas that motor produces is less, waste gas enters air-inlet cavity 12 of the present utility model by the leading portion 16 of outlet pipe through suction tude 3, when the major part of waste gas is passed through resonantron 6, under the effect of eliminating the noise in the expansion of front outlet chamber 13 and under the resonance sound deadening of resonant cavity 14, the noise be mingled with in gas in elimination, again from transition tube 8 is discharged in outlet chamber 15, again eliminate the noise of medium-high frequency under the effect of the cotton layer 9 of eliminating the noise, and eliminate the noise in conjunction with the expansion of the interlaced arrangement between transition tube 8 and outlet pipe, again eliminate the noise of low and medium frequency, finally from the back segment 17 of steam outlet pipe 10 and outlet pipe, be discharged from the utility model,
During high rotating speed, the waste gas that motor produces is more, waste gas enters air-inlet cavity 12 by leading portion 16 and the suction tude 3 of outlet pipe, when a waste gas part is passed through resonantron 6, under the effect of resonant cavity 14, resonate, eliminate the noise of high frequency, then outlet chamber 15 from transition tube 8 enters, another part directly enters rear outlet chamber 15 by relief tube 5, enter the waste gas of rear outlet chamber 15, again eliminate the noise of high frequency under the effect of the cotton layer 9 of eliminating the noise, and in conjunction with being interspersed between relief tube 5 and steam outlet pipe 10, eliminate the noise of low and medium frequency by the expansion at steam outlet pipe 10 interior gases, back segment 17 finally by steam outlet pipe 10 and outlet pipe is discharged from the utility model.
In the above-described embodiments, dividing plate has three, thereby the inner chamber of cylindrical shell is divided into to air-inlet cavity, front outlet chamber, resonant cavity and rear outlet chamber, in other embodiments, dividing plate also can be for two or more than three, when dividing plate is two, correspondence is cancelled front outlet chamber and other chambers is arranged according to the mode in documents; When dividing plate is during more than three, there is a plurality of resonant cavities and/or front outlet chamber in the inner chamber of corresponding cylindrical shell, when the right side of the resonant cavity of front outlet chamber in above-described embodiment newly increased, the right-hand member of transition tube needs the resonantron and the air-inlet cavity indirect communication that wear on the dividing plate by newly increasing.
In the above-described embodiments, suction tude penetrates air-inlet cavity from a side of cylindrical shell, be convenient to the effect of installing thereby reach, in other embodiments, suction tude also can penetrate in air-inlet cavity from front cover, in order to guarantee the expansion soundproof effect in air-inlet cavity, the port of suction tude in air-inlet cavity should distribute with other in the port interleaving in air-inlet cavity simultaneously.
The embodiment of noise-reducing silencer of the present utility model: in the present embodiment, the structure of noise-reducing silencer is identical with the structure of noise-reducing silencer in above-described embodiment, therefore repeats no more.
In addition, in other embodiments, this noise-reducing silencer also can be applied on the devices such as other vehicles of engineering vehicle, car or train etc. or air compressor, boiler.
Claims (10)
1. a noise-reducing silencer, comprise that two-port is by the canular cylindrical shell of end cap shutoff, the inner chamber of described cylindrical shell is split at least three chambers spaced apart, there is resonant cavity in each chamber, the air-inlet cavity that supplied gas flows into, the outlet chamber that supplied gas flows out, described air-inlet cavity and resonant cavity are communicated with by resonantron, the entrance of resonantron is in suction tude, outlet is in resonant cavity, offer the resonance micropore that has between resonant cavity and air-inlet cavity and be communicated with outlet chamber on periphery, it is characterized in that, also comprise for the gas by air-inlet cavity and directly import the relief tube in outlet chamber, the entrance of described relief tube is in air-inlet cavity, outlet is in outlet chamber.
2. noise-reducing silencer according to claim 1, it is characterized in that, the entrance of described relief tube and the entrance of resonantron are spaced apart on the direction perpendicular to relief tube length, described air-inlet cavity is provided with the inflation inlet that supplied gas flows into, and described inflation inlet is near the entrance of resonantron and away from the entrance of relief tube.
3. noise-reducing silencer according to claim 2, is characterized in that, the outlet end of described inflation inlet in the coconnected suction tude of air-inlet cavity, the mouth of pipe sealing of the outlet end of described suction tude, the inflation micropore of offering on the outlet side that described inflation inlet is suction tude.
4. according to claim 1 or 2 or 3 described noise-reducing silencers, it is characterized in that, described outlet chamber comprises front outlet chamber between resonant cavity and air-inlet cavity, in the resonant cavity rear outlet chamber of a side of air-inlet cavity dorsad, described forward and backward outlet chamber is communicated with by transition tube, and described resonance micropore is in described front outlet chamber.
5. according to claim 1 or 2 or 3 described noise-reducing silencers, it is characterized in that, the chamber wall of described outlet chamber is provided with the cotton layer of eliminating the noise.
6. an engine exhaust mechanism, comprise outlet pipe and the coconnected noise-reducing silencer of outlet pipe for discharging motor exhaust, described noise-reducing silencer comprises that two-port is by the canular cylindrical shell of end cap shutoff, the inner chamber of described cylindrical shell is split at least three chambers spaced apart, there is resonant cavity in each chamber, be communicated with the air-inlet cavity flowed into for gas with described outlet pipe, the outlet chamber that supplied gas flows out, described air-inlet cavity and resonant cavity are communicated with by resonantron, the entrance of resonantron is in suction tude, outlet is in resonant cavity, offer the resonance micropore that has between resonant cavity and air-inlet cavity and be communicated with outlet chamber on periphery, it is characterized in that, described noise-reducing silencer also comprises for the gas by air-inlet cavity and directly imports the relief tube in outlet chamber, the entrance of described relief tube is in air-inlet cavity, outlet is in outlet chamber.
7. engine exhaust mechanism according to claim 6, it is characterized in that, the entrance of described relief tube and the entrance of resonantron are spaced apart on the direction perpendicular to relief tube length, described air-inlet cavity is provided with the inflation inlet that supplied gas flows into, and described inflation inlet is near the entrance of resonantron and away from the entrance of relief tube.
8. engine exhaust mechanism according to claim 7, it is characterized in that, the outlet end of described inflation inlet in the coconnected suction tude of air-inlet cavity, the mouth of pipe sealing of the outlet end of described suction tude, the inflation micropore of offering on the outlet side that described inflation inlet is suction tude.
9. according to claim 6 or 7 or 8 described engine exhaust mechanisms, it is characterized in that, described outlet chamber comprises front outlet chamber between resonant cavity and air-inlet cavity, in the resonant cavity rear outlet chamber of a side of air-inlet cavity dorsad, described forward and backward outlet chamber is communicated with by transition tube, and described resonance micropore is in described front outlet chamber.
10. according to claim 6 or 7 or 8 described engine exhaust mechanisms, it is characterized in that, the chamber wall of described outlet chamber is provided with the cotton layer of eliminating the noise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203276809U CN203335193U (en) | 2013-06-07 | 2013-06-07 | Noise-reducing silencer and engine exhaust structure using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203276809U CN203335193U (en) | 2013-06-07 | 2013-06-07 | Noise-reducing silencer and engine exhaust structure using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203335193U true CN203335193U (en) | 2013-12-11 |
Family
ID=49703870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203276809U Expired - Fee Related CN203335193U (en) | 2013-06-07 | 2013-06-07 | Noise-reducing silencer and engine exhaust structure using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203335193U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675478A (en) * | 2015-03-11 | 2015-06-03 | 河南柴油机重工有限责任公司 | Exhaust muffler for box type generating unit |
| CN106321193A (en) * | 2016-10-25 | 2017-01-11 | 力帆实业(集团)股份有限公司 | Rear silencer of sedan |
| CN118128623A (en) * | 2024-04-30 | 2024-06-04 | 江苏慧海机械科技有限公司 | Mars extinction silencer with resonant cavity |
-
2013
- 2013-06-07 CN CN2013203276809U patent/CN203335193U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675478A (en) * | 2015-03-11 | 2015-06-03 | 河南柴油机重工有限责任公司 | Exhaust muffler for box type generating unit |
| CN106321193A (en) * | 2016-10-25 | 2017-01-11 | 力帆实业(集团)股份有限公司 | Rear silencer of sedan |
| CN118128623A (en) * | 2024-04-30 | 2024-06-04 | 江苏慧海机械科技有限公司 | Mars extinction silencer with resonant cavity |
| CN118128623B (en) * | 2024-04-30 | 2024-07-19 | 江苏慧海机械科技有限公司 | Mars extinction silencer with resonant cavity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202431336U (en) | Automotive exhaust silencer | |
| CN110030061B (en) | Exhaust silencer of racing car | |
| CN201502422U (en) | Automobile muffler | |
| KR200453213Y1 (en) | Sub muffler structure for vehicles with maximum displacement | |
| CN202417651U (en) | Exhaust silencer of automobile | |
| CN204716333U (en) | Multi-cavity resonance exhaust silencer | |
| CN201202514Y (en) | Automobile silencer | |
| CN201802458U (en) | Pressure-stabilizing mixed-flow type exhaust purification muffler | |
| CN209604120U (en) | An automobile air intake pipe noise reduction structure | |
| CN106321193A (en) | Rear silencer of sedan | |
| CN202732058U (en) | Automobile muffler | |
| CN203547838U (en) | Multi-core resonant type silencer | |
| CN210049945U (en) | Silencer | |
| CN102392717A (en) | Automobile silencer with five chambers | |
| CN201377347Y (en) | Multi-cavity labyrinth dissipation muffler | |
| CN201412209Y (en) | Automobile silencer | |
| CN201539296U (en) | Resistant vehicle exhaust gas silencer | |
| CN213510797U (en) | Multi-cavity resonance composite muffler | |
| CN105569772A (en) | Silencer of exhaust system of motorcycle | |
| CN210948839U (en) | Combined automobile silencing exhaust pipe structure | |
| CN201173143Y (en) | Low noise automobile exhaust silencer | |
| CN101694172A (en) | Automobile muffler for reducing exhaust back pressure | |
| CN102359407A (en) | Multi-cavity labyrinth silencer | |
| CN205135753U (en) | Novel vehicle energy saving exhaust muffler device | |
| CN204552887U (en) | A kind of porous jet-type silencing apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20170607 |