CN105569775B - Exhaust silencer and with its vehicle - Google Patents
Exhaust silencer and with its vehicle Download PDFInfo
- Publication number
- CN105569775B CN105569775B CN201610128995.9A CN201610128995A CN105569775B CN 105569775 B CN105569775 B CN 105569775B CN 201610128995 A CN201610128995 A CN 201610128995A CN 105569775 B CN105569775 B CN 105569775B
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- China
- Prior art keywords
- hole
- exhaust
- noise elimination
- exhaust pipe
- pipe
- 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.)
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Classifications
-
- 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
- F01N1/082—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
-
- 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
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/02—Tubes being perforated
- F01N2470/04—Tubes being perforated characterised by shape, disposition or dimensions of apertures
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
A kind of exhaust silencer, including suppressor case, first partition, downtake pipe and second exhaust pipe, suppressor case is divided into the first noise elimination cavity and the second noise elimination cavity by first partition, downtake pipe is located at the first noise elimination cavity, second exhaust pipe is socketed on downtake pipe, and it can be slided along the axis direction of downtake pipe, one section of socket region is formed between downtake pipe and second exhaust pipe, the one end of second exhaust pipe far from socket region is stretched into the second noise elimination cavity, second exhaust pipe is located at the end part seal of one end in the second noise elimination cavity, and pass through elastic component and be connected with exhaust silencer, in downtake pipe and second exhaust pipe relative to being respectively equipped with the second through-hole and third through-hole on the tube wall at socket region, it is located on the tube wall in the second noise elimination cavity in second exhaust pipe and is equipped with fourth hole.The present invention can change first through hole and the overlapping area of the second through-hole according to the size of air-flow, so as to automatically adjust frequency of noise elimination, have preferable noise elimination effect.
Description
Technical field
The present invention relates to technical field of vehicle, especially a kind of exhaust silencer and with its vehicle.
Background technology
Automobile exhaust system is the important component of automobile, and exhaust system can also make an uproar burning while exhaust gas is discharged
Vocal cords are to vehicle tail, this allows for vehicle tail and produces the very high order noise and frictional noise of sound pressure level, and noise transmits
To crew module, it is possible to which can encourage the spectrogram parameter of crew module causes crew module's operatic tunes to resonate, and seriously affects the NVH of vehicle
(Noise, Vibration, Harshness noise, vibration, sound vibration roughness).With the improvement of living standards, people are to vehicle
Requirement become comfortable household requisites from initial walking-replacing tool, so consumer in addition to the requirement of the dynamic property of vehicle compared with
Also higher and higher to the noise requirements of vehicle except stringent, vehicle must all have in traveling, acceleration, idling more pacifies
Quiet noise.
The silencer in major part low and middle-end vehicle accumulates immutable silencer for flow area at present, during silencer is eliminated the noise
Frequency of heart is fixed, and when being increased with engine speed, noise frequency raising, silencer noise elimination effect reduces；Only small part is high
It holding using the silencer that frequency of noise elimination is variable on vehicle, Fig. 1 is the structure diagram of frequency of noise elimination variable muffler in the prior art,
As shown in Figure 1, the silencer includes muffler tail pipe 111, end cap 112 and torsionspring 113, end cap 112 is located at silencer
The exit of exhaust pipe 111, and pass through torsionspring 113 and be connected with muffler tail pipe 111, when the engine is not operating,
111 interior air-flow speed of muffler tail pipe is zero, at this point, end cap 112 gets lodged in muffler tail pipe in the effect of torsionspring 113
On 111, when the engine operates, air-flow is flowed along muffler tail pipe 111, the end cap 112 of closing originally is reopened, with hair
The rotating speed of motivation increases, capacity increase, air velocity increase, and the power being subject on end cap 112 can also increase, and end cap 112 is located at
Aperture at 111 gas outlet of muffler tail pipe also can be increasing, and the sectional area of air-flow becomes larger, thus the noise elimination of silencer
Frequency also becomes larger therewith.
Only there are one holes for the exhaust pipe of the variable silencer of frequency of noise elimination in the prior art, i.e., only can there are one the area in hole
To change, and then frequency of noise elimination is adjusted, preferable noise elimination effect is not achieved.
Invention content
The purpose of the present invention is to provide a kind of exhaust silencer and with its vehicle, which has multiple
The adjustable gas vent of sectional area can automatically adjust frequency of noise elimination according to the situation of engine, have preferable noise elimination effect.
The present invention provides a kind of exhaust silencer, including suppressor case, first partition, downtake pipe and second exhaust
The suppressor case is divided into the first noise elimination cavity and the second noise elimination cavity by pipe, the first partition, and the downtake pipe is located at
First noise elimination cavity, the second exhaust pipe are socketed on the downtake pipe, and can be along the axis of the downtake pipe
Line direction is slided, and one section of socket region overlapped is formed between the downtake pipe and the second exhaust pipe, described
The one end of second exhaust pipe far from the socket region is stretched into second noise elimination cavity, and the second exhaust pipe is located at described the
The end part seal of one end in two noise elimination cavities, and pass through elastic component and be connected with the exhaust silencer, in the downtake pipe
And the second exhaust pipe relative to it is described socket region at tube wall on be respectively equipped with the second through-hole and third through-hole, described
The tube wall that second exhaust pipe is located in second noise elimination cavity is equipped with fourth hole.
Further, the outer wall of the second exhaust pipe be equipped with first baffle and second baffle, the first baffle and
The second baffle is located at the both sides of the first partition respectively.
Further, second through-hole and the third through-hole are multiple, and respectively along the downtake pipe and
The axial direction of the second exhaust pipe is laid, and second through-hole is identical with the shape of the third through-hole.
Further, when the second exhaust pipe is in unstretched condition, in the socket region, second through-hole
It is arranged at intervals with the third through-hole, second through-hole and the third through-hole are completely misaligned, when the second exhaust pipe
During in the fully extended state, in the socket region, second through-hole is completely superposed with the third through-hole.
Further, second through-hole and the third through-hole are waist-shaped hole.
Further, the distance of two adjacent the second through-holes is greater than or equal to the length of the third through-hole, adjacent
The distance of two third through-holes is greater than or equal to the length of second through-hole.
Further, cushioning piece is equipped between the first baffle and the second baffle and the first partition,
Damping net is additionally provided between the second baffle and the first partition.
Further, the 5th is additionally provided on the tube wall of one end far from the socket region on the downtake pipe to lead to
Hole.
Further, the exhaust silencer further includes second partition, the first partition and the second partition by institute
It states suppressor case and is divided into first noise elimination cavity, second noise elimination cavity and third noise elimination cavity, set on the third noise elimination cavity
There is first through hole, the elastic component is set between the end of the second partition and the second exhaust pipe.
The present invention also provides a kind of vehicles, have exhaust silencer provided by the invention.
In conclusion the present invention by first partition, downtake pipe, second exhaust pipe, first through hole, the second through-hole and
The setting of elastic component can change first through hole and the overlapping area of the second through-hole, so as to make the exhaust according to the size of air-flow
Silencer have the adjustable gas vent of multiple sectional areas, can according to the situation of engine automatically adjust frequency of noise elimination, have compared with
Good noise elimination effect.
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow the above and other objects, features and advantages of the present invention can
It is clearer and more comprehensible, special below to lift preferred embodiment, and coordinate attached drawing, detailed description are as follows.
Description of the drawings
Fig. 1 is the structure diagram of frequency of noise elimination variable muffler in the prior art
Fig. 2 is the structure diagram of exhaust silencer provided in an embodiment of the present invention.
Fig. 3 is the front view of exhaust silencer in Fig. 1.
Fig. 4 is the structural exploded view of exhaust silencer in Fig. 1.
Fig. 5 is the schematic cross-section that second exhaust pipe is in contraction state in Fig. 1.
Fig. 6 is the schematic cross-section that second exhaust pipe is in extended configuration in Fig. 1.
Specific embodiment
The technological means and effect taken further to illustrate the present invention to reach predetermined goal of the invention, below in conjunction with
Attached drawing and preferred embodiment, it is as follows that the present invention is described in detail.
The present invention provides a kind of exhaust silencer, and Fig. 2 is the structural representation of exhaust silencer provided in an embodiment of the present invention
Figure, Fig. 3 are the front view of exhaust silencer in Fig. 1, and Fig. 4 is the structural exploded view of exhaust silencer in Fig. 1, such as Fig. 2 to Fig. 4 institutes
Show, which includes suppressor case 10, first partition 21, second partition 22, downtake pipe 31 and second exhaust
Pipe 32.
First partition 21 and second partition 22 successively divide suppressor case 10 for the first noise elimination cavity 41, the second noise elimination cavity 42
And third noise elimination cavity 43, first through hole 221 is equipped on second partition 22, the air-flow in the second noise elimination cavity 42 can pass through first
Through-hole 221 enters in third noise elimination cavity 43, and outlet is equipped with positioned at the end of 43 side of third noise elimination cavity on suppressor case 10
Mouth 11.
Downtake pipe 31 is fixed on suppressor case 10 and is located at the end of 41 side of the first noise elimination cavity, and be communicated in noise elimination
Between 10 outside of device housing and the first noise elimination cavity 41, second exhaust pipe 32 is socketed on downtake pipe 31, and can be along first row
The axis direction of tracheae 31 slides, and one section of socket region overlapped is formed between downtake pipe 31 and second exhaust pipe 32
(see downtake pipe in Fig. 4 and Fig. 5 and second exhaust pipe lap), the one end of second exhaust pipe 32 far from socket region are stretched
Enter in the second noise elimination cavity 42, second exhaust pipe 32 is located at the end part seal of one end in the second noise elimination cavity 42, and passes through elasticity
Part 50 such as spring, is connected with exhaust silencer.In the present embodiment, elastic component 50 is set on the end and the of second exhaust pipe 32
Between two partition boards 22.Second exhaust pipe 32 relative to downtake pipe 31 can be done and stretch under the action of air-flow and elastic component 50
Movement is shunk and (is moved to the increased direction of socket zone length) in exhibition (direction reduced to socket zone length moves).
In downtake pipe 31 and second exhaust pipe 32 relative to being respectively equipped with the second through-hole 311 and the on the tube wall at socket region
Three through-holes 321 are located on the tube wall in the second noise elimination cavity 42 in second exhaust pipe 32 and are equipped with fourth hole 322, in first exhaust
The tube wall of one end far from socket region on pipe 31 is equipped with fifth hole 312.
In the present embodiment, the second through-hole 311 and third through-hole 321 are multiple, and respectively along downtake pipe 31 and
The axial direction of second exhaust pipe 32 is laid, and the second through-hole 311 is equal with the shape of third through-hole 321.
Specifically, the second through-hole 311 and third through-hole 321 all can be waist-shaped hole, adjacent two the second through-holes 311
Distance is greater than or equal to the length of third through-hole 321, and the distance of adjacent two third through-holes 321 is greater than or equal to second and leads to
The length in hole 311.When second exhaust pipe 32 is in unstretched condition, in socket region, the second through-hole 311 and third through-hole
321 are arranged at intervals, and the second through-hole 311 is completely misaligned with third through-hole 321, i.e., every one second through-hole 311 is set on adjacent two
Between a third through-hole 321, each third through-hole 321 is set between two adjacent the second through-holes 311.
First baffle 323 and second baffle 324, first baffle 323 and are additionally provided on the outer wall of second exhaust pipe 32
Two baffles 324 are located at the both sides of first partition 21 respectively, and second can be prevented when first baffle 323 is contacted with first partition 21
Exhaust pipe 32 continues to stretch under the action of air-flow and elastic component 50, can be with when second baffle 324 is contacted with first partition 21
Second exhaust pipe 32 is prevented to continue to shrink under the action of air-flow and elastic component 50, i.e., first baffle 323 can with second baffle 324
So that second exhaust pipe 32 can only move in a certain range.In the present embodiment, the movable distance of second exhaust pipe 32 should
Not less than the length of 221 and second through-hole 311 of first through hole, i.e., when second baffle 324 is contacted with first partition 21, second row
Tracheae 32 is in fully collapsed condition, and the second through-hole 311 is completely misaligned with third through-hole 321, when first baffle 323 and first
When partition board 21 contacts, second exhaust pipe 32 is in the fully extended state, and the second through-hole 311 is completely superposed with third through-hole 321.
Further, cushioning piece 325 is equipped between first baffle 323 and second baffle 324 and first partition 21,
Damping net 326 is additionally provided between second baffle 324 and first partition 21.
Fig. 5 is the schematic cross-section that second exhaust pipe is in contraction state in Fig. 1, and Fig. 6 is that second exhaust pipe is in Fig. 1
The schematic cross-section of extended configuration, as shown in Figures 5 and 6, when off-gas flows are without exhaust silencer provided by the invention,
Second exhaust pipe 32 is in contraction state, and second baffle 324 is resisted against in first partition 21, when air-flow is from downtake pipe 31
During into silencer, a part of air-flow enters the first noise elimination cavity 41 from fifth hole 312, and acoustic energy is another by weakening for the first time
Fraction enters second exhaust pipe 32, is then discharged from the fourth hole 322 on second exhaust pipe 32, and acoustic energy passes through second
Secondary weakening.Due to the end seal of second exhaust pipe 32, under the action of the gas of second exhaust pipe 32 is entered, second exhaust pipe
32 compression elastic pieces 50, and start to do stretching routine (i.e. moving upward in Fig. 4 and Fig. 5) to 22 direction of second partition, make original
This second misaligned through-hole 311 starts to overlap with third through-hole 321, and air-flow passes through the second through-hole 311 and third through-hole 321
Intersection enters the first noise elimination cavity 41, the intersection and the first noise elimination cavity 41 1 of the second through-hole 311 and third through-hole 321
It rises and forms a resonant cavity, since the second through-hole 311 is overlapped with third through-hole 321 at this time area is smaller and the first noise elimination cavity
41 constancy of volume, at this time silencer have preferable noise elimination effect to low-frequency noise；As engine speed increases, air-flow and
The increase of noise frequency also therewith, air-flow continue to press on second exhaust pipe 32 and are moved to 22 direction of second partition, the second through-hole 311
Constantly increase with the overlapping area of third through-hole 321, when first baffle 323 is abutted in first partition 21, second exhaust pipe 32
During in extended configuration, in socket region, the second through-hole 311 is completely superposed with third through-hole 321, due to when air-flow increases the
The overlapping area of two through-holes 311 and third through-hole 321 also constantly increases, therefore, can have at this time to the noise of upper frequency compared with
Good noise elimination effect.
The present invention also provides a kind of vehicles, have above-mentioned exhaust silencer, about the other feature of the automobile, please join
See the prior art, details are not described herein.
In conclusion the present invention by first partition, downtake pipe, second exhaust pipe, first through hole, the second through-hole and
The setting of elastic component can change first through hole and the overlapping area of the second through-hole, so as to make the exhaust according to the size of air-flow
Silencer have the adjustable gas vent of multiple sectional areas, can according to the situation of engine automatically adjust frequency of noise elimination, have compared with
Good noise elimination effect.
The above described is only a preferred embodiment of the present invention, not make limitation in any form to the present invention, though
So the present invention is disclosed above with preferred embodiment, however is not limited to the present invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, as long as being without departing from technical solution of the present invention content, technical spirit pair according to the present invention
Any simple modification, equivalent change and modification that above example is made, in the range of still falling within technical solution of the present invention.
Claims (10)
1. a kind of exhaust silencer, it is characterised in that：Including suppressor case (10), first partition (21), downtake pipe
(31) and second exhaust pipe (32), the first partition (21) by the suppressor case (10) be divided into the first noise elimination cavity (41) and
Second noise elimination cavity (42), the downtake pipe (31) is positioned at first noise elimination cavity (41), second exhaust pipe (32) set
It is connected on the downtake pipe (31), and can be slided along the axis direction of the downtake pipe (31), the first exhaust
It manages and one section of socket region overlapped is formed between (31) and the second exhaust pipe (32), the second exhaust pipe (32) is remote
One end from the socket region is stretched into second noise elimination cavity (42), and the second exhaust pipe (32) disappears positioned at described second
The end part seal of one end in the operatic tunes (42), and pass through elastic component (50) and be connected with the exhaust silencer, in the first row
Tracheae (31) and the second exhaust pipe (32) on the tube wall at the socket region relative to being respectively equipped with the second through-hole (311)
And third through-hole (321), the 4th is equipped on the tube wall in second noise elimination cavity (42) in the second exhaust pipe (32)
Through-hole (322).
2. exhaust silencer according to claim 1, it is characterised in that：The outer wall of the second exhaust pipe (32) is equipped with
First baffle (323) and second baffle (324), the first baffle (323) and the second baffle (324) are located at described respectively
The both sides of first partition (21).
3. exhaust silencer according to claim 2, it is characterised in that：Second through-hole (311) is led to the third
Hole (321) is multiple, and is laid respectively along the axial direction of the downtake pipe (31) and the second exhaust pipe (32),
Second through-hole (311) is identical with the shape of the third through-hole (321).
4. exhaust silencer according to claim 3, it is characterised in that：When the second exhaust pipe (32) is in un-extended
During state, in the socket region, second through-hole (311) is arranged at intervals with the third through-hole (321), and described second is logical
Hole (311) is completely misaligned with the third through-hole (321), when the second exhaust pipe (32) is in the fully extended state,
In the socket region, second through-hole (311) is completely superposed with the third through-hole (321).
5. exhaust silencer according to claim 3, it is characterised in that：Second through-hole (311) is led to the third
Hole (321) is waist-shaped hole.
6. exhaust silencer according to claim 5, it is characterised in that：The distance of two adjacent the second through-holes (311)
More than or equal to the length of the third through-hole (321), the distance of adjacent two third through-holes (321) is more than or equal to described
The length of second through-hole (311).
7. exhaust silencer according to claim 2, it is characterised in that：The first baffle (323) and the second gear
Cushioning piece (325), the second baffle (324) and described first are equipped between plate (324) and the first partition (21)
Damping net (326) is additionally provided between partition board (21).
8. exhaust silencer according to claim 1, it is characterised in that：Far from described on the downtake pipe (31)
It is socketed on the tube wall of the one end in region and is additionally provided with fifth hole (312).
9. exhaust silencer according to claim 1, it is characterised in that：The exhaust silencer further includes second partition
(22), the suppressor case (10) is divided into first noise elimination cavity by the first partition (21) with the second partition (22)
(41), second noise elimination cavity (42) and third noise elimination cavity (43), the third noise elimination cavity (43) are equipped with first through hole
(221), the elastic component (50) is set between the end of the second partition (22) and the second exhaust pipe (32).
10. a kind of vehicle, it is characterised in that：Including exhaust silencer as in one of claimed in any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610128995.9A CN105569775B (en) | 2016-03-07 | 2016-03-07 | Exhaust silencer and with its vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610128995.9A CN105569775B (en) | 2016-03-07 | 2016-03-07 | Exhaust silencer and with its vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105569775A CN105569775A (en) | 2016-05-11 |
| CN105569775B true CN105569775B (en) | 2018-06-19 |
Family
ID=55880321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610128995.9A Active CN105569775B (en) | 2016-03-07 | 2016-03-07 | Exhaust silencer and with its vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105569775B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499465A (en) * | 2016-11-11 | 2017-03-15 | 成都陵川特种工业有限责任公司 | It is based on aerodynamic noise reduction improved structure |
| CN107288786B (en) * | 2017-06-16 | 2019-05-21 | 上海斯瑞佛汽车零部件有限公司 | A kind of air inlet pipe and the silencer using the air inlet pipe |
| CN107731216A (en) * | 2017-11-15 | 2018-02-23 | 苏州岸肯电子科技有限公司 | A kind of drawing and pulling type silencer |
| CN109083726B (en) * | 2018-08-16 | 2020-03-27 | 厦门理工学院 | Multi-mode automobile muffler |
| CN110686398B (en) * | 2019-09-25 | 2020-11-24 | 珠海格力电器股份有限公司 | Silencer with adjustable length and system pressure capable of being automatically adapted and air conditioner |
| CN115013624B (en) * | 2022-05-31 | 2023-09-08 | 中国船舶重工集团公司第七一九研究所 | Pressure reducing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190827340A (en) * | 1908-01-02 | 1909-06-03 | Pierre Ajasson De Grandsagne | Silencer for Explosion Engines. |
| US5477015A (en) * | 1991-05-03 | 1995-12-19 | Maremont Corporation | Vehicular muffler with improved mechanical lock joints |
| US6332510B1 (en) * | 1996-09-30 | 2001-12-25 | Silentor Holding A/S | Gas flow silencer |
| US6913112B2 (en) * | 2003-02-05 | 2005-07-05 | Arvin Technologies, Inc. | Noise attenuation assembly |
| CN203906048U (en) * | 2014-05-08 | 2014-10-29 | 北汽福田汽车股份有限公司 | Exhaust silencer for test vehicle |
| CN105156176A (en) * | 2014-06-04 | 2015-12-16 | 埃贝赫排气技术股份有限公司 | Muffler |
| CN204900194U (en) * | 2015-07-16 | 2015-12-23 | 上海齐耀螺杆机械有限公司 | Anti formula muffler of adjustable cavity length |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5776220A (en) * | 1980-10-29 | 1982-05-13 | Nippon Radiator Co Ltd | Muffler |
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2016
- 2016-03-07 CN CN201610128995.9A patent/CN105569775B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190827340A (en) * | 1908-01-02 | 1909-06-03 | Pierre Ajasson De Grandsagne | Silencer for Explosion Engines. |
| US5477015A (en) * | 1991-05-03 | 1995-12-19 | Maremont Corporation | Vehicular muffler with improved mechanical lock joints |
| US6332510B1 (en) * | 1996-09-30 | 2001-12-25 | Silentor Holding A/S | Gas flow silencer |
| US6913112B2 (en) * | 2003-02-05 | 2005-07-05 | Arvin Technologies, Inc. | Noise attenuation assembly |
| CN203906048U (en) * | 2014-05-08 | 2014-10-29 | 北汽福田汽车股份有限公司 | Exhaust silencer for test vehicle |
| CN105156176A (en) * | 2014-06-04 | 2015-12-16 | 埃贝赫排气技术股份有限公司 | Muffler |
| CN204900194U (en) * | 2015-07-16 | 2015-12-23 | 上海齐耀螺杆机械有限公司 | Anti formula muffler of adjustable cavity length |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105569775A (en) | 2016-05-11 |
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