CN104153862B - A kind of low noise automotive muffler - Google Patents
A kind of low noise automotive muffler Download PDFInfo
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- CN104153862B CN104153862B CN201410099801.8A CN201410099801A CN104153862B CN 104153862 B CN104153862 B CN 104153862B CN 201410099801 A CN201410099801 A CN 201410099801A CN 104153862 B CN104153862 B CN 104153862B
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- 230000001154 acute effect Effects 0.000 claims abstract description 52
- 230000030279 gene silencing Effects 0.000 claims abstract description 33
- 238000003379 elimination reaction Methods 0.000 claims description 14
- 230000008030 elimination Effects 0.000 claims description 13
- 240000005528 Arctium lappa Species 0.000 claims description 11
- 238000010276 construction Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 18
- 238000001228 spectrum Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
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Abstract
The invention discloses a kind of low noise automotive muffler, open and flat of rectangular silencing pot, open and flat of silencing pot is provided with several two-door window openings, two-door window opening includes the sound hole excessively of the rectangle being arranged on open and flat of silencing pot, cross sound hole and be provided with crossbeam, the axis of crossbeam and the line coincident crossing sound hole relative edge midpoint, crossbeam both sides are connected to wing plate A and wing plate B, crossbeam is divided into two through holes of homalographic and symmetry by crossing sound hole, acute angle A is constituted between wing plate A and open and flat of silencing pot, acute angle B is constituted between wing plate B and open and flat of silencing pot, the area of wing plate A is equal to crossing soundhole region area on the left of crossbeam, the area of wing plate B is equal to crossing soundhole region area on the right side of crossbeam.The invention has the beneficial effects as follows: simple in construction, anti-noise ability is strong.
Description
Technical field
The present invention relates to automotive silencing field, specifically: a kind of low noise automotive muffler.
Background technology
Silencing pot end-cap assembly, as the significant components of automobile silencing, existing structure is mainly made up of silencing pot and end cap, and wherein, silencing pot is provided with the circle of uniformly arrangement and crosses sound hole, and end cap is slab construction.After above-mentioned hush pipe is used in Alto car, it is possible to attenuating noise, when the original output noise of electromotor is 95 decibels, after the noise reduction after silencing pot end-cap assembly processes, its output 73.58 decibels, its noise is still bigger.
Summary of the invention
The technical problem to be solved is to arrange a kind of low noise automotive muffler that a kind of noise reduction value is big.
This invention address that the problems referred to above be the technical scheme is that a kind of low noise automotive muffler, including the first noise reduction chamber being sequentially connected with, second noise reduction chamber, 3rd noise reduction chamber, give vent to anger termination, first silencing cavity indoor are provided with the second mozzle, introduce after noise elimination gas extends into the second mozzle by the first mozzle, first noise reduction chamber passes through the 3rd mozzle and the second noise reduction chamber, second noise reduction chamber passes through the 4th mozzle and the 3rd noise reduction chamber, 3rd noise reduction chamber connects with external environment condition after running through, by the 5th mozzle, termination of giving vent to anger；Second mozzle is the cylinder that front-end and back-end are all closed, and the second mozzle is by being arranged on some air passing holes and the first noise reduction chamber of self outer wall；It is Guan Bi end that 3rd mozzle is positioned at one end of the first noise reduction chamber, and the 4th mozzle and the 5th mozzle are positioned at one end of the 3rd noise reduction chamber and are blind end；
5th mozzle, 4th mozzle, open and flat of the silencing pot that 3rd mozzle is all rectangular after flattening, open and flat of silencing pot is provided with several two-door window openings, two-door window opening includes the sound hole excessively of the rectangle being arranged on open and flat of silencing pot, cross sound hole and be provided with crossbeam, the axis of crossbeam and the line coincident crossing sound hole relative edge midpoint, crossbeam both sides are connected to wing plate A and wing plate B, crossbeam is divided into two through holes of homalographic and symmetry by crossing sound hole, acute angle A is constituted between wing plate A and open and flat of silencing pot, acute angle B is constituted between wing plate B and open and flat of silencing pot, the area of wing plate A is equal to crossing soundhole region area on the left of crossbeam, the area of wing plate B is equal to crossing soundhole region area on the right side of crossbeam；
It is M district that 3rd mozzle is provided with the region of two-door window opening, it is indoor that M district is positioned at the first silencing cavity, it is N district that 4th mozzle is provided with the region of two-door window opening, it is indoor that N district is positioned at the 3rd silencing cavity, it is X district that 5th mozzle is provided with the region of two-door window opening, it is indoor that X district is positioned at the 3rd silencing cavity, wherein the wing plate A and wing plate B of the 3rd mozzle is positioned at inside the 3rd mozzle pipe, the wing plate A and wing plate B of the 5th mozzle are positioned at inside the 5th mozzle pipe, and the wing plate A and wing plate B of the 4th mozzle are positioned at inside the 4th mozzle pipe.
Typical round crosses the noise-cancelling theory of sound hole: the structure of micropole diffusor is the straight tube of an endcapped, and tube wall is drilled with a lot of aperture.The principle of micropole diffusor is with the frequency spectrum of jet noise for foundation, if the gross area of maintenance spout is constant and replaces with a lot of little spouts, when air-flow is through small holes, the frequency spectrum of jet noise will shift to high frequency or hyperfrequency, the audible sound composition in frequency spectrum is made substantially to reduce, thus reducing the interference to people and injury.
The design of the present invention is: change traditional circular hole into rectangular opening, crossbeam is utilized to intercept into 2 symmetrical through holes by crossing sound hole, and utilize wing plate A and wing plate B to form sound wave obstruct break-in, cross between sound hole at adjacent two, propagate to adjacent sound hole direction of crossing under the guide effect of wing plate A and wing plate B from the sound wave crossing sound hole outflow, final weakening mutually, reaches the purpose of noise reduction.Under the same conditions, being that sound hole structure is different, the present invention compares the sound hole excessively of typical round structure, and when being separately provided the 5th mozzle or the 4th mozzle or three mozzles, the noise reduction index of the present invention can control at 51.5-68.4 decibel interval.
Preferably, wing plate A and wing plate B is rectangle.
The angle of acute angle A is equal to 20 degree or 30 degree or 40 degree or 50 degree or 60 degree or 70 degree, and the angle of acute angle B is equal to 20 degree or 30 degree or 40 degree or 50 degree or 60 degree or 70 degree.
Through above-mentioned experiment, the present invention is preferred, and when the angle of acute angle A is equal to 30 degree, the angle of acute angle B is equal to 30 degree.
Preferably, the angle of acute angle A is equal to acute angle B.
Further, every three two-door window openings rearrange the two-door window opening group of column according to yi word pattern, every three column two-door window opening groups are according to the row arrangement composition two-door window opening group of determinant, the column direction of being expert at of the two-door window opening group of two column separately flushes arrangement, all two-door window opening group dislocation arrangements with the column of both sides of centrally located column two-door window opening group.
Second silencing cavity indoor are additionally provided with sound gobo, and sound gobo is between the 4th mozzle and the 3rd mozzle.
The axis of the 5th mozzle and the axis angle of the 4th mozzle are angle P, the span of angle P 20 degree to 70 degree.
nullThrough experiment，When being separately provided the 5th mozzle or the 4th mozzle or three mozzles，And when the angle of acute angle A is equal to 20 degree、When the angle of acute angle B is equal to 20 degree，The noise reduction index of the present invention can control at 57.5 decibels，Through experiment，When the angle of acute angle A is equal to 30 degree、When the angle of acute angle B is equal to 30 degree，The noise reduction index of the present invention can control at 51.5 decibels，Through experiment，When the angle of acute angle A is equal to 20 degree、When the angle of acute angle B is equal to 20 degree，The noise reduction index of the present invention can control at 57 decibels，Through experiment，When the angle of acute angle A is equal to 40 degree、When the angle of acute angle B is equal to 40 degree，The noise reduction index of the present invention can control at 60.4 decibels，Through experiment，When the angle of acute angle A is equal to 50 degree、When the angle of acute angle B is equal to 50 degree，The noise reduction index of the present invention can control at 64 decibels，Through experiment，When the angle of acute angle A is equal to 60 degree、When the angle of acute angle B is equal to 60 degree，The noise reduction index of the present invention can control at 65.8 decibels，Through experiment，When the angle of acute angle A is equal to 70 degree、When the angle of acute angle B is equal to 70 degree，The noise reduction index of the present invention can control at 68.4 decibels.
Through experiment, after 5th mozzle, the first mozzle, the second mozzle, the first noise reduction chamber, the 3rd mozzle, the second noise reduction chamber, sound gobo, the 4th mozzle, the 3rd noise reduction chamber, termination of giving vent to anger are combined according to said structure, it is possible to control noise output is interval at 41.7-52.1 decibel.
To sum up, the invention has the beneficial effects as follows: simple in construction, anti-noise ability is strong.
Accompanying drawing explanation
Fig. 1 is the front view for open and flat of silencing pot.
Fig. 2 is the side planing figure of the present invention.
Number in the figure is expressed as: 1, two-door window opening；2, the two-door window opening group of column；3, the two-door window opening group of determinant；4, wing plate A；5, wing plate B；6, sound hole is crossed；7, open and flat of silencing pot；8, the 5th mozzle；81, the first mozzle；82, the second mozzle；83, the first noise reduction chamber；84, the 3rd mozzle；85, the second noise reduction chamber；86, sound gobo；87, the 4th mozzle；88, the 3rd noise reduction chamber；89, give vent to anger termination.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is done detailed description further, but embodiments of the present invention are not limited to this.
Embodiment 1:
As Figure 1-Figure 2.
A kind of low noise automotive muffler, including first noise reduction chamber the 83, second noise reduction chamber the 85, the 3rd noise reduction chamber 88 being sequentially connected with, termination 89 of giving vent to anger, the second mozzle 82 it is provided with in first noise reduction chamber 83, introduce after noise elimination gas extends into the second mozzle 82 by the first mozzle 81, first noise reduction chamber 83 is connected with the second noise reduction chamber 85 by the 3rd mozzle 84, second noise reduction chamber 85 is connected with the 3rd noise reduction chamber 88 by the 4th mozzle 87, and the 3rd noise reduction chamber 88 connects with external environment condition after running through, by the 5th mozzle 8, termination 89 of giving vent to anger；The cylinder that second mozzle 82 is all closed for front-end and back-end, the second mozzle 82 is connected by the some air passing holes and the first noise reduction chamber 83 being arranged on self outer wall；It is Guan Bi end that 3rd mozzle 84 is positioned at one end of the first noise reduction chamber 83, and the 4th mozzle 87 and the 5th mozzle 8 are positioned at one end of the 3rd noise reduction chamber 88 and are blind end；
5th mozzle 8, 4th mozzle 87, silencing pot all rectangular after 3rd mozzle 84 flattening open and flat 7, open and flat of silencing pot is provided with several two-door window openings 1, two-door window opening includes the sound hole 6 excessively of the rectangle being arranged on silencing pot open and flat 7, cross sound hole 6 and be provided with crossbeam, the axis of crossbeam and the line coincident crossing sound hole 6 relative edge midpoint, crossbeam both sides are connected to wing plate A4 and wing plate B5, crossbeam is divided into two through holes of homalographic and symmetry by crossing sound hole 6, acute angle A is constituted between wing plate A4 and open and flat of silencing pot, acute angle B is constituted between wing plate B5 and open and flat of silencing pot, the area of wing plate A4 is equal to crossing sound hole 6 region area on the left of crossbeam, the area of wing plate B5 is equal to crossing sound hole 6 region area on the right side of crossbeam.
It is M district that 3rd mozzle 84 is provided with the region of two-door window opening 1, M district is positioned at the first noise reduction chamber 83, it is N district that 4th mozzle 87 is provided with the region of two-door window opening 1, N district is positioned at the 3rd noise reduction chamber 88, it is X district that 5th mozzle 8 is provided with the region of two-door window opening 1, X district is positioned at the 3rd noise reduction chamber 88, wherein the wing plate A4 and wing plate B5 of the 3rd mozzle 84 is positioned at inside the 3rd mozzle 84 pipe, the wing plate A4 and wing plate B5 of the 5th mozzle 8 is positioned at inside the 5th mozzle 8 pipe, the wing plate A4 and wing plate B5 of the 4th mozzle 87 are positioned at inside the 4th mozzle 87 pipe.
nullThe noise reduction flow process of this enforcement is: treat that noise elimination gas is input to the second mozzle 82 from the first mozzle 81，Due to the cylinder that the second mozzle 82 is all closed for front-end and back-end，First time noise elimination is driven to process at the second mozzle 82，Treat that noise elimination gas flows to the first noise reduction chamber 83 from some air passing holes of second self outer wall of mozzle 82，Until noise elimination gas by after air passing hole，Sound wave cancels each other and is weakened，Enter after the first noise reduction chamber 83 until noise elimination gas，By entering the 3rd mozzle 84 after the two-door window opening 1 of the 3rd mozzle 84，Dividing under effect at two-door window opening 1，Noise reduction is formed interval in 3rd mozzle 84，Treat that noise elimination gas weakens further in the 3rd mozzle 84，Treat that noise elimination gas enters the second noise reduction chamber 85 by the 3rd mozzle 84，Buffering break-in is carried out at the second noise reduction chamber 85，Carry out noise reduction process further，Finally enter the 4th mozzle 87，Treat that noise elimination gas flows to the 3rd noise reduction chamber 88 from the two-door window opening 1 of the 4th mozzle 87，In the 3rd noise reduction chamber 88, form noise elimination process，Treat that noise elimination gas flows to the 5th mozzle 8 inside finally by the 5th mozzle 8 two-door window opening 1 place and discharges，Due to the guide effect of two-door window opening 1 in the 5th mozzle 8，Treat that noise elimination gas is weakened further.
Typical round crosses the noise-cancelling theory of sound hole: the structure of micropole diffusor is the straight tube of an endcapped, and tube wall is drilled with a lot of aperture.The principle of micropole diffusor is with the frequency spectrum of jet noise for foundation, if the gross area of maintenance spout is constant and replaces with a lot of little spouts, when air-flow is through small holes, the frequency spectrum of jet noise will shift to high frequency or hyperfrequency, the audible sound composition in frequency spectrum is made substantially to reduce, thus reducing the interference to people and injury.
The design of the present invention is: change traditional circular hole into rectangular opening, crossbeam is utilized to intercept into 2 symmetrical through holes by crossing sound hole 6, and utilize wing plate A4 and wing plate B5 to form sound wave obstruct break-in, cross between sound hole 6 at adjacent two, propagate to adjacent sound hole direction of crossing under the guide effect of wing plate A4 and wing plate B5 from the sound wave crossing sound hole 6 outflow, final weakening mutually, reaches the purpose of noise reduction.Under the same conditions, being that sound hole structure is different, the present invention compares the sound hole excessively of typical round structure, and when being separately provided the 5th mozzle 8 or the 4th mozzle 87 or three mozzles 84, the noise reduction index of the present invention can control at 51.5-68.4 decibel interval.
Preferably, wing plate A4 and wing plate B5 is rectangle.
The angle of acute angle A is equal to 20 degree or 30 degree or 40 degree or 50 degree or 60 degree or 70 degree, and the angle of acute angle B is equal to 20 degree or 30 degree or 40 degree or 50 degree or 60 degree or 70 degree.
Through above-mentioned experiment, the present invention is preferred, and when the angle of acute angle A is equal to 30 degree, the angle of acute angle B is equal to 30 degree.
Preferably, the angle of acute angle A is equal to acute angle B.
Further, every three two-door window openings 1 rearrange the two-door window opening group 2 of column according to yi word pattern, every three column two-door window opening groups 2 are according to the row arrangement composition two-door window opening group 3 of determinant, the column direction of being expert at of the two-door window opening group 2 of two column separately flushes arrangement, centrally located column two-door window opening group 2 all two-door window opening group 2 dislocation arrangements with the column of both sides.
nullThrough experiment，When being separately provided the 5th mozzle 8 or the 4th mozzle 87 or three mozzles 84，And when the angle of acute angle A is equal to 20 degree、When the angle of acute angle B is equal to 20 degree，The noise reduction index of the present invention can control at 57.5 decibels，Through experiment，When the angle of acute angle A is equal to 30 degree、When the angle of acute angle B is equal to 30 degree，The noise reduction index of the present invention can control at 51.5 decibels，Through experiment，When the angle of acute angle A is equal to 20 degree、When the angle of acute angle B is equal to 20 degree，The noise reduction index of the present invention can control at 57 decibels，Through experiment，When the angle of acute angle A is equal to 40 degree、When the angle of acute angle B is equal to 40 degree，The noise reduction index of the present invention can control at 60.4 decibels，Through experiment，When the angle of acute angle A is equal to 50 degree、When the angle of acute angle B is equal to 50 degree，The noise reduction index of the present invention can control at 64 decibels，Through experiment，When the angle of acute angle A is equal to 60 degree、When the angle of acute angle B is equal to 60 degree，The noise reduction index of the present invention can control at 65.8 decibels，Through experiment，When the angle of acute angle A is equal to 70 degree、When the angle of acute angle B is equal to 70 degree，The noise reduction index of the present invention can control at 68.4 decibels.Through experiment, after 5th mozzle, the first mozzle, the second mozzle, the first noise reduction chamber, the 3rd mozzle, the second noise reduction chamber, sound gobo, the 4th mozzle, the 3rd noise reduction chamber, termination of giving vent to anger are combined according to said structure, it is possible to control noise output is interval at 41.7-52.1 decibel.
Being additionally provided with sound gobo 86 in second noise reduction chamber 85, sound gobo 86 is between the 4th mozzle 87 and the 3rd mozzle 84.Further reduce noise about 2 decibels.Sound gobo 86 is set simultaneously and can shorten the 3rd mozzle 84 and the 4th mozzle 87 length in the second noise reduction chamber 85, as be not provided with sound gobo 86 then need the 3rd longer mozzle 84 and the 4th mozzle 87 be then interspersed could form air-flow flex back to Flow Line.
It is angle P for the ease of aerofluxus, the axis of the 5th mozzle 8 and the axis angle of the 4th mozzle 87, the span of angle P 20 degree to 70 degree.
As it has been described above, the present invention can be realized preferably.
Claims (5)
1. a low noise automotive muffler, it is characterized in that, including the first noise reduction chamber (83) being sequentially connected with, second noise reduction chamber (85), 3rd noise reduction chamber (88), give vent to anger termination (89), it is provided with the second mozzle (82) in first noise reduction chamber (83), extend into the second mozzle (82) until noise elimination gas by the first mozzle (81) to introduce afterwards, first noise reduction chamber (83) is connected with the second noise reduction chamber (85) by the 3rd mozzle (84), second noise reduction chamber (85) is connected with the 3rd noise reduction chamber (88) by the 4th mozzle (87), 3rd noise reduction chamber (88) runs through termination of giving vent to anger (89) by the 5th mozzle (8) and connects with external environment condition afterwards；The cylinder that second mozzle (82) is all closed for front-end and back-end, the second mozzle (82) is by being arranged on some air passing holes and the connection of the first noise reduction chamber (83) of self outer wall；It is Guan Bi end that 3rd mozzle (84) is positioned at one end of the first noise reduction chamber (83), and the 4th mozzle (87) and the 5th mozzle (8) are positioned at one end of the 3rd noise reduction chamber (88) and are blind end；
null5th mozzle (8)、4th mozzle (87)、Open and flat of the silencing pot (7) that 3rd mozzle (84) is all rectangular after flattening，Open and flat of silencing pot is provided with several two-door window openings (1)，Two-door window opening includes the sound hole (6) excessively of the rectangle being arranged on open and flat of silencing pot (7)，Cross sound hole (6) and be provided with crossbeam，The axis of crossbeam and the line coincident crossing sound hole (6) relative edge midpoint，Crossbeam both sides are connected to wing plate A(4) and wing plate B(5)，Sound hole (6) is divided into two through holes of homalographic and symmetry by crossbeam，Wing plate A(4) and open and flat of silencing pot between constitute acute angle A，Wing plate B(5) and open and flat of silencing pot between constitute acute angle B，Wing plate A(4) area equal to crossing sound hole (6) region area on the left of crossbeam，Wing plate B(5) area equal to crossing sound hole (6) region area on the right side of crossbeam；
It is M district that 3rd mozzle (84) is provided with the region of two-door window opening (1), M district is positioned at the first noise reduction chamber (83), it is N district that 4th mozzle (87) is provided with the region of two-door window opening (1), N district is positioned at the 3rd noise reduction chamber (88), it is X district that 5th mozzle (8) is provided with the region of two-door window opening (1), X district is positioned at the 3rd noise reduction chamber (88), the wherein wing plate A(4 of the 3rd mozzle (84)) and wing plate B(5) be positioned at inside the 3rd mozzle (84) pipe, the wing plate A(4 of the 5th mozzle (8)) and wing plate B(5) be positioned at inside the 5th mozzle (8) pipe, the wing plate A(4 of the 4th mozzle (87)) and wing plate B(5) be positioned at inside the 4th mozzle (87) pipe；
Wing plate A(4) and wing plate B(5) it is rectangle；Being additionally provided with sound gobo (86) in second noise reduction chamber (85), sound gobo (86) is positioned between the 4th mozzle (87) and the 3rd mozzle (84).
2. a kind of low noise automotive muffler according to claim 1, it is characterised in that the angle of acute angle A is equal to 20 degree or 30 degree or 40 degree or 50 degree or 60 degree or 70 degree, and the angle of acute angle B is equal to 20 degree or 30 degree or 40 degree or 50 degree or 60 degree or 70 degree.
3. a kind of low noise automotive muffler according to claim 1, it is characterised in that the angle of acute angle A is equal to acute angle B.
4. a kind of low noise automotive muffler according to claim 1, it is characterized in that, every three two-door window openings (1) rearrange the two-door window opening group (2) of column according to yi word pattern, every three column two-door window opening group (2) are according to the row arrangement composition two-door window opening group (3) of determinant, the column direction of being expert at of the two-door window opening group (2) of two column separately flushes arrangement, centrally located column two-door window opening group (2) all two-door window opening group (2) dislocation arrangements with the column of both sides.
5. a kind of low noise automotive muffler according to claim 1, it is characterised in that the axis of the 5th mozzle (8) and the axis angle of the 4th mozzle (87) are angle P, the span of angle P 20 degree to 70 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410099801.8A CN104153862B (en) | 2014-03-18 | 2014-03-18 | A kind of low noise automotive muffler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410099801.8A CN104153862B (en) | 2014-03-18 | 2014-03-18 | A kind of low noise automotive muffler |
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| CN104153862A CN104153862A (en) | 2014-11-19 |
| CN104153862B true CN104153862B (en) | 2016-07-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110517658A (en) * | 2019-08-01 | 2019-11-29 | 上海汇海真空机械设备有限公司 | A kind of gas vent silencer of vacuum nitrogen Pesticidal and sterilizing sterilizing equipment decontaminating apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10148413A1 (en) * | 2001-09-29 | 2003-04-24 | Eberspaecher J Gmbh & Co | Flow-guiding pipe used in an exhaust silencer of an internal combustion engine comprises an axial section with a radial perforation, and a turbulator device provided upstream of the perforated section on an inner wall of the pipe |
| CN2833127Y (en) * | 2005-11-12 | 2006-11-01 | 杨百昌 | Energy-saving muffler for enclosed refrigerant compressor |
| GB2496368A (en) * | 2011-10-12 | 2013-05-15 | Ford Global Tech Llc | An acoustic attenuator for an air intake of an engine booster compressor turbine |
| CN203742711U (en) * | 2014-03-18 | 2014-07-30 | 成都陵川常友汽车部件制造有限公司 | Automobile silencer |
-
2014
- 2014-03-18 CN CN201410099801.8A patent/CN104153862B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10148413A1 (en) * | 2001-09-29 | 2003-04-24 | Eberspaecher J Gmbh & Co | Flow-guiding pipe used in an exhaust silencer of an internal combustion engine comprises an axial section with a radial perforation, and a turbulator device provided upstream of the perforated section on an inner wall of the pipe |
| CN2833127Y (en) * | 2005-11-12 | 2006-11-01 | 杨百昌 | Energy-saving muffler for enclosed refrigerant compressor |
| GB2496368A (en) * | 2011-10-12 | 2013-05-15 | Ford Global Tech Llc | An acoustic attenuator for an air intake of an engine booster compressor turbine |
| CN203742711U (en) * | 2014-03-18 | 2014-07-30 | 成都陵川常友汽车部件制造有限公司 | Automobile silencer |
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