CN107227991A - A kind of dual reflux opposite-flushing type back pressure automobile exhaust muffler - Google Patents
A kind of dual reflux opposite-flushing type back pressure automobile exhaust muffler Download PDFInfo
- Publication number
- CN107227991A CN107227991A CN201710653758.9A CN201710653758A CN107227991A CN 107227991 A CN107227991 A CN 107227991A CN 201710653758 A CN201710653758 A CN 201710653758A CN 107227991 A CN107227991 A CN 107227991A
- Authority
- CN
- China
- Prior art keywords
- pipe
- hole
- antipriming
- sound attenuation
- antipriming 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.)
- Pending
Links
- 230000009977 dual effect Effects 0.000 title claims abstract description 15
- 238000010992 reflux Methods 0.000 title claims abstract description 15
- 238000011010 flushing procedure Methods 0.000 title claims description 13
- 239000000463 material Substances 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 4
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/06—Silencing apparatus characterised by method of silencing by using interference effect
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/16—Selection of particular materials
Abstract
Second pipe（5）Dual reflux cavity configuration have reduction exhaust airstream speed function, sound attenuation（6）Six cavity configurations play sound wave liquidate offset noise reduction function.In the first antipriming pipe（1）With the second antipriming pipe（4）, the 3rd antipriming pipe（7）With the 4th antipriming pipe（9）Tube wall on multiple apertures for being opened up, the frequency of noise is moved into the high band that human ear can not hear.4th pipe（11）, the 5th pipe（12）, the 6th pipe（13）With the 7th pipe（14）By being mutated the section that air-flow passes through, there is hindrance function to sound wave.The first set valve（3）With the second valve（8）It is to be opened and closed when engine is in different working conditions, beneficial to the smooth of exhaust when valve opening is engine high rotating speed, valve, which is closed, keeps back pressure, holding torque when being low engine speeds.Its largest benefit is that muffler is also followed in optimal mute state when engine is in different working conditions.
Description
Technical field
The invention belongs to field of automobile, more particularly to a kind of dual reflux opposite-flushing type back pressure automobile exhaust noise reduction
Device.
Background technology
Automobile engine operationally, can produce noise during its exhaust emissions.If do not disappeared to produced noise
Sound processing, will severely impact people ground normal life around.At present used in automobile engine be equipped with muffler, its
Erasure effect can substantially meet requirement.But for corresponding ground use environment, its erasure effect is more good more welcome.
For noise reduction means, two kinds of means are mainly taken in the design of muffler：Resistive noise reduction, resistant noise-reducing and resistance
Anti- combined type noise reduction.Specific implementation substantially microperforated panel noise reduction, aperture noise reduction, active noise reduction.Above noise reduction method
Respectively there is feature, designer will take different measures to design muffler according to object to be dealt with.
The content of the invention
Means of the present invention are impedance complex formula noise reduction method.The chamber of different cross section is entered by the straight tube of gas circuit
Body changes space and produces the reflection of acoustic energy, interference, so as to reduce from the acoustic energy to external radiation, to reach the noise elimination of noise elimination purpose
Device.Many apertures are opened up on straight tube, 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 set substantially to reduce.
Used dual reflux cavity configuration, produced noise is then exhausted from by symmetrical flow division into sound attenuation, from sound wave
The function that angle will have waveform of cancelling out each other, to abate the noise.Back pressure is high, and low torque is big.
In order to improve the effect of sound wave counteracting, valve is provided with the pipeline of the both sides of sound attenuation, to adjust noise
The uniformity of circulation, so as to reach more preferable erasure effect.Valve is controllable, during valve opening, is run beneficial to high engine speeds
When smooth in exhaust.Back pressure and moment of torsion are kept when valve is closed.
The material that the manufacture of total part is used is titanium alloy material TA2, and its advantage is：Light weight, it is heat-insulated
Property it is good, antiseptic property be better than stainless steel.No high-frequency cacophony is said from acoustic angle.
The technical scheme of use
A kind of dual reflux opposite-flushing type back pressure automobile exhaust muffler, including：First antipriming pipe, the first pipe, the first valve, more than second
Kong Guan, the second pipe, sound attenuation, the 3rd antipriming pipe, the second valve, the 4th antipriming pipe, the 3rd pipe, the 4th pipe, the 5th pipe, the 6th
Pipe and the 7th pipe.Wherein, the first antipriming pipe is identical with the second antipriming pipe, the 3rd antipriming pipe and the 4th antipriming pipe.First pipe and the
Three pipes are identical.It is characterized in that：
Multiple apertures are provided with the wall in the left side in the second hole of the first antipriming pipe.
Second hole side of the first antipriming pipe sequentially passes through the 12nd hole, 11-holes and the tenth hole on sound attenuation, the
The outer wall of one antipriming pipe is tightly connected with this some holes.Second hole of the first antipriming pipe is placed in the second intracavitary of sound attenuation.First
Multiple apertures on antipriming pipe are placed in the 5th intracavitary of sound attenuation.
First hole of the first antipriming pipe is tightly connected with the hole on the first pipe outer cylinder.
Second hole side of the 4th antipriming pipe sequentially passes through seven apertures in the human head, octal and the 9th hole on sound attenuation, more than the 4th
The outer wall of hole pipe is tightly connected with this some holes.Second hole of the 4th antipriming pipe is placed in the second intracavitary of sound attenuation.4th is porous
Multiple apertures on pipe are placed in the 3rd intracavitary of sound attenuation.
First hole of the 4th antipriming pipe is tightly connected with the hole on the 3rd pipe outer cylinder.
Second hole side of the second antipriming pipe sequentially passes through the first hole, the second hole and the 3rd hole on sound attenuation, more than second
The outer wall of hole pipe is tightly connected with this some holes.Second hole of the second antipriming pipe is placed in the first intracavitary of sound attenuation.More than second
Multiple apertures on the pipe of hole are placed in the 5th intracavitary of sound attenuation.
First hole of the second antipriming pipe is tightly connected with the 4th hole on the second pipe.
Second hole side of the 3rd antipriming pipe sequentially passes through the 6th hole, the 5th hole and the 4th hole on sound attenuation, more than the 3rd
The outer wall of hole pipe is tightly connected with this some holes.Second hole of the 3rd antipriming pipe is placed in the first intracavitary of sound attenuation.3rd is porous
Multiple apertures on pipe are placed in the 3rd intracavitary of sound attenuation.
First hole of the 3rd antipriming pipe is tightly connected with the 3rd hole on the second pipe.
The upper port of first valve is sealed with the 5th hole on the second pipe
Connection, the lower port of the first valve and the upper port of the first pipe are tightly connected.
The upper port of second valve is tightly connected with the second hole on the second pipe, the lower port of the second valve and the 3rd pipe
Upper port is tightly connected.
4th pipe is sealed through the 15th hole and the 16th hole on sound attenuation, outer cylinder and the two holes of the 4th pipe
Connection.
5th pipe is sealed through the 13rd hole and the 14th hole on sound attenuation, outer cylinder and the two holes of the 5th pipe
Connection.
6th pipe is sealed through the 19th hole and the 20th hole on sound attenuation, outer cylinder and the two holes of the 6th pipe
Connection.
7th pipe is sealed through the tenth seven apertures in the human head and the tenth octal on sound attenuation, outer cylinder and the two holes of the 7th pipe
Connection.
All parts are all by titanium TA2 material system on a kind of dual reflux opposite-flushing type back pressure automobile exhaust muffler
Into.
First valve and the second valve are commercially available prod.
Advantage
Manufactured using titanium alloy, lightweight, anti-corrosion, no high-frequency cacophony, it is heat-insulated good；
Dual reflux chamber, opposite-flushing type structure reduction air velocity；
The cavity configuration of sound attenuation six, mixing noise reduction.
Brief description of the drawings
Fig. 1 is a kind of assembling schematic diagram of dual reflux opposite-flushing type back pressure automobile exhaust muffler；
Fig. 2 is Fig. 1 sectional view B-B；
Fig. 3 is Fig. 1 sectional view A-A；
Fig. 4 is Fig. 1 sectional view C-C；
Fig. 5 is Fig. 3 sound attenuation view；
Fig. 6 is Fig. 5 sectional view D-D；
Fig. 7 is Fig. 5 sectional view E-E；
Fig. 8 is the station location marker figure of the second pipe；
Fig. 9 is the station location marker figure of the first antipriming pipe.
Embodiment
Embodiment 1
A kind of dual reflux opposite-flushing type back pressure automobile exhaust muffler, including：First antipriming pipe 1, the first pipe 2, the first valve 3,
Two antipriming pipes 4, the second pipe 5, sound attenuation 6, the 3rd antipriming pipe 7, the second valve 8, the 4th antipriming pipe 9, the 3rd pipe the 10, the 4th pipe
11st, the 5th pipe 12, the 6th pipe 13 and the 7th pipe 14；Wherein, the first antipriming pipe 1 and the second antipriming pipe 4, the 3rd antipriming pipe 7 and
Four antipriming pipes 9 are identical；First pipe 2 is identical with the 3rd pipe 10；It is characterized in that：
Multiple apertures are provided with the wall in the left side in the second hole 47 of the first antipriming pipe 1；
The side of the second hole 47 of first antipriming pipe 1 sequentially passes through the 12nd hole 30, the hole of 11-holes 29 and the tenth on sound attenuation 6
28, outer wall and this some holes of the first antipriming pipe 1 are tightly connected；Second hole 47 of the first antipriming pipe 1 is placed in the second of sound attenuation 6
In chamber 22；Multiple apertures on first antipriming pipe 1 are placed in the 5th chamber 31 of sound attenuation 6；
First hole 46 of the first antipriming pipe 1 is tightly connected with the hole on the outer cylinder of the first pipe 2；
The side of the second hole 47 of 4th antipriming pipe 9 sequentially passes through seven apertures in the human head 25 on sound attenuation 6, the hole 27 of octal 26 and the 9th,
The outer wall of 4th antipriming pipe 9 is tightly connected with this some holes；Second hole 47 of the 4th antipriming pipe 9 is placed in the second chamber of sound attenuation 6
In 22；Multiple apertures on 4th antipriming pipe 9 are placed in the 3rd chamber 23 of sound attenuation 6；
The first hole 46 and the hole on the outer cylinder of the 3rd pipe 10 of 4th antipriming pipe 9 are tightly connected；
The side of the second hole 47 of second antipriming pipe 4 sequentially passes through the first hole 15, the second hole 16 and the 3rd hole 17 on sound attenuation 6,
The outer wall of second antipriming pipe 4 is tightly connected with this some holes；Second hole 47 of the second antipriming pipe 4 is placed in the first of sound attenuation 6
In chamber 21；Multiple apertures on second antipriming pipe 4 are placed in the 5th chamber 31 of sound attenuation 6；
First hole 46 of the second antipriming pipe 4 is tightly connected with the 4th hole 44 on the second pipe 5；
The side of the second hole 47 of 3rd antipriming pipe 7 sequentially passes through the 6th hole 20, the 5th hole 19 and the 4th hole 18 on sound attenuation 6,
The outer wall of 3rd antipriming pipe 7 is tightly connected with this some holes；Second hole 47 of the 3rd antipriming pipe 7 is placed in the first chamber of sound attenuation 6
In 21；Multiple apertures on 3rd antipriming pipe 7 are placed in the 3rd chamber 23 of sound attenuation 6；
First hole 46 of the 3rd antipriming pipe 7 is tightly connected with the 3rd hole 43 on the second pipe 5；
The upper port of first valve 3 is sealed with the 5th hole 45 on the second pipe 5
Connection, the lower port of the first valve 3 and the upper port of the first pipe 2 are tightly connected；
The upper port of second valve 8 is tightly connected with the second hole 42 on the second pipe 5, the lower port of the second valve 8 and the 3rd pipe
10 upper port is tightly connected；
4th pipe 11 through the 15th hole 35 and the 16th hole 36 on sound attenuation 6, the outer cylinder of the 4th pipe 11 and the two
Hole is tightly connected；
5th pipe 12 through the 13rd hole 33 and the 14th hole 34 on sound attenuation 6, the outer cylinder of the 5th pipe 12 and the two
Hole is tightly connected；
6th pipe 13 through the 19th hole 39 and the 20th hole 40 on sound attenuation 6, the outer cylinder of the 6th pipe 13 and the two
Hole is tightly connected；
7th pipe 14 through the tenth seven apertures in the human head 37 and the tenth octal 38 on sound attenuation 6, the outer cylinder of the 7th pipe 14 and the two
Hole is tightly connected.
Embodiment 2
A kind of embodiment 2 of dual reflux opposite-flushing type back pressure automobile exhaust muffler is substantially the same manner as Example 1, and its difference exists
In：
All parts are all made up of titanium TA2 material on a kind of dual reflux opposite-flushing type back pressure automobile exhaust muffler.
Operation principle
The exhaust outlet of engine is mingled with the first hole that gas and noise enter on the second pipe, and left and right shunting is porous into second
Pipe and the second antipriming pipe, gas and noise enter the first intracavitary.Many apertures wherein are provided with the tube wall of the second antipriming pipe, these
Aperture is in the 5th intracavitary.Gas and noise into the 5th intracavitary pass through the aperture and the 5th of the second pipe the on the first porous tube wall
Hole is flowed out, while part enters the second chamber.
Gas and noise part part enter the 5th intracavitary；Many apertures are provided with the tube wall of 3rd antipriming pipe, these apertures
In the 3rd intracavitary；Gas and noise part part enter the 3rd intracavitary.Gas and noise into the 3rd intracavitary is porous by the 4th
The second hole outflow of aperture and the second pipe on tube wall.Part enters the second chamber simultaneously.
4th pipe connects the first chamber and the 4th chamber by the second chamber, two holes of the 4th pipe；Into the first chamber gas and
Noise enters the 4th chamber by the 4th pipe.
5th pipe connects the first chamber and the 6th chamber by the 5th chamber, two holes of the 5th pipe；Into the first chamber gas and
Noise enters the 6th chamber by the 5th pipe.
6th pipe connects the second chamber and the 6th chamber by the second chamber, two holes of the 6th pipe；Into the second chamber gas and
Noise enters the 6th chamber by the 6th pipe.
7th pipe connects the second chamber and the 4th chamber by the 3rd chamber, two holes of the 7th pipe；Into the second chamber gas and
Noise enters the 4th chamber by the 7th pipe.
First valve is opened, and gas and noise directly discharge part from the 5th hole of the second pipe；Second valve is opened, gas
Body and noise directly discharge part from the second hole of the second pipe.
Claims (2)
1. a kind of dual reflux opposite-flushing type back pressure automobile exhaust muffler, including：First antipriming pipe（1）, first pipe（2）, the first valve
Door（3）, the second antipriming pipe（4）, second pipe（5）, sound attenuation（6）, the 3rd antipriming pipe（7）, the second valve（8）, it is the 4th porous
Pipe（9）, the 3rd pipe（10）, the 4th pipe（11）, the 5th pipe（12）, the 6th pipe（13）With the 7th pipe（14）；Wherein, the first antipriming pipe
（1）With the second antipriming pipe（4）, the 3rd antipriming pipe（7）With the 4th antipriming pipe（9）It is identical；First pipe（2）With the 3rd pipe（10）Phase
Together；It is characterized in that：
First antipriming pipe（1）The second hole（47）Left side wall on be provided with multiple apertures；
First antipriming pipe（1）The second hole（47）Side sequentially passes through sound attenuation（6）On the 12nd hole（30）, 11-holes
（29）With the tenth hole（28）, the first antipriming pipe（1）Outer wall be tightly connected with this some holes；First antipriming pipe（1）The second hole
（47）It is placed in sound attenuation（6）The second chamber（22）It is interior；First antipriming pipe（1）On multiple apertures be placed in sound attenuation（6）'s
5th chamber（31）It is interior；
First antipriming pipe（1）The first hole（46）With the first pipe（2）Hole on outer cylinder is tightly connected；
4th antipriming pipe（9）The second hole（47）Side sequentially passes through sound attenuation（6）On seven apertures in the human head（25）, octal（26）With
9th hole（27）, the 4th antipriming pipe（9）Outer wall be tightly connected with this some holes；4th antipriming pipe（9）The second hole（47）It is placed in
Sound attenuation（6）The second chamber（22）It is interior；4th antipriming pipe（9）On multiple apertures be placed in sound attenuation（6）The 3rd chamber
（23）It is interior；
4th antipriming pipe（9）The first hole（46）With the 3rd pipe（10）Hole on outer cylinder is tightly connected；
Second antipriming pipe（4）The second hole（47）Side sequentially passes through sound attenuation（6）On the first hole（15）, the second hole（16）With
3rd hole（17）, the second antipriming pipe（4）Outer wall be tightly connected with this some holes；Second antipriming pipe（4）The second hole（47）Put
In sound attenuation（6）The first chamber（21）It is interior；Second antipriming pipe（4）On multiple apertures be placed in sound attenuation（6）The 5th chamber
（31）It is interior；
Second antipriming pipe（4）The first hole（46）With the second pipe（5）On the 4th hole（44）It is tightly connected；
3rd antipriming pipe（7）The second hole（47）Side sequentially passes through sound attenuation（6）On the 6th hole（20）, the 5th hole（19）With
4th hole（18）, the 3rd antipriming pipe（7）Outer wall be tightly connected with this some holes；3rd antipriming pipe（7）The second hole（47）It is placed in
Sound attenuation（6）The first chamber（21）It is interior；3rd antipriming pipe（7）On multiple apertures be placed in sound attenuation（6）The 3rd chamber
（23）It is interior；
3rd antipriming pipe（7）The first hole（46）With the second pipe（5）On the 3rd hole（43）It is tightly connected；
First valve（3）Upper port with second pipe（5）On the 5th hole（45）Sealing
Connection, the first valve（3）Lower port with first pipe（2）Upper port be tightly connected；
Second valve（8）Upper port with second pipe（5）On the second hole（42）It is tightly connected, the second valve（8）Lower port
With the 3rd pipe（10）Upper port be tightly connected；
4th pipe（11）Through sound attenuation（6）On the 15th hole（35）With the 16th hole（36）, the 4th pipe（11）Column jacket
Face is tightly connected with the two holes；
5th pipe（12）Through sound attenuation（6）On the 13rd hole（33）With the 14th hole（34）, the 5th pipe（12）Column jacket
Face is tightly connected with the two holes；
6th pipe（13）Through sound attenuation（6）On the 19th hole（39）With the 20th hole（40）, the 6th pipe（13）Column jacket
Face is tightly connected with the two holes；
7th pipe（14）Through sound attenuation（6）On the tenth seven apertures in the human head（37）With the tenth octal（38）, the 7th pipe（14）Column jacket
Face is tightly connected with the two holes.
2. a kind of dual reflux opposite-flushing type back pressure automobile exhaust muffler according to claim 1, its difference is：
All parts are all made up of titanium TA2 material on a kind of dual reflux opposite-flushing type back pressure automobile exhaust muffler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710653758.9A CN107227991A (en) | 2017-08-03 | 2017-08-03 | A kind of dual reflux opposite-flushing type back pressure automobile exhaust muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710653758.9A CN107227991A (en) | 2017-08-03 | 2017-08-03 | A kind of dual reflux opposite-flushing type back pressure automobile exhaust muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107227991A true CN107227991A (en) | 2017-10-03 |
Family
ID=59958110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710653758.9A Pending CN107227991A (en) | 2017-08-03 | 2017-08-03 | A kind of dual reflux opposite-flushing type back pressure automobile exhaust muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107227991A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB379563A (en) * | 1931-11-16 | 1932-09-01 | Wallace Cranston Fairweather | Improvements in silencers for internal combustion engines |
| JP3011358U (en) * | 1994-10-17 | 1995-05-23 | 藤壷技研工業株式会社 | Car silencer |
| CN102777234A (en) * | 2012-07-30 | 2012-11-14 | 苏州市伦琴工业设计有限公司 | Hedging type exhaust silencer |
| CN203570403U (en) * | 2013-12-14 | 2014-04-30 | 宝鸡市鹏盛鑫有色金属有限责任公司 | Novel titanium and titanium alloy automobile muter |
| CN104047676A (en) * | 2014-06-14 | 2014-09-17 | 马根昌 | Improved opposite impact silencer |
| CN206035615U (en) * | 2016-08-12 | 2017-03-22 | 桂林电子科技大学 | Novel silencing device |
| CN207131468U (en) * | 2017-08-03 | 2018-03-23 | 沈阳诚信钛业有限公司 | A kind of dual reflux opposite-flushing type back pressure automobile exhaust muffler |
-
2017
- 2017-08-03 CN CN201710653758.9A patent/CN107227991A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB379563A (en) * | 1931-11-16 | 1932-09-01 | Wallace Cranston Fairweather | Improvements in silencers for internal combustion engines |
| JP3011358U (en) * | 1994-10-17 | 1995-05-23 | 藤壷技研工業株式会社 | Car silencer |
| CN102777234A (en) * | 2012-07-30 | 2012-11-14 | 苏州市伦琴工业设计有限公司 | Hedging type exhaust silencer |
| CN203570403U (en) * | 2013-12-14 | 2014-04-30 | 宝鸡市鹏盛鑫有色金属有限责任公司 | Novel titanium and titanium alloy automobile muter |
| CN104047676A (en) * | 2014-06-14 | 2014-09-17 | 马根昌 | Improved opposite impact silencer |
| CN206035615U (en) * | 2016-08-12 | 2017-03-22 | 桂林电子科技大学 | Novel silencing device |
| CN207131468U (en) * | 2017-08-03 | 2018-03-23 | 沈阳诚信钛业有限公司 | A kind of dual reflux opposite-flushing type back pressure automobile exhaust muffler |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171003 |