CN108518259A - Car rear muffler - Google Patents
Car rear muffler Download PDFInfo
- Publication number
- CN108518259A CN108518259A CN201810165635.5A CN201810165635A CN108518259A CN 108518259 A CN108518259 A CN 108518259A CN 201810165635 A CN201810165635 A CN 201810165635A CN 108518259 A CN108518259 A CN 108518259A
- Authority
- CN
- China
- Prior art keywords
- chamber
- siphunculus
- extend
- air inlet
- exhaust 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
- 238000013016 damping Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 4
- 238000005192 partition Methods 0.000 claims description 5
- 230000003584 silencer Effects 0.000 abstract description 17
- 230000008030 elimination Effects 0.000 abstract description 8
- 238000003379 elimination reaction Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- F01N1/06—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
- 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
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
-
- 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
- F01N13/007—Apparatus used as intake or exhaust silencer
-
- 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
- F01N2210/00—Combination of methods of silencing
- F01N2210/06—Throttling-expansion and interference
-
- 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
-
- 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
- F01N2470/20—Dimensional characteristics of tubes, e.g. length, diameter
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses a kind of car rear muffler, the inside of cylinder is separated into three chambers by front baffle and rear bulkhead, is followed successively by first chamber, second chamber and third chamber from front to back, and a coil damping material is provided on the internal ring wall of first chamber；The rear end of air inlet pipe passes through protecgulum and front baffle from front to back, and extend into second chamber, which, which is located on the pipe shaft of first chamber and second chamber, is provided with circulation mesh；The front end of exhaust pipe passes through rear cover and rear bulkhead back to front, and extend into second chamber, and exhaust pipe, which is located on the pipe shaft of second chamber, is provided with circulation mesh；It is equipped with siphunculus on the top of rear bulkhead.The present invention eliminates sound wave by wearing siphunculus on rear bulkhead, using the frictional interference cancellation principle of same frequency sound wave, while using flat protecgulum and rear cover, increases the volume of silencer, substantially increases the noise elimination effect of silencer.
Description
Technical field
The present invention relates to a kind of silencers, the more particularly to rear muffler on car.
Background technology
Automotive muffler is the common building block of automobile, advantageously reduces the noise pollution in vehicle traveling process.Sedan-chair
Rear muffler on vehicle has air inlet pipe, cylinder and an exhaust pipe set gradually from front to back, the cylinder of rear muffler generally by
Former and later two chambers form, and the front end face of cylinder is gradually smaller taper surface from back to front, and the rear end face of cylinder is from going to
The rear and front end of gradually smaller taper surface afterwards, such cylinder is compressed, and reduces the volume of two chambers, and then can influence
The noise reduction of silencer.Meanwhile existing silencer does not carry out the structure of noise elimination processing directed entirely to 80HZ wave frequencies section, and
The noise major focus of wave frequency section near 80HZ exactly entire car, thus car still have after silencer noise reduction it is larger
Noise.
Invention content
In view of the drawbacks described above of the prior art, technical problem to be solved by the invention is to provide eliminate the noise after a kind of car
Device.
Technical solution of the present invention is as follows：A kind of car rear muffler, including set gradually from front to back air inlet pipe, cylinder
And exhaust pipe, the front end of the cylinder are sealed by protecgulum, rear end is sealed by rear cover, it is characterized in that：The inside of the cylinder is by preceding
Partition board and rear bulkhead are separated into three chambers, are followed successively by first chamber, second chamber and third chamber, first chamber from front to back
Volume be substantially equal to the volume of second chamber, the volume of third chamber is 3-4 times of first chamber volume, in first chamber
A coil damping material is provided on internal ring wall；The rear end of the air inlet pipe passes through protecgulum and front baffle from front to back, and extend into
In second chamber, close to rear bulkhead, which is located on the pipe shaft of first chamber and second chamber for the rear end of air inlet pipe
It is provided with circulation mesh；The front end of the exhaust pipe passes through rear cover and rear bulkhead back to front, and extend into second chamber, is vented
Close to front baffle, which, which is located on the pipe shaft of second chamber, is provided with circulation mesh for the front end of pipe；Partition board in the rear
Top is equipped with siphunculus, and the front port of the siphunculus is extend into second chamber, and the front port of siphunculus is located at the rear end of air inlet pipe
Between the front end of exhaust pipe, the rear port of the siphunculus is extend into third chamber.
The cylinder of silencer is separated into three chambers by the present invention by front and back two pieces of partition boards, and makes the volume of third chamber
It is more much bigger than the first, second chamber, and the rear portion of air inlet pipe is located in first chamber and second chamber, the front of exhaust pipe
It is located in second chamber and third chamber.Meanwhile it being provided with mesh on the pipe shaft that is located in first chamber of air inlet pipe, then,
Acoustic wave segment in air inlet pipe can enter in first chamber, once be eliminated the noise by the deadener on inner wall.
Since air inlet pipe and an air outlet pipe is provided with mesh on the pipe shaft of second chamber, gas and sound wave can be by air inlets
Pipe is discharged into second chamber, escape pipe discharge is entered back into after second chamber circulation, so mobility of the gas in second chamber
Larger, noise is also larger.After the top of rear bulkhead wears siphunculus connection second chamber and third chamber, produced in third chamber
Raw sound wave can be passed to from siphunculus in second chamber, since the vibrations frequency of sound wave and the car that are generated in third chamber shake
Frequency it is identical, then, which forms frictional interference cancellation at the preceding nozzle of siphunculus with the sound wave in second chamber,
It converts the kinetic energy for shaking sound wave to thermal energy, thus greatly reduces the noise in second chamber, substantially increase silencer
Noise elimination effect.
In order to increase the volume of third chamber as far as possible, so that third chamber is generated stronger same frequency noise elimination wave, improve
Noise elimination effect, and ensure that the length of respective function and the silencer entirety of first chamber and second chamber is constant, described
The length of one chamber and second chamber is 88mm, and the length of third chamber is 300mm.
Since the vibration frequency section of car entirety is concentrated mainly near 80HZ, in order to make the 80HZ formed in third chamber
The sound wave of frequency band shakes condition of the acoustic wave form at cancellation by siphunculus in the front port and second chamber of siphunculus,
The length that the siphunculus is extend into second chamber and third chamber is 40-50mm, and the caliber of siphunculus is 25-30mm.
Preferably, the length that the siphunculus is extend into second chamber and third chamber is 45mm, the caliber of siphunculus
For 28mm.
In the case where keeping silencer length constant, make traditional taper type protecgulum and rear cover into circular plate
Protecgulum and rear cover make the volume of entire silencer increase 20-30%, that is, substantially increase the noise elimination effect of silencer.
Beneficial effects of the present invention are as follows：
1) by the way that the cylinder of silencer is divided into three chambers, and siphunculus is worn on rear bulkhead, produced in chamber rearward
Raw vibrations sound wave forms frictional interference with the sound wave in intermediate cavity at the preceding nozzle of siphunculus and offsets, to substantially reduce
Noise in silencer, substantially increases the noise elimination effect of silencer.
2) in the case where keeping silencer length constant, by the way that the front console of taper type and rear end panel are justified instead
The flat protecgulum of shape and rear cover, make the volume of entire silencer increase 25% or so, that is, substantially increase silencer
Noise elimination effect.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the internal structure schematic diagram of Fig. 1.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and examples：
As depicted in figs. 1 and 2, the present invention is by air inlet pipe 1, cylinder 2, exhaust pipe 3, first chamber 4, second chamber 5, third
The compositions such as chamber 6, siphunculus 7, protecgulum 8, rear cover 9, front baffle 10 and rear bulkhead 11.Wherein, cylinder 2 is round straight tube structure, should
The front end of cylinder 2 is sealed by protecgulum 8, and rear end is sealed by rear cover 9, and protecgulum 8 and rear cover 9 are both preferably round tablet, and using weldering
It connects and is fixed with cylinder 2.The inside of cylinder 2 is separated into three chambers by front baffle 10 and rear bulkhead 11, is followed successively by from front to back
One chamber 4, second chamber 5 and third chamber 6, the volume of first chamber 4 are substantially equal to the volume of second chamber 5, third chamber 6
Volume be 3-4 times of 4 volume of first chamber, a coil damping material 12 is provided on the internal ring wall of first chamber 4.This implementation
In example, the length of first chamber 4 and second chamber 5 is 88mm, and the length of third chamber 6 is 300mm.
As depicted in figs. 1 and 2, it is equipped with air inlet pipe 1 in the front end of cylinder 2, the back segment of air inlet pipe 1 is straight tube, air inlet pipe 1
Rear end from front to back horizontal through protecgulum 8 and front baffle 10, extend into second chamber 5, the sealing of the rear port of air inlet pipe 1,
The rear end of air inlet pipe 1 is close to rear bulkhead 11, and the axis parallel of 1 back segment of air inlet pipe is simultaneously close to the axial line of cylinder 2.Into
Tracheae 1, which is located on the pipe shaft of first chamber 4 and second chamber 5, is provided with circulation mesh, the circulation mesh circular tube status cloth, stream
The size of logical mesh determines according to actual needs.It is equipped with exhaust pipe 3 in simplified 2 rear end, the leading portion of exhaust pipe 3 is straight tube,
The front end of exhaust pipe 3 horizontal through rear cover 9 and rear bulkhead 11, is extend into second chamber 5 back to front, the front end of exhaust pipe 3
Mouth sealing, the front end of exhaust pipe 3 is close to front baffle 10, and the leading portion of exhaust pipe 3 is located at the lower section of 1 back segment of air inlet pipe.
Exhaust pipe 3, which is located on the pipe shaft of second chamber 5, is provided with circulation mesh, the circulation mesh circular tube status cloth.
As depicted in figs. 1 and 2, it is equipped with siphunculus 7 on the top of rear bulkhead 11, which is circular straighttube, siphunculus 7
Axial line is parallel with the axial line of cylinder 2.The caliber of siphunculus 7 is 25-30mm, preferably, the caliber of siphunculus 7 is 28mm.
The front port of siphunculus 7 is extend into second chamber 5, and the front port of the siphunculus 7 is located at rear end and the exhaust pipe 3 of air inlet pipe 1
Between front end, the rear port of siphunculus 7 is extend into third chamber 6.The siphunculus 7 extend into second chamber 5 and third chamber 6
In length be 40-50mm, preferably, the length that siphunculus 7 is extend into second chamber 5 and third chamber 6 is 45mm.
Working principle of the present invention is as follows：
As depicted in figs. 1 and 2, vibrations sound wave is flowed with gas in air inlet pipe 1 backward, when gas flow to first chamber
At 4, which part vibrations sound wave enters first chamber 4 and is eliminated the noise by the deadener of 4 inner wall of first chamber, remaining vibrations
Sound wave and gas continuation are flowed and are entered in second chamber 5 backward, wherein vibrations sound wave is before siphunculus 7 at nozzle and third
Be transmitted through the same frequency sound wave come in chamber 6 and form frictional interference cancellation, the vibrations sound wave of gas and last sub-fraction then by
Escape pipe 3 is discharged.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be in the protection domain being defined in the patent claims.
Claims (4)
1. a kind of car rear muffler, including the air inlet pipe (1), cylinder (2) and the exhaust pipe (3) that set gradually from front to back, institute
The front end for stating cylinder (2) is sealed by protecgulum (8), and rear end is sealed by rear cover (9), it is characterized in that：The inside of the cylinder (2) is by preceding
Partition board (10) and rear bulkhead (11) are separated into three chambers, are followed successively by first chamber (4), second chamber (5) and from front to back
The volume of three chambers (6), first chamber (4) is substantially equal to the volume of second chamber (5), and the volume of third chamber (6) is first
3-4 times of chamber (4) volume is provided with a coil damping material (12) on the internal ring wall of first chamber (4)；The air inlet pipe
(1) rear end passes through protecgulum (8) and front baffle (10) from front to back, and extend into second chamber (5), after air inlet pipe (1)
Close to rear bulkhead (11), which, which is located on the pipe shaft of first chamber (4) and second chamber (5), is provided with circulation for end
Mesh；The front end of the exhaust pipe (3) passes through rear cover (9) and rear bulkhead (11) back to front, and extend into second chamber (5)
In, close to front baffle (10), which, which is located on the pipe shaft of second chamber (5), is provided with circulation for the front end of exhaust pipe (3)
Mesh；The top of partition board (11) is equipped with siphunculus (7) in the rear, and the front port of the siphunculus (7) extend into second chamber (5)
In, the front port of siphunculus (7) is located between the rear end of air inlet pipe (1) and the front end of exhaust pipe (3), after the siphunculus (7)
Port is extend into third chamber (6).
2. car rear muffler as described in claim 1, it is characterized in that：The length of the first chamber (4) and second chamber (5)
Degree is 88mm, and the length of third chamber (6) is 300mm.
3. car rear muffler as claimed in claim 1 or 2, it is characterized in that：The siphunculus (7) extend into second chamber (5)
And the length in third chamber (6) is 40-50mm, the caliber of siphunculus (7) is 25-30mm.
4. car rear muffler as claimed in claim 3, it is characterized in that：The siphunculus (7) extend into second chamber (5) and
Length in three chambers (6) is 45mm, and the caliber of siphunculus (7) is 28mm.
Car rear muffler as described in claim 1, it is characterized in that：The protecgulum (8) and rear cover (9) are that circular flat is hardened
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810165635.5A CN108518259A (en) | 2018-02-28 | 2018-02-28 | Car rear muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810165635.5A CN108518259A (en) | 2018-02-28 | 2018-02-28 | Car rear muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108518259A true CN108518259A (en) | 2018-09-11 |
Family
ID=63433337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810165635.5A Pending CN108518259A (en) | 2018-02-28 | 2018-02-28 | Car rear muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108518259A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209566A (en) * | 2018-09-12 | 2019-01-15 | 重庆隆鑫机车有限公司 | A kind of silencer and motorcycle |
| CN110657000A (en) * | 2019-10-17 | 2020-01-07 | 徐州瑞田工程机械有限公司 | Exhaust pipe silencer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532411A (en) * | 2009-04-14 | 2009-09-16 | 力帆实业(集团)股份有限公司 | Rear silencer device of car |
| CN202417651U (en) * | 2012-01-17 | 2012-09-05 | 山东五征集团有限公司 | Exhaust silencer of automobile |
| CN104141522A (en) * | 2014-07-25 | 2014-11-12 | 重庆长安汽车股份有限公司 | Rear-arranged main silencer |
| CN204877604U (en) * | 2015-07-23 | 2015-12-16 | 邓厚才 | Two backward flows out single tail flat amortization drum while advancing |
-
2018
- 2018-02-28 CN CN201810165635.5A patent/CN108518259A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532411A (en) * | 2009-04-14 | 2009-09-16 | 力帆实业(集团)股份有限公司 | Rear silencer device of car |
| CN202417651U (en) * | 2012-01-17 | 2012-09-05 | 山东五征集团有限公司 | Exhaust silencer of automobile |
| CN104141522A (en) * | 2014-07-25 | 2014-11-12 | 重庆长安汽车股份有限公司 | Rear-arranged main silencer |
| CN204877604U (en) * | 2015-07-23 | 2015-12-16 | 邓厚才 | Two backward flows out single tail flat amortization drum while advancing |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209566A (en) * | 2018-09-12 | 2019-01-15 | 重庆隆鑫机车有限公司 | A kind of silencer and motorcycle |
| CN109209566B (en) * | 2018-09-12 | 2024-04-30 | 重庆隆鑫机车有限公司 | Muffler and motorcycle |
| CN110657000A (en) * | 2019-10-17 | 2020-01-07 | 徐州瑞田工程机械有限公司 | Exhaust pipe silencer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180911 |