CN205895380U - Exhaust sound quality adjusting device - Google Patents
Exhaust sound quality adjusting device Download PDFInfo
- Publication number
- CN205895380U CN205895380U CN201620737123.8U CN201620737123U CN205895380U CN 205895380 U CN205895380 U CN 205895380U CN 201620737123 U CN201620737123 U CN 201620737123U CN 205895380 U CN205895380 U CN 205895380U
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- Prior art keywords
- sound quality
- aerofluxuss
- resonance
- adjusting means
- quality adjusting
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- 239000003054 catalyst Substances 0.000 claims abstract description 5
- 238000000605 extraction Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 5
- 208000002925 dental caries Diseases 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000003584 silencer Effects 0.000 abstract 3
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
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- 239000004071 soot Substances 0.000 description 2
- 241000521257 Hydrops Species 0.000 description 1
- 206010030113 Oedema Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
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- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
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- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
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- 238000000746 purification Methods 0.000 description 1
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- 230000002889 sympathetic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The utility model discloses an exhaust sound quality adjusting device, the setting is in automobile engine's exhaust system, exhaust system is including the exhaust manifold of order connection in proper order, the three way catalyst converter who is connected with exhaust manifold, the silencer that is connected with three way catalyst converter, the tail pipe of connection on the silencer, exhaust manifold and automobile engine are connected, exhaust sound quality adjusting device includes to connect through the valve and is used for carrying out the exhaust sound production drum that sound quality adjusted to the exhaust noise between three way catalyst converter and silencer, the first pipe of connection on exhaust sound production drum, first pipe at least and the tail pipe be linked together. Can carry out characteristic sound quality to automobile engine's exhaust noise through this exhaust sound quality adjusting device's setting and adjust, when carrying out the regulation of characteristic sound quality moreover to the air current that exhausts carries out the sound quality regulation as power input source, direct feedback exhaust air current signal to exhaust sound quality, need not other power supply and signal feedback device, has stronger cost advantage.
Description
Technical field
This utility model is related to technical field of acoustics and in particular to a kind of aerofluxuss sound quality adjusting means.
Background technology
It is known that the main noise of automobile derives from electromotor, and the main noise of electromotor is exhaust noise, it
Often about 10-15db (a) to be exceeded than other noises of electromotor it is seen that reducing automobile noise and improving automobile sound quality
One important channel is how to control the discharge of exhaust noise.Gas extraction system is as the one of modern power car internal combustion engine simultaneously
Individual important composition, its performance not only decides the discharge capacity of pollutant and aerodynamic noise, the pressure loss of electromotor is also had non-
How often big impact, therefore effectively designed so as to carry out Proper Match with electromotor to gas extraction system, just becomes existing
One of key technology for vehicle energy saving and purification.The flow process of conventional exhaust acoustical match is shown in Fig. 1 at present.
It can be seen from figure 1 that conventional exhaust coupling exploitation is mainly according to customer requirement, to idling and accelerate overall sound pressure level noise and
Order noise carries out control it is impossible to have obvious abnormal sound and internal car noise to produce and significantly affect.Seldom consider car load and aerofluxuss sound product
Geological Problems.
The purpose of conventional exhaust coupling exploitation is that exhaust noise is more low better, and best exhaust noise must not produce shadow to in-car
Ring.And sound quality is defined as auditory events to the satisfaction degree of personal each side demand it is desirable to while sound is more melodious, go back
Power performance and the car load brand positioning of electromotor can be fed back.And actually in-car outer sound quality subjective assessment fraction and its noise
There is not obvious positive correlation in amplitude size, and closely related with mid-frequency noise composition and its proportion.
Utility model content
Technical problem to be solved in the utility model is for problem of the prior art, provides a kind of aerofluxuss sound quality to adjust
Regulating device, carries out feature sound quality regulation to the exhaust noise of automobile engine.
For reaching above-mentioned purpose, the technical solution adopted in the utility model is:
A kind of aerofluxuss sound quality adjusting means, is arranged in the gas extraction system of automobile engine, described gas extraction system includes
The exhaust manifold being linked in sequence successively, the ternary catalyzing unit being connected with described exhaust manifold, it is connected with described ternary catalyzing unit
The acoustic filter connecing, the tail pipe being connected on described acoustic filter, described exhaust manifold is connected with described automobile engine, described aerofluxuss
Sound quality adjusting means includes being connected between described ternary catalyzing unit and described acoustic filter for exhaust noise by valve
Carry out the aerofluxuss sounding drum of sound quality regulation, the first conduit being connected on described aerofluxuss sounding drum, described first conduit is at least
It is connected with described tail pipe.
Preferably, described aerofluxuss sounding drum inclusion has the housing of hollow cavity, is arranged on the dividing plate of described enclosure interior,
Described hollow cavity is separated into two independent cavitys: the first cavity and the second cavity, described aerofluxuss sounding drum by described dividing plate
Also include the first mode of resonance being arranged in described first cavity, the second mode of resonance being arranged in described second cavity, setting
In the air inlet on described first cavity, the gas outlet that is arranged on described second cavity, described valve is connected to described air inlet
At mouthful, described first conduit is connected at described gas outlet, and described first mode of resonance and described first cavity form the first resonance
Chamber, described second mode of resonance and described second cavity form the second resonant cavity, described first mode of resonance and described second mode of resonance
It is connected or is wholely set, the natural frequency of described first mode of resonance is identical with the natural frequency of described first resonant cavity, described
The natural frequency of the second mode of resonance is identical with the natural frequency of described second resonant cavity.
Further, the material behavior of described first mode of resonance and the second mode of resonance is different.
Further, described aerofluxuss sounding drum also includes sealing gasket, and described sealing gasket is arranged on described first mode of resonance, institute
State the second mode of resonance and the intersection of described dividing plate.
Preferably, described aerofluxuss sound quality adjusting means also includes the second conduit, and described second conduit is connected to described three
On pipeline between first catalyst converter and described acoustic filter, and it is connected with described valve.
Further, described aerofluxuss sound quality adjusting means is also included for entering to the air-flow entering described aerofluxuss sounding drum
The defecator that row filters, described defecator is arranged on described second conduit.
Further, described defecator adopts metal gauze, and described metal gauze is arranged on described second conduit
Upper end.
Preferably, the prime acoustic filter that described acoustic filter includes being connected with described ternary catalyzing unit is disappeared with described prime
The rear class acoustic filter that sound device is connected, described first conduit is connected on described rear class acoustic filter, and described aerofluxuss sound quality is adjusted
Device is connected between described ternary catalyzing unit and described prime acoustic filter, or described aerofluxuss sound quality adjusting means is connected to
Between described prime acoustic filter and described rear class acoustic filter.
Preferably, described first conduit leads to inside automobile bodies, or described first conduit leads to outside automobile bodies.
Due to the utilization of technique scheme, this utility model compared with prior art has the advantage that this practicality is new
The aerofluxuss sound quality adjusting means structure of type is simple, and the setting by this aerofluxuss sound quality adjusting means can be to automobile engine
Exhaust noise carries out feature sound quality regulation, and when carrying out the regulation of feature sound quality, is inputted using exhaust airstream as power
Source, direct feedback exhaust airstream signal so that sound quality regulation is carried out to aerofluxuss sound quality, need not other power sources and signal anti-
Feedback device, has stronger cost advantage.
Brief description
Accompanying drawing 1 is the flow chart of conventional exhaust acoustical match；
Accompanying drawing 2 is the structural representation of aerofluxuss sound quality adjusting means of the present utility model；
Accompanying drawing 3 is the structural representation (enlarged drawing) of aerofluxuss sounding drum of the present utility model.
Wherein: 1, the second conduit；2nd, valve；3rd, aerofluxuss sounding drum；31st, housing；32nd, dividing plate；33rd, the first resonant cavity；34、
Second resonant cavity；35th, the first mode of resonance；36th, the second mode of resonance；37th, air inlet；38th, gas outlet；39th, sealing gasket；4th, first lead
Pipe；5th, defecator；100th, exhaust manifold；200th, ternary catalyzing unit；301st, prime acoustic filter；302nd, rear class acoustic filter；400、
Tail pipe；501st, front pipe；502nd, middle pipe.
Specific embodiment
Come with specific embodiment below in conjunction with the accompanying drawings the technical solution of the utility model is further elaborated.
Aerofluxuss sound quality adjusting means shown in Figure 2, this aerofluxuss sound quality adjusting means is arranged on automobile engine
Gas extraction system in, the gas extraction system of automobile engine includes the exhaust manifold 100 being linked in sequence successively and exhaust manifold 100
Acoustic filter that the ternary catalyzing unit 200 being connected is connected with ternary catalyzing unit 200, the tail pipe 400 being connected on acoustic filter,
Exhaust manifold 100 is connected with automobile engine, this aerofluxuss sound quality adjusting means be connected to ternary catalyzing unit 200 and acoustic filter it
Between, for feature sound quality regulation is carried out to the exhaust noise of automobile engine.
A kind of specific embodiment, the gas extraction system of this automobile engine adopts two-stage noise elimination structure, i.e. acoustic filter bag
Include the prime acoustic filter 301 being connected by front pipe 501 with ternary catalyzing unit 200 and prime acoustic filter 301 passes through middle pipe 502
The rear class acoustic filter 302 being connected, tail pipe 400 is connected on rear class acoustic filter 302, and this aerofluxuss sound quality adjusting means can connect
On front pipe 501 it is also possible on pipe 502 in being connected to, or it is integrally disposed on prime acoustic filter 301.In the present embodiment, should
Aerofluxuss sound quality adjusting means is connected on front pipe 501.
The second conduit 1 that this aerofluxuss sound quality adjusting means includes being linked in sequence successively, valve 2, aerofluxuss sounding drum 3 and
One conduit 4.
Second conduit 1 adopts tee T, and two passage is connected with front pipe 501 respectively, and another one passage is with valve 2 even
Logical.
Valve 2 is used for controlling the keying of aerofluxuss sound quality adjusting means, when needing the exhaust noise of automobile engine is entered
When row feature sound quality is adjusted, turn on valve 2；Carry out feature sound quality regulation when not needing the aerofluxuss to automobile engine
When, it is shut off valve 2.Valve 2 can adopt Pneumatic vacuum valve, or hand-operated valve, or autocontrol valve, and control valve 2 is opened
The controlling switch closing action is arranged on driving interior, and driver can directly the keying to valve 2 be controlled by shift knob.
As shown in figure 3, aerofluxuss sounding drum 3 includes having the housing 31 of hollow cavity, is arranged on dividing plate within housing 31
32, hollow cavity is separated into two independent cavitys: the first cavity and the second cavity by dividing plate 32, and aerofluxuss sounding drum also includes setting
The second mode of resonance 36 of put in the first mode of resonance 35 in the first cavity, being arranged in the second cavity, it is arranged on the first cavity
Air inlet 37, the gas outlet 38 being arranged on the second cavity, valve 2 is connected at air inlet 37, and the first conduit 4 is connected to out
At QI KOU 38, between the first mode of resonance 35 and the first cavity, form the first resonant cavity 33, the second mode of resonance 36 and the second cavity it
Between form the second resonant cavity 34, the first mode of resonance 35 and the second mode of resonance 36 are wholely set, or the first mode of resonance 35 and second
Reconnect together after mode of resonance 36 split setting, the natural frequency of the natural frequency of the first mode of resonance 35 and the first resonant cavity 33
Identical, the natural frequency of the second mode of resonance 36 is identical with the natural frequency of the second resonant cavity 34.First mode of resonance 35, first resonates
Chamber 33, the second mode of resonance 36, the natural frequency of the second resonant cavity 34 all can be adjusted, thus can reach the acoustical signature of different-effect
Quality.
First mode of resonance 35 is different with the material behavior of the second mode of resonance 36, and the first mode of resonance 35 requires to have well may be used
By durability, the second mode of resonance 36 requires there is good sound amplification characteristic.
This aerofluxuss sounding drum 3 also includes sealing gasket 39, and sealing gasket 39 is arranged on the first mode of resonance 35, the second mode of resonance 36 and
The intersection of dividing plate 32, can ensure the first mode of resonance 35, the second mode of resonance 36, the first resonant cavity by the setting of sealing gasket 39
33rd, the sealing between the second resonant cavity 34, prevents gas leak phenomenon from occurring.
After air-flow enters aerofluxuss sounding drum 3, the first mode of resonance 35 produces vibration in the presence of exhaust airstream, due to the
The natural frequency of one mode of resonance 35 is identical with the natural frequency of the first resonant cavity 33, makes the first mode of resonance 35 and the first resonant cavity 33
Resonate, resonant interaction makes the oscillation intensity of the first mode of resonance 35 increase, thus driving the second mode of resonance 36 to vibrate, by
Identical with the natural frequency of the second resonant cavity 34 in the natural frequency of the second mode of resonance 36, with second during the second mode of resonance 36 vibration
Resonant cavity 34 produces resonance, is exaggerated sympathetic response sound further.
First conduit 4 at least needs to be connected with tail pipe 400, is made an uproar with aerofluxuss produced by the gas extraction system to automobile engine
Sound carries out feature sound quality regulation, and the first conduit 4 can also be communicated to the interior of automobile, the noise to interior simultaneously
Carry out feature sound quality regulation, or the first conduit 4 is communicated to the vehicle exterior of automobile, spy is carried out to the noise of vehicle exterior
Levy sound quality to adjust.
This aerofluxuss sound quality adjusting means also includes the filtration dress for being filtered to the air-flow entering aerofluxuss sounding drum 3
Put 5, defecator 5 is arranged on the second conduit 1.In the present embodiment, defecator 5 adopts metal gauze, may filter that exhaust system
Soot dust granule in system, prevents the corrosion to aerofluxuss sounding drum 3 for the objects such as soot dust granule, adjusts dress to improve this aerofluxuss sound quality
The reliable durable put.Metal gauze is arranged on the upper end of the second conduit 1, can prevent hydrops from aerofluxuss sounding drum 3 is corroded.
Because the outer sound quality subjective assessment fraction of in-car does not have obvious positive correlation with its noise amplitude size, and and intermediate frequency
Noise composition and its proportion are closely related, and accordingly, this utility model embodiment is on the basis of former aerofluxuss scheme, there is provided
Above-mentioned aerofluxuss sound quality adjusting means, coordinates sound to optimize tail mouth and internal car noise for producing a kind of extra Mid Frequency
Sound quality characteristic.The matching process being exhausted sound quality using this aerofluxuss sound quality adjusting means is as follows:
(1) main engine plants set aerofluxuss target and sound quality target according to competing product vehicle；
(2) client carries out feature analysiss according to aerofluxuss target harmony QT Quality Target, confirms that gas extraction system coordinates phonematics special
Levy；
(3) client adjusts the natural frequency of mode of resonance and the natural frequency of cavity according to coordinating phonematics characteristic；
(4) engine bench test checking and subjective assessment are carried out to aerofluxuss sound quality adjusting means, according to subjective evaluation result pair
Its resonant frequency carries out suboptimization again；
(5) on real vehicle, subjective assessment checking and optimization are carried out to aerofluxuss sound quality adjusting means.
Aerofluxuss sound quality adjusting means structure of the present utility model is simple, by the setting of this aerofluxuss sound quality adjusting means
Not only the exhaust noise of automobile engine can be carried out with feature sound quality regulation, simultaneously can also be to automobile bodies inside or outer
The noise in portion carries out feature sound quality regulation；And when carrying out the regulation of feature sound quality, inputted using exhaust airstream as power
Source, direct feedback exhaust airstream signal so that sound quality regulation is carried out to aerofluxuss sound quality, need not other power sources and signal anti-
Feedback device, has stronger cost advantage.
Above-described embodiment is only that technology design of the present utility model and feature are described, its object is to allow and is familiar with technique
Personage will appreciate that content of the present utility model and implement according to this, protection domain of the present utility model can not be limited with this.
All equivalence changes made according to this utility model spirit or modification, all should cover protection domain of the present utility model it
Interior.
Claims (9)
1. a kind of aerofluxuss sound quality adjusting means, is arranged in the gas extraction system of automobile engine, described gas extraction system include according to
The ternary catalyzing unit that the secondary exhaust manifold being linked in sequence is connected with described exhaust manifold is connected with described ternary catalyzing unit
Acoustic filter, the tail pipe being connected on described acoustic filter, described exhaust manifold is connected with described automobile engine, and its feature exists
Include being connected to by valve between described ternary catalyzing unit and described acoustic filter in: described aerofluxuss sound quality adjusting means and be used for
Exhaust noise is carried out with the aerofluxuss sounding drum of sound quality regulation, the first conduit being connected on described aerofluxuss sounding drum, described the
One conduit is at least connected with described tail pipe.
2. aerofluxuss sound quality adjusting means according to claim 1 it is characterised in that: the drum inclusion of described aerofluxuss sounding has
The housing of hollow cavity, it is arranged on the dividing plate of described enclosure interior, described hollow cavity is separated into two independences by described dividing plate
Cavity: the first cavity and the second cavity, described aerofluxuss sounding drum also includes the first resonance being arranged in described first cavity
Mould, the second mode of resonance being arranged in described second cavity, the air inlet being arranged on described first cavity, it is arranged on described
Gas outlet on two cavitys, described valve is connected at described air inlet, and described first conduit is connected at described gas outlet, institute
State the first mode of resonance and described first cavity forms the first resonant cavity, described second mode of resonance and described second cavity form second
Resonant cavity, described first mode of resonance is connected with described second mode of resonance or is wholely set, the intrinsic frequency of described first mode of resonance
Rate is identical with the natural frequency of described first resonant cavity, and the natural frequency of described second mode of resonance is consolidated with described second resonant cavity
There is frequency identical.
3. aerofluxuss sound quality adjusting means according to claim 2 it is characterised in that: described first mode of resonance and second is altogether
Shake mould material behavior different.
4. aerofluxuss sound quality adjusting means according to claim 2 it is characterised in that: described aerofluxuss sounding drum also includes close
Packing, described sealing gasket is arranged on the intersection of described first mode of resonance, described second mode of resonance and described dividing plate.
5. aerofluxuss sound quality adjusting means according to claim 1 it is characterised in that: described aerofluxuss sound quality adjusting means
Also include the second conduit, described second conduit is connected on the pipeline between described ternary catalyzing unit and described acoustic filter, and with
Described valve is connected.
6. aerofluxuss sound quality adjusting means according to claim 5 it is characterised in that: described aerofluxuss sound quality adjusting means
Also include for the defecator that the air-flow entering described aerofluxuss sounding drum is filtered, described defecator is arranged on described
On second conduit.
7. aerofluxuss sound quality adjusting means according to claim 6 it is characterised in that: described defecator adopts tinsel
Net, described metal gauze is arranged on the upper end of described second conduit.
8. aerofluxuss sound quality adjusting means according to claim 1 it is characterised in that: described acoustic filter includes and described three
The rear class acoustic filter that the prime acoustic filter that first catalyst converter is connected is connected with described prime acoustic filter, described first conduit is even
It is connected on described rear class acoustic filter, described aerofluxuss sound quality adjusting means is connected to described ternary catalyzing unit and is eliminated the noise with described prime
Between device, or described aerofluxuss sound quality adjusting means is connected between described prime acoustic filter and described rear class acoustic filter.
9. aerofluxuss sound quality adjusting means according to claim 1 it is characterised in that: described first conduit leads to Automobile
Inside railway carriage or compartment, or described first conduit leads to outside automobile bodies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620737123.8U CN205895380U (en) | 2016-07-14 | 2016-07-14 | Exhaust sound quality adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620737123.8U CN205895380U (en) | 2016-07-14 | 2016-07-14 | Exhaust sound quality adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205895380U true CN205895380U (en) | 2017-01-18 |
Family
ID=57773420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620737123.8U Withdrawn - After Issue CN205895380U (en) | 2016-07-14 | 2016-07-14 | Exhaust sound quality adjusting device |
Country Status (1)
| Country | Link |
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| CN (1) | CN205895380U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014576A (en) * | 2016-07-14 | 2016-10-12 | 清华大学苏州汽车研究院（相城） | Exhaust sound quality adjusting device and matching method |
-
2016
- 2016-07-14 CN CN201620737123.8U patent/CN205895380U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014576A (en) * | 2016-07-14 | 2016-10-12 | 清华大学苏州汽车研究院（相城） | Exhaust sound quality adjusting device and matching method |
| CN106014576B (en) * | 2016-07-14 | 2019-01-22 | 清华大学苏州汽车研究院（相城） | A kind of exhaust sound quality regulating device and matching process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170118 Effective date of abandoning: 20190122 |