CN110397528A - Sound-attenuating system, sound reduction method and vehicle for air inlet system and exhaust system - Google Patents
Sound-attenuating system, sound reduction method and vehicle for air inlet system and exhaust system Download PDFInfo
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- CN110397528A CN110397528A CN201910690356.5A CN201910690356A CN110397528A CN 110397528 A CN110397528 A CN 110397528A CN 201910690356 A CN201910690356 A CN 201910690356A CN 110397528 A CN110397528 A CN 110397528A
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- sound
- air inlet
- silencer
- attenuating
- telescopic rod
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- 230000009467 reduction Effects 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000003584 silencer Effects 0.000 claims abstract description 71
- 238000010183 spectrum analysis Methods 0.000 claims abstract description 16
- 238000004458 analytical method Methods 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 11
- 230000008676 import Effects 0.000 claims description 3
- 230000008030 elimination Effects 0.000 abstract description 22
- 238000003379 elimination reaction Methods 0.000 abstract description 22
- 230000008859 change Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 2
- 230000009975 flexible effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
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- 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
- F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
- F01N1/161—Silencing apparatus characterised by method of silencing by using movable parts for adjusting resonance or dead chambers or passages to resonance or dead chambers
-
- 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
- F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
- F01N1/166—Silencing apparatus characterised by method of silencing by using movable parts for changing gas flow path through the silencer or for adjusting the dimensions of a chamber or a pipe
-
- 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
- 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
- F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
-
- 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
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10295—Damping means, e.g. tranquillising chamber to dampen air oscillations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10373—Sensors for intake systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1205—Flow throttling or guiding
- F02M35/1222—Flow throttling or guiding by using adjustable or movable elements, e.g. valves, membranes, bellows, expanding or shrinking elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1205—Flow throttling or guiding
- F02M35/1233—Flow throttling or guiding by using expansion chambers in the air intake flow path
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1294—Amplifying, modulating, tuning or transmitting sound, e.g. directing sound to the passenger cabin; Sound modulation
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Exhaust Silencers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The present invention provides a kind of sound-attenuating system, sound reduction method and vehicle for air inlet system and exhaust system, sound-attenuating system includes: signal acquisition unit, control unit and execution unit.Signal acquisition unit is used to acquire the sound pressure signal in the inlet chamber of air inlet pipeline.Control unit is used to carry out spectrum analysis to the sound pressure signal, to obtain the true peak frequency in inlet chamber, and the pre-set peak value frequency of true peak frequency and control unit is compared, and issues corresponding control instruction according to comparing result.Execution unit can adjust the expansion cavity size of the silencer of sound-attenuating system according to the control instruction, achieve the purpose that automatic noise elimination noise reduction.Sound-attenuating system of the invention carries signal acquisition unit, acquires the sound pressure signal in air inlet pipeline, and can automatically adjust according to practical changeable noise circumstance, achievees the purpose that carry out noise elimination noise reduction automatically.
Description
Technical field
The present invention relates to vehicle accessory manufacturing technology fields, more particularly to a kind of noise elimination system for air inlet system and exhaust system
System, sound reduction method and the vehicle with the sound-attenuating system.
Background technique
In the performance test of vehicle, there are the big problems of vibration noise for air inlet system and exhaust system.It is determined in engine completion status
Afterwards, the noises of air inlet system and exhaust system can not be reduced from the adjusting of engine end, then by the adjusting of air inlet system and exhaust system itself come
The importance of the noise of porting is reduced with regard to self-evident.
Currently, the not included acoustic sensor of existing air inlet system and exhaust system is by external after there is noise problem
Sensor vibrate to air inlet system and exhaust system/test of noise, then carried out again by frequency analysis silencer type selecting or
Structure design.Moreover, current silencer is designed only for some centre frequency, it can not accomplish that centre frequency can be according to reality
The changeable noise circumstance in border automatically adjusts.
Summary of the invention
It is an object of the present invention to solve exhaust system in the prior art to need external sensor to intake and exhaust system
System vibrate/test of noise and can not be according to practical changeable noise circumstance, the problem of automatically adjusting.
Particularly, the present invention provides a kind of sound-attenuating systems for air inlet system and exhaust system, comprising:
Signal acquisition unit, the sound pressure signal in inlet chamber for acquiring air inlet pipeline；
Control unit, for carrying out spectrum analysis to the sound pressure signal, to obtain the true peak in the inlet chamber
Frequency, and the pre-set peak value frequency of the true peak frequency and described control unit is compared, according to comparing result
Issue corresponding control instruction；
Execution unit adjusts the size of the expansion cavity of the silencer of the sound-attenuating system according to the control instruction, to subtract
The noise of few air inlet pipeline.
Further, the signal acquisition unit includes:
Acoustic sensor is located in the inlet chamber to detect the sound pressure signal；
Data acquisition and analysis system, connect with the acoustic sensor, are detected with acquisition by the acoustic sensor
The sound pressure signal.
Further, the radial dimension of described air inlet pipeline one end is greater than the radial dimension of its other end, the inlet chamber
Interior air-flow direction is flowed from the larger one end of the radial dimension of the air inlet pipeline to the lesser one end of its radial dimension, described
Acoustic sensor is located at biggish one end of radial dimension of the air inlet pipeline, and the silencer is located at the diameter of the air inlet pipeline
To the lesser one end of size.
Further, the acoustic sensor is high temperature microphone or high temperature microphone.
Further, the silencer includes:
Silencer cylinder is located in the inlet chamber, has the expansion cavity, the silencer in the silencer cylinder
Cylinder have along its axially through air inlet and air outlet；
Moving member, is located in the expansion cavity and at least part stretches out the air inlet, and the moving member is in the expansion
It is intracavitary movable, the moving member have along the silencer cylinder axially through through-hole with will be in the air inlet pipeline
Air imports the expansion cavity；
Adjust component, the adjustings component be located at that the expansion cavity is interior and both ends respectively with the silencer cylinder and described
Moving member mutually only supports, and the execution unit is connect with the adjusting component, and the execution order issued according to the execution unit
Along the axial activity of the silencer cylinder, to drive the moving member activity.
Further, the moving member is moveable division plate chock plug, and the section of the moving member is zigzag shape.
Further, the adjusting component includes:
Telescopic rod, the telescopic rod are column, and the silencer cylinder and movement are only supported in the both ends of the telescopic rod respectively
Part, the telescopic rod are electrically connected with the execution unit；
Extension spring, the extension spring are set on the telescopic rod to drive the extension spring by the telescopic rod
Stretch.
Further, the telescopic rod and the extension spring are respectively two, and two telescopic rods are arranged in
The two sides of the moving member.
Further, the telescopic rod is scalable pressure pump rod.
The noise elimination that the present invention also provides a kind of according to above-described embodiment for the sound-attenuating system of air inlet system and exhaust system
Method, comprising the following steps:
Acquire the sound pressure signal in the inlet chamber of air inlet pipeline；
Spectrum analysis is carried out to the sound pressure signal, to obtain the true peak frequency in the inlet chamber；
The true peak frequency and the pre-set peak value frequency that will acquire compare, and are issued accordingly according to comparing result
Control instruction；
The size of the expansion cavity of silencer is adjusted, according to the control instruction to reduce the noise of the air inlet pipeline.
The present invention also provides a kind of vehicles, the noise elimination system including being used for air inlet system and exhaust system according to above-described embodiment
System.
Sound-attenuating system for air inlet system and exhaust system of the invention is mainly by signal acquisition unit, control unit and execution unit
Composition.Wherein, signal acquisition unit is used to acquire the sound pressure signal in the inlet chamber of air inlet pipeline.Control unit is used for described
Sound pressure signal carries out spectrum analysis, to obtain the true peak frequency in inlet chamber, and by true peak frequency and control unit
Pre-set peak value frequency compares, and issues corresponding control instruction according to comparing result.Execution unit can refer to according to the control
The expansion cavity size for adjusting the silencer of sound-attenuating system is enabled, achievees the purpose that automatic noise elimination noise reduction.Sound-attenuating system of the invention is certainly
Band signal acquisition unit, acquires the sound pressure signal in air inlet pipeline, which can be by control unit by the sound of acquisition
It presses signal to carry out spectrum analysis, obtains the crest frequency of actual acoustic characteristic, then be directed to the crest frequency, adjusted by execution unit
The size of the expansion cavity of silencer guarantees that sound-attenuating system can automatically adjust according to practical changeable noise circumstance, reaches
The automatic purpose for carrying out noise elimination noise reduction.
Further, adjusting component of the invention is mainly made of telescopic rod and extension spring, the both ends difference of telescopic rod
Silencer cylinder and moving member are only supported, extension spring is set on telescopic rod to drive extension spring stretch by telescopic rod.
Execution unit, which will execute instruction, sends telescopic rod to, controls telescopic rod activity in the expansion cavity of silencer, passes through tune machine with this
The size of expansion cavity realizes the purpose of silencer noise elimination noise reduction.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Detailed description of the invention
Some specific embodiments of the present invention is described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter.
Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached drawing:
Fig. 1 is the diagrammatic cross-section of the sound-attenuating system according to an embodiment of the present invention for air inlet system and exhaust system；
Fig. 2 is the cross-sectional view of the silencer of the sound-attenuating system according to an embodiment of the present invention for air inlet system and exhaust system.
Appended drawing reference:
Sound-attenuating system 100；
Acoustic sensor 10；
Data acquisition and analysis system 20；
Control unit 30；
Execution unit 40；
Silencer 50；Silencer cylinder 51；Expansion cavity 511；Moving member 52；Adjust component 53；Telescopic rod 531；Stretch bullet
Spring 532；
Air inlet pipeline 60；Inlet chamber 61.
Specific embodiment
Referring to Fig. 1, in engine breathing pipeline, when the engine operates, air draught passes through air inlet pipeline 60, empty
Gas flows through route as shown in figure 1 shown in arrow direction in air inlet pipeline 60, and the tube wall of air inlet pipeline 60 is collided, change into
The Flow Field Distribution of air in the inlet chamber 61 of air pipe 60 generates vibration and noise.
Referring to Fig. 1 and Fig. 2, the sound-attenuating system 100 for air inlet system and exhaust system of the invention is mainly by signal acquisition unit, control
Unit 30 and execution unit 40 composition processed.Wherein, signal acquisition unit is used to acquire the acoustic pressure in the inlet chamber 61 of air inlet pipeline
Signal.Control unit 30 is used to carry out spectrum analysis to the sound pressure signal of acquisition, to obtain the frequency of the true peak in inlet chamber 61
Rate, and true peak frequency and pre-set peak value frequency are compared, corresponding control instruction is issued according to comparing result.Also
It is to say, after the sound pressure signal that control unit 30 acquires signal acquisition unit passes through spectrum analysis, obtains the reality in inlet chamber 61
Border crest frequency, and judgement is compared with its pre-set peak value frequency.Wherein, the judgement of crest frequency can refer to existing experience
Formula, the empirical equation that can also be summarized according to different automobile types and traveling road conditions, this is to those skilled in the art can
With what is understood and can be realized, no longer it is described in detail in this application.
Control unit 30 of the invention constantly acquired according to signal acquisition unit acquisition true peak frequency and itself
Pre-set peak value frequency is constantly compared, and issues corresponding different control instruction.Execution unit 40 can refer to according to the control
511 size of expansion cavity for adjusting the silencer 50 of sound-attenuating system 100 is enabled, to achieve the purpose that automatic noise elimination noise reduction.Of the invention
Sound-attenuating system carries signal acquisition unit, acquires the acoustic pressure spectral characteristic in air inlet pipeline, which can pass through acquisition
Sound pressure signal data carry out spectrum analysis, obtain actual acoustic characteristic crest frequency, then be directed to the crest frequency, by holding
Row unit 40 adjusts the size of the expansion cavity of silencer, guarantee sound-attenuating system 100 can according to practical changeable noise circumstance into
Row automatic adjustment, achievees the purpose that carry out noise elimination noise reduction automatically.
According to one embodiment of present invention, signal acquisition unit is mainly acquired and is analyzed by acoustic sensor 10 and data
System 20 forms.Wherein, acoustic sensor 10 may be mounted in the inlet chamber 61 of air inlet pipeline 60, and acoustic sensor 10 can be with
Detect the sound pressure signal in inlet chamber 61.Data acquisition and analysis system 20 are connect with acoustic sensor 10, and data acquire and divide
Analysis system 20 can acquire the sound pressure signal of the detection of acoustic sensor 10.Data acquisition and analysis system 20 believe the acoustic pressure of acquisition
It number is sent to control unit 30, and spectrum analysis is carried out to the sound pressure signal by control unit 30, to obtain air inlet pipeline 60
Interior true peak frequency.Control unit 30 is acquired with data and analysis system 20 is connect, and control unit 30 can adopt data
The true peak frequency and the pre-set peak value frequency of control unit 30 that collection and analysis system 20 obtain compare, and according to comparison
As a result corresponding control instruction is issued.
One end of execution unit 40 is connect with control unit 30, and control unit 30 can receive the control of the sending of control unit 30
System instruction, and executed instruction accordingly according to control instruction sending.Referring to fig. 2, silencer 50 is mounted in inlet chamber 61, is eliminated the noise
Device 50 and acoustic sensor 10 are arranged spaced apart, and silencer 50 has adjustable expansion cavity 511, in the another of execution unit 40
End is connect with silencer 50, and silencer 50 is sent to the corresponding control instruction of execution unit 40 receiving by control unit 30
Afterwards, reach sound-attenuating system 100 to reduce the noise of air inlet pipeline 60 according to the size that the control instruction adjusts expansion cavity 511 and disappear
The purpose of sound noise reduction.
Therefore, the sound-attenuating system 100 for air inlet system and exhaust system of the invention carries acoustic sensor 10, and adopts with data
To acquire the sound pressure signal in air inlet pipeline 60, which can pass through control unit for collection and the connection of analysis system 20
The sound pressure signal of 30 pairs of acquisitions carries out spectrum analysis, obtains the true peak frequency in air inlet pipeline 60, then be directed to the practical peak
It is worth frequency, corresponding control instruction is issued by control unit 30, and control execution unit 40 adjusts the expansion cavity 511 of silencer 50
Size, achieve the purpose that carry out noise elimination noise reduction automatically.
According to one embodiment of present invention, referring to Fig. 1, the radial dimension of 60 one end of air inlet pipeline is greater than its other end
Radial dimension, air-flow direction is smaller from the larger one end of the radial dimension of air inlet pipeline 60 to its radial dimension in inlet chamber 61
One end flowing, acoustic sensor 10 is mounted on biggish one end of radial dimension of air inlet pipeline 60, silencer 50 be mounted on into
The lesser one end of the radial dimension of air pipe 60.That is, the radial dimension at the both ends of the air inlet pipeline 60 of vehicle motor
It is inconsistent, so that air is formed pressure difference in inlet chamber 61, air-flow direction is by the radial dimension of air inlet pipeline 60 larger one
It holds to the lesser one end of its radial dimension and flows, collision of the air to pipeline inner wall in air inlet pipeline 60 is reduced, to reduce vibration
Dynamic and noise generation is conducive to the efficiency for improving 100 noise elimination noise reduction of sound-attenuating system.
In some currently preferred embodiments of the present invention, referring to Fig. 1, acoustic sensor 10 is high temperature microphone or high temperature Mike
Wind.That is, acoustic sensor 10 can use high temperature microphone or high temperature microphone, at work due to engine, produce
Raw high-temperature gas, by using high temperature microphone or high temperature microphone as acoustic sensor 10, not only detection accuracy is high, but also
Also there is good high temperature resistance, improve the service life of acoustic sensor 10.
According to one embodiment of present invention, as depicted in figs. 1 and 2, silencer 50 is mainly by silencer cylinder 51, movement
Part 52 and adjusting component 53 combine.Wherein, silencer cylinder 51 is mounted in inlet chamber 61, and expansion is machined in silencer cylinder 51
Chamber 511, silencer cylinder 51 have along its axially through air inlet and air outlet.The air inlet of silencer cylinder 51 and go out
Port is connected with expansion cavity 511 and inlet chamber 61 respectively.Moving member 52 is mounted in expansion cavity 511, and moving member 52 is at least
A part stretches out air inlet, and moving member 52 is movable in expansion cavity 511, is machined on moving member 52 along 51 axis of silencer cylinder
To the through-hole of perforation, the air in air inlet pipeline 60 can import expansion cavity 511 by through-hole.It adjusts component 53 and is mounted on expansion
In chamber 511, the both ends for adjusting component 53 are only supported with silencer cylinder 51 and 52 phase of moving member respectively, execution unit 40 and adjusting group
Part 53 connects, and adjusting component 53 can receive executing instruction for execution unit 40, and execute life according to what execution unit 40 issued
The axial activity along silencer cylinder 51 is enabled, axial activity of the moving member 52 along silencer cylinder 51 is driven with this.Pass through movement
Part 52 is movable in the axial direction of silencer cylinder 51, the adjusting of the size of the expansion cavity 511 of silencer cylinder 51 is realized, to reach
To the purpose of 100 noise elimination noise reduction of sound-attenuating system.
According to a preferred embodiment of the present invention, as depicted in figs. 1 and 2, moving member 52 is moveable division plate chock plug,
The section of moving member 52 is zigzag shape.That is, moving member 52 can use moveable division plate chock plug, moving member 52 is cut
Face can be generally machined to zigzag shape, and silencer cylinder 51 is stretched out in the connecting pin of the moveable division plate chock plug of zigzag shape, and
The through-hole for importing air is machined on connecting pin.Two free ends of the moveable division plate chock plug of zigzag shape respectively with disappear
The inner wall of sound device cylinder 51 mutually only supports, and two free ends can be movable in the axial direction of silencer cylinder 51.Execute list
Member 40 drives moveable division plate chock plug living in the axial direction of silencer cylinder 51 by the telescopic movable of control and regulation component 53
It is dynamic, to change two free ends of moving member 52 to the axial distance of 51 bottom of silencer cylinder, reaches sound-attenuating system 100 and disappear
The purpose of sound noise reduction.
In certain specific embodiments of the invention, referring to fig. 2, component 53 is adjusted mainly by telescopic rod 531 and stretching
Spring 532 forms.Wherein, telescopic rod 531 is generally machined to column, and silencer cylinder 51 is only supported at the both ends of telescopic rod 531 respectively
With moving member 52, telescopic rod 531 is electrically connected with execution unit 40, and execution unit 40 issues executes instruction order telescopic rod accordingly
531 in the axial direction of silencer cylinder 51 telescopic movable.Extension spring 532 is set on telescopic rod 531 to be driven by telescopic rod 531
Dynamic 532 stretch of extension spring.By be arranged on telescopic rod 531 extension spring 532 effectively increase adjust component 53 exist
The stability stretched in 51 axial direction of silencer cylinder.For execution unit 40 by the telescopic movable of control and regulation component 53, driving can
Moving partition chock plug is movable in the axial direction of silencer cylinder 51, to change two free ends of moving member 52 to silencer
The axial distance of 51 bottom of cylinder achievees the purpose that 100 noise elimination noise reduction of sound-attenuating system.Preferably, telescopic rod 531 and extension spring
532 be respectively two, and two telescopic rods 531 are arranged in the two sides of moving member 52.That is, adjusting component 53 is two
Group, every group of adjusting component 53 respectively include telescopic rod 531 and extension spring 532.Telescopic rod 531 can be in the two sides of moving member 52
It is symmetrical arranged, when guaranteeing 531 activity of telescopic rod, moving member 52 is more uniformly stressed, and makes moving member 52 in silencer cylinder 51
Movement in axial direction is more stable, improves the efficiency of 100 noise elimination noise reduction of sound-attenuating system.
According to a preferred embodiment of the present invention, referring to fig. 2, telescopic rod 531 is scalable pressure pump rod.Namely
It says, telescopic rod 531 can use scalable pressure pump rod, and execution unit 40 is connect with scalable pressure pump rod, control scalable
Pressure pump rod gives liquid/gas amount, and the flexible activity of scalable pressure pump rod is controlled with this, and execution unit 40 is adjusted by control
The telescopic movable of component 53 is saved, to drive moveable division plate chock plug movable in the axial direction of silencer cylinder 51, changes and moves
Two free ends of moving part 52 achieve the purpose that 100 noise elimination noise reduction of sound-attenuating system to the axial distance of 51 bottom of silencer cylinder.
To sum up, sound-attenuating system 100 of the invention carries acoustic sensor 10, the acoustic pressure frequency spectrum acquired in pipeline is special
Property, which can carry out spectrum analysis by the data of the sound pressure signal of acquisition, obtain the peak of actual acoustic characteristic
Be worth frequency, then be directed to the crest frequency, by execution unit 40 control silencer 50 expansion cavity 511 size, reach automatically into
The purpose of row noise elimination noise reduction.The sound-attenuating system 100 can be according to the acoustic characteristic of actual change, by adjusting 53 pairs of component noise eliminations
The axial distance of expansion cavity 511 in device cylinder 51 is accordingly adjusted, to achieve the purpose that noise elimination noise reduction.
The present invention also provides a kind of sound reduction methods of sound-attenuating system 100 for air inlet system and exhaust system, comprising the following steps:
Acquire the sound pressure signal in the inlet chamber 61 of air inlet pipeline 60；
Spectrum analysis is carried out to sound pressure signal, to obtain the true peak frequency in inlet chamber 61；
The true peak frequency that will acquire is compared with pre-set peak value frequency, and issues corresponding control according to comparing result
System instruction；
The size of the expansion cavity 511 of silencer 50 is adjusted, according to control instruction to reduce the noise of the air inlet pipeline.
That is, referring to Fig. 1 and Fig. 2, sound reduction method of the invention, it is possible, firstly, to be acquired by signal acquisition unit
Sound pressure signal in the inlet chamber 61 of air inlet pipeline 60, specifically, the acoustic sensor 10 in signal acquisition unit detect air inlet
Sound pressure signal in the inlet chamber 61 of pipeline 60, data acquisition and the sound that acquisition acoustic sensor 10 detects in real time of analysis system 20
Press signal.Then, the sound pressure signal that control unit 30 acquires data and analysis system 20 acquires carries out spectrum analysis, to obtain
True peak frequency in inlet chamber 61, while the true peak frequency that will acquire is compared with its pre-set peak value frequency, and
Corresponding control instruction is issued according to comparing result.Wherein, the judgement of crest frequency can refer to existing experience formula, can also be with
According to the empirical equation that different automobile types and traveling road conditions are summarized, this is it is understood that and energy to those skilled in the art
It enough realizes, is no longer described in detail in this application.
Then, the control instruction that 40 reception control unit 30 of execution unit issues, execution unit 40 is according to the control instruction
The adjusting component 53 for adjusting silencer 50 is flexible, and drives moving member 52 movable in the axial direction of expansion cavity 511, changes expansion with this
The distance in the axial direction of chamber 511 is opened, achievees the purpose that 100 noise elimination noise reduction of sound-attenuating system.Sound reduction method of the invention, passes through acoustics
Sensor 10, data acquisition and the cooperation between analysis system 20, control unit 30, execution unit 40 and silencer 50, can
According to the acoustic characteristic of actual change, realizes to the automatic adjustment of the expansion cavity 511 of silencer 50, reach automatic noise elimination noise reduction
Purpose.
The present invention also provides a kind of vehicles, including the sound-attenuating system 100 for air inlet system and exhaust system in above-described embodiment.By
It is had above-mentioned technique effect in the sound-attenuating system 100 according to an embodiment of the present invention for air inlet system and exhaust system, therefore, according to this hair
The vehicle of bright embodiment also has corresponding technical effect, i.e., vehicle of the invention can by the way that the sound-attenuating system 100 is arranged
Sound pressure signal in automatic collection pipeline.That is, vehicle of the invention can will be acquired by installing the sound-attenuating system 100
Sound pressure signal carry out spectrum analysis, obtain true peak frequency, then be directed to the true peak frequency, controlled by execution unit 40
The size of the expansion cavity 511 of silencer 50 achievees the purpose that carry out noise elimination noise reduction automatically, and the noise for reducing vehicle motor is dirty
Dye.
The other structures of vehicle according to an embodiment of the present invention and operation are all to those skilled in the art can be with
Understand and easy to accomplish, therefore is not described in detail.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all such other variations or modifications.
Claims (10)
1. a kind of sound-attenuating system for air inlet system and exhaust system characterized by comprising
Signal acquisition unit, the sound pressure signal in inlet chamber for acquiring air inlet pipeline；
Control unit, for carrying out spectrum analysis to the sound pressure signal, to obtain the true peak frequency in the inlet chamber,
And compare the pre-set peak value frequency of the true peak frequency and described control unit, to issue phase according to comparing result
The control instruction answered；
Execution unit adjusts the size of the expansion cavity of the silencer of the sound-attenuating system, according to the control instruction to reduce
State the noise of air inlet pipeline.
2. the sound-attenuating system according to claim 1 for air inlet system and exhaust system, which is characterized in that the signal acquisition unit
Include:
Acoustic sensor is located in the inlet chamber to detect the sound pressure signal；
Data acquisition and analysis system, connects with the acoustic sensor, described in acquiring and detected as the acoustic sensor
Sound pressure signal.
3. the sound-attenuating system according to claim 2 for air inlet system and exhaust system, which is characterized in that
The radial dimension of described air inlet pipeline one end is greater than the radial dimension of its other end, air-flow direction in the inlet chamber
It is flowed from the larger one end of the radial dimension of the air inlet pipeline to the lesser one end of its radial dimension, the acoustic sensor is located at
The biggish one end of the radial dimension of the air inlet pipeline, the silencer are located at the radial dimension lesser one of the air inlet pipeline
End.
4. the sound-attenuating system according to claim 3 for air inlet system and exhaust system, which is characterized in that the silencer includes:
Silencer cylinder is located in the inlet chamber, has the expansion cavity, the silencer cylinder in the silencer cylinder
With along its axially through air inlet and air outlet；
Moving member, is located in the expansion cavity and at least part stretches out the air inlet, and the moving member is in the expansion cavity
It is interior movable, the moving member have along the silencer cylinder axially through through-hole with by the air in the air inlet pipeline
Import the expansion cavity；
Adjust component, the adjustings component be located at that the expansion cavity is interior and both ends respectively with the silencer cylinder and the movement
Part mutually only supports, and the execution unit is connect with the adjusting component, and the execution order issued according to the execution unit is along institute
The axial activity of silencer cylinder is stated, to drive the moving member activity.
5. the sound-attenuating system according to claim 4 for air inlet system and exhaust system, which is characterized in that
The moving member is moveable division plate chock plug, and the section of the moving member is zigzag shape.
6. the sound-attenuating system according to claim 4 for air inlet system and exhaust system, which is characterized in that the adjusting component packet
It includes:
Telescopic rod, the telescopic rod are column, and the silencer cylinder and moving member, institute are only supported in the both ends of the telescopic rod respectively
Telescopic rod is stated to be electrically connected with the execution unit；
Extension spring, the extension spring are set on the telescopic rod to drive the extension spring to stretch by the telescopic rod
Activity.
7. the sound-attenuating system according to claim 6 for air inlet system and exhaust system, which is characterized in that
The telescopic rod and the extension spring are respectively two, and two telescopic rods are arranged in the two of the moving member
Side.
8. the sound-attenuating system according to claim 6 for air inlet system and exhaust system, which is characterized in that
The telescopic rod is scalable pressure pump rod.
9. a kind of sound reduction method of such as sound-attenuating system of any of claims 1-8 for air inlet system and exhaust system, special
Sign is, comprising the following steps:
Acquire the sound pressure signal in the inlet chamber of air inlet pipeline；
Spectrum analysis is carried out to the sound pressure signal, to obtain the true peak frequency in the inlet chamber；
The true peak frequency that will acquire is compared with control unit pre-set peak value frequency, and is issued according to comparing result
Corresponding control instruction；
Control unit adjusts the size of the expansion cavity of silencer according to the control instruction, to reduce making an uproar for the air inlet pipeline
Sound.
10. a kind of vehicle, including the sound-attenuating system of any of claims 1-8 for air inlet system and exhaust system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910690356.5A CN110397528A (en) | 2019-07-29 | 2019-07-29 | Sound-attenuating system, sound reduction method and vehicle for air inlet system and exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910690356.5A CN110397528A (en) | 2019-07-29 | 2019-07-29 | Sound-attenuating system, sound reduction method and vehicle for air inlet system and exhaust system |
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| Publication Number | Publication Date |
|---|---|
| CN110397528A true CN110397528A (en) | 2019-11-01 |
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| CN201910690356.5A Pending CN110397528A (en) | 2019-07-29 | 2019-07-29 | Sound-attenuating system, sound reduction method and vehicle for air inlet system and exhaust system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002242651A (en) * | 2001-02-19 | 2002-08-28 | Hitachi Ltd | Variable reactance type noise eliminator |
| CN201202513Y (en) * | 2008-06-05 | 2009-03-04 | 重庆大学 | Exhausting silencer with variable volume |
| CN102477883A (en) * | 2010-11-25 | 2012-05-30 | 中原工学院 | Driving silencer |
| CN207647651U (en) * | 2017-11-21 | 2018-07-24 | 吉利汽车研究院（宁波）有限公司 | A kind of muffler and engine air inlet tube |
-
2019
- 2019-07-29 CN CN201910690356.5A patent/CN110397528A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002242651A (en) * | 2001-02-19 | 2002-08-28 | Hitachi Ltd | Variable reactance type noise eliminator |
| CN201202513Y (en) * | 2008-06-05 | 2009-03-04 | 重庆大学 | Exhausting silencer with variable volume |
| CN102477883A (en) * | 2010-11-25 | 2012-05-30 | 中原工学院 | Driving silencer |
| CN207647651U (en) * | 2017-11-21 | 2018-07-24 | 吉利汽车研究院（宁波）有限公司 | A kind of muffler and engine air inlet tube |
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Application publication date: 20191101 |