CN201021648Y - A novel impedance compound muffling system for car engine air supply system - Google Patents

A novel impedance compound muffling system for car engine air supply system Download PDF

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Publication number
CN201021648Y
CN201021648Y CNU2006200165467U CN200620016546U CN201021648Y CN 201021648 Y CN201021648 Y CN 201021648Y CN U2006200165467 U CNU2006200165467 U CN U2006200165467U CN 200620016546 U CN200620016546 U CN 200620016546U CN 201021648 Y CN201021648 Y CN 201021648Y
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China
Prior art keywords
muffler
silencing apparatus
noise
air
strainer
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Expired - Lifetime
Application number
CNU2006200165467U
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Chinese (zh)
Inventor
陈雪峰
高木林
陈德欢
赵群坡
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BYD Co Ltd
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BYD Co Ltd
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Priority to CNU2006200165467U priority Critical patent/CN201021648Y/en
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Abstract

The utility model relates to the automobile noise reduction field, in particular to an impedance composite type noise control system. The noise control system comprises an air cleaner, a resonant cavity, a resonance-type muffler and a canvas-made resistance-type muffler, which are orderly distributed at an intake duct; the air cleaner is regarded as an expansion type muffler and a resistive muffler; the resonant cavity contains two resonance-type mufflers and one expansion type muffler; each muffler has better noise reduction effect for the noise of a certain wave band; the noise elimination frequency distribution of the seven mufflers is similar to that of an engine, thereby the better engine noise reduction effect can be obtained.

Description

A kind of impedance complex formula sound-attenuating system of new automobile engine aspirating system
[technical field]
The utility model relates to automobile noise reduction field, particularly a kind of impedance complex formula sound-attenuating system of new automobile engine aspirating system.
[background technique]
Along with the raising that people require vehicle ride comfort, reduce noise and become one of important topic of Automobile Design.Car noise is mainly from motor, because the achievement of exhausting and denoising aspect is comparatively outstanding, inflow noise has become one of main noise source of motor in recent years.Inflow noise increases with the rising of engine speed, mainly is made up of mechanicalness noise (mainly being the noise that distribution device periodically opens and closes), aerodynamic noise (mainly being the noise of flow air and filter core friction) and combustion noise.Modern Car is generally all used reactive muffler, and reactive muffler can be divided into interfere type silencing apparatus, porous decentralized silencing apparatus, expansion silencing apparatus and resonator muffler four classes.Another kind is exactly a dissipative muffler, and the sound-absorbing material that the dissipative muffler utilization is laid in the silencing apparatus pipeline absorbs acoustic energy, and the high-frequency sound wave of its centering has the effect of eliminating the noise preferably, and the filter core of air-strainer just can be regarded a dissipative muffler as at this.What existing dissipative muffler had reactive muffler again in a sound-attenuating system just is being impedance complex formula silencing apparatus.The gas handling system of car all has air-strainer now, and air-strainer can be regarded an expansion silencing apparatus as, and filter core can be regarded a dissipative muffler as, thereby car intake noise reduction system can regard impedance complex formula silencing apparatus as now.Some present cars reduce inflow noise and mainly adopt a resonant cavity and a dissipative muffler noise reduction (not comprising the air-strainer part); Part car has adopted two resonator mufflers (not comprising the air-strainer part), for example, and Chinese patent CN1208120A.But because motor can produce the noise waves of different frequency when different rotating speeds, adopt the less resonator muffler of number can only eliminate the noise ripple of certain several frequency range, not ideal enough for the noise reduction effect that whole motor moves under various operating modes and various situation, the filter core centering high frequency noise of air-strainer can not well be eliminated.
[summary of the invention]
The purpose of this utility model is to provide a kind of new automobile engine aspirating system impedance complex formula sound-attenuating system, can reduce the inflow noise of motor in all band.
The technological scheme that the utility model is adopted in order to achieve the above object is: a kind of impedance complex formula sound-attenuating system that is used for automotive engine air intake system, comprise that order is distributed in a plurality of silencing apparatuss on the air inlet duct, each silencing apparatus all has specific frequency of noise elimination, and the distribution of the frequency of noise elimination after a plurality of silencing apparatus combinations and the frequency noise of motor distribute close.
A plurality of silencing apparatuss comprise an air-strainer, a resonant cavity, a resonance type muffler device and a resistance type silencing apparatus; Air-strainer is positioned at the end of suction tude near motor, connects resonant cavity, resonance type muffler device and dissipative muffler thereafter successively.
Resonant cavity includes two resonance type muffler devices and an intumescent silencing apparatus; Wherein the resonance type muffler device is arranged in the end of resonant cavity near motor, and its relative the other end is provided with the resonance type muffler device, and is an intumescent silencing apparatus between above-mentioned two resonance type muffler devices.
Along the engine charge direction, the resonant frequency of three resonator mufflers be successively comparatively speaking large and small and in.
Air-strainer comprises an intumescent silencing apparatus and a dissipative muffler; The intumescent silencing apparatus is the housing of air-strainer, and the filter paper that is positioned at wherein then is described dissipative muffler.
Be arranged in the suction port place that near the dissipative muffler of suction port is arranged on suction tude.
Impedance complex formula sound-attenuating system of the present utility model has adopted a plurality of dissipative mufflers and reactive muffler, each silencing apparatus all has specific frequency of noise elimination, the distribution of the frequency of noise elimination after a plurality of silencing apparatus combinations and the frequency noise of motor distribute close, thereby the novel impedance complex formula sound-attenuating system that is used for the automotive air intake system disclosed in the utility model has good all band noise elimination effect.
[description of drawings]
Fig. 1 is the resonance exhaust silencer principle schematic.
Fig. 2 is an expansion silencing apparatus principle schematic.
Fig. 3 is that sound-attenuating system is formed schematic representation.
Fig. 4 is the sound-attenuating system illustraton of model.
Fig. 5 is cavity resonator structures figure.
[embodiment]
Impedance complex formula sound-attenuating system of the present utility model has adopted dissipative muffler and reactive muffler, and wherein reactive muffler comprises resonator muffler and expansion silencing apparatus again.Resonator muffler is (as shown in Figure 1) that the principle of employing resonance elimination acoustic wave energy reaches the noise elimination purpose.Resonant cavity 8 itself has certain natural frequency, when the natural frequency of noise wave frequency and resonant cavity is close, will resonate, thereby part energy consumes, acoustic wave segment returns, has only fraction noise ripple to continue to propagate, thereby reaches the purpose of noise elimination.A is depicted as the noise waves direction of propagation among Fig. 1, and B is depicted as airintake direction; Solid line is depicted as sound wave, and dotted line is depicted as reflective sound wave, and dot and dash line is depicted as the sound wave that resonance consumes, and double dot dash line is depicted as the sound wave that continues propagation.What the expansion silencing apparatus adopted is the principle (as shown in Figure 2) that the sound wave expansion consumes.A is depicted as the noise waves direction of propagation among Fig. 2, and B is depicted as airintake direction; 9 are depicted as expansion chamber, and solid line is depicted as sound wave, and dot and dash line is depicted as the sound wave that continues propagation.Dotted line is depicted as the sound wave that diffusion consumes.Dissipative muffler is to utilize the sound-absorbing material in the silencing apparatus pipeline that is laid in to absorb acoustic energy, and the high-frequency sound wave of its centering has the effect of eliminating the noise preferably.
The system model figure of impedance complex formula sound-attenuating system of the present utility model sees Fig. 3, seven silencing apparatuss have been adopted altogether, wherein comprise an expansion silencing apparatus 1 and a dissipative muffler 2 in the air-strainer 11, wherein the housing of air-strainer is equivalent to an expansion silencing apparatus, this expansion silencing apparatus has certain slackening for the noise intensity of low frequency, the filter core of air-strainer then is equivalent to a dissipative muffler, and the noise elimination of its centering high frequency noise (greater than 300HZ) has certain effect; Comprise two resonator mufflers (shown in Figure 43 and 5) and an expansion silencing apparatus (shown in Figure 4 4) in the resonant cavity 12; Also be provided with a resonator muffler 6 in addition on the suction tude; Also be provided with a dissipative muffler 7 at the suction port place.Because the motor cabin is narrower, so,, silencing apparatus 3,4 and 5 done be in the same place for easily manufactured with in silencing apparatus 3,4 and 5 bodywork cavities that design between automobile the near front wheel and front bumper.The structural drawing of resonant cavity 12 is seen Fig. 5, and wherein silencing apparatus 4 is the expansion silencing apparatus, and the expansion chamber of a constant volume is arranged in the middle of air intake channel and air outlet pipe.Resonator muffler 6 designs are made up of the sealed tube that one one end and suction tude communicate on admission line.Dissipative muffler 7 also is arranged in the suction tude, is made by canvas, and the outside seals with Polypropylence Sheet.Silencing apparatus 3 and silencing apparatus 5 are resonator muffler, and the volume of silencing apparatus 5 is big than silencing apparatus 4, so less resonant frequency is arranged.Silencing apparatus 6 selects reactive muffler can obtain good noise elimination effect at the characteristics of low and medium frequency noise.The utility model has adopted 4 reactive mufflers to eliminate the noise waves of low and medium frequency, comprises three resonance qualitly silencing apparatuss and an intumescent silencing apparatus (not comprising the silencing apparatus on the air-strainer).Noise waves is at first by expansion silencing apparatus 1 and dissipative muffler 2 (being air-strainer 11), subsequently successively by resonator muffler 3, expansion silencing apparatus 4, resonator muffler 5 and resonator muffler 6 and dissipative muffler 7.
The main noise wave band (mainly forming) of motor car engine by mechanicalness noise, aerodynamic noise and combustion noise for 25Hz to 220Hz, and also have the high-order high frequency noise ripple of certain energy.Resonator muffler 3,5 and 6 natural frequency are 120Hz, 30Hz and 200Hz successively in the utility model, and the noise to corresponding band has the effect of eliminating the noise preferably separately; Two expansion silencing apparatuss 1 and the low-frequency noise of 4 centerings have the effect of eliminating the noise preferably; Add two dissipative mufflers 2 and 7 pairs of high frequency noise ripples slacken; It is close with the distribution of engine aspirating system frequency noise that the frequency of noise elimination of seven silencing apparatuss distributes, so this impedance complex formula sound-attenuating system can be good at reducing the noise of engine aspirating system.

Claims (6)

1. the impedance complex formula sound-attenuating system of a new automobile engine aspirating system, it is characterized in that, comprise the silencing apparatus combination that frequency of noise elimination is close with the engine noise frequency distribution, described silencing apparatus combination comprises a plurality of silencing apparatuss with specific frequency of noise elimination, and described silencing apparatus is distributed on the air inlet duct of motor in proper order.
2. impedance complex formula sound-attenuating system according to claim 1 is characterized in that described a plurality of silencing apparatus comprises an air-strainer (11), a resonant cavity (12), a resonance type muffler device (6) and a resistance type silencing apparatus (7); Described air-strainer (11) is positioned at the end of suction tude near motor (10), connects resonant cavity (12), resonance type muffler device (6) and dissipative muffler (7) thereafter successively.
3. impedance complex formula sound-attenuating system according to claim 2 is characterized in that wherein resonant cavity (12) includes two resonance type muffler devices (3,5) and an intumescent silencing apparatus (4); Wherein resonance type muffler device (3) is arranged in the end of resonant cavity (12) near motor (10), and its relative the other end is provided with resonance type muffler device (5), and is intumescent silencing apparatus (4) between above-mentioned two resonance type muffler devices (3,5).
4. impedance complex formula muffler system according to claim 3 is characterized in that: along motor (10) airintake direction, the resonant frequency of three resonator mufflers (6,5,3) be successively comparatively speaking large and small and in.
5. impedance complex formula sound-attenuating system according to claim 2 is characterized in that wherein air-strainer (11) comprises an intumescent silencing apparatus (1) and a dissipative muffler (2); Described intumescent silencing apparatus (1) is the housing of air-strainer (11), be positioned at wherein filter core then be described dissipative muffler (2).
6. impedance complex formula sound-attenuating system according to claim 2 is characterized in that dissipative muffler (7) wherein is arranged on the suction port place.
CNU2006200165467U 2006-12-14 2006-12-14 A novel impedance compound muffling system for car engine air supply system Expired - Lifetime CN201021648Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2006200165467U CN201021648Y (en) 2006-12-14 2006-12-14 A novel impedance compound muffling system for car engine air supply system

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104791159A (en) * 2015-03-13 2015-07-22 浙江海德曼过滤技术有限公司 Multi-level cyclone pipe type engineering machinery air filter
CN106286045A (en) * 2015-06-23 2017-01-04 华晨汽车集团控股有限公司 Engine with supercharger noise reduction gas handling system
CN107152358A (en) * 2017-06-13 2017-09-12 柳州柳工挖掘机有限公司 Engineering machinery intake noise reduction device
CN109695523A (en) * 2017-10-23 2019-04-30 本田技研工业株式会社 The inlet duct of internal combustion engine
CN110425143A (en) * 2019-07-31 2019-11-08 奇瑞商用车(安徽)有限公司 A kind of fuel-cell vehicle air assist system silencing apparatus and its mounting structure

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104791159A (en) * 2015-03-13 2015-07-22 浙江海德曼过滤技术有限公司 Multi-level cyclone pipe type engineering machinery air filter
CN106286045A (en) * 2015-06-23 2017-01-04 华晨汽车集团控股有限公司 Engine with supercharger noise reduction gas handling system
CN107152358A (en) * 2017-06-13 2017-09-12 柳州柳工挖掘机有限公司 Engineering machinery intake noise reduction device
CN109695523A (en) * 2017-10-23 2019-04-30 本田技研工业株式会社 The inlet duct of internal combustion engine
CN109695523B (en) * 2017-10-23 2021-02-23 本田技研工业株式会社 Air intake device for internal combustion engine
CN110425143A (en) * 2019-07-31 2019-11-08 奇瑞商用车(安徽)有限公司 A kind of fuel-cell vehicle air assist system silencing apparatus and its mounting structure

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Granted publication date: 20080213

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