CN2462079Y - Multi-chamber parallel by pass resonance silencer - Google Patents
Multi-chamber parallel by pass resonance silencer Download PDFInfo
- Publication number
- CN2462079Y CN2462079Y CN 00264613 CN00264613U CN2462079Y CN 2462079 Y CN2462079 Y CN 2462079Y CN 00264613 CN00264613 CN 00264613 CN 00264613 U CN00264613 U CN 00264613U CN 2462079 Y CN2462079 Y CN 2462079Y
- Authority
- CN
- China
- Prior art keywords
- air intake
- combustion engine
- resonant cavity
- resonant
- noise
- 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.)
- Expired - Fee Related
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Exhaust Silencers (AREA)
Abstract
The utility model relates to a multi-chamber parallel offset resonant silencer used for air intake systems of an internal combustion engine of vehicles. The utility model comprises an air intake pipe and at least two resonant cavities which are arranged in parallel; the resonant cavities are arranged in a casing; each resonant cavity can be orderly connected with radial through holes axially arranged on the air intake pipe through conduit pipes. The size of the radial through holes and the conduit pipes can be designed in a matched way according to the air intake spectrum of the internal combustion engine. The silencer not only can greatly reduce air intake noise, but also can increase the power of the internal combustion engine, having a smaller volume.
Description
The utility model belongs to the The automobile noise control technical field, is specifically related to a kind of collateral branch's formula resonant silencing device that is used on the car combustion engine gas handling system.
Noise pollution is one of current society three big public hazards, and automobile noise is to influence primary pollution source the most widely.Countries in the world are all very paid attention to the control of automobile noise, can take various special control measure at the separate sources and the genesis mechanism of automobile noise.Common silencing apparatus has vortex type, electronic type, catalytic purification formula or installs forms such as foam etc. additional.But these silencing apparatus functions are more single, only have a noise elimination function.
The purpose of this utility model is at above shortcomings in the prior art, carry out the genesis mechanism and the frequency compositing characteristic of noise according to car combustion engine, provide a kind of collateral branch type resonance exhaust silencer according to Helmholtz resonant cavity principle, can significantly reduce induction noise, the effect that improves power of IC engine is arranged again.
The technical solution of the utility model is as follows:
Multi-cavity collateral branch in parallel type resonance exhaust silencer comprises suction tude, it is characterized in that being arranged in parallel at least two resonant cavities, and each resonant cavity connects the radial direction through hole that axially is provided with on the suction tude successively by conduit.
The quantity of described resonant cavity is preferably 2-4.
The size of radial direction through hole and conduit is come matching Design according to the air-intake of combustion engine noise spectrum.
Described resonant cavity places in the housing.
This silencing apparatus is by changing the diameter and the length of radial direction through hole and corresponding pipe, promptly change the volume of resonant cavity and conduit thereof, each resonant cavity can be designed to have the acoustic characteristics of the very big resonance peak of half-band width, easily the frequency of noise elimination characteristic of resonant cavity and the frequency spectrum of air-intake of combustion engine noise are mated, and sufficiently high sound deadening capacity is arranged.The quantity of resonant cavity is consistent with the quantity of engine charge noise peak.The air whirl noise that comes from each air intake valve place of motor, the cross section that runs at least two acoustic impedances sudden changes of this device formation can take place repeatedly to reflect, particularly when noise frequency falls into the resonance zone of certain resonant cavity of this device, to cause the judder of gas column in the respective resonant cavities conduit pipe, and because of a large amount of sound energy consumptions that rub, thereby reach the purpose of remarkable reduction induction noise.
Advantage of the present utility model is as follows:
1. thereby it is big and can increase the characteristic that charging efficiency increases engine power simultaneously all to have sound deadening capacity in the whole working speed scope of internal-combustion engine.
2. at least two in parallel uses of resonant cavity are designed change easily and are realized different frequency of noise elimination characteristics, also obtain bigger sound deadening capacity easily, thereby guarantee to satisfy the noise reduction requirement of various air-intake of combustion engine noises.
3. resonant cavity is made one, can efficiently utilize the space, thereby reduce the boundary dimension of this device.
4. this device can use moulding, has characteristics in light weight, that cost is low.
Below in conjunction with drawings and Examples the utility model is described further.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the left-hand view of Fig. 1.
Fig. 3 is a scheme of installation of the present utility model.
Should this device be used for the JL368Q3 motor with in the example.Because the induction noise peak value of this motor has three, therefore select three resonant cavities herein for use.As Figure 1-3, this silencing apparatus 6 otherly be loaded on after the air-intake of combustion engine air-strainer 7, on the admission line 4 before the intake manifold 8.Be arranged in parallel in housing 5 offering 3, three Helmholtz resonant cavities 1 of three radial direction through hole on the suction tude 4 vertically in turn, each resonant cavity 1 conduit 2 by separately respectively links to each other with three radial direction through hole 3 successively.Three chamber parallel-connection structures of its uniqueness make its resonant silencing scope cover the crest frequency zone of three cylinder four-stroke petrol engine induction noises just.
After tested, near the 10-20dB that descended of the sound intensity value suction port illustrates that the induction noise of this motor declines to a great extent, and changes as shown in the tablely at the output torque of whole working speed scope intrinsic motivation, and visible engine power slightly rises.
| Rotating speed (rpm) | 5500 | 5000 | 4500 | 4000 | 3500 | 3000 | 2500 |
| Output torque (N.m) before improving | 38.12 | 42.84 | 45.08 | 49.26 | 49.57 | 45.31 | 44.33 |
| Improve back output torque (N.m) | 38.67 | 43.24 | 44.45 | 44.27 | 47.63 | 46.71 | 45.11 |
| Engine power increment (KW) | 0.55 | 0.4 | -0.63 | -4.99 | -1.94 | 1.4 | 0.78 |
| Engine power gaining rate (KW) | 0.32 | 0.21 | -0.30 | -2.10 | -0.71 | 0.44 | 0.20 |
Claims (4)
1. multi-cavity collateral branch in parallel type resonance exhaust silencer comprises suction tude, it is characterized in that being arranged in parallel at least two resonant cavities, and each resonant cavity connects the radial direction through hole that axially is provided with on the suction tude successively by conduit.
2. silencing apparatus according to claim 1 is characterized in that described resonant cavity is 2-4.
3. silencing apparatus according to claim 1 and 2 is characterized in that the size of radial direction through hole and conduit is come matching Design according to the air-intake of combustion engine noise spectrum.
4. silencing apparatus according to claim 1 and 2 is characterized in that described resonant cavity places in the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00264613 CN2462079Y (en) | 2000-12-28 | 2000-12-28 | Multi-chamber parallel by pass resonance silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00264613 CN2462079Y (en) | 2000-12-28 | 2000-12-28 | Multi-chamber parallel by pass resonance silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2462079Y true CN2462079Y (en) | 2001-11-28 |
Family
ID=33619245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00264613 Expired - Fee Related CN2462079Y (en) | 2000-12-28 | 2000-12-28 | Multi-chamber parallel by pass resonance silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2462079Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005889A (en) * | 2014-06-13 | 2014-08-27 | 成都万友滤机有限公司 | Combined resonator |
| CN108615520A (en) * | 2016-12-13 | 2018-10-02 | 航天特种材料及工艺技术研究所 | A kind of sound-absorbing material and preparation method thereof based on more hierarchical structures |
-
2000
- 2000-12-28 CN CN 00264613 patent/CN2462079Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005889A (en) * | 2014-06-13 | 2014-08-27 | 成都万友滤机有限公司 | Combined resonator |
| CN108615520A (en) * | 2016-12-13 | 2018-10-02 | 航天特种材料及工艺技术研究所 | A kind of sound-absorbing material and preparation method thereof based on more hierarchical structures |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |