CN201050396Y - Vehicular silencer - Google Patents
Vehicular silencer Download PDFInfo
- Publication number
- CN201050396Y CN201050396Y CNU2007201422858U CN200720142285U CN201050396Y CN 201050396 Y CN201050396 Y CN 201050396Y CN U2007201422858 U CNU2007201422858 U CN U2007201422858U CN 200720142285 U CN200720142285 U CN 200720142285U CN 201050396 Y CN201050396 Y CN 201050396Y
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- Prior art keywords
- chamber
- outlet pipe
- steam outlet
- port
- suction tude
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- Expired - Lifetime
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Abstract
Disclosed is a muffler for vehicle, which comprises a shell (1), an air inlet pipe (4) and an air outlet pipe (5). Wherein, the utility model also comprises at least one baffle (2), a resonance tube (6) and a control valve (8). The outer edge of the at least one baffle (2) is connected closely with the inner wall of the shell (1); the inner part of the shell (1) is divided into at least two chambers (3) which are not communicated with each other; the air inlet pipe (4) is inserted into the shell (1) from one end of the shell (1); the air outlet pipe (5) is inserted into the shell (1) from the other end of the shell (1); via holes are arranged in circumferential direction on the pipe body of the air inlet pipe (4) arranged in the chamber in which the port of the air outlet pipe (5) is arranged; the control valve (8) seals a port (6A) at one end of the resonance tube (6) through an eccentric compression part. According to the air displacement, the utility model can adjust automatically the area of the air passing, so as to adapt to the different working conditions of the engine, increase the muffling effect and decrease the displacement back pressure.
Description
Technical field
The utility model relates to a kind of silencer for automobile, more particularly, relates to a kind of engine exhaust muffler.
Background technique
General exhaust silencer reaches the noise elimination purpose by structure characteristic usually, and outlet pipe is a long tube, and constantly circuitous pitch of the laps encapsulates by housing again; Because outlet pipe is oval pipe, can not bending angle excessive (easily breaking), so must weld with bend pipe in the bending place, design is complicated, machining period is also many, and complex inner structure can make that air-flow is obstructed, increased exhaust back pressure greatly, thereby increased the power loss of power assembly.
For this reason, CN2871858 discloses a kind of automotive muffler, is made up of cylindrical shell, three dividing plates, suction tude, steam outlet pipe and forward and backward end caps.Dividing plate is separated into four chambers with cylindrical shell, suction tude puts in from cylindrical shell one end, end to the 3rd chamber through first, second, steam outlet pipe then passes second and third, picks out behind four chambers since first chamber, on suction tude, the steam outlet pipe and all have the micropore of some on the dividing plate, make first, second, third chamber form resonant cavity, and it is cotton to fill up sound absorption in the 4th chamber, form the noise elimination chamber, also be surrounded by Sound damping cover in steam outlet pipe posterior segment periphery simultaneously.Gas enters from suction tude, by the micropore on suction tude, steam outlet pipe and the dividing plate, flows between each chamber, discharges from outlet pipe at last.Though described silencing apparatus makes exhaust airstream flowing in noise elimination cavity more unimpeded, can reduce exhaust back pressure to a certain extent, but, when the rotating speed of motor raises or air displacement when increasing, satisfy the requirement of output power and discharge characteristic, need to increase the area that passes through of air-flow, and the area that air communication is crossed in this silencing apparatus is constant all the time, thereby meeting is reduced the noise elimination effect, increases exhaust back pressure.
The model utility content
The purpose of this utility model is that to overcome the area that air communication is crossed in the silencing apparatus in the prior art constant all the time, when increasing, air displacement can reduce the shortcoming of noise elimination effect, increase exhaust back pressure, a kind of semi-active type silencing apparatus is provided, can adjust the area that air communication is crossed automatically according to the size of air displacement, thereby the different operating modes that adapt to motor improve the noise elimination effect, reduce exhaust back pressure.
A kind of silencer for automobile that the utility model provides, this silencer for automobile comprise housing 1, suction tude 4 and steam outlet pipe 5; Wherein, described silencer for automobile also comprises at least one dividing plate 2, resonatron 6 and control valve 8; The outer rim of described at least one dividing plate 2 is connected with the inwall of described housing 1 is airtight, and the inside of housing 1 is divided into disconnected at least two chambers 3 mutually; Described suction tude 4 is inserted from housing 1 one ends, and passes at least one chamber 3, extends at least in the next chamber 3; Steam outlet pipe 5 inserts from housing 1 the other end, and passes at least one chamber 3, extends at least in the next chamber 3; Steam outlet pipe 5 ports that are positioned at suction tude 4 ports of housing and are positioned at housing are not at same chamber, and suction tude 4 is arranged in same chamber with steam outlet pipe 5 at least a portion; Be arranged in steam outlet pipe 5 port places chamber suction tude 4 bodys circumferentially be furnished with through hole; One end of resonatron 6 is arranged in the chamber at suction tude 4 port places, and the other end is arranged in the chamber at steam outlet pipe 5 port places; Described control valve 8 is arranged in the resonatron 6 port 6A of the chamber at steam outlet pipe 5 port places by the biasing element sealing.
In the silencer for automobile that the utility model provides, control valve 8 can change its unlatching or closed condition according to the rotating speed of motor.When engine speed is low, exhaust airstream can not be washed control valve 8 open, control valve 8 continues sealing resonatron 6 under the effect of biasing element, the chamber and the resonatron at the port place of suction tude 4 form enclosed cavity jointly at this moment, its effect is equal to and a conspicuous female Huo Zi silencing apparatus, medium and low frequency noise to exhaust well filters, and it is effective to eliminate the noise.When engine speed was higher, exhaust airstream overcame the active force of biasing element, and control valve 8 is opened, and air-flow can enter steam outlet pipe 5 by resonatron 6 circulations, and the exhaust circulation resistance reduces, so power loss reduces.After control valve 8 is opened, engine combustion in the tail pipe and the exhaust sound that produces increases, but vapour lock reduces, the noise that gas current friction produces relatively also reduces, when high rotating speed, the frictional noise of gas is the main component of exhaust sound, so the overall noise amount reduces on the contrary.So the silencing apparatus that the utility model provides comes the control valve switch by the engine exhaust air-flow, can adjust the area that air communication is crossed automatically according to the size of air displacement, thereby the different operating modes that adapt to motor, it is constant all the time to have solved the area that air communication is crossed in the silencing apparatus, can reduce the problem of noise elimination effect, increase exhaust back pressure when the engine exhaust amount increases.
Description of drawings
Fig. 1 and Fig. 8 are the structural representations of the silencing apparatus that provides of the utility model;
Fig. 2 is the control valve scheme of installation of the silencing apparatus that provides of the utility model;
Fig. 3 is the stream condition schematic representation of silencing apparatus when engine low rotation speed that the utility model provides;
Fig. 4 is the stream condition schematic representation of silencing apparatus when the high rotating speed of motor that the utility model provides;
Fig. 5 is the noise curve of the silencing apparatus that provides of the utility model in valve opening, closed condition;
Fig. 6 is the pressure diagram of the silencing apparatus that provides of the utility model in valve opening, closed condition;
Fig. 7 is resistive jar a sectional view.
Embodiment
Below in conjunction with accompanying drawing preferred implementation of the present utility model is elaborated.
As shown in Figure 1, a kind of silencer for automobile that the utility model provides, this silencer for automobile comprise housing 1, suction tude 4 and steam outlet pipe 5; Wherein, described silencer for automobile also comprises at least one dividing plate 2, resonatron 6 and control valve 8; The outer rim of described at least one dividing plate 2 is connected with the inwall of described housing 1 is airtight, and the inside of housing 1 is divided into disconnected at least two chambers 3 mutually; Described suction tude 4 is inserted from housing 1 one ends, and passes at least one chamber 3, extends at least in the next chamber 3; Steam outlet pipe 5 inserts from housing 1 the other end, and passes at least one chamber 3, extends at least in the next chamber 3; Steam outlet pipe 5 ports that are positioned at suction tude 4 ports of housing and are positioned at housing are not at same chamber, and suction tude 4 is arranged in same chamber with steam outlet pipe 5 at least a portion; Be arranged in steam outlet pipe 5 port places chamber suction tude 4 bodys circumferentially be furnished with through hole; One end of resonatron 6 is arranged in the chamber at suction tude 4 port places, and the other end is arranged in the chamber at steam outlet pipe 5 port places; Described control valve 8 is arranged in the resonatron 6 port 6A of the chamber at steam outlet pipe 5 port places by the biasing element sealing.
The silencing apparatus that the utility model provides comes the control valve switch by the engine exhaust air-flow, can adjust the area that air communication is crossed automatically according to the size of air displacement, thereby the different operating modes that adapt to motor, it is constant all the time to have solved the area that air communication is crossed in the silencing apparatus, can reduce the problem of noise elimination effect, increase exhaust back pressure when the engine exhaust amount increases.
Fig. 2 is a control valve mounting arrangements schematic representation, and its middle shell 1 end cap shrouding is not shown.Be provided with the biasing element (not shown) in the bearing pin 8A, described biasing element makes valve 8B sealing be arranged in the resonatron 6 port 6A of the chamber at steam outlet pipe 5 port places with mode control valve 8B well known in the art.
When motor during at middle and slow speed of revolution, exhaust airstream is little, and the exhaust airstream state as shown in Figure 3.Air-flow is entered by suction tude 4, through the through hole shunting of body circumferential arrangement, enters steam outlet pipe 5 then and discharges.At this moment, because engine speed is lower, exhaust airstream can not be washed valve 8B open, valve 8B continues sealing resonatron 6 under spring side, the chamber and the resonatron at the port place of suction tude 4 form enclosed cavity jointly at this moment, its effect is equal to and a conspicuous female Huo Zi silencing apparatus, and the medium and low frequency noise of exhaust is well filtered, and it is effective to eliminate the noise.
Engine speed raises, and exhaust airstream overcomes spring force gradually, and valve 8B begins to open, when reaching certain rotating speed, and the valve complete opening, the exhaust airstream state is as shown in Figure 4.This stage air-flow can enter steam outlet pipe 5 by resonatron 6 circulations, and the exhaust circulation resistance reduces, so power loss reduces.After valve 8B opens, engine combustion in the tail pipe and the exhaust sound that produces increases, but vapour lock reduces, the noise that gas current friction produces relatively also reduces, when high rotating speed, the frictional noise of gas is the main component of exhaust sound, so the overall noise amount reduces on the contrary.
After the vent systems that is respectively Fig. 5, Fig. 6 adopts silencing apparatus of the present utility model, noise curve and pressure diagram when valve closing and unlatching.Can draw from figure, when engine speed was low, if valve closing, then noise was lower, and when engine speed was high, if valve opening, then noise was lower, and exhaust back pressure has also descended much simultaneously.Therefore, the utility model is throttle down when the slow-speed of revolution, then opens valve when high rotating speed, thereby can adapt to the different operating modes of motor, improves the noise elimination effect effectively, reduces exhaust back pressure.
The engine speed turning point of control valve switch can be by the rigidity that changes biasing element flexible design.Because the highest safety and stability rotating speed of gasoline reciprocating engine is substantially all about 6000r/min, therefore generally this rotating speed turning point is set to the intermediate speed 3000 ± 50r/min of motor.
According to the utility model, under the preferable case, the outside of the body portion of steam outlet pipe 5 in first chamber of its insertion housing 1 is surrounded by resistive jar 7, and described resistive jar 7 is built-in with resistive quieter material 9.Fig. 7 is resistive jar 7 a sectional view.Thereby can come further the high-frequency noise of filtering exhaust effectively by resistance noise reduction.
According to the utility model, under the preferable case, as shown in Figure 1, described steam outlet pipe 5 be arranged in the port tube body portion of chamber, port tube body portion, resonatron 6 that described suction tude 4 is arranged in chamber be arranged in suction tude 4 port places chamber the port tube body portion and be arranged in the suction tude 4 non-port bodys and the steam outlet pipe 5 non-port tube body portions of same chamber, what have a part at least circumferentially is furnished with through hole.Because the air-flow from then on through hole of the circumferential arrangement of part body passes through, and has increased the circulation area of air-flow, therefore can further play the effect of decompression noise reduction.
In the utility model, the size that can coordinate each chamber in the housing 1 is so that whole silencing apparatus reasonably stability, under the preferable case, the chamber volume at suction tude 4 port places account for housing 1 total volume 1/3 to 1/4, thereby can be so that valve 8B be when closing, improve the chamber at port place of suction tude 4 and the noise elimination effect of the common enclosed cavity that forms of resonatron.
According to the utility model, under the preferable case, the ratio of the pipe diameter of suction tude 4, steam outlet pipe 5 and resonatron 6 is 1: 0.5-2: 0.5-2, under the preferable case, suction tude 4 and steam outlet pipe 5 every section has in the body of through hole, the through hole gross area accounts for 1/5 to 1/4 of every section outer surface of tube body gross area, thereby optimizes the noise elimination effect of silencing apparatus.As long as the size of described through hole satisfies the requirement of actual exhaust air pressure, the diameter of described through hole is preferably 2mm-15mm, more preferably 5mm-10mm.
According to the utility model, those skilled in the art is easy to just to expect increasing and decreasing according to actual conditions the number of dividing plate, to optimize the noise elimination effect of silencing apparatus.Increase the dividing plate number and can strengthen support, thereby improve the stability of acoustic wave filter structure, and then further improve the noise elimination effect of the silencer for automobile that the utility model provides suction tude 4, steam outlet pipe 5 and resonatron 6; And reduce the structure that the dividing plate number can be simplified silencing apparatus, alleviate the weight of silencing apparatus.The number of common described dividing plate 2 can be 1-10, is 1-5 under the preferable case.
Among the embodiment as shown in Figure 1, the number of described dividing plate 2 is one, and this moment, the outer rim of a described dividing plate 2 was connected with the inwall of described housing 1 is airtight, and the inside of housing 1 is divided into disconnected two chambers 3 mutually; Described suction tude 4 is inserted from housing 1 one ends, and passes a chamber 3, extends in the next chamber 3; Steam outlet pipe 5 inserts from housing 1 the other end, and passes a chamber 3, extends in the next chamber 3; Be arranged in steam outlet pipe 5 port places chamber suction tude 4 bodys circumferentially be furnished with through hole; One end of resonatron 6 is arranged in the chamber at suction tude 4 port places, and the other end is arranged in the chamber at steam outlet pipe 5 port places; Described control valve 8 is arranged in the resonatron 6 port 6A of the chamber at steam outlet pipe 5 port places by the biasing element sealing.
Among the embodiment as shown in Figure 8, the number of described dividing plate 2 is two, and this moment, the outer rim of described two dividing plates 2 was connected with the inwall of described housing 1 is airtight, and the inside of housing 1 is divided into disconnected three chambers 3 mutually; Described suction tude 4 is inserted from housing 1 one ends, and passes at least one chamber 3, extends at least in the next chamber 3, and as a specific embodiment, this port passes two chambers 3, extends to from the 3rd chamber 3 that suction tude 4 insertion ends are started at; Steam outlet pipe 5 inserts from housing 1 the other end, and passes at least one chamber 3, extends at least in the next chamber 3, and as a specific embodiment, this port passes two chambers 3, extends to from the 3rd chamber 3 that steam outlet pipe 5 insertion ends are started at; Be arranged in steam outlet pipe 5 port places chamber suction tude 4 bodys circumferentially be furnished with through hole; One end of resonatron 6 is arranged in the chamber at suction tude 4 port places, and the other end is arranged in the chamber at steam outlet pipe 5 port places; Described control valve 8 is arranged in the resonatron 6 port 6A of the chamber at steam outlet pipe 5 port places by the biasing element sealing.
Claims (8)
1. silencer for automobile, this silencer for automobile comprises housing (1), suction tude (4) and steam outlet pipe (5); It is characterized in that described silencer for automobile also comprises at least one dividing plate (2), resonatron (6) and control valve (8); The airtight connection of inwall of the outer rim of described at least one dividing plate (2) and described housing (1), and the inside of housing (1) is divided into disconnected at least two chambers (3) mutually; Described suction tude (4) is inserted from housing (1) one end, and passes at least one chamber (3), extends at least in the next chamber (3); Steam outlet pipe (5) inserts from housing (1) the other end, and passes at least one chamber (3), extends at least in the next chamber (3); Steam outlet pipe (5) port that is positioned at suction tude (4) port of housing and is positioned at housing is not at same chamber, and suction tude (4) is arranged in same chamber with steam outlet pipe (5) at least a portion; Be arranged in steam outlet pipe (5) port place chamber suction tude (4) body circumferentially be furnished with through hole; One end of resonatron (6) is arranged in the chamber at suction tude (4) port place, and the other end is arranged in the chamber at steam outlet pipe (5) port place; Described control valve (8) is arranged in resonatron (6) port (6A) of the chamber at steam outlet pipe (5) port place by the biasing element sealing.
2. silencer for automobile according to claim 1, it is characterized in that, described control valve (8) comprises bearing pin (8A) and the pivotally connected valve (8B) on bearing pin (8A) that is fixed in the housing (1), and described valve (8B) is arranged in resonatron (6) port (6A) of the chamber at steam outlet pipe (5) port place by described biasing element sealing.
3. silencer for automobile according to claim 1 is characterized in that, the outside of the body portion of steam outlet pipe (5) in first chamber of its insertion housing (1) is surrounded by resistive jar (7), and described resistive jar (7) are built-in with resistive quieter material.
4. silencer for automobile according to claim 1, it is characterized in that, described steam outlet pipe (5) be arranged in port tube body portion, resonatron (6) that the port tube body portion of chamber, described suction tude (4) be arranged in chamber be arranged in suction tude (4) port place chamber the port tube body portion and be arranged in the non-port body of suction tude (4) and the non-port tube body portion of steam outlet pipe (5) of same chamber, what have a part at least circumferentially is furnished with through hole.
5. silencer for automobile according to claim 1 is characterized in that, the chamber volume at suction tude (4) port place account for housing (1) total volume 1/3 to 1/4.
6. silencer for automobile according to claim 1 is characterized in that, the ratio of the pipe diameter of suction tude (4), steam outlet pipe (5) and resonatron (6) is 1: 0.5-2: 0.5-2.
7. silencer for automobile according to claim 1 is characterized in that, suction tude (4) and steam outlet pipe (5) every section has in the body of through hole, and the through hole gross area accounts for 1/5 to 1/4 of every section outer surface of tube body gross area.
8. silencer for automobile according to claim 1 is characterized in that, the number of described dividing plate (2) is 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201422858U CN201050396Y (en) | 2007-04-30 | 2007-04-30 | Vehicular silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201422858U CN201050396Y (en) | 2007-04-30 | 2007-04-30 | Vehicular silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201050396Y true CN201050396Y (en) | 2008-04-23 |
Family
ID=39336882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201422858U Expired - Lifetime CN201050396Y (en) | 2007-04-30 | 2007-04-30 | Vehicular silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201050396Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266934A (en) * | 2013-05-07 | 2013-08-28 | 高鸣峰 | Silencer |
| CN103696840A (en) * | 2014-01-03 | 2014-04-02 | 清华大学苏州汽车研究院（相城） | Muffler |
-
2007
- 2007-04-30 CN CNU2007201422858U patent/CN201050396Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266934A (en) * | 2013-05-07 | 2013-08-28 | 高鸣峰 | Silencer |
| CN103266934B (en) * | 2013-05-07 | 2016-04-13 | 高鸣峰 | Silencing apparatus |
| CN103696840A (en) * | 2014-01-03 | 2014-04-02 | 清华大学苏州汽车研究院（相城） | Muffler |
| CN103696840B (en) * | 2014-01-03 | 2016-03-23 | 清华大学苏州汽车研究院（相城） | A kind of silencing apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen BYD Auto Co., Ltd. Assignor: Biyadi Co., Ltd. Contract fulfillment period: 2008.4.25 to 2016.7.11 Contract record no.: 2008440000079 Denomination of utility model: Automobile muffler Granted publication date: 20080423 License type: General permission Record date: 20080513 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: COMMON LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.4.25 TO 2016.7.11 Name of requester: BIYADI AUTOMOBILE CO., LTD., SHENZHEN CITY Effective date: 20080513 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080423 |
|
| CX01 | Expiry of patent term |