CN101813017B - Exhaust muffler capable of automatically adjusting overflow area - Google Patents
Exhaust muffler capable of automatically adjusting overflow area Download PDFInfo
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- CN101813017B CN101813017B CN2010101516029A CN201010151602A CN101813017B CN 101813017 B CN101813017 B CN 101813017B CN 2010101516029 A CN2010101516029 A CN 2010101516029A CN 201010151602 A CN201010151602 A CN 201010151602A CN 101813017 B CN101813017 B CN 101813017B
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- piston
- muffler
- exhaust
- suction tude
- baffler
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Abstract
The invention discloses an exhaust muffler capable of automatically adjusting the overflow area, which comprises an air inlet pipe, an expansion chamber and an air outlet pipe, wherein the inner circle of the section (provided with radial through-holes) of the air inlet pipe is provided with a piston which can slide to and fro along the inner wall of the pipe, and the front end of the piston faces the air inlet direction, while the rear end is provided with a pressure spring which can apply pressure (with a direction opposite to the air inlet direction) to the rear end. The invention adopts a structure that the exhaust pipe section of the air inlet pipe is provided with the piston which divides the exhaust pipe section into an exhaust part and a closed part, the position of the piston can be automatically adjusted according to the exhaust pressure and the piston can reset under the action of the spring when the exhaust pressure is low; therefore, the exhaust muffler has the advantages of adjusting the area of the airflow ventilating section according to the exhaust gas flow of an engine under different working conditions, keeping the exhaust airflow in an even flow velocity, effectively lowering the exhaust backpressure, reducing the regenerated noise of the airflow, improving the erasure effect of the muffler, and having a positive significance for reducing the fuel consumption and carbon dioxide emission of an automobile.
Description
Technical field
The present invention relates to a kind of automobile appurtenances, particularly a kind of muffler of automatic adjusting area of passage.
Background technique
Traffic noise is the noise that produces by in the motor-driven vehicle going process, is main noise source comparatively in the urban environment noise; And the automobile exhaust noise is the main noise source of automobile noise, also is the emphasis in the urban environment noise control.
For reducing exhaust sound, Motor Vehicle generally adopts muffler to carry out exhaust, and baffler also is the most effectively noise reduction means that the control exhaust sound generally adopts.In the existing technology, the performance muffler of all basically engine exhaust bafflers depends on fixing structural parameter, and the noise reduction frequency can not automatically adjust with the variation of engine operating condition, is in passivity all the time; And the extraction flow of motor is to change along with the change of operating mode; Particularly bring extraction flow to increase because engine speed raises simultaneously, and the airflow section area of baffler is changeless, will cause flow velocity too high; Not only cause bigger air-flow regenerated noise; Reduce baffler noise reduction ability, and cause exhaust back pressure excessive, increase oil consumption.For overcoming the above problems, a kind of bypass valve that utilizes occurred and realized that the baffler internal structure change realizes reducing the back of the body by functions such as pressure, flow velocitys.But the subject matter that this device exists is that structure is comparatively complicated, and can't regulate the airflow section area, can not fundamentally solve the noise problem of baffler under big extraction flow situation.
Therefore, need a kind of muffler, can be according to the extraction flow adjustment airflow section area of motor under different operating modes; Make exhaust airstream keep even flow; Effectively reduce exhaust back pressure, reduce the air-flow regenerated noise, improve the erasure effect of baffler.
Summary of the invention
In view of this; The muffler that the purpose of this invention is to provide a kind of automatic adjusting area of passage; Can make exhaust airstream keep even flow according to the extraction flow adjustment airflow section area of motor under different operating modes, effectively reduce exhaust back pressure; Reduce the air-flow regenerated noise, improve the erasure effect of baffler.
The muffler of automatic adjusting area of passage of the present invention; Comprise baffler suction tude, expansion cavity and muffler tail pipe; Said baffler suction tude is communicated in the engine exhaust exhaust port through suction port, is communicated in expansion cavity through relief opening, and muffler tail pipe is communicated in expansion cavity through suction port; The relief opening of said baffler suction tude is the radial direction through hole that is distributed on the baffler suction tude tube wall; Said baffler suction tude is provided with circle in the pipeline section of radial direction through hole and is provided with the piston that can reciprocatingly slide along inner tube wall, and said piston nose is met to airintake direction, and the rear end is provided with and can applies the stage clip with the airintake direction reverse pressure to it.
Further, said baffler suction tude tail end seals and is provided with in connecting tube and the air inlet equalizing orifice of expansion cavity, and said stage clip tail end withstands baffler suction tude tail end sealing part, and front end withstands piston;
Further, also comprise guide rod, said piston rear end is provided with the openings lead groove vertically; Be placed in the baffler suction tude in the said guide rod, tail end is fixed in baffler suction tude tail end sealing part, and front end is coaxial to be stretched into the guiding groove of piston and cooperate with the mode that can reciprocatingly slide vertically with it;
Further, said guiding groove bottom land is provided with and is communicated in the guiding groove groove and the outer balance channel of groove, and the outer opening of the groove of said balance channel is positioned at the rear end of piston;
Further, the bottom land of said guiding groove with cushion pad is set;
Further, the longitudinal cross-section of said piston is pre-large post-small hierarchic structure;
Further, the cross section of said expansion cavity is oval; Muffler tail pipe is a horn mouth through suction port;
Further, said baffler suction tude tail end is fixedly connected the rear end cover formation seal structure of expansion cavity;
Further, setpoint distance and seal between the rear end cover of said baffler suction tude tail end and expansion cavity through end cap;
Further, said piston nose face is cambered surface or the plane that seamlessly transits.
The invention has the beneficial effects as follows: the muffler of automatic adjusting area of passage of the present invention, the exhaust pipeline section that is employed in suction tude is provided with structure of piston, and the exhaust pipeline section is divided into discharge portion and closed portion; Piston can be adjusted the position automatically according to the size of exhaust pressure; And when exhaust pressure is little under spring action return, thereby can make exhaust airstream keep even flow according to the extraction flow adjustment airflow section area of motor under different operating modes; Effectively reduce exhaust back pressure; Reduce the air-flow regenerated noise, improve the erasure effect of baffler, and positive effect is all arranged reducing automobile fuel consumption and CO2 emission.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Fig. 1 is first kind of example structure schematic representation of the present invention;
Fig. 2 is piston and guide rod cooperating structure enlarged view;
Fig. 3 is that the piston that seamlessly transits the cambered surface end face cooperates enlarged view with guide rod;
Fig. 4 is second kind of example structure schematic representation of the present invention.
Embodiment
Embodiment one
Fig. 1 is first kind of example structure schematic representation of the present invention; Fig. 2 is piston and guide rod cooperating structure enlarged view; Fig. 3 is that the piston that seamlessly transits the cambered surface end face cooperates enlarged view with guide rod; As shown in the figure: the muffler of the automatic adjusting area of passage of present embodiment, comprise baffler suction tude 2, expansion cavity 1 and muffler tail pipe 3, said baffler suction tude 2 is communicated in the engine exhaust exhaust port through suction port; Be communicated in expansion cavity 1 through relief opening; Muffler tail pipe 3 is communicated in expansion cavity 1 through suction port 3a, and the relief opening of said baffler suction tude 2 is the radial direction through hole 4 that is distributed on baffler suction tude 2 tube walls, and said baffler suction tude 2 is provided with circle in the pipeline section of radial direction through hole 4 and is provided with the piston 5 that can reciprocatingly slide along inner tube wall; Said piston 5 front ends are met to airintake direction, and the rear end is provided with and can applies the stage clip 6 with the airintake direction reverse pressure to it; Said expansion cavity 1 comprises front cover 1a, rear end cover 1b and cylindrical shell 1c, and baffler suction tude 2 adopts welded seal to cooperate and passes front cover 1a, and muffler tail pipe 3 adopts welded seal to cooperate and passes rear end cover 1b.
The present invention is when extraction flow is big, and exhaust pressure can driven plunger 5 move backward, and radial direction through hole 4 quantity that are positioned at piston 5 front ends on the baffler suction tude 2 increase, and increase the gas area of passage; When exhaust pressure reduced, piston 5 moved forward under the effect of stage clip 6, and the cover part radial direction through hole reduces area of passage, thereby area of passage is changed along with the change of extraction flow.
In the present embodiment, muffler tail pipe 3 is a horn mouth through suction port 3a, can further reduce the generation of air-flow regenerated noise in the baffler, further reduces and passes to outside noise.
In the present embodiment, said baffler suction tude 2 tail ends seal and are provided with in connecting tube and the air inlet equalizing orifice 8 of expansion cavity 1, and said stage clip 6 tail ends withstand baffler suction tude 2 tail end sealing parts, and front end withstands piston 5; Through the tail end seal structure, be beneficial to the layout of spring, make compact structure of the present invention, be beneficial to the spring location, keep stability preferably; Simultaneously, space and expansion cavity air pressure inside between ability equalizing piston and the inlet tube are further eliminated the interference drag of piston motion, and are played certain damping function, are beneficial to further elimination noise.
In the present embodiment, also comprise guide rod 7, said piston 5 rear ends are provided with openings lead groove 5a vertically; Be placed in baffler suction tude 2 in the said guide rod 7, tail end is fixed in baffler suction tude 2 tail end sealing parts, and front end is coaxial to be stretched into the guiding groove 5a of piston 5 and cooperate with the mode that can reciprocatingly slide vertically with it; Adopt guide rod 7 structures, be beneficial to the radial position that keeps piston, with the good coaxality of suction tude maintenance, avoid the appearance of bite phenomenon when making it to slide, make piston motion flexible.
In the present embodiment, said guiding groove 5a bottom land is provided with and is communicated in the guiding groove 5a groove and the outer balance channel 5b of groove, and the outer opening of the groove of said balance channel 5b is positioned at the rear end of piston 5; Space and expansion cavity 1 air pressure inside between balance channel 5b ability stable steering groove 5a and the guide rod 7 are eliminated the interference drag of piston 5 motions, and are played damping function, are beneficial to the elimination noise.
In the present embodiment, the bottom land of said guiding groove guiding groove 5a with cushion pad 9 is set; Can adopt silk screen, the collision of ability damper piston 5 and guide rod 7 reduces vibration and also prolongs its working life.
In the present embodiment, the longitudinal cross-section of said piston 5 is pre-large post-small hierarchic structure; The convenient manufacturing and installation reduced piston weight, makes it kinematic dexterity and is improved.
In the present embodiment, the cross section of said expansion cavity 1 is oval;
In the present embodiment, the rear end cover 1b that said baffler suction tude 2 tail ends are fixedly connected expansion cavity 1 forms seal structure; Simple in structure, easy to manufacture, and the installation strength of suction tude is guaranteed.
In the present embodiment, said piston 5 front-end faces are the plane, and are as shown in Figure 2; Certainly also can adopt the cambered surface that seamlessly transits as shown in Figure 3, can both reach goal of the invention; The cambered surface that seamlessly transits also is beneficial to and reduces fluid resistance.
Embodiment two
Fig. 4 is second kind of example structure schematic representation of the present invention; As shown in the figure; Present embodiment and embodiment's one difference only is: setpoint distance and seal through end cap 10 between the rear end cover of said baffler suction tude 2 tail ends and expansion cavity 1, rather than the rear end cover 1b direct sealing through expansion cavity 1; This structure makes full use of expansion cavity 1 volume, eliminates exhaust sound to greatest extent.
Explanation is at last; Above embodiment is only unrestricted in order to technological scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technological scheme of the present invention; And not breaking away from the aim and the scope of technological scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (7)
1. muffler of automatically regulating area of passage; Comprise baffler suction tude, expansion cavity and muffler tail pipe; Said baffler suction tude is communicated in the engine exhaust exhaust port through suction port; Be communicated in expansion cavity through relief opening, muffler tail pipe is communicated in expansion cavity through suction port, and the relief opening of said baffler suction tude is the radial direction through hole that is distributed on the baffler suction tude tube wall; It is characterized in that: said baffler suction tude is provided with circle in the pipeline section of radial direction through hole and is provided with the piston that can reciprocatingly slide along inner tube wall; Said piston nose is met to airintake direction, and the rear end is provided with and can applies the stage clip with the airintake direction reverse pressure to it, and said baffler suction tude tail end seals and be provided with in connecting tube the air inlet equalizing orifice with expansion cavity; Said stage clip tail end withstands baffler suction tude tail end sealing part, and front end withstands piston;
Also comprise guide rod, said piston rear end is provided with the openings lead groove vertically; Be placed in the baffler suction tude in the said guide rod, tail end is fixed in baffler suction tude tail end sealing part, and front end is coaxial to be stretched into the guiding groove of piston and cooperate with the mode that can reciprocatingly slide vertically with it; Said guiding groove bottom land is provided with and is communicated in the guiding groove groove and the outer balance channel of groove, and the outer opening of the groove of said balance channel is positioned at the rear end of piston.
2. the muffler of automatic adjusting area of passage according to claim 1 is characterized in that: the bottom land of said guiding groove with cushion pad is set.
3. the muffler of automatic adjusting area of passage according to claim 2 is characterized in that: the longitudinal cross-section of said piston is pre-large post-small hierarchic structure.
4. the muffler of automatic adjusting area of passage according to claim 3 is characterized in that: the cross section of said expansion cavity is for oval; Muffler tail pipe is a horn mouth through suction port.
5. according to the muffler of the described automatic adjusting area of passage of the arbitrary claim of claim 1 to 4, it is characterized in that: the rear end cover that said baffler suction tude tail end is fixedly connected expansion cavity forms seal structure.
6. according to the muffler of the described automatic adjusting area of passage of the arbitrary claim of claim 1 to 4, it is characterized in that: setpoint distance and seal between the rear end cover of said baffler suction tude tail end and expansion cavity through end cap.
7. according to the muffler of the described automatic adjusting area of passage of the arbitrary claim of claim 1 to 4, it is characterized in that: said piston nose face is cambered surface or the plane that seamlessly transits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101516029A CN101813017B (en) | 2010-04-20 | 2010-04-20 | Exhaust muffler capable of automatically adjusting overflow area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101516029A CN101813017B (en) | 2010-04-20 | 2010-04-20 | Exhaust muffler capable of automatically adjusting overflow area |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101813017A CN101813017A (en) | 2010-08-25 |
| CN101813017B true CN101813017B (en) | 2012-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101516029A Expired - Fee Related CN101813017B (en) | 2010-04-20 | 2010-04-20 | Exhaust muffler capable of automatically adjusting overflow area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101813017B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102828809B (en) * | 2012-09-28 | 2014-09-03 | 长城汽车股份有限公司 | Automotive tailpipe with variable pipe diameter |
| US8827035B2 (en) * | 2012-12-03 | 2014-09-09 | Ford Global Technologies, Llc | Conformal transverse muffler |
| CN103382874A (en) * | 2013-07-11 | 2013-11-06 | 哈尔滨工程大学 | Dual-resonance self-frequency-modulation silencer |
| CN106683657B (en) * | 2016-11-30 | 2020-10-13 | 湖州益环环保工程有限公司 | High-efficient muffler of convertible exhaust position |
| CN109051884A (en) * | 2018-09-27 | 2018-12-21 | 重庆核宏科技有限公司 | A kind of the brick carrying collet and its application method of outstanding back formula loading system |
| CN109630379B (en) * | 2018-12-06 | 2020-04-24 | 珠海凌达压缩机有限公司 | Noise reduction system, noise reduction method and electrical equipment |
| CN110566318B (en) * | 2019-09-30 | 2020-12-22 | 潍柴动力股份有限公司 | Engine tail gas treatment system and treatment method |
| CN110630352A (en) * | 2019-11-21 | 2019-12-31 | 潍柴动力股份有限公司 | Silencer and engine with same |
| CN113799574B (en) * | 2020-06-12 | 2024-06-18 | 长城汽车股份有限公司 | Exhaust valve for vehicle and vehicle |
| CN111729613A (en) * | 2020-07-10 | 2020-10-02 | 蚌埠朝阳玻璃机械有限公司 | Silencing device for glass still kettle |
| CN113847118B (en) * | 2021-09-10 | 2022-10-18 | 浙江吉利控股集团有限公司 | System and method for actively sounding exhaust silencer assembly |
| CN114249428B (en) * | 2021-11-12 | 2023-10-20 | 杭州珩钧环境工程有限公司 | Ecological floating bed for ecological environment protection |
| CN115653710B (en) * | 2022-12-29 | 2023-03-28 | 中国石油大学(华东) | Airflow silencer for engine and working method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1130226A2 (en) * | 2000-03-01 | 2001-09-05 | Honda Giken Kogyo Kabushiki Kaisha | Exhaust muffler |
| KR20020074965A (en) * | 2001-03-23 | 2002-10-04 | 기아자동차주식회사 | Structure of a silencer type of frequency variability |
| JP2004263624A (en) * | 2003-03-03 | 2004-09-24 | Honda Motor Co Ltd | Dummy muffler setting tool |
| CN201354664Y (en) * | 2009-01-16 | 2009-12-02 | 杨广洲 | Variable-frequency muffler |
| CN201666173U (en) * | 2010-04-20 | 2010-12-08 | 重庆大学 | Exhaust muffler capable of adjusting flow area automatically |
-
2010
- 2010-04-20 CN CN2010101516029A patent/CN101813017B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1130226A2 (en) * | 2000-03-01 | 2001-09-05 | Honda Giken Kogyo Kabushiki Kaisha | Exhaust muffler |
| KR20020074965A (en) * | 2001-03-23 | 2002-10-04 | 기아자동차주식회사 | Structure of a silencer type of frequency variability |
| JP2004263624A (en) * | 2003-03-03 | 2004-09-24 | Honda Motor Co Ltd | Dummy muffler setting tool |
| CN201354664Y (en) * | 2009-01-16 | 2009-12-02 | 杨广洲 | Variable-frequency muffler |
| CN201666173U (en) * | 2010-04-20 | 2010-12-08 | 重庆大学 | Exhaust muffler capable of adjusting flow area automatically |
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| Publication number | Publication date |
|---|---|
| CN101813017A (en) | 2010-08-25 |
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Granted publication date: 20120926 Termination date: 20130420 |