CN205477834U

CN205477834U - Automobile exhaust silencer

Info

Publication number: CN205477834U
Application number: CN201620133564.7U
Authority: CN
Inventors: 黄山; 蒲生发
Original assignee: SAIC Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2016-02-22
Filing date: 2016-02-22
Publication date: 2016-08-17
Anticipated expiration: 2026-02-22

Abstract

The utility model discloses an automobile exhaust silencer, including shell body, intake pipe, breather pipe and outlet duct, the inside of shell body has of the setting gradually and the first cavity that communicates, second cavity and third cavity, the intake pipe just is arranged in making going into the second cavity with the engine efflux in inserting the second cavity of shell body, the breather pipe sets up in the shell body, and is used for communicateing first cavity and third cavity, the outlet duct sets up in the shell body, and is used for communicateing the first cavity tail pipe outer with being located the shell body. The utility model discloses an automobile exhaust silencer through equitable structural design, makes tail gas consume more acoustic energy in the transmittance process to reduce the well low -frequency noise in the exhaust, can suppress air current frictional noise again, avoid high frequency noise's production, improved the noise reduction effect.

Description

Automobile exhaust muffler

Technical field

This utility model relates to automobile technical field, and specifically, this utility model relates to a kind of automobile exhaust Acoustic filter.

Background technology

Acoustic filter in engine escape pipe is mainly used in reducing engine exhaust noise, and its principle is logical Cross resistive, resistance and impedance complex noise elimination form reduces the purpose of noise in aerofluxus.Dissipative muffler is A kind of energy absorption acoustic filter, be utilize sound-absorbing porous material to make dissipative muffler, when sound wave passes through When being laid with the pipeline of sound-absorbing material, sound wave will excite in sound-absorbing porous material air molecule in numerous apertures Vibration, due to frictional resistance and the effect of viscous force so that a part of acoustic energy is converted into thermal energy consumption and dissipates, from And reach noise elimination purpose；Reactive muffler then utilizes reflection and the interference effect etc. of sound wave, by changing sound wave Propagation characteristic, hinder acoustic wave energy outwards propagate, reach noise elimination purpose, reactive muffler mainly include expansion Acoustic filter and offset silencer, such as Hull nurse hereby deafener, quarter-wave long tube；Impedance complex is eliminated the noise Generally combine use by resistive and two kinds of structure acoustic filters of resistance, not only simplified design structure but also can reach to disappear Sound purpose.

In the acoustic filter of existing electromotor, much there is muffler desing unreasonable, soundproof effect is paid no attention to Thinking, the problem that tailpipe noise is bigger than normal, a lot of exhaust silencers are by increasing muffler volume and complexity Internal structure design improve sound-damping qualities, reduce the purpose of tail pipe noise.But, increase acoustic filter Volume can increase cost and product weight, and the acoustic filter internal structure of complexity, both can increase cost and weight Amount, the flowing smoothness of exhaust airstream can be affected again so that exhaust back pressure is higher, cause engine power and Moment of torsion produces certain loss, and car load power economy performance declines.It addition, current resistance noise reduction is the most logical Cross placement acoustical cotton, i.e. glass fibre in acoustic filter to reach to eliminate the high frequency noise in aerofluxus, this Plant glass fibre easily to be dispelled by vehicle exhaust, be discharged in air pollution environment therewith, health is made Becoming harm, such structure not only increases cost, again environmental protection not.

Utility model content

This utility model is intended at least to solve one of technical problem present in prior art.To this end, this practicality Novel offer one automobile exhaust muffler, it is therefore an objective to improve noise reduction.

In order to solve above-mentioned technical problem, the technical scheme is that automobile exhaust of this utility model is eliminated the noise Device, including:

Shell body, has the first chamber, the second chamber and the 3rd chamber setting gradually and connecting inside it；

Air inlet pipe, it inserts in the second chamber of shell body, and is used for making to flow into engine exhaust the second chamber In room；

Breather, it is arranged in shell body, and is used for connection the first chamber and the 3rd chamber；And

Escape pipe, it is arranged in shell body, and is used for connection the first chamber and the aerofluxus being positioned at outside shell body Tail pipe.

The sidewall of described air inlet pipe has the through hole allowing engine exhaust flow out.

Being provided with the first dividing plate and second partition in described shell body, the first dividing plate is positioned at described first chamber and institute State between the second chamber, second partition between described second chamber and described 3rd chamber, the first dividing plate The through hole allowing engine exhaust pass through it is respectively provided with second partition.

Described breather passes described first dividing plate and described second partition, and the one end open of breather is positioned at institute Stating in the first chamber, other end opening is positioned in described 3rd chamber.

Described breather is straight tube.

Described escape pipe passes described first dividing plate and described second partition, and the length of described escape pipe is more than institute Stating the length of breather, the one end open of escape pipe is positioned in described first chamber, the other end and described aerofluxus Tail pipe connects.

Automobile exhaust muffler of the present utility model, is designed by Rational structure, makes tail gas in transmittance process Consume more acoustic energy, thus reduce the Middle and low frequency noise in aerofluxus, gas current friction noise can be suppressed again, keep away Exempt from the generation of high-frequency noise, improve noise reduction.

Accompanying drawing explanation

Fig. 1 is the front view of this utility model acoustic filter, and in figure, arrow represents airflow direction；

Fig. 2 is the top view of this utility model acoustic filter；

Labelling in above-mentioned figure is: 1, shell body；2, the first dividing plate；3, second partition；4, air inlet Pipe；5, breather；6, escape pipe；7, tailpipe；A, the first chamber；B, the second chamber；c、 3rd chamber.

Detailed description of the invention

Below against accompanying drawing, by the description to embodiment, detailed description of the invention of the present utility model is made into One step detailed description, it is therefore an objective to help those skilled in the art to design of the present utility model, technical side Case has more complete, accurate and deep understanding, and contributes to its enforcement.

As depicted in figs. 1 and 2, this utility model provides a kind of automobile exhaust muffler, including shell body 1, air inlet pipe 4, breather 5 and escape pipe 6；The inside of shell body 1 has setting gradually and connecting One chamber, the second chamber and the 3rd chamber；Air inlet pipe 4 is inserted in the second chamber of shell body 1, and is used for Make to flow in the second chamber engine exhaust；Breather 5 is arranged in shell body 1, and for connection the One chamber and the 3rd chamber；Escape pipe 6 is arranged in shell body 1, and for connecting the first chamber and being positioned at Tailpipe 7 outside shell body 1.

Specifically, as depicted in figs. 1 and 2, shell body 1 is the cylinder of closed at both ends, inner hollow Housing, air inlet pipe 4 is that the waste gas for being produced by electromotor imports in shell body 1, the air inlet of air inlet pipe 4 Mouth is positioned at outside shell body 1, and the other end opening blanking cover of air inlet pipe 4 blocks.Air inlet pipe 4 along with shell body The direction of the axis perpendicular of 1 is inserted in shell body 1, and the sidewall of the insertion section of air inlet pipe 4 has to allow and starts Machine waste gas flows out to the through hole in the second chamber, and through hole is circumferentially and axially to divide on the sidewall of air inlet pipe 4 The most uniform multiple.

As depicted in figs. 1 and 2, shell body 1 is additionally provided with the first dividing plate 2 and second partition 3, first every Plate 2 between the first chamber and the second chamber, second partition 3 be positioned at the second chamber and the 3rd chamber it Between, the inner chamber body of shell body 1 is divided into three independent chambers by the first dividing plate 2 and second partition 3, the One dividing plate 2 and second partition 3 are also respectively provided with the through hole allowing engine exhaust pass through, make adjacent two chambers it Between connect, make air-flow be exchanged.

As depicted in figs. 1 and 2, breather 5 is the straight tube of both ends open and inner hollow, and breather 5 is horizontal Putting in shell body 1, the axis of breather 5 is paralleled with the axis of shell body 1.Breather 5 is through the One dividing plate 2 and second partition 3 and with the first dividing plate 2 and second partition 3 is fixing is connected, the one of breather 5 End opening is positioned in the first chamber, and other end opening is positioned in the 3rd chamber.

As depicted in figs. 1 and 2, escape pipe 6 passes the first dividing plate 2 and second partition 3, escape pipe 6 Length is more than the length of breather 5, and the one end open of escape pipe 6 is positioned in the first chamber, the other end and row Gas tail pipe 7 connects.

For the acoustic filter of said structure, the main circulation path of exhaust airstream is: air-flow passes through air inlet pipe 4 Entering in the second chamber, the air-flow part entering the second chamber is entered by the through hole on the first dividing plate 2 In the first chamber, another part air-flow is entered in the 3rd chamber by the through hole on second partition 3, enters The air-flow entered in the 3rd chamber is flowed in the first chamber by breather 5 again；Air-flow in first chamber finally leads to Cross escape pipe 6 and flow to tailpipe 7, until discharging acoustic filter.

Acoustic filter of the present utility model, for reactive muffler structure, escape pipe 6 is internal is entirely free of acoustical cotton Material, reaches the purpose eliminated the noise by pipeline and perforation structure.Acoustic filter of the present utility model also has as follows Advantage:

One, reach to eliminate acceleration by acoustic wave filter structures such as pipeline, through hole, the expansion of chamber composition and resonance The purpose of the Middle and low frequency noise in exhaust noise, can make to accelerate tail pipe noise and have the rising song more smoothed out Line；

Two compare, in this acoustic filter with three pipes in common acoustic filter, multi-cavity, band sleeve pipe silencing cotton structure Portion's structure pipeline is few, and perforation is arranged few, and dividing plate is few, decreases the gas current friction high frequency produced in accelerator Noise, it is not necessary to increase silencing cotton design at escape pipe end and absorb high-frequency noise, just can guarantee that high turning Speed noise level, simultaneously to have again low weight, processing simple for simple internal structure design, low cost excellent Point；

Three, internal structure escape pipe and tail pipe design are longer, can play idle noise and well optimize effect Really, meet current idling and close the requirement of lower low noise of turning on the aircondition；

Four, this acoustic filter internal structure back pressure is reasonable, had both reached noise reduction purpose, and had not caused again electromotor merit The heavy losses of rate moment of torsion, it is to avoid the negative effect that car load dynamic property, economy are produced；

Five, the design without silencing cotton, this glass fibre structure of silencing cotton holds during long-term use Easily being dispelled by vehicle exhaust, be discharged in air pollution environment therewith, its main component is silicon dioxide, quilt Human body sucks and accumulates in pulmonary, health can be caused serious harm, not contain silencing cotton and also avoid This unnecessary injury, can reduce again cost simultaneously.

Above in conjunction with accompanying drawing, this utility model is exemplarily described, it is clear that this utility model implements It is not subject to the restrictions described above, as long as have employed method of the present utility model design and technical scheme is carried out The improvement of various unsubstantialities, or the most improved design of the present utility model and technical scheme are directly applied to Other occasion, all within protection domain of the present utility model.

Claims

1. automobile exhaust muffler, it is characterised in that including:

Automobile exhaust muffler the most according to claim 1, it is characterised in that the side of described air inlet pipe Wall has the through hole allowing engine exhaust flow out.

Automobile exhaust muffler the most according to claim 1, it is characterised in that set in described shell body Have the first dividing plate and second partition, the first dividing plate between described first chamber and described second chamber, Two dividing plates are between described second chamber and described 3rd chamber, and the first dividing plate and second partition are respectively provided with and allow The through hole that engine exhaust passes through.

Automobile exhaust muffler the most according to claim 3, it is characterised in that described breather passes Described first dividing plate and described second partition, the one end open of breather is positioned in described first chamber, another End opening is positioned in described 3rd chamber.

5. according to the arbitrary described automobile exhaust muffler of Claims 1-4, it is characterised in that described logical Trachea is straight tube.

Automobile exhaust muffler the most according to claim 5, it is characterised in that described escape pipe passes Described first dividing plate and described second partition, the length of described escape pipe, more than the length of described breather, goes out The one end open of trachea is positioned in described first chamber, and the other end is connected with described tailpipe.