CN108590811A

CN108590811A - Motor vehicle exhaust muffler

Info

Publication number: CN108590811A
Application number: CN201810327384.6A
Authority: CN
Inventors: 闫洁
Original assignee: LIUZHOU LIHE EXHAUST CONTROL SYSTEM CO Ltd
Current assignee: LIUZHOU LIHE EXHAUST CONTROL SYSTEM CO Ltd
Priority date: 2018-04-12
Filing date: 2018-04-12
Publication date: 2018-09-28

Abstract

The invention discloses a kind of motor vehicle exhaust mufflers, it is divided into the shell of the first, second, and third chamber every disk every disk and described second by first respectively including inner space, first, second is sequentially passed through outside one end of shell stretches into the indoor air inlet pipe of third chamber every disk, the second and first exhaust pipe stretched into every disk in first chamber is sequentially passed through outside the other end of shell, air inlet pipe is equipped with arc pipeline section in inlet port, and air inlet pipe is in being equipped with one section of air through hole pipeline section in the first, second chamber；Exhaust pipe is arranged with beans pipe respectively at being equipped with one section long exhaust hole pipeline section in first, third chamber on two long exhaust hole pipeline section, and acoustical cotton is filled between beans Guan Yuchang exhaust hole pipeline sections；Exhaust pipe in second chamber be equipped with one section short exhaust hole pipeline section.Compared with the prior art, the present invention can solve the problems, such as that existing silencer cannot effectively reduce slow-speed of revolution low frequency order noise and poor to high-frequency noise noise elimination stability.

Description

Motor vehicle exhaust muffler

Technical field

The present invention relates to automobile exhaust muffler manufacturing technology fields, especially a kind of exhausting silencer for motor vehicle Device.

Background technology

Have a kind of exhaust silencer of motor vehicle, which has shell, the space in the shell respectively by Equipped with three chambers are divided into every disk before and after multiple small through hole, an air inlet pipe enters across the first and second chamber in third chamber, A piece escape pipe passes through forward and backward two pieces to stretch out third chamber every disk from first chamber, at forward and backward two pieces every being coated with centre on disk Pipe, in second chamber be equipped with silencing cotton.There are the following problems in use for this exhaust silencer：1, close to exhaust outlet Silencer because of the limitation of chassis space and appearance requirement etc., shape of shell is flat irregular duckbilled after preceding drum usually at this Shape, the silencing cotton in second chamber during long-time use because gravity influences usually to be biased to cavity on one side, cannot be uniform It intersperses among in chamber, to reduce Muffler Performance；2, when the off-gas flows being discharged from engine pass through the chamber containing silencing cotton When room, the moisture in special operation condition silencing cotton can absorb a small amount of off-gas flows during long-time use, absorbs disappearing for moisture Sound cotton can gradually corrode every disk, be had an impact to the durability of silencer product；3, because place's shell shape close to exhaust outlet is logical Flat after Chang Weiqian drums, relatively preceding two chamber of third chamber sectional area as the first chamber of air inlet is minimum, and divergence ratio is also three It is minimum in chamber, and the divergence ratio of the first chamber of air inlet often plays an important role to reducing low frequency order noise, thus the structure Low-frequency noise cannot be reduced very well, while also resulting in the heel row slow-speed of revolution in noise subjective assessment to have clamp lug film sense, Chang Hui often Cause the complaint of client.

Invention content

Technical problem to be solved by the invention is to provide a kind of motor vehicle exhaust mufflers, to solve existing silencer Slow-speed of revolution low frequency order noise and the problem to high-frequency noise noise elimination stability difference cannot effectively be reduced.

The technical proposal for solving the technical problem of the invention is：This motor vehicle exhaust muffler, including it is internal empty Between be divided into the shell of first chamber, second chamber and third chamber every disk every disk and described second by first respectively, from described Described first is sequentially passed through outside one end of shell and stretches into the indoor air inlet pipe of third chamber every disk every disk and described second, from institute It states and sequentially passes through described second outside the other end of shell and stretch into the exhaust pipe in the first chamber every disk every disk and described first, The air inlet pipe is equipped with arc pipeline section in inlet port, and the air inlet pipe is all provided in the first chamber and the second chamber There is one section of air through hole pipeline section；The exhaust pipe in the first chamber and the third chamber respectively at being equipped with one section of long row Vent hole pipeline section is arranged with beans pipe, in the beans pipe and the long exhaust hole on two long exhaust hole pipeline sections Acoustical cotton is filled between pipeline section；The exhaust pipe in the second chamber be equipped with one section short exhaust hole pipeline section.

In above-mentioned motor vehicle exhaust muffler technical solution, more specific technical solution can also be：The air inlet pipe tool The straight pipe for having the curved pipe section and linking with the arc pipeline section.

Further：Air through hole pipeline section position in the first chamber and the second chamber is located at nearly institute First is stated every the both sides of the straight pipe of disk.

Further：Described first every disk and described second every being equipped with multiple apertures on disk.

Further：The length of the long exhaust hole pipeline section is more than the length of the air through hole pipeline section, the air inlet The length of through-hole pipeline section is more than the length of the short exhaust hole pipeline section.

Further：The shell is welded by upper shell and lower housing.

By adopting the above-described technical solution, the present invention has the advantages that compared with prior art：1, due into Tracheae is equipped with one section of air through hole pipeline section in first chamber, and the exhaust ventilation part into shell passes through the first chamber of air inlet pipe Air through hole pipeline section enter first chamber, since the divergence ratio of first chamber is typically maximum, energy in three chambers It is more effective to reduce low frequency order noise；A part of exhaust gas enters first chamber by the air through hole pipeline section of the first chamber simultaneously, and one Part enters second chamber by the air through hole pipeline section of air inlet pipe second chamber, and remaining exhaust ventilation enters the by air inlet pipe Three chambers have disperseed exhaust gas and have entered shell distributional environment, good to high-frequency noise noise elimination stability, can also improve noise subjective assessment The clamp lug film problem that middle car heel row client usually applies for checking and examination；2, this motor vehicle exhaust muffler is by being filled in escape pipe and housing Silencing cotton between pipe eliminates high-frequency noise, reduces airflow noise；It eliminates the silencing cotton under special operation condition and absorbs aqueous vapor, for a long time It using the hidden danger that can corrode every disk, while also avoiding due to gravity, for a long time using leading to noise reduction in anisotropic cylinder chamber room The problem of cotton cannot be uniformly distributed, to extend the service life and performance of silencer.

Description of the drawings

Fig. 1 is the structural schematic diagram of the embodiment of the present invention.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the scheme of installation of air inlet and exhaust piper.

Fig. 4 be the embodiment of the present invention first every disk structural schematic diagram.

Fig. 5 be the embodiment of the present invention second every disk structural schematic diagram.

Specific implementation mode

Below in conjunction with attached drawing, the invention will be further described：

Motor vehicle exhaust muffler as shown in Figure 1, Figure 2 and Figure 3 include inner space respectively by first every disk 6 and second every disk 8 are divided into the shell 1 of first chamber I, second chamber II and third chamber III, and the shell 1 is by upper shell 1-1 and lower housing 1-2 is welded, and the bottom of lower half shell 1-2 is arc-shaped, and the lowest point of the arc is located at the lower half shell 1-2 of first chamber I On；First every disk 6 and second every being equipped with multiple apertures on disk 8, first every disk 6 and second every disk 8 in respectively with lower half shell The junction of 1-2 is provided with drain chamber, as shown in Figure 4 and Figure 5；It is coated with air inlet pipe 2 and exhaust pipe 3 respectively in shell 2, into Tracheae 2 sequentially passes through first outside one end of shell 1 and is stretched into third chamber III every disk 7 every disk 6 and second；Air inlet pipe 2 in into Gas port end is equipped with arc pipeline section 2-1, and inlet port is the intersection of air inlet pipe 2 and shell 1, and air inlet pipe 2 has arc pipeline section 2-1 and the straight pipe 2-2 linked with arc pipeline section 2-1, arc pipeline section 2-1 can lengthen promotion and eliminate the noise；In first chamber I With one section of air through hole pipeline section, the air inlet in first chamber I and second chamber II are equipped in the air inlet pipe 2 in second chamber II Through-hole pipe section is located at close to first every the both sides of the straight pipe 2-2 of disk 6；Exhaust pipe 3 from the other end of shell 1 also It is to sequentially pass through second outside outlet side to stretch into first chamber I every disk 6 every disk 7 and first；Respectively at first chamber I and third chamber Exhaust pipe 3 in the II of room is equipped with one section long exhaust hole pipeline section, and beans pipe is arranged on the two long exhaust hole pipeline sections 5, acoustical cotton 4 is filled between beans pipe 5 and long exhaust hole pipeline section；It is equipped with one in the exhaust pipe 3 in second chamber II The short exhaust hole pipeline section of section, the length of long exhaust hole pipeline section are more than the length of air through hole pipeline section, the length of air through hole pipeline section Length of the degree more than short exhaust hole pipeline section.

When work, since air inlet pipe is equipped with one section of air through hole pipeline section in first chamber, into the exhaust ventilation of shell A part enters first chamber by the air through hole pipeline section of the first chamber of air inlet pipe, since the divergence ratio of first chamber is typically three It is maximum in a chamber, therefore can more effectively reduce low frequency order noise；A part of exhaust gas is logical by the air inlet of the first chamber simultaneously Hole pipeline section enters first chamber, and a part enters second chamber, residue row by the air through hole pipeline section of air inlet pipe second chamber Gas exhaust gas enters third chamber by air inlet pipe, has disperseed exhaust gas and has entered shell distributional environment, can also improve noise subjective assessment The clamp lug film problem that middle car heel row client usually applies for checking and examination.

Claims

1. a kind of motor vehicle exhaust muffler, including inner space are divided into first every disk and described second by first every disk respectively The shell of chamber, second chamber and third chamber sequentially passes through described first every disk and described outside one end of the shell Two stretch into the indoor air inlet pipe of third chamber every disk, and described second is sequentially passed through outside the other end of the shell every disk and institute It states first and stretches into the exhaust pipe in the first chamber every disk, it is characterised in that：The air inlet pipe is equipped with arc in inlet port Pipeline section, the air inlet pipe is in being equipped with one section of air through hole pipeline section in the first chamber and the second chamber；The exhaust Pipe is respectively at being equipped with one section long exhaust hole pipeline section in the first chamber and the third chamber, in two long exhausts It is arranged with beans pipe on through-hole pipeline section, acoustical cotton is filled between the beans pipe and the long exhaust hole pipeline section；It is described Exhaust pipe in the second chamber be equipped with one section short exhaust hole pipeline section.

2. motor vehicle exhaust muffler according to claim 1, it is characterised in that：The air inlet pipe has the curved pipe Section and the straight pipe linked with the arc pipeline section.

3. motor vehicle exhaust muffler according to claim 2, it is characterised in that：The first chamber and second chamber Indoor air through hole pipeline section position is located at the both sides of nearly described first straight pipe every disk.

4. motor vehicle exhaust muffler according to claim 1 or 2 or 3, it is characterised in that：Described first every disk and institute Second is stated every being equipped with multiple apertures on disk.

5. motor vehicle exhaust muffler according to claim 4, it is characterised in that：The length of the long exhaust hole pipeline section More than the length of the air through hole pipeline section, the length of the air through hole pipeline section is more than the length of the short exhaust hole pipeline section Degree.

6. motor vehicle exhaust muffler according to claim 5, it is characterised in that：The shell is by upper shell and lower housing It is welded.