CN207332986U - A kind of automobile exhaust muffler - Google Patents

Abstract

The utility model discloses a kind of automobile exhaust muffler, including：Muffler body, air inlet pipe, exhaust pipe, acoustical panel, the front end of the muffler body is provided with preceding closing cap, and the rear end of the muffler body is provided with rear enclosed lid, and a silencing cavity is formed between the preceding closing cap and the rear enclosed lid, spaced first partition and second partition are set in the silencing cavity, anechoic chamber is formed between the first partition and second partition；Described air inlet pipe one end is installed on the preceding closing cap, and the other end is installed in the first partition；Described exhaust pipe one end is installed on the second partition, and the other end is covered installed in the rear enclosed；The acoustical panel is arranged on the middle part of the anechoic chamber, and the anechoic chamber is separated into cup and rear chamber by the acoustical panel.As a result of said structure so that the erasure effect of the utility model is more preferable, so that the level of comfort higher of automobile.

Description

A kind of automobile exhaust muffler

Technical field

It the utility model is related to muffler field, and in particular to a kind of automobile exhaust muffler.

Background technology

The muffler of automobile is the chief component of driving noise.Pole of the countries in the world to the noise of various vehicles Limit value has stringent regulation, and automobile exhaust muffler is exactly such a device of life for reduction exhaust noise.

The effect of automobile exhaust muffler is exactly to eliminate noise by the pulsation for the pressure at expulsion that reduces, decays.According to dry Principle is related to, muffler has two kinds of absorption, reflection basic quieter manners.Absorption silencer, by exhaust gas in glass fibers Friction on the sound-absorbing material such as dimension, steel fibre and asbestos and reduce its energy；Reflective noise reduction device then has the harmony of multiple series connection The porous reflection tube of chamber and different length interconnects, and exhaust gas is wherein by multiple reflection, collision, expansion, cold But its pressure is reduced, mitigates vibration and energy.

Under actual conditions, mostly on automobile is that the different noise reduction principle of comprehensive utilization combines to design muffler, at the same time Multiple muffler units can be also used to carry out multistage noise elimination noise reduction control on the more demanding small passenger car of comfort type.

The effect of automobile exhaust muffler is exactly to reduce the exhaust noise of engine, and enables high-temp waste gas safe and effective Discharge on ground.A part of the muffler as discharge duct, should ensure that its exhaust is unimpeded, resistance is small and sufficient intensity.Muffler will 500 DEG C~700 DEG C high-temperature exhaust airs are subjected to, is ensured in the distance travelled of automotive regulations, is not damaged, do not lose noise elimination effect.

The performance of exhaust system has the comfort level of automobile an important influence, and the muffler in exhaust system is to the row of reduction The noise of gas system plays the role of important, it is necessary to there is a kind of muffler that can effectively reduce car noise, can ensure automobile Comfort level, its erasure effect of automobile exhaust muffler in existing market is simultaneously bad, therefore have impact on the comfort level of automobile.

Utility model content

In view of this, the utility model provides a kind of erasure effect good automobile exhaust muffler.

To achieve the above object, the utility model provides following technical solution：

A kind of automobile exhaust muffler, wherein, including：

Muffler body, the front end of the muffler body are provided with preceding closing cap, the rear end peace of the muffler body Equipped with rear enclosed lid, a silencing cavity is formed between the preceding closing cap and the rear enclosed lid, is equipped with the silencing cavity The first partition and second partition at interval, anechoic chamber is formed between the first partition and second partition；

Air inlet pipe, described air inlet pipe one end are installed on the preceding closing cap, and the other end is installed in the first partition；

Exhaust pipe, described exhaust pipe one end are installed on the second partition, and the other end is covered installed in the rear enclosed；

Acoustical panel, the acoustical panel are arranged on the middle part of the anechoic chamber, and the anechoic chamber is separated into by the acoustical panel Cup and rear chamber, further improve the erasure effect of the muffler, several inlet chambers and some are provided with the acoustical panel A accommodating chamber, the inlet chamber are connected with corresponding accommodating chamber, and elastic component is provided with the inlet chamber, and the elastic component is used In accommodating gear sound part in the gas flowed in the buffering inlet chamber, the accommodating chamber, the gear sound part is used to change described The path of inlet chamber eluting gas.

Further, upper channel, the upper channel are formed between the upper wall of the upper wall of the elastic component and the inlet chamber Front end be connected with the cup, form lower channel between the lower wall of the lower wall of the elastic component and the inlet chamber；It is described Keep off between the lower sloped walls of sound part and the lower wall of the accommodating chamber and form exhaust passage, the rear end of the exhaust passage and the rear chamber It is connected, the front end of the gear sound part offers V-shaped groove, and the upper opening portion of the V-shaped groove is connected with the rear end of the upper channel Logical, the open center of the V-shaped groove is connected with the rear end of the lower channel, the left part of the gear sound part and the accommodating chamber Transition end face between form exhaust clearance, the upper end of the exhaust clearance is connected with the lower opening portion of the V-shaped groove, described The lower end of exhaust clearance is connected with the front end of the exhaust passage.

Further, the upper wall of the inlet chamber and the upper wall of the accommodating chamber are in same level, the air inlet The lower wall end of chamber extends to the lower end of the open center of the V-shaped groove, the upper opening portion of the V-shaped groove and middle part to it is described into The rear end extension of air cavity.

Further, the Z-direction of the accommodating chamber is highly more than the Z-direction height of the inlet chamber, the Y-direction of the accommodating chamber Width is equal to the Y-direction width of the inlet chamber, the X of the accommodating chamber to the X of length and the inlet chamber to length ratio be 1:1 ~1.5.

Further, the inlet chamber is to forming transition end face, the Z-direction of the transition end face during accommodating chamber transition The ratio between height H and Z-direction height B of the left part is 1:0.75~0.85.

Further, the ratio between the Z-direction height H of the transition end face and Z-direction height B of the left part is 1:0.8.

Further, the X of the exhaust clearance to the ratio between Z-direction height B of length and the left part be 1:15~35.

Further, the included angle A between the lower wall of the upper wall of the V-shaped groove and the V-shaped groove is 10 °~30 °.

Further, several raised and several notches are formed by cutting tongue technique on the elastic component, it is described to lack Mouth connects the upper channel with the lower channel.

It can be seen from the above technical scheme that the utility model has the advantages that：

1st, compared with prior art, which employs acoustical panel, so that reducing the dynamics of noise Bigger, adds the level of comfort of automobile.

2nd, compared with prior art, elastic component is provided with the acoustical panel of the automobile exhaust muffler, and is set on elastic component Raised and notch is equipped with, adds the flow channel of gas so that reduces the degree increase of noise.

3rd, compared with prior art, gear soundboard is provided with the acoustical panel of the automobile exhaust muffler, changes gas Flow channel so that the propagation of noise is subject to a degree of stop, and noise reduction is carried out in route of transmission, reduces noise.

In addition to objects, features and advantages described above, the utility model also has other purposes, feature and excellent Point.Below with reference to figure, the utility model is described in further detail.

Brief description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, other attached drawings can also be obtained according to these attached drawings.In the accompanying drawings：

Fig. 1 is the front view of the utility model.

Fig. 2 is the acoustical panel of the utility model and its sectional view of intraware.

Fig. 3 is the left view of the acoustical panel of the utility model.

Fig. 4 is the sectional view of the acoustical panel of the utility model.

Fig. 5 is the protrusion of the elastic component of the utility model and the sectional view of gap portions.

Fig. 6 is the sectional view of the gear sound part of the utility model.

In figure mark for：Muffler body -10, anechoic chamber -11, acoustical panel -12, inlet chamber -121, accommodating chamber -122, mistake Cross end face -1221, elastic component -13, protrusion -131, notch -132, upper channel -14, lower channel -15, gear sound part -16, V-shaped groove - 161st, left part -162, lower sloped walls -163, exhaust clearance -17, exhaust passage -18, preceding closing cap -20, rear enclosed lid -30, One partition plate -40, second partition -50, air inlet pipe -60, air inlet -61, exhaust pipe -70, exhaust outlet -71, filler -80, noise reduction Hole -90.

Embodiment

The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work All other embodiments obtained, shall fall within the protection scope of the present invention.

Referring to figs. 1 to Fig. 6, a kind of automobile exhaust muffler as shown in Figure 1, including, muffler body 10, air inlet pipe 60, exhaust pipe 70 and acoustical panel 12.

In the present embodiment, the muffler body 10 is Elliptic Cylinder.The front end of the muffler body 10 is provided with Preceding closing cap 20, the rear end of the muffler body 10 are provided with rear enclosed lid 30, the preceding closing cap 20 and the rear enclosed A silencing cavity is formed between lid 30, sets spaced first partition 40 and second partition 50 in the silencing cavity, described the Anechoic chamber is formed between one partition plate 40 and second partition 50, micropunch is set in the first partition 40 and second partition 50 (not shown), the micropunch can control the spectral performance of the automobile exhaust muffler, make it in the frequency of needs Obtain good erasure effect.

Described 60 one end of air inlet pipe is installed on the preceding closing cap 20, and the other end is installed in the first partition 40, Filler 80 is filled between the outer wall of the air inlet pipe 60 and the inner wall of the muffler body 10, the air inlet pipe 60 Air inlet 61 is used for the entrance of vehicle exhaust, and described 70 one end of exhaust pipe is installed on the second partition 50, other end installation In the rear on closing cap 30, filled with filling between the outer wall of the exhaust pipe 70 and the inner wall of the muffler body 10 Thing 80, the vent mouth 71 of the exhaust pipe 70 are used for the exclusion of tail gas, the diameter of the exhaust outlet 71 of the exhaust pipe 70 Slightly larger than the diameter of exhaust pipe 70, thus it is possible to vary the speed of gas circulation, there is good erasure effect, the air inlet pipe 60 and row Some bloops 90 are provided with tracheae 70, in the present embodiment, the filler 80 selects sound-absorbing material, and sound-absorbing material is chosen Sponge or glass surface, can play good sound absorption, and sound-absorbing material is also fixed on the inner wall of the passage of air inlet pipe 60, when Into fashionable, a part of acoustic energy rubs and changes into thermal energy consumption and dissipate sound wave in the hole of porous material, makes by muffler Sound wave weakens.

Shown as shown in Figure 1, Figure 3 and Figure 4, the acoustical panel 12 is arranged on the middle part of the anechoic chamber 11, the acoustical panel 12 The anechoic chamber 11 is separated into cup and rear chamber, the tail gas in automobile disappears by 60 noise reduction of air inlet pipe and then described in entering The cup of tone chamber 11, then enters back into acoustical panel 12 and carries out secondary noise reduction, further improve the noise reduction of the automobile exhaust muffler Effect, is provided with several inlet chambers 121 and several accommodating chambers 122 on the acoustical panel 12, the inlet chamber 121 with it is corresponding Accommodating chamber 122 be connected, the upper wall of the upper wall of the inlet chamber 121 and the accommodating chamber 122 is described in same level Inlet chamber 121 is located at the front portion of the acoustical panel 12, and the accommodating chamber 122 is located at the rear portion of the acoustical panel 12.

As shown in Figure 1, Figure 2 and Figure 4, elastic component 13 is provided with the inlet chamber 121, the elastic component 13 is used to buffer The gas of flowing in the inlet chamber 121, when tail gas enters inlet chamber 121, causes elastic component due to increasing air pressure 13 deform upon, so that the flowing velocity of tail gas changes, further reduce the propagation of noise, the elastic component 13 Upper wall and the inlet chamber 121 upper wall between formed upper channel 14, the front end of the upper channel 14 is connected with the cup Logical, tail gas just enters upper channel 14 after being come out from anechoic chamber 11, under the lower wall of the elastic component 13 and the inlet chamber 121 Between wall formed lower channel 15, if as shown in figure 5, on the elastic component 13 by cut tongue technique formed several protrusion 131 and Dry notch 132, the notch 132 connects the upper channel 14 with the lower channel 15, when tail gas enters inlet chamber 121 When, the protrusion 131 on the elastic component 13 can cause a part of gas to flow out to lower channel 15 from the notch 132, so as to flow To the lower part of V-shaped groove 161, exhaust clearance 17 is entered back into, exhaust pipe 70 is flow to from exhaust passage 18, finally discharges, the protrusion 131 setting has further functioned as erasure effect.

Gear sound part 16 is accommodated in the accommodating chamber 122, the gear sound part 16 is used to change the outflow of inlet chamber 121 gas The path of body, and be the propagation that noise is reduced in the route of transmission of noise, when noise encounters the stop of gear sound part 16, just So that noise reduces very much, it is logical to form exhaust between the lower sloped walls 163 of the gear sound part 16 and the lower wall of the accommodating chamber 122 Road 18, the rear end of the exhaust passage 18 are connected with the rear chamber, and tail gas is then finally to enter rear chamber again from exhaust passage 18 Discharged after carrying out noise reduction three times into exhaust pipe 70, the front end of the gear sound part 16 offers V-shaped groove 161, the V-shaped groove 161 It is then the essential structural for changing gas outflow approach.

The upper opening portion of the V-shaped groove 161 is connected with the rear end of the upper channel 14, in the opening of the V-shaped groove 161 Portion is connected with the rear end of the lower channel 15, the left part 162 and the transition end face of the accommodating chamber 122 of the gear sound part 16 Form exhaust clearance 17 between 1221, the X of the exhaust clearance 17 is to the ratio between length and Z-direction height B of the left part 162 1:15~35, further improve erasure effect.

Preferably, the X of the exhaust clearance 17 to the ratio between Z-direction height B of length and the left part 162 be 1:15, make It is more preferable to obtain erasure effect.

Preferably, the X of the exhaust clearance 17 is alternatively 1 to the ratio between Z-direction height B of length and the left part 162: 20、1:25、1:30 so that erasure effect further improves.

Preferably, the X of the exhaust clearance 17 is alternatively 1 to the ratio between Z-direction height B of length and the left part 162: 35, erasure effect is optimal.

The upper end of the exhaust clearance 17 is connected with the lower opening portion of the V-shaped groove 161, under the exhaust clearance 17 End is connected with the front end of the exhaust passage 18, and the lower wall end of the inlet chamber 121 extends to opening for the V-shaped groove 161 Lower end in the middle part of mouthful, the upper opening portion of the V-shaped groove 161 and middle part extend to the rear end of the inlet chamber 121, as shown in fig. 6, Included angle A between the upper wall of the V-shaped groove 161 and the lower wall of the V-shaped groove 161 is 10 °~30 °, changes gas path and stream Speed, further improves erasure effect.

Preferably, the included angle A between the upper wall of the V-shaped groove 161 and the lower wall of the V-shaped groove 161 is 10 °, noise reduction effect Fruit is preferable.

Preferably, the included angle A between the upper wall of the V-shaped groove 161 and the lower wall of the V-shaped groove 161 be alternatively 15 °, 20 °, 25 °, erasure effect further improves.

Preferably, the included angle A between the upper wall of the V-shaped groove 161 and the lower wall of the V-shaped groove 161 is alternatively 30 °, disappears Audio fruit is preferable.

As shown in Fig. 2, the Z-direction of the accommodating chamber 122 is highly more than the Z-direction height of the inlet chamber 121, due to inlet chamber 121 and accommodating chamber 122 height it is inconsistent so that gas from inlet chamber 121 flow out to accommodating chamber 122 when, the stream of gas Speed changes and amplitude of variation is obvious, and then certain eradicating efficacy is played to noise, and the Y-direction of the accommodating chamber 122 is wide Degree equal to the inlet chamber 121 Y-direction width, the X of the accommodating chamber 122 to the X of length and the inlet chamber 121 to length it Than for 1:1~1.5 so that erasure effect is preferable.

Preferably, the X of the accommodating chamber 122 to the X of length and the inlet chamber 121 to length ratio be 1:1, noise reduction effect Fruit is preferable.

Preferably, the X of the accommodating chamber 122 is alternatively to length and the X of the inlet chamber 121 to length ratio, and 1: 1.1、1:1.2、1:1.3、1:1.4, erasure effect is preferable.

Preferably, the X of the X of the accommodating chamber 122 to length and the inlet chamber 121 is alternatively 1 to length ratio:1.5.

The inlet chamber 121 due to inlet chamber 121 and holds to transition end face 1221 is formed during 122 transition of accommodating chamber Receive chamber 122 height it is inconsistent form transition end face 1221, and transition end face 1221 and the lower wall of the inlet chamber 121 mutually hang down Directly so that the Z-direction of gas flow path highly increases, and noise is controlled in the route of transmission of noise, plays The ratio between the effect of noise reduction, the Z-direction height H of the transition end face 1221 and Z-direction height B of the left part 162 is 1:0.75 ~0.85.

Preferably, the ratio between the Z-direction height H of the transition end face 1221 and Z-direction height B of the left part 162 is 1: 0.75。

Preferably, the ratio between the Z-direction height H of the transition end face 1221 and Z-direction height B of the left part 162 is alternatively For 1:0.78、1:0.80、1:0.82、1:0.84.

Preferably, the ratio between the Z-direction height H of the transition end face 1221 and Z-direction height B of the left part 162 is alternatively For 1:0.85.

In said structure, which is substantially carried out noise reduction three times, and noise reduction is in noise three times for this Noise is reduced in route of transmission, be for the first time in air inlet pipe 60, and tail gas just enter the automobile exhaust muffler in, into Filler 80 between tracheae 60 and suppressor wall has carried out noise the absorption of a part and positive effect, secondly, is arranged on Bloop 90 in air inlet pipe so that a part of acoustic energy rubs in the hole of porous material and changes into thermal energy consumption and dissipate, and makes Weakened by the sound wave of muffler, after gas passes through air inlet pipe 60, just into the cup of anechoic chamber 11, before anechoic chamber 11 Room enters acoustical panel 12, that is, is exactly second of noise reduction, and the dynamics of second of noise reduction is also the largest, and gas is before anechoic chamber 11 Room is exited into the inlet chamber 121 of acoustical panel 12, and due to having disposed elastic component 13 in inlet chamber 121, gas enters to Passage 14, due to the air pressure increase in inlet chamber 121, elastic component 13 deforms upon so that the flowing velocity of gas is changed Become, reduce the propagation of noise, meanwhile, protrusion 131 and notch 132 are formd on elastic component 13 by cutting tongue technique so that Into the gas part in upper channel 14 from upper channel 14 directly by the way that another part then flows out to down from notch 132 Passage, at this time, another changes the flowing velocity of gas, plays the effect of noise reduction again, gas is from inlet chamber 121 After noise reduction, just into accommodating chamber 122, due to accommodating gear sound part 16 in accommodating chamber 122, and keep off on sound part 16 and offer V Shape groove 161 so that the gas flowed out from upper channel 14 enters the top of V-shaped groove 161, and the gas flowed out in lower channel 15 enters The lower part of V-shaped groove 161, due to opening up so that the gas flowed out from upper channel 14 is in V-shaped groove and flows for V-shaped groove 161 The change of path, is turned back by the flowing of 161 gas of V-shaped groove and the propagation of noise, and one is due to gear sound The barrier effect of part 16 reduces noise, and two be due to that the flowing velocity of gas changes again, is risen again Erasure effect is arrived, the gas flowed out from V-shaped groove 161 and the gas flowed out from lower channel 15, are pooled to exhaust clearance In 17, since the X of exhaust clearance 17 is to length very little so that the speed in a flash that gas enters back into exhaust clearance 17 drastically becomes Change, noise is reduced again, then gas enters exhaust passage 18 from exhaust clearance 17, due to exhaust passage 18 Z-direction height it is different everywhere, so gas, from during exhaust passage 18 flows out, speed all changes all the time, into Propagation of one step to noise is controlled, and gas enters the rear chamber of anechoic chamber 11 after being flowed out from exhaust passage 18, enter back into Exhaust pipe 70 carries out third time noise reduction, likewise, noise is inhaled in the setting for being also due to filler 80 and bloop 90 Receive, unlike air inlet pipe 60 is unique, the diameter of the exhaust outlet 71 of exhaust pipe 70 is more than the diameter of exhaust pipe 70, in tail gas row Its flowing velocity of the final step gone out changes so that the noise of exhaust system reaches minimum, improves the comfort level of automobile.

It these are only the preferred embodiment of the utility model, be not intended to limit the present invention, for this area Technical staff for, various modifications and changes may be made to the present invention.Where within the spirit and principles of the present invention, Any modification, equivalent replacement, improvement and so on, should be included within the scope of protection of this utility model.

Claims (9)

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

   Muffler body (10), the front end of the muffler body (10) are provided with preceding closing cap (20), the muffler body (10) rear end is provided with rear enclosed lid (30), and forming one between the preceding closing cap (20) and the rear enclosed lid (30) disappears Sound chamber, sets spaced first partition (40) and second partition (50) in the silencing cavity, the first partition (40) and the Anechoic chamber (11) are formed between two partition plates (50)；

   Air inlet pipe (60), described air inlet pipe (60) one end are installed on the preceding closing cap (20), and the other end is installed on described the On one partition plate (40)；

   Exhaust pipe (70), described exhaust pipe (70) one end are installed on the second partition (50), and the other end is installed in the rear On closing cap (30)；

   Acoustical panel (12), the acoustical panel (12) are arranged on the middle part of the anechoic chamber (11), and the acoustical panel (12) is by described in Anechoic chamber (11) is separated into cup and rear chamber, further improves the erasure effect of the muffler, is set on the acoustical panel (12) There are several inlet chambers (121) and several accommodating chambers (122), the inlet chamber (121) is connected with corresponding accommodating chamber (122) It is logical, elastic component (13) is provided with the inlet chamber (121), the elastic component (13) is used to buffer in the inlet chamber (121) The gas of flowing, the accommodating chamber (122) is interior to accommodate gear sound part (16), and the gear sound part (16) is used to change the inlet chamber (121) path of eluting gas.
2. 2. automobile exhaust muffler according to claim 1, it is characterised in that the upper wall of the elastic component (13) with it is described Upper channel (14) is formed between the upper wall of inlet chamber (121), the front end of the upper channel (14) is connected with the cup, described Lower channel (15) is formed between the lower wall of elastic component (13) and the lower wall of the inlet chamber (121)；Under the gear sound part (16) Between skew wall (163) and the lower wall of the accommodating chamber (122) formed exhaust passage (18), the rear end of the exhaust passage (18) with The rear chamber is connected, and the front end of the gear sound part (16) offers V-shaped groove (161), the upper opening portion of the V-shaped groove (161) It is connected with the rear end of the upper channel (14), the rear end phase of the open center and the lower channel (15) of the V-shaped groove (161) Connection, forms between the left part (162) of the gear sound part (16) and the transition end face (1221) of the accommodating chamber (122) and is vented Gap (17), the upper end of the exhaust clearance (17) are connected with the lower opening portion of the V-shaped groove (161), the exhaust clearance (17) lower end is connected with the front end of the exhaust passage (18).
3. 3. automobile exhaust muffler according to claim 2, it is characterised in that the upper wall of the inlet chamber (121) and institute The upper wall of accommodating chamber (122) is stated in same level, the lower wall end of the inlet chamber (121) extends to the V-shaped groove (161) lower end of open center, the upper opening portion of the V-shaped groove (161) and the rear end of middle part to the inlet chamber (121) are prolonged Stretch.
4. 4. automobile exhaust muffler according to claim 3, it is characterised in that the Z-direction of the accommodating chamber (122) is highly big It is wide equal to the Y-direction of the inlet chamber (121) in the Z-direction height of the inlet chamber (121), the Y-direction width of the accommodating chamber (122) Degree, the X of the accommodating chamber (122) to the X of length and the inlet chamber (121) to length ratio be 1:1~1.5.
5. 5. automobile exhaust muffler according to claim 3, it is characterised in that the inlet chamber (121) is to the receiving Transition end face (1221) are formed during chamber (122) transition, Z-direction height H and the left part (162) of the transition end face (1221) The ratio between Z-direction height B be 1:0.75~0.85.
6. 6. automobile exhaust muffler according to claim 5, it is characterised in that the Z-direction of the transition end face (1221) is high It is 1 to spend the ratio between H and Z-direction height B of the left part (162):0.8.
7. 7. automobile exhaust muffler according to claim 5, it is characterised in that the X of the exhaust clearance (17) is to length It is 1 with the ratio between the Z-direction height B of the left part (162):15~35.
8. 8. automobile exhaust muffler according to claim 2, it is characterised in that the upper wall of the V-shaped groove (161) with it is described Included angle A between the lower wall of V-shaped groove (161) is 10 °~30 °.
9. 9. automobile exhaust muffler according to claim 2, it is characterised in that by cutting tongue work on the elastic component (13) Skill forms several raised (131) and several notches (132), the notch (132) by the upper channel (14) and it is described under Passage (15) connects.