CN216240894U

CN216240894U - Automobile exhaust pipe core component and automobile exhaust pipe

Info

Publication number: CN216240894U
Application number: CN202122233275.8U
Authority: CN
Inventors: 徐军; 谭明明; 李新红; 杨军军; 谭明宇; 覃大立
Original assignee: Wuhan Jinfu Auto Parts Co ltd
Current assignee: Wuhan Jinfu Auto Parts Co ltd
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2022-04-08
Anticipated expiration: 2031-09-15

Abstract

The utility model discloses an automobile exhaust pipe core component which comprises a front partition plate, a rear partition plate, an air inlet buffer pipe and an exhaust buffer pipe, wherein the front partition plate and the rear partition plate are arranged side by side and keep a distance; the front end port of the installation pipe is in threaded connection with a front end cover, an exhaust filter element is arranged in the installation pipe, and the exhaust filter element is positioned between the two air guide branch pipes; according to the utility model, the installation pipe is arranged beside the air inlet buffer pipe, the exhaust filter element is arranged in the installation pipe, the tail gas is guided into the installation pipe through the air guide branch pipe, and the exhaust filter element is used for filtering the tail gas, so that the situation that the first through hole, the second through hole and other smaller holes in the air inlet buffer pipe are blocked by particles in the tail gas can be avoided, the particles in the tail gas can be prevented from being exhausted into the air, the pollution can be reduced, and the environment can be protected.

Description

Automobile exhaust pipe core component and automobile exhaust pipe

Technical Field

The utility model belongs to the technical field of automobile parts, and particularly relates to an automobile exhaust pipe core assembly and an automobile exhaust pipe.

Background

The main function of the automobile exhaust pipe is to exhaust the exhaust gas in the automobile. The automobile exhaust muffler has the functions of damping and reducing noise and prolonging the service life of an exhaust muffler system for the automobile body. The main material of the exhaust pipe is stainless steel. For a general automobile, because the pressure of the exhaust gas of the automobile is high when the exhaust gas leaves the engine, the noise generated by the exhaust gas is high, the exhaust gas plays a main role in silencing at the moment, namely an exhaust pipe of the automobile is provided with a silencer, and the noise of the automobile is greatly reduced. And its main theory of operation makes the air current reposition of redundant personnel through the multichannel, and these reposition of redundant personnel rub the striking mutually and make the velocity of flow of air current reduce gradually, so recirculatory, finally make waste gas discharge through the blast pipe of car and flow for the noise reduces. Thereby achieving the effect of reducing the noise of the daily automobile. Although the existing automobile exhaust pipe is greatly improved in technology, the silencing and filtering effects of the existing automobile exhaust pipe still need to be further enhanced, and the structure of the exhaust pipe also needs to be further improved.

The Chinese patent application with the application number of 201510162360.6 discloses a tail exhaust pipe which is special for automobiles and can be rapidly cooled, and the tail exhaust pipe comprises an exhaust steel pipe main body, wherein the exhaust steel pipe main body comprises three sections of steel pipes, namely an air inlet steel pipe, a buffer pipe and an air outlet steel pipe, the air inlet steel pipe, the buffer pipe and the air outlet steel pipe are fixedly connected in sequence, the air inlet steel pipe and the buffer pipe are communicated with each other, and the buffer pipe and the air outlet steel pipe are communicated with each other. The exhaust steel pipe body comprises three sections of steel pipes, namely an air inlet steel pipe, a buffer pipe and an air outlet steel pipe, the air inlet steel pipe, the buffer pipe and the air outlet steel pipe are fixedly connected in sequence, the air inlet steel pipe and the buffer pipe are communicated with each other, the buffer pipe and the air outlet steel pipe are communicated with each other, the communicated buffer pipe is added in the tail exhaust pipe, exhaust is quicker, effective cooling is realized, cold and hot gas inside and outside can be obviously exchanged, and meanwhile, when the automobile exhaust pipe is used, high-temperature and high-pressure gas passing through the pipe can be quickly cooled.

The Chinese invention patent application with the application number of 201510935976.2 provides an engine silencer, which comprises a shell, a core component arranged in the shell, and a front end cover and a rear end cover which are arranged at two ends of the shell, wherein the core component comprises a front partition plate, a rear partition plate, an air inlet pipe and an exhaust pipe, the front partition plate and the rear partition plate are arranged in the shell to divide the shell into three chambers, and a plurality of through holes are densely distributed on the front partition plate and the rear partition plate to enable the three chambers to be communicated with each other; the front end cover is provided with an air inlet, one end of the air inlet pipe is arranged in the air inlet, and the other end of the air inlet pipe penetrates through the front partition plate and the rear partition plate and then extends into the cavity close to the rear end cover; the rear end cover is provided with an exhaust hole, one end of the exhaust pipe is arranged in the exhaust hole, and the other end of the exhaust pipe penetrates through the rear partition plate and the front partition plate and then extends into the cavity close to the front end cover. The muffler is compact and can be arranged in a limited space of the chassis, and meanwhile, the exhaust gas of the engine passes through the muffler, and the noise can be reduced to a target curve.

The Chinese utility model patent with application number CN201620418551.4 discloses an automobile exhaust pipe core component and an automobile exhaust pipe, which comprises a front partition plate, a rear partition plate, an air inlet buffer tube, an exhaust buffer tube, a middle buffer tube and an air inlet buffer tube plug, wherein the rear end of the air inlet buffer tube passes through the front partition plate and the rear partition plate in sequence and is connected with the air inlet buffer tube plug in a sealing way; the rear end of the exhaust buffer tube is an air outlet, and the front end of the exhaust buffer tube sequentially passes through the rear partition plate and the front partition plate; middle buffer tube passes the middle part of preceding baffle and back baffle, and the middle part of the buffer tube that admits air is equipped with a plurality of through-holes one, and the rear portion of the buffer tube that admits air is equipped with a plurality of through-holes two, and middle buffer tube middle part is equipped with a plurality of through-holes three, all is equipped with a plurality of through-holes four on preceding baffle and the back baffle. The exhaust pipe is simple in structure, convenient to install and practical, and can better play a role in filtering and silencing.

Although the exhaust pipe can play a good silencing effect, the through hole formed in the air inlet buffer pipe is easily blocked by particles in tail gas after being used for a long time, and exhaust of the exhaust pipe is influenced.

Disclosure of Invention

The utility model aims to provide an automobile exhaust pipe core component and an automobile exhaust pipe, and solves the problem that a through hole formed in an air inlet buffer pipe of the existing exhaust pipe is easily blocked by particles in tail gas after being used for a long time, so that exhaust of the exhaust pipe is influenced.

In order to achieve the purpose, the utility model adopts the technical scheme that:

an automobile exhaust pipe core component comprises a front partition plate, a rear partition plate, an air inlet buffer tube and an exhaust buffer tube, wherein the front partition plate and the rear partition plate are arranged side by side and keep a distance, the automobile exhaust pipe core component also comprises a mounting tube, the mounting tube is arranged in parallel with the air inlet buffer tube, the front end and the rear end of the mounting tube are communicated with the air inlet buffer tube through air guide branch tubes, one ends of the air guide branch tubes are in sealing connection with the side walls of the mounting tube, and the other ends of the air guide branch tubes are in sealing connection with the side walls of the air inlet buffer tube; the front end port of the installation pipe is in threaded connection with a front end cover, the rear end port of the installation pipe is in threaded connection with a rear end cover, an exhaust filter element is arranged in the installation pipe and located between the two air guide branch pipes, a first compression spring and a second compression spring are arranged in the installation pipe, one end of the first compression spring is abutted to the front end cover, the other end of the first compression spring is abutted to the exhaust filter element, one end of the second compression spring is abutted to the rear end cover, and the other end of the second compression spring is abutted to the exhaust filter element; a pressure safety valve is arranged in the air inlet buffer pipe and is positioned between the two air guide branch pipes; the two air guide branch pipes are located on one side, far away from the rear clapboard, of the front clapboard.

The exhaust silencer is used for exhausting and silencing, the exhaust filter element is mounted through the mounting pipe, the exhaust filter element is used for filtering tail gas, the exhaust silencer is prevented from being blocked by particles in the tail gas after long-time use, two ends of the mounting pipe are communicated with the intake buffer pipe through the air guide branch pipe, and the space in the intake buffer pipe is cut off through the pressure safety valve; when the pressure safety valve is closed, tail gas enters the air inlet buffer tube from one end of the air inlet buffer tube, enters the mounting tube only through the air guide branch tube and is filtered by the exhaust filter element, and the tail gas can enter the air inlet buffer tube again through the other air guide branch tube after being filtered; when the pressure in the air inlet buffer pipe is overlarge, the tail gas can burst the pressure safety valve, and directly enters the other end from one end of the air inlet buffer pipe without passing through the exhaust filter element, so that the exhaust gas protection device is protected, and the damage to the exhaust gas protection device caused by overlarge pressure is avoided; the front end cover is used for sealing the front end port of the installation pipe, the rear end cover is used for sealing the rear end port of the installation pipe, the front end cover or the rear end cover is opened, the exhaust filter element can be replaced, the compression spring I and the compression spring II are arranged in the installation pipe, the exhaust filter element is arranged between the two air guide branch pipes, the exhaust filter element can be popped out by the compression spring II or the compression spring I when the front end cover or the rear end cover is opened, and the exhaust filter element is conveniently taken out from the installation pipe.

The front end of the air inlet buffer tube is an air inlet, and the rear end of the air inlet buffer tube penetrates through the front partition plate and the rear partition plate in sequence and is connected with the air inlet buffer tube plug in a sealing manner; the rear end of the exhaust buffer tube is an air outlet, and the front end of the exhaust buffer tube sequentially passes through the rear partition plate and the front partition plate; the middle buffer tube passes through the middle parts of the front clapboard and the rear clapboard, and the front end and the rear end of the middle buffer tube respectively extend out of the front part of the front clapboard and the rear part of the rear clapboard; the middle part of the air inlet buffer tube is provided with a plurality of first through holes, the rear part of the air inlet buffer tube is provided with a plurality of second through holes, the middle part of the middle buffer tube is provided with a plurality of third through holes, and the front partition plate and the rear partition plate are respectively provided with a plurality of fourth through holes.

Further, the length of the front end of the exhaust buffer tube extending out of the front partition plate is less than the length of the front end of the intake buffer tube extending out of the front partition plate; the length of the front end of the middle buffer tube extending out of the front partition plate is less than the length of the front end of the exhaust buffer tube extending out of the front partition plate; the length of the rear end of the air inlet buffer tube extending out of the rear partition plate is less than the length of the rear end of the air outlet buffer tube extending out of the rear partition plate; the length of the rear end of the middle buffer tube extending out of the rear partition plate is less than the length of the rear end of the air inlet buffer tube extending out of the rear partition plate.

Furthermore, the first through hole and the third through hole are positioned between the front partition plate and the rear partition plate; the through hole is positioned behind the rear clapboard.

Furthermore, the front partition plate and the rear partition plate are the same in shape and structure, and are vertically arranged; the front partition plate and the rear partition plate are in sealing connection with the air inlet buffer tube, the middle buffer tube and the air exhaust buffer tube.

Further, the air inlet buffer tube, the middle buffer tube and the air exhaust buffer tube are sequentially arranged from top to bottom.

The utility model provides an automobile exhaust pipe, includes the casing, sets up respectively the preceding lid and the back lid of casing front end and rear end have seted up the inlet port on the preceding lid, have seted up the exhaust hole on the back lid, still include foretell automobile exhaust pipe core subassembly, preceding baffle, back baffle, the buffer tube end cap that admits air, the buffer tube that admits air, middle buffer tube and exhaust buffer tube setting are in the casing, and the front end setting of the buffer tube that admits air is in the inlet port, and the rear end setting of exhaust buffer tube is in the exhaust hole, the installation pipe sets up outside the casing, two air guide branch all runs through the casing, and with casing sealing connection.

Further, preceding baffle and back baffle all with casing sealing connection, preceding baffle and back baffle separate into three cavities with the casing: a front cavity is arranged between the front cover body and the front partition plate, a middle cavity is arranged between the front partition plate and the rear partition plate, and a rear cavity is arranged between the rear cover body and the rear partition plate; the three chambers are communicated with each other through the through holes on the front partition plate and the through holes on the rear partition plate; the through hole II is positioned in the rear cavity, the through hole I and the through hole III are both positioned in the middle cavity, and the front end of the middle buffer tube and the front end of the exhaust buffer tube are both positioned in the front cavity; the rear end of the middle buffer tube and the rear end of the air inlet buffer tube are both positioned in the rear chamber; the joints of the two air guide branch pipes and the air inlet buffer pipe are both positioned in the front cavity.

Compared with the prior art, the utility model has the beneficial effects that:

(1) according to the utility model, the installation pipe is arranged beside the air inlet buffer pipe, the exhaust filter element is arranged in the installation pipe, the tail gas is guided into the installation pipe through the air guide branch pipe, and the exhaust filter element is used for filtering the tail gas, so that the situation that the first through hole and the second through hole which are formed in the air inlet buffer pipe and other smaller holes are blocked by particles in the tail gas can be avoided, the particles in the tail gas can be prevented from being exhausted into the air, the pollution can be reduced, and the environment can be protected; the exhaust filter core is installed in the installation pipe, through front end housing and the rear end cap that sets up at installation pipe both ends, conveniently changes the exhaust filter core.

(2) The exhaust pipe of the automobile is simple in structure, convenient to install and practical, on the basis of the prior art, the silencing effect of the automobile exhaust pipe is further improved, and the middle buffer pipe is added, and the air inlet buffer pipe and the partition plate are provided with the through holes, so that waste gas forms a plurality of airflow channels in the shell to generate a steady flow effect, and the filtering and silencing effects are better played.

Drawings

FIG. 1 is a front view of an exhaust pipe core assembly for an automobile according to the present invention;

FIG. 2 is a schematic left side view of an exhaust tube core assembly of an automobile of the present invention;

in the figure: 1. a front bulkhead; 2. a rear bulkhead; 3. an exhaust buffer tube; 4. a middle buffer tube; 5. an air intake buffer tube; 6. an air inlet buffer pipe plug; 7. a first through hole; 8. a second through hole; 9. a third through hole; 10. a fourth through hole; 11. installing a pipe; 12. an air guide branch pipe; 13. a front end cover; 14. a rear end cap; 15. an exhaust filter element; 16. a first compression spring; 17. a second compression spring; 18. a pressure relief valve.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and fig. 2, the present embodiment provides an automobile exhaust pipe core assembly, which includes a front partition plate 1, a rear partition plate 2, an air intake buffer tube 5 and an exhaust buffer tube 3, where the front partition plate 1 and the rear partition plate 2 are arranged side by side and keep a distance, and further includes a mounting tube 11, the mounting tube 11 is arranged in parallel with the air intake buffer tube 5, both front and rear ends of the mounting tube 11 are communicated with the air intake buffer tube 5 through an air guide branch tube 12, one end of the air guide branch tube 12 is connected with a side wall of the mounting tube 11 in a sealing manner, and the other end is connected with a side wall of the air intake buffer tube 5 in a sealing manner; a front end cover 13 is screwed at the front end port of the installation pipe 11, a rear end cover 14 is screwed at the rear end port of the installation pipe 11, an exhaust filter element 15 is arranged in the installation pipe 11, the exhaust filter element 15 is positioned between the two air guide branch pipes 12, a first compression spring 16 and a second compression spring 17 are arranged in the installation pipe 11, one end of the first compression spring 16 is abutted with the front end cover 13, the other end of the first compression spring is abutted with the exhaust filter element 15, one end of the second compression spring 17 is abutted with the rear end cover 14, and the other end of the second compression spring is abutted with the exhaust filter element 15; a pressure safety valve 18 (not shown in FIG. 2) is arranged in the air inlet buffer pipe 5, and the pressure safety valve 18 is positioned between the two air guide branch pipes 12; the two air guide branch pipes 12 are both positioned on one side of the front clapboard 1 far away from the rear clapboard 2.

The exhaust silencer is characterized in that a front partition plate 1, a rear partition plate 2, an air inlet buffer tube 5 and an exhaust buffer tube 3 are arranged for exhaust and noise reduction, an exhaust filter element 15 is arranged through an installation tube 11, the exhaust filter element 15 is arranged for filtering tail gas, the blockage caused by particles in the tail gas after long-time use is avoided, two ends of the installation tube 11 are communicated with the air inlet buffer tube 5 through an air guide branch tube 12, and a pressure safety valve 18 is arranged for cutting off the space in the air inlet buffer tube 5; when the pressure safety valve 18 is closed, after entering the air inlet buffer tube 5 from one end of the air inlet buffer tube 5, the tail gas can only enter the installation tube 11 through the air guide branch tube 12 and is filtered by the exhaust filter element 15, and after being filtered, the tail gas can enter the air inlet buffer tube 5 again through the other air guide branch tube 12; when the pressure in the air inlet buffer tube 5 is overlarge, the tail gas can burst the pressure safety valve 18, and directly enters the other end from one end of the air inlet buffer tube 5 without passing through the exhaust filter element 15, so that the utility model is protected, and the utility model is prevented from being damaged by overlarge pressure; the front end cover 13 is used for sealing the front end port of the installation pipe 11, the rear end cover 14 is used for sealing the rear end port of the installation pipe 11, the front end cover 13 or the rear end cover 14 is opened, the exhaust filter element 15 can be replaced, the first compression spring 16 and the second compression spring 17 are arranged in the installation pipe 11 and used for arranging the exhaust filter element 15 between the two air guide branch pipes 12, and when the front end cover 13 or the rear end cover 14 is opened, the exhaust filter element 15 can be popped up by the second compression spring 17 or the first compression spring 16, and the exhaust filter element 15 can be conveniently taken out of the installation pipe 11.

The air inlet buffer tube is arranged at the front end of the air inlet buffer tube 5, and the rear end of the air inlet buffer tube 5 penetrates through the front partition plate 1 and the rear partition plate 2 in sequence and then is connected with the air inlet buffer tube plug 6 in a sealing mode; the rear end of the exhaust buffer tube 3 is an air outlet, and the front end of the exhaust buffer tube 3 sequentially passes through the rear partition plate 2 and the front partition plate 1; the middle buffer tube 4 passes through the middle parts of the front clapboard 1 and the rear clapboard 2, and the front end and the rear end of the middle buffer tube 4 respectively extend out of the front part of the front clapboard 1 and the rear part of the rear clapboard 2; the middle part of the air inlet buffer tube 5 is provided with a plurality of first through holes 7, the rear part of the air inlet buffer tube 5 is provided with a plurality of second through holes 8, the middle part of the middle buffer tube 4 is provided with a plurality of third through holes 9, and the front partition plate 1 and the rear partition plate 2 are respectively provided with a plurality of fourth through holes 10.

Further, the length of the front end of the exhaust buffer tube 3 extending out of the front partition plate 1 is less than the length of the front end of the intake buffer tube 5 extending out of the front partition plate 1; the length of the front end of the middle buffer tube 4 extending out of the front clapboard 1 is less than the length of the front end of the exhaust buffer tube 3 extending out of the front clapboard 1; the length of the rear end of the air inlet buffer tube 5 extending out of the rear partition plate 2 is less than the length of the rear end of the air exhaust buffer tube 3 extending out of the rear partition plate 2; the length of the rear end of the middle buffer tube 4 extending out of the rear partition plate 2 is less than the length of the rear end of the air intake buffer tube 5 extending out of the rear partition plate 2.

Further, the first through hole 7 and the third through hole 9 are positioned between the front partition plate 1 and the rear partition plate 2; the second through hole 8 is positioned behind the rear partition plate 2.

Further, the front partition board 1 and the rear partition board 2 have the same shape and structure, and the front partition board 1 and the rear partition board 2 are both vertically arranged; the front partition plate 1 and the rear partition plate 2 are hermetically connected with an air inlet buffer tube 5, a middle buffer tube 4 and an air exhaust buffer tube 3.

Further, the air intake buffer tube 5, the intermediate buffer tube 4 and the air exhaust buffer tube 3 are arranged in this order from top to bottom.

The utility model provides an automobile exhaust pipe, includes the casing, sets up respectively the preceding lid and the back lid of casing front end and rear end have seted up the inlet port on the preceding lid, have seted up the exhaust hole on the back lid, still include foretell automobile exhaust pipe core assembly, preceding baffle 1, back baffle 2, the buffer tube end cap 6 that admits air, the buffer tube 5 that admits air, middle buffer tube 4 and exhaust buffer tube 3 set up in the casing, and the front end of the buffer tube 5 that admits air sets up in the inlet port, and the rear end of exhaust buffer tube 3 sets up in the exhaust hole, installation pipe 11 sets up outside the casing, two air guide branch pipe 12 all runs through the casing, and with casing sealing connection.

Further, preceding baffle 1 and back baffle 2 all with casing sealing connection, preceding baffle 1 and back baffle 2 separate into three cavities in with the casing: a front cavity is arranged between the front cover body and the front clapboard 1, a middle cavity is arranged between the front clapboard 1 and the rear clapboard 2, and a rear cavity is arranged between the rear cover body and the rear clapboard 2; the three chambers are communicated with each other through four through holes 10 on the front partition plate 1 and the rear partition plate 2; the second through hole 8 is positioned in the rear cavity, the first through hole 7 and the third through hole 9 are both positioned in the middle cavity, and the front end of the middle buffer tube 4 and the front end of the exhaust buffer tube 3 are both positioned in the front cavity; the rear end of the intermediate buffer tube 4 and the rear end of the intake buffer tube 5 are both located within the rear chamber; the joints of the two air guide branch pipes 12 and the air inlet buffer pipe 5 are positioned in the front cavity.

The working principle is as follows: tail gas enters the air inlet buffer tube 5 from the air inlet, enters the installation tube 11 through the air guide branch tube 12, is filtered by the exhaust filter element 15, reenters the air inlet buffer tube 5 through the other air guide branch tube 12, one part of the filtered tail gas enters the middle chamber through the first through hole 7, and the other part of the filtered tail gas enters the rear chamber through the second through hole 8; one part of tail gas in the rear cavity enters the middle cavity through a through hole four 10 formed in the rear partition board 2, and the other part of tail gas directly enters the middle buffer tube 4; one part of tail gas in the middle buffer tube 4 directly enters the front cavity from one end, located at the front cavity, of the middle buffer tube 4, and the other part of tail gas enters the middle cavity through the third through hole 9; tail gas in the middle chamber enters the front chamber through a fourth through hole 10 formed in the front partition plate 1, or a part of the tail gas enters the middle buffer tube 4 through a third through hole 9 and then enters the front chamber; the tail gas in the front chamber is discharged to the external environment through the exhaust buffer tube 3; after entering the air inlet buffer tube 5, the tail gas is shunted for many times, the tail gas flow velocity is reduced, and noise reduction is realized; when the exhaust filter element 15 needs to be replaced, the front end cover 13 is unscrewed, the exhaust filter element 15 is taken out, a new exhaust filter element 15 is placed into the installation pipe 11, the compression spring I16 is pressed into the installation pipe 11, the front end cover 13 is screwed down, and the rear end cover 14 can also be unscrewed to replace the exhaust filter element 15.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An automobile exhaust pipe core component comprises a front partition plate, a rear partition plate, an air inlet buffer tube and an exhaust buffer tube, wherein the front partition plate and the rear partition plate are arranged side by side and keep a distance; the front end port of the installation pipe is in threaded connection with a front end cover, the rear end port of the installation pipe is in threaded connection with a rear end cover, an exhaust filter element is arranged in the installation pipe and located between the two air guide branch pipes, a first compression spring and a second compression spring are arranged in the installation pipe, one end of the first compression spring is abutted to the front end cover, the other end of the first compression spring is abutted to the exhaust filter element, one end of the second compression spring is abutted to the rear end cover, and the other end of the second compression spring is abutted to the exhaust filter element; a pressure safety valve is arranged in the air inlet buffer pipe and is positioned between the two air guide branch pipes; the two air guide branch pipes are located on one side, far away from the rear clapboard, of the front clapboard.

2. The automotive exhaust tube core assembly of claim 1, further comprising an intermediate buffer tube and an intake buffer tube plug, wherein the front end of the intake buffer tube is an intake port, and the rear end of the intake buffer tube is hermetically connected to the intake buffer tube plug after passing through the front partition and the rear partition in sequence; the rear end of the exhaust buffer tube is an air outlet, and the front end of the exhaust buffer tube sequentially passes through the rear partition plate and the front partition plate; the middle buffer tube passes through the middle parts of the front clapboard and the rear clapboard, and the front end and the rear end of the middle buffer tube respectively extend out of the front part of the front clapboard and the rear part of the rear clapboard; the middle part of the air inlet buffer tube is provided with a plurality of first through holes, the rear part of the air inlet buffer tube is provided with a plurality of second through holes, the middle part of the middle buffer tube is provided with a plurality of third through holes, and the front partition plate and the rear partition plate are respectively provided with a plurality of fourth through holes.

3. The automotive exhaust tube core assembly of claim 2 wherein the length of the exhaust buffer tube front end extending beyond the front bulkhead is less than the length of the intake buffer tube front end extending beyond the front bulkhead; the length of the front end of the middle buffer tube extending out of the front partition plate is less than the length of the front end of the exhaust buffer tube extending out of the front partition plate; the length of the rear end of the air inlet buffer tube extending out of the rear partition plate is less than the length of the rear end of the air outlet buffer tube extending out of the rear partition plate; the length of the rear end of the middle buffer tube extending out of the rear partition plate is less than the length of the rear end of the air inlet buffer tube extending out of the rear partition plate.

4. The automotive exhaust tube core assembly as defined in claim 2 wherein the first and third vias are located between the front and rear spacers; the through hole is positioned behind the rear clapboard.

5. The automotive exhaust tube core assembly of claim 2, wherein said front and rear bulkheads are identical in shape and construction, said front and rear bulkheads being vertically disposed; the front partition plate and the rear partition plate are in sealing connection with the air inlet buffer tube, the middle buffer tube and the air exhaust buffer tube.

6. The automotive exhaust tube core assembly of claim 2, wherein the intake buffer tube, the intermediate buffer tube and the exhaust buffer tube are arranged in sequence from top to bottom.

7. An automobile exhaust pipe, comprising a casing, a front cover and a rear cover respectively arranged at the front end and the rear end of the casing, wherein the front cover is provided with an air inlet, the rear cover is provided with an air outlet, the automobile exhaust pipe core assembly of any one of claims 1-6 is further provided, the front partition, the rear partition, the air inlet buffer pipe plug, the air inlet buffer pipe, the middle buffer pipe and the air outlet buffer pipe are arranged in the casing, the front end of the air inlet buffer pipe is arranged in the air inlet, the rear end of the air outlet buffer pipe is arranged in the air outlet, the mounting pipe is arranged outside the casing, and the two air guide branch pipes all penetrate through the casing and are connected with the casing in a sealing way.

8. The exhaust pipe of claim 7, wherein the front partition and the rear partition are both sealingly connected to the housing, and the front partition and the rear partition divide the housing into three chambers: a front cavity is arranged between the front cover body and the front partition plate, a middle cavity is arranged between the front partition plate and the rear partition plate, and a rear cavity is arranged between the rear cover body and the rear partition plate; the three chambers are communicated with each other through the through holes on the front partition plate and the through holes on the rear partition plate; the through hole II is positioned in the rear cavity, the through hole I and the through hole III are both positioned in the middle cavity, and the front end of the middle buffer tube and the front end of the exhaust buffer tube are both positioned in the front cavity; the rear end of the middle buffer tube and the rear end of the air inlet buffer tube are both positioned in the rear chamber; the joints of the two air guide branch pipes and the air inlet buffer pipe are both positioned in the front cavity.