End cover with high sealing performance and automobile exhaust system

Abstract

The invention relates to the technical field of exhaust, in particular to a high-sealing-performance end cover and an automobile exhaust system.The high-sealing-performance end cover comprises a replaceable catalyst filtering structure, an exhaust manifold is installed on one end face of the replaceable catalyst filtering structure in a communicated mode, and a silencer is installed on the other end face of the replaceable catalyst filtering structure in a connected mode; the other end face of the silencer is provided with an exhaust tail pipe in a communicating mode. The replaceable catalyst filtering structure comprises a catalysis cavity, a plurality of catalyst partition plates, a sealing end cover and a U-shaped auxiliary end cover. According to the exhaust system, the harmful substance adsorption filtering material is regularly replaced through the replaceable catalyst filtering structure, so that the exhaust smoothness of the exhaust system is guaranteed, the clean quality of exhausted gas is guaranteed, the catalytic converter does not need to be replaced, and the use cost is reduced.

Description

Technical Field

[0001] The invention relates to a high-sealability end cover and an automobile exhaust system, belonging to the technical field of automobile exhaust systems. Background Art

[0002] The exhaust system of a car is one of the important components of the car engine system. Its main functions are: it is responsible for collecting and discharging the exhaust gas generated during the operation of the engine to ensure that the exhaust gas can be discharged smoothly; the muffler in the exhaust system can reduce the noise generated during the exhaust gas emission and improve driving comfort; the airflow is diverted through multiple channels, and the friction and collision between these diversions gradually reduce the flow rate of the airflow, and finally the exhaust gas is discharged through the exhaust pipe of the car, so that the noise is reduced and the effect of reducing noise is achieved; the harmful substance adsorption filter material in the exhaust system can purify the exhaust gas and convert the harmful substances in the exhaust gas into harmless substances, such as the three-way catalytic converter; the exhaust system can optimize the exhaust gas emission, make the exhaust gas emission smoother, and improve the performance of the engine.

[0003] However, the catalytic converters of existing automobile exhaust systems cannot regularly replace the harmful substance adsorption and filtering materials therein. After long-term use, the one-piece sealed catalytic converter will have poor exhaust gas adsorption and filtering effects, which will lead to problems such as poor exhaust flow in the exhaust system and substandard exhaust gas. The catalytic converter needs to be replaced, increasing the cost of use. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a high-sealability end cap that can regularly replace harmful substance adsorption and filtering materials. The present invention also provides an automobile exhaust system using the high-sealability end cap.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A high-sealing end cover comprises a replaceable catalyst filter structure, one end face of the replaceable catalyst filter structure is connected and installed with an exhaust manifold, the other end face of the replaceable catalyst filter structure is connected and installed with a muffler, the other end face of the muffler is connected and installed with an exhaust tail pipe, the replaceable catalyst filter structure comprises a catalytic cavity, a plurality of catalyst baffles sequentially embedded in the catalytic cavity, a sealing end cover embedded at the bottom open end of the catalytic cavity, and U-shaped auxiliary end covers embedded at both sides of the catalytic cavity.

[0007] Furthermore, a side of the sealing end cover in contact with the catalytic cavity is provided with a high-temperature resistant sealing ridge, and a sealing groove adapted to the high-temperature resistant sealing ridge is provided on the bottom open end surface of the catalytic cavity, and the sealing end cover is fixed to the catalytic cavity by a first bolt at the edge.

[0008] Furthermore, a snap-in block is provided at the edge of the catalyst partition in contact with the inner cavity of the catalyst chamber, the inner cavity of the catalyst chamber is provided with a snap-in groove adapted to the snap-in block, a plurality of flow holes are provided through the catalyst partition, and a handle groove is provided through the catalyst partition on one side close to the sealing end cover.

[0009] Furthermore, T-shaped grooves are provided on both sides of the catalytic cavity, and a T-shaped protrusion adapted to the T-shaped groove is provided on the U-shaped auxiliary end cover, and the U-shaped auxiliary end cover is fixed to the catalytic cavity by a second bolt.

[0010] Furthermore, the exhaust manifold includes a main pipe, a connecting cross pipe arranged on the main pipe for communication, and a plurality of branch pipes arranged on the connecting cross pipe for communication.

[0011] Furthermore, the exhaust manifold is connected to the replaceable catalyst filter structure via a header, and the header includes a header cavity and a first flow tube connected and installed on a side close to the replaceable catalyst filter structure.

[0012] Furthermore, one end of the first flow tube is fixedly connected to the manifold through a third bolt, and the other end of the first flow tube is fixedly connected to the replaceable catalyst filtering structure through the third bolt.

[0013] Furthermore, air inlets are provided on both sides of the manifold, the main pipe is fixedly connected to one of the air inlets by a fourth bolt, and a sealing cover is fixedly installed on the other air inlet by the fourth bolt.

[0014] Furthermore, the muffler is connected to the replaceable catalyst filter structure via a second flow pipe, and the exhaust tail pipe is fixedly connected to the muffler via a fifth bolt.

[0015] Furthermore, one end of the second flow tube is fixedly connected to the replaceable catalyst filter structure through a sixth bolt, and the other end of the second flow tube is fixedly connected to the muffler through the sixth bolt.

[0016] The invention also provides an automobile exhaust system, which comprises the high-sealability end cover.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention uses a replaceable catalyst filter structure to regularly replace the harmful substance adsorption filter material, thereby avoiding the phenomenon that the replaceable catalyst filter structure has a poor exhaust gas adsorption and filtration effect after long-term use, ensuring the exhaust fluency of the exhaust system and the clean quality of the exhaust gas, and there is no need to replace the catalytic converter, which helps to reduce the cost of use.

[0019] 2. The present invention can also remove the catalytic cavity and the catalytic partition in the replaceable catalytic filter structure from the exhaust system, and clean the inner cavity of the catalytic cavity and the catalytic partition in time to extend the service life of the catalytic cavity and the catalytic partition. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a half-section static assembly schematic diagram of the replaceable catalyst filter structure of the present invention;

[0021] Figure 2 It is a schematic diagram of static assembly of the replaceable catalyst filter structure of the present invention;

[0022] Figure 3 It is a schematic diagram of static assembly of the exhaust manifold of the present invention;

[0023] Figure 4 It is a schematic diagram of static assembly of the muffler and the exhaust tail pipe of the present invention;

[0024] Figure 5 It is a schematic diagram of the overall structure of the present invention.

[0025] In the figure, 1. replaceable catalyst filter structure; 2. exhaust manifold; 3. muffler; 4. exhaust tail pipe; 5. catalyst cavity; 6. catalyst baffle; 7. sealing end cover; 8. U-shaped auxiliary end cover; 9. high temperature resistant sealing convex strip; 10. sealing groove; 11. first bolt; 12. card embedding block; 13. card embedding groove; 14. air flow hole; 15. handle groove; 16. T-shaped groove; 17. T-shaped convex block; 18. second bolt; 19. collecting pipe; 20. collecting chamber; 21. first flow pipe; 22. third bolt; 23. air inlet; 24. fourth bolt; 25. sealing cover; 26. second flow pipe; 27. fifth bolt; 28. sixth bolt; 29. ​​main pipe; 30. connecting cross pipe; 31. branch pipe. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0027] like Figure 1-Figure 5As shown, the present embodiment provides a high sealing end cover, which includes a replaceable catalyst filter structure 1, one end surface of the replaceable catalyst filter structure 1 is connected to and installed with an exhaust manifold 2, the other end surface of the replaceable catalyst filter structure 1 is connected to and installed with a muffler 3, the other end surface of the muffler 3 is connected to and installed with an exhaust tail pipe 4, the replaceable catalyst filter structure 1 includes a catalytic cavity 5, a plurality of catalyst baffles 6 sequentially embedded in the catalytic cavity 5, a sealing end cover 7 embedded in the bottom opening end of the catalytic cavity 5, and U-shaped auxiliary end covers 8 embedded in both sides of the catalytic cavity 5. The replaceable catalyst filter structure 1 is used for adsorbing and filtering the exhaust gas to be discharged from the device, preventing harmful substances in the exhaust gas from being discharged into the air, and converting harmful substances in the exhaust gas into harmless substances; the exhaust manifold 2 is used for collecting the exhaust gas generated in each cylinder of the engine cylinder body and introducing it into the replaceable catalyst filter structure 1 for adsorption and filtration treatment; the muffler 3 is used to reduce the exhaust noise generated when the engine is working, and also helps to extend the service life of the exhaust system; the exhaust tail pipe 4 is used for the qualified gas to come out of the exhaust system after a series of treatments and enter the air; the catalytic cavity 5 is used for placing the adsorption and filtration material absorbed by the catalytic reaction of harmful gases, and allowing the exhaust gas to be adsorbed and filtered in the catalytic cavity 5, so that the exhaust gas becomes harmless gas, and at the same time the catalytic cavity 5 supports and fixes the catalyst partition 6 and the sealing end The functions of the cover 7 and the U-shaped auxiliary end cover 8; the catalyst partition 6 is used to separate the adsorption filter materials absorbed by the catalytic reaction of different harmful gases, thereby forming a plurality of harmful gas catalytic reaction absorption filter chambers, so as to carry out targeted catalytic absorption and filtration of toxic substances in the exhaust gas, so as to filter the harmful substances in the exhaust gas more thoroughly; the sealing end cover 7 is used to open or close the catalytic cavity 5 to replace the adsorption filter materials absorbed by the catalytic reaction of multiple harmful gases in the inner cavity of the catalytic cavity 5 and to clean the inner cavity of the catalytic cavity and the catalyst partition in time, so as to ensure that the replaceable catalyst filter structure 1 is always in the best state for exhaust gas adsorption and filtration, and at the same time can seal the open end at the bottom of the catalytic cavity 5; the U-shaped auxiliary end cover 8 is used to assist the sealing end cover 7 in tightly sealing the cover, and at the same time protect the sealing end cover 7.

[0028] In this embodiment, Figure 1 and Figure 2As shown, a side of the sealing end cover 7 in contact with the catalytic cavity 5 is provided with a high-temperature resistant sealing ridge 9, and a sealing groove 10 adapted to the high-temperature resistant sealing ridge 9 is provided on the bottom open end face of the catalytic cavity 5, and the sealing end cover 7 is fixed to the catalytic cavity 5 by a first bolt 11 at the edge, and the high-temperature resistant sealing ridge 9 and the sealing groove 10 are engaged with each other, so that the sealing end cover 7 can be tightly fitted on the catalytic cavity 5; the first bolt 11 is used to tighten and fix the sealing end cover 7 and the catalytic cavity 5 that are tightly fitted together, and the high-temperature resistant sealing ridge 9 is squeezed so as to fit tightly on the groove wall of the sealing groove 10, so the high-temperature resistant sealing ridge 9, the sealing groove 10 and the first bolt 11 can achieve a high-tightness sealing between the sealing end cover 7 and the catalytic cavity 5.

[0029] In this embodiment, Figure 1 and Figure 2 As shown, the edge of the catalyst partition 6 in contact with the inner cavity of the catalytic cavity 5 is provided with a card embedding block 12, the inner cavity of the catalytic cavity 5 is provided with a card embedding groove 13 adapted to the card embedding block 12, a plurality of flow air holes 14 are provided through the catalyst partition 6, and a handle groove 15 is provided through the catalyst partition 6 on the side close to the sealing end cover 7; the card embedding block 12 is used to insert the catalyst partition 6 into the inner cavity of the catalytic cavity 5, the card embedding groove 13 is used to limit the position of the catalyst partition 6 that is removed and stuck in the inner cavity of the catalytic cavity 5, the flow air holes 14 allow the gas to flow smoothly in each harmful gas catalytic reaction absorption filter cavity after the catalyst partition 6 divides the catalytic cavity 5 into a plurality of harmful gas catalytic reaction absorption filter cavities, so as to effectively catalyze the adsorption reaction of harmful substances in the exhaust gas, and the handle groove 15 is used to pull the catalyst partition 6 out of the catalytic cavity 5, and clean or replace the catalyst partition 6.

[0030] In this embodiment, Figure 1 and Figure 2 As shown, T-shaped grooves 16 are provided on both sides of the catalytic cavity 5, and a T-shaped protrusion 17 adapted to the T-shaped grooves 16 is provided on the U-shaped auxiliary end cover 8, and the U-shaped auxiliary end cover 8 is fixed to the catalytic cavity 5 by a second bolt 18; the T-shaped grooves 16 and the T-shaped protrusions 17 are mutually limited and embedded to facilitate the U-shaped auxiliary end cover 8 to be slidably embedded on both sides of the catalytic cavity 5, so that the catalytic cavity 5 can support and limit the U-shaped auxiliary end cover 8, and then the U-shaped auxiliary end cover 8 can squeeze and hold the sealing end cover 7, and protect the sealing end cover 7 to prevent the sealing end cover 7 from being bumped and the like, which may cause leakage of the high sealing performance of the sealing end cover 7 and the catalytic cavity 5; the second bolt 18 is used to tighten and fix the U-shaped auxiliary end cover 8 that is slidably embedded on the catalytic cavity 5 to prevent the U-shaped auxiliary end cover 8 from sliding back and forth on the catalytic cavity 5 and failing to provide more comprehensive protection for the sealing end cover 7.

[0031] In this embodiment, Figure 3As shown, the exhaust manifold 2 includes a main pipe 29, a connecting cross pipe 30 connected to the main pipe 29, and a plurality of branch pipes 31 connected to the connecting cross pipe 30; the main pipe 29 is used to support and fix the connecting cross pipe 30, the connecting cross pipe 30 is used to connect the main pipe 29 with the plurality of branch pipes 31, and the plurality of branch pipes 31 are used to be respectively connected to the various cylinders in the engine cylinder body to avoid interference between the various cylinders in the engine cylinder body.

[0032] In this embodiment, Figure 5 As shown, the exhaust manifold 2 and the replaceable catalyst filter structure 1 are connected via a collecting pipe 19, and the collecting pipe 19 includes a collecting chamber 20 and a first flow pipe 21 which is connected and installed on a side close to the replaceable catalyst filter structure 1; the collecting pipe 19 is used to connect the exhaust manifold 2 and the replaceable catalyst filter structure 1 to each other, and the collecting chamber 20 is used to converge the exhaust gas from the exhaust manifold 2, and the collecting chamber 20 is also used to connect the main pipe 29 with the first flow pipe 21, and the first flow pipe 21 is used to smoothly flow the exhaust gas converged into the collecting chamber 20 into the replaceable catalyst filter structure 1, and the first flow pipe 21 is also used to connect the collecting chamber 20 with the catalytic chamber 5.

[0033] In this embodiment, Figure 1 , Figure 2 , Figure 3 as well as Figure 5 As shown, one end of the first flow tube 21 is fixedly connected to the manifold 20 by a third bolt 22, and the other end of the first flow tube 21 is fixedly connected to the replaceable catalyst filter structure 1 by the third bolt 22; the third bolt 22 is used to fix one end of the first flow tube 21 to the manifold 20, and at the same time, it is convenient to fix the other end of the first flow tube 21 to the catalytic cavity 5 in the replaceable catalyst filter structure 1. When it is found that the first flow tube 21 is squeezed, bent or excessively worn, the first flow tube 21 can be promptly replaced or maintained by the third bolt 22.

[0034] In this embodiment, Figure 3As shown, both sides of the manifold 20 are provided with air inlets 23, the main pipe 29 is fixedly connected to one of the air inlets 23 by a fourth bolt 24, and a sealing cover 25 is fixedly installed on the other air inlet 23 by a fourth bolt 24, and the air inlet 23 facilitates the exhaust gas in the exhaust manifold 2 to smoothly enter the manifold 20; the exhaust manifold 2 is installed on one air inlet 23, and the sealing cover 25 is installed on the other air inlet 23, so that when the engine has more single cylinders, the sealing cover 25 installed on the other air inlet 23 can be removed. And install the exhaust manifold 2 to adapt to the engine with more single cylinders. If the exhaust manifold 2 on one side is just enough, there is no need to consider it. The fourth bolt 24 is used to fix the exhaust manifold 2 on the air inlet 23 on one side of the manifold 20. At the same time, the fourth bolt 24 is also convenient for fixing the sealing cover 25 on the air inlet 23 on the other side of the manifold 20. The sealing cover 25 is used to seal the idle air inlet 23. The fourth bolt 24 is also convenient for disassembling the exhaust manifold 2 and cleaning or replacing the exhaust manifold 2.

[0035] In this embodiment, Figure 1 , Figure 2 as well as Figure 4 As shown, the muffler 3 is connected to the replaceable catalyst filter structure 1 via a second flow tube 26, and the exhaust tail pipe 4 is fixedly connected to the muffler 3 via a fifth bolt 27; the second flow tube 26 is used to connect the muffler 3 to the catalytic cavity 5 in the replaceable catalyst filter structure 1, so that the gas after catalytic adsorption treatment in the replaceable catalyst filter structure 1 flows into the muffler 3, and the fifth bolt 27 is used to fix the exhaust tail pipe 4 on the muffler 3, so that the gas after the silencer treatment can be smoothly discharged from the exhaust tail pipe 4, and the exhaust tail pipe 4 can also be disassembled by the fifth bolt 27, and the exhaust tail pipe 4 can be cleaned or replaced.

[0036] In this embodiment, Figure 1 , Figure 2 , Figure 4 as well as Figure 5 As shown, one end of the second flow tube 26 is fixedly connected to the replaceable catalyst filter structure 1 by the sixth bolt 28, and the other end of the second flow tube 26 is fixedly connected to the muffler 3 by the sixth bolt 28; the sixth bolt 28 is used to fix one end of the second flow tube 26 to the catalytic cavity 5 on the replaceable catalyst filter structure 1, and it is also convenient to fix the other end of the second flow tube 26 to the muffler 3. When it is found that the second flow tube 26 is squeezed, bent or excessively worn, the second flow tube 26 can be promptly replaced or maintained by the sixth bolt 28.

[0037] like Figure 1-Figure 5 As shown, the working process of the high-sealability end cover and automobile exhaust system provided by this embodiment is as follows:

[0038] When using the device, the number of single cylinders of the engine should be considered first. When the number of single cylinders is large, the exhaust manifold 2 needs to be installed on the air inlets 23 on both sides of the manifold 20. If the number of single cylinders is small, the exhaust manifold 2 only needs to be installed on the air inlet 23 on one side of the manifold 20.

[0039] During installation, the several branch pipes 31 on the exhaust manifold 2 should be fixedly connected to each single cylinder of the engine first, and then the main pipe in the exhaust manifold 2 should be fixedly connected to the manifold 20 through the fourth bolt 24, and the sealing cover 25 should be installed on the idle air inlet 23 on the other side of the manifold 20 and tightened and fixed through the fourth bolt 24, and then one end of the first flow pipe should be fixedly connected to the manifold 20 through the third bolt 22, and the other end of the first flow pipe should be fixedly connected to the catalytic cavity 5 through the third bolt 22, and then one end of the second flow pipe 26 should be fixedly connected to the catalytic cavity 5 through the sixth bolt 28, and the other end of the second flow pipe 26 should be fixedly connected to the muffler 3 through the sixth bolt 28, and the exhaust tail pipe 4 should be fixedly connected to the muffler 3 through the fifth bolt 27;

[0040] After the general framework of the device is installed, a plurality of catalyst partitions 6 can be sequentially inserted and installed on the catalyst cavity 5. The plurality of catalyst partitions 6 will divide the catalyst cavity 5 into a plurality of cavities. At this time, the solid adsorption filter materials absorbed by different catalytic reactions can be sequentially placed on the sealing end cover 7, and then the sealing end cover 7 is inserted and fixedly sealed on the catalyst cavity 5 by the first bolt 11, and the U-shaped auxiliary end cover 8 is slidably inserted and installed on both sides of the catalyst cavity 5, and finally the U-shaped auxiliary end cover 8 is fixedly installed on both sides of the catalyst cavity 5 by the second bolt 18.

[0041] When the device is in use, the exhaust gas generated by the engine operation will be introduced into the connecting cross pipe 30 through the branch pipe 31 connected to the single cylinder, and then converge into the main pipe 29, and then enter the manifold 20 from the main pipe 29, and then enter the first flow pipe 21 from the manifold 20, and then enter the catalytic cavity 5 after entering the first flow pipe 21, and then the harmful gas will be catalytically reacted and absorbed in the catalytic cavity 5, and the reacted gas will flow into the muffler 3 for vibration reduction and noise reduction, and the gas coming out of the muffler 3 will be discharged into the air through the exhaust tail pipe 4;

[0042] After long-term use, the second bolt 18 can be unscrewed and the U-shaped auxiliary end cover 8 can be removed from the catalytic cavity 5, and then the first bolt 11 can be unscrewed to remove the sealing end cover 7, and the solid adsorption filter material absorbed by the saturated catalytic reaction can be taken out, and the catalyst partition 6 can be removed and brushed clean. At the same time, the inner cavity of the catalytic cavity 5 can also be brushed clean, and then the cleaned catalyst partition 6 can be installed, and new solid adsorption filter material absorbed by the catalytic reaction can be placed on the sealing end cover 7 in turn, and the sealing end cover 7 can be clamped on the catalytic cavity 5, and the sealing end cover 7 can be fixedly and sealedly installed on the catalytic cavity 5 by the first bolt 11, and the U-shaped auxiliary end cover 8 can be slidably embedded and installed on both sides of the catalytic cavity 5, and finally the U-shaped auxiliary end cover 8 can be fixedly installed on both sides of the catalytic cavity 5 by the second bolt 18.

[0043] The above description shows and describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein, and that changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention should be within the scope of protection of the claims attached to the present invention.

Claims

1. A highly sealing end cap, comprising a replaceable catalyst filter structure (1), characterized in that: One end surface of the replaceable catalyst filter structure (1) is connected to an exhaust manifold (2), the other end surface of the replaceable catalyst filter structure (1) is connected to a muffler (3), and the other end surface of the muffler (3) is connected to an exhaust tail pipe (4); The replaceable catalyst filter structure (1) comprises a catalyst cavity (5), a plurality of catalyst partitions (6) sequentially snap-fitted into the catalyst cavity (5), a sealing end cover (7) snap-fitted into the bottom opening end of the catalyst cavity (5), and U-shaped auxiliary end covers (8) snap-fitted into both sides of the catalyst cavity (5); The exhaust manifold (2) comprises a main pipe (29), a connecting cross pipe (30) arranged in communication with the main pipe (29), and a plurality of branch pipes (31) arranged in communication with the connecting cross pipe (30).

2. The high-sealability end cap according to claim 1, characterized in that: A high temperature resistant sealing convex strip (9) is provided on the side of the sealing end cover (7) in contact with the catalytic cavity (5), a sealing groove (10) adapted to the high temperature resistant sealing convex strip (9) is provided on the bottom open end surface of the catalytic cavity (5), and the sealing end cover (7) is fixed to the catalytic cavity (5) by a first bolt (11) at the edge.

3. The high-sealability end cap according to claim 1, characterized in that: The edge of the catalyst separator (6) in contact with the inner cavity of the catalyst chamber (5) is provided with a card embedding block (12), the inner cavity of the catalyst chamber (5) is provided with a card embedding groove (13) adapted to the card embedding block (12), the catalyst separator (6) is provided with a plurality of flow holes (14), and the catalyst separator (6) is provided with a handle groove (15) on one side close to the sealing end cover (7).

4. The high-sealability end cap according to claim 1, characterized in that: T-shaped grooves (16) are provided on both sides of the catalytic cavity (5), and a T-shaped protrusion (17) adapted to the T-shaped grooves (16) is provided on the U-shaped auxiliary end cover (8), and the U-shaped auxiliary end cover (8) is fixed to the catalytic cavity (5) by a second bolt (18).

5. The high-sealability end cap according to claim 1, characterized in that: The exhaust manifold (2) is connected to the replaceable catalyst filter structure (1) via a header (19), and the header (19) comprises a header cavity (20) and a first flow tube (21) which is connected and installed on a side close to the replaceable catalyst filter structure (1).

6. The high-sealability end cap according to claim 5, characterized in that: One end of the first flow tube (21) is fixedly connected to the manifold (20) via a third bolt (22), and the other end of the first flow tube (21) is fixedly connected to the replaceable catalyst filter structure (1) via the third bolt (22).

7. The high-sealability end cap according to claim 6, characterized in that: Air inlets (23) are provided on both sides of the manifold (20); the main pipe (29) is fixedly connected to one of the air inlets (23) via a fourth bolt (24); and a sealing cover (25) is fixedly mounted on the other air inlet (23) via the fourth bolt (24).

8. The high-sealability end cap according to claim 1, characterized in that: The muffler (3) and the replaceable catalyst filter structure (1) are connected via a second flow pipe (26), and the exhaust tail pipe (4) is fixedly connected to the muffler (3) via a fifth bolt (27).

9. The high-sealability end cap according to claim 8, characterized in that: One end of the second flow tube (26) is fixedly connected to the replaceable catalyst filter structure (1) via a sixth bolt (28), and the other end of the second flow tube (26) is fixedly connected to the muffler (3) via the sixth bolt (28).

10. An automobile exhaust system, characterized in that: The invention comprises the high sealing end cover as described in any one of claims 1 to 9.

Images