Rear commercial bus exhaust structure and automobile

Abstract

The invention relates to the technical field of commercial passenger cars, and discloses a rear-mounted commercial passenger car exhaust structure and an automobile. The rear-mounted commercial passenger car exhaust structure comprises a silencer, the rear end of a silencing net in the silencer is connected with an exhaust tail pipe, the rear end of the exhaust tail pipe extends to the outer side of a rear wall, and the front end of the exhaust tail pipe is provided with a bent pipe section connected with the rear end of the silencing net; the section of the bent pipe section is in a semi-arc shape, and the bent pipe section is arranged in an inverted mode so as to increase the ground clearance. The distance between the highest passing point of the bent pipe section and the ground can be effectively increased, accumulated water on the road surface can be effectively prevented from flowing backwards into the silencer under the extreme water accumulation condition, the interior of the silencer is prevented from being corroded by the accumulated water and sludge, irreversible damage caused by internal blockage of the silencer and the like is prevented, the service life of the exhaust silencer or a post-processing system is prolonged, and the service life of the exhaust silencer or the post-processing system is prolonged. In addition, tail gas is discharged smoothly, it is guaranteed that the vehicle still has stable power output in an extremely severe environment, and the trafficability of the vehicle is improved.

Description

Technical Field

[0001] The invention relates to the technical field of commercial buses, in particular to a rear-mounted commercial bus exhaust structure and a vehicle. Background Art

[0002] In recent years, urban waterlogging has become a common problem. At the same time, with the increase in automobile exports, complete vehicle products have flowed to some low- and medium-sized developing countries. The basic road construction in these countries is extremely backward, and deep potholes and waterlogging on the road are extremely challenging for vehicle trafficability. The exhaust system is an important part of engine exhaust treatment. The exhaust system is generally arranged at the rear and lower position of the chassis module. When encountering waterlogged road conditions, there is a risk that water will enter the exhaust system muffler or post-treatment.

[0003] Common exhaust system layouts in the commercial bus market are as follows: Figure 2 As shown, the silencer net inside the muffler is straight-through, and the exhaust gas is directly discharged at the rear. The rear end of the silencer net is connected to the exhaust tail pipe, and the exhaust tail pipe sprays downward from the rear. The exhaust tail pipe is a two-stage type, including a straight section and an inclined section connected to the rear end of the straight section. When encountering extreme water accumulation, the road water level reaches the straight section of the exhaust tail pipe. At this time, the road surface water is likely to flow back into the muffler, causing irreversible damage such as corrosion and silt blockage to the inside of the muffler, affecting the life of the exhaust muffler or post-treatment system. In addition, it blocks the exhaust gas discharge, causing the engine to stall midway, or the engine power output to weaken, and the vehicle breaks down in the flooded section, seriously affecting the vehicle's passability. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a rear-mounted commercial passenger bus exhaust structure and a vehicle. By improving the structural shape of the exhaust tail pipe, it can effectively prevent road surface water from flowing back into the muffler under extreme water accumulation conditions, prevent the inside of the muffler from being corroded by accumulated water and silt, prevent irreversible damage caused by blockage inside the muffler, and extend the life of the exhaust muffler or post-treatment system.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] In a first aspect, a rear-mounted commercial bus exhaust structure includes a muffler, wherein a rear end of a silencer mesh inside the muffler is connected to an exhaust tail pipe, the rear end of the exhaust tail pipe extends to the outside of a rear enclosure, and a front end of the exhaust tail pipe is provided with a curved pipe section connected to the rear end of the silencer mesh, wherein the curved pipe section has a semicircular arc cross-section and is inverted to increase ground clearance.

[0007] As a further implementation method, the ports at both ends of the curved pipe section are connected to the vertical pipe section, and the curved pipe section and the two vertical pipe sections form an inverted U-shaped structure.

[0008] As a further implementation, the curved pipe section and the two vertical pipe sections are an integrated structure.

[0009] As a further implementation, the rear end of the exhaust tail pipe includes a group of horizontal straight pipe sections and a group of inclined pipe sections inclined downward.

[0010] As a further implementation method, the inclined pipe section is connected to the rear end of the straight pipe section, and the front end of the straight pipe section is connected to the bottom end of the vertical pipe section at the rear end of the curved pipe section.

[0011] As a further implementation method, the curved pipe section, the straight pipe section, the vertical pipe section, and the inclined pipe section have the same inner diameter, the same outer diameter, and the same wall thickness.

[0012] As a further implementation method, the rear end of the silencer net inside the silencer is configured to be upwardly curved, the front end of the upwardly curved silencer net is used to connect to the horizontal straight pipe silencer net, and the rear end extends vertically upward.

[0013] As a further implementation method, the lower end of the vertical pipe section connected to the front section of the curved pipe section is connected to the rear end of the upward curved silencer net, the inner diameter of the upward curved silencer net is adapted to the inner diameter of the exhaust tail pipe, and the two are plugged together.

[0014] As a further implementation method, the vertical pipe section is connected to the rear end of the upward curved silencer net via a clamp.

[0015] In a second aspect, a car is provided with an exhaust structure, wherein the exhaust structure adopts any of the above-mentioned rear-mounted commercial bus exhaust structures.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The front end of the exhaust tail pipe of the present invention is provided with a curved pipe section connected to the rear end of the silencer net. The cross-section of the curved pipe section is semicircular, and the curved pipe section is inverted, which can effectively increase the distance between the highest passing point of the curved pipe section and the ground, and can effectively prevent the road surface water from flowing back into the muffler under extreme water accumulation conditions, prevent the inside of the muffler from being corroded by water and silt, prevent irreversible damage caused by internal blockage of the muffler, etc., and improve the life of the exhaust muffler or post-treatment system. In addition, the exhaust gas is discharged smoothly, ensuring that the vehicle still has a stable power output in extremely harsh environments, and improving the vehicle's passability.

[0018] 2. The rear end of the silencer net inside the silencer of the present invention is configured to be bent upward so as to be effectively connected to the bottom end of the first vertical pipe section at the front section of the curved pipe section. The bottom end of the first vertical pipe section and the rear end of the silencer net are fixedly connected by a clamp.

[0019] 3. The curved pipe section of the present invention is connected between the first vertical pipe section and the second vertical pipe section to form an inverted U-shaped tubular structure. By adjusting the length of the vertical pipe section, the ground clearance of the highest passing point of the curved pipe section can be effectively increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] Figure 1 is a front view of a rear-mounted commercial bus exhaust structure according to an embodiment of the present invention;

[0022] Figure 2 It is the front view of the existing rear-mounted commercial bus exhaust structure.

[0023] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0024] Wherein: 1. Exhaust pipe, 2. Fixing parts, 3. Straight-through silencer net; 4. Exhaust tail pipe, 5. Clamp, 6. Silencer net, 41. Bend pipe section, 42. Vertical pipe section. DETAILED DESCRIPTION

[0025] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0026] As mentioned in the background technology, Figure 2 As shown, the rear end of the straight-through silencer net 3 inside the muffler is connected to the exhaust pipe 1 through the fixing member 2. The exhaust pipe 1 extends horizontally backward to the rear end position and extends obliquely downward to the outside of the rear enclosure. When the water level reaches the horizontal section of the exhaust pipe 1, the road surface water is likely to flow back into the muffler, causing irreversible damage such as corrosion and silt blockage to the inside of the muffler. In order to solve this technical problem, the following embodiment 1 is proposed.

[0027] Embodiment 1

[0028] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a rear-mounted commercial bus exhaust structure includes a muffler, a rear end of a muffler mesh 6 inside the muffler is connected to an exhaust tail pipe, a rear end of the exhaust tail pipe 4 extends to the outside of the rear enclosure, and a front end of the exhaust tail pipe 4 is provided with a curved pipe section 41 connected to the rear end of the muffler mesh 6, the cross-section of the curved pipe section 41 is semicircular, and the curved pipe section 41 is inverted to increase the ground clearance.

[0029] By improving the structure of the exhaust tail pipe 4, the ground clearance of the curved pipe section 41 of the exhaust tail pipe 4 is greatly increased, thereby reducing the risk of accumulated water flowing back into the muffler and causing corrosion to the inside of the muffler.

[0030] Specifically, Figure 1 As shown, the two ends of the curved pipe section 41 of this embodiment are connected to the vertical pipe section, wherein the vertical pipe section 42 connected to the front end port of the curved pipe section 41 is the first vertical pipe section, and the vertical pipe section 42 connected to the rear end port of the curved pipe section 41 is the second vertical pipe section. The curved pipe section 41 is connected between the first vertical pipe section and the second vertical pipe section.

[0031] The curved pipe section 41, the first vertical pipe section and the second vertical pipe section together form an inverted U-shaped exhaust pipe structure. Since the U-shaped exhaust pipe structure is inverted, the bottom end of the curved pipe section 41 is the top end of the vertical pipe section, and the top end of the curved pipe section 41 is much higher than the top end of the vertical pipe section, thereby increasing the distance between the top end of the curved pipe section 41 and the ground and reducing the risk of water on the road entering the muffler.

[0032] like Figure 1 As shown, the rear end of the exhaust tail pipe 4 includes a group of horizontal straight pipe sections and a group of inclined pipe sections inclined downward, wherein the inclined pipe sections are connected to the rear end of the straight pipe sections, and the front end of the straight pipe sections is connected to the bottom end of the second vertical pipe section at the rear end of the curved pipe section 41.

[0033] It can be understood that the curved pipe section 41, the vertical pipe section 42 (the first vertical pipe section and the second vertical pipe section), the straight pipe section, and the inclined pipe section together constitute the overall structure of the exhaust tail pipe 4, and each pipe section is an integrated structure. Therefore, the curved pipe section 41, the straight pipe section, the vertical pipe section 42, and the inclined pipe section have the same inner diameter, the same outer diameter, and the same wall thickness.

[0034] In order to achieve a smooth connection between the rear end of the silencer net inside the muffler and the first vertical pipe section of the exhaust tail pipe 4, the rear end of the silencer net 6 inside the muffler is set to be upwardly curved, and the upwardly curved silencer net is set in an arc shape with an arc of 90°, so that the rear end of the upwardly curved silencer net extends vertically upward to the top opening of the muffler shell. The front end of the upwardly curved silencer net is used to connect the horizontal straight pipe silencer net.

[0035] The lower end of the first vertical pipe section is connected to the top of the upward curved silencer net, the inner diameter of the upward curved silencer net is adapted to the inner diameter of the exhaust tail pipe 4, the two are plugged together, and the bottom end of the first vertical pipe section is fixedly connected to the rear end of the upward curved silencer net through a clamp 5.

[0036] In other examples, the bottom end of the first vertical pipe section is connected to an arc-shaped elbow, and the front end of the elbow is connected to a straight-through silencer net. In this case, the rear end of the straight-through silencer net should extend to the rear end of the silencer shell.

[0037] The front end of the exhaust tail pipe 4 of the present embodiment is in an inverted U-shape, which can effectively prevent the road water level from reaching the straight section of the exhaust tail pipe 4 when there is extreme water accumulation. However, there is still a large space on the upper part to prevent the water on the road from flowing back into the muffler, thereby preventing the inside of the muffler from being corroded or blocked by water and silt, causing irreversible damage, thereby improving the life of the exhaust muffler or post-treatment system. In addition, the exhaust gas is discharged smoothly, ensuring that the vehicle still has stable power output in extremely harsh environments, thereby improving the vehicle's passability.

[0038] In this embodiment, the lengths of the first vertical pipe section and the second vertical pipe section are the same. The lengths of the first vertical pipe section and the second vertical pipe section can be determined specifically according to needs. In the case of poor road flooding environment, the lengths of the first vertical pipe section and the second vertical pipe section can be appropriately increased.

[0039] Embodiment 2

[0040] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a car is provided with an exhaust structure, and the exhaust structure adopts the rear-mounted commercial bus exhaust structure described in Example 1.

[0041] By optimizing the muffler outlet and the internal muffler net structure, and designing a U-shaped exhaust tail pipe and its sealing structure, the ground clearance can be effectively increased. At the same time, the engine exhaust pressure is used to prevent the backflow of road water, improve the vehicle's passability, and ensure that the vehicle still has stable power output in extremely harsh environments. The improvement plan is reliable and feasible.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rear-mounted commercial bus exhaust structure, characterized in that: It includes a muffler, the rear end of the silencer net inside the muffler is connected to the exhaust tail pipe, the rear end of the exhaust tail pipe extends to the outside of the rear enclosure, the front end of the exhaust tail pipe is provided with a curved pipe section connected to the rear end of the silencer net, the cross-section of the curved pipe section is semicircular, and the curved pipe section is inverted to increase the ground clearance.

2. A rear-mounted commercial passenger vehicle exhaust structure according to claim 1, characterized in that: The ends of the curved pipe section are connected to the vertical pipe section, and the curved pipe section and the two vertical pipe sections form an inverted U-shaped structure.

3. A rear-mounted commercial passenger vehicle exhaust structure according to claim 2, characterized in that: The curved pipe section and the two vertical pipe sections are an integrated structure.

4. A rear-mounted commercial passenger vehicle exhaust structure according to claim 2, characterized in that: The rear end of the exhaust tail pipe includes a group of horizontal straight pipe sections and a group of inclined pipe sections inclined downward.

5. A rear-mounted commercial passenger vehicle exhaust structure according to claim 4, characterized in that: The inclined pipe section is connected to the rear end of the straight pipe section, and the front end of the straight pipe section is connected to the bottom end of the vertical pipe section at the rear end of the curved pipe section.

6. A rear-mounted commercial bus exhaust structure according to claim 5, characterized in that: The curved pipe section, the straight pipe section, the vertical pipe section and the inclined pipe section have the same inner diameter, the same outer diameter and the same wall thickness.

7. The rear-mounted commercial passenger vehicle exhaust structure according to claim 2, characterized in that: The rear end of the silencer net inside the silencer is configured to be upwardly curved, the front end of the upwardly curved silencer net is used to connect to the horizontal straight pipe silencer net, and the rear end extends vertically upward.

8. The rear-mounted commercial passenger vehicle exhaust structure according to claim 7, characterized in that: The lower end of the vertical pipe section connected to the front section of the curved pipe section is connected to the rear end of the upward curved silencer net, and the inner diameter of the upward curved silencer net is adapted to the inner diameter of the exhaust tail pipe, and the two are plugged together.

9. A rear-mounted commercial passenger vehicle exhaust structure according to claim 8, characterized in that: The vertical pipe section is connected to the rear end of the upward curved silencer net through a clamp.

10. An automobile, characterized in that: An exhaust structure is provided on the automobile, and the exhaust structure adopts the rear-mounted commercial passenger vehicle exhaust structure as described in any one of claims 1-9.

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