Post-processing device and vehicle

Abstract

According to the post-processing device and the vehicle, the interference part is arranged in the air inlet cavity formed by the shell assembly and the DOC carrier assembly located in the shell assembly, so that after vibration airflow generated by pressure pulses generated by periodic opening and closing of an engine exhaust valve enters the air inlet cavity through the air inlet pipe, the airflow will make the interference part vibrate, and then the interference part vibrates; the vibration sound waves generated by the interference piece can be interfered and counteracted with the vibration sound waves generated by the air inlet pipe, so that the noise energy can be weakened, the low-frequency resonance area of the whole post-processing device is reduced, and the noise is reduced.

Description

Technical Field

[0001] This application relates to the technical field of vehicle accessories, and in particular, to a post-treatment device and a vehicle. Background Art

[0002] At present, the performance requirements for newly developed post-treatment products are becoming increasingly stringent, and higher requirements are also put forward for emission noise.

[0003] Exhaust noise is the main noise source of an automobile, and it is usually 10 - 15 dB(A) higher than other noises. Exhaust noise is mainly generated by the pressure pulse generated by the periodic opening and closing of the engine exhaust valve, which excites the airflow vibration. Utility Model Content

[0004] The purpose of this application is to provide a post-treatment device and a vehicle, which can weaken the noise energy, thereby reducing the low-frequency resonance region of the entire post-treatment device and reducing the noise.

[0005] The embodiments of this application can be implemented as follows:

[0006] In a first aspect, the present utility model provides a post-treatment device, including:

[0007] A housing assembly;

[0008] A DOC carrier assembly fixed in the internal space of the housing assembly, an intake cavity is formed between the DOC carrier assembly and a side wall of the housing assembly;

[0009] An intake pipe, at least part of which is located in the intake cavity;

[0010] An interference member, located in the intake cavity, capable of vibrating under the action of the airflow introduced by the intake pipe, and the vibration sound wave generated by the interference member can interfere and cancel with at least part of the vibration sound wave generated by the intake pipe.

[0011] In an optional embodiment, the housing assembly includes an outer housing and an intake end cap assembly connected to one end of the outer housing, the interference member includes a connecting rod and a plurality of interference sheets connected to the connecting rod, both ends of the connecting rod are fixedly connected to the inner wall of the outer housing, and the interference sheets are spaced apart along the length direction of the connecting rod.

[0012] In an optional embodiment, both ends of the connecting rod respectively have a first connecting portion, the first connecting portion includes a first connecting surface, the area size of the first connecting surface is larger than the cross-sectional size of the connecting rod, and the first connecting surface is connected to the inner wall of the outer housing.

[0013] In an alternative embodiment, one end of the interference sheet has a second connecting portion, the second connecting portion includes a second connecting surface, the area size of the second connecting surface is larger than the cross-sectional size of the interference sheet, and the second connecting surface is connected to the connecting rod.

[0014] In an alternative embodiment, the interference member is located between the intake pipe and the DOC carrier assembly, the length direction of the connecting rod is the same as the length direction of the portion of the intake pipe located in the intake cavity, and the thickness direction of the connecting rod is perpendicular to the length direction of the outer housing.

[0015] In an alternative embodiment, the length direction of the interference sheet is perpendicular to the length direction of the outer housing, the width direction of the interference sheet is the same as the length direction of the outer housing, the first connecting portion extends along the length direction of the outer housing, and the second connecting portion at one end of the interference sheet extends along the length direction of the connecting rod. The second connecting portion extends along the length direction of the connecting rod.

[0016] In an alternative embodiment, there are a plurality of the interference sheets on both sides of the connecting rod, and along the length direction of the connecting rod, the interference sheets on both sides are staggered.

[0017] In an alternative embodiment, the end of the intake pipe located in the intake cavity is fixedly connected to the inner wall of the outer housing, and the portion of the intake pipe located in the intake cavity has a porous area, the porous area.

[0018] In an alternative embodiment, the housing assembly further includes an outlet end cap assembly, the outlet end cap assembly is connected to the other end of the outer housing, and an outlet cavity is formed between the DOC carrier assembly and the outlet end cap assembly;

[0019] The aftertreatment device further includes an outlet tail pipe, and the outlet tail pipe passes through the outlet end cap assembly and extends into the outlet cavity.

[0020] In a second aspect, the present invention provides a vehicle, including the aftertreatment device according to any one of the foregoing embodiments.

[0021] Compared with the prior art, the beneficial effects of the embodiments of the present application include, for example:

[0022] By arranging an interference member in the intake cavity formed by the housing assembly and the DOC carrier therein, after the vibration airflow generated by the pressure pulse generated by the periodic opening and closing of the engine exhaust valve enters the intake cavity through the intake pipe, the airflow will cause the interference member to vibrate. Since the vibration sound wave generated by the interference member can interfere and cancel the vibration sound wave generated by the intake pipe, the noise energy can be weakened, thereby reducing the low-frequency resonance region of the entire aftertreatment device and reducing the noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic diagram of the post-processing device in an embodiment of the present application;

[0025] Figure 2 is Figure 1 a schematic diagram of the internal structure of;

[0026] Figure 3 is Figure 1 one of the schematic diagrams of the partial structure of;

[0027] Figure 4 is Figure 1 another schematic diagram of the partial structure of;

[0028] Figure 5 is Figure 1 a schematic diagram of the intake end cap assembly in;

[0029] Figure 6 is Figure 1 a schematic diagram of the exhaust end cap assembly in;

[0030] Figure 7 is Figure 3 a schematic diagram of the interference member in;

[0031] Reference numerals: 10 - outer housing; 11 - intake mounting hole; 20 - intake end cap assembly; 21 - intake end cap; 22 - first perforated plate; 23 - first fixing bracket; 30 - intake pipe; 31 - perforated area; 40 - DOC carrier assembly; 50 - interference member; 51 - connecting rod; 510 - first connecting portion; 52 - interference sheet; 520 - second connecting portion; 60 - exhaust end cap assembly; 61 - exhaust end cap; 610 - first mounting hole; 62 - second perforated plate; 620 - second mounting hole; 63 - second fixing bracket; 70 - exhaust tail pipe; 71 - perforated pipe structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some, but not all, of the embodiments of this application. Components of the embodiments of this application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application claimed, but merely represents selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts shall fall within the scope of protection of this application.

[0034] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the products of this application are usually placed during use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0037] In the description of this application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0038] The following will describe in detail some embodiments of the present application with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0039] An embodiment of the present application discloses a post-treatment device, which is mainly used to be installed on a vehicle and connected in series with the exhaust passage of an engine on the vehicle to purify the exhaust gas.

[0040] Referring to Figures 1 to 4 , the post-treatment device includes a housing assembly, an intake pipe 30, a DOC carrier assembly 40, and an outlet tail pipe 70. The housing assembly includes an outer housing 10, an intake end cover assembly 20, and an outlet end cover assembly 60.

[0041] The outer housing 10 has a hollow structure, which can be a substantially hollow rectangular structure with both ends open in the length direction as shown in the figure, or can also be a substantially hollow cylindrical structure with both ends open, as long as it can accommodate the DOC carrier assembly 40, the intake end cover assembly 20, the intake pipe 30, the outlet end cover assembly 60, and the outlet tail pipe 70 for installation.

[0042] The intake end cover assembly 20 and the outlet end cover assembly 60 are respectively connected to both ends of the outer housing 10 in the length direction, that is, the intake end cover assembly 20 is connected to one end of the outer housing 10 in the length direction, and the outlet end cover assembly 60 is connected to the other end of the outer housing 10 in the length direction.

[0043] The DOC carrier assembly 40 is fixed in the internal space of the outer housing 10. Accordingly, an intake cavity is formed between the intake end cover assembly 20 and the DOC carrier assembly 40, that is, an intake cavity is formed between the DOC carrier assembly 40 and a side wall of the housing assembly, and an outlet cavity is formed between the outlet end cover assembly 60 and the DOC carrier assembly 40;

[0044] The intake pipe 30 is at least partially located in the intake cavity of the outer housing 10 to be able to connect with the external engine exhaust pipe, so as to introduce the exhaust gas into the intake cavity, so that the exhaust gas passes through the DOC carrier assembly 40 for treatment and purification.

[0045] The outlet tail pipe 70 passes through the outlet end cover assembly 60 and extends into the outlet cavity, so that the gas purified by the DOC carrier assembly 40 is discharged through the outlet cavity and the outlet tail pipe 70.

[0046] In this embodiment, the post-treatment device further includes an interference member 50, which is located in the intake cavity and can vibrate under the action of the airflow introduced by the intake pipe 30, and the vibration sound waves generated by the interference member 50 can interfere and cancel out with at least part of the vibration sound waves generated by the intake pipe 30.

[0047] In this way, by arranging an interference member 50 in the intake air cavity between the intake end cover assembly 20 and the DOC carrier assembly 40, after the vibration airflow generated by the pressure pulse caused by the periodic opening and closing of the engine exhaust valve enters the intake air cavity through the intake pipe 30, the airflow will cause the interference member to vibrate. Since the vibration sound wave generated by the interference member can interfere and cancel out the vibration sound wave generated by the intake pipe 30, the noise energy can be weakened, thereby reducing the low-frequency resonance region of the entire post-treatment device and reducing the noise.

[0048] More specifically, in this embodiment, the side wall of the outer housing 10 is provided with a through intake installation hole 11, and the intake pipe 30 is passed through and sealingly fitted in the intake installation hole 11. In this way, one end of the intake pipe 30 is located inside the intake air cavity, and the other end is located outside the outer housing 10 for the exhaust gas to pass through. Of course, in some embodiments, the intake pipe 30 can also be entirely located inside the intake air cavity, and the other end is connected to the intake installation hole 11, and then connecting to an external exhaust gas pipe is also feasible.

[0049] The end of the intake pipe 30 located inside the intake air cavity is fixedly connected to the inner wall of the outer housing 10. The part of the intake pipe 30 located inside the intake air cavity has a porous area 31. In this way, after the vibration airflow enters the intake pipe 30, it can enter the intake air cavity through the porous area 31. Since the end of the ventilation pipe is fixedly connected to the inner wall of the outer housing 10, the vibration phenomenon of the intake pipe 30 can be slowed down, further reducing the noise. At the same time, the porous area 31 can play a role in absorbing and buffering the noise energy, so that the low-frequency resonance region of the entire post-treatment device can be further reduced and the noise can be reduced.

[0050] The connection method between the end of the intake pipe 30 located inside the intake air cavity and the inner wall of the outer housing 10 is not specifically limited and can be welding to reduce the vibration of the outer housing 10 and further reduce the generation of noise.

[0051] The porous area 31 on the intake pipe 30 is distributed in an arc-shaped curved surface around the central axis of the intake pipe 30. The shape of the radial cross-section of the arc-shaped curved surface is a major arc. Therefore, the central angle of the distribution of the porous area 31 on the intake pipe 30 is greater than 180°, and the edge part of the porous area 31 faces the DOC carrier assembly 40; that is, most of the porous area 31 is close to the intake end cover assembly 20, and a small part is close to the DOC carrier assembly 40. The gas in the intake pipe 30 mainly enters the intake air cavity from the area facing the intake end cover assembly 20, reducing the noise energy. Moreover, this can reduce the gas pressure loss and enable the gas to enter the DOC carrier assembly 40 evenly for purification treatment, avoiding affecting the back pressure of the post-treatment device itself and the uniformity of exhaust gas treatment.

[0052] In other embodiments, the intake pipe 30 can also be elliptical, cylindrical, etc., and the porous area 31 is arranged on the outer peripheral wall of the intake pipe 30.

[0053] Combined with Figure 5 , the intake end cap assembly 20 includes an intake end cap 21 and a first perforated plate 22; the intake end cap 21 is connected to one end of the outer housing 10, and the middle area of the intake end cap 21 is recessed outward relative to the DOC carrier assembly 40, that is, the middle area of the intake end cap 21 is recessed in a direction away from the DOC carrier assembly 40; the first perforated plate 22 is connected to the side of the edge area of the intake end cap 21 facing the DOC carrier assembly 40. In this way, one end of the outer housing 10 is closed by the intake end cap 21, and an intake cavity is formed between the intake end cap 21 and the DOC carrier assembly 40. At the same time, the first perforated plate 22 is provided to absorb noise energy and further reduce the generation of noise.

[0054] Among them, the intake end cap assembly 20 further includes at least one first fixing bracket 23 connected between the middle area of the intake end cap 21 and the middle area of the first perforated plate 22. For example, it can be the four first fixing brackets 23 shown in the figure. In this way, the connection reliability between the intake end cap 21 and the first perforated plate 22 can be improved, and the first perforated plate 22 can be prevented from vibrating.

[0055] Combined with Figure 6 , the exhaust end cap assembly 60 includes an exhaust end cap 61 and a second perforated plate 62; the exhaust end cap 61 is connected to the other end of the outer housing 10, and the middle area of the exhaust end cap 61 is recessed outward relative to the DOC carrier assembly 40, that is, the middle area of the intake and exhaust end cap 61 is recessed in a direction away from the DOC carrier assembly 40; the second perforated plate 62 is connected to the side of the edge area of the exhaust end cap 61 facing the inside of the outer housing 10; the exhaust tail pipe 70 passes through the exhaust end cap 61 and the second perforated plate 62 to extend into the exhaust cavity to ensure that the processed gas can be normally discharged from the exhaust tail pipe 70. In this way, the other end of the outer housing 10 is closed by the exhaust end cap 61, and an exhaust cavity is formed between the exhaust end cap 61 and the DOC carrier assembly 40. At the same time, the second perforated plate 62 is provided to absorb the noise energy transmitted to the rear end and further reduce the generation of noise.

[0056] Among them, the exhaust end cap assembly 60 further includes at least one second fixing bracket 63 connected between the middle area of the exhaust end cap 61 and the middle area of the second perforated plate 62. For example, it can be the three second fixing brackets 63 shown in the figure. In this way, the connection reliability between the exhaust end cap 61 and the first perforated plate 22 can be improved, and the second perforated plate 62 can be prevented from vibrating.

[0057] Of course, for the convenience of the exhaust tail pipe 70 passing through the exhaust end cover 61 and the second perforated plate 62, the exhaust end cover 61 is provided with a first mounting hole 610, and correspondingly, the second perforated plate 62 is provided with a second mounting hole 620. The first mounting hole 610 and the second mounting hole 620 are coaxially arranged, and the exhaust tail pipe 70 is passed through the first mounting hole 610 and the second mounting hole 620 and sealed. For example, the connection and sealing can be achieved by welding, or can also be sealed by an O-ring.

[0058] It should also be noted that the part of the exhaust tail pipe 70 located inside the outer housing 10 is a porous pipe structure 71, that is, a plurality of openings are formed in the part of the exhaust tail pipe 70 located in the exhaust cavity, so as to facilitate the smooth flow of the air flow, reduce the overall back pressure of the post-treatment device, and also reduce the generation of noise.

[0059] The interference member 50 is located between the intake end cover assembly 20 and the DOC carrier assembly 40, so as to leave a distance between the intake pipe 30 and the intake end cover 21 inside the outer housing 10, so that a part of the air flow discharged from the porous area 31 of the intake pipe 30 can reach the first perforated plate 22 without obstruction to absorb the noise energy.

[0060] Combined Figure 7 , the interference member 50 includes a connecting rod 51 and a plurality of interference sheets 52 connected to the connecting rod 51. Both ends of the connecting rod 51 are fixedly connected to the inner wall of the outer housing 10, and the interference sheets 52 are spaced apart along the length direction of the connecting rod 51. In this way, the fixing of each interference sheet 52 inside the outer housing 10 is realized through the connecting rod 51. When the vibrating air flow passes through the interference member 50, the interference sheets 52 can be vibrated, so as to at least partially interfere and cancel the energy of the vibration sound waves generated by the interference sheets 52 and the vibration sound waves generated by the intake pipe 30, achieving the effect of noise reduction.

[0061] Both ends of the connecting rod 51 respectively have a first connecting portion 510. The first connecting portion 510 includes a first connecting surface, and the area size of the first connecting surface is larger than the cross-sectional size of the connecting rod 51. The first connecting surface is fixedly connected to the inner wall of the outer housing 10, so as to realize the connection between the first connecting portion 510 and the inner wall of the outer housing 10. For example, welding, clamping, screwing and other methods can be adopted to ensure the sealing of the outer housing 10 to prevent air leakage, thereby increasing the connection area between the connecting rod 51 and the outer housing 10 and improving the connection reliability between the two.

[0062] Among them, the first connecting portion 510 extends along the length direction of the outer housing 10. The first connecting portion 510 can be formed by bending a structural member, that is, the first connecting portion 510 and the connecting rod 51 are of an integral structure, which is convenient for manufacturing and has high strength. Of course, the first connecting portion 510 can also be fixedly connected to the end of the connecting rod 51 by welding or other methods.

[0063] One end of the interference sheet 52 has a second connecting portion 520. The second connecting portion 520 includes a second connecting surface, and the area size of the second connecting surface is larger than the cross-sectional size of the interference sheet 52. The second connecting surface is connected to the connecting rod 51, so as to realize the connection between the second connecting portion 520 and the connecting rod 51. For example, the connection methods include screw connection, welding, snap connection, etc., thereby increasing the connection area between the interference sheet 52 and the connecting rod 51 and improving the connection reliability between the two.

[0064] Wherein, the second connecting portion 520 extends along the length direction of the connecting rod 51. The second connecting portion 520 can be formed by bending a structural member, that is, the second connecting portion 520 and the interference sheet 52 are of an integral structure, which is convenient for manufacturing and has high strength. Of course, the second connecting portion 520 can also be fixedly connected to the end of the interference sheet 52 by means of welding or the like.

[0065] The length direction of the connecting rod 51 is the same as the length direction of the part of the intake pipe 30 located in the intake cavity, so that each interference sheet 52 can better contact the vibrating air flow and ensure the interference silencing effect.

[0066] The length direction of the interference sheet 52 is perpendicular to the length direction of the outer shell 10, the width direction of the interference sheet 52 is the same as the length direction of the outer shell 10, and the thickness direction of the connecting rod 51 is perpendicular to the length direction of the outer shell 10, so as to reduce the blockage of the air flow and reduce the overall back pressure of the post-treatment device.

[0067] There are a plurality of interference sheets 52 on both sides of the connecting rod 51, and along the length direction of the connecting rod 51, the interference sheets 52 on both sides are staggered, so as to be able to contact the air flow more evenly and ensure that the air flow can enter the DOC carrier assembly 40 evenly.

[0068] In addition, the embodiment of the present application also discloses a vehicle, which includes the post-treatment device of the above embodiment.

[0069] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A post-processing device, characterized in that: include: Shell assembly; A DOC carrier assembly (40) fixed in the internal space of the housing assembly, wherein an air intake cavity is formed between the DOC carrier assembly (40) and a side wall of the housing assembly; An air intake pipe (30), at least partly located in the air intake cavity; The interference member (50) is located in the air intake cavity and can vibrate under the action of the airflow introduced by the air intake pipe (30), and the vibration sound waves generated by the interference member (50) can interfere with and offset the vibration sound waves generated by at least part of the air intake pipe (30).

2. The post-processing device according to claim 1, characterized in that: The shell assembly comprises an outer shell (10) and an air intake end cover assembly (20) connected to one end of the outer shell (10); the interference member (50) comprises a connecting rod (51) and a plurality of interference plates (52) connected to the connecting rod (51); both ends of the connecting rod (51) are fixedly connected to the inner wall of the outer shell (10); and the interference plates (52) are spaced apart along the length direction of the connecting rod (51).

3. The post-processing device according to claim 2, characterized in that: The connecting rod (51) has a first connecting portion (510) at each end. The first connecting portion (510) includes a first connecting surface. The area of ​​the first connecting surface is larger than the cross-sectional size of the connecting rod (51). The first connecting surface is connected to the inner wall of the outer shell (10).

4. The post-processing device according to claim 3, characterized in that: One end of the interference piece (52) has a second connecting portion (520), the second connecting portion (520) includes a second connecting surface, the area size of the second connecting surface is larger than the cross-sectional size of the interference piece (52), and the second connecting surface is connected to the connecting rod (51).

5. The post-processing device according to claim 3 or 4, characterized in that: The interference member (50) is located between the air intake pipe (30) and the DOC carrier assembly (40), the length direction of the connecting rod (51) is the same as the length direction of the portion of the air intake pipe (30) located in the air intake cavity, and the thickness direction of the connecting rod (51) is perpendicular to the length direction of the outer shell (10).

6. The post-processing device according to claim 5, characterized in that: The length direction of the interference piece (52) is perpendicular to the length direction of the outer shell (10), the width direction of the interference piece (52) is the same as the length direction of the outer shell (10), and the first connecting portion (510) extends along the length direction of the outer shell (10).

7. The post-processing device according to claim 6, characterized in that: A plurality of interference pieces (52) are provided on both sides of the connecting rod (51), and along the length direction of the connecting rod (51), the interference pieces (52) on both sides are distributed in a staggered manner.

8. The post-processing device according to any one of claims 2 to 4, characterized in that: The air intake pipe (30) is located at the end of the air intake cavity and is fixedly connected to the inner wall of the outer shell (10). The portion of the air intake pipe (30) located at the air intake cavity has a porous area (31). The porous area (31) is provided.

9. The post-processing device according to claim 8, characterized in that: The housing assembly further comprises an air outlet cover assembly (60), wherein the air outlet cover assembly (60) is connected to the other end of the outer housing (10), and an air outlet cavity is formed between the DOC carrier assembly (40) and the air outlet cover assembly (60); The post-processing device further comprises an exhaust tail pipe (70), wherein the exhaust tail pipe (70) passes through the exhaust end cover assembly (60) and extends into the exhaust cavity.

10. A vehicle, characterized in that: The invention comprises the post-processing device according to any one of claims 1 to 9.

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