CN217327462U - Rear silencer and silencing system of vehicle - Google Patents
Rear silencer and silencing system of vehicle Download PDFInfo
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- CN217327462U CN217327462U CN202220426459.8U CN202220426459U CN217327462U CN 217327462 U CN217327462 U CN 217327462U CN 202220426459 U CN202220426459 U CN 202220426459U CN 217327462 U CN217327462 U CN 217327462U
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- muffler
- shell
- silencer
- pipe
- holes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The utility model discloses a back silencer and noise elimination system of vehicle. Wherein the rear muffler includes: a first housing; at least two rear muffler partitions arranged in the first shell and spaced apart from each other, wherein the edge of each rear muffler partition is hermetically connected to the first shell, and each rear muffler partition is provided with a plurality of first through holes; the first silencing pipe section sequentially penetrates through the front end of the first shell and the at least two rear silencer partition plates, and a plurality of second through holes are formed in the pipe wall of the first silencing pipe section; the second silencing pipe sequentially penetrates through the rear end of the first shell and the at least two rear silencer partition plates, and a plurality of third through holes are formed in the pipe wall of the second silencing pipe. Small volume and strong noise elimination performance.
Description
Technical Field
The utility model relates to an engine field especially relates to a back silencer and noise elimination system of vehicle.
Background
The working principle of the extended-range automobile is that a vehicle battery pack is charged through an internal combustion engine, and then a motor is driven by a battery to drive the vehicle. Because the internal combustion engine of the extended range electric vehicle only needs to drive the generator, the engine can be in the best working condition in most of time in a mode of calibrating the output power, and the maximum output power is ensured. In order to obtain the most efficient output power, the extended range engine has a long working time in a high-speed interval, which causes a phenomenon of high exhaust noise, and the ratio of high-frequency components in the exhaust noise is large.
In order to solve the problem of high exhaust noise in the prior art, the exhaust noise is usually counteracted in a mode of increasing the volume of a silencer, but the space is narrow due to the fact that a battery, a motor, an electric control system and the like are arranged on a chassis of the extended range type automobile, and the silencer with the large volume is difficult to arrange. In addition, the extended range electric vehicle belongs to a new energy automobile, and noise, vibration and harshness (NVH) level needs to have a noise elimination requirement on a standard pure electric vehicle.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a back silencer and noise elimination system of vehicle that small and noise elimination performance are strong.
The utility model discloses a further purpose reduces the noise elimination level of the less vehicle in bottom space.
Particularly, the utility model provides a rear muffler of vehicle includes:
a first housing;
at least two rear muffler partitions arranged in the first shell and spaced apart from each other, wherein the edge of each rear muffler partition is hermetically connected to the first shell, and each rear muffler partition is provided with a plurality of first through holes;
the first silencing pipe section sequentially penetrates through the front end of the first shell and the at least two rear silencer partition plates, and a plurality of second through holes are formed in the pipe wall of the first silencing pipe section;
the second silencing pipe sequentially penetrates through the rear end of the first shell and the at least two rear silencer partition plates, and a plurality of third through holes are formed in the pipe wall of the second silencing pipe.
Further, the number of the second through holes is greater than the number of the third through holes, and the rear muffler further includes:
and the third silencing pipe is arranged in the first shell, sequentially penetrates through the at least two rear silencer clapboards and is communicated with the cavity at the front end and the rear end of the first shell.
Furthermore, a plurality of fourth through holes are formed in the pipe wall of the third sound-absorbing pipe.
Further, a gap is formed between two ends of the third sound-absorbing tube and two ends of the first shell, so that the third sound-absorbing tube is communicated with the cavity at the front end and the cavity at the rear end of the first shell.
Further, the number of the rear muffler partitions is three.
Further, the plurality of first through holes on each of the rear muffler partitions are arranged in an array.
Particularly, the utility model also discloses a noise elimination system, include back silencer.
Further, still include the pre-muffler that communicates with the back muffler through first muffler pipe, first muffler pipe includes first noise elimination pipeline section and second noise elimination pipeline section, the pre-muffler includes:
a second housing;
the second sound attenuation pipe section is arranged in the second shell;
the front silencer baffle plates are arranged in the second shell and are arranged at intervals, the edge of each front silencer baffle plate is connected to the second shell in a sealing mode, and other front silencer baffle plates except the front silencer baffle plate closest to the rear end of the second shell in the at least two front silencer baffle plates are provided with a plurality of through holes.
Further, a plurality of through holes are formed in the second sound attenuation pipe section between the front muffler partition and the front end or the rear end of the second housing.
Further, the first muffler pipe penetrates the second housing.
In one or more embodiments of the present invention, the airflow in the rear muffler is guided by the first and second muffling pipes, the airflow flow path in the rear muffler is greatly increased, and the low-frequency noise energy can be resolved; the through holes formed in the partition plate of the rear silencer can also reduce exhaust back pressure and give consideration to the dynamic property of the engine.
The utility model discloses in one or more embodiments, through communicateing fore-silencer and back silencer as a noise elimination system, this noise elimination system's adoption split type overall arrangement, the fore-silencer combines to emphasize respectively with the back silencer and handles different frequency sound waves to whole noise elimination system overall arrangement is more nimble, more is suitable for the not enough motorcycle type in bottom space and uses.
In one or more embodiments of the present invention, the airflow sequentially passes through the plurality of cavities in the front muffler, and high frequencies are eliminated in the cavity located at the end of the first housing, and intermediate frequencies are eliminated in other cavities in the front muffler; the front silencer is provided with a partition plate with an opening, and the airflow reaches an adjacent cavity through the opening on the partition plate to eliminate low frequency; the airflow is refracted and reflected in the rear silencer so as to reduce the noise level, and the section is suddenly changed through the opening on the partition plate, so that the noise is reduced through the acoustic impedance change caused by the sudden change; the utility model provides a noise reduction of centering high frequency noise can be realized to one or more embodiments.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic perspective view of a rear muffler according to one or more embodiments of the present invention.
Fig. 2 is a schematic perspective view of a sound abatement system according to one or more embodiments of the present invention;
FIG. 3 is a schematic perspective view of a pre-muffler of the muffling system of FIG. 2;
in the figure:
1-a pre-silencer;
101-a first muffling cavity of the pre-muffler;
102-a second muffling cavity of the pre-muffler;
103-third silencing cavity of the pre-silencer;
2-rear muffler;
201-a first muffling cavity of the rear muffler;
202-a second muffling cavity of the rear muffler;
203-third silencing cavity of rear silencer;
204-a fourth sound-deadening cavity of the rear muffler;
3-a first muffler pipe;
31-the inlet end of the first muffler pipe;
32-the exhaust end of the first muffler pipe;
4-a second muffler pipe;
5-a pre-muffler partition;
51-a pre-muffler first baffle;
52-a second partition of the pre-muffler;
6-rear muffler partition;
61-a rear muffler first baffle;
62-a second partition of the rear muffler;
63-third partition of rear muffler;
7-third muffler pipe.
Detailed Description
Fig. 1 is a schematic perspective view of a rear muffler according to one or more embodiments of the present invention. In particular, the present invention discloses a rear muffler 2 of a vehicle, which may generally include a first housing, a first muffling pipe segment, a second muffling pipe 4 and at least two rear muffler partitions 6, wherein the at least two rear muffler partitions 6 are disposed in the first housing and spaced apart from each other, an edge of each rear muffler partition 6 is hermetically connected to the first housing, and each rear muffler partition 6 has a plurality of first through holes; the first silencing pipe section penetrates through the front end of the first shell and the at least two rear silencer partition plates 6 in sequence, and a plurality of second through holes are formed in the pipe wall of the first silencing pipe section; and the second silencing pipe 4 sequentially penetrates through the rear end of the first shell and the at least two rear silencer partition plates 6, and a plurality of third through holes are formed in the pipe wall of the second silencing pipe.
In one or more embodiments of the present invention, the airflow in the rear muffler is guided by the first and second muffling pipes, the airflow flow path in the rear muffler is greatly increased, and the low-frequency noise energy can be resolved; the through holes formed in the rear silencer partition plate 6 can also reduce exhaust back pressure and give consideration to the dynamic property of the engine.
According to the utility model discloses an embodiment, back silencer baffle 6 includes first baffle 61 of back silencer, back silencer second baffle 62 and back silencer third baffle 63, and first noise elimination pipeline section is a part of first noise elimination pipe 3, thereby first noise elimination pipe 3 end passes foretell first casing front end, the first baffle 61 of back silencer, back silencer second baffle 62 and reachs back silencer fourth noise elimination cavity 204, and the first noise elimination pipe 3 of this section is first noise elimination pipeline section. The first shell is cylindrical, and the outer edges of the first partition board 61, the second partition board 62 and the third partition board 63 of the rear silencer are connected to the inner wall of the first shell so as to divide the space in the shell into a plurality of silencing cavities.
Specifically, among the multiple cavities, the cavity located between the front end of the first shell and the first partition 61 of the rear muffler is a first sound-deadening cavity 201 of the rear muffler, the cavity located between the first partition 61 of the rear muffler and the second partition 62 of the rear muffler is a second sound-deadening cavity 202 of the rear muffler, the cavity located between the second partition 62 of the rear muffler and the third partition 63 of the rear muffler is a third sound-deadening cavity 203 of the rear muffler, and the cavity located between the third partition 63 of the rear muffler and the rear end of the first shell is a fourth sound-deadening cavity 204 of the rear muffler. It is understood that the rear muffler first sound-deadening cavity 201 is a sound-deadening cavity at the front end of the first housing, and the rear muffler fourth sound-deadening cavity 204 is a cavity at the rear end of the first housing. The first partition board 61, the second partition board 62 and the third partition board 63 of the rear muffler are all provided with a plurality of first through holes to communicate with adjacent cavities, so that the exchange and flow of air flow are realized. According to yet another embodiment of the present invention, the number of partitions in the first housing may also be 4, 5, 6, etc. in a number greater than 3, thereby partitioning the first housing into more.
According to the utility model discloses an embodiment, the inlet end intercommunication of second muffler pipe 4 is located the first noise elimination cavity 201 of back silencer, and the exhaust end of second muffler pipe 4 passes the rear end that is located back silencer second noise elimination cavity 202, back silencer third noise elimination cavity 203, back silencer fourth noise elimination cavity 204 and first casing, and the end is open to outside exhaust flow.
According to an embodiment of the present invention, the muffler further comprises a third muffler pipe 7, and the third muffler pipe 7 is disposed in the rear muffler 2 for gas exchange. Specifically, the rear muffler fourth sound-deadening cavity 204 is communicated with the rear muffler first sound-deadening cavity 201 through the third sound-deadening pipe 7. It is understood that the third sound-deadening pipe 7 needs to pass through the third partition 63, the second partition 62 and the first partition 61 of the rear muffler in the present embodiment, and in yet another embodiment, the third sound-deadening pipe 7 may also pass through the first shell to directly communicate the fourth sound-deadening cavity 204 and the first sound-deadening cavity 201 of the rear muffler.
The first, second and third muffling pipes 3, 4 and 7 are provided to increase the air flow path, so as to consume the energy of the sound waves as much as possible, thereby attenuating the low-frequency sound waves. Here, in the acoustic wave range audible to the human ear, low-frequency acoustic waves, intermediate-frequency acoustic waves, and high-frequency acoustic waves are divided, and low-frequency acoustic waves are set at 200Hz (inclusive), intermediate-frequency acoustic waves are set at 200Hz to 800Hz, and high-frequency acoustic waves are set at 800Hz (inclusive).
According to the utility model discloses an embodiment, the through-hole has all been seted up with gas exchange to the pipeline section of first muffler pipe 3, second muffler pipe 4 and third muffler pipe 7 in back silencer second muffling cavity 202, the third muffling cavity 203 of back silencer, and the trompil quantity on the first muffler pipe section is greater than second muffler pipe 4 and third muffling pipe 7 to adapt to the great characteristics of gas flow in the first muffling pipe 3. Specifically, the pipe wall of the first muffling pipe section of the first muffling pipe 3 is provided with a plurality of second through holes, the pipe wall of the second muffling pipe 4 is provided with a plurality of third through holes, and the pipe wall of the third muffling pipe 7 is provided with a plurality of fourth through holes.
In one or more embodiments of the present invention, there is a gap between the two ends of the third muffling pipe 7 and the two ends of the first housing, so that the third muffling pipe 7 connects the front and rear cavities of the first housing, and the airflow enters the rear muffler fourth muffling cavity 204 through the first muffling pipe 3, then enters the rear muffler first muffling cavity 201 through the third muffling pipe 7, and then is discharged through the second muffling pipe 4; the airflow in the silencer is guided by the three silencing pipes and rotates in the silencer, so that the airflow stroke is increased, and the low-frequency noise energy can be eliminated; in addition, a plurality of first through holes are formed in the first partition plate 61, the second partition plate 62 and the third partition plate 63 of the rear silencer, exhaust back pressure can be reduced, and engine dynamic performance is considered.
Fig. 2 is a schematic perspective view of a sound damping system according to one or more embodiments of the present invention. Particularly, the utility model also discloses a noise elimination system, can include the back silencer that any one above-mentioned embodiment or several embodiments combine generally; the silencer can also comprise a front silencer communicated with the rear silencer through a first silencing pipe, wherein the first silencing pipe comprises a first silencing pipe section and a second silencing pipe section; the pre-silencer comprises a second shell, a second silencing pipe section and a pre-silencer partition plate 5, wherein the second silencing pipe section is arranged in the second shell; the front silencer baffles 5 are at least two and are arranged in the second shell in a spaced mode, the edge of each front silencer baffle 5 is connected to the second shell in a sealing mode, and the other front silencer baffles 5 except the front silencer baffle 5 closest to the rear end of the second shell in the at least two front silencer baffles 5 are provided with a plurality of through holes.
The utility model discloses an in one or more embodiments, through communicateing fore-silencer and back silencer as a noise elimination system, this noise elimination system's adoption split type overall arrangement, the fore-silencer combines to emphasize respectively with the back silencer and handles different frequency sound waves to whole noise elimination system overall arrangement is more nimble, more is suitable for the not enough motorcycle type in bottom space and uses. Specifically, the front muffler 1 and the rear muffler 2 each include a cavity for consuming high-frequency sound wave energy, and the rear muffler 2 has a larger volume than the front muffler 1, thereby serving as a low-frequency damping cavity for consuming low-frequency sound wave energy.
Fig. 3 is a schematic perspective view of the pre-muffler 1 of the sound muffling system shown in fig. 1. According to an embodiment of the present invention, the front muffler 1 comprises a second housing, a first partition 51 and a second partition 52, the second housing is cylindrical, the first partition 51 and the second partition 52 are disposed in the second housing at intervals, the first partition 51 and the second partition 52 are adapted to the inner wall of the second housing, and the first partition 51 and the second partition 52 are parallel to each other, so that the first partition 51 and the second partition 52 separate the front muffler 1 into three chambers, which are respectively a first muffling chamber 101, a second muffling chamber 102 and a third muffling chamber 103 along the front-back direction, and the first muffling pipe 3 passes through the second housing along the central axis from the inlet end 31 to the outlet end 32 of the first muffling pipe, The first partition board 51 and the second partition board 52 of the front silencer are arranged in the front silencer, so that the first silencing pipe 3 simultaneously and sequentially penetrates through the first silencing cavity 101, the second silencing cavity 102 and the third silencing cavity 103 of the front silencer.
According to an embodiment of the present invention, a sound-absorbing material such as sound-absorbing cotton, polyester fiber or foam glass is placed in the third sound-absorbing cavity 103 of the pre-muffler to fully absorb high-frequency sound waves; the first muffling pipe 3 positioned in the first muffling cavity 101 and the third muffling cavity 103 of the front muffler is provided with holes for diffusing airflow, so that sound waves are promoted to be transmitted along an air medium and further transmitted in the first muffling cavity 101 and the third muffling cavity 103 of the front muffler. Specifically, the first muffling pipe 3 is provided with a plurality of through holes arranged in a row along the periphery of the pipe section, and the through holes are used for air exchange, so that the air flow can be in the exchange process. Regarding the specific number of holes, a person skilled in the art can select the number according to the actual situation, and the specific number is not specifically described in the present embodiment. According to yet another embodiment of the present invention, the number of baffles in the first housing may also be 3, 4, 5, etc. in number greater than 3.
Specifically, the first sound-deadening cavity 101 of the pre-muffler is a sound-deadening cavity located at the front end of the pre-muffler 1, the first sound-deadening cavity 101 of the pre-muffler and the adjacent sound-deadening cavity are the second sound-deadening cavity 102 of the pre-muffler, and the third sound-deadening cavity 103 of the pre-muffler is a sound-deadening cavity located at the rear end of the pre-muffler 1 in this embodiment, so that a through hole is formed in a partition plate between the first sound-deadening cavity 101 of the pre-muffler and the second sound-deadening cavity 102 of the pre-muffler, and when air passes through the through hole, the spatial cross-sectional area through which the air passes is rapidly enlarged, so that the sound wave can realize resonance in the second cavity, and further can eliminate specific noise frequency; the partition between the third muffling cavity 103 of the pre-muffler and the second muffling cavity 102 of the pre-muffler is sealed.
Particularly, the utility model also discloses an increase form vehicle, including the noise elimination system that above-mentioned arbitrary one noise elimination system, or the combination of several above-mentioned embodiments obtained.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A rear muffler for a vehicle, comprising:
a first housing;
at least two rear muffler partitions arranged in the first shell and spaced apart from each other, wherein the edge of each rear muffler partition is hermetically connected to the first shell, and each rear muffler partition is provided with a plurality of first through holes;
the first silencing pipe section sequentially penetrates through the front end of the first shell and the at least two rear silencer partition plates, and a plurality of second through holes are formed in the pipe wall of the first silencing pipe section;
the second silencing pipe sequentially penetrates through the rear end of the first shell and the at least two rear silencer partition plates, and a plurality of third through holes are formed in the pipe wall of the second silencing pipe.
2. The rear muffler according to claim 1, wherein the number of the second through holes is greater than the number of the third through holes, the rear muffler further comprising:
and the third silencing pipe is arranged in the first shell, sequentially penetrates through the at least two rear silencer clapboards and is communicated with the cavity at the front end and the rear end of the first shell.
3. The rear muffler of claim 2, wherein the third muffler pipe has a plurality of fourth through holes in a pipe wall thereof.
4. The rear muffler according to claim 3, wherein a gap is provided between both ends of the third muffler pipe and both ends of the first shell so that the third muffler pipe communicates with the cavities of the front and rear ends of the first shell.
5. The rear muffler according to any one of claims 1 to 4, wherein the number of rear muffler partitions is three.
6. The rear muffler according to any one of claims 1 to 4, wherein the plurality of first through holes on each of the rear muffler partitions are arranged in an array.
7. A sound damping system comprising a rear muffler as claimed in any one of claims 1 to 6.
8. The muffling system of claim 7, further comprising a pre-muffler in communication with the post-muffler through a first muffling tube, the first muffling tube comprising a first muffling tube segment and a second muffling tube segment, the pre-muffler comprising:
a second housing;
the second sound attenuation pipe section is arranged in the second shell;
the front silencer baffle plates are arranged in the second shell and are arranged at intervals, the edge of each front silencer baffle plate is connected to the second shell in a sealing mode, and other front silencer baffle plates except the front silencer baffle plate closest to the rear end of the second shell in the at least two front silencer baffle plates are provided with a plurality of through holes.
9. The sound attenuation system of claim 8, wherein the second sound attenuation tube segment between the pre-muffler baffle and the front or rear end of the second housing has a plurality of through holes therein.
10. The sound damping system of claim 8 or 9, wherein the first sound damping tube extends through the second housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220426459.8U CN217327462U (en) | 2022-03-01 | 2022-03-01 | Rear silencer and silencing system of vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220426459.8U CN217327462U (en) | 2022-03-01 | 2022-03-01 | Rear silencer and silencing system of vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217327462U true CN217327462U (en) | 2022-08-30 |
Family
ID=82999116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220426459.8U Active CN217327462U (en) | 2022-03-01 | 2022-03-01 | Rear silencer and silencing system of vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217327462U (en) |
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2022
- 2022-03-01 CN CN202220426459.8U patent/CN217327462U/en active Active
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