CN211174412U - Air inlet pipeline and engine air inlet system comprising same - Google Patents
Air inlet pipeline and engine air inlet system comprising same Download PDFInfo
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- CN211174412U CN211174412U CN201922038657.8U CN201922038657U CN211174412U CN 211174412 U CN211174412 U CN 211174412U CN 201922038657 U CN201922038657 U CN 201922038657U CN 211174412 U CN211174412 U CN 211174412U
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- 238000004891 communication Methods 0.000 claims abstract description 10
- 239000012530 fluid Substances 0.000 claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims description 17
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
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Abstract
An intake duct and an engine intake system including the same, the intake duct including an intermediate pipe having a pipe wall defining an air flow passage, a first duct cover and a second duct cover covering the pipe wall, a resonator formed including a resonator side wall disposed around an outer peripheral surface of the pipe wall, the outer peripheral surface of the pipe wall, the resonant cavity side wall, the first pipeline cover and the second pipeline cover enclose at least one resonant cavity, the resonant cavity side wall defines at least one air inlet face corresponding to the at least one resonant cavity respectively on the outer peripheral face of the pipe wall, a through hole is formed in each air inlet face in the at least one air inlet face, the through holes achieve fluid communication between the at least one resonant cavity and the air flow channel, a gap exists between the second pipeline cover and the resonant cavity side wall, and the second pipeline cover is provided with side structures which are staggered correspondingly to the resonant cavity side wall and are in contact with each other so as to shield the gap. The air inlet pipeline can seal each resonant cavity under the condition that a certain gap is kept between the second pipeline cover and the side wall of the resonant cavity, and the sealing performance is improved.
Description
Technical Field
The application relates to the field of automobile engines, in particular to an air inlet pipeline and an engine air inlet system comprising the same.
Background
An intake system of an engine for introducing air into cylinders of the engine generally includes an air cleaner for cleaning air and an intake duct. To reduce intake noise transmitted from the interior of the engine to the external environment, a resonator or resonator is typically provided in the middle of the intake duct in fluid communication with the intake duct for reducing intake noise.
At present, when manufacturing an air inlet duct with a resonator, two duct caps are generally fixed by using an infrared welding or vibration friction welding process so as to form a plurality of resonant cavities in cooperation with an inner intermediate duct. However, when welding is performed by an infrared welding process, there is a problem that the sealing property between the two duct caps is insufficient, so that the air intake duct is easily leaked. In order to improve the product quality, people choose to adopt a vibration friction welding process to weld the pipeline cover. However, when the vibration friction welding is used, the side wall of the middle pipe and the pipe cover need to be kept at a certain distance to prevent the side wall and the pipe cover from colliding in the welding process, but the cavity of each resonant cavity cannot be sealed, and therefore the sealing performance between the resonant cavities after welding cannot be guaranteed.
Disclosure of Invention
In view of the above, it is necessary to provide an air inlet duct having a side structure for solving the problem that a seal cannot be formed between the resonator cavities during vibration friction welding.
According to the utility model discloses an aspect provides an air inlet pipe, include:
a middle tube comprising a tube wall having a first outer side and a second outer side, the tube wall defining an air flow passage located inside the middle tube;
a first duct cover overlying a first outer side of the duct wall; and
a second duct cover overlying a second exterior side of the duct wall,
the middle pipe, the first pipeline cover and the second pipeline cover form a resonator, the resonator comprises a resonant cavity side wall arranged around the outer peripheral surface of the pipe wall, the resonant cavity side wall, the first pipeline cover and the second pipeline cover enclose at least one resonant cavity, the resonant cavity side wall defines at least one air inlet surface corresponding to the at least one resonant cavity respectively on the outer peripheral surface of the pipe wall, each air inlet surface of the at least one air inlet surface is provided with a through hole, the through holes realize fluid communication between the at least one resonant cavity and the air flow channel, and in addition, the through holes realize fluid communication between the at least one resonant cavity and the air flow channel
And a gap is formed between the second pipeline cover and the side wall of the resonant cavity, and the second pipeline cover is provided with a side structure which is staggered in the axial direction corresponding to the side wall of the resonant cavity and is in contact with the side wall of the resonant cavity so as to shield the gap.
In one embodiment, the side structure is a protrusion provided around an inner wall of the second conduit cover, the protrusion being in corresponding axial contact with the resonator cavity side wall to shield the gap.
In one embodiment, the first pipe cover is fixedly mounted on a first outer side of the pipe wall, such that an inner wall of the first pipe cover is in close fit with the resonant cavity side wall to seal the at least one resonant cavity.
In one embodiment, the second conduit cap is joined to the first conduit cap by vibrational friction welding.
In one embodiment, the pipe wall is integrally injection molded with the resonator side wall, and the second pipe cover is integrally injection molded with the side structure.
In one embodiment, the first pipe cover is fixedly mounted on the first outer side surface of the pipe wall through a limiting groove.
In one embodiment, in the manufacturing process of the air inlet duct, the first duct cover is fixed on the first outer side surface of the duct wall through a position limiting groove, and the second duct cover and the first duct cover are welded together through vibration friction welding to form the air inlet duct.
In one embodiment, the resonator comprises a plurality of resonant cavities having different volumes, the resonant cavities being separated from each other by the resonant cavity side walls and the side structures and each being in fluid communication with the air flow passage by the through hole provided in the corresponding air intake face.
In one embodiment, when the gas inlet duct is arranged in a curved manner, adjacent resonator sidewalls of two adjacent ones of the plurality of resonators are parallel to each other, and correspondingly adjacent ones of the side structures are also parallel to each other.
In one embodiment, the through-hole is circular.
According to another aspect of the present invention, there is also provided an engine air intake system, comprising any one of the air intake ducts described above.
Above-mentioned inlet duct sets up the side structure through the inner wall at the second pipeline lid for when using vibration friction welding technology to weld first pipeline lid and second pipeline lid, even with keeping certain clearance in order to prevent collision between the resonant cavity lateral wall on second pipeline lid and the middle pipe, also can seal into solitary cavity with each resonant cavity of pipeline inside, thereby improve the leakproofness between the resonant cavity.
Drawings
Fig. 1 is a schematic view of an air intake duct of the present invention, wherein (a) is a perspective view of the air intake duct of the present invention, and (b) is a sectional view of the air intake duct on the side of a second duct cover along the a-a section line;
fig. 2 is an enlarged view of a resonator portion in (b) of fig. 1;
fig. 3 is a schematic sectional view of the intake duct in fig. 1 (a) in a horizontal direction at the resonator portion.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
As shown in fig. 1 to 3, an intake duct according to an embodiment of the present invention includes a middle pipe 30, a first duct cap 10, a second duct cap 20, and a resonator 40 is formed between the first duct cap 10, the second duct cap 20, and the middle pipe 30. The intermediate tube 30 includes a tube wall 310 having a first outer side and a second outer side, the tube wall 310 defining an air flow passage 50 located inside the intermediate tube 30. The first duct cap 10 is overlaid on a first outer side of the duct wall 310, and the second duct cap 20 is overlaid on a second outer side of the duct wall 310. Resonator sidewalls 420 of resonator 40 are disposed around the outer circumferential surface of tube wall 310, and the outer circumferential surface of tube wall 310, resonator sidewalls 420, first duct cap 10, and second duct cap 20 enclose at least one resonator 410, for example, three resonator cavities 410 in the present embodiment, of resonator 40, as shown in fig. 1. The outer circumferential surface of the tube wall 310 is divided by the resonator sidewall 420 into three air inlet surfaces respectively corresponding to the three resonators 410, each air inlet surface is provided with a through hole 320, and the through holes 320 realize fluid communication between the corresponding resonator 410 and the air flow passage 50.
There is a gap between the second pipe cap 20 and the resonance chamber side wall 420, the inner wall of the second pipe cap 20 is provided with at least one side structure 210, and the side structure 210 is a protrusion provided around the inner wall of the second pipe cap 20, the protrusion being axially staggered corresponding to the resonance chamber side wall 420 and contacting each other to block the gap, thereby sealing the resonance chamber 410 into a single chamber. For example, as shown in fig. 2 and 3, two side structures 210 are provided in the present embodiment, the two side structures 210 axially contacting the corresponding two resonator sidewalls 420, respectively, to separate and seal the three resonator cavities 410 from each other into separate cavities, so that the sealability between the resonator cavities 410 can be ensured even in the case where the second duct cap 20 is kept at a certain clearance from the resonator sidewalls 420 in order to weld the first duct cap 10 and the second duct cap 20 together using the vibration friction welding process to prevent collision.
In the manufacturing process, the pipe wall 310 and the cavity sidewall 420 are integrally injection molded, the second pipe cap 20 and the protrusion are integrally injection molded, and then the first pipe cap 10 is fixed on the first outer side surface of the pipe wall 310 through, for example, a retaining groove, so that the inner wall of the first pipe cap 10 is closely attached to the cavity sidewall 420 to seal the cavity 410. It will be understood by those skilled in the art that the first pipe cap 10 may be mounted on the first outer side of the pipe wall 310 in other ways as long as the first pipe cap 10 can form the sealed resonant cavity 410 with the resonant cavity side wall 420. Then, the second pipe cap 20 and the first pipe cap 10 are welded together by vibration friction welding, so that the inner wall of the second pipe cap 20 maintains a certain gap with the two resonator sidewalls 420, and the two resonator sidewalls 420 axially contact with the two protrusions to block the gap, thereby sealing the resonator 410, whereby the sealability between the resonator 410 after welding can be improved.
As shown in fig. 1 and 2, the resonator 40 of the intake duct includes three resonant cavities 410, the three resonant cavities 410 being separated from each other by the resonant cavity side walls 420 being in axial contact with the projection as the side structure 210, and each being in fluid communication with each other through the through-hole 320 and the air flow passage 50 opened in the corresponding intake face. The three resonant cavities 410 have different volumes and thus different natural frequencies, and are capable of resonating three frequencies of noise and thereby attenuating the noise. It will be understood by those skilled in the art that although the present embodiment employs an arrangement including three resonant cavities 410, the arrangement of the resonant cavities 410 is not limited thereto, and only one resonant cavity 410 may be included, or two or more than three resonant cavities 410 may be included, according to actual requirements.
When the air inlet duct is disposed in a curved manner, the adjacent cavity sidewalls 420 of two adjacent cavities 410 of the plurality of cavities 410 are parallel to each other, and correspondingly, the adjacent protrusions are also parallel to each other, and the cavities 410 are in fluid communication with the air flow passage 50 through the through holes 320 formed on the corresponding air inlet surfaces, thereby achieving the purpose of reducing noise.
In the present embodiment, the shape of the through-hole 320 on the air intake surface is circular. It will be understood by those skilled in the art that the shape of the through-hole 320 is not limited thereto, and the through-hole 320 may be any suitable circular-like or quadrangular-like shape. The size and number of the through holes 320 are not particularly limited, and may be adjusted according to a desired sound attenuation frequency.
Further, in an embodiment of the engine intake system to which the above-described intake duct is applied, the engine intake system (not shown) includes a filter, a cylinder, and an intake duct. The air inlet of the air inlet pipeline is communicated with the air outlet of the filter, the air outlet of the air inlet pipeline is communicated with the air inlet of the combustion chamber in the engine cylinder, fresh air enters the filter from the air inlet of the filter, flows into the air inlet pipeline from the air outlet of the filter after being filtered, and flows to the air inlet of the combustion chamber in the engine cylinder after being silenced by the air inlet pipeline.
According to the utility model discloses an embodiment, above-mentioned admission line sets up the side structure through the inner wall at the second pipeline lid for when using vibration friction welding technology to weld first pipeline lid and second pipeline lid, even with keeping certain clearance in order to prevent colliding with the design between the resonant cavity lateral wall on second pipeline lid and the intervalve, also can seal into solitary cavity with each resonant cavity of pipeline inside, thereby improve the leakproofness between the resonant cavity.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. An air intake duct, comprising:
a middle tube comprising a tube wall having a first outer side and a second outer side, the tube wall defining an air flow passage located inside the middle tube;
a first duct cover overlying a first outer side of the duct wall; and
a second duct cover overlying a second exterior side of the duct wall,
wherein the middle tube, the first duct cover and the second duct cover form a resonator, the resonator includes a resonant cavity side wall disposed around an outer peripheral surface of the tube wall, the resonant cavity side wall, the first duct cover and the second duct cover enclose at least one resonant cavity, the resonant cavity side wall defines at least one air intake surface on the outer peripheral surface of the tube wall, the at least one air intake surface respectively corresponding to the at least one resonant cavity, each air intake surface of the at least one air intake surface is provided with a through hole, the through holes realize fluid communication between the at least one resonant cavity and the air flow channel, and,
and a gap is formed between the second pipeline cover and the side wall of the resonant cavity, and the second pipeline cover is provided with a side structure which is staggered in the axial direction corresponding to the side wall of the resonant cavity and is in contact with the side wall of the resonant cavity so as to shield the gap.
2. The intake duct of claim 1, wherein the side structure is a protrusion provided around an inner wall of the second duct cover, the protrusion being in corresponding axial contact with the resonator side wall to block the gap.
3. The intake duct of claim 2, wherein the first duct cover is fixedly mounted on a first outer side of the duct wall such that an inner wall of the first duct cover closely conforms to the resonant cavity side wall to seal the at least one resonant cavity.
4. The intake duct of claim 1, wherein the second duct cover is joined to the first duct cover by vibration friction welding.
5. The intake duct of claim 4, wherein the duct wall is integrally injection molded with the resonator cavity side wall and the second duct cover is integrally injection molded with the side structure.
6. The air intake duct of claim 5, wherein the first duct cover is fixedly mounted in position on the first outer side of the duct wall by a retaining groove.
7. The air intake duct of claim 6, wherein the resonator comprises a plurality of resonator cavities of different volumes, the plurality of resonator cavities being separated from each other by the resonator cavity side walls and the side structures and each being in fluid communication with the air flow passage by the through-hole provided in the corresponding air intake face.
8. The intake duct of claim 6, wherein when the intake duct is arranged in a curved configuration, adjacent resonator sidewalls of two adjacent ones of the plurality of resonators are parallel to each other, and correspondingly adjacent ones of the side structures are also parallel to each other.
9. The air intake duct of claim 7, wherein the through-hole is circular.
10. An engine air intake system, characterized in that it comprises an air intake conduit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922038657.8U CN211174412U (en) | 2019-11-22 | 2019-11-22 | Air inlet pipeline and engine air inlet system comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922038657.8U CN211174412U (en) | 2019-11-22 | 2019-11-22 | Air inlet pipeline and engine air inlet system comprising same |
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| Publication Number | Publication Date |
|---|---|
| CN211174412U true CN211174412U (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922038657.8U Active CN211174412U (en) | 2019-11-22 | 2019-11-22 | Air inlet pipeline and engine air inlet system comprising same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958435A (en) * | 2021-11-16 | 2022-01-21 | 安徽江淮汽车集团股份有限公司 | Vehicle air intake system |
-
2019
- 2019-11-22 CN CN201922038657.8U patent/CN211174412U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958435A (en) * | 2021-11-16 | 2022-01-21 | 安徽江淮汽车集团股份有限公司 | Vehicle air intake system |
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