CN108457777B - Air inlet box, air inlet system and vehicle - Google Patents
Air inlet box, air inlet system and vehicle Download PDFInfo
- Publication number
- CN108457777B CN108457777B CN201710087613.7A CN201710087613A CN108457777B CN 108457777 B CN108457777 B CN 108457777B CN 201710087613 A CN201710087613 A CN 201710087613A CN 108457777 B CN108457777 B CN 108457777B
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- Prior art keywords
- air inlet
- air
- hollow shell
- box
- inlet box
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- 238000000034 method Methods 0.000 abstract description 6
- 230000030279 gene silencing Effects 0.000 abstract description 3
- 230000001603 reducing effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
- F02M35/10013—Means upstream of the air filter; Connection to the ambient air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1205—Flow throttling or guiding
- F02M35/1216—Flow throttling or guiding by using a plurality of holes, slits, protrusions, perforations, ribs or the like; Surface structures; Turbulence generators
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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
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention provides an air inlet box, an air inlet system and a vehicle, wherein the air inlet box comprises a hollow shell, one side surface of the hollow shell is provided with an air inlet channel which is communicated with the outside and an inner cavity of the hollow shell, the air inlet channel is formed by a plurality of air inlet holes, the lengths and/or the inner diameters of the plurality of air inlet holes are different, the other side surface of the hollow shell is provided with an air outlet which is communicated with an air filter, and the inner cavity of the hollow shell forms a channel for air to enter from the air inlet channel and flow out from the air outlet. When noise generated in the working process of the engine propagates outwards from the air inlet box, the frequency range of sound waves filtered by the air inlet holes with different lengths and inner diameters is larger, so that the sectional area of the propagation path of the sound waves is changed to further generate the change of acoustic impedance, most of noise is transmitted back, few part of sound waves with different frequencies can be transmitted, great attenuation is caused to the noise, and a good silencing and noise reducing effect is achieved.
Description
Technical Field
The invention relates to an air inlet box, an air inlet system and a vehicle.
Background
The existing passenger car engine air inlet system comprises an air inlet box, an air outlet of the air inlet box is communicated with an air inlet of an air filter, and air enters the air filter through the air inlet box and then enters the engine through an air inlet pipeline after being filtered. For example, the Chinese patent application publication No. CN106150790A discloses an air intake device and a passenger car using the same. The air inlet device disclosed by the prior art comprises a box-shaped shell, an air inlet and an air outlet are respectively arranged on opposite side surfaces of the box-shaped shell, wherein the side surfaces where the air inlet is arranged are of a screen plate structure, the meshes of the screen plate form filter holes, a guide pipe used for being communicated with an air filter element is arranged at the air outlet position, rectifying fins formed by six guide plates and connecting rings are arranged in the guide pipe, and in addition, a shutter type water retaining structure is further arranged in the shell. When the air inlet device is used, large noise is formed and is transmitted outwards from an air inlet of the air inlet device due to opening and closing of a throttle valve, knocking in a cylinder, impact of high-speed air flow and the like in the working process of the engine, so that passengers on a vehicle carrying the engine are subjected to large noise intrusion.
Disclosure of Invention
The invention aims to provide an air inlet box capable of silencing and reducing noise; meanwhile, the invention also provides an air inlet system and a vehicle using the air inlet box.
The air inlet box comprises a hollow shell, wherein an air inlet channel which is communicated with the outside and the inner cavity of the hollow shell is arranged on one side surface of the hollow shell, the air inlet channel is formed by a plurality of air inlet holes, the lengths and/or the inner diameters of the plurality of air inlet holes are different, an air outlet which is communicated with an air filter is arranged on the other side surface of the hollow shell, and an air passing channel which is used for allowing air to enter from the air inlet channel and flow out from the air outlet is formed in the inner cavity of the hollow shell.
When noise generated in the working process of the engine propagates outwards from the air inlet box, the frequency range of sound waves filtered by the air inlet holes with different lengths and inner diameters is larger, so that the sectional area of the propagation path of the sound waves is changed to further generate the change of acoustic impedance, most of noise is transmitted back, few part of sound waves with different frequencies can be transmitted, great attenuation is caused to the noise, and a good silencing and noise reducing effect is achieved.
The side of the hollow shell is provided with a plurality of through pipes which are communicated with the outside and the inner cavity of the hollow shell, and the air inlet holes are formed by inner holes of the through pipes. The air inlet hole is formed through the inner hole of the through pipe arranged on the side surface, so that the manufacturing is simple and the processing is convenient.
The through pipes are parallel to each other and are arranged in an array mode, so that air intake is facilitated, and air intake vortex is avoided.
The hollow shell is an L-shaped shell with a horizontal section and a vertical section, the air inlet channel and the air outlet are respectively positioned at the end parts of the horizontal section and the vertical section, and air flows out from the air outlet after entering from the air inlet channel through steering. The L-shaped shell bends the propagation path of noise, and suppresses noise propagation.
The cross section of the inner cavity of the horizontal section is larger than that of the inner cavity of the vertical section, the cross section of noise on the propagation path changes, and certain acoustic impedance changes are generated, so that a part of noise is reflected back to the engine, and the purpose of noise reduction is further achieved.
The cross section of the horizontal section is rectangular, the cross section of the vertical section is circular, the shape of the inner cavity of the air passing channel is changed, the reflection of noise in the propagation process is increased, and the noise reduction effect is achieved.
The inner cavity of the horizontal section and the inner cavity of the vertical section are in smooth transition, so that air flow entering through the air inlet channel smoothly enters the filter, the probability of vortex generation is reduced, and air inlet of an engine is not influenced while noise is reduced.
The air outlet of vertical section tip department is equipped with the water conservancy diversion grid, the water conservancy diversion grid includes more than two concentric ring and connects gradually the radial fin of each concentric ring, and the water conservancy diversion grid guides the air current to follow the gas and gets into the filter on the one hand, and the cross sectional area of the gas passage that forms through the water conservancy diversion grid and the air passage of inlet box inner chamber also changes, improves the change of acoustic impedance again, optimizes the noise reduction effect.
The air inlet system comprises an air filter and an air inlet box connected to the air inlet of the air filter, wherein the air inlet box comprises a hollow shell, an air inlet channel which is communicated with the outside and the inner cavity of the hollow shell is arranged on one side surface of the hollow shell, the air inlet channel is formed by a plurality of air inlet holes, the lengths and/or the inner diameters of the plurality of air inlet holes are different, an air inlet box air outlet which is communicated with the air inlet of the air filter is arranged on the other side surface of the hollow shell, and an air passing channel which is used for allowing air to enter from the air inlet channel and flow out from the air outlet of the air inlet box is formed in the inner cavity of the hollow shell.
The side of the hollow shell is provided with a plurality of through pipes which are communicated with the outside and the inner cavity of the hollow shell, and the air inlet holes are formed by inner holes of the through pipes.
The through pipes are parallel to each other and are arranged in an array.
The hollow shell is an L-shaped shell with a horizontal section and a vertical section, the air inlet channel and the air inlet box air outlet are respectively positioned at the end parts of the horizontal section and the vertical section, and air flows out from the air inlet box air outlet through steering after entering from the air inlet channel.
The cross-sectional area of the inner cavity of the horizontal section is larger than the cross-sectional area of the inner cavity of the vertical section.
The cross section of the horizontal section is rectangular, and the cross section of the vertical section is circular.
The inner cavity of the horizontal section and the inner cavity of the vertical section are in smooth transition.
The air outlet of the end part of the vertical section is provided with a guide grid, and the guide grid comprises more than two concentric rings and radial fins which are sequentially connected with the concentric rings.
The vehicle comprises an engine air inlet system, wherein the air inlet system comprises an air filter and an air inlet box connected to an air inlet of the air filter, the air inlet box comprises a hollow shell, an air inlet channel which is communicated with the outside and an inner cavity of the hollow shell is arranged on one side surface of the hollow shell, the air inlet channel is formed by a plurality of air inlet holes, the lengths and/or the inner diameters of the plurality of air inlet holes are different, an air inlet box air outlet which is communicated with the air inlet of the air filter is arranged on the other side surface of the hollow shell, and an air passing channel which is used for allowing air to enter from the air inlet channel and flow out from the air outlet of the air inlet box is formed in the inner cavity of the hollow shell.
The side of the hollow shell is provided with a plurality of through pipes which are communicated with the outside and the inner cavity of the hollow shell, and the air inlet holes are formed by inner holes of the through pipes.
The through pipes are parallel to each other and are arranged in an array.
The hollow shell is an L-shaped shell with a horizontal section and a vertical section, the air inlet channel and the air inlet box air outlet are respectively positioned at the end parts of the horizontal section and the vertical section, and air flows out from the air inlet box air outlet through steering after entering from the air inlet channel.
The cross-sectional area of the inner cavity of the horizontal section is larger than the cross-sectional area of the inner cavity of the vertical section.
The cross section of the horizontal section is rectangular, and the cross section of the vertical section is circular.
The inner cavity of the horizontal section and the inner cavity of the vertical section are in smooth transition.
The air outlet of the end part of the vertical section is provided with a guide grid, and the guide grid comprises more than two concentric rings and radial fins which are sequentially connected with the concentric rings.
Drawings
FIG. 1 is a schematic diagram of an air intake system of the present invention;
fig. 2 is a perspective view of the air inlet box of the present invention;
FIG. 3 is a schematic view of the structure of the air inlet box of the present invention;
FIG. 4 is a schematic view of the structure of an air intake end cap;
fig. 5 is a schematic structural view of the air guide grille.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Particular embodiments of the vehicle of the present invention include an engine air intake system. As shown in fig. 1 to 5, the engine air intake system mainly comprises an air filter 1 and an air intake box 5 connected to an air intake port 10 of the air filter 1, and an air outlet of the air filter is communicated with an air intake port of the engine.
The air inlet box 5 comprises a hollow shell which is L-shaped and comprises a horizontal section 50 and a vertical section 51. The horizontal segment 50 is rectangular in cross-sectional shape, having a rectangular interior cavity; the vertical section 51 is circular in cross-sectional shape, having a circular lumen; the inner cavity of the horizontal section and the inner cavity of the vertical section are in smooth transition, and the cross-sectional area of the inner cavity of the horizontal section is larger than that of the inner cavity of the vertical section.
An air inlet end cover 56 is arranged on the front end face of the horizontal section 50 of the hollow shell, and a plurality of through pipes 55 are arranged on the air inlet end cover 56. The air inlet end cover 56 is fastened on the front end opening of the horizontal section 50 in an interference manner, the inner hole 52 of the through pipe 55 serves as an air inlet hole to communicate the inner cavity of the hollow shell with the outside, and the inner holes of the through pipes jointly form an air inlet channel of the air inlet box 5. The through pipes 55 are parallel to each other and arranged in an array, and the lengths and the inner hole diameters of the through pipes 55 are different. In order to make the front end face of the intake box horizontal section flush without interfering with the outer body member, a through pipe 55 extends inwardly from the intake end cover.
The lower end of the vertical section 51 of the hollow shell is provided with an air inlet box air outlet 53, and the air inlet box air outlet 53 is connected with an air filter air inlet. A deflector grill 54 is provided in the hollow housing at the lower port of the vertical section 51, i.e. at the outlet of the inlet box. The structure of the flow-guiding grille 54 is shown in fig. 5, and includes three concentric rings 541 and five radial fins 542 sequentially radially connecting the three concentric rings 541, the flow-guiding grille 54 divides the lower opening of the vertical section into a plurality of separate channels for the air flow in the air inlet box to pass through and enter the air filter 1, so that the air flow can be prevented from generating vortex when entering the air filter from the air inlet box, and the air can smoothly enter the air filter and supplement the air to the engine. Of course, the number of concentric rings forming the guide grid and the number of radial fins may be selected according to the size of the air outlet of the air inlet box, for example, the number of concentric rings may be two or four, the number of radial fins may be four or six, etc., which is not limited herein.
In this embodiment, in order to ensure the structural strength of the horizontal section, the outer surface of the rectangular horizontal section is further provided with reinforcing ribs disposed around the outer surface.
When the vehicle air inlet system is used, external air enters the inner cavity of the air inlet box through the inner hole of the through pipe, flows to the vertical section in a reversing way through the horizontal section, enters the air filter from the outlet of the air inlet box, and then enters the engine. The inner holes of the through pipes are used as air inlets, and the inner holes of the through pipes form an air inlet channel together, so that larger foreign matters outside can be prevented from entering the air inlet system, and a certain filtering effect is achieved. The through pipes are mutually parallel and are arranged in an array mode, so that the airflow entering the air inlet box can be guided to flow, vortex generation is avoided, and air inlet is smooth. The air inlet box is provided with the guide grating at the air outlet position, so that air flowing to the vertical section after being changed from the horizontal section can be guided and combed, and vortex is avoided when air enters the air filter. When the noise generated by the engine works and propagates outwards through the air inlet box, sound waves enter the vertical section from the air outlet of the air inlet box, pass through the horizontal section and finally pass out of the air inlet channel at the front end of the horizontal section. In the process, the areas of the channels formed by the flow guide grids, the vertical section inner cavities, the horizontal section inner cavities and the inner cavities of the air inlets formed by the plurality of through pipes are all unequal, acoustic impedance of the sound waves on the propagation path changes many times, most of noise is emitted back, the noise really transmitted by the air inlet channels is very little, especially the lengths of the plurality of through pipes and the diameters of the inner holes are different, sound waves in a very large frequency range can be filtered, the acoustic impedance of the noise in the propagation process is also enabled to change severely, and the noise reduction effect is good.
Of course, the air intake box of the vehicle of the present invention is not limited to the above-described embodiment, and in other embodiments, the hollow housing may be linear or wavy or other bent shape, and is not limited to the L-shape in the present example; the cross-sectional areas of the horizontal section and the vertical section of the hollow shell can be equal, the cross-sectional shapes can be equal, the air inlet holes can be different in length and inner diameter, or the air inlet holes can be different in inner diameter and equal in length, so that the manufacturing difficulty and the production cost can be reduced, and the noise reduction effect is damaged.
In other embodiments, during manufacturing, a plurality of parallel through holes with different diameters can be processed on a plate with a certain thickness and a curved surface with uneven two side surfaces in the thickness direction, and the through holes are arranged at the front port of the horizontal section after the processing is finished, so that the through holes form the air inlet holes of the air inlet box.
Embodiments of the air intake system of the present invention: the specific structure is the same as that of the air intake system in the above-described vehicle embodiment, and will not be described here again.
Embodiments of the air inlet box of the present invention: the specific structure is the same as that of the air inlet box in the vehicle embodiment, and will not be repeated here.
Claims (10)
1. The utility model provides an inlet box which characterized in that, includes the cavity casing, is equipped with the air inlet channel of intercommunication outside and cavity casing inner chamber on the side of cavity casing, the air inlet channel comprises a plurality of inlet ports, and the length and/or the internal diameter of a plurality of inlet ports are unequal, is equipped with the gas outlet that is used for with the air cleaner intercommunication on the other side of cavity casing, and the inner chamber of cavity casing forms the passageway that supplies the air to get into from the air inlet channel, follow the gas outlet.
2. The air inlet box according to claim 1, wherein a plurality of through pipes which are communicated with the outside and the inner cavity of the hollow shell are arranged on the side surface of the hollow shell, and the air inlet holes are formed by inner holes of the through pipes.
3. The air inlet box according to claim 2, wherein the plurality of through pipes are arranged in parallel with each other and in an array.
4. A cartridge according to claim 1, 2 or 3, wherein the hollow housing is an L-shaped housing having a horizontal section and a vertical section, the inlet and outlet ports being located at the ends of the horizontal and vertical sections respectively, and air flowing out of the outlet port after entering from the inlet port through a turn.
5. The inlet box of claim 4 wherein the cross-sectional area of the interior cavity of the horizontal section is greater than the cross-sectional area of the interior cavity of the vertical section.
6. The air intake box of claim 5, wherein the horizontal section has a rectangular cross-sectional shape and the vertical section has a circular cross-sectional shape.
7. The air inlet box of claim 6, wherein the inner cavity of the horizontal section and the inner cavity of the vertical section are smoothly transitioned.
8. The air inlet box according to claim 7, wherein a flow guide grid is arranged at an air outlet of the end part of the vertical section, and the flow guide grid comprises more than two concentric rings and radial fins connected with the concentric rings in sequence.
9. An air intake system comprising an air filter, wherein an air inlet of the air filter is fitted with an air intake box as claimed in any one of claims 1 to 8.
10. A vehicle comprising an engine air intake system comprising an air filter, wherein an air inlet of the air filter is provided with an air inlet box according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710087613.7A CN108457777B (en) | 2017-02-17 | 2017-02-17 | Air inlet box, air inlet system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710087613.7A CN108457777B (en) | 2017-02-17 | 2017-02-17 | Air inlet box, air inlet system and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108457777A CN108457777A (en) | 2018-08-28 |
| CN108457777B true CN108457777B (en) | 2023-09-29 |
Family
ID=63221595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710087613.7A Active CN108457777B (en) | 2017-02-17 | 2017-02-17 | Air inlet box, air inlet system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108457777B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339995A (en) * | 2018-10-12 | 2019-02-15 | 厦门金龙旅行车有限公司 | A kind of air inlet transfer box with decrease of noise functions |
| CN113294273B (en) * | 2021-04-23 | 2024-07-30 | 江门市大长江集团有限公司 | Motorcycle, air filter assembly and air inlet connector |
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| CN108457777A (en) | 2018-08-28 |
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