JP7376525B2 - Internal combustion engine intake duct - Google Patents

Internal combustion engine intake duct Download PDF

Info

Publication number
JP7376525B2
JP7376525B2 JP2021046611A JP2021046611A JP7376525B2 JP 7376525 B2 JP7376525 B2 JP 7376525B2 JP 2021046611 A JP2021046611 A JP 2021046611A JP 2021046611 A JP2021046611 A JP 2021046611A JP 7376525 B2 JP7376525 B2 JP 7376525B2
Authority
JP
Japan
Prior art keywords
peripheral wall
intake duct
internal combustion
holes
combustion engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2021046611A
Other languages
Japanese (ja)
Other versions
JP2022145271A (en
Inventor
正盛 廣瀬
剛士 谷口
千夏 守谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyoda Iron Works Co Ltd
Original Assignee
Toyoda Iron Works Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyoda Iron Works Co Ltd filed Critical Toyoda Iron Works Co Ltd
Priority to JP2021046611A priority Critical patent/JP7376525B2/en
Priority to PCT/JP2022/002384 priority patent/WO2022196100A1/en
Publication of JP2022145271A publication Critical patent/JP2022145271A/en
Application granted granted Critical
Publication of JP7376525B2 publication Critical patent/JP7376525B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • 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

Description

本発明は、内燃機関の吸気ダクトに関する。 The present invention relates to an intake duct for an internal combustion engine.

特許文献１には、ディフューザ部を有する吸気管が開示されている。ディフューザ部は、ディフューザ部の始点から下流側ほど拡径している。吸気管において上記ディフューザ部よりも上流側には、吸気口に続く前方部分が設けられている。 Patent Document 1 discloses an intake pipe having a diffuser section. The diameter of the diffuser section increases toward the downstream side from the starting point of the diffuser section. A front portion continuing to the intake port is provided upstream of the diffuser portion in the intake pipe.

こうした吸気管によれば、ディフューザ部よりも上流側の絞り部によって、吸気管内に発生する騒音が外部へ発散することが抑制される。 According to such an intake pipe, the noise generated in the intake pipe is suppressed from dispersing to the outside by the constriction part located upstream of the diffuser part.

特開２００２－１０６４３０号公報Japanese Patent Application Publication No. 2002-106430

ところで、近年、内燃機関の吸気ダクトにおいては、吸気騒音の更なる低減が求められている。 Incidentally, in recent years, there has been a demand for further reduction of intake noise in intake ducts of internal combustion engines.

上記課題を解決するための内燃機関の吸気ダクトは、吸気が流通する筒状の周壁を備える。前記周壁の流路断面積は、前記周壁の延在方向の中間部から両端部に向かって徐々に大きくなっており、前記中間部は、前記周壁の内部と、前記周壁の外部であって且つ前記吸気ダクトの外部とを連通する多数の孔を有しており、多数の前記孔は、前記周壁の周方向に互いに間隔をおいて設けられている。 An intake duct for an internal combustion engine for solving the above problem includes a cylindrical peripheral wall through which intake air flows. The flow passage cross-sectional area of the peripheral wall gradually increases from an intermediate portion in the extending direction of the peripheral wall toward both ends, and the intermediate portion includes an inside of the peripheral wall and an outside of the peripheral wall, and It has a large number of holes that communicate with the outside of the intake duct, and the large number of holes are provided at intervals from each other in the circumferential direction of the peripheral wall.

内燃機関の吸気ダクトの一実施形態を示す断面図。FIG. 1 is a sectional view showing an embodiment of an intake duct of an internal combustion engine. 同実施形態の吸気ダクトを示す斜視図。FIG. 3 is a perspective view showing the intake duct of the same embodiment. 図１の３－３線に沿った断面図。A sectional view taken along line 3-3 in FIG. 1. 変形例の吸気ダクトの一部を拡大して示す側面図。The side view which expands and shows a part of intake duct of a modification. 図４の５－５線に沿った断面図。FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. 4. 他の変形例の吸気ダクトを示す拡大断面図。FIG. 7 is an enlarged sectional view showing an intake duct of another modification. 他の変形例の吸気ダクトを示す拡大断面図。FIG. 7 is an enlarged sectional view showing an intake duct of another modification.

以下、図１～図３を参照して、内燃機関の吸気ダクトの一実施形態について説明する。
図１～図３に示すように、内燃機関の吸気ダクトは、吸気が流通する筒状の周壁１０を備える。 Hereinafter, one embodiment of an intake duct for an internal combustion engine will be described with reference to FIGS. 1 to 3.
As shown in FIGS. 1 to 3, an intake duct of an internal combustion engine includes a cylindrical peripheral wall 10 through which intake air flows.

図１及び図２に示すように、周壁１０は、第１端部１１、周壁１０の延在方向、すなわち吸気ダクトの軸線方向において第１端部１１とは反対側に位置する第２端部１２、及び周壁１０の延在方向において第１端部１１と第２端部１２との中間に位置する中間部１３を有している。例えば第１端部１１が、吸気ダクトの上流側端部であり、第２端部１２が吸気ダクトの下流側端部である。周壁１０は、直線状の軸線を有している。なお、周壁１０は、直線状の軸線を有するものに限定されず、曲線状の軸線を有するものであってもよい。 As shown in FIGS. 1 and 2, the peripheral wall 10 includes a first end 11 and a second end located on the opposite side to the first end 11 in the extending direction of the peripheral wall 10, that is, in the axial direction of the intake duct. 12, and an intermediate portion 13 located midway between the first end portion 11 and the second end portion 12 in the extending direction of the peripheral wall 10. For example, the first end 11 is the upstream end of the intake duct, and the second end 12 is the downstream end of the intake duct. The peripheral wall 10 has a linear axis. Note that the peripheral wall 10 is not limited to having a linear axis, but may have a curved axis.

図１に示すように、周壁１０の流路断面積は、中間部１３から両端部１１，１２に向かって徐々に大きくなっている。
周壁１０の外径は、周壁１０の延在方向の全体にわたって同一である。周壁１０の内径は、周壁１０の延在方向の中間部１３から両端部１１，１２に向かって徐々に大きくなっている。すなわち、周壁１０の板厚は、中間部１３から両端部１１，１２に向かって徐々に小さくなっている。したがって、中間部１３は、周壁１０の延在方向において中間部１３に近くなるほど周壁１０の板厚、すなわち質量が大きくなる。 As shown in FIG. 1, the flow passage cross-sectional area of the peripheral wall 10 gradually increases from the intermediate portion 13 toward both end portions 11 and 12.
The outer diameter of the peripheral wall 10 is the same throughout the extending direction of the peripheral wall 10. The inner diameter of the peripheral wall 10 gradually increases from the intermediate portion 13 toward both ends 11 and 12 in the extending direction of the peripheral wall 10. That is, the thickness of the peripheral wall 10 gradually decreases from the intermediate portion 13 toward both end portions 11 and 12. Therefore, as the intermediate portion 13 approaches the intermediate portion 13 in the extending direction of the peripheral wall 10, the thickness of the peripheral wall 10, that is, the mass thereof increases.

図１～図３に示すように、中間部１３は、周壁１０の内部と、周壁１０の外部であって且つ吸気ダクトの外部とを連通する多数の孔１４を有している。
多数の孔１４は、周壁１０の周方向及び延在方向の双方に互いに間隔をおいて設けられている。多数の孔１４は、同一の形状及び同一の大きさを有している。孔１４は、例えば円孔である。 As shown in FIGS. 1 to 3, the intermediate portion 13 has a large number of holes 14 that communicate the inside of the peripheral wall 10 with the outside of the peripheral wall 10 and the outside of the intake duct.
A large number of holes 14 are provided at intervals in both the circumferential direction and the extending direction of the peripheral wall 10. A large number of holes 14 have the same shape and size. The hole 14 is, for example, a circular hole.

多数の孔１４は、周壁１０の周方向において等間隔にて設けられている。多数孔１４は、周壁１０の延在方向において等間隔にて設けられている。
図３に示すように、孔１４の内径は、孔１４の軸線方向全体にわたって同一である。孔１４の内径は、０．５ｍｍ～５ｍｍであることが好ましく、１ｍｍ～３ｍｍであることが更に好ましい。多数の孔１４は、周壁１０の中心から放射状に延びている。 A large number of holes 14 are provided at equal intervals in the circumferential direction of the peripheral wall 10. The multiple holes 14 are provided at equal intervals in the extending direction of the peripheral wall 10.
As shown in FIG. 3, the inner diameter of the hole 14 is the same throughout the axial direction of the hole 14. The inner diameter of the hole 14 is preferably 0.5 mm to 5 mm, more preferably 1 mm to 3 mm. A large number of holes 14 extend radially from the center of the peripheral wall 10.

図１～図３に示すように、周壁１０は、周壁１０を周方向に分割して構成する第１分割体２０及び第２分割体３０を有している。
図２及び図３に示すように、第１分割体２０は、半割円筒状の周壁部２１と、周壁部２１の周方向の両端に設けられた一対のフランジ部２２とを有している。 As shown in FIGS. 1 to 3, the peripheral wall 10 has a first divided body 20 and a second divided body 30, which are formed by dividing the peripheral wall 10 in the circumferential direction.
As shown in FIGS. 2 and 3, the first divided body 20 has a half-cylindrical peripheral wall portion 21 and a pair of flange portions 22 provided at both ends of the peripheral wall portion 21 in the circumferential direction. .

フランジ部２２は、周壁部２１から外周側に向かって突出している。
図２に示すように、フランジ部２２は、周壁１０の延在方向の全体にわたって設けられている。 The flange portion 22 protrudes from the peripheral wall portion 21 toward the outer circumferential side.
As shown in FIG. 2, the flange portion 22 is provided over the entire length of the peripheral wall 10 in the extending direction.

図２及び図３に示すように、第２分割体３０は、半割円筒状の周壁部３１と、周壁部３１の周方向の両端に設けられた一対のフランジ部３２とを有している。周壁部３１及びフランジ部３２は、第１分割体２０の周壁部２１及びフランジ部３２と同様な形状及び大きさである。 As shown in FIGS. 2 and 3, the second divided body 30 has a half-cylindrical peripheral wall portion 31 and a pair of flange portions 32 provided at both ends of the peripheral wall portion 31 in the circumferential direction. . The peripheral wall portion 31 and the flange portion 32 have the same shape and size as the peripheral wall portion 21 and the flange portion 32 of the first divided body 20 .

第１分割体２０及び第２分割体３０は、共に硬質樹脂成形体により構成されている。
一対のフランジ部２２と一対のフランジ部３２とを互いに接合することにより、周壁１０が形成されている。 The first divided body 20 and the second divided body 30 are both made of hard resin molded bodies.
The peripheral wall 10 is formed by joining the pair of flange parts 22 and the pair of flange parts 32 to each other.

次に、本実施形態の作用について説明する。
周壁１０の流路断面積は、中間部１３に向かって徐々に小さくなる。このため、周壁１０の内面と吸気との間に摩擦抵抗が発生しやすくなる。これにより、吸気音のエネルギが摩擦熱に変換されやすくなることで、吸気音のエネルギが低減されるようになる（以上、作用１）。 Next, the operation of this embodiment will be explained.
The flow passage cross-sectional area of the peripheral wall 10 gradually decreases toward the intermediate portion 13. Therefore, frictional resistance tends to occur between the inner surface of the peripheral wall 10 and the intake air. As a result, the energy of the intake noise is easily converted into frictional heat, thereby reducing the energy of the intake noise (effect 1).

また、吸気の圧力は、流路断面積が他の部分よりも小さい中間部１３において高められるようになる。こうして圧力が高められた吸気の一部が、中間部１３に設けられた多数の孔１４を通じて吸気ダクトの外部に逃がされる。このとき、孔１４の内面と吸気との間に摩擦抵抗が発生する。これにより、吸気音のエネルギが摩擦熱に変換されることで、吸気音のエネルギが低減されるようになる（以上、作用２）。 In addition, the pressure of the intake air is increased in the intermediate portion 13 where the cross-sectional area of the flow path is smaller than that in other portions. A portion of the intake air whose pressure has been increased in this manner is released to the outside of the intake duct through a number of holes 14 provided in the intermediate portion 13. At this time, frictional resistance occurs between the inner surface of the hole 14 and the intake air. As a result, the energy of the intake noise is converted into frictional heat, thereby reducing the energy of the intake noise (effect 2).

次に、本実施形態の効果について説明する。
（１）周壁１０の流路断面積は、周壁１０の延在方向の中間部１３から両端部１１，１２に向かって徐々に大きくなっている。中間部１３は、周壁１０の内部と、周壁１０の外部であって且つ吸気ダクトの外部とを連通する多数の孔１４を有している。 Next, the effects of this embodiment will be explained.
(1) The flow passage cross-sectional area of the peripheral wall 10 gradually increases from the intermediate portion 13 toward both ends 11 and 12 in the extending direction of the peripheral wall 10. The intermediate portion 13 has a large number of holes 14 that communicate the inside of the peripheral wall 10 with the outside of the peripheral wall 10 and the outside of the intake duct.

こうした構成によれば、上記作用１及び作用２を奏するため、吸気騒音を低減することができる。
（２）多数の孔１４は、周壁１０の周方向及び延在方向の双方に互いに間隔をおいて設けられている。 According to such a configuration, the above effects 1 and 2 are achieved, so that intake noise can be reduced.
(2) The large number of holes 14 are provided at intervals in both the circumferential direction and the extending direction of the peripheral wall 10.

こうした構成によれば、より多くの孔１４を中間部１３に設けることができる。これにより、より多くの吸気音のエネルギが摩擦熱に変換されることで、吸気音のエネルギが一層低減されるようになる。したがって、吸気騒音を一層低減することができる。 According to such a configuration, more holes 14 can be provided in the intermediate portion 13. As a result, more of the energy of the intake noise is converted into frictional heat, thereby further reducing the energy of the intake noise. Therefore, intake noise can be further reduced.

（３）周壁１０の板厚は、中間部１３から両端部１１，１２に向かって徐々に小さくなっている。
吸気ダクトにおいては、吸気の圧力が高い部位ほど、周壁１０が加振されやすい。このため、周壁１０の加振に起因した吸気騒音が発生しやすい。 (3) The thickness of the peripheral wall 10 gradually decreases from the intermediate portion 13 toward both end portions 11 and 12.
In the intake duct, the peripheral wall 10 is more likely to be vibrated in a region where the pressure of intake air is higher. Therefore, intake noise due to the vibration of the peripheral wall 10 is likely to occur.

この点、上記構成によれば、周壁１０の延在方向において中間部１３に近くなるほど周壁１０の板厚、すなわち質量が大きくなる。これにより、中間部１３が加振されることを抑制できるため、周壁１０の加振に起因した吸気騒音を低減することができる。 In this regard, according to the above configuration, the thickness, that is, the mass of the peripheral wall 10 increases as it approaches the intermediate portion 13 in the extending direction of the peripheral wall 10. As a result, it is possible to suppress vibration of the intermediate portion 13, so that intake noise caused by vibration of the peripheral wall 10 can be reduced.

＜変更例＞
上記実施形態は、例えば以下のように変更して実施することもできる。本実施形態及び以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。 <Example of change>
The above embodiment can also be modified and implemented, for example, as follows. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

・周壁１０の板厚を、周壁１０の延在方向の全体にわたって同一にすることもできる。この場合、周壁１０の外径を、周壁１０の内径と同様、周壁１０の延在方向の中間部１３から両端部１１，１２に向かって徐々に大きくすればよい。 - The thickness of the peripheral wall 10 can be made the same throughout the extending direction of the peripheral wall 10. In this case, the outer diameter of the peripheral wall 10 may be gradually increased from the intermediate portion 13 toward both ends 11 and 12 in the extending direction of the peripheral wall 10, similarly to the inner diameter of the peripheral wall 10.

・上記実施形態では、多数の孔１４を、周壁１０の周方向の全体にわたって互いに間隔をおいて設けるようにした。また、多数の孔１４が周壁１０の中心から放射状に延びる構成について例示した。 - In the above embodiment, a large number of holes 14 are provided at intervals over the entire circumferential direction of the peripheral wall 10. Further, a configuration in which a large number of holes 14 extend radially from the center of the peripheral wall 10 has been illustrated.

これに代えて、図４及び図５に示すように、第１分割体２０のみに多数の孔１４を設けるようにしてもよい。この場合、多数の孔１４が、互いに同一の方向に沿って延在する構成を採用することもできる。図５に示すように、多数の孔１４は、第１分割体２０と第２分割体３０との接合面に直交する方向（同図の上下方向）に沿って延在している。 Alternatively, as shown in FIGS. 4 and 5, a large number of holes 14 may be provided only in the first divided body 20. In this case, a configuration may be adopted in which a large number of holes 14 extend in the same direction. As shown in FIG. 5, the large number of holes 14 extend along a direction perpendicular to the joining surface of the first divided body 20 and the second divided body 30 (vertical direction in the figure).

この場合、周壁部２１及びフランジ部２２を成形する一対の成形型によって多数の孔１４を成形することができるため、第１分割体２０を成形する成形型の構成を簡単にすることができる。したがって、第１分割体２０を容易に成形することができる。 In this case, since a large number of holes 14 can be formed by a pair of molds for molding the peripheral wall portion 21 and the flange portion 22, the configuration of the mold for molding the first divided body 20 can be simplified. Therefore, the first divided body 20 can be easily molded.

・周壁１０は、３つ以上の分割体によって周方向に分割して構成されるものであってもよい。
・周壁１０は、周方向に分割して構成されていないものであってもよい。 - The peripheral wall 10 may be divided into three or more divided bodies in the circumferential direction.
- The peripheral wall 10 may not be configured to be divided in the circumferential direction.

・上記実施形態では、孔１４の内径が孔１４の軸線方向全体にわたって同一である構成について例示した。これに代えて、孔１４が、周壁１０の内部から孔１４を通じて吸気ダクトの外部に空気が流れる際に渦流の発生を促進する形状を有するものであってもよい。この場合、周壁１０の内部から孔１４を通じて吸気ダクトの外部に吸気が流れる際に渦流が発生しやすくなる。渦流の発生に伴って吸気音のエネルギが低減されるため、吸気騒音を一層低減できる。 - In the above embodiment, a configuration in which the inner diameter of the hole 14 is the same throughout the axial direction of the hole 14 is exemplified. Alternatively, the holes 14 may have a shape that promotes the generation of swirl when air flows from the inside of the peripheral wall 10 to the outside of the intake duct through the holes 14. In this case, when the intake air flows from the inside of the peripheral wall 10 to the outside of the intake duct through the holes 14, vortices are likely to occur. Since the energy of the intake sound is reduced with the generation of the vortex, the intake noise can be further reduced.

上記渦流の発生を促進する形状としては、図６に示すように、孔１４の内径が、周壁１０の内側から外側に向かって徐々に小さくなる構成を採用することができる。また、図７に示すように、孔１４の内径が、周壁１０の内側から外側に向かって徐々に大きくなる構成を採用することもできる。 As a shape that promotes the generation of the vortex flow, as shown in FIG. 6, the inner diameter of the hole 14 may gradually become smaller from the inside to the outside of the peripheral wall 10. Alternatively, as shown in FIG. 7, a configuration may be adopted in which the inner diameter of the hole 14 gradually increases from the inside to the outside of the peripheral wall 10.

このように、孔１４の内径、すなわち孔１４の流路断面積を、周壁１０の内側から外側に向けて徐々に変化させることによって、渦流の発生を促進する形状を容易に実現することができる。 In this way, by gradually changing the inner diameter of the hole 14, that is, the flow path cross-sectional area of the hole 14 from the inside to the outside of the peripheral wall 10, it is possible to easily realize a shape that promotes the generation of vortex flow. .

・渦流の発生を促進する他の形状としては、孔１４の内面に設けられた微少な突起などが挙げられる。
・多数の孔１４は、周壁１０の周方向のみに互いに間隔をおいて設けられるものであってもよい。また、多数の孔１４は、周壁１０の延在方向のみに互いに間隔をおいて設けられるものであってもよい。 - Other shapes that promote the generation of vortices include minute protrusions provided on the inner surface of the hole 14.
- The large number of holes 14 may be provided at intervals only in the circumferential direction of the peripheral wall 10. Further, the large number of holes 14 may be provided at intervals from each other only in the extending direction of the peripheral wall 10.

１０…周壁
１１…第１端部
１２…第２端部
１３…中間部
１４…孔
２０…第１分割体
２１…周壁部
２２…フランジ部
３０…第２分割体
３１…周壁部
３２…フランジ部 DESCRIPTION OF SYMBOLS 10... Surrounding wall 11... First end part 12... Second end part 13... Intermediate part 14... Hole 20... First divided body 21... Surrounding wall part 22... Flange part 30... Second divided body 31... Surrounding wall part 32... Flange part

Claims (4)

吸気が流通する筒状の周壁を備える内燃機関の吸気ダクトであって、
前記周壁の流路断面積は、前記周壁の延在方向の中間部から両端部に向かって徐々に大きくなっており、
前記中間部は、前記周壁の延在方向に沿って延在しており、
前記中間部の流路断面積は、前記周壁の延在方向において一定であり、
前記中間部は、前記周壁の内部と、前記周壁の外部であって且つ前記吸気ダクトの外部とを連通する多数の孔を有しており、
前記周壁は、前記周壁を周方向に分割して構成する複数の分割体を有しており、
前記複数の分割体の少なくとも１つの分割体には、前記周方向に互いに間隔をおいて多数の前記孔が設けられており、
当該分割体における多数の前記孔は、互いに同一の方向に沿って延在している、
内燃機関の吸気ダクト。 An intake duct for an internal combustion engine comprising a cylindrical peripheral wall through which intake air flows,
The flow passage cross-sectional area of the peripheral wall gradually increases from the middle part in the extending direction of the peripheral wall toward both ends,
The intermediate portion extends along the extending direction of the peripheral wall,
The flow passage cross-sectional area of the intermediate portion is constant in the extending direction of the peripheral wall,
The intermediate portion has a large number of holes that communicate between the inside of the peripheral wall and the outside of the peripheral wall and the outside of the intake duct,
The peripheral wall has a plurality of divided bodies configured by dividing the peripheral wall in the circumferential direction,
At least one of the plurality of divided bodies is provided with a large number of holes spaced apart from each other in the circumferential direction,
The plurality of holes in the divided body extend along the same direction,
Intake duct of internal combustion engine. 多数の前記孔は、前記周壁の周方向及び延在方向の双方に互いに間隔をおいて設けられている、
請求項１に記載の内燃機関の吸気ダクト。 The plurality of holes are provided at intervals in both the circumferential direction and the extending direction of the peripheral wall,
An intake duct for an internal combustion engine according to claim 1. 前記孔の流路断面積は、前記周壁の内側から外側に向かって徐々に変化している、
請求項１または請求項２に記載の内燃機関の吸気ダクト。 The flow passage cross-sectional area of the hole gradually changes from the inside to the outside of the peripheral wall.
An intake duct for an internal combustion engine according to claim 1 or 2. 前記周壁の板厚は、前記中間部から前記両端部に向かって徐々に小さくなっている、
請求項１～請求項３のいずれか一項に記載の内燃機関の吸気ダクト。 The thickness of the peripheral wall gradually decreases from the middle portion toward both ends,
An intake duct for an internal combustion engine according to any one of claims 1 to 3.
JP2021046611A 2021-03-19 2021-03-19 Internal combustion engine intake duct Active JP7376525B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2021046611A JP7376525B2 (en) 2021-03-19 2021-03-19 Internal combustion engine intake duct
PCT/JP2022/002384 WO2022196100A1 (en) 2021-03-19 2022-01-24 Air intake duct for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2021046611A JP7376525B2 (en) 2021-03-19 2021-03-19 Internal combustion engine intake duct

Publications (2)

Publication Number Publication Date
JP2022145271A JP2022145271A (en) 2022-10-03
JP7376525B2 true JP7376525B2 (en) 2023-11-08

Family

ID=83320236

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2021046611A Active JP7376525B2 (en) 2021-03-19 2021-03-19 Internal combustion engine intake duct

Country Status (2)

Country Link
JP (1) JP7376525B2 (en)
WO (1) WO2022196100A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020029927A1 (en) 1999-01-27 2002-03-14 Helmut Spannbauer Air intake device comprising a duct section provided with openings
JP2003083186A (en) 2001-09-17 2003-03-19 Inoac Corp Noise reduced duct
US20080173284A1 (en) 2007-01-23 2008-07-24 Kavanagh Scott A Engine pcv system with venturi nozzle for flow regulation
CN205225523U (en) 2015-12-15 2016-05-11 曼胡默尔滤清器（上海）有限公司 Silencer with necking down structure
JP2018525567A (en) 2015-08-28 2018-09-06 デイコ アイピー ホールディングス, エルエルシーDayco Ip Holdings, Llc Limiter using the Venturi effect

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1642857U (en) * 1951-01-18 1952-08-28 Mann & Hummel Filter INTAKE NOISE SILENCER FOR COMPRESSORS AND OTHER AIR SUCTION PISTON MACHINES.
JPS5928126Y2 (en) * 1979-06-29 1984-08-14 株式会社土屋製作所 Resonant silencer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020029927A1 (en) 1999-01-27 2002-03-14 Helmut Spannbauer Air intake device comprising a duct section provided with openings
JP2003083186A (en) 2001-09-17 2003-03-19 Inoac Corp Noise reduced duct
US20080173284A1 (en) 2007-01-23 2008-07-24 Kavanagh Scott A Engine pcv system with venturi nozzle for flow regulation
JP2018525567A (en) 2015-08-28 2018-09-06 デイコ アイピー ホールディングス, エルエルシーDayco Ip Holdings, Llc Limiter using the Venturi effect
CN205225523U (en) 2015-12-15 2016-05-11 曼胡默尔滤清器（上海）有限公司 Silencer with necking down structure

Also Published As

Publication number Publication date
JP2022145271A (en) 2022-10-03
WO2022196100A1 (en) 2022-09-22

Similar Documents

Publication Publication Date Title
JP5985315B2 (en) Ventilation duct
JP4661695B2 (en) Inspiratory sound enhancement device
KR101952142B1 (en) A vortex generator with a casing to allow multiple tidal generation
EP1195545A2 (en) Spiral bellows structure
JP6434749B2 (en) Exhaust gas recirculation device and engine system including the exhaust gas recirculation device
JP6629627B2 (en) Noise reduction structure and supercharging device
JP2007127108A (en) Compressor of exhaust turbosupercharger
EP3056723A1 (en) Intake noise reducing apparatus for internal combustion engine
JP6394154B2 (en) Intake device
JP5340816B2 (en) Ventilation duct
JP7376525B2 (en) Internal combustion engine intake duct
JP5240857B2 (en) Ventilation duct
JP6700225B2 (en) Silencer
JP2007224873A (en) Intake device and intake manifold for internal combustion engine
JP6444383B2 (en) An acoustic damping system for a gas turbine engine combustor.
JP7176887B2 (en) air hose
JP4951544B2 (en) Intake device for internal combustion engine
WO2021153193A1 (en) Duct
JP2016108957A (en) Silencer
JP7061221B1 (en) Exhaust pipes for automobiles and mufflers for automobiles
JP6871285B2 (en) Tail pipe
JP2012067673A (en) Muffler
JP2019124210A (en) Intake structure of internal combustion engine
KR102083830B1 (en) Inhaling acceleration device for an internal combustion engine
JP2017172511A (en) Exhaust system for internal combustion engine

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20230130

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20230613

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20230809

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20230919

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20230927

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20231010

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20231026

R150 Certificate of patent or registration of utility model

Ref document number: 7376525

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150