JP2004150309A - Air intake duct - Google Patents

Air intake duct Download PDF

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Publication number
JP2004150309A
JP2004150309A JP2002314504A JP2002314504A JP2004150309A JP 2004150309 A JP2004150309 A JP 2004150309A JP 2002314504 A JP2002314504 A JP 2002314504A JP 2002314504 A JP2002314504 A JP 2002314504A JP 2004150309 A JP2004150309 A JP 2004150309A
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JP
Japan
Prior art keywords
intake duct
intake
air
outside air
muffling
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.)
Pending
Application number
JP2002314504A
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Japanese (ja)
Inventor
Takayuki Ichikawa
高行 市川
Kenji Hiroe
賢治 廣江
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.)
Roki Co Ltd
Original Assignee
Toyo Roki Mfg 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 Toyo Roki Mfg Co Ltd filed Critical Toyo Roki Mfg Co Ltd
Priority to JP2002314504A priority Critical patent/JP2004150309A/en
Publication of JP2004150309A publication Critical patent/JP2004150309A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide an air intake duct capable of reducing the noise to be generated inside thereof by simplifying the structure. <P>SOLUTION: This air intake duct 1 for leading the open air to an air intake passage of an internal combustion engine and provided with a rib for improving rigidity inside thereof is provided with a silencer part 10 having an opening 14 for housing the open air and while communicating with the intake air passage 2, and the silencer part 10 is used as a rib. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、吸気ダクトに関し、特に四輪自動車の吸気ダクトの構造に関する。
【0002】
【従来の技術】
従来の略扁平形状の吸気ダクト50は、図5に示すように、内部に補強用のリブ51を備えるとともに、吸気ダクト50の吸気経路52と連通するように開口53aを有するサイドブランチ型のサイレンサ53を吸気経路の外部の所定位置に突出させて備えている。
【0003】
この吸気ダクトは、サイドブランチ型サイレンサが特定の周波数で共振するように設定されている。
【0004】
【発明が解決しようとする課題】
しかし、従来のサイドブランチ型のサイレンサを備える吸気ダクトにおいて、このサイドブランチ型のサイレンサは、空気の流れにさほど影響のない外部位置に取り付けられるので取り付け位置が限定されてしまうという問題点がある。また、実質上、吸気ダクトの外部にサイドブランチ型サイレンサが備えられるため、車輌に積載する際のレイアウト上、サイドブランチ型サイレンサが邪魔になるなどの問題点があった。
【0005】
本発明が解決しようとする課題には、上記した問題が一例として挙げられる。
【0006】
そこで、本発明は、構造を容易にして、内部から発生する音を低減できる吸気ダクトを提供することを目的とする。
【0007】
【課題を解決するための手段】
以下、本発明について説明する。なお、本発明の理解を容易にするために添付図面の参照符号を括弧書きにて付記するが、それにより本発明が図示の形態に限定されるものではない。
【0008】
本発明の吸気ダクトは、内部に剛性を高めるためのリブを備え、内燃機関の吸気経路に設けられる外気を導入するための吸気ダクトにおいて、前記外気を収容すると共に前記吸気経路(2)に連通する開口(14)を有する消音部(10)を備え、前記消音部を前記リブとして用いる。
【0009】
この発明によれば、剛性を高めるリブを備えた吸気ダクトにおいて、このリブに代えて消音部を備えることにより、吸気ダクトの他の位置に吸気音を減衰するための消音部を備える必要がなくなる。また、外気導入により生じる吸気音や構造上発生する放射音を低減できる。また、吸気ダクトの成型が容易になるため、コストダウンを図れる。
【0010】
また、前記吸気ダクトは、断面形状が矩形の扁平形状に形成され、前記消音部は、前記吸気ダクトの上面及び下面の壁部(5、3)に垂設される一対の仕切体(11)と、前記吸気ダクトの上流側の仕切体の端部、及び前記上面及び下面の壁部により形成される開口を塞ぐための遮蔽体(12)と、を有し、前記一対の仕切体と前記上面及び下面の壁部と遮蔽体とで構成されるようにしてもよい。
【0011】
この発明によれば、特定の周波数帯域における吸気音を消音できる。
【0012】
また、前記消音部は、前記吸気ダクトの前記吸気経路に直交する断面において、長辺側の前記上面の壁部及び下面の壁部のほぼ中央に配置されるとよい。
【0013】
この発明によれば、導入される外気により発生する吸気音及び/又は放射音の音圧が最大の位置に消音部が設けられるとともに、前記消音部が剛性アップ用のリブとして機能するので、この消音部のみで吸気音と放射音の低減が可能となる。
【0014】
【発明の実施の形態】
以下、図1〜図4を参照して、本発明である吸気ダクトに係る実施の形態について詳細に説明する。図1は本発明の吸気ダクトの全体構造図、図2は図1のA−A断面図、図3は図2のB−B断面図、図4は消音部の他の実施形態を示す図である。なお、図4において、図2と共通する部分には同一符号を付し、それらの説明は省略する。
【0015】
図1に示すように、吸気ダクト1は外気をエアクリーナ装置に連通するための吸気通路2を備えている。吸気通路2の端部には、一方に外気を導入するための開口2aを有し、他方にエアクリーナ装置と連通して接続される開口2b、を有する。また、この両開口2a、2bは略矩形状である。すなわち吸気ダクト1は略扁平形状に形成される。また、吸気通路2は、所定の形状に湾曲して形成される。
【0016】
吸気通路2は、図3に示すように、底部壁3と、その底部壁3の両端部に垂設して形成される側部壁4、4と、その側部壁4により形成される開口を塞ぐ上部壁5と、を備えている。
【0017】
また、吸気通路2の内部には、図2に示すように、吸気音を減衰するための消音部10を備える。消音部10は、吸気通路2を形成する上部壁5と底部壁3とに垂設される一対の仕切体11、11と、上流側の仕切体11の端部、上部壁5、及び底部壁3によって形成される開口を塞ぐための遮蔽体12と、を備えている。
【0018】
すなわち、消音部10は、外気を収容する収容部13と、吸気通路2に連通する開口14を有する。これにより、消音部10の共鳴吸収によって吸気音が吸収され、吸気音が減衰される。
【0019】
また、一対の仕切体11は、吸気通路2の形状にしたがって、吸気通路2とほぼ略平行に、所定の形状に湾曲して形成される。また、消音部10は、図4に示すように、吸気通路2の上流側から吸気される外気の流れを妨げないように、一対の仕切体11a、11aの端部が尖鋭状になるように備えられてもよい。このように消音部10の上流側端部を尖鋭状にすることにより、外気の流れが整流される。
【0020】
また、この消音部10(一対の仕切体11、11aや遮蔽体12)は、吸気ダクト1の剛性を高めるためのリブとしても機能する。そのため、剛性不足から生じる吸気ダクトの放射音を低減できる。
【0021】
また、この消音部10は、好ましくは外気を吸気する際に、吸気通路内部においての音圧が最も高い位置、及び/又は構造上発生する吸気ダクト1の放射音の音圧が最も高い位置に備えられるとよい。例えば、吸気ダクト1の上流側開口近傍の中央に備えられる。更に具体的には、吸気通路2を略均一に仕切るように設けられる。
【0022】
また、図示しないが、消音部10は、外気の導入方向に沿って複数設けてもよい。その場合、収容部13の容積が消音部10ごとに所定の周波数帯域で共鳴するように設定される。
【0023】
以上に説明したように、本発明の吸気ダクトは、内部に剛性を高めるためのリブを備え、内燃機関の吸気経路に設けられる外気を導入するための吸気ダクト1において、外気を収容すると共に吸気経路に連通する開口を有する消音部10を備え、消音部10をリブとして用いるものである。また、この吸気ダクト1は、断面形状が矩形の扁平形状に形成され、消音部10は、吸気ダクト1の上面及び下面の壁部(上部壁5、底部壁3)に垂設される一対の仕切体11を有し、一対の仕切体11と上部壁5と、底部壁3とで構成される。また、消音部10は、吸気ダクト1の上部壁5と底部壁3に垂設される一対の仕切体11と、吸気ダクト1の上流側の仕切体11の端部と、上部壁5と、底部壁3と、により形成される開口を塞ぐための遮蔽体12と、を有し、この一対の仕切体11と、上部壁5と、底部壁3と、遮蔽体12と、構成されてもよい。また、消音部10は、吸気ダクトの吸気経路に直交する断面において、長辺側の上部壁5と底部壁3のほぼ中央に配置されるとよい。また、消音部10は、吸気ダクト1の外形に対して略平行に設けられているとよい。また、消音部10の上流側端部は、尖鋭しているとよい。また、消音部10は、外気の導入方向に沿って吸気ダクト内部に複数設けられているとよい。また、吸気ダクト1は、外気を導入する空気取入口と空気をろ過するエアクリーナとの間に設けられる。
【0024】
このように、剛性を高めるリブを備えた吸気ダクトにおいて、このリブに代えて消音部10を備えることにより、吸気ダクトの他の位置に吸気音を減衰するための消音部を備える必要がなくなる。また、消音部10により、外気導入により生じる吸気音や構造上発生する放射音を低減できる。また、吸気ダクトの成型が容易になるため、コストダウンを図れる。
【0025】
また、消音部10が吸気ダクト1の外形に対して平行に設けることにより吸気ダクト内に導入される外気を整流できる。また、消音部10の上流側端部を尖鋭することにより、外気を整流できる。また、消音部10を、外気の導入方向に沿って複数設けることにより、複数の特定の周波数帯域の吸気音、及び/又は放射音を消音できる。また、吸気ダクト1を外気を導入する空気取入口と空気をろ過するエアクリーナとの間に設けることにより、空気取入口により取り入れられた外気を効率良くエアクリーナ装置に導入できる。
【0026】
本発明は以上の実施形態に限定されることなく、種々の形態にて実施してよい。例えば、消音部10を設ける位置は適宜変更できる。また、吸気ダクト1の形状は、適宜変更される。
【図面の簡単な説明】
【図1】本発明の吸気ダクトの全体構造図である。
【図2】図1のA−A断面図である。
【図3】図2のB−B断面図である。
【図4】消音部の他の実施形態を示す図である。
【図5】従来の吸気ダクトの断面構造図である。
【符号の説明】
2 吸気経路(吸気通路)
3 吸気ダクトの下面の壁部(底部壁)
5 吸気ダクトの上面の壁部(上部壁)
10 消音部
11、11a 仕切体
12 遮蔽体
14 開口
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an intake duct, and more particularly, to a structure of an intake duct of a four-wheel vehicle.
[0002]
[Prior art]
As shown in FIG. 5, a conventional substantially flat intake duct 50 has a reinforcing rib 51 therein and a side branch type silencer having an opening 53a communicating with an intake passage 52 of the intake duct 50. 53 is provided at a predetermined position outside the intake path.
[0003]
This intake duct is set so that the side branch silencer resonates at a specific frequency.
[0004]
[Problems to be solved by the invention]
However, in a conventional intake duct including a side branch type silencer, the side branch type silencer is mounted at an external position that does not significantly affect the flow of air, so that the mounting position is limited. Further, since the side branch type silencer is provided substantially outside the intake duct, there is a problem that the side branch type silencer obstructs the layout when the vehicle is loaded on a vehicle.
[0005]
The problem to be solved by the present invention includes the above-mentioned problem as an example.
[0006]
Therefore, an object of the present invention is to provide an intake duct that can simplify the structure and reduce noise generated from inside.
[0007]
[Means for Solving the Problems]
Hereinafter, the present invention will be described. In addition, in order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are added in parentheses, but the present invention is not limited to the illustrated embodiment.
[0008]
An intake duct according to the present invention includes a rib for increasing rigidity inside, and is an intake duct provided in an intake passage of an internal combustion engine for introducing outside air, wherein the intake duct accommodates the outside air and communicates with the intake passage (2). A silencer (10) having an opening (14) to be used, and the silencer is used as the rib.
[0009]
According to the present invention, in the intake duct having the rib for increasing the rigidity, by providing the muffling part instead of the rib, it is not necessary to provide the muffling part for attenuating the intake sound at another position of the intake duct. . In addition, intake noise caused by the introduction of outside air and radiated sound caused by the structure can be reduced. Further, since the molding of the intake duct becomes easy, the cost can be reduced.
[0010]
Further, the intake duct is formed in a flat shape having a rectangular cross section, and the muffling portion is formed of a pair of partition bodies (11) vertically suspended from upper and lower walls (5, 3) of the intake duct. And a shield (12) for closing an opening formed by an end of the partition on the upstream side of the intake duct and walls on the upper surface and the lower surface, and the pair of partitions and the shield You may make it comprise the wall part of an upper surface and a lower surface, and a shielding body.
[0011]
According to the present invention, the intake sound in a specific frequency band can be silenced.
[0012]
Further, it is preferable that the muffling part is disposed substantially at the center of the upper surface wall and the lower surface wall on the long side in a cross section orthogonal to the air intake path of the air intake duct.
[0013]
According to the present invention, the muffling portion is provided at the position where the sound pressure of the intake sound and / or the radiated sound generated by the introduced outside air is maximum, and the muffling portion functions as a rib for increasing rigidity. Only the silencer can reduce the intake sound and the radiated sound.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of an intake duct according to the present invention will be described in detail with reference to FIGS. 1 is an overall structural view of an intake duct of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a sectional view taken along line BB of FIG. 2, and FIG. It is. In FIG. 4, the same reference numerals are given to parts common to FIG. 2, and description thereof will be omitted.
[0015]
As shown in FIG. 1, the intake duct 1 is provided with an intake passage 2 for communicating outside air to an air cleaner device. One end of the intake passage 2 has an opening 2a for introducing outside air, and the other end has an opening 2b that is connected to and connected to the air cleaner device. The openings 2a and 2b are substantially rectangular. That is, the intake duct 1 is formed in a substantially flat shape. The intake passage 2 is formed to be curved in a predetermined shape.
[0016]
As shown in FIG. 3, the intake passage 2 has a bottom wall 3, side walls 4, 4 formed vertically at both ends of the bottom wall 3, and an opening formed by the side wall 4. And an upper wall 5 that closes the upper wall.
[0017]
Further, as shown in FIG. 2, a silencer 10 for attenuating intake noise is provided inside the intake passage 2. The muffling part 10 includes a pair of partition members 11, 11 suspended from the upper wall 5 and the bottom wall 3 forming the intake passage 2, an end of the upstream partition member 11, the upper wall 5, and the bottom wall. And a shield 12 for closing the opening formed by 3.
[0018]
That is, the silencing section 10 has a housing section 13 for housing outside air and an opening 14 communicating with the intake passage 2. Thereby, the intake sound is absorbed by the resonance absorption of the silencer 10, and the intake sound is attenuated.
[0019]
Further, the pair of partitioning bodies 11 are formed in a predetermined shape substantially in parallel with the intake passage 2 according to the shape of the intake passage 2. Further, as shown in FIG. 4, the silencer 10 has a pair of partitioning bodies 11a, 11a having sharp ends so as not to obstruct the flow of the outside air taken in from the upstream side of the intake passage 2. May be provided. By making the upstream end of the silencer 10 sharp like this, the flow of outside air is rectified.
[0020]
The silencer 10 (the pair of partitions 11, 11a and the shield 12) also functions as a rib for increasing the rigidity of the intake duct 1. Therefore, radiation noise of the intake duct caused by insufficient rigidity can be reduced.
[0021]
In addition, the sound deadening section 10 is preferably located at a position where the sound pressure inside the intake passage is highest when the outside air is sucked, and / or a position where the sound pressure of the radiated sound of the intake duct 1 generated structurally is highest. It should be provided. For example, it is provided at the center near the upstream opening of the intake duct 1. More specifically, it is provided so as to partition the intake passage 2 substantially uniformly.
[0022]
Although not shown, a plurality of silencers 10 may be provided along the direction in which outside air is introduced. In that case, the volume of the storage unit 13 is set to resonate in a predetermined frequency band for each muffling unit 10.
[0023]
As described above, the intake duct of the present invention is provided with ribs for increasing rigidity inside, and the intake duct 1 for introducing outside air provided in the intake passage of the internal combustion engine accommodates the outside air and intakes the outside air. A silencer having an opening communicating with the path is provided, and the silencer is used as a rib. Further, the intake duct 1 is formed in a flat shape with a rectangular cross section, and the muffling section 10 is formed of a pair of vertically extending walls (upper wall 5 and bottom wall 3) on the upper and lower walls of the intake duct 1. It has a partition 11 and is composed of a pair of partitions 11, an upper wall 5, and a bottom wall 3. In addition, the noise reduction unit 10 includes a pair of partition members 11 vertically suspended from the upper wall 5 and the bottom wall 3 of the intake duct 1, an end of the partition member 11 on the upstream side of the intake duct 1, the upper wall 5, It has a shielding body 12 for closing an opening formed by the bottom wall 3 and the pair of partitions 11, the upper wall 5, the bottom wall 3, and the shielding body 12. Good. In addition, the silencer 10 may be disposed substantially at the center of the upper wall 5 and the bottom wall 3 on the long side in a cross section orthogonal to the intake path of the intake duct. Further, the silencer 10 may be provided substantially parallel to the outer shape of the intake duct 1. Further, the upstream end of the silencer 10 may be sharp. Further, it is preferable that a plurality of the sound deadening units 10 are provided inside the intake duct along the direction in which outside air is introduced. The intake duct 1 is provided between an air intake for introducing outside air and an air cleaner for filtering air.
[0024]
Thus, in the intake duct provided with the rib for increasing the rigidity, by providing the muffling section 10 instead of the rib, it is not necessary to provide a muffling section for attenuating the intake sound at another position of the intake duct. In addition, the silencer 10 can reduce intake noise caused by the introduction of outside air and radiation noise generated structurally. Further, since the molding of the intake duct becomes easy, the cost can be reduced.
[0025]
Further, by providing the muffling section 10 in parallel with the outer shape of the intake duct 1, external air introduced into the intake duct can be rectified. In addition, the outside air can be rectified by sharpening the upstream end of the silencer 10. In addition, by providing a plurality of muffling units 10 along the direction in which outside air is introduced, it is possible to muffle intake sounds and / or radiation sounds in a plurality of specific frequency bands. Further, by providing the intake duct 1 between the air inlet for introducing the outside air and the air cleaner for filtering the air, the outside air taken in by the air inlet can be efficiently introduced into the air cleaner device.
[0026]
The present invention is not limited to the above embodiments, but may be implemented in various forms. For example, the position where the silencer 10 is provided can be changed as appropriate. Further, the shape of the intake duct 1 is appropriately changed.
[Brief description of the drawings]
FIG. 1 is an overall structural view of an intake duct of the present invention.
FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 3 is a sectional view taken along line BB of FIG. 2;
FIG. 4 is a diagram showing another embodiment of a muffling unit.
FIG. 5 is a sectional structural view of a conventional intake duct.
[Explanation of symbols]
2 Intake path (intake path)
3 Lower wall of intake duct (bottom wall)
5 Top wall of intake duct (upper wall)
10 Silencer 11, 11a Partition 12 Shield 14 Opening

Claims (3)

内部に剛性を高めるためのリブを備え、内燃機関の吸気経路に設けられる外気を導入するための吸気ダクトにおいて、
前記外気を収容すると共に前記吸気経路に連通する開口を有する消音部を備え、前記消音部を前記リブとして用いることを特徴とする吸気ダクト。
In the intake duct for introducing the outside air provided in the intake path of the internal combustion engine, provided with a rib for increasing rigidity inside,
An air intake duct, comprising: a muffling part having an opening for accommodating the outside air and communicating with the air intake path, and using the muffling part as the rib.
前記吸気ダクトは、断面形状が矩形の扁平形状に形成され、前記消音部は、前記吸気ダクトの上面及び下面の壁部に垂設される一対の仕切体と、前記吸気ダクトの上流側の仕切体の端部及び前記上面及び下面の壁部により形成される開口を塞ぐための遮蔽体と、を有し、
前記一対の仕切体と前記上面及び下面の壁部と遮蔽体とで構成されることを特徴とする請求項1に記載の吸気ダクト。
The intake duct is formed in a flat shape having a rectangular cross section, and the muffling section includes a pair of partition members vertically suspended on upper and lower walls of the intake duct, and a partition on an upstream side of the intake duct. And a shield for closing an opening formed by an end of the body and the walls of the upper surface and the lower surface,
The intake duct according to claim 1, wherein the intake duct includes the pair of partition members, the upper and lower walls, and a shield.
前記消音部は、前記吸気ダクトの前記吸気経路に直交する断面において、長辺側の前記上面の壁部及び下面の壁部のほぼ中央に配置されることを特徴とする請求項2に記載の吸気ダクト。The said noise reduction part is arrange | positioned in the cross section orthogonal to the said intake path of the said intake duct, and it is arrange | positioned in the substantially center of the said upper surface wall part and the lower surface wall part by the long side. Intake duct.
JP2002314504A 2002-10-29 2002-10-29 Air intake duct Pending JP2004150309A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007078322A (en) * 2005-09-16 2007-03-29 Tostem Corp Duct having sound diminishing function, and duct type ventilator for building
EP1873391A2 (en) * 2006-06-29 2008-01-02 Nissan Motor Company Limited Internal combustion engine intake device
JP2009293535A (en) * 2008-06-06 2009-12-17 Nissan Motor Co Ltd Atmospheric air introducing duct and installation structure thereof
US20190203681A1 (en) * 2017-12-28 2019-07-04 Inoac Corporation Engine intake air duct

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007078322A (en) * 2005-09-16 2007-03-29 Tostem Corp Duct having sound diminishing function, and duct type ventilator for building
EP1873391A2 (en) * 2006-06-29 2008-01-02 Nissan Motor Company Limited Internal combustion engine intake device
EP1873391A3 (en) * 2006-06-29 2009-02-04 Nissan Motor Company Limited Internal combustion engine intake device
US7556008B2 (en) 2006-06-29 2009-07-07 Nissan Motor Co., Ltd. Internal combustion engine intake device
JP2009293535A (en) * 2008-06-06 2009-12-17 Nissan Motor Co Ltd Atmospheric air introducing duct and installation structure thereof
US20190203681A1 (en) * 2017-12-28 2019-07-04 Inoac Corporation Engine intake air duct
CN109973264A (en) * 2017-12-28 2019-07-05 井上株式会社 Engine sucks air pipeline
JP2019120161A (en) * 2017-12-28 2019-07-22 株式会社イノアックコーポレーション Suction duct for engine
US10907590B2 (en) 2017-12-28 2021-02-02 Inoac Corporation Engine intake air duct
CN109973264B (en) * 2017-12-28 2022-06-21 井上株式会社 Engine air intake duct

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