JPH084613A - Intake duct - Google Patents
Intake ductInfo
- Publication number
- JPH084613A JPH084613A JP15796194A JP15796194A JPH084613A JP H084613 A JPH084613 A JP H084613A JP 15796194 A JP15796194 A JP 15796194A JP 15796194 A JP15796194 A JP 15796194A JP H084613 A JPH084613 A JP H084613A
- Authority
- JP
- Japan
- Prior art keywords
- duct
- intake
- cavity
- intake duct
- flow passage
- 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
Links
Landscapes
- Exhaust Silencers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、内燃機関の吸気ダク
トに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake duct for an internal combustion engine.
【０００２】[0002]
【従来の技術】従来、内燃機関では吸気ダクトの共鳴に
よる吸気騒音を抑制するために、レゾネータ等の消音器
を吸気ダクトと別置きで設けている。2. Description of the Related Art Conventionally, in an internal combustion engine, a silencer such as a resonator is provided separately from the intake duct in order to suppress intake noise due to resonance of the intake duct.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、このよ
うに消音器を吸気ダクトと別置きで設ける場合、エンジ
ンルームのレイアウト上、消音器の設置場所を確保する
ことが困難である問題点を有していた。However, when the muffler is provided separately from the intake duct, it is difficult to secure a place for installing the muffler due to the layout of the engine room. Was there.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するた
め、本発明の請求項１の吸気ダクトは、ダクト本体内
に、吸気に必要な流量を確保し得る主流通路に対し仕切
板により隔てられた空洞部を並列状に配置し、前記仕切
板には前記主流通路と前記空洞部を連通させる連通穴を
設けることにより前記空洞部に前記ダクト本体の共鳴抑
制機能を持たせたことを特徴とする。また請求項２の発
明は、上記請求項１の吸気ダクトにおいて、前記空洞部
は前記ダクト本体の長手方向に複数形成され、各々対応
する前記連通穴を介して前記主流通路に連通しているこ
とを特徴とする。In order to solve the above-mentioned problems, the intake duct according to claim 1 of the present invention is separated by a partition plate in the duct main body from a main flow passage capable of ensuring a flow rate necessary for intake. The hollow portions are arranged in parallel, and the partition plate is provided with a communication hole for communicating the main flow passage and the hollow portion, whereby the hollow portion has a resonance suppressing function of the duct body. To do. According to a second aspect of the present invention, in the intake duct according to the first aspect, a plurality of the hollow portions are formed in a longitudinal direction of the duct main body and communicate with the main flow passage through the corresponding communicating holes. Is characterized by.
【０００５】[0005]
【作用】請求項１の発明ではダクト本体内の主流通路を
流れる吸気はその一部が連通穴を経て空洞部に流入して
共鳴を抑制するので、吸気ダクト自体に消音機能が与え
られる。請求項２の発明では空洞部がダクト本体の長手
方向に複数形成され、各々対応する連通穴を介して主流
通路に連通しているので、個々の空洞部長さ及び連通穴
の径あるいは位置を適宜に設定することで理想的な消音
機能を与えることができる。According to the first aspect of the invention, a part of the intake air flowing through the main flow passage in the duct body flows into the cavity through the communication hole to suppress resonance, so that the intake duct itself has a silencing function. In the invention of claim 2, since a plurality of cavities are formed in the longitudinal direction of the duct body and communicate with the main flow passage through the corresponding communication holes, the length of each cavity and the diameter or position of the communication hole are appropriately set. You can give an ideal silencing function by setting to.
【０００６】[0006]
【実施例】次に、本発明の第１実施例による吸気ダクト
を図１〜図４を参照して説明すると、図１に一部を示し
た吸気ダクトは円筒状のダクト本体１を有しており、図
２及び図３に示すように、該ダクト本体１の内部の図示
上半分には吸気に必要な流量を確保できる断面積を有す
る主流通路２が形成され、一方、下半分には主流通路２
に対し仕切板３により隔てられた空洞部４〜４がダクト
本体１の長手方向に複数設けられている。1 to 4, an intake duct according to a first embodiment of the present invention will be described. The intake duct, a portion of which is shown in FIG. 1, has a cylindrical duct body 1. As shown in FIGS. 2 and 3, a main flow passage 2 having a cross-sectional area capable of ensuring a flow rate required for intake is formed in the upper half of the inside of the duct body 1 while the lower half of the duct main body 1 is formed. Mainstream passage 2
On the other hand, a plurality of cavities 4 to 4 separated by the partition plate 3 are provided in the longitudinal direction of the duct body 1.
【０００７】仕切板３はダクト本体１の長手方向に延び
る長手方向仕切板５と、該長手方向仕切板５からダクト
本体１の壁部に至り半径方向に延びる複数の半径方向仕
切板６〜６とからなっており、これらの半径方向仕切板
６〜６により空洞部４〜４が互いから隔てられている。The partition plate 3 is a longitudinal partition plate 5 extending in the longitudinal direction of the duct body 1, and a plurality of radial partition plates 6 to 6 extending from the longitudinal partition plate 5 to the wall of the duct body 1 in the radial direction. These radial partition plates 6-6 separate the cavities 4-4 from one another.
【０００８】また、長手方向仕切板５には、各空洞部４
の下流側（吸気の流れ方向についての下流側）端部にお
いて該空洞部４と主流通路２とを連通させる連通穴７〜
７（図４参照）が設けられており、主流通路２を流れる
吸気は連通穴７〜７を介して空洞部４〜４にそれぞれ流
入する。ここで、空洞部４〜４はダクト共鳴周波数の１
／４波長分の長さを確保するように設定され、各々がサ
イドブランチタイプの消音器を構成するものである。Further, the longitudinal partition plate 5 is provided with each cavity 4
Communication holes 7 through which the cavity portion 4 and the main flow passage 2 are communicated with each other at an end portion on the downstream side (downstream side in the flow direction of intake air) of
7 (see FIG. 4) is provided, and the intake air flowing in the main flow passage 2 flows into the hollow portions 4 to 4 through the communication holes 7 to 7, respectively. Here, the cavities 4 to 4 have a duct resonance frequency of 1
It is set to secure a length of / 4 wavelength, and each constitutes a side branch type silencer.
【０００９】すなわち、本実施例では、吸気ダクト本体
１の内部に主流通路２と並列状に消音機能を有する空洞
部４〜４を設けたものであり、消音器を別個に必要とし
ないため、エンジンルームのレイアウト上の犠牲を最小
限とすることができ、エンジンルーム内のスペースを有
効利用できる利点を有する。That is, in this embodiment, the air intake duct main body 1 is provided with the hollow portions 4 to 4 having a silencing function in parallel with the main flow passage 2, and a silencer is not required separately. This has the advantage that the layout cost of the engine room can be minimized and the space in the engine room can be effectively used.
【００１０】また、空洞部４〜４を複数設けてあり、各
空洞部４の長さに加えて、その断面積あるいは形状、さ
らには対応する連通穴７の径等を理想的な消音が得られ
るようにチューニングすることで、優れた消音効果が得
られる。Further, a plurality of hollow portions 4 to 4 are provided, and in addition to the length of each hollow portion 4, its cross-sectional area or shape, and the diameter of the corresponding communicating hole 7 etc. can be ideally silenced. By tuning so that it is possible, you can get an excellent muffling effect.
【００１１】次に、本発明の第２実施例を図５を参照し
て説明する。本第２実施例は第１実施例の連通穴７〜７
に対応する連通穴７Ａ〜７Ａが第１実施例と異なる位置
に配置されていること、また、空洞部４〜４に対応する
空洞部４Ａ〜４Ａが空洞部４〜４よりも長くなっている
点を除き、第１実施例と同様であり、同様な部材には同
一符号を付して説明を省略する。Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment is the communication holes 7 to 7 of the first embodiment.
The communication holes 7A to 7A corresponding to No. 4 are arranged at positions different from those in the first embodiment, and the cavity portions 4A to 4A corresponding to the cavity portions 4 to 4 are longer than the cavity portions 4 to 4. Except for the points, it is the same as the first embodiment, and the same members are given the same reference numerals and the description thereof is omitted.
【００１２】本実施例の連通穴７Ａ〜７Ａは各々対応す
る空洞部４Ａの下流側端部よりも上流側位置において長
手方向仕切板５に設けられている。空洞部４Ａ〜４Ａは
このような連通穴７Ａ〜７Ａの配置により、いわゆるレ
ゾネータタイプの消音器を構成するものであり、その作
用効果は上記第１実施例と同様である。The communication holes 7A to 7A of this embodiment are provided in the longitudinal partition plate 5 at positions upstream of the downstream end of the corresponding cavity 4A. The cavity portions 4A to 4A constitute a so-called resonator type silencer by the arrangement of the communication holes 7A to 7A, and the function and effect thereof are the same as those of the first embodiment.
【００１３】[0013]
【発明の効果】請求項１の発明では吸気ダクト自体に消
音機能が与えられるので、消音器を別個に設ける必要が
なくなり、エンジンルームのレイアウト上の犠牲を最小
限とすることができ、エンジンルーム内のスペースを有
効利用できる利点を有する。また、請求項２の発明では
空洞部を複数設けて、個々の空洞部の長さ及び連通穴の
径あるいは位置を適宜に設定することで理想的な消音機
能を与えることができるので、消音性能が向上する利点
を有する。According to the invention of claim 1, since the intake duct itself is provided with a muffling function, it is not necessary to provide a muffler separately, and the sacrifice in the layout of the engine room can be minimized. There is an advantage that the space inside can be effectively used. Further, in the invention of claim 2, since a plurality of hollow portions are provided and the length of each hollow portion and the diameter or position of the communication hole are appropriately set, an ideal silencing function can be provided, so that the silencing performance is improved. Has the advantage of improving.
【図１】本発明の第１実施例による吸気ダクトの要部の
断面図。FIG. 1 is a sectional view of a main part of an intake duct according to a first embodiment of the present invention.
【図２】図１の左側面図。FIG. 2 is a left side view of FIG.
【図３】図１のＡ−Ａ線断面図。3 is a cross-sectional view taken along the line AA of FIG.
【図４】図３のＢ−Ｂ線断面図。FIG. 4 is a sectional view taken along line BB of FIG.
【図５】本発明の第２実施例による吸気ダクトの要部の
断面図。FIG. 5 is a sectional view of a main part of an intake duct according to a second embodiment of the present invention.
１ ダクト本体 ２ 主流通路 ３ 仕切板 ４，４Ａ 空洞部 ７，７Ａ 連通穴 1 Duct main body 2 Main flow passage 3 Partition plate 4, 4A Cavity part 7, 7A Communication hole
Claims (2)
保し得る主流通路に対し仕切板により隔てられた空洞部
を並列状に配置し、前記仕切板には前記主流通路と前記
空洞部を連通させる連通穴を設けることにより前記空洞
部に前記ダクト本体の共鳴抑制機能を持たせたことを特
徴とする吸気ダクト。1. A main body of a duct, wherein a cavity separated by a partition plate is arranged in parallel with a mainstream passage capable of securing a flow rate required for intake air, and the partition plate has the mainstream passage and the cavity. An intake duct characterized in that the cavity portion is provided with a resonance suppressing function of the duct body by providing a communication hole for communicating with each other.
に複数形成され、各々対応する前記連通穴を介して前記
主流通路に連通していることを特徴とする吸気ダクト。2. The intake duct, wherein a plurality of the hollow portions are formed in a longitudinal direction of the duct body, and communicate with the main flow passage via the corresponding communication holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15796194A JPH084613A (en) | 1994-06-15 | 1994-06-15 | Intake duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15796194A JPH084613A (en) | 1994-06-15 | 1994-06-15 | Intake duct |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH084613A true JPH084613A (en) | 1996-01-09 |
Family
ID=15661240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15796194A Pending JPH084613A (en) | 1994-06-15 | 1994-06-15 | Intake duct |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH084613A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013141951A (en) * | 2012-01-12 | 2013-07-22 | Toyo Tire & Rubber Co Ltd | Assembly of pneumatic tire and rim |
-
1994
- 1994-06-15 JP JP15796194A patent/JPH084613A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013141951A (en) * | 2012-01-12 | 2013-07-22 | Toyo Tire & Rubber Co Ltd | Assembly of pneumatic tire and rim |
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