JPH025907B2 - - Google Patents
Info
- Publication number
- JPH025907B2 JPH025907B2 JP9191385A JP9191385A JPH025907B2 JP H025907 B2 JPH025907 B2 JP H025907B2 JP 9191385 A JP9191385 A JP 9191385A JP 9191385 A JP9191385 A JP 9191385A JP H025907 B2 JPH025907 B2 JP H025907B2
- Authority
- JP
- Japan
- Prior art keywords
- cross
- branch pipe
- pipe
- sectional shape
- branch
- 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.)
- Expired
Links
- 230000003584 silencer Effects 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000001743 silencing effect Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Description
【発明の詳細な説明】
Ａ 発明の目的
(1) 産業上の利用分野
本発明は、気体通路管の途中に、先端が閉塞し
た分岐管が接続されて成るサイドブランチ型消音
装置に関する。DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention (1) Industrial Application Field The present invention relates to a side branch type muffler in which a branch pipe with a closed end is connected in the middle of a gas passage pipe.
(2) 従来の技術
かかる消音装置は、たとえば実開昭48−32734
号、実開昭50−1104号、実開昭50−136804号、実
開昭51−16144号、実開昭56−138108号および特
開昭55−51910号などで良く知られている。(2) Prior art Such a silencer is known, for example, from Utility Model Application Publication No. 48-32734.
It is well known from the following publications: No. 1104-1982, No. 136804-1980, No. 16144-1981, No. 138108-1988, and No. 51910-55.
(3) 発明が解決しようとする問題点
上記各従来技術では、分岐管の断面形状が全長
にわたつて一定である。ところが車両のエンジン
ルームなどのように狭いスペースに分岐管を配置
するときは、他の機器との接触を回避するために
分岐管配置の方向が限定される。(3) Problems to be Solved by the Invention In each of the above-mentioned conventional techniques, the cross-sectional shape of the branch pipe is constant over the entire length. However, when a branch pipe is arranged in a narrow space such as an engine room of a vehicle, the direction in which the branch pipe is arranged is limited to avoid contact with other equipment.
ところで、本発明者の実験によれば、分岐管の
断面積を一定とすれば、断面形状の相違に拘ら
ず、同様の消音効果が得られることが確認され
た。 By the way, according to experiments conducted by the present inventor, it has been confirmed that if the cross-sectional area of the branch pipe is constant, the same noise reduction effect can be obtained regardless of the difference in cross-sectional shape.
本発明は、かかる事情に鑑みてなされたもので
あり、分岐管の断面形状を変化させることによ
り、分岐管配置の自由度を増大させたサイドブラ
ンチ型消音装置を提供することを目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a side branch type muffler in which the degree of freedom in arranging branch pipes is increased by changing the cross-sectional shape of the branch pipes.
Ｂ 発明の構成
(1) 問題点を解決するための手段
そして上記目的を達成するために本発明によれ
ば、気体通路管の途中に、先端に閉塞した分岐管
が接続されて成るサイドブランチ型消音装置にお
いて、前記分岐管は、他の機器との接触を避ける
べき部分の断面が楕円状に、またその残余の部分
の断面が円形にそれぞれ形成されると共に、その
全長に亘つて断面積が略一定に設定される。B. Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention provides a side branch type in which a branch pipe with a closed tip is connected in the middle of a gas passage pipe. In the silencer, the branch pipe has an elliptical cross section at a portion that should avoid contact with other equipment, a circular cross section at the remaining portion, and a cross-sectional area over its entire length. It is set approximately constant.
(2) 作用
分岐管の断面形状を、他の機器との接触を回避
すべき部分だけ変化させることにより、該機器と
の接触が容易に回避されるから、分岐管の取回し
の自由度が増加する。また分岐管はその全長に亘
つて断面積が略一定であるから、前述のように分
岐管の断面形状を一部変化させたにも拘わらず、
該管の消音効果が特別に低下する虞れはない。(2) Effect By changing the cross-sectional shape of the branch pipe only in the areas where contact with other equipment should be avoided, contact with the equipment can be easily avoided, increasing the flexibility in the routing of the branch pipe. increases. Furthermore, since the cross-sectional area of a branch pipe is approximately constant over its entire length, even though the cross-sectional shape of the branch pipe is partially changed as described above,
There is no risk that the silencing effect of the pipe will be particularly degraded.
また分岐管の基本的な断面形状を円形とするこ
とができるから丸パイプの使用が可能となり、ま
たその分岐管の、上記他の機器との接触を回避す
べき部分は、丸パイプの両側を扁平にするだけで
簡単に形成することができる。 In addition, since the basic cross-sectional shape of the branch pipe can be made circular, it is possible to use a round pipe, and the parts of the branch pipe that should avoid contact with the other equipment mentioned above should be placed on both sides of the round pipe. It can be easily formed by simply flattening it.
(3) 実施例
以下、図面により本発明を車両用内燃機関の吸
気係に適用したときの一実施例について説明する
と、先ず第１図および第２図において、エンジン
ルーム内で、図示しない機関本体に空気を供給す
るための気体通路管としての吸気管１の途中に
は、先端が閉塞した分岐管２が接続されており、
この分岐管２はラジエータ３側に延設される。す
なわち、分岐管２は吸気管１の途中の接続部４か
ら車両前方部に延び、さらにラジエータ３の後方
側面上部に沿つて配置され、支持部材５によつて
ラジエータ３に支持される。(3) Embodiment An embodiment in which the present invention is applied to the intake system of a vehicle internal combustion engine will be explained below with reference to the drawings. First, in FIGS. A branch pipe 2 with a closed tip is connected in the middle of an intake pipe 1 as a gas passage pipe for supplying air to the
This branch pipe 2 is extended to the radiator 3 side. That is, the branch pipe 2 extends from a connecting part 4 in the middle of the intake pipe 1 to the front part of the vehicle, is further arranged along the upper rear side surface of the radiator 3, and is supported by the radiator 3 by the support member 5.
ここで、ラジエータ３の後方側面には、ラジエ
ータフアン６およびコンデンサフアン７が配設さ
れる。また該側面上部には、キヤツプ８で閉塞さ
れる冷却水供給管９およびアツパホース１０を接
続するための接続管１１が後方に向けて突設され
ており、分岐管２はラジエータフアン６、コンデ
ンサフアン７、冷却水供給管９および接続管１１
を避けるように曲成される。 Here, a radiator fan 6 and a condenser fan 7 are disposed on the rear side surface of the radiator 3. In addition, a connecting pipe 11 for connecting a cooling water supply pipe 9 and an atsupahose 10, which are closed by the cap 8, is protruded rearward at the upper side of the side, and the branch pipe 2 is connected to a radiator fan 6, a condenser fan, etc. 7. Cooling water supply pipe 9 and connection pipe 11
It is curved to avoid.
すなわち、ラジエータ３の後方側において分岐
管２は、接続管１１の下方からラジエータフアン
６におけるシユラウド１２の上部に沿つて彎曲
し、さらに冷却水供給管９の下方を経てコンデン
サフアン７におけるシユラウド１３の上部に沿う
ように曲成される。 That is, on the rear side of the radiator 3, the branch pipe 2 curves from below the connecting pipe 11 along the upper part of the shroud 12 in the radiator fan 6, passes below the cooling water supply pipe 9, and then passes through the upper part of the shroud 13 in the condenser fan 7. It is curved along the top.
分岐管２の断面形状は基本的に円形であるが、
その一部、即ち他の機器との接触を回避すべき部
分２ａの断面形状は、第３図に明示したように楕
円状に形成される。尚、図示例では、上記部分２
ａは、ラジエータフアン６のシユラウド１２外周
に沿うように配設されており、該部分２ａを楕円
状に扁平化したことによつて、それと該シユラウ
ド１２等との干渉を容易に回避することができ
る。また分岐管２の断面積は、上記のように断面
形状を一部変化させたにも拘わらず、その全長に
亘つて略一定に設定されている。 The cross-sectional shape of the branch pipe 2 is basically circular, but
The cross-sectional shape of a portion thereof, that is, the portion 2a which should avoid contact with other equipment, is formed into an elliptical shape as clearly shown in FIG. In addition, in the illustrated example, the above portion 2
a is arranged along the outer periphery of the shroud 12 of the radiator fan 6, and by flattening the portion 2a into an elliptical shape, interference between it and the shroud 12, etc. can be easily avoided. can. Further, the cross-sectional area of the branch pipe 2 is set to be substantially constant over its entire length, although the cross-sectional shape is partially changed as described above.
次にこの実施例の作用について説明すると、分
岐管２の断面形状を部分的に変化させることによ
り、分岐管２を、ラジエータフアン６、コンデン
サフアン７、冷却水供給管９および接続管１１な
どとの接触を避けて配置することが容易となり、
分岐管２の配置設計が簡単となる。 Next, to explain the operation of this embodiment, by partially changing the cross-sectional shape of the branch pipe 2, the branch pipe 2 can be used as a radiator fan 6, a condenser fan 7, a cooling water supply pipe 9, a connecting pipe 11, etc. This makes it easier to place the device while avoiding contact with the
The layout design of the branch pipe 2 becomes easy.
また分岐管２はその一部の断面形状を楕円状、
残余の断面形状を円形としても、その全長に亘り
断面積が略一定であれば、断面形状が一定の円形
であるものと略同等の消音効果が得られること
を、本発明者らは実験により確認している。 In addition, the branch pipe 2 has a partially elliptical cross-sectional shape,
Through experiments, the present inventors have found that even if the remaining cross-sectional shape is circular, if the cross-sectional area is approximately constant over the entire length, the same silencing effect as when the cross-sectional shape is constant circular can be obtained. I've confirmed it.
第４図は、その実験結果を示すものであり、こ
のグラフにおいて、実線で示す曲線ａは、断面形
状を一定の円形とした比較例であり、また破線で
示す曲線ｂは、本発明に従つて断面積を全長に亘
つて略一定とし、しかも一部の断面形状を楕円
状、残余の断面形状を円形とした本発明適用例で
ある。この結果からも明らかなように、分岐管の
断面形状を楕円状に一部変化させても、断面積が
略一定であれば消音効果には殆ど影響がないもの
である。 FIG. 4 shows the experimental results. In this graph, a curve a shown by a solid line is a comparative example with a constant circular cross-sectional shape, and a curve b shown by a broken line is a comparative example according to the present invention. This is an application example of the present invention in which the cross-sectional area is substantially constant over the entire length, and a part of the cross-sectional shape is elliptical and the remaining cross-sectional shape is circular. As is clear from this result, even if the cross-sectional shape of the branch pipe is partially changed to an elliptical shape, as long as the cross-sectional area is substantially constant, the silencing effect is hardly affected.
以上の実施例では、車両用内燃機関の吸気系に
適用したときについて説明したが、本発明は騒音
低減のための共鳴型消音装置として広く実施され
得るものである。 In the above embodiments, the case where the present invention is applied to the intake system of a vehicle internal combustion engine has been described, but the present invention can be widely implemented as a resonance type muffler for noise reduction.
Ｃ 発明の効果
以上のように本発明によれば、気体通路管の途
中に、先端を閉塞した分岐管が接続されて成るサ
イドブランチ型消音装置において、前記分岐管
は、他の機器との接触を避けるべき部分の断面が
楕円状に、またその残余の部分の断面が円形にそ
れぞれ形成されると共に、その全長に亘つて断面
積が略一定に設定されるので、分岐管の断面形状
を基本的には円形とし、他の機器との接触を回避
すべき部分だけは楕円状に一部変化させることに
より、該機器との接触が容易に回避され、従つて
分岐管の取回しの自由度が増加し、その配置設計
が容易となる。また上記分岐管はその全長に亘つ
て断面積が略一定であることから、前述のように
分岐管の断面形状を楕円状に一部変化させたにも
拘わらず、該管の消音効果が特別に低下する虞れ
はない。C. Effects of the Invention As described above, according to the present invention, in a side branch type silencer in which a branch pipe with a closed end is connected in the middle of a gas passage pipe, the branch pipe does not come into contact with other equipment. The cross-section of the part that should be avoided is elliptical, and the cross-section of the remaining part is circular, and the cross-sectional area is set to be approximately constant over the entire length, so the cross-sectional shape of the branch pipe is basically the same. By making the main part circular, and changing only the part that should avoid contact with other equipment into an elliptical shape, contact with the equipment can be easily avoided, and therefore the branch pipe can be routed freely. This increases the efficiency and facilitates the layout design. Furthermore, since the cross-sectional area of the branch pipe is approximately constant over its entire length, even though the cross-sectional shape of the branch pipe has been partially changed to an elliptical shape as described above, the noise-reducing effect of the pipe is exceptional. There is no risk of this decline.
また特に分岐管の基本的な断面形状を円形とす
ることができるから丸パイプの使用が可能とな
り、またその分岐管の、上記他の機器との接触を
回避すべき部分は、丸パイプの両側に扁平にする
だけで簡単に形成できるから、分岐管の製作加工
が容易である。 In particular, since the basic cross-sectional shape of the branch pipe can be circular, it is possible to use a round pipe, and the parts of the branch pipe that should avoid contact with the other equipment mentioned above are on both sides of the round pipe. Since it can be easily formed by simply flattening it, manufacturing and processing of branch pipes is easy.
図面は本発明の一実施例を示すものであり、第
１図は平面図、第２図は第１図の矢視図、第３
図は第２図の−線断面図、第４図は実験結果
を示すグラフである、
１……気体通路管としての吸気管、２……分岐
管、２ａ……部分。
The drawings show one embodiment of the present invention, and FIG. 1 is a plan view, FIG. 2 is a view taken in the direction of the arrow in FIG. 1, and FIG.
The figure is a sectional view taken along the - line in FIG. 2, and FIG. 4 is a graph showing the experimental results. 1... Intake pipe as a gas passage pipe, 2... Branch pipe, 2a... section.
Claims (1)
２が接続されて成るサイドブランチ型消音装置に
おいて、前記分岐管２は、他の機器との接触を避
けるべき部分２ａの断面が楕円状に、またその残
余の部分の断面が円形にそれぞれ形成されると共
に、その全長に亘つて断面積が略一定に設定され
たことを特徴とする、サイドブランチ型消音装
置。1. In a side branch type silencer in which a branch pipe 2 with a closed end is connected in the middle of a gas passage 1, the branch pipe 2 has an elliptical cross section at a portion 2a that should avoid contact with other equipment. , and a side branch type silencer characterized in that each of the remaining portions has a circular cross section, and the cross sectional area is set to be substantially constant over the entire length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9191385A JPS61250373A (en) | 1985-04-29 | 1985-04-29 | Side branch type silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9191385A JPS61250373A (en) | 1985-04-29 | 1985-04-29 | Side branch type silencer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61250373A JPS61250373A (en) | 1986-11-07 |
| JPH025907B2 true JPH025907B2 (en) | 1990-02-06 |
Family
ID=14039820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9191385A Granted JPS61250373A (en) | 1985-04-29 | 1985-04-29 | Side branch type silencer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61250373A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2856122B2 (en) * | 1995-09-29 | 1999-02-10 | トヨタ自動車株式会社 | Intake cooling structure in engine room |
| JP5967058B2 (en) * | 2013-11-20 | 2016-08-10 | コベルコ建機株式会社 | Piping material for air cleaner |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3402785A (en) * | 1965-10-23 | 1968-09-24 | Walker Mfg Co | Muffler with resonance chambers for high and low frequencies |
| US3525419A (en) * | 1968-02-07 | 1970-08-25 | Cassel Thomas Richard | Exhaust system |
-
1985
- 1985-04-29 JP JP9191385A patent/JPS61250373A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61250373A (en) | 1986-11-07 |
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