JPS62174560A - Intake air duct structure for engine - Google Patents
Intake air duct structure for engineInfo
- Publication number
- JPS62174560A JPS62174560A JP1623586A JP1623586A JPS62174560A JP S62174560 A JPS62174560 A JP S62174560A JP 1623586 A JP1623586 A JP 1623586A JP 1623586 A JP1623586 A JP 1623586A JP S62174560 A JPS62174560 A JP S62174560A
- Authority
- JP
- Japan
- Prior art keywords
- sound absorbing
- absorbing material
- intake
- wall
- noise
- 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
- 239000011358 absorbing material Substances 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 abstract description 10
- 239000000428 dust Substances 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 abstract 5
- 238000000034 method Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000010073 coating (rubber) Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】 「産業上の利用分野」 本発明は、エンジンの吸気ダクト構造に関する。[Detailed description of the invention] "Industrial application field" The present invention relates to an engine intake duct structure.
「従来の技術」
エンジンの吸気ダクトにおいて、吸気により騒音が発生
するので、騒音を低減する必要があり、騒音低減装置と
して、例えば実開昭５５−１６７５６２号公報に示され
るものがある。この公報の装置においては、気化器とエ
アクリーナとを連結する吸気管に多数の小孔を設け、該
多数の小孔部の外側に吸音材を添着し、該吸音材を覆筒
で覆っている。``Prior Art'' Since noise is generated by intake air in the intake duct of an engine, it is necessary to reduce the noise. For example, there is a noise reduction device disclosed in Japanese Utility Model Application Laid-open No. 55-167562. In the device disclosed in this publication, a large number of small holes are provided in the intake pipe connecting the carburetor and the air cleaner, a sound absorbing material is attached to the outside of the large number of small holes, and the sound absorbing material is covered with a cover tube. .
「発明が解決しようとする問題点」
上記従来の騒音低減装置においては、騒音が吸音材で充
分に低減されず、騒音が吸気管、エアクリーナを介して
外部に漏出するという問題がある。"Problems to be Solved by the Invention" In the conventional noise reduction device described above, there is a problem in that the noise is not sufficiently reduced by the sound absorbing material, and the noise leaks to the outside via the intake pipe and the air cleaner.
本発明の目的は、吸気性能を維持しつつ吸気騒音を低減
することができるエンジンの吸気ダクト構造を提供する
ことにある。An object of the present invention is to provide an engine intake duct structure that can reduce intake noise while maintaining intake performance.
「問題点を解決するための手段」
本発明はエアクリーナの下流に設けられ、作用最大圧が
大気圧以下となるエンジンの吸気ダクト構造において、
それぞれ多孔板で形成された内壁と外壁を有し、両釜孔
板の間には、吸音材が配置されており、内壁の多孔板と
吸音材との間、及び、外壁の多孔板と吸音材との間の少
なくとも一方に、前記エアクリーナの濾材の目よりも小
さい目を有する濾材が介在されていることを特徴とする
。"Means for Solving the Problems" The present invention provides an intake duct structure for an engine that is provided downstream of an air cleaner and whose maximum operating pressure is below atmospheric pressure.
Each has an inner wall and an outer wall formed of perforated plates, and a sound-absorbing material is placed between the two pot-perforated plates. A filter medium having meshes smaller than those of the filter medium of the air cleaner is interposed in at least one of the spaces.
「作 用」
本発明においては、吸音材によりダクト内部の騒音を吸
収する。更に、内壁及び外壁を多孔板で形成し、かつ、
内壁の多孔板と吸音材との間及び外壁の多孔板と吸音材
との間の少なくとも一方にエアクリーナの濾材の目より
も小さい目を有する濾材を介在させて、ダクト内部への
ダストの侵入を防止するとともに、騒音をダクトの周囲
から大気に放散させて、騒音を低減している。"Function" In the present invention, noise inside the duct is absorbed by the sound absorbing material. Furthermore, the inner wall and the outer wall are formed of perforated plates, and
A filter medium having holes smaller than those of the filter medium of the air cleaner is interposed between at least one of the perforated plate on the inner wall and the sound absorbing material and between the perforated plate on the outer wall and the sound absorbing material to prevent dust from entering the inside of the duct. At the same time, the noise is reduced by dissipating it from around the duct into the atmosphere.
「実施例」
以下、図面に基づいて本発明の好適な実施例を説明する
。"Embodiments" Hereinafter, preferred embodiments of the present invention will be described based on the drawings.
実施例においては、本発明の吸気ダクト構造が圧力波過
給機（コンプレックス型過給機）付エンジンに適用され
ている。In the embodiment, the intake duct structure of the present invention is applied to an engine equipped with a pressure wave supercharger (complex type supercharger).
圧力波過給機は、排気の圧力波エネルギーを吸気に伝達
して吸気の過給を行うものであり、第１図に基づいて圧
力波過給機付エンジンを説明する。A pressure wave supercharger supercharges the intake air by transmitting the pressure wave energy of the exhaust gas to the intake air, and an engine with a pressure wave supercharger will be explained based on FIG. 1.
エンジン１０の吸気通路１２と排気通路１４には、圧力
波過給機１６が配設されており、圧力波過給機１６には
、更に、吸気通路１８、排気通路２０が設けられている
。なお、吸気通路１８、吸気通路１２は、それぞれ、１
次側、２次側の通路であり、また、符号２に２２．２３
は、それぞれ、共鳴サイレンサ、エアクリーナ、インタ
クーラを示す。前記圧力波過給機１６は、ケース２４内
に回転可能に支持され、多数の小室を形成する多数の隔
壁が放射状に配設されたロータ〈図示せず）を備え、該
ロータの回転に伴い小室内において排気通路１４からの
排気の圧力波エネルギーを吸気に伝達して吸気の過給を
行うようにしている。A pressure wave supercharger 16 is disposed in an intake passage 12 and an exhaust passage 14 of the engine 10, and the pressure wave supercharger 16 is further provided with an intake passage 18 and an exhaust passage 20. Note that the intake passage 18 and the intake passage 12 each have 1
It is the next side, secondary side passage, and the code 2 is 22.23
indicate a resonant silencer, air cleaner, and intercooler, respectively. The pressure wave supercharger 16 includes a rotor (not shown) that is rotatably supported within a case 24 and has a number of partition walls that form a number of small chambers arranged radially. In the small chamber, the pressure wave energy of the exhaust gas from the exhaust passage 14 is transmitted to the intake air to supercharge the intake air.
なお、圧力波過給機１６の詳細については、例えば実開
昭５８−１０．９５４７号公報を参照されたい。For details of the pressure wave supercharger 16, please refer to, for example, Japanese Utility Model Application No. 58-10.9547.
圧力波過給機１６は、高周波音を発生し、この高周波音
は、１次側吸気通路１８、エアクリーナ２２を介して大
気に伝播され、騒音となる。The pressure wave supercharger 16 generates high-frequency sound, and this high-frequency sound is propagated to the atmosphere via the primary side intake passage 18 and the air cleaner 22, and becomes noise.
そこで、実施例においては、本発明の吸気ダクト構造を
圧力波過給機１６の１次側吸気通路１８に適用して、高
周波成分を除去している。Therefore, in the embodiment, the intake duct structure of the present invention is applied to the primary intake passage 18 of the pressure wave supercharger 16 to remove high frequency components.
第２．３．４．５図には、本発明の実施例による吸気ダ
クト構造が示されており、第４．５図は、それぞれ、第
２図の部分Ａ、Ｂの拡大断面図である。2.3.4.5 shows an intake duct structure according to an embodiment of the present invention, and FIG. 4.5 is an enlarged sectional view of parts A and B in FIG. 2, respectively. .
第４図に基づいて、吸気通路１８の構造を説明すると、
吸気通路１８の内壁、外壁は、それぞれ、多孔板２６．
２８で形成されており、両釜孔板２６．２８の間には、
例えば１ＫＨｚ〜４ＫＨｚ用の吸音材３０が配置されて
いる。多孔板２６と吸音材３０との間、及び、多孔板２
８と吸音材３０との間には、それぞれ、Ｐ材３２．３４
が介在させられている。胛材３２．３４は、エアクリー
ナ２２の胛材（図示せず）の目よりも小さい目、例えば
２０μ以下である。The structure of the intake passage 18 will be explained based on FIG. 4.
The inner wall and outer wall of the intake passage 18 are each formed by a perforated plate 26.
28, and between both hook hole plates 26 and 28,
For example, a sound absorbing material 30 for 1 KHz to 4 KHz is arranged. Between the perforated plate 26 and the sound absorbing material 30 and the perforated plate 2
8 and the sound absorbing material 30, there are P materials 32 and 34, respectively.
is mediated. The laces 32 and 34 have a mesh smaller than that of the laces (not shown) of the air cleaner 22, for example, 20 μm or less.
従って、吸音材３０によりダクト内部の吸音効果が得ら
れる。更に、内壁２６から外壁２８まで通気性を持たせ
、かつ、Ｐ材３２．３４を介在させたことにより、吸音
材３０内へのダクト侵入を防止して吸音効果を維持する
一方、通路１８内へのダスト侵入を防止しつつ、大気へ
の音の放牧を図っているので、 吸気性能を維持しつつ
、吸気騒音の低減が達成できる。Therefore, the sound absorbing material 30 provides a sound absorbing effect inside the duct. Furthermore, by providing ventilation from the inner wall 26 to the outer wall 28 and interposing the P material 32, 34, the duct is prevented from entering the sound absorbing material 30 and the sound absorbing effect is maintained, while the inside of the passage 18 is The system prevents dust from entering the air while allowing sound to escape into the atmosphere, making it possible to reduce intake noise while maintaining intake performance.
なお、第３図において、孔３６は、外壁の多孔板２８の
孔を示してちり、また、第５図において、符号３８は、
シーラントを示す。In FIG. 3, holes 36 indicate holes in the perforated plate 28 on the outer wall, and in FIG. 5, reference numeral 38 indicates
Indicates sealant.
そして、第６図には、実施例による騒音と従来の騒音と
が各周波数について示されており、特に高周波領域で騒
音が低減されているのがわかる。FIG. 6 shows the noise according to the embodiment and the conventional noise for each frequency, and it can be seen that the noise is particularly reduced in the high frequency region.
次に、吸気通路１８の池の構造にいついて説明する。Next, the structure of the pond in the intake passage 18 will be explained.
従来の吸気通路１８は、第７図に示されるように、騒音
低減のために、吸音材４０を、内壁のパンチメタル４２
及び外壁のパンチメタル４４ではさんだ構造である。こ
のような構造では、吸音材４０のつぎ目４０ａから音が
もれてしまう。As shown in FIG. 7, in the conventional intake passage 18, a sound absorbing material 40 is attached to a punched metal 42 on the inner wall in order to reduce noise.
It has a structure in which it is sandwiched between punched metal 44 and the outer wall. In such a structure, sound leaks from the seam 40a of the sound absorbing material 40.
そこで、第８図に示されるように、吸音材を多層、例え
ば２層構造とし、第１の吸音材４６のつぎ目４６ａと第
２の吸音材４８のつぎ目４８ａとを互いにずらし、これ
により、音のもれを防止する。なお、吸音材４６．４８
として互いに吸音周波数の異なるものを用い、例えば、
吸音材４６として吸音領域１〜３ＫＨｚのもの、吸音材
４８として吸音領域３〜６ＫＨｚのものを使用すると、
広範囲の吸音領域（ＩＫＨｚ〜６ ＫＨｚ）にわたって
音圧を効果的に低減できる。なお、符号１００．１０２
は、戸材である。Therefore, as shown in FIG. 8, the sound-absorbing material is made into a multilayer structure, for example, a two-layer structure, and the seam 46a of the first sound-absorbing material 46 and the seam 48a of the second sound-absorbing material 48 are shifted from each other. , prevent sound leakage. In addition, sound absorbing material 46.48
For example, using sound absorbing frequencies that differ from each other,
When the sound absorbing material 46 has a sound absorption range of 1 to 3 KHz, and the sound absorbing material 48 has a sound absorption range of 3 to 6 KHz,
Sound pressure can be effectively reduced over a wide sound absorption range (IKHz to 6 KHz). In addition, the code 100.102
is the door material.
また、上記２つの実施例とも、胛材を、内壁と吸音材の
間および外壁と吸音材との間にそれぞれ設けているが、
どちらか−刃側のみに設けても吸音性能を維持しつつ吸
気騒音が低減できることは言うまでもない。In addition, in both of the above two embodiments, the fencing material is provided between the inner wall and the sound absorbing material and between the outer wall and the sound absorbing material, respectively.
It goes without saying that even if it is provided only on either side of the blade, intake noise can be reduced while maintaining sound absorption performance.
ただ、この場合、Ｐ材を外壁側に設けた方が、ダストに
よる吸音材の目づまりが防止でき、吸音材性能維持の面
でより好ましい。However, in this case, it is more preferable to provide the P material on the outer wall side, since this can prevent clogging of the sound absorbing material due to dust and maintains the performance of the sound absorbing material.
次に、第９．１０図には、２次側吸気通路１２の構造が
示されている。Next, FIG. 9.10 shows the structure of the secondary side intake passage 12.
コンプレックス過給機付エアクリーナの過圧エア用パイ
プ（２次側吸気通路１２）は、過給機の特性により、そ
の表面から高周波音が発生し、この音を低減する必要が
ある。そこで、アルミニウム鋳造にてつくったインテー
クパイプ５０に減衰、減音用のラバーコート５２を行う
。そして、生産性を高めるためには、インテークパイプ
５０にラバーコート５２を圧着又は一体化するのがよい
。Due to the characteristics of the supercharger, high-frequency sound is generated from the surface of the overpressure air pipe (secondary intake passage 12) of the air cleaner with a complex supercharger, and it is necessary to reduce this sound. Therefore, a rubber coating 52 for damping and sound reduction is applied to the intake pipe 50 made of aluminum casting. In order to increase productivity, it is preferable to press or integrate the rubber coat 52 onto the intake pipe 50.
この目的のために、アルミニウム鋳造にてつくったイン
テークパイプ５０をラバー５２の製作時の金型として使
用し、ラバー５２をインテークパイプ５０に一体化する
。For this purpose, the intake pipe 50 made by aluminum casting is used as a mold for manufacturing the rubber 52, and the rubber 52 is integrated into the intake pipe 50.
「発明の効果」
以上説明したように、本発明によれば、吸気性能を維持
しつつ吸気騒音を低減できる。"Effects of the Invention" As explained above, according to the present invention, intake noise can be reduced while maintaining intake performance.
第１図は、圧力波過給機付エンジンの概略構成図、
第２．３．４．５図は、本発明の実施例による吸気ダク
ト構造を示し、第２図は正面図、第３図は平面図、第４
図は第２図の部分Ａの拡大断面図、第５図は第２図の部
分Ｂの拡大断面図、第６図は、実施例による騒音と従来
の騒音とを各周波数について示すグラフ図、
第７図は、従来の吸気通路を示す断面図、第８図は、吸
音材２を２層構造とした吸気通路を示す断面図
第９図は、２次側吸気通路の説明図、
第１０図は、第９図のＸ−Ｘ断面図である。
１０・・・・・・エンジン、
１２・・・・・・２次側吸気通路、
１４・・・・・・排気通路、
１６・・・・・・圧力波過給機、
１８・・・・・・１次側吸気通路、
２０・・・・・・排気通路、
２２・・・・・・エアクリーナ、
２６．２８・・・・・・多孔板、
３０・・・・・・吸音材、
３２．３４・・・・・・胛材。
第１図
第２図
周波＃（Ｈｚ）
第７図 第８図
第９図
第１Ｑ図Fig. 1 is a schematic configuration diagram of an engine with a pressure wave supercharger, Fig. 2.3.4.5 shows an intake duct structure according to an embodiment of the present invention, Fig. 2 is a front view, and Fig. 3 is a plan view, 4th
2 is an enlarged sectional view of part A in FIG. 2, FIG. 5 is an enlarged sectional view of part B in FIG. 2, and FIG. 6 is a graph showing noise according to the embodiment and conventional noise at each frequency. FIG. 7 is a sectional view showing a conventional intake passage, FIG. 8 is a sectional view showing an intake passage with a two-layered sound absorbing material 2, and FIG. 9 is an explanatory diagram of the secondary intake passage. The figure is a sectional view taken along line XX in FIG. 9. 10... Engine, 12... Secondary intake passage, 14... Exhaust passage, 16... Pressure wave supercharger, 18... ... Primary side intake passage, 20 ... Exhaust passage, 22 ... Air cleaner, 26.28 ... Perforated plate, 30 ... Sound absorbing material, 32 ．３４・・・・・・胛 Material. Figure 1 Figure 2 Frequency # (Hz) Figure 7 Figure 8 Figure 9 Figure 1Q
Claims (1)
下となるエンジンの吸気ダクト構造において、 それぞれ多孔板で形成された内壁と外壁を有し、両多孔
板の間には、吸音材が配置されており、内壁の多孔板と
吸音材との間、及び、外壁の多孔板と吸音材との間の少
なくとも一方に、前記エアクリーナの濾材の目よりも小
さい目を有する濾材が介在されていることを特徴とする
エンジンの吸気ダクト構造。[Claims] In an engine intake duct structure that is provided downstream of an air cleaner and whose maximum operating pressure is below atmospheric pressure, it has an inner wall and an outer wall each formed of a perforated plate, and a sound absorbing member is provided between the perforated plates. A filter medium having holes smaller than the holes of the filter medium of the air cleaner is interposed between the perforated plate on the inner wall and the sound absorbing material and at least one between the perforated plate on the outer wall and the sound absorbing material. An engine intake duct structure characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1623586A JPS62174560A (en) | 1986-01-27 | 1986-01-27 | Intake air duct structure for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1623586A JPS62174560A (en) | 1986-01-27 | 1986-01-27 | Intake air duct structure for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62174560A true JPS62174560A (en) | 1987-07-31 |
Family
ID=11910890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1623586A Pending JPS62174560A (en) | 1986-01-27 | 1986-01-27 | Intake air duct structure for engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62174560A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0837238A2 (en) * | 1996-06-24 | 1998-04-22 | Westaflex Tubos Flexiveis Ltda. | Mouldable acoustic devices |
| JP2005256839A (en) * | 2004-03-12 | 2005-09-22 | Man B & W Diesel Gmbh | Reciprocating piston internal combustion engine |
| DE102008033802A1 (en) * | 2008-07-14 | 2010-01-28 | A. Kayser Automotive Systems Gmbh | Line element for intake side air guide for internal combustion engine, has mediums for sound proofing, which are formed by energy absorbing layer partly represented on extent area |
-
1986
- 1986-01-27 JP JP1623586A patent/JPS62174560A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0837238A2 (en) * | 1996-06-24 | 1998-04-22 | Westaflex Tubos Flexiveis Ltda. | Mouldable acoustic devices |
| EP0837238A3 (en) * | 1996-06-24 | 1998-10-28 | Westaflex Tubos Flexiveis Ltda. | Mouldable acoustic devices |
| JP2005256839A (en) * | 2004-03-12 | 2005-09-22 | Man B & W Diesel Gmbh | Reciprocating piston internal combustion engine |
| DE102008033802A1 (en) * | 2008-07-14 | 2010-01-28 | A. Kayser Automotive Systems Gmbh | Line element for intake side air guide for internal combustion engine, has mediums for sound proofing, which are formed by energy absorbing layer partly represented on extent area |
| DE102008033802B4 (en) * | 2008-07-14 | 2013-10-17 | A. Kayser Automotive Systems Gmbh | Suction line element for an internal combustion engine |
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