JP2001140628A - Rotary fin type silencer - Google Patents

Rotary fin type silencer

Info

Publication number
JP2001140628A
JP2001140628A JP32952399A JP32952399A JP2001140628A JP 2001140628 A JP2001140628 A JP 2001140628A JP 32952399 A JP32952399 A JP 32952399A JP 32952399 A JP32952399 A JP 32952399A JP 2001140628 A JP2001140628 A JP 2001140628A
Authority
JP
Japan
Prior art keywords
sound
fin
exhaust pipe
exhaust
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
Application number
JP32952399A
Other languages
Japanese (ja)
Inventor
Noboru Matsumoto
昇 松本
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.)
MATSUSHIYOU KK
Original Assignee
MATSUSHIYOU KK
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 MATSUSHIYOU KK filed Critical MATSUSHIYOU KK
Priority to JP32952399A priority Critical patent/JP2001140628A/en
Publication of JP2001140628A publication Critical patent/JP2001140628A/en
Pending legal-status Critical Current

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Landscapes

  • Exhaust Silencers (AREA)
  • Pipe Accessories (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

PROBLEM TO BE SOLVED: To suppress an arranging space, improve durability, and reduce costs, in a silencer for eliminating noise by utilizing reflection of sound wave and an interference action. SOLUTION: A noise eliminating cover 2 is disposed around an exhaust pipe 1. A noise eliminating space 4 in which a noise eliminating material 3 is filled is disposed in the noise eliminating cover 2. A noise eliminating fin 5 which is rotated by exhaust pressure in the exhaust pipe 1 is mounted in the noise eliminating cover 2. Exhaust noise is reflected around the exhaust pipe 1 through a rotating blade 5A of the noise eliminating fin 5. A part of reflecting noise is eliminated in the noise eliminating space 4, and a part of the reflecting noise is eliminated by interfering with exhaust noise.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、車両の内燃機関に
装着し、音波の反射と干渉作用を利用して排気音を消音
する回転フィン式消音器に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary fin type muffler mounted on an internal combustion engine of a vehicle and muffles exhaust sound by utilizing the reflection and interference of sound waves.

【0002】[0002]

【従来の技術】内燃機に装着して排気音を消音する消音
器には、排気ガスを膨脹させる膨脹室を設け、この膨脹
室に排気ガスを流通させる過程で消音する方法や、排気
管の周囲に吸音材を配設する方法などがある。これらの
消音効果は、いずれも膨脹室や吸音材を設けるスペース
の容積に比例するものである。
2. Description of the Related Art A muffler mounted on an internal combustion engine to muffle exhaust sound is provided with an expansion chamber for expanding exhaust gas, and a method for muffling the exhaust gas in the process of flowing the exhaust gas, and a method for reducing the noise around the exhaust pipe. There is a method of arranging a sound absorbing material. Each of these noise reduction effects is proportional to the volume of the space in which the expansion chamber and the sound absorbing material are provided.

【0003】一方、排気音に対し、排気音の圧力波と逆
位相の音波をスピーカーから出力し、これら排気音と逆
位相の音波との干渉作用で消音を行う消音装置が特開平
5-288032号公報、並びに特開平7-281677号公報に記載さ
れている。この種の消音装置は、排気管の排気口近傍に
スピーカーや圧力センサを設け、圧力センサで関知した
信号に応じてスピーカーから音波を出力させるコントロ
ーラーを備えた装置であった。
[0003] On the other hand, Japanese Patent Laid-Open No. H08-163191 discloses a muffler that outputs a sound wave having a phase opposite to that of the exhaust sound from a speaker in response to the exhaust sound, and cancels the sound by interference between the exhaust sound and the sound wave having the opposite phase.
It is described in Japanese Patent Application Laid-Open No. 5-288032 and Japanese Patent Application Laid-Open No. 7-281677. This type of muffler is a device provided with a speaker and a pressure sensor in the vicinity of an exhaust port of an exhaust pipe, and a controller for outputting sound waves from the speaker in accordance with a signal detected by the pressure sensor.

【0004】[0004]

【発明が解決しようとする課題】従来の膨脹室や吸音材
を配設する方法では、膨脹室や吸音材を設けるスペース
の容積に消音効果が比例するので、充分な消音効果を得
るには大きなスペースが求められるものであった。
In the conventional method of disposing the expansion chamber and the sound absorbing material, the noise reduction effect is proportional to the volume of the space in which the expansion chamber and the sound absorbing material are provided. Space was required.

【0005】一方、排気音の圧力波と逆位相の音波を出
力して干渉作用で消音する装置では、排気口近傍にスピ
ーカーや圧力センサを設ける必要があるので、耐久性に
課題を残すものであった。特に排気口では、高温の排気
ガスが排出されるので、スピーカーや圧力センサが高温
に晒されて損傷を受けやすい状態になっている。しか
も、圧力センサの信号に基づいてスピーカーから逆位相
の音波を出力させるコントローラーを備える必要もある
から、消音装置全体の製造コストが、前述した膨脹室や
吸音材を使用する方法に比べて高くなる不都合もある。
On the other hand, in a device that outputs a sound wave having a phase opposite to that of the exhaust sound and cancels the sound by interference, it is necessary to provide a speaker or a pressure sensor in the vicinity of the exhaust port. there were. In particular, since high-temperature exhaust gas is exhausted from the exhaust port, the speaker and the pressure sensor are exposed to high temperature and are easily damaged. Moreover, since it is necessary to provide a controller that outputs a sound wave of an opposite phase from the speaker based on the signal of the pressure sensor, the manufacturing cost of the entire silencer becomes higher than the above-described method using the expansion chamber and the sound absorbing material. There are inconveniences.

【0006】そこで、本発明は上述の課題を解消すべ
く、音波の反射と干渉作用を利用して消音する全く新し
い消音器を開発し、膨脹室や吸音材を使用する消音器と
比べて設置スペースが少なくて済み、しかも、逆位相の
音波を出力して干渉作用で消音する装置と比べて耐久性
に優れ、製造コストも安価に提供できる回転フィン式消
音器の提供を目的とするものである。
Therefore, in order to solve the above-mentioned problems, the present invention has developed a completely new silencer which silences by utilizing the reflection and interference of sound waves, and is installed in comparison with a silencer using an expansion chamber or a sound absorbing material. The purpose is to provide a rotating fin type silencer that requires less space, is more durable than a device that outputs sound waves of opposite phase and silences by interference, and can be manufactured at low cost. is there.

【0007】[0007]

【課題を解決するための手段】上述の目的を達成すべく
創出された本発明の第1の手段は、内燃機関に接続され
た排気管1に装着する消音器で、排気管1の周囲に消音
カバー2を設け、この消音カバー2の内部に消音材3を
充填した消音スペース4を設けると共に、排気管1内の
排気圧力で回転する消音フィン5を消音カバー2内の排
気管1に装着し、消音フィン5の回転する羽根5Aを介
して排気音を排気管1の周囲に反射させ、反射音の一部
を消音スペース4内で消音すると共に、反射音の一部を
排気音に干渉させて消音することにある。
A first means of the present invention created to achieve the above object is a muffler mounted on an exhaust pipe 1 connected to an internal combustion engine. A muffling cover 2 is provided, a muffling space 4 filled with a muffling material 3 is provided inside the muffling cover 2, and a muffling fin 5 that rotates by the exhaust pressure in the exhaust pipe 1 is attached to the exhaust pipe 1 in the muffling cover 2. Then, the exhaust sound is reflected around the exhaust pipe 1 through the rotating blades 5A of the sound deadening fins 5, and a part of the reflected sound is silenced in the sound deadening space 4, and a part of the reflected sound interferes with the exhaust sound. To mute the sound.

【0008】第2の手段は、消音スペース4を、排気管
1を中央に介して排気管1の対向する外側面に一対形成
し、一方の消音スペース4内に回転する前記消音フィン
5を収納するフィン収納部6を設け、排気管1の内部と
各消音スペース4内の消音材3との間に、多数の吸音孔
7Aを開けた吸音板7を介在したことにある。
The second means is to form a pair of silencing spaces 4 on the opposite outer side surfaces of the exhaust pipe 1 with the exhaust pipe 1 at the center, and to accommodate the rotating silencing fin 5 in one of the silencing spaces 4. A fin housing 6 is provided, and a sound absorbing plate 7 having a large number of sound absorbing holes 7A is interposed between the inside of the exhaust pipe 1 and the sound deadening material 3 in each sound deadening space 4.

【0009】第3の手段の消音フィン5は、排気管1の
直径と略同じ長さの羽根5Aを複数枚設けられ、前記フ
ィン収納部6と消音フィン5との間隔の増減で消音フィ
ン5の回転数を調整するものである。
The sound absorbing fin 5 of the third means is provided with a plurality of blades 5A having a length substantially equal to the diameter of the exhaust pipe 1. The sound absorbing fin 5 is provided by increasing or decreasing the interval between the fin housing 6 and the sound absorbing fin 5. This is for adjusting the rotation speed.

【0010】第4の手段の消音フィン5は、消音フィン
5の回転数を調整する回転調整用モーターを備えてい
る。
The silencing fin 5 of the fourth means has a rotation adjusting motor for adjusting the number of revolutions of the silencing fin 5.

【0011】第5の手段は、内燃機関に接続された排気
管1に装着する消音器で、排気管1の周囲に消音カバー
2を設け、排気管1内の排気圧力で回転する消音フィン
5を消音カバー2内の排気管1に装着し、消音フィン5
の回転する羽根5Aを介して排気音を排気管1の周囲に
反射させ、反射音の一部を排気音に干渉させて消音する
ことを課題解消のための手段とする。
Fifth means is a muffler mounted on an exhaust pipe 1 connected to an internal combustion engine. A muffler cover 2 is provided around the exhaust pipe 1, and a muffling fin 5 that rotates by the exhaust pressure in the exhaust pipe 1 is provided. Is attached to the exhaust pipe 1 in the muffling cover 2 and the muffling fins 5 are attached.
It is a means for solving the problem that the exhaust sound is reflected to the periphery of the exhaust pipe 1 via the rotating blades 5A of the above, and a part of the reflected sound interferes with the exhaust sound to mute the sound.

【0012】[0012]

【発明の実施の形態】以下、図面を参照して本発明の実
施の形態を詳細に説明する。
Embodiments of the present invention will be described below in detail with reference to the drawings.

【0013】図に示す符号1は、内燃機関に接続された
排気管である。本発明は、この排気管1の途中あるいは
末端に装着されるもので、排気管1の周囲に消音カバー
2を設ける。更に、この消音カバー2の内部に消音材3
を充填した消音スペース4を設けている(図1参照)。
この消音スペース4は、排気管1を中央に介して排気管
1の対向する外側面に一対形成している。また、排気管
1の内部と各消音スペース4内の消音材3との間には、
多数の吸音孔7Aを開けた吸音板7を介在している。
Reference numeral 1 shown in the figure is an exhaust pipe connected to the internal combustion engine. According to the present invention, a muffler cover 2 is provided around the exhaust pipe 1 so as to be attached to the exhaust pipe 1 in the middle or at the end thereof. Further, a silencing material 3 is provided inside the silencing cover 2.
Is provided (see FIG. 1).
The silencing space 4 is formed as a pair on the outer side surface of the exhaust pipe 1 facing the exhaust pipe 1 with the exhaust pipe 1 at the center. Also, between the inside of the exhaust pipe 1 and the muffling material 3 in each muffling space 4,
The sound absorbing plate 7 having many sound absorbing holes 7A is interposed.

【0014】符号5は排気管1内の排気圧力で回転する
消音フィンであり、この消音フィン5は、消音カバー2
内の排気管1に装着している。図示の消音フィン5は、
消音カバー2の一方の消音スペース4に収納されてい
る。この消音フィン5は、回転する羽根5Aを介して排
気音を排気管1の周囲に反射させるもので、反射時の消
音効果を上げるために、羽根5Aの反射面に凹部を形成
してもよい。そして、この羽根5Aによる反射音の一部
を消音スペース4内で消音すると共に、反射音の一部を
排気音に干渉させて消音するものである(図5参照)。
図示の羽根5Aは、排気管1の直径と略同じ長さの羽根
5Aを3枚設けた例を示しているが、羽根5Aの数は任
意に設定することができる。
Reference numeral 5 denotes a sound deadening fin which is rotated by the exhaust pressure in the exhaust pipe 1.
It is attached to the exhaust pipe 1 inside. The illustrated sound deadening fins 5
It is housed in one muffling space 4 of the muffling cover 2. The sound deadening fins 5 reflect the exhaust sound to the periphery of the exhaust pipe 1 via the rotating blades 5A. In order to enhance the sound deadening effect at the time of reflection, a concave portion may be formed on the reflection surface of the blades 5A. . Then, a part of the reflected sound by the blade 5A is silenced in the silencing space 4, and a part of the reflected sound is made to interfere with the exhaust sound to be silenced (see FIG. 5).
The illustrated blade 5A shows an example in which three blades 5A having substantially the same length as the diameter of the exhaust pipe 1 are provided, but the number of blades 5A can be set arbitrarily.

【0015】また、消音フィン5を収納するフィン収納
部6は、排気管1の口径に対して約倍の内径を有してい
るので、排気効率を阻害するおそれはない。更にこのフ
ィン収納部6と消音フィン5との間隔の増減を調整する
ことによって、消音フィン5の回転数を調整することが
可能になる。また、図示していないが、消音フィン5
に、消音フィン5の回転数を調整する回転調整用モータ
ーを設けることで、消音フィン5の回転数を何時でも任
意の回転数に調整することが可能になる。
Further, since the fin housing portion 6 for housing the sound deadening fins 5 has an inner diameter which is about twice as large as the diameter of the exhaust pipe 1, there is no possibility that the exhaust efficiency is hindered. Further, by adjusting the increase / decrease of the interval between the fin housing portion 6 and the sound deadening fin 5, the rotation speed of the sound deadening fin 5 can be adjusted. Also, although not shown, the sound deadening fins 5
In addition, by providing a rotation adjusting motor for adjusting the number of rotations of the silencing fin 5, the number of rotations of the silencing fin 5 can be adjusted to an arbitrary number of rotations at any time.

【0016】この消音フィン5によると、排気管1の排
気音を排気管1内の羽根5Aの角度によって各消音スペ
ース4や排気管1がわに反射させるものである。すなわ
ち、図1は、消音フィン5を設けた消音スペース4に対
向する消音スペース4に反射させた例を示す。この例で
は、多量の消音材3によって、反射音が効果的に消去さ
れる。
According to the silencing fins 5, the exhaust noise of the exhaust pipe 1 is reflected by the respective silencing spaces 4 and the exhaust pipe 1 depending on the angle of the blades 5 A in the exhaust pipe 1. That is, FIG. 1 shows an example in which the sound is reflected by the sound deadening space 4 opposite to the sound deadening space 4 in which the sound deadening fins 5 are provided. In this example, the reflected sound is effectively eliminated by a large amount of the silencing material 3.

【0017】図4は、消音フィン5を設けた消音スペー
ス4に反射させた例を示す。この例では、消音材3によ
って反射音が消去されると共に、回転する消音フィン5
やフィン収納部6を流通する排気ガス等による攪拌作用
によっても反射音が消去されるから、消音効果にもこれ
らの相乗効果が得られる。
FIG. 4 shows an example in which the sound is reflected by the sound deadening space 4 provided with the sound deadening fins 5. In this example, the reflected sound is eliminated by the silencing material 3 and the rotating silencing fin 5 is rotated.
The reflected sound is also eliminated by the agitating action of the exhaust gas flowing through the fin housing 6 and the like, so that a synergistic effect can be obtained in the noise reduction effect.

【0018】図5は、排気管1内の排気音を元の排気管
1方向に反射させた例を示す。この例では、排気音と反
射音との干渉作用によって最も高い消音効果が得られる
ものである。排気ガスは消音フィン5を回転させて排気
管1外部へ排出されるから排気効率を低下させるもので
はなく、排気音の音波のみが反射されるものである。ま
た、反射音の各反射方向によって夫々消音効果が得られ
るので、最終的に排気管1から大気中に排出される排気
音は、パルスを伴った歯切れの良い低音が静かに流れる
ものである。
FIG. 5 shows an example in which the exhaust sound in the exhaust pipe 1 is reflected toward the original exhaust pipe 1. In this example, the highest noise reduction effect is obtained by the interference between the exhaust sound and the reflected sound. The exhaust gas is exhausted to the outside of the exhaust pipe 1 by rotating the sound deadening fins 5, so that the exhaust gas does not lower the exhaust efficiency, but reflects only the sound wave of the exhaust sound. In addition, since the noise canceling effect is obtained in each of the reflection directions of the reflected sound, the exhaust sound finally discharged from the exhaust pipe 1 into the atmosphere is a crisp low tone accompanied by a pulse.

【0019】消音カバー2の内部に消音材3を充填した
消音スペース4を設けない場合は、強いパルスを伴った
より歯切れの良い重低音を響かせることができる。この
とき、羽根5Aの反射面に種々の凹部形成を設けること
で、排気音の強弱や音色を変化させることも可能であ
る。
When the silencing space 4 filled with the silencing material 3 is not provided in the silencing cover 2, a more crisp deep bass accompanied by a strong pulse can be produced. At this time, by providing various concave portions on the reflection surface of the blade 5A, it is possible to change the intensity and tone of the exhaust sound.

【0020】[0020]

【発明の効果】本発明は上述の如く構成したことにより
当初の目的を達成する。
According to the present invention, the original object is achieved by the above-mentioned structure.

【0021】すなわち、排気管1の周囲に消音カバー2
を設け、この消音カバー2の内部に消音材3を充填した
消音スペース4を設けると共に、排気管1内の排気圧力
で回転する消音フィン5を消音カバー2内の排気管1に
装着し、消音フィン5の回転する羽根5Aを介して排気
音を排気管1の周囲に反射させ、反射音の一部を消音ス
ペース4内で消音すると共に、反射音の一部を排気音に
干渉させて消音することによって、音波の反射と干渉作
用を利用して消音する全く新しい消音器を開発すること
に成功した。この結果、これまでの膨脹室や吸音材を使
用する消音器と比べて設置スペースを少なくすることを
可能にした。
That is, a muffling cover 2 is provided around the exhaust pipe 1.
A silencing space 4 filled with a silencing material 3 is provided inside the silencing cover 2, and a silencing fin 5 that rotates by the exhaust pressure in the exhaust pipe 1 is attached to the exhaust pipe 1 in the silencing cover 2. Exhaust sound is reflected around the exhaust pipe 1 through the rotating blades 5A of the fins 5, a part of the reflected sound is silenced in the silencing space 4, and a part of the reflected sound interferes with the exhaust sound. By doing so, we succeeded in developing a completely new silencer that silences using the reflection and interference of sound waves. As a result, it has become possible to reduce the installation space as compared with the conventional muffler using an expansion chamber or a sound absorbing material.

【0022】また、消音スペース4を、排気管1を中央
に介して排気管1の対向する外側面に一対形成し、一方
の消音スペース4内に回転する前記消音フィン5を収納
するフィン収納部6を設け、排気管1の内部と各消音ス
ペース4内の消音材3との間に、多数の吸音孔7Aを開
けた吸音板7を介在したことで、消音フィン5による反
射音を、消音スペース4内で効果的に消音することがで
きた。
Further, a pair of the silencing spaces 4 are formed on the opposing outer surfaces of the exhaust pipe 1 with the exhaust pipe 1 at the center, and a fin housing portion for accommodating the rotating silencing fin 5 in one of the silencing spaces 4. 6, and a sound absorbing plate 7 having a large number of sound absorbing holes 7 </ b> A interposed between the inside of the exhaust pipe 1 and the sound absorbing material 3 in each sound absorbing space 4, so that the sound reflected by the sound absorbing fins 5 can be reduced. The sound could be effectively silenced in the space 4.

【0023】更に、消音フィン5は、排気管1の直径と
略同じ長さの羽根5Aを複数枚設けられているので、排
気管1の内燃機関方向に反射させて得られる干渉作用に
よる消音効果を高めることができる。また、前記フィン
収納部6と消音フィン5との間隔の増減で消音フィン5
の回転数を調整するから、内燃機関の性質に対応した消
音を行うことができる。
Further, since the noise reduction fins 5 are provided with a plurality of blades 5A having a length substantially equal to the diameter of the exhaust pipe 1, the noise reduction effect due to the interference effect obtained by reflecting the exhaust pipe 1 in the direction of the internal combustion engine. Can be increased. Further, by increasing or decreasing the distance between the fin housing section 6 and the sound absorbing fin 5,
By adjusting the rotation speed of the internal combustion engine, noise can be suppressed corresponding to the characteristics of the internal combustion engine.

【0024】また、消音フィン5に、消音フィン5の回
転数を調整する回転調整用モーターを設けたことで、消
音フィン5の回転数を何時でも任意の回転数に調整する
ことが可能になり、排気音の強弱や音程の調整を行え
る。
Also, by providing a rotation adjusting motor for adjusting the number of rotations of the silencing fin 5, the number of rotations of the silencing fin 5 can be adjusted to an arbitrary number of rotations at any time. The user can adjust the intensity and pitch of the exhaust sound.

【0025】更に、排気管1の周囲に消音カバー2を設
け、排気管1内の排気圧力で回転する消音フィン5を消
音カバー2内の排気管1に装着し、消音カバー2の内部
に消音材3を充填した消音スペース4を設けない場合に
は、より強いパルスを伴った歯切れの良い重低音を響か
せることが可能になる。
Further, a muffling cover 2 is provided around the exhaust pipe 1, and a muffling fin 5 which rotates by the exhaust pressure in the muffler 1 is attached to the muffler 2 inside the muffler cover 2. When the silencing space 4 filled with the material 3 is not provided, a crisp deep bass accompanied by a stronger pulse can be produced.

【0026】このように、本発明によると、音波の反射
と干渉作用を利用して消音する全く新しい消音器を開発
することに成功し、設置スペースが少なくて済み、しか
も、耐久性に優れ、製造コストも安価に提供できるなど
といった産業上有益な種々の効果を奏するものである。
As described above, according to the present invention, a completely new silencer that silences by utilizing the reflection and interference of sound waves has been successfully developed, and requires a small installation space, and is excellent in durability. Various industrially useful effects such as a low production cost can be obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施例を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

【図2】本発明の一実施例を示す平断面図である。FIG. 2 is a plan sectional view showing one embodiment of the present invention.

【図3】本発明の一実施例を示す側断面図である。FIG. 3 is a side sectional view showing one embodiment of the present invention.

【図4】本発明の消音フィンによる反射状態の一実施例
を示す要部断面図である。
FIG. 4 is a cross-sectional view of a main part showing one embodiment of a reflection state by the sound deadening fin of the present invention.

【図5】本発明の消音フィンによる反射状態の他の実施
例を示す要部断面図である。
FIG. 5 is a cross-sectional view of a principal part showing another embodiment of the reflection state by the sound deadening fin of the present invention.

【符号の説明】[Explanation of symbols]

1 排気管 2 消音カバー 3 消音材 4 消音スペース 5 消音フィン 5A 羽根 6 フィン収納部 7 吸音板 7A 吸音孔 DESCRIPTION OF SYMBOLS 1 Exhaust pipe 2 Sound-absorbing cover 3 Sound-absorbing material 4 Sound-absorbing space 5 Sound-absorbing fin 5A Blade 6 Fin storage section 7 Sound-absorbing plate 7A Sound-absorbing hole

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 内燃機関に接続された排気管に装着する
消音器であって、排気管の周囲に消音カバーを設け、こ
の消音カバーの内部に消音材を充填した消音スペースを
設けると共に、排気管内の排気圧力で回転する消音フィ
ンを消音カバー内の排気管に装着し、消音フィンの回転
する羽根を介して排気音を排気管の周囲に反射させ、反
射音の一部を消音スペース内で消音すると共に、反射音
の一部を排気音に干渉させて消音することを特徴とする
回転フィン式消音器。
1. A muffler mounted on an exhaust pipe connected to an internal combustion engine, wherein a muffling cover is provided around the exhaust pipe, and a muffling space filled with a muffling material is provided inside the muffler cover. A noise reduction fin that rotates with the exhaust pressure inside the pipe is attached to the exhaust pipe inside the noise reduction cover, and the exhaust sound is reflected around the exhaust pipe through the rotating blades of the noise reduction fin, and part of the reflected sound is reduced in the noise reduction space. A rotating fin type silencer, which silences, and at the same time, silences part of the reflected sound by interfering with exhaust sound.
【請求項2】 前記消音スペースは、排気管を中央に介
して排気管の対向する外側面に一対形成され、一方の消
音スペース内に回転する前記消音フィンを収納するフィ
ン収納部を設け、排気管の内部と各消音スペース内の消
音材との間に、多数の吸音孔を開けた吸音板を介在した
請求項1記載の回転フィン式消音器。
2. A fin housing portion, which is formed in a pair on the outer side surface of the exhaust pipe facing the exhaust pipe with the exhaust pipe at the center, and has a fin housing portion for housing the rotating noise fin in one of the noise reduction spaces, 2. The rotary fin type silencer according to claim 1, wherein a sound absorbing plate having a large number of sound absorbing holes is interposed between the inside of the pipe and the sound absorbing material in each sound absorbing space.
【請求項3】 前記消音フィンは、排気管の直径と略同
じ長さの羽根を複数枚設けられ、前記フィン収納部と消
音フィンとの間隔の増減で消音フィンの回転数を調整す
る請求項1又は2記載の回転フィン式消音器。
3. The sound deadening fin is provided with a plurality of blades having a length substantially the same as the diameter of an exhaust pipe, and the number of rotations of the sound deadening fin is adjusted by increasing or decreasing the interval between the fin housing portion and the sound deadening fin. 3. The rotary fin silencer according to 1 or 2.
【請求項4】 前記消音フィンは、消音フィンの回転数
を調整する回転調整用モーターを備えた請求項1乃至3
いずれか記載の回転フィン式消音器。
4. The sound deadening fin includes a rotation adjusting motor for adjusting a rotation speed of the sound deadening fin.
The rotary fin silencer according to any of the above.
【請求項5】 内燃機関に接続された排気管に装着する
消音器であって、排気管の周囲に消音カバーを設け、排
気管内の排気圧力で回転する消音フィンを消音カバー内
の排気管に装着し、消音フィンの回転する羽根を介して
排気音を排気管の周囲に反射させ、反射音の一部を排気
音に干渉させて消音することを特徴とする回転フィン式
消音器。
5. A muffler attached to an exhaust pipe connected to an internal combustion engine, wherein a muffling cover is provided around the exhaust pipe, and a muffling fin that rotates by exhaust pressure in the exhaust pipe is attached to the exhaust pipe in the muffler cover. A rotating fin type silencer that is mounted and reflects exhaust sound to the surroundings of an exhaust pipe through rotating blades of the sound deadening fin, and part of the reflected sound interferes with the exhaust sound to muffle the sound.
JP32952399A 1999-11-19 1999-11-19 Rotary fin type silencer Pending JP2001140628A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32952399A JP2001140628A (en) 1999-11-19 1999-11-19 Rotary fin type silencer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32952399A JP2001140628A (en) 1999-11-19 1999-11-19 Rotary fin type silencer

Publications (1)

Publication Number Publication Date
JP2001140628A true JP2001140628A (en) 2001-05-22

Family

ID=18222332

Family Applications (1)

Application Number Title Priority Date Filing Date
JP32952399A Pending JP2001140628A (en) 1999-11-19 1999-11-19 Rotary fin type silencer

Country Status (1)

Country Link
JP (1) JP2001140628A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010005186A2 (en) * 2008-07-10 2010-01-14 Kang June-Gill Rotary muffler for internal combustion engine and internal combustion engine comprising the same
KR101481502B1 (en) * 2008-01-03 2015-01-13 동부대우전자 주식회사 Cooling Cycle with Pulsation Reduction Device
GB2577320A (en) * 2018-09-24 2020-03-25 Kompetenzzentrum Das Virtuelle Fahrzeug Rotating air flow duct silencer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101481502B1 (en) * 2008-01-03 2015-01-13 동부대우전자 주식회사 Cooling Cycle with Pulsation Reduction Device
WO2010005186A2 (en) * 2008-07-10 2010-01-14 Kang June-Gill Rotary muffler for internal combustion engine and internal combustion engine comprising the same
WO2010005186A3 (en) * 2008-07-10 2010-04-22 Kang June-Gill Rotary muffler for internal combustion engine and internal combustion engine comprising the same
KR100985150B1 (en) * 2008-07-10 2010-10-08 강준길 Muffler for internal combustion engine and internal combustion engine having the same
GB2577320A (en) * 2018-09-24 2020-03-25 Kompetenzzentrum Das Virtuelle Fahrzeug Rotating air flow duct silencer

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