JP2007100677A - Amplifier - Google Patents

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Publication number
JP2007100677A
JP2007100677A JP2005295410A JP2005295410A JP2007100677A JP 2007100677 A JP2007100677 A JP 2007100677A JP 2005295410 A JP2005295410 A JP 2005295410A JP 2005295410 A JP2005295410 A JP 2005295410A JP 2007100677 A JP2007100677 A JP 2007100677A
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hollow body
sound
hollow
branch pipes
intake
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JP2005295410A
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JP4626471B2 (en
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Satoru Sasaki
哲 佐々木
Hiroyuki Abe
寛之 阿部
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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Priority to JP2005295410A priority Critical patent/JP4626471B2/en
Priority to US11/528,244 priority patent/US7353791B2/en
Priority to CN 200610141082 priority patent/CN1945000B/en
Priority to EP06020875A priority patent/EP1772614A2/en
Publication of JP2007100677A publication Critical patent/JP2007100677A/en
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Publication of JP4626471B2 publication Critical patent/JP4626471B2/en
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    • Y02T10/146—

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  • Exhaust Silencers (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an amplifier capable of establishing a range of adjustable amplifying frequency (tone) wide without sucking outside air by the amplifier. <P>SOLUTION: This amplifier consists of a hollow pipe 7 connecting one end open part into an intake duct 4, a vibration plate 8 blocking another end opening part of the hollow pipe 7, and a second hollow body 9 connected to the hollow pipe 7 via the vibration plate 8. The second hollow body 9 consists of a communication part 20 which consists of a pipe connected to the hollow pipe 7 via the vibration plate 8 and two branch pipes 10, 11 branching off at another end part of the communication part 20. The two branch pipes 10, 11 arranged with keeping expansion direction mutually different. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、内燃機関の吸気系から発する音の音質向上を図るための増音装置に関するものである。   The present invention relates to a sound amplifying device for improving the sound quality of sound emitted from an intake system of an internal combustion engine.

自動車等の吸気系から発する音の音質向上を図るための従来の増音装置としては、例えば特許文献１に記載されているものがある。この増音装置は、吸気経路を形成する外気導入部の側壁に開口部を設け、この開口部とダッシュパネルとをフレキシブルチューブで連結することで、エンジン吸気音を効率よく居室に導入して、スポーティーなサウンドを演出するというものである。
特開２００４-２１８４５８号公報 As a conventional sound amplifying device for improving the sound quality of sound emitted from an intake system of an automobile or the like, for example, there is one described in Patent Document 1. This sound amplifying device is provided with an opening on the side wall of the outside air introduction part forming the intake path, and by connecting the opening and the dash panel with a flexible tube, the engine intake sound is efficiently introduced into the room, It is to produce a sporty sound.
JP 2004-218458 A

しかしながら、上記構成では、外気増入部が、フレキシブルチューブを通じて室内にも連通していることから、室内付近からも空気が吸い込まれてしまう。
また外気導入部とダッシュパネルとを接続するフレキシブルチューブが非常に長いため、吸気音の増音周波数(音色)の調整可能な範囲が狭くなってしまうという問題があった。
本発明は、上記のような点に着目してなされたもので、増音装置によって外気を吸い込むことが無く、かつ増音周波数(音色)の調整可能な範囲を広く設定できる増音装置を提供することを課題としている。 However, in the above configuration, since the outside air inflow portion communicates with the room through the flexible tube, air is also sucked from the vicinity of the room.
Also, since the flexible tube connecting the outside air introduction part and the dash panel is very long, there is a problem that the adjustable range of the sound increase frequency (tone color) of the intake sound is narrowed.
The present invention has been made paying attention to the above points, and provides a sound amplifying device that does not inhale outside air with the sound amplifying device and can set a wide range of adjustable sound frequency (tone). The challenge is to do.

上記課題を解決するために、本発明は、内燃機関への吸気経路に連通する第１中空体と、その第１中空体に連通する第２中空体と、上記第１中空体と第２中空体との接続部に介挿されて当該接続部の断面を閉塞すると共に面外方向に振動可能な振動部材と、を備え、
上記第２中空体は、外気と連通する複数の開口部を有することを特徴とする増音装置を提供するものである。 In order to solve the above problems, the present invention provides a first hollow body that communicates with an intake path to an internal combustion engine, a second hollow body that communicates with the first hollow body, the first hollow body, and a second hollow body. A vibration member that is inserted in a connection portion with the body to close a cross section of the connection portion and can vibrate in an out-of-plane direction,
The second hollow body provides a sound amplifying device having a plurality of openings communicating with outside air.

ここで、増音装置を介した吸い込みを防止するために、図７に示すような構成の増音装置が考えられる。すなわち、吸気経路４の途中に第１中空管７（第１中空体に相当）を連通し、その第１中空管７の他方の開口端部に、振動板８（振動部材に相当）を介して第２中空管２１（第２中空体に相当）を接続する構成である。
この装置構成では、振動板を介挿することで、増音装置を介して外気を吸い込むこと防止されるため、吸気通路の任意の場所に増音装置を装着することができる。また、第１中空体及び第２中空体で構成される２つの共鳴周波数付近において吸気通路内の内圧力を増幅して発音することができる。ただし、この仮想した増音装置では、２つの共鳴周波数の間の領域において増音作用を得ることが困難なおそれがある、という問題点が考えられる。
これに対し、本願発明においては、増音装置位置からの吸い込みを防止できることに合わせ、第２中空体に複数の開口端を設ける、つまり互いに異なる位置に開口する複数の開口部を有する第２中空体を採用することで、広い周波数帯域に渡って音の調整が可能となる。 Here, in order to prevent the suction through the sound amplifying device, a sound amplifying device having a configuration as shown in FIG. 7 can be considered. That is, a first hollow tube 7 (corresponding to a first hollow body) is communicated in the middle of the intake path 4, and a diaphragm 8 (corresponding to a vibration member) is connected to the other opening end of the first hollow tube 7. It is the structure which connects the 2nd hollow tube 21 (equivalent to a 2nd hollow body) through this.
In this device configuration, by inserting the diaphragm, it is possible to prevent outside air from being sucked through the sound amplifying device, so that the sound amplifying device can be mounted at an arbitrary place in the intake passage. In addition, the internal pressure in the intake passage can be amplified and sounded in the vicinity of two resonance frequencies constituted by the first hollow body and the second hollow body. However, in this virtual sound increase device, there is a problem that it may be difficult to obtain a sound increase effect in a region between two resonance frequencies.
On the other hand, in the present invention, in accordance with the fact that suction from the position of the sound amplifying device can be prevented, the second hollow body is provided with a plurality of open ends, that is, a second hollow having a plurality of openings that open at different positions. By adopting the body, it is possible to adjust the sound over a wide frequency band.

（第１実施形態）
次に、本発明に係る第１実施形態について図面を参照しつつ説明する。
図１は、第１実施形態における構成を示す図である。
まず構成について説明する。
図１に示すように、吸気経路を構成する吸気ダクト４の一端部が外気に開放され、他端部がサージタンク２及び各インテークマニホールド３を介して、エンジン１の各シリンダに連通している。上記吸気ダクト４の途中にはエアクリーナ６及びスロットルチャンバ５が介装されている。 (First embodiment)
Next, a first embodiment according to the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating a configuration according to the first embodiment.
First, the configuration will be described.
As shown in FIG. 1, one end of an intake duct 4 constituting an intake path is opened to the outside air, and the other end communicates with each cylinder of the engine 1 via a surge tank 2 and each intake manifold 3. . An air cleaner 6 and a throttle chamber 5 are interposed in the intake duct 4.

ここで、上記スロットルチャンバ５は、アクセルペダルの踏み込み量に応じてサージタンク２への通気量を増減する。また、エンジン１は、吸気動作に伴い、吸気ダクト４内に存在する気体に吸気脈動を発生させる加振源となり、上記吸気脈動が吸気音の音源となる。この吸気脈動は、吸気ダクト４内に存在する気体に発生する圧力変動であり、複数の周波数の吸気脈動から構成される。   Here, the throttle chamber 5 increases or decreases the ventilation amount to the surge tank 2 in accordance with the depression amount of the accelerator pedal. Further, the engine 1 becomes an excitation source for generating an intake pulsation in the gas existing in the intake duct 4 in accordance with the intake operation, and the intake pulsation becomes a sound source of the intake sound. The intake pulsation is a pressure fluctuation generated in the gas existing in the intake duct 4 and is composed of intake pulsations having a plurality of frequencies.

そして、本実施形態では、スロットルチャンバ５とエアクリーナ６との間に位置する吸気ダクト４の部分に対して、増音装置が接続されている。
本実施形態の増音装置は、一端開口部を吸気ダクト４内に接続する中空管７と、その中空管７の他端開口部を閉塞する振動板８と、その振動板８を介して当該中空管７に接続する第２中空体９とから構成される。ここで、上記中空管７が第１中空体を構成する。 In the present embodiment, a sound increasing device is connected to the portion of the intake duct 4 located between the throttle chamber 5 and the air cleaner 6.
The sound amplifying apparatus according to the present embodiment includes a hollow tube 7 having an opening at one end connected to the intake duct 4, a diaphragm 8 for closing the other end opening of the hollow tube 7, and the diaphragm 8. And a second hollow body 9 connected to the hollow tube 7. Here, the hollow tube 7 constitutes a first hollow body.

上記振動板８は、振動部材を構成し、内気圧の変動によって面外方向に振動するものであり、例えば弾性膜などから構成される。
上記第２中空体９は、振動板８を介して当該中空管７に接続する管体からなる連通部２０と、その連通部２０の他端部で分岐する２本の枝管１０，１１とで構成させる。その２本の枝管１０，１１の先端部１０ａ、１１ａはそれぞれ開放されていて、第２中空体９の開口部をそれぞれ形成している。その２本の枝管１０，１１は、互いにその延在方向を異にして配置されている。本実施形態では、各枝管１０，１１の先端部１０ａ、１１ａはともにエンジンルーム内に位置するが、その各枝管１０，１１の先端部１０ａ、１１ａの開口の向き及び位置が異なる。 The diaphragm 8 constitutes a vibrating member, vibrates in the out-of-plane direction due to fluctuations in internal pressure, and is made of an elastic film, for example.
The second hollow body 9 includes a communicating portion 20 formed of a tubular body connected to the hollow tube 7 via the diaphragm 8 and two branch tubes 10 and 11 branched at the other end of the communicating portion 20. And make up. The tip portions 10a and 11a of the two branch pipes 10 and 11 are opened to form openings of the second hollow body 9, respectively. The two branch pipes 10 and 11 are arranged with their extending directions different from each other. In this embodiment, although the front-end | tip parts 10a and 11a of each branch pipe 10 and 11 are located in an engine room, the direction and position of opening of the front-end | tip parts 10a and 11a of each branch pipe 10 and 11 differ.

次に、上記構成の作用効果について説明する。
エンジン１を加振源とする吸気脈動はインテークマニホールド３及びサージタンク２を介して吸気ダクト４内に伝播する。その吸気脈動が中空管７を介して振動板８を加振することで、吸気流入を防止しながら吸気脈動を下流側の第２中空体９に伝えることができる。その脈動伝播の過程において、吸気脈動は、中空管７と振動板８とで構成される第１共鳴周波数、及び第２中空体９と振動板８とで構成される第２共鳴周波数において増幅され、２つの枝管１０，１１の各先端開口部１０ａ、１１ａから放射される。
このとき各枝管１０，１１の各開口部は互いにエンジンルーム内の異なる場所に開口していることから、それぞれの開口位置から車室内までの音響伝達特性が異なる。このため、各開口部１０ａ、１１ａから放射された音はその異なる音響特性の影響を受けて車室内へ伝播される。 Next, the effect of the above configuration will be described.
Intake pulsation using the engine 1 as an excitation source propagates into the intake duct 4 via the intake manifold 3 and the surge tank 2. The intake pulsation vibrates the diaphragm 8 through the hollow tube 7, whereby the intake pulsation can be transmitted to the second hollow body 9 on the downstream side while preventing the intake air from flowing in. In the pulsation propagation process, the intake pulsation is amplified at the first resonance frequency constituted by the hollow tube 7 and the diaphragm 8 and at the second resonance frequency constituted by the second hollow body 9 and the diaphragm 8. Then, the two branch pipes 10 and 11 are radiated from the respective front end openings 10a and 11a.
At this time, since the openings of the branch pipes 10 and 11 are opened at different locations in the engine room, the sound transmission characteristics from the respective opening positions to the vehicle compartment are different. For this reason, the sound radiated from the openings 10a and 11a is propagated into the vehicle interior due to the influence of the different acoustic characteristics.

例えば、２つの共鳴周波数付近でより車室内へ音が伝わり易い位置に１方の枝管１０の開口部１０ａを配置し、逆に２つの共鳴周波数付近では車室内へ音が伝播し難いがその中間の周波数域では音が伝わり易い位置に他方の枝管１１の開口部１１ａを配置した場合には、本増音装置で増音した２つの共鳴周波数付近の脈動音は開口部１０ａ側から車室内に効率よく伝播され、また、本増音装置で共鳴作用を利用できない周波数帯域の脈動音は開口部１１ａから放射されることで他の帯域よりも効率よく車室内へ伝播することができる。この結果、車室内では２つの共鳴周波数付近およびその中間帯域の脈動音が効率良く聞こえるため、幅広い周波数帯域で吸気脈動増音効果が得られることになる。   For example, the opening 10a of one branch pipe 10 is arranged at a position where sound is more easily transmitted to the vehicle interior near two resonance frequencies. Conversely, sound hardly propagates to the vehicle interior near two resonance frequencies. When the opening 11a of the other branch pipe 11 is disposed at a position where sound is easily transmitted in the intermediate frequency range, the pulsation sound near the two resonance frequencies increased by the present sound increasing device is generated from the opening 10a side. A pulsating sound in a frequency band that can be efficiently propagated into the room and in which the resonance action cannot be used in the sound increasing device is radiated from the opening 11a, so that it can be propagated more efficiently into the vehicle compartment than in other bands. As a result, since the pulsation sound in the vicinity of the two resonance frequencies and in the middle band can be heard efficiently in the passenger compartment, the intake pulsation sound enhancement effect can be obtained in a wide frequency band.

以上のように、本発明に基づく本実施形態を採用すると、増音装置の設置によって室内付近から空気が吸い込まれたりすることが防止される。
また、中空管７や第２中空体９をコンパクトな構成としても、各開口部１０ａ、１１ａの位置などを調整することで、２つの共鳴周波数及び２つの共鳴周波数の間においても吸気脈動音増大が図られることから、増音できる周波数帯域が狭いということもなく、広い周波数帯域に渡ってスポーティーな吸気音を演出することができる。 As described above, when the present embodiment based on the present invention is adopted, it is possible to prevent air from being sucked in from the vicinity of the room due to the installation of the sound increase device.
Further, even if the hollow tube 7 and the second hollow body 9 are made compact, by adjusting the positions of the openings 10a and 11a, the intake pulsation sound is also generated between the two resonance frequencies and the two resonance frequencies. Since the increase is achieved, a sporty intake sound can be produced over a wide frequency band without the frequency band where the sound can be increased being narrow.

ここで、上記構成では、２つの枝管１０，１１の先端開口部１０ａ、１１ａを共にエンジンルーム内で開放する場合を例示しているが、これに限定されない。例えば、２つの開口部１０ａ、１１ａの１方または両方を、ダッシュパネル上部のエアボックス(カウルトップ内)やフェンダー内等に開口すれば、さらに吸気脈動音を効率的に車室内へ伝播することも可能である。   Here, although the case where both the front-end opening parts 10a and 11a of the two branch pipes 10 and 11 are open | released in an engine room is illustrated in the said structure, it is not limited to this. For example, if one or both of the two openings 10a and 11a are opened in the air box (in the cowl top) or the fender at the top of the dash panel, the intake pulsation sound can be more efficiently propagated into the vehicle interior. Is also possible.

また、上記実施形態では、分岐する枝管が２本の場合を例示しているが、３本以上の枝管を有しても良い。その複数の枝管の先端開口部の位置を異なるように配置する。
また、第１中空体を中空管７で構成する場合を例示しているが、管状に限定されない。例えば、第１中空体を、２つの開口部を有するボール形状など、吸気ダクト４に接続する開口部と第２中空体９に接続する開口部だけを有する閉じた（中空）空間が形成されていれば、その形状は限定されない。また、第２中空体９についても、管状の形状に限定されない。 Moreover, although the case where the number of the branch branches to branch is two is illustrated in the said embodiment, you may have three or more branch pipes. The positions of the tip openings of the plurality of branch pipes are arranged differently.
Moreover, although the case where the 1st hollow body is comprised with the hollow tube 7 is illustrated, it is not limited to a tubular shape. For example, a closed (hollow) space having only an opening connected to the intake duct 4 and an opening connected to the second hollow body 9, such as a ball shape having two openings, is formed in the first hollow body. If it is, the shape is not limited. Further, the second hollow body 9 is not limited to a tubular shape.

また、第１中空体に接続する第２中空体９は２以上あっても良い。
また、上記実施形態では、エアクリーナ６よりもエンジン１側に増音装置を設けた場合を例示しているが、エアクリーナ６よりも開放端側に増音装置を設けても良い。ただし、加振減であるエンジンに近い位置が好ましい。
また、目的とする音質などにあわせて、適宜、枝管の軸方向途中にも第３の開口を設けても良い。 Further, there may be two or more second hollow bodies 9 connected to the first hollow body.
Moreover, although the case where the sound increase device is provided on the engine 1 side with respect to the air cleaner 6 is illustrated in the above embodiment, the sound increase device may be provided on the open end side with respect to the air cleaner 6. However, a position close to the engine where vibration is reduced is preferable.
In addition, a third opening may be provided in the middle of the branch pipe in the axial direction as appropriate in accordance with the target sound quality and the like.

（第２実施形態）
次に、第２実施形態について図面を参照しつつ説明する。なお、上記実施形態と同様な部品等については同一の符号を付して説明する。
本実施形態の基本構成は、上記第１実施形態と同様であるが、図２に示すように、中空管７の長さを第１実施形態よりも長く設定したものである。例えば、二つの枝管１０，１１の長さの平均値と等しいか近づける。
その他の構成は、第１実施形態と同様である。
この構成では、中空管７の長さを二つの枝管１０，１１の長さの平均値と等しいか近づけるように設定することで、中空管７の共鳴周波数を、さらに第２中空体９の共鳴周波数に近づけることができる。この結果、その周波数付近の吸気脈動音をより増大させることができる。 (Second Embodiment)
Next, a second embodiment will be described with reference to the drawings. In addition, about the components similar to the said embodiment, the same code | symbol is attached | subjected and demonstrated.
The basic configuration of this embodiment is the same as that of the first embodiment, but as shown in FIG. 2, the length of the hollow tube 7 is set longer than that of the first embodiment. For example, it is equal to or close to the average value of the lengths of the two branch pipes 10 and 11.
Other configurations are the same as those of the first embodiment.
In this configuration, by setting the length of the hollow tube 7 to be equal to or close to the average value of the lengths of the two branch tubes 10 and 11, the resonance frequency of the hollow tube 7 is further increased to the second hollow body. It can approach 9 resonance frequencies. As a result, the intake pulsation sound near the frequency can be further increased.

（第３実施形態）
次に、第３実施形態について図面を参照しつつ説明する。なお、上記各実施形態と同様な部品等については同一の符号を付して説明する。
本実施形態の基本構成は、図３に示すように、上記第１実施形態と同様であるが、２本の枝管１０，１１の長さを変えたものである。
その他の構成は、第１実施形態と同様である。
この構成では、２本の枝管１０，１１の長さを変えることで、所望の音響伝達特性を得るための位置に開口部を設定する自由度が大きくなる。 (Third embodiment)
Next, a third embodiment will be described with reference to the drawings. Components similar to those in each of the above embodiments will be described with the same reference numerals.
As shown in FIG. 3, the basic configuration of the present embodiment is the same as that of the first embodiment, except that the lengths of the two branch pipes 10 and 11 are changed.
Other configurations are the same as those of the first embodiment.
In this configuration, by changing the lengths of the two branch pipes 10 and 11, the degree of freedom for setting the opening at a position for obtaining a desired acoustic transmission characteristic is increased.

（第４実施形態）
次に、第４実施形態について図面を参照しつつ説明する。なお、上記各実施形態と同様な部品等については同一の符号を付して説明する。
本実施形態の基本構成は、上記第２実施形態と同様であるが、図４に示すように、２本の枝管１０，１１の互いの断面積を変えたものである。
その他の構成は、第２実施形態と同様である。
この構成では、２つの枝管１０，１１の断面積を変えることで、所望の音響伝達特性を得るために開口部を任意の位置に設定することができると共に、それぞれの音響伝達特性に合わせて吸気脈動増音レベルを調節することができる。 (Fourth embodiment)
Next, a fourth embodiment will be described with reference to the drawings. Components similar to those in each of the above embodiments will be described with the same reference numerals.
The basic configuration of this embodiment is the same as that of the second embodiment, but the cross-sectional areas of the two branch pipes 10 and 11 are changed as shown in FIG.
Other configurations are the same as those of the second embodiment.
In this configuration, by changing the cross-sectional areas of the two branch pipes 10 and 11, the opening can be set at an arbitrary position in order to obtain a desired acoustic transmission characteristic, and in accordance with the respective acoustic transmission characteristics. The intake pulsation sound increase level can be adjusted.

（第５実施形態）
次に、第５実施形態について図面を参照しつつ説明する。なお、上記各実施形態と同様な部品等については同一の符号を付して説明する。
本実施形態の基本構成は、上記第２実施形態と同様であるが、図５に示すように、第２中空体９の構成が異なる。
すなわち、第２中空体９を１本の管体２１で構成し、第１の開口部を管体の先端部（管端）２１ａの開口で構成し、第２の開口部を管体の軸方向途中位置に形成した開口２１ｂで構成したものである。
その他の構成は、第２実施形態と同様である。
この構成では、第２中空体９が１本の管体２１だけで構成されるので、吸気脈動増音効果を低コストで実現することができる。また、レイアウト自由度を増やすこともできる。 (Fifth embodiment)
Next, a fifth embodiment will be described with reference to the drawings. Components similar to those in each of the above embodiments will be described with the same reference numerals.
The basic configuration of the present embodiment is the same as that of the second embodiment, but the configuration of the second hollow body 9 is different as shown in FIG.
That is, the second hollow body 9 is constituted by one tube body 21, the first opening is constituted by the opening of the distal end portion (tube end) 21 a of the tube body, and the second opening portion is the axis of the tube body. It consists of an opening 21b formed in the middle of the direction.
Other configurations are the same as those of the second embodiment.
In this structure, since the 2nd hollow body 9 is comprised only with the one pipe body 21, the intake pulsation sound increase effect can be implement | achieved at low cost. In addition, layout flexibility can be increased.

（第６実施形態）
次に、第６実施形態について図面を参照しつつ説明する。なお、上記各実施形態と同様な部品等については同一の符号を付して説明する。
本実施形態の基本構成は、上記第２実施形態と同様であるが、図６に示すように、第２中空体９の構成が異なる。
本実施形態の第２中空体９は、上記中空管７の先端部に、振動板８を介して、当該中空管７よりも断面積が大きな、大容積の中空部１４を接続し、その中空部１４に対して２つの枝管１０，１１を接続したものである。図６では、中空管７と同軸に第１の枝管１０を接続し、第２の枝管１１を中空管７の軸と直交する方向に向けて当該中空部に接続している。 (Sixth embodiment)
Next, a sixth embodiment will be described with reference to the drawings. Components similar to those in each of the above embodiments will be described with the same reference numerals.
The basic configuration of the present embodiment is the same as that of the second embodiment, but the configuration of the second hollow body 9 is different as shown in FIG.
The second hollow body 9 of the present embodiment connects a large volume hollow portion 14 having a larger cross-sectional area than the hollow tube 7 to the distal end portion of the hollow tube 7 via the diaphragm 8. Two branch pipes 10 and 11 are connected to the hollow portion 14. In FIG. 6, the first branch pipe 10 is connected coaxially with the hollow pipe 7, and the second branch pipe 11 is connected to the hollow portion in a direction orthogonal to the axis of the hollow pipe 7.

その他の構成は、上記第１実施形態と同様である。
第６実施形態を採用した場合には、第２実施形態と同一の共鳴周波数を得ようとした場合に、大容量の中空部１４の存在によって、第２実施形態よりも第２の枝管１１の長さを短くできることから、よりコンパクトな構造で吸気脈動増音効果が得られる。
ここで、上記各実施形態を適宜組み合わせて、目的の音質調整を図るようにしても良い。 Other configurations are the same as those in the first embodiment.
In the case where the sixth embodiment is adopted, when the same resonance frequency as that of the second embodiment is to be obtained, the presence of the large-capacity hollow portion 14 causes the second branch pipe 11 to be more than the second embodiment. Therefore, the intake pulsation sound enhancement effect can be obtained with a more compact structure.
Here, the above-described embodiments may be combined as appropriate to achieve the target sound quality adjustment.

本発明に基づく第１実施形態に係る増音装置の構成を説明する図である。It is a figure explaining the structure of the sound increase apparatus which concerns on 1st Embodiment based on this invention. 本発明に基づく第２実施形態に係る増音装置の構成を説明する図である。It is a figure explaining the structure of the sound increase apparatus which concerns on 2nd Embodiment based on this invention. 本発明に基づく第３実施形態に係る増音装置の構成を説明する図である。It is a figure explaining the structure of the sound increase apparatus which concerns on 3rd Embodiment based on this invention. 本発明に基づく第４実施形態に係る増音装置の構成を説明する図である。It is a figure explaining the structure of the sound increase apparatus which concerns on 4th Embodiment based on this invention. 本発明に基づく第５実施形態に係る増音装置の構成を説明する図である。It is a figure explaining the structure of the sound increase apparatus which concerns on 5th Embodiment based on this invention. 本発明に基づく第６実施形態に係る増音装置の構成を説明する図である。It is a figure explaining the structure of the sound increase apparatus which concerns on 6th Embodiment based on this invention. 仮想とする増音装置の構成を説明する図である。It is a figure explaining the structure of the sound increase apparatus made into a virtual.

符号の説明Explanation of symbols

１ エンジン
２ サージタンク
３ インテークマニホールド
４ 吸気ダクト
５ スロットルチャンバ
６ エアクリーナ
７ 中空管（第１中空体）
８ 振動板(弾性膜)
９ 第２中空体
１０、１１ 枝管
１０ａ、１１ａ 枝管の端部開口部
14 大容積の中空部
２０ 連通部
２１ 管体
２１ａ 端部開口部
２１ｂ 開口 1 Engine 2 Surge Tank 3 Intake Manifold 4 Intake Duct 5 Throttle Chamber 6 Air Cleaner 7 Hollow Tube (First Hollow Body)
8 Diaphragm (elastic film)
9 Second hollow body 10, 11 Branch pipe 10a, 11a End opening of branch pipe
14 Large volume hollow part 20 Communication part 21 Tubular body 21a End part opening part 21b Opening

Claims (5)

内燃機関への吸気経路に連通する第１中空体と、その第１中空体に連通する第２中空体と、上記第１中空体と第２中空体との接続部に介挿されて当該接続部の断面を閉塞すると共に面外方向に振動可能な振動部材と、を備え、
上記第２中空体は、外気と連通する複数の開口部を有することを特徴とする増音装置。 The first hollow body communicating with the intake path to the internal combustion engine, the second hollow body communicating with the first hollow body, and the connection between the first hollow body and the second hollow body. A vibration member that closes a cross section of the portion and can vibrate in an out-of-plane direction,
The second hollow body has a plurality of openings communicating with outside air. 上記第２中空体は、上記第１中空体に接続する連通部と、その連通部から分岐する複数の枝管とから構成され、その複数の枝管の各延在方向が異なることを特徴とする請求項１に記載した増音装置。   The second hollow body is composed of a communication part connected to the first hollow body and a plurality of branch pipes branched from the communication part, and each extending direction of the plurality of branch pipes is different. The sound amplifying device according to claim 1. 上記連通部は、第１中空体の断面積、若しくは上記分岐する各枝管の断面積の合計値よりも、大きな断面積を有する大容積の中空部であることを特徴とする請求項２に記載した増音装置。   3. The communication portion according to claim 2, wherein the communication portion is a large-volume hollow portion having a cross-sectional area larger than a cross-sectional area of the first hollow body or a total cross-sectional area of the branched branch pipes. The sound amplifying device described. 上記複数の開口部の１部は、枝管の軸方向途中位置に設けた開口であることを特徴とする請求項２又は請求項３に記載した増音装置。   4. The sound amplifying device according to claim 2, wherein a part of the plurality of openings is an opening provided at an intermediate position in the axial direction of the branch pipe. 上記第２中空体は、一端開口部を上記第１中空体に連通する中空管から構成され、上記複数の開口部は、その中空管の他方の管端及び軸方向途中の１又は２以上の位置で開口した開口から構成されることを特徴とする請求項１に記載した増音装置。   The second hollow body is constituted by a hollow tube having an opening at one end communicating with the first hollow body, and the plurality of openings are one end of the other end of the hollow tube and one or two in the axial direction. The sound amplifying device according to claim 1, wherein the sound increasing device is configured by an opening opened at the above position.
JP2005295410A 2005-10-07 2005-10-07 Sound increaser Expired - Fee Related JP4626471B2 (en)

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US11/528,244 US7353791B2 (en) 2005-10-07 2006-09-28 Sound increase apparatus
CN 200610141082 CN1945000B (en) 2005-10-07 2006-09-29 Sound increase apparatus
EP06020875A EP1772614A2 (en) 2005-10-07 2006-10-04 Sound increase apparatus

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