JP2007321724A - Intake noise emphasizing device - Google Patents

Intake noise emphasizing device Download PDF

Info

Publication number
JP2007321724A
JP2007321724A JP2006155945A JP2006155945A JP2007321724A JP 2007321724 A JP2007321724 A JP 2007321724A JP 2006155945 A JP2006155945 A JP 2006155945A JP 2006155945 A JP2006155945 A JP 2006155945A JP 2007321724 A JP2007321724 A JP 2007321724A
Authority
JP
Japan
Prior art keywords
intake
elastic membrane
frequency
elastic film
elastic
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.)
Granted
Application number
JP2006155945A
Other languages
Japanese (ja)
Other versions
JP4661695B2 (en
Inventor
Shinichi Takeuchi
慎一 竹内
Hiroshi Shimada
博 島田
Gakuyo Sasaoka
岳陽 笹岡
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP2006155945A priority Critical patent/JP4661695B2/en
Priority to DE602007011001T priority patent/DE602007011001D1/en
Priority to EP07109532A priority patent/EP1865187B1/en
Priority to CN2007101105797A priority patent/CN101086240B/en
Publication of JP2007321724A publication Critical patent/JP2007321724A/en
Priority to US12/911,938 priority patent/USRE42490E1/en
Application granted granted Critical
Publication of JP4661695B2 publication Critical patent/JP4661695B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10242Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10295Damping means, e.g. tranquillising chamber to dampen air oscillations
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10242Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10301Flexible, resilient, pivotally or movable parts; Membranes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10314Materials for intake systems
    • F02M35/10321Plastics; Composites; Rubbers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/104Intake manifolds
    • F02M35/112Intake manifolds for engines with cylinders all in one line
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1272Intake silencers ; Sound modulation, transmission or amplification using absorbing, damping, insulating or reflecting materials, e.g. porous foams, fibres, rubbers, fabrics, coatings or membranes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1294Amplifying, modulating, tuning or transmitting sound, e.g. directing sound to the passenger cabin; Sound modulation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/16Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
    • F02M35/161Arrangement of the air intake system in the engine compartment, e.g. with respect to the bonnet or the vehicle front face

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intake noise emphasizing device which generates powerful intake noise and improves a flexibility in layout. <P>SOLUTION: The intake noise emphasizing device is provided with: a communication pipe attached on an outer circumference surface of an intake duct forming an intake passage to an engine and communicating to the intake duct; and an elastic film member 16 closing the communication pipe and elastically deforming according to change of intake vacuum generated on gas in the intake duck and vibrating in a surface outward direction during intake process of the engine. The elastic film member 16 has a construction including three elastic film construction parts 30a to 30c divided by a groove 32 provided on a surface in the suction duct side of the elastic film member 16, each elastic film construction part 30a to 30c is formed in a shape an area of which is different from each other in a view from a thickness direction of the elastic film member 16 to make different resonance frequency of vibration in the surface outward direction of the elastic film member 16 of each elastic film construction part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、例えば、自動車等の吸気系から発生する吸気音の音質向上を図るための装置に関する。   The present invention relates to an apparatus for improving the quality of intake sound generated from an intake system of, for example, an automobile.

従来の吸気音強調装置としては、例えば、特許文献1に記載されているものがある。この吸気音強調装置は、互いに異なる共振周波数を持つ複数の吸気ダクトを有しており、加速時等、エンジンの高負荷時に、複数の吸気ダクトで吸気音を発生させることにより、迫力感のある吸気音を車室内に導入するものである。
特許第3613665号公報(第1図)
As a conventional intake sound enhancement device, for example, there is one described in Patent Document 1. This intake sound emphasizing device has a plurality of intake ducts having mutually different resonance frequencies, and has a sense of power by generating intake sounds in a plurality of intake ducts during high engine loads such as during acceleration. Intake sound is introduced into the passenger compartment.
Japanese Patent No. 3613665 (FIG. 1)

しかしながら、特許文献1に記載の吸気音強調装置は、複数の吸気ダクトを有する構成であるため、エンジンルーム内の空間に余裕が無い場合等、レイアウトの制限を受けてしまう場合があり、エンジンルーム内への配置が困難となるという問題が発生するおそれがある。
本発明は、上記のような問題点に着目してなされたもので、複数の吸気ダクトを必要とせずに複数の共振周波数を発生可能とすることにより、迫力感のある吸気音を発生可能とするとともに、レイアウトの自由度を向上可能な吸気音強調装置を提供することを課題とする。
However, since the intake sound enhancement device described in Patent Document 1 has a configuration having a plurality of intake ducts, there may be a case where the layout of the engine room is limited, such as when there is no room in the engine room. There is a possibility that a problem that it is difficult to arrange the inside of the inside may occur.
The present invention has been made paying attention to the above problems, and by generating a plurality of resonance frequencies without requiring a plurality of intake ducts, it is possible to generate a powerful intake sound. In addition, an object of the present invention is to provide an intake sound enhancement device capable of improving the degree of freedom of layout.

上記課題を解決するために、本発明は、エンジンへの吸気通路をなす吸気ダクトの外周面に取り付けられて前記吸気ダクトと連通する連通管と、当該連通管を閉塞し、且つ吸気負圧の変化に応じて弾性変形することにより面外方向へ振動する弾性膜部材と、を備える吸気音強調装置において、
前記弾性膜部材は、当該弾性膜部材の面外方向へ振動する共振周波数が互いに異なる少なくとも二つの弾性膜構成部を有することを特徴とする吸気音強調装置を提供するものである。
In order to solve the above-described problems, the present invention provides a communication pipe that is attached to an outer peripheral surface of an intake duct that forms an intake passage to an engine and communicates with the intake duct, closes the communication pipe, and is configured to reduce intake negative pressure. In an intake sound emphasizing device comprising: an elastic film member that vibrates in an out-of-plane direction by elastically deforming according to a change,
The elastic membrane member provides an intake sound emphasizing device having at least two elastic membrane components having different resonance frequencies that vibrate in an out-of-plane direction of the elastic membrane member.

本発明によれば、複数の吸気ダクトを必要とせずに複数の共振周波数を発生可能とすることにより、迫力感のある吸気音を発生可能とするとともに、レイアウトの自由度を向上可能となる。   According to the present invention, it is possible to generate a plurality of resonance frequencies without requiring a plurality of intake ducts, thereby generating a powerful intake sound and improving the flexibility of layout.

以下、本発明の実施形態について図面を参照しつつ説明する。
(第一実施形態)
(構成)
図1は、本実施形態の吸気音強調装置1を搭載した車両Cを示す図であり、図1(a)は車両Cを側方から見た状態を示す図、図1(b)は車両Cを上方から見た状態を示す図、図1(c)は車両Cを前方から見た状態を示す図である。
図1中に示すように、本実施形態の吸気音強調装置1は、車室2の前方に設けられるとともに、ダッシュパネル4によって車室2と隔離されたエンジンルーム6内に配置されており、エンジン8と連通する吸気ダクト10に備えられている。
Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
(Constitution)
FIG. 1 is a view showing a vehicle C equipped with an intake sound enhancement device 1 of the present embodiment, FIG. 1 (a) is a view showing the vehicle C viewed from the side, and FIG. FIG. 1C is a diagram illustrating a state in which C is viewed from above, and FIG. 1C is a diagram illustrating a state in which vehicle C is viewed from the front.
As shown in FIG. 1, the intake sound emphasizing device 1 of the present embodiment is provided in the front of the passenger compartment 2 and disposed in the engine compartment 6 separated from the passenger compartment 2 by the dash panel 4. An intake duct 10 communicating with the engine 8 is provided.

図2は、本実施形態の吸気音強調装置1の構成を示す図である。
図2中に示すように、本実施形態の吸気音強調装置1は、連通管12と、追加管14と、弾性膜部材16とを備えている。
連通管12は、円筒形状をなしており、内部に気体が存在する通気管によって形成された吸気ダクト10の外周面に、吸気ダクト10と連通して取り付けられている。
追加管14は、連通管12と同様、円筒形状をなしており、連通管12よりも長尺の管によって形成されている。追加管14の一方の開口端は、連通管12と連結されており、追加管14の他方の開口端は、外気中へ開放されている。
FIG. 2 is a diagram showing a configuration of the intake sound enhancement device 1 of the present embodiment.
As shown in FIG. 2, the intake sound enhancement device 1 of the present embodiment includes a communication pipe 12, an additional pipe 14, and an elastic film member 16.
The communication pipe 12 has a cylindrical shape, and is attached to the outer peripheral surface of the intake duct 10 formed by a vent pipe in which gas is present so as to communicate with the intake duct 10.
The additional pipe 14 has a cylindrical shape like the communication pipe 12, and is formed by a pipe longer than the communication pipe 12. One open end of the additional pipe 14 is connected to the communication pipe 12, and the other open end of the additional pipe 14 is open to the outside air.

弾性膜部材16は、例えば、ゴム等の弾性体によって円板状に形成されており、連通管12の内周面に取り付けられて、連通管12を閉塞している。また、弾性膜部材16は、エンジン8の吸気工程において吸気ダクト10内の気体に発生する吸気負圧の変化に応じて弾性変形することにより、弾性膜部材16の面外方向へ振動する。弾性膜部材16の詳細な構成については、後述する。   The elastic membrane member 16 is formed in a disk shape by an elastic body such as rubber, for example, and is attached to the inner peripheral surface of the communication pipe 12 to close the communication pipe 12. Further, the elastic membrane member 16 vibrates in the out-of-plane direction of the elastic membrane member 16 by elastically deforming in accordance with a change in intake negative pressure generated in the gas in the intake duct 10 in the intake process of the engine 8. The detailed configuration of the elastic film member 16 will be described later.

以下、吸気ダクト10及び吸気ダクト10と関連する部分の構成について説明する。
吸気ダクト10は、外気からエンジン8への吸気通路をなしており、ダストサイド側吸気ダクト18と、クリーンサイド側吸気ダクト20とから構成されている。
ダストサイド側吸気ダクト18の一方の開口端は、エアクリーナ22に連結されており、ダストサイド側吸気ダクト18の他方の開口端は、外気中に開放されている。
Hereinafter, the configuration of the intake duct 10 and portions related to the intake duct 10 will be described.
The intake duct 10 forms an intake passage from outside air to the engine 8 and includes a dust side intake duct 18 and a clean side intake duct 20.
One open end of the dust side intake duct 18 is connected to the air cleaner 22, and the other open end of the dust side intake duct 18 is open to the outside air.

クリーンサイド側吸気ダクト20は、スロットルチャンバ24を備えている。クリーンサイド側吸気ダクト20の一方の開口端は、エアクリーナ22に連結されており、クリーンサイド側吸気ダクト20の他方の開口端は、後述するサージタンク26及び各インテークマニホールド28を介して、エンジン8が有する各シリンダー(図示せず)に連結されている。
エアクリーナ22は、例えば、オイルフィルター等のフィルター部を有しており、吸気ダクト10の他方の開口端から流入した気体を、フィルター部を通過させることにより清浄化する。
The clean side intake duct 20 includes a throttle chamber 24. One open end of the clean side intake duct 20 is connected to the air cleaner 22, and the other open end of the clean side intake duct 20 is connected to the engine 8 via a surge tank 26 and each intake manifold 28 described later. Is connected to each cylinder (not shown).
The air cleaner 22 has a filter part such as an oil filter, for example, and cleans the gas flowing in from the other opening end of the intake duct 10 by passing through the filter part.

スロットルチャンバ24は、エアクリーナ22とサージタンク26との間に取り付けられ、アクセルペダル(図示せず)と連結されており、アクセルペダルの踏み込み量に応じて、エアクリーナ22からサージタンク26への通気量を増減させる。アクセルペダルの踏み込み量を減少させて、エアクリーナ22からサージタンク26への通気量を減少させると、エンジン8の回転数が低下するとともに、吸気ダクト10内の気体に発生する吸気負圧が減少する。また、アクセルペダルの踏み込み量を増加させて、エアクリーナ22からサージタンク26への通気量を増加させると、エンジン8の回転数が上昇するとともに、吸気ダクト10内の気体に発生する吸気負圧が増加する。   The throttle chamber 24 is attached between the air cleaner 22 and the surge tank 26 and is connected to an accelerator pedal (not shown). The amount of air flow from the air cleaner 22 to the surge tank 26 according to the amount of depression of the accelerator pedal. Increase or decrease. When the amount of depression of the accelerator pedal is reduced to reduce the amount of ventilation from the air cleaner 22 to the surge tank 26, the rotational speed of the engine 8 is reduced and the intake negative pressure generated in the gas in the intake duct 10 is reduced. . Further, when the amount of depression of the accelerator pedal is increased and the amount of ventilation from the air cleaner 22 to the surge tank 26 is increased, the rotational speed of the engine 8 is increased and the intake negative pressure generated in the gas in the intake duct 10 is increased. To increase.

エンジン8は、吸気工程において、ダストサイド側吸気ダクト18の他方の開口端から流入してクリーンサイド側吸気ダクト20内に存在する気体を、サージタンク26及び各インテークマニホールド28を介して、各シリンダー内へ吸気する。
また、エンジン8は、吸気動作に伴って、クリーンサイド側吸気ダクト20内に存在する気体に吸気脈動を発生させる圧力源をなしており、この吸気脈動が吸気音を構成する。
In the intake process, the engine 8 flows gas from the other opening end of the dust side intake duct 18 into the clean side intake duct 20 through each surge cylinder 26 and each intake manifold 28 to each cylinder. Inhale in.
Further, the engine 8 forms a pressure source for generating an intake pulsation in the gas existing in the clean side intake duct 20 in accordance with the intake operation, and the intake pulsation constitutes an intake sound.

ここで、エンジン8の吸気動作に伴って発生する吸気脈動は、クリーンサイド側吸気ダクト20内に存在する気体に発生する圧力変動であり、この圧力変動は、複数の周波数の圧力変動から構成されている。すなわち、エンジン8の吸気動作に伴って発生する吸気脈動は、複数の周波数の吸気脈動から構成されている。なお、本実施形態では、エンジン8として、六つのシリンダーを有する直列六気筒エンジンを例に挙げて説明するが、エンジン8の構成は、これに限定されるものではない。   Here, the intake air pulsation generated with the intake operation of the engine 8 is a pressure fluctuation generated in the gas existing in the clean side intake duct 20, and this pressure fluctuation is composed of pressure fluctuations of a plurality of frequencies. ing. That is, the intake pulsation generated in association with the intake operation of the engine 8 is composed of intake pulsations having a plurality of frequencies. In the present embodiment, an in-line six-cylinder engine having six cylinders will be described as an example of the engine 8, but the configuration of the engine 8 is not limited to this.

図3は、弾性膜部材16の詳細な構成を示す図である。
弾性膜部材16は、弾性膜部材16の厚さ方向から見て、三つの弾性膜構成部30a〜30cを有しており、各弾性膜構成部30a〜30cは、弾性膜部材16の吸気ダクト側の面に設けられた溝32によって分割されて、面積が互いに異なる形状に形成されている。具体的には、弾性膜構成部30aの面積Saは、弾性膜構成部30bの面積Sbよりも広く、弾性膜構成部30bの面積Sbは、弾性膜構成部30cの面積Scよりも広くなるように形成されている。すなわち、各弾性膜構成部30a〜30cは、それぞれ、Sa>Sb>Scの条件式が成立するように形成されている。
FIG. 3 is a diagram showing a detailed configuration of the elastic membrane member 16.
The elastic membrane member 16 has three elastic membrane constituent portions 30 a to 30 c when viewed from the thickness direction of the elastic membrane member 16, and each elastic membrane constituent portion 30 a to 30 c is an intake duct of the elastic membrane member 16. It is divided by the grooves 32 provided on the side surface, and is formed into shapes having different areas. Specifically, the area Sa of the elastic membrane component 30a is larger than the area Sb of the elastic membrane component 30b, and the area Sb of the elastic membrane component 30b is larger than the area Sc of the elastic membrane component 30c. Is formed. That is, each elastic membrane component 30a-30c is formed so that the conditional expression of Sa>Sb> Sc is satisfied.

ここで、各弾性膜構成部30a〜30cは、互いの面積が異なっているため、弾性膜部材16の面外方向へ振動する共振周波数が互いに異なっている。また、面積の広い弾性膜構成部30は、面積の狭い弾性膜構成部30と比較して、面外方向への振動を生じる共振周波数が低くなる。したがって、各弾性膜構成部30a〜30cは、弾性膜構成部30aの共振周波数を第一共振周波数f1、弾性膜構成部30bの共振周波数を第二共振周波数f2、弾性膜構成部30cの共振周波数を第三共振周波数f3とした場合に、f1<f2<f3の条件式が成立するように形成されている。   Here, since each elastic film component 30a-30c has a mutually different area, the resonance frequency which vibrates to the out-of-plane direction of the elastic film member 16 mutually differs. In addition, the elastic membrane constituting part 30 having a large area has a lower resonance frequency that causes vibration in the out-of-plane direction, compared to the elastic film constituting part 30 having a small area. Therefore, each elastic membrane component 30a-30c has a resonance frequency of the elastic membrane component 30a as the first resonance frequency f1, a resonance frequency of the elastic membrane component 30b as the second resonance frequency f2, and a resonance frequency of the elastic membrane component 30c. Is set so that the conditional expression f1 <f2 <f3 is satisfied.

また、各弾性膜構成部30a〜30cは、それぞれの共振周波数が、エンジン8の吸気動作に伴って発生する吸気脈動を構成する複数の周波数の吸気脈動のうち、選択した第一周波数の吸気脈動、第二周波数の吸気脈動及び第三周波数の吸気脈動の各周波数と一致する形状に形成されている。具体的には、弾性膜構成部30aの第一共振周波数f1は、第一周波数の吸気脈動の周波数と一致しており、弾性膜構成部30bの第二共振周波数f2は、第二周波数の吸気脈動の周波数と一致している。また、弾性膜構成部30cの第三共振周波数f3は、第三周波数の吸気脈動の周波数と一致している。   In addition, each of the elastic film constituting units 30a to 30c has an intake pulsation of a first frequency selected from among a plurality of intake pulsations whose resonance frequencies constitute an intake pulsation generated in accordance with an intake operation of the engine 8. In addition, it is formed in a shape that matches each frequency of the intake pulsation of the second frequency and the intake pulsation of the third frequency. Specifically, the first resonance frequency f1 of the elastic membrane component 30a matches the intake pulsation frequency of the first frequency, and the second resonance frequency f2 of the elastic membrane component 30b is the intake air of the second frequency. It matches the frequency of pulsation. In addition, the third resonance frequency f3 of the elastic membrane constituting part 30c matches the frequency of the intake pulsation of the third frequency.

ここで、第一周波数は第二周波数よりも低い周波数であり、第二周波数は第三周波数よりも低い周波数である。すなわち、第一周波数、第二周波数及び第三周波数は、第一周波数<第二周波数<第三周波数の条件式が成立する関係となっている。
第一周波数は、エンジンの回転数が、所定の回転数R1である場合に発生する吸気脈動を構成している周波数であり、第二周波数は、エンジンの回転数が、所定の回転数R2である場合に発生する吸気脈動を構成している周波数、第三周波数は、エンジンの回転数が、所定の回転数R3である場合に発生する吸気脈動を構成している周波数である。
Here, the first frequency is a frequency lower than the second frequency, and the second frequency is a frequency lower than the third frequency. In other words, the first frequency, the second frequency, and the third frequency have a relationship that satisfies the condition of the first frequency <the second frequency <the third frequency.
The first frequency is a frequency that constitutes an intake pulsation that occurs when the engine speed is a predetermined speed R1, and the second frequency is an engine speed that is a predetermined speed R2. The frequency constituting the intake pulsation that occurs in a certain case, the third frequency, is the frequency constituting the intake pulsation that occurs when the engine speed is the predetermined speed R3.

ここで、R1はR2よりも低い回転数であり、R2はR3よりも低い回転数である。すなわち、回転数R1、R2、R3は、R1<R2<R3の条件式が成立する関係となっている。
なお、上記のような溝32は、隣り合う二つの弾性膜構成部30間に形成されるとともに、これらの弾性膜構成部30と剛性が異なる剛性変化部を構成している。
Here, R1 is a rotational speed lower than R2, and R2 is a rotational speed lower than R3. That is, the rotational speeds R1, R2, and R3 have a relationship that satisfies the conditional expression of R1 <R2 <R3.
The groove 32 as described above is formed between two adjacent elastic membrane constituent portions 30 and constitutes a stiffness changing portion having a stiffness different from those of the elastic membrane constituent portions 30.

(動作)
次に、吸気音強調装置1の動作について説明する。
エンジン8を駆動させると、エンジン8の吸気動作に伴って発生する吸気脈動は、各インテークマニホールド28及びサージタンク26を介して、クリーンサイド側吸気ダクト20内に存在する気体に伝播する(図2参照)。
エンジン8を駆動させた状態で、アクセルペダルの踏み込み量を増加させて、エアクリーナ22からサージタンク26への通気量を増加させる(以下、加速時と記載する)と、エンジン8の回転数が上昇するとともに、吸気ダクト10内の気体に発生する吸気負圧が増加する(図2参照)。
(Operation)
Next, the operation of the intake sound enhancement device 1 will be described.
When the engine 8 is driven, the intake pulsation generated by the intake operation of the engine 8 is propagated to the gas existing in the clean side intake duct 20 via each intake manifold 28 and the surge tank 26 (FIG. 2). reference).
When the engine 8 is driven and the amount of depression of the accelerator pedal is increased to increase the air flow from the air cleaner 22 to the surge tank 26 (hereinafter referred to as acceleration), the engine 8 speed increases. In addition, the intake negative pressure generated in the gas in the intake duct 10 increases (see FIG. 2).

ここで、図4から図6を参照して、加速時における、各弾性膜構成部30a〜30cの動作について詳述する。
図4から図6は、加速時において、各弾性膜構成部30a〜30cが弾性膜部材の面外方向へ振動する状態を示す図である。図4はエンジンの回転数がR1である状態、図5はエンジンの回転数がR2である状態、図6はエンジンの回転数がR3である状態を示している。
エンジンの回転数がR1である状態では、エンジンの吸気動作に伴って発生する吸気脈動を構成する複数の周波数の吸気脈動のうち、第一周波数の吸気脈動が、連通管を介して弾性膜部材へ伝播される。
Here, with reference to FIG. 4 to FIG. 6, the operation of each elastic membrane constituting portion 30 a to 30 c during acceleration will be described in detail.
4 to 6 are views showing a state in which each elastic membrane constituting portion 30a to 30c vibrates in the out-of-plane direction of the elastic membrane member during acceleration. 4 shows a state where the engine speed is R1, FIG. 5 shows a state where the engine speed is R2, and FIG. 6 shows a state where the engine speed is R3.
In the state where the engine speed is R1, among the intake pulsations of the plurality of frequencies constituting the intake pulsation generated in accordance with the intake operation of the engine, the intake pulsation of the first frequency is an elastic film member via the communication pipe. Propagated to.

このとき、第一周波数の吸気脈動の周波数は、弾性膜構成部30aの第一共振周波数f1と一致しているため、図4中に示すように、各弾性膜構成部30a〜30cのうち、弾性膜構成部30aのみが、弾性膜部材の面外方向に振動する。弾性膜構成部30aが、弾性膜部材の面外方向に振動すると、第一周波数及び第一周波数付近の吸気脈動が増幅されるため、追加管の他方の開口端から、増音された吸気音が外気側へ放射される。   At this time, the frequency of the intake pulsation of the first frequency coincides with the first resonance frequency f1 of the elastic membrane constituting portion 30a, and therefore, among the elastic membrane constituting portions 30a to 30c, as shown in FIG. Only the elastic membrane component 30a vibrates in the out-of-plane direction of the elastic membrane member. When the elastic membrane component 30a vibrates in the out-of-plane direction of the elastic membrane member, the intake air pulsation near the first frequency and the first frequency is amplified, so that the increased intake sound from the other opening end of the additional pipe Is emitted to the outside air side.

アクセルペダルの踏み込み量を更に増加させた状態、すなわち、エンジンの回転数がR2である状態では、エンジンの吸気動作に伴って発生する吸気脈動を構成する複数の周波数の吸気脈動のうち、第二周波数の吸気脈動が、連通管を介して弾性膜部材へ伝播される。
このとき、第二周波数の吸気脈動の周波数は、弾性膜構成部30bの第二共振周波数f2と一致しているため、図5中に示すように、各弾性膜構成部30a〜30cのうち、弾性膜構成部30bのみが、弾性膜部材の面外方向に振動する。弾性膜構成部30bが、弾性膜部材の面外方向に振動すると、第二周波数及び第二周波数付近の吸気脈動が増幅されるため、追加管の他方の開口端から、増音された吸気音が外気側へ放射される。
In a state where the amount of depression of the accelerator pedal is further increased, that is, in a state where the engine speed is R2, the second of the intake pulsations of a plurality of frequencies constituting the intake pulsation generated by the intake operation of the engine. The intake pulsation of the frequency is propagated to the elastic membrane member through the communication pipe.
At this time, since the frequency of the intake pulsation of the second frequency coincides with the second resonance frequency f2 of the elastic membrane constituting portion 30b, as shown in FIG. 5, among the elastic membrane constituting portions 30a to 30c, Only the elastic membrane component 30b vibrates in the out-of-plane direction of the elastic membrane member. When the elastic membrane component 30b vibrates in the out-of-plane direction of the elastic membrane member, the intake air pulsation near the second frequency and the second frequency is amplified, so that the increased intake sound from the other opening end of the additional pipe Is emitted to the outside air side.

アクセルペダルの踏み込み量を更に増加させた状態、すなわち、エンジンの回転数がR3である状態では、エンジンの吸気動作に伴って発生する吸気脈動を構成する複数の周波数の吸気脈動のうち、第三周波数の吸気脈動が、連通管を介して弾性膜部材へ伝播される。
このとき、第三周波数の吸気脈動の周波数は、弾性膜構成部30cの第三共振周波数f3と一致しているため、図6中に示すように、各弾性膜構成部30a〜30cのうち、弾性膜構成部30cのみが、弾性膜部材の面外方向に振動する。弾性膜構成部30cが、弾性膜部材の面外方向に振動すると、第三周波数及び第三周波数付近の吸気脈動が増幅されるため、追加管の他方の開口端から、増音された吸気音が外気側へ放射される。
In a state where the amount of depression of the accelerator pedal is further increased, that is, in a state where the engine speed is R3, a third of the intake pulsations of a plurality of frequencies constituting the intake pulsation generated in association with the intake operation of the engine. The intake pulsation of the frequency is propagated to the elastic membrane member through the communication pipe.
At this time, since the frequency of the intake pulsation of the third frequency matches the third resonance frequency f3 of the elastic membrane constituting portion 30c, as shown in FIG. 6, among the elastic membrane constituting portions 30a to 30c, Only the elastic membrane component 30c vibrates in the out-of-plane direction of the elastic membrane member. When the elastic membrane component 30c vibrates in the out-of-plane direction of the elastic membrane member, the third frequency and the intake pulsation in the vicinity of the third frequency are amplified. Therefore, the increased intake sound from the other opening end of the additional pipe Is emitted to the outside air side.

したがって、加速時においては、共振周波数の異なる各弾性膜構成部30a〜30cが、それぞれ、エンジンの回転数の変化に応じて、弾性膜部材の面外方向に振動することとなる。このため、第一周波数の吸気脈動、第二周波数の吸気脈動及び第三周波数の吸気脈動が増幅されて、追加管14の他方の開口端から、増音された吸気音が外気側へ放射される(図2参照)。
追加管14の他方の開口端から増音された吸気音が外気側へ放射されると、この放射された吸気音は、ダッシュパネル4を介して車室2内に伝播されるため、迫力感のある吸気音が車室2内へ導入される(図1参照)。
Therefore, at the time of acceleration, the elastic film constituent parts 30a to 30c having different resonance frequencies respectively vibrate in the out-of-plane direction of the elastic film member in accordance with the change in the engine speed. For this reason, the intake pulsation of the first frequency, the intake pulsation of the second frequency, and the intake pulsation of the third frequency are amplified, and the increased intake sound is radiated from the other open end of the additional pipe 14 to the outside air side. (See FIG. 2).
When the intake sound increased from the other opening end of the additional pipe 14 is radiated to the outside air side, the radiated intake sound is propagated into the vehicle compartment 2 via the dash panel 4, and thus a sense of force The intake sound with the noise is introduced into the passenger compartment 2 (see FIG. 1).

(応用例)
なお、本実施形態の吸気音強調装置1では、三つの弾性膜構成部30a〜30cが、それぞれ、弾性膜部材の面外方向へ振動する共振周波数が互いに異なっている構成としたが、これに限定されるものではない。すなわち、三つの弾性膜構成部30a〜30cのうち、少なくとも二つの弾性膜構成部30が、弾性膜部材の面外方向へ振動する共振周波数が互いに異なっている構成であればよい。
(Application examples)
In addition, in the intake sound emphasizing device 1 of the present embodiment, the three elastic film constituting units 30a to 30c have different resonance frequencies that vibrate in the out-of-plane direction of the elastic film member. It is not limited. In other words, it is only necessary that at least two of the three elastic film constituent parts 30a to 30c have different resonance frequencies that vibrate in the out-of-plane direction of the elastic film member.

また、本実施形態の吸気音強調装置1では、三つの弾性膜構成部30a〜30cを、それぞれ、互いに異なる面積に形成することによって、弾性膜部材の面外方向へ振動する共振周波数が互いに異なっている構成としたが、これに限定されるものではない。すなわち、例えば、三つの弾性膜構成部30a〜30cを、同一面積に形成するとともに、それぞれ、剛性及び質量のうち少なくとも一方が互いに異なる構成とすることにより、弾性膜部材の面外方向へ振動する共振周波数が互いに異なっている構成としてもよい。ここで、例えば、剛性及び質量のうち少なくとも一方を向上させる弾性膜構成部30には、内部への芯材の配置や、リブ形成の加工等、弾性膜構成部30の厚さを大きくすることにより、その他の弾性膜構成部30と同一面積であっても、剛性及び質量のうち少なくとも一方が向上するようにする。この場合、各弾性膜構成部の剛性及び質量のうち少なくとも一方を、それぞれ、弾性膜部材の面外方向へ振動する共振周波数に応じた条件となるように設定することにより、各弾性膜構成部の共振周波数を、所望の共振周波数に設定することが可能となる。   Further, in the inspiratory sound emphasizing device 1 of the present embodiment, the three elastic film constituting portions 30a to 30c are formed in different areas, respectively, so that the resonance frequencies that vibrate in the out-of-plane direction of the elastic film member are different from each other. However, the present invention is not limited to this. That is, for example, the three elastic membrane constituent portions 30a to 30c are formed in the same area, and at least one of rigidity and mass is different from each other, thereby vibrating in the out-of-plane direction of the elastic membrane member. The resonance frequencies may be different from each other. Here, for example, in the elastic membrane constituent part 30 that improves at least one of rigidity and mass, the thickness of the elastic membrane constituent part 30 is increased, such as the arrangement of the core material inside and the processing of rib formation. Accordingly, at least one of rigidity and mass is improved even if it has the same area as that of the other elastic membrane constituting part 30. In this case, by setting at least one of the rigidity and mass of each elastic membrane component so as to satisfy the condition corresponding to the resonance frequency that vibrates in the out-of-plane direction of the elastic membrane member, Can be set to a desired resonance frequency.

また、本実施形態の吸気音強調装置1では、弾性膜部材16を、三つの弾性膜構成部30a〜30cを有する構成としたが、これに限定されるものではなく、弾性膜部材16を、二つの弾性膜構成部30を有する構成としてもよい。
また、本実施形態の吸気音強調装置1では、吸気音強調装置1が、車室2よりも前方に設けられたエンジンルーム6内に配置されている構成としたが、吸気音強調装置1を配置する場所は、これに限定されるものではない。すなわち、例えば、車両Cの構成が、エンジンルーム6が車室2よりも後方に設けられている構成である場合、吸気音強調装置1を配置する場所を、車室2よりも後方に設けられているエンジンルーム6内に配置してもよい。また、例えば、車両Cの構成が、エンジンルーム6が車室2よりも下方に設けられている構成である場合、吸気音強調装置1を配置する場所を、車室2よりも下方に設けられているエンジンルーム6内に配置してもよい。要は、吸気音強調装置1を配置する場所は、車両Cの構成、具体的には、エンジンルーム6の位置に応じて、適宜変更することが可能である。
Moreover, in the inspiratory sound emphasizing device 1 of the present embodiment, the elastic film member 16 is configured to have the three elastic film components 30a to 30c, but is not limited thereto, and the elastic film member 16 is It is good also as a structure which has the two elastic film | membrane structure parts 30. FIG.
Further, in the intake sound enhancement device 1 of the present embodiment, the intake sound enhancement device 1 is arranged in the engine room 6 provided in front of the vehicle compartment 2. The place to arrange is not limited to this. That is, for example, when the configuration of the vehicle C is a configuration in which the engine room 6 is provided behind the vehicle compartment 2, the place where the intake sound enhancement device 1 is disposed is provided behind the vehicle compartment 2. It may be arranged in the engine room 6. For example, when the configuration of the vehicle C is a configuration in which the engine room 6 is provided below the vehicle compartment 2, the place where the intake sound enhancement device 1 is disposed is provided below the vehicle compartment 2. It may be arranged in the engine room 6. In short, the place where the intake sound enhancement device 1 is arranged can be changed as appropriate according to the configuration of the vehicle C, specifically, the position of the engine room 6.

(第一実施形態の効果)
(1)本実施形態の吸気音強調装置では、弾性膜部材を、弾性膜部材の厚さ方向から見て、三つの弾性膜構成部を有する構成としており、各弾性膜構成部を、それぞれ、弾性膜部材の面外方向へ振動する共振周波数が互いに異なる構成としている。
このため、加速時においては、エンジンの回転数の変化に応じて、各弾性膜構成部が、弾性膜部材の面外方向に振動する。
したがって、エンジンの回転数の変化に応じて、第一周波数の吸気脈動、第二周波数及び第三周波数の吸気脈動が増幅されて、追加管の他方の開口端から、増音された吸気音が外気側へ放射される。放射された吸気音は、ダッシュパネルを介して車室内に伝播されるため、迫力感のある吸気音が車室内へ導入される。
(Effects of the first embodiment)
(1) In the inspiratory sound emphasizing device of the present embodiment, the elastic film member is configured to have three elastic film components when viewed from the thickness direction of the elastic film member, and each elastic film component is The resonance frequencies that vibrate in the out-of-plane direction of the elastic membrane member are different from each other.
For this reason, at the time of acceleration, each elastic membrane component vibrates in the out-of-plane direction of the elastic membrane member in accordance with a change in the engine speed.
Accordingly, the intake pulsation of the first frequency, the second frequency, and the third frequency are amplified according to the change in the engine speed, and the increased intake sound is generated from the other open end of the additional pipe. Radiated to the outside air side. Since the radiated intake sound is propagated into the vehicle interior via the dash panel, a powerful intake sound is introduced into the vehicle interior.

その結果、一つの弾性膜部材によって複数の共振周波数の吸気音を発生させることが可能となり、複数の吸気ダクトを必要とせずに、迫力感のある吸気音を発生させることが可能となる。また、複数の吸気ダクトを必要としない構成となるため、レイアウトの自由度を向上させることが可能となり、車体の大きさが異なる車両等、構成の異なる多種類の車両に適用可能となる。   As a result, it is possible to generate intake sound having a plurality of resonance frequencies by one elastic film member, and it is possible to generate a powerful intake sound without requiring a plurality of intake ducts. In addition, since the configuration does not require a plurality of intake ducts, it is possible to improve the degree of freedom of layout, and it can be applied to many types of vehicles having different configurations such as vehicles having different body sizes.

(2)また、本実施形態の吸気音強調装置では、弾性膜部材を、弾性膜部材の厚さ方向から見て三つの弾性膜構成部を有する構成としており、各弾性膜構成部を、面積が互いに異なる形状に形成することにより、弾性膜部材の面外方向へ振動する共振周波数が互いに異なる構成としている。
したがって、各弾性膜構成部の面積を、それぞれ、弾性膜部材の面外方向へ振動する共振周波数に応じた面積となるように設定することにより、各弾性膜構成部の共振周波数を、所望の共振周波数に設定することが可能となる。
その結果、各弾性膜構成部が弾性膜部材の面外方向へ振動する共振周波数を、複数の所望の周波数に設定することが可能となり、吸気音を強調可能な周波数帯域の範囲を拡げることが可能となるため、車室内へ導入される吸気音の音質を向上させることが可能となる。
(2) Moreover, in the inspiratory sound emphasizing device of the present embodiment, the elastic film member is configured to have three elastic film components when viewed from the thickness direction of the elastic film member, and each elastic film component has an area Are formed in different shapes, so that the resonance frequencies that vibrate in the out-of-plane direction of the elastic membrane member are different from each other.
Therefore, by setting the area of each elastic membrane component to be the area corresponding to the resonance frequency that vibrates in the out-of-plane direction of the elastic membrane member, the resonance frequency of each elastic membrane component is set to a desired value. The resonance frequency can be set.
As a result, the resonance frequency at which each elastic membrane component vibrates in the out-of-plane direction of the elastic membrane member can be set to a plurality of desired frequencies, and the frequency band range in which the intake sound can be emphasized can be expanded. Therefore, it is possible to improve the quality of the intake sound introduced into the vehicle interior.

(第二実施形態)
(構成)
次に、本発明の第二実施形態について説明する。
図7は、本実施形態の吸気音強調装置の構成を示す図であり、弾性膜部材16の構成を示す図である。
図7中に示すように、本実施形態の吸気音強調装置の構成は、弾性膜部材16の構成を除き、上述した第一実施形態と同様の構成となっている。すなわち、本実施形態の弾性膜部材16は、隣り合う二つの弾性膜構成部30間に形成されるとともに、これらの弾性膜構成部30と剛性が異なる剛性変化部34によって分割された、弾性膜部材16の厚さ方向から見て、四つの弾性膜構成部30a〜30dを有している。
(Second embodiment)
(Constitution)
Next, a second embodiment of the present invention will be described.
FIG. 7 is a diagram illustrating the configuration of the intake sound enhancement device of the present embodiment, and is a diagram illustrating the configuration of the elastic film member 16.
As shown in FIG. 7, the configuration of the intake sound emphasizing device of the present embodiment is the same as that of the first embodiment described above except for the configuration of the elastic film member 16. In other words, the elastic membrane member 16 of the present embodiment is formed between two adjacent elastic membrane constituent portions 30 and is divided by a stiffness changing portion 34 having a rigidity different from those of the elastic membrane constituent portions 30. When viewed from the thickness direction of the member 16, it has four elastic film constituting portions 30 a to 30 d.

剛性変化部34は、円状剛性変化部36と、放射状剛性変化部38とを備えている。
円状剛性変化部36は、弾性膜部材16の吸気ダクト側の面に設けられた溝によって構成され、弾性膜部材16のうち、弾性膜部材16の中央を含む部分を包囲する形状に形成されており、全体として真円形状または楕円形状をなしている。なお、本実施形態では、円状剛性変化部36によって包囲された部分を、弾性膜構成部30dと記載して説明する。
The stiffness changing portion 34 includes a circular stiffness changing portion 36 and a radial stiffness changing portion 38.
The circular stiffness changing portion 36 is configured by a groove provided on the surface of the elastic membrane member 16 on the intake duct side, and is formed in a shape surrounding the portion of the elastic membrane member 16 including the center of the elastic membrane member 16. As a whole, it has a perfect circular shape or an elliptical shape. In the present embodiment, the portion surrounded by the circular stiffness changing portion 36 will be described as an elastic membrane constituting portion 30d.

放射状剛性変化部38は、円状剛性変化部36と同様に、弾性膜部材16の吸気ダクト側の面に設けられた溝によって構成され、円状剛性変化部36から弾性膜部材16の外周部へ向けて延在しており、円状剛性変化部36が包囲する部分以外を複数に分割する。なお、本実施形態では、放射状剛性変化部38を、それぞれ、円状剛性変化部36から弾性膜部材16の外周部へ向けて延在する三つの放射状剛性変化部38a〜38cから構成した場合を例にあげて説明する。また、本実施形態では、三つの放射状剛性変化部38a〜38cによって分割された三つの弾性膜構成部30を、それぞれ、弾性膜構成部30a〜30cと記載して説明する。   Similarly to the circular stiffness changing portion 36, the radial stiffness changing portion 38 is configured by a groove provided on the surface of the elastic membrane member 16 on the intake duct side, and the outer peripheral portion of the elastic membrane member 16 from the circular stiffness changing portion 36. The portion other than the portion surrounded by the circular stiffness changing portion 36 is divided into a plurality of portions. In the present embodiment, the radial stiffness changing portion 38 includes three radial stiffness changing portions 38a to 38c extending from the circular stiffness changing portion 36 toward the outer peripheral portion of the elastic membrane member 16, respectively. An example will be described. In the present embodiment, the three elastic membrane constituent portions 30 divided by the three radial stiffness changing portions 38a to 38c will be described as elastic membrane constituent portions 30a to 30c, respectively.

各弾性膜構成部30a〜30dは、剛性変化部34によって、面積が互いに異なる形状に形成されている。具体的には、弾性膜構成部30aの面積Saは、弾性膜構成部30bの面積Sbよりも広く、弾性膜構成部30bの面積Sbは、弾性膜構成部30cの面積Scよりも広く、弾性膜構成部30cの面積Scは、弾性膜構成部30dの面積Sdよりも広くなるように形成されている。すなわち、各弾性膜構成部30a〜30dは、それぞれ、Sa>Sb>Sc>Sdの条件式が成立するように形成されている。   The elastic membrane constituting portions 30a to 30d are formed in shapes having different areas by the rigidity changing portion 34. Specifically, the area Sa of the elastic membrane component 30a is larger than the area Sb of the elastic membrane component 30b, the area Sb of the elastic membrane component 30b is larger than the area Sc of the elastic membrane component 30c, and is elastic. The area Sc of the film constituent part 30c is formed to be larger than the area Sd of the elastic film constituent part 30d. In other words, the elastic film constituting portions 30a to 30d are formed so that the conditional expression Sa> Sb> Sc> Sd is satisfied.

また、各弾性膜構成部30a〜30dは、互いの面積が異なっているため、弾性膜部材16の面外方向へ振動する共振周波数が互いに異なっている。具体的には、弾性膜構成部30aの共振周波数を第一共振周波数f1、弾性膜構成部30bの共振周波数を第二共振周波数f2、弾性膜構成部30cの共振周波数を第三共振周波数f3、弾性膜構成部30dの共振周波数を第四共振周波数f4とすると、f1<f2<f3<f4の条件式が成立するように形成されている。   Further, since the elastic film constituent parts 30 a to 30 d have different areas, the resonance frequencies that vibrate in the out-of-plane direction of the elastic film member 16 are different from each other. Specifically, the resonance frequency of the elastic membrane component 30a is the first resonance frequency f1, the resonance frequency of the elastic membrane component 30b is the second resonance frequency f2, and the resonance frequency of the elastic membrane component 30c is the third resonance frequency f3. When the resonance frequency of the elastic membrane constituting part 30d is the fourth resonance frequency f4, the elastic film forming unit 30d is formed so that the conditional expression f1 <f2 <f3 <f4 is satisfied.

また、各弾性膜構成部30a〜30dは、それぞれの共振周波数が、エンジン8の吸気動作に伴って発生する吸気脈動を構成する複数の周波数の吸気脈動のうち、選択した第一周波数の吸気脈動の周波数、第二周波数の吸気脈動の周波数、第三周波数の吸気脈動の周波数及び第四周波数の吸気脈動の周波数と一致する形状に形成されている。具体的には、弾性膜構成部30aの第一共振周波数f1は、第一周波数の吸気脈動の周波数と一致しており、弾性膜構成部30bの第二共振周波数f2は、第二周波数の吸気脈動の周波数と一致している。また、弾性膜構成部30cの第三共振周波数f3は、第三周波数の吸気脈動の周波数と一致しており、弾性膜構成部30dの第四共振周波数f4は、第四周波数の吸気脈動の周波数と一致している。   In addition, each of the elastic film constituting units 30a to 30d has an intake pulsation of a first frequency selected from among a plurality of intake pulsations whose resonance frequencies constitute an intake pulsation generated in accordance with an intake operation of the engine 8. , The second frequency of intake pulsation, the third frequency of intake pulsation, and the fourth frequency of intake pulsation. Specifically, the first resonance frequency f1 of the elastic membrane component 30a matches the intake pulsation frequency of the first frequency, and the second resonance frequency f2 of the elastic membrane component 30b is the intake air of the second frequency. It matches the frequency of pulsation. Further, the third resonance frequency f3 of the elastic membrane constituting portion 30c matches the frequency of the intake pulsation of the third frequency, and the fourth resonance frequency f4 of the elastic membrane constituting portion 30d is the frequency of the intake pulsation of the fourth frequency. Is consistent with

ここで、第一周波数は第二周波数よりも低い周波数であり、第二周波数は第三周波数よりも低い周波数であり、第三周波数は第四周波数よりも低い周波数である。すなわち、第一周波数、第二周波数、第三周波数及び第四周波数は、第一周波数<第二周波数<第三周波数<第四周波数の条件式が成立する関係となっている。   Here, the first frequency is a frequency lower than the second frequency, the second frequency is a frequency lower than the third frequency, and the third frequency is a frequency lower than the fourth frequency. That is, the first frequency, the second frequency, the third frequency, and the fourth frequency are in a relationship that satisfies the following condition: first frequency <second frequency <third frequency <fourth frequency.

第一周波数は、エンジンの回転数が、所定の回転数R1である場合に発生する吸気脈動を構成している周波数であり、第二周波数は、エンジンの回転数が、所定の回転数R2である場合に発生する吸気脈動を構成している周波数である。また、第三周波数は、エンジンの回転数が、所定の回転数R3である場合に発生する吸気脈動を構成している周波数であり、第四周波数は、エンジンの回転数が、所定の回転数R4である場合に発生する吸気脈動を構成している周波数である。
ここで、R1はR2よりも低い回転数であり、R2はR3よりも低い回転数であり、R3はR4よりも低い回転数である。すなわち、回転数R1、R2、R3、R4は、R1<R2<R3<R4の条件式が成立する関係となっている。
その他の構成は、上述した第一実施形態と同様である。
The first frequency is a frequency that constitutes an intake pulsation that occurs when the engine speed is a predetermined speed R1, and the second frequency is an engine speed that is a predetermined speed R2. This is the frequency that constitutes the intake pulsation that occurs in some cases. The third frequency is a frequency that constitutes an intake pulsation that occurs when the engine speed is the predetermined speed R3, and the fourth frequency is the engine speed that is the predetermined speed. This is the frequency constituting the intake pulsation that occurs when R4.
Here, R1 is a rotational speed lower than R2, R2 is a rotational speed lower than R3, and R3 is a rotational speed lower than R4. That is, the rotational speeds R1, R2, R3, and R4 have a relationship that satisfies the conditional expression of R1 <R2 <R3 <R4.
Other configurations are the same as those of the first embodiment described above.

(動作)
次に、本実施形態の吸気音強調装置1の動作について説明する。なお、以下の説明では、弾性膜部材16以外の構成については、上述した第一実施形態と同様であるため、異なる部分の動作を中心に説明する。
エンジン8を駆動させると、エンジン8の吸気動作に伴って発生する吸気脈動は、各インテークマニホールド28及びサージタンク26を介して、クリーンサイド側吸気ダクト20内に存在する気体に伝播する(図2参照)。
エンジン8を駆動させた状態で、アクセルペダルの踏み込み量を増加させて、エアクリーナ22からサージタンク26への通気量を増加させる(以下、加速時と記載する)と、エンジン8の回転数が上昇するとともに、吸気ダクト10内の気体に発生する吸気負圧が増加する(図2参照)。
(Operation)
Next, the operation of the intake sound enhancement device 1 of the present embodiment will be described. In the following description, since the configuration other than the elastic film member 16 is the same as that of the first embodiment described above, the operation of different parts will be mainly described.
When the engine 8 is driven, the intake pulsation generated by the intake operation of the engine 8 is propagated to the gas existing in the clean side intake duct 20 via each intake manifold 28 and the surge tank 26 (FIG. 2). reference).
When the engine 8 is driven and the amount of depression of the accelerator pedal is increased to increase the air flow from the air cleaner 22 to the surge tank 26 (hereinafter referred to as acceleration), the engine 8 speed increases. In addition, the intake negative pressure generated in the gas in the intake duct 10 increases (see FIG. 2).

加速時において、エンジンの回転数がR1である状態では、エンジンの吸気動作に伴って発生する吸気脈動を構成する複数の周波数の吸気脈動のうち、第一周波数の吸気脈動が、連通管を介して弾性膜部材へ伝播される。
このとき、第一周波数の吸気脈動の周波数は、弾性膜構成部30aの第一共振周波数f1と一致しているため、各弾性膜構成部30a〜30dのうち、弾性膜構成部30aのみが、弾性膜部材の面外方向に振動する。弾性膜構成部30aが、弾性膜部材の面外方向に振動すると、第一周波数及び第一周波数付近の吸気脈動が増幅されるため、追加管の他方の開口端から、増音された吸気音が外気側へ放射される。
At the time of acceleration, in the state where the engine speed is R1, the intake pulsation of the first frequency among the intake pulsations of the plurality of frequencies constituting the intake pulsation generated in accordance with the intake operation of the engine passes through the communication pipe. Is transmitted to the elastic membrane member.
At this time, since the frequency of the intake air pulsation of the first frequency matches the first resonance frequency f1 of the elastic membrane component 30a, only the elastic membrane component 30a among the elastic membrane components 30a to 30d is Vibrates in the out-of-plane direction of the elastic membrane member. When the elastic membrane component 30a vibrates in the out-of-plane direction of the elastic membrane member, the intake air pulsation near the first frequency and the first frequency is amplified, so that the increased intake sound from the other opening end of the additional pipe Is emitted to the outside air side.

アクセルペダルの踏み込み量を更に増加させた状態、すなわち、エンジンの回転数がR2である状態では、エンジンの吸気動作に伴って発生する吸気脈動を構成する複数の周波数の吸気脈動のうち、第二周波数の吸気脈動が、連通管を介して弾性膜部材へ伝播される。
このとき、第二周波数の吸気脈動の周波数は、弾性膜構成部30bの第二共振周波数f2と一致しているため、各弾性膜構成部30a〜30dのうち、弾性膜構成部30bのみが、弾性膜部材の面外方向に振動する。弾性膜構成部30bが、弾性膜部材の面外方向に振動すると、第二周波数及び第二周波数付近の吸気脈動が増幅されるため、追加管の他方の開口端から、増音された吸気音が外気側へ放射される。
In a state where the amount of depression of the accelerator pedal is further increased, that is, in a state where the engine speed is R2, the second of the intake pulsations of a plurality of frequencies constituting the intake pulsation generated by the intake operation of the engine. The intake pulsation of the frequency is propagated to the elastic membrane member through the communication pipe.
At this time, since the frequency of the intake pulsation of the second frequency coincides with the second resonance frequency f2 of the elastic membrane constituent portion 30b, only the elastic membrane constituent portion 30b among the elastic membrane constituent portions 30a to 30d is Vibrates in the out-of-plane direction of the elastic membrane member. When the elastic membrane component 30b vibrates in the out-of-plane direction of the elastic membrane member, the intake air pulsation near the second frequency and the second frequency is amplified, so that the increased intake sound from the other opening end of the additional pipe Is emitted to the outside air side.

アクセルペダルの踏み込み量を更に増加させた状態、すなわち、エンジンの回転数がR3である状態では、エンジンの吸気動作に伴って発生する吸気脈動を構成する複数の周波数の吸気脈動のうち、第三周波数の吸気脈動が、連通管を介して弾性膜部材へ伝播される。
このとき、第三周波数の吸気脈動の周波数は、弾性膜構成部30cの第三共振周波数f3と一致しているため、各弾性膜構成部30a〜30dのうち、弾性膜構成部30cのみが、弾性膜部材の面外方向に振動する。弾性膜構成部30cが、弾性膜部材の面外方向に振動すると、第三周波数及び第三周波数付近の吸気脈動が増幅されるため、追加管の他方の開口端から、増音された吸気音が外気側へ放射される。
In a state where the amount of depression of the accelerator pedal is further increased, that is, in a state where the engine speed is R3, a third of the intake pulsations of a plurality of frequencies constituting the intake pulsation generated in association with the intake operation of the engine. The intake pulsation of the frequency is propagated to the elastic membrane member through the communication pipe.
At this time, since the frequency of the intake pulsation of the third frequency matches the third resonance frequency f3 of the elastic membrane component 30c, only the elastic membrane component 30c among the elastic membrane components 30a to 30d is Vibrates in the out-of-plane direction of the elastic membrane member. When the elastic membrane component 30c vibrates in the out-of-plane direction of the elastic membrane member, the third frequency and the intake pulsation in the vicinity of the third frequency are amplified. Therefore, the increased intake sound from the other opening end of the additional pipe Is emitted to the outside air side.

アクセルペダルの踏み込み量を更に増加させた状態、すなわち、エンジンの回転数がR4である状態では、エンジンの吸気動作に伴って発生する吸気脈動を構成する複数の周波数の吸気脈動のうち、第四周波数の吸気脈動が、連通管を介して弾性膜部材へ伝播される。
このとき、第四周波数の吸気脈動の周波数は、弾性膜構成部30dの第四共振周波数f4と一致しているため、各弾性膜構成部30a〜30dのうち、弾性膜構成部30dのみが、弾性膜部材の面外方向に振動する。弾性膜構成部30dが、弾性膜部材の面外方向に振動すると、第四周波数及び第四周波数付近の吸気脈動が増幅されるため、追加管の他方の開口端から、増音された吸気音が外気側へ放射される。
In a state where the amount of depression of the accelerator pedal is further increased, that is, in a state where the engine speed is R4, the fourth of the intake pulsations of a plurality of frequencies constituting the intake pulsation that occurs along with the intake operation of the engine. The intake pulsation of the frequency is propagated to the elastic membrane member through the communication pipe.
At this time, since the frequency of the intake pulsation of the fourth frequency coincides with the fourth resonance frequency f4 of the elastic membrane constituting portion 30d, only the elastic membrane constituting portion 30d among the elastic membrane constituting portions 30a to 30d is Vibrates in the out-of-plane direction of the elastic membrane member. When the elastic membrane component 30d vibrates in the out-of-plane direction of the elastic membrane member, the fourth frequency and the intake pulsation in the vicinity of the fourth frequency are amplified. Therefore, the increased intake sound from the other opening end of the additional pipe Is emitted to the outside air side.

したがって、加速時においては、共振周波数の異なる各弾性膜構成部30a〜30dが、それぞれ、エンジンの回転数の変化に応じて、弾性膜部材の面外方向に振動することとなる。このため、第一周波数の吸気脈動、第二周波数の吸気脈動、第三周波数の吸気脈動及び第四周波数の吸気脈動が増幅されて、追加管14の他方の開口端から、増音された吸気音が外気側へ放射される(図2参照)。
追加管14の他方の開口端から増音された吸気音が外気側へ放射されると、この放射された吸気音は、ダッシュパネル4を介して車室2内に伝播されるため、迫力感のある吸気音が車室2内へ導入される(図1参照)。
Therefore, at the time of acceleration, the elastic membrane constituent portions 30a to 30d having different resonance frequencies vibrate in the out-of-plane direction of the elastic membrane member in accordance with changes in the engine speed. For this reason, the intake pulsation of the first frequency, the intake pulsation of the second frequency, the intake pulsation of the third frequency, and the intake pulsation of the fourth frequency are amplified, and the intake air increased in sound from the other opening end of the additional pipe 14. Sound is emitted to the outside air side (see FIG. 2).
When the intake sound increased from the other opening end of the additional pipe 14 is radiated to the outside air side, the radiated intake sound is propagated into the vehicle compartment 2 via the dash panel 4, and thus a sense of force The intake sound with the noise is introduced into the passenger compartment 2 (see FIG. 1).

(応用例)
なお、本実施形態の吸気音強調装置1では、弾性膜部材16を、弾性膜部材16の厚さ方向から見て、四つの弾性膜構成部30a〜30dを有する構成としたが、これに限定されるものではない。すなわち、弾性膜部材16を、弾性膜部材16の厚さ方向から見て、五つ以上の弾性膜構成部30を有する構成としてもよい。この場合、弾性膜部材16を、弾性膜部材16の厚さ方向から見て、四つの弾性膜構成部30a〜30dを有する構成とした場合と比較して、より広範囲の周波数に対応することが可能となる。
(Application examples)
In the inspiratory sound emphasizing device 1 of the present embodiment, the elastic film member 16 is configured to have the four elastic film components 30a to 30d when viewed from the thickness direction of the elastic film member 16, but the present invention is not limited thereto. Is not to be done. That is, the elastic membrane member 16 may have a configuration having five or more elastic membrane constituent portions 30 when viewed from the thickness direction of the elastic membrane member 16. In this case, when the elastic film member 16 is viewed from the thickness direction of the elastic film member 16, the elastic film member 16 can correspond to a wider range of frequencies as compared with the case where the elastic film member 16 includes four elastic film components 30 a to 30 d. It becomes possible.

(第二実施形態の効果)
(1)本実施形態の吸気音強調装置では、弾性膜部材が、弾性膜部材の厚さ方向から見て、四つの弾性膜構成部を有しており、各弾性膜構成部を、面積が互いに異なる形状に形成することにより、弾性膜部材の面外方向へ振動する共振周波数が互いに異なる構成としている。
したがって、各弾性膜構成部の面積を、それぞれ、弾性膜部材の面外方向へ振動する共振周波数に応じた面積となるように設定することにより、各弾性膜構成部の共振周波数を、所望の共振周波数に設定することが可能となる。
その結果、上述した第一実施形態の吸気音強調装置、すなわち、弾性膜部材が、弾性膜部材の厚さ方向から見て、三つの弾性膜構成部を有して吸気音強調装置と比較して、吸気音を強調可能な周波数帯域の範囲を、更に拡げることが可能となるため、車室内へ導入される吸気音の音質を向上させることが可能となる。
(Effect of the second embodiment)
(1) In the inspiratory sound emphasizing device of the present embodiment, the elastic membrane member has four elastic membrane constituent portions as viewed from the thickness direction of the elastic membrane member, and each elastic membrane constituent portion has an area of By forming them in different shapes, the resonance frequencies that vibrate in the out-of-plane direction of the elastic film member are different from each other.
Therefore, by setting the area of each elastic membrane component to be the area corresponding to the resonance frequency that vibrates in the out-of-plane direction of the elastic membrane member, the resonance frequency of each elastic membrane component is set to a desired value. The resonance frequency can be set.
As a result, the intake sound enhancement device according to the first embodiment described above, i.e., the elastic membrane member has three elastic membrane components as viewed from the thickness direction of the elastic membrane member and is compared with the intake sound enhancement device. Thus, the range of the frequency band in which the intake sound can be emphasized can be further expanded, so that the quality of the intake sound introduced into the vehicle compartment can be improved.

(第三実施形態)
(構成)
次に、本発明の第三実施形態について説明する。
図8及び図9は、本実施形態の吸気音強調装置1の構成を示す図であり、図8は、弾性膜部材16の構成を示す図、図9は、図8のX−X線断面図である。
図8及び図9中に示すように、本実施形態の吸気音強調装置1の構成は、弾性膜部材16の構成を除き、上述した第一実施形態と同様の構成となっている。すなわち、本実施形態の弾性膜部材16は、剛性変化部が、弾性膜部材16の吸気ダクト側の面に設けた凸部40によって構成されている。
(Third embodiment)
(Constitution)
Next, a third embodiment of the present invention will be described.
8 and 9 are diagrams showing the configuration of the intake sound enhancement device 1 according to the present embodiment, FIG. 8 is a diagram showing the configuration of the elastic membrane member 16, and FIG. 9 is a cross-sectional view taken along the line XX of FIG. FIG.
As shown in FIGS. 8 and 9, the configuration of the intake sound enhancement device 1 of the present embodiment is the same as that of the first embodiment described above except for the configuration of the elastic film member 16. That is, in the elastic membrane member 16 of the present embodiment, the rigidity changing portion is configured by the convex portion 40 provided on the surface of the elastic membrane member 16 on the intake duct side.

凸部40は、弾性膜部材16の径方向から見て、吸気ダクト側へ突出するV字形をなしている。また、弾性膜部材16のうち、凸部40が設けられている部分の厚さは、その他の部分と同じ厚さに形成されている。すなわち、弾性膜部材16の厚さは、全体として均一になっている。このような凸部40が設けられている弾性膜部材16は、例えば、金型を用いた一体成形によって形成される。
その他の構成は、上述した第一実施形態と同様である。
The convex portion 40 has a V-shape that protrudes toward the intake duct as viewed from the radial direction of the elastic film member 16. Moreover, the thickness of the part in which the convex part 40 is provided among the elastic film members 16 is formed in the same thickness as another part. That is, the thickness of the elastic membrane member 16 is uniform as a whole. The elastic membrane member 16 provided with such convex portions 40 is formed by, for example, integral molding using a mold.
Other configurations are the same as those of the first embodiment described above.

(動作)
次に、本実施形態の吸気音強調装置1の動作について説明する。なお、以下の説明では、弾性膜部材16以外の構成については、上述した第一実施形態と同様であるため、異なる部分の動作を中心に説明する。
エンジン8を駆動させると、エンジン8の吸気動作に伴って発生する吸気脈動は、各インテークマニホールド28及びサージタンク26を介して、クリーンサイド側吸気ダクト20内に存在する気体に伝播する(図2参照)。
エンジン8を駆動させた状態で、アクセルペダルの踏み込み量を増加させて、エアクリーナ22からサージタンク26への通気量を増加させる(以下、加速時と記載する)と、エンジン8の回転数が上昇するとともに、吸気ダクト10内の気体に発生する吸気負圧が増加する(図2参照)。
(Operation)
Next, the operation of the intake sound enhancement device 1 of the present embodiment will be described. In the following description, since the configuration other than the elastic film member 16 is the same as that of the first embodiment described above, the operation of different parts will be mainly described.
When the engine 8 is driven, the intake pulsation generated by the intake operation of the engine 8 is propagated to the gas existing in the clean side intake duct 20 via each intake manifold 28 and the surge tank 26 (FIG. 2). reference).
When the engine 8 is driven and the amount of depression of the accelerator pedal is increased to increase the air flow from the air cleaner 22 to the surge tank 26 (hereinafter referred to as acceleration), the engine 8 speed increases. In addition, the intake negative pressure generated in the gas in the intake duct 10 increases (see FIG. 2).

加速時において、アクセルペダルの踏み込み量を変化させ、エンジンの回転数が変化すると、共振周波数の異なる各弾性膜構成部30a〜30cが、それぞれ、エンジンの回転数の変化に応じて、弾性膜部材の面外方向に振動することとなる。このため、第一周波数の吸気脈動、第二周波数の吸気脈動及び第三周波数の吸気脈動が増幅されて、追加管14の他方の開口端から、増音された吸気音が外気側へ放射される(図2参照)。
追加管14の他方の開口端から増音された吸気音が外気側へ放射されると、この放射された吸気音は、ダッシュパネル4を介して車室2内に伝播されるため、迫力感のある吸気音が車室2内へ導入される(図1参照)。
When accelerating, the amount of depression of the accelerator pedal is changed and the engine speed changes, so that the elastic film constituent parts 30a to 30c having different resonance frequencies are respectively elastic film members according to the change in the engine speed. Will vibrate in the out-of-plane direction. For this reason, the intake pulsation of the first frequency, the intake pulsation of the second frequency, and the intake pulsation of the third frequency are amplified, and the increased intake sound is radiated from the other open end of the additional pipe 14 to the outside air side. (See FIG. 2).
When the intake sound increased from the other opening end of the additional pipe 14 is radiated to the outside air side, the radiated intake sound is propagated into the vehicle compartment 2 via the dash panel 4, and thus a sense of force The intake sound with the noise is introduced into the passenger compartment 2 (see FIG. 1).

(応用例)
なお、本実施形態の吸気音強調装置1では、弾性膜部材16に設けた凸部40を、弾性膜部材16の径方向から見て吸気ダクト側へ突出するV字形をなし、且つ弾性膜部材16の厚さが全体として均一になっている形状に形成したが、これに限定されるものではない。すなわち、例えば、図10(a)に示すように、弾性膜部材16のうち、凸部40が設けられている部分の厚さが、その他の部分よりも厚くなっている構成としてもよい。また、例えば、図10(b)に示すように、凸部40を、弾性膜部材16の径方向から見てU字形をなし、弾性膜部材16の厚さが全体として均一になっている形状に形成してもよい。また、例えば、図10(c)に示すように、凸部40を、弾性膜部材16の径方向から見て吸気ダクト側へ突出するU字形をなし、且つ弾性膜部材16のうち、凸部40が設けられている部分の厚さが、その他の部分よりも厚くなっている構成としてもよい。
(Application examples)
In the intake sound emphasizing device 1 of the present embodiment, the convex portion 40 provided on the elastic membrane member 16 has a V-shape that protrudes toward the intake duct when viewed from the radial direction of the elastic membrane member 16, and the elastic membrane member. Although the thickness of 16 is formed into a uniform shape as a whole, the present invention is not limited to this. That is, for example, as shown in FIG. 10A, the elastic film member 16 may have a configuration in which the thickness of the portion where the convex portion 40 is provided is thicker than the other portions. Further, for example, as shown in FIG. 10B, the convex portion 40 is U-shaped when viewed from the radial direction of the elastic membrane member 16, and the thickness of the elastic membrane member 16 is uniform as a whole. You may form in. Further, for example, as shown in FIG. 10C, the convex portion 40 has a U-shape projecting toward the intake duct side when viewed from the radial direction of the elastic membrane member 16, and the convex portion of the elastic membrane member 16 is formed. It is good also as a structure where the thickness of the part in which 40 is provided is thicker than another part.

また、本実施形態の吸気音強調装置1では、剛性変化部を、弾性膜部材16の吸気ダクト側の面に設けた凸部40によって構成したが、これに限定されるものではない。すなわち、例えば、図11(a)、(c)に示すように、剛性変化部を、弾性膜部材16の吸気ダクト側の面に設けた凹部42によって構成してもよく、図11(b)、(d)に示すように、剛性変化部を、弾性膜部材16の外気側の面に設けた凸部40によって構成してもよい。   Further, in the intake sound emphasizing device 1 of the present embodiment, the rigidity changing portion is configured by the convex portion 40 provided on the surface of the elastic film member 16 on the intake duct side, but is not limited thereto. That is, for example, as shown in FIGS. 11 (a) and 11 (c), the rigidity changing portion may be constituted by a recess 42 provided on the surface of the elastic membrane member 16 on the intake duct side. As shown in (d), the rigidity changing portion may be constituted by a convex portion 40 provided on the surface of the elastic membrane member 16 on the outside air side.

(第三実施形態の効果)
(1)本実施形態の吸気音強調装置では、弾性膜部材の吸気ダクト側の面に設けられた凸部によって、弾性膜部材を複数の弾性膜構成部に分割する剛性変化部を構成しているため、簡単な構造によって、弾性膜部材を、複数の弾性膜構成部を有する構成とすることが可能となる。
その結果、弾性膜部材の製造コストが増加することを防止可能となるため、吸気音強調装置の製造コストが増加することを防止可能となり、吸気音強調装置の生産性を向上させることが可能となる。
(Effect of the third embodiment)
(1) In the intake sound emphasizing device of the present embodiment, the rigidity changing portion that divides the elastic membrane member into a plurality of elastic membrane constituent portions is configured by the convex portion provided on the surface of the elastic membrane member on the intake duct side. Therefore, the elastic film member can be configured to have a plurality of elastic film components by a simple structure.
As a result, it is possible to prevent an increase in the manufacturing cost of the elastic membrane member, and thus it is possible to prevent an increase in the manufacturing cost of the intake sound enhancement device, and it is possible to improve the productivity of the intake sound enhancement device. Become.

(第四実施形態)
(構成)
次に、本発明の第四実施形態について説明する。
図12及び図13は、本実施形態の吸気音強調装置1の構成を示す図であり、図12は、弾性膜部材16の構成を示す図、図13は、図12のY−Y線断面図である。
図12及び図13中に示すように、本実施形態の吸気音強調装置1の構成は、弾性膜部材16の構成を除き、上述した第一実施形態と同様の構成となっている。すなわち、本実施形態の弾性膜部材16は、剛性変化部が、弾性膜部材16の吸気ダクト側の面に設けた凸部40によって構成されているとともに、凸部40が、芯材44を有している。
(Fourth embodiment)
(Constitution)
Next, a fourth embodiment of the present invention will be described.
12 and 13 are diagrams showing the configuration of the intake sound enhancement device 1 of the present embodiment, FIG. 12 is a diagram showing the configuration of the elastic membrane member 16, and FIG. 13 is a cross-sectional view taken along the line YY in FIG. FIG.
As shown in FIGS. 12 and 13, the configuration of the intake sound enhancement device 1 of the present embodiment is the same as that of the first embodiment described above except for the configuration of the elastic film member 16. That is, in the elastic membrane member 16 of the present embodiment, the rigidity changing portion is configured by the convex portion 40 provided on the surface of the elastic membrane member 16 on the intake duct side, and the convex portion 40 has the core material 44. is doing.

凸部40は、弾性膜部材16の径方向から見て、吸気ダクト側へ突出するV字形をなしている。また、弾性膜部材16のうち、凸部40が設けられている部分の厚さは、その他の部分と同じ厚さに形成されている。すなわち、弾性膜部材16の厚さは、全体として均一になっている。
芯材44は、ワイヤ等、弾性膜部材16よりも剛性の高い線状の材料によって形成されており、弾性膜部材16の外気側の面に配置されている。
その他の構成は、上述した第一実施形態と同様である。
The convex portion 40 has a V-shape that protrudes toward the intake duct as viewed from the radial direction of the elastic film member 16. Moreover, the thickness of the part in which the convex part 40 is provided among the elastic film members 16 is formed in the same thickness as another part. That is, the thickness of the elastic membrane member 16 is uniform as a whole.
The core member 44 is formed of a linear material having rigidity higher than that of the elastic film member 16 such as a wire, and is disposed on the surface of the elastic film member 16 on the outside air side.
Other configurations are the same as those of the first embodiment described above.

(動作)
次に、本実施形態の吸気音強調装置1の動作について説明する。なお、以下の説明では、弾性膜部材16以外の構成については、上述した第一実施形態と同様であるため、異なる部分の動作を中心に説明する。
エンジン8を駆動させると、エンジン8の吸気動作に伴って発生する吸気脈動は、各インテークマニホールド28及びサージタンク26を介して、クリーンサイド側吸気ダクト20内に存在する気体に伝播する(図2参照)。
エンジン8を駆動させた状態で、アクセルペダルの踏み込み量を増加させて、エアクリーナ22からサージタンク26への通気量を増加させる(以下、加速時と記載する)と、エンジン8の回転数が上昇するとともに、吸気ダクト10内の気体に発生する吸気負圧が増加する(図2参照)。
(Operation)
Next, the operation of the intake sound enhancement device 1 of the present embodiment will be described. In the following description, since the configuration other than the elastic film member 16 is the same as that of the first embodiment described above, the operation of different parts will be mainly described.
When the engine 8 is driven, the intake pulsation generated by the intake operation of the engine 8 is propagated to the gas existing in the clean side intake duct 20 via each intake manifold 28 and the surge tank 26 (FIG. 2). reference).
When the engine 8 is driven and the amount of depression of the accelerator pedal is increased to increase the air flow from the air cleaner 22 to the surge tank 26 (hereinafter referred to as acceleration), the engine 8 speed increases. In addition, the intake negative pressure generated in the gas in the intake duct 10 increases (see FIG. 2).

加速時において、アクセルペダルの踏み込み量を変化させ、エンジンの回転数が変化すると、共振周波数の異なる各弾性膜構成部30a〜30cが、それぞれ、エンジンの回転数の変化に応じて、弾性膜部材の面外方向に振動することとなる。このため、第一周波数の吸気脈動、第二周波数の吸気脈動及び第三周波数の吸気脈動が増幅されて、追加管14の他方の開口端から、増音された吸気音が外気側へ放射される(図2参照)。
追加管14の他方の開口端から増音された吸気音が外気側へ放射されると、この放射された吸気音は、ダッシュパネル4を介して車室2内に伝播されるため、迫力感のある吸気音が車室2内へ導入される(図1参照)。
When accelerating, the amount of depression of the accelerator pedal is changed and the engine speed changes, so that the elastic film constituent parts 30a to 30c having different resonance frequencies are respectively elastic film members according to the change in the engine speed. Will vibrate in the out-of-plane direction. For this reason, the intake pulsation of the first frequency, the intake pulsation of the second frequency, and the intake pulsation of the third frequency are amplified, and the increased intake sound is radiated from the other open end of the additional pipe 14 to the outside air side. (See FIG. 2).
When the intake sound increased from the other opening end of the additional pipe 14 is radiated to the outside air side, the radiated intake sound is propagated into the vehicle compartment 2 via the dash panel 4, and thus a sense of force The intake sound with the noise is introduced into the passenger compartment 2 (see FIG. 1).

(応用例)
なお、本実施形態の吸気音強調装置1では、弾性膜部材16に設けた凸部40を、弾性膜部材16の径方向から見て吸気ダクト側へ突出するV字形に形成するとともに、弾性膜部材16の厚さが全体として均一になっている形状に形成し、芯材44が、弾性膜部材16の外気側の面に配置されている構成としたが、これに限定されるものではない。すなわち、例えば、図14(a)に示すように、弾性膜部材16のうち、凸部40が設けられている部分の厚さが、その他の部分よりも厚くなっているとともに、芯材44が、弾性膜部材16のうち凸部40が設けられている部分の内部に配置されている構成としてもよい。また、例えば、図14(b)に示すように、凸部40を、弾性膜部材16の径方向から見て吸気ダクト側へ突出するU字形に形成してもよい。また、例えば、図14(c)に示すように、凸部40を、弾性膜部材16の径方向から見て吸気ダクト側へ突出するU字形に形成するとともに、弾性膜部材16のうち、凸部40が設けられている部分の厚さが、その他の部分よりも厚くなっている構成として、芯材44が、弾性膜部材16のうち凸部40が設けられている部分の内部に配置されている構成としてもよい。
(Application examples)
In the intake sound emphasizing device 1 of the present embodiment, the convex portion 40 provided on the elastic film member 16 is formed in a V shape that protrudes toward the intake duct as viewed from the radial direction of the elastic film member 16, and the elastic film The member 16 is formed in a uniform shape as a whole, and the core member 44 is disposed on the surface of the elastic membrane member 16 on the outside air side. However, the present invention is not limited to this. . That is, for example, as shown in FIG. 14A, the thickness of the portion of the elastic film member 16 where the convex portion 40 is provided is thicker than the other portions, and the core member 44 is Further, the elastic film member 16 may be configured to be disposed inside a portion where the convex portion 40 is provided. Further, for example, as shown in FIG. 14B, the convex portion 40 may be formed in a U shape that protrudes toward the intake duct as viewed from the radial direction of the elastic membrane member 16. Further, for example, as shown in FIG. 14 (c), the convex portion 40 is formed in a U-shape that protrudes toward the intake duct side when viewed from the radial direction of the elastic membrane member 16. As a configuration in which the thickness of the portion where the portion 40 is provided is thicker than the other portions, the core member 44 is disposed inside the portion of the elastic film member 16 where the convex portion 40 is provided. It is good also as composition which has.

また、本実施形態の吸気音強調装置1では、剛性変化部を、弾性膜部材16の吸気ダクト側の面に設けた凸部40によって構成したが、これに限定されるものではない。すなわち、例えば、図15(a)、(c)に示すように、剛性変化部を、弾性膜部材16の吸気ダクト側の面に設けた凹部42によって構成してもよく、図15(b)、(d)に示すように、剛性変化部を、弾性膜部材16の外気側の面に設けた凸部40によって構成してもよい。   Further, in the intake sound emphasizing device 1 of the present embodiment, the rigidity changing portion is configured by the convex portion 40 provided on the surface of the elastic film member 16 on the intake duct side, but is not limited thereto. That is, for example, as shown in FIGS. 15 (a) and 15 (c), the rigidity changing portion may be constituted by a recess 42 provided on the surface of the elastic membrane member 16 on the intake duct side. As shown in (d), the rigidity changing portion may be constituted by a convex portion 40 provided on the surface of the elastic membrane member 16 on the outside air side.

(第四実施形態の効果)
(1)本実施形態の吸気音強調装置では、弾性膜部材の吸気ダクト側の面に設けられた凸部によって、弾性膜部材を複数の弾性膜構成部に分割する剛性変化部を構成するとともに、凸部が、芯材を有している。
このため、簡単な構造によって、弾性膜部材を、複数の弾性膜構成部を有する構成とすることが可能となるとともに、凸部の強度を向上させることが可能となる。
その結果、吸気音強調装置の生産性を向上させることが可能となるとともに、上述した第三実施形態の吸気音強調装置と比較して、弾性膜部材の強度を向上させることが可能となるため、弾性膜部材の耐久性を向上させることが可能となる。
(Effect of the fourth embodiment)
(1) In the intake sound emphasizing device of the present embodiment, the convex portion provided on the surface of the elastic membrane member on the intake duct side constitutes a rigidity changing portion that divides the elastic membrane member into a plurality of elastic membrane constituent portions. The convex portion has a core material.
Therefore, with a simple structure, the elastic film member can be configured to have a plurality of elastic film components, and the strength of the protrusions can be improved.
As a result, the productivity of the intake sound enhancement device can be improved, and the strength of the elastic film member can be improved as compared with the intake sound enhancement device of the third embodiment described above. The durability of the elastic membrane member can be improved.

(第五実施形態)
(構成)
次に、本発明の第五実施形態について説明する。
図16は、本実施形態の吸気音強調装置1の構成を示す図であり、弾性膜部材16の構成を示す図である。
図16中に示すように、本実施形態の吸気音強調装置1の構成は、弾性膜部材16の構成を除き、上述した第一実施形態と同様の構成となっている。すなわち、本実施形態の弾性膜部材16は、各弾性膜構成部30a〜30cが、それぞれ、剛性が互いに異なる材料で形成されている。具体的には、弾性膜構成部30aの剛性Raは、弾性膜構成部30bの剛性Rbよりも低く、弾性膜構成部30bの剛性Rbは、弾性膜構成部30cの剛性Rcよりも低くなるように形成されている。すなわち、各弾性膜構成部30a〜30cは、それぞれ、Ra>Rb>Rcの条件式が成立するように形成されている。
(Fifth embodiment)
(Constitution)
Next, a fifth embodiment of the present invention will be described.
FIG. 16 is a diagram illustrating a configuration of the intake sound enhancement device 1 according to the present embodiment, and is a diagram illustrating a configuration of the elastic film member 16.
As shown in FIG. 16, the configuration of the intake sound enhancement device 1 of the present embodiment is the same as that of the first embodiment described above except for the configuration of the elastic film member 16. That is, in the elastic film member 16 of the present embodiment, the elastic film components 30a to 30c are formed of materials having different stiffnesses. Specifically, the stiffness Ra of the elastic membrane component 30a is lower than the stiffness Rb of the elastic membrane component 30b, and the stiffness Rb of the elastic membrane component 30b is lower than the stiffness Rc of the elastic membrane component 30c. Is formed. That is, each elastic membrane component 30a-30c is formed so that the conditional expression of Ra>Rb> Rc is satisfied.

ここで、各弾性膜構成部30a〜30cは、互いの剛性が異なっているため、弾性膜部材16の面外方向へ振動する共振周波数が互いに異なっている。また、剛性の高い弾性膜構成部30は、剛性の低い弾性膜構成部30と比較して、面外方向への振動を生じる共振周波数が低くなる。したがって、各弾性膜構成部30a〜30cは、弾性膜構成部30aの共振周波数を第一共振周波数f1、弾性膜構成部30bの共振周波数を第二共振周波数f2、弾性膜構成部30cの共振周波数を第三共振周波数f3とした場合に、f1<f2<f3の条件式が成立するように形成されている。   Here, since each elastic film | membrane structure part 30a-30c has mutually different rigidity, the resonant frequency which vibrates to the out-of-plane direction of the elastic film member 16 mutually differs. In addition, the elastic membrane constituent unit 30 having high rigidity has a lower resonance frequency that causes vibration in the out-of-plane direction compared to the elastic membrane constituent unit 30 having low rigidity. Therefore, each elastic membrane component 30a-30c has a resonance frequency of the elastic membrane component 30a as the first resonance frequency f1, a resonance frequency of the elastic membrane component 30b as the second resonance frequency f2, and a resonance frequency of the elastic membrane component 30c. Is set so that the conditional expression f1 <f2 <f3 is satisfied.

また、本実施形態の弾性膜部材16は、各弾性膜構成部30a〜30cを、それぞれ、剛性が互いに異なる材料で形成することにより、弾性膜部材16の吸気ダクト側の面に溝等の剛性変化部を設けることなく、三つに分割された弾性膜構成部30a〜30cを有する構成となっている。
その他の構成は、上述した第一実施形態と同様である。
In the elastic membrane member 16 of the present embodiment, the elastic membrane constituent portions 30a to 30c are formed of materials having different rigidity, so that rigidity such as a groove is formed on the surface of the elastic membrane member 16 on the intake duct side. It is the structure which has the elastic membrane structure parts 30a-30c divided | segmented into three, without providing a change part.
Other configurations are the same as those of the first embodiment described above.

(動作)
次に、本実施形態の吸気音強調装置1の動作について説明する。なお、以下の説明では、弾性膜部材16以外の構成については、上述した第一実施形態と同様であるため、異なる部分の動作を中心に説明する。
エンジン8を駆動させると、エンジン8の吸気動作に伴って発生する吸気脈動は、各インテークマニホールド28及びサージタンク26を介して、クリーンサイド側吸気ダクト20内に存在する気体に伝播する(図2参照)。
エンジン8を駆動させた状態で、アクセルペダルの踏み込み量を増加させて、エアクリーナ22からサージタンク26への通気量を増加させる(以下、加速時と記載する)と、エンジン8の回転数が上昇するとともに、吸気ダクト10内の気体に発生する吸気負圧が増加する(図2参照)。
(Operation)
Next, the operation of the intake sound enhancement device 1 of the present embodiment will be described. In the following description, since the configuration other than the elastic film member 16 is the same as that of the first embodiment described above, the operation of different parts will be mainly described.
When the engine 8 is driven, the intake pulsation generated by the intake operation of the engine 8 is propagated to the gas existing in the clean side intake duct 20 via each intake manifold 28 and the surge tank 26 (FIG. 2). reference).
When the engine 8 is driven and the amount of depression of the accelerator pedal is increased to increase the air flow from the air cleaner 22 to the surge tank 26 (hereinafter referred to as acceleration), the engine 8 speed increases. In addition, the intake negative pressure generated in the gas in the intake duct 10 increases (see FIG. 2).

このとき、各弾性膜構成部30a〜30cは、互いの剛性が異なっているため、弾性膜部材16の面外方向へ振動する共振周波数が互いに異なっている。
このため、加速時において、アクセルペダルの踏み込み量を変化させ、エンジンの回転数が変化すると、各弾性膜構成部30a〜30cが、それぞれ、エンジンの回転数の変化に応じて、弾性膜部材の面外方向に振動することとなる。
At this time, since each elastic film component 30a-30c has mutually different rigidity, the resonance frequency which vibrates to the out-of-plane direction of the elastic film member 16 mutually differs.
For this reason, at the time of acceleration, when the amount of depression of the accelerator pedal is changed and the engine speed is changed, each elastic film constituting unit 30a to 30c is changed to the elastic film member according to the change in the engine speed. It will vibrate in the out-of-plane direction.

したがって、第一周波数の吸気脈動、第二周波数の吸気脈動及び第三周波数の吸気脈動が増幅されて、追加管14の他方の開口端から、増音された吸気音が外気側へ放射される(図2参照)。
追加管14の他方の開口端から増音された吸気音が外気側へ放射されると、この放射された吸気音は、ダッシュパネル4を介して車室2内に伝播されるため、迫力感のある吸気音が車室2内へ導入される(図1参照)。
Therefore, the intake pulsation of the first frequency, the intake pulsation of the second frequency, and the intake pulsation of the third frequency are amplified, and the increased intake sound is radiated from the other opening end of the additional pipe 14 to the outside air side. (See FIG. 2).
When the intake sound increased from the other opening end of the additional pipe 14 is radiated to the outside air side, the radiated intake sound is propagated into the vehicle compartment 2 via the dash panel 4, and thus a sense of force The intake sound with the noise is introduced into the passenger compartment 2 (see FIG. 1).

(応用例)
なお、本実施形態の吸気音強調装置1では、各弾性膜構成部30a〜30cを、それぞれ、剛性が互いに異なる材料で形成することにより、互いの剛性が異なる構成として、弾性膜部材16の面外方向へ振動する共振周波数が互いに異なっている構成としたが、これに限定されるものではない。すなわち、各弾性膜構成部30a〜30cを、それぞれ、質量が互いに異なる材料で形成することにより、互いの質量が異なる構成として、弾性膜部材16の面外方向へ振動する共振周波数が互いに異なっている構成としてもよい。要は、各弾性膜構成部30a〜30cを、それぞれ、剛性及び質量のうち少なくとも一方が互いに異なる材料で形成することにより、弾性膜部材16の面外方向へ振動する共振周波数が互いに異なっている構成とすればよい。
(Application examples)
In addition, in the intake sound emphasizing device 1 of the present embodiment, the elastic film members 16a to 30c are formed of materials having different rigidity, so that the rigidity of the elastic film member 16 is different. Although the resonance frequencies that vibrate outward are different from each other, the present invention is not limited to this. That is, by forming the elastic film constituent portions 30a to 30c from materials having different masses, the respective masses are different from each other, and the resonance frequencies that vibrate in the out-of-plane direction of the elastic film member 16 are different from each other. It is good also as composition which has. The point is that each of the elastic membrane constituent portions 30a to 30c is made of a material having at least one of rigidity and mass different from each other, so that the resonance frequencies that vibrate in the out-of-plane direction of the elastic membrane member 16 are different from each other. What is necessary is just composition.

また、本実施形態の弾性膜部材16では、各弾性膜構成部30a〜30cを、それぞれ、剛性が互いに異なる材料で形成することにより、弾性膜部材16の吸気ダクト側の面に溝等の剛性変化部を設けることなく、三つに分割された弾性膜構成部30a〜30cを有する構成としたが、これに限定されるものではない。すなわち、弾性膜部材16を、例えば、上述した第一から第四実施形態と同様に、弾性膜部材16の吸気ダクト側の面に溝等の剛性変化部を設けることにより、三つに分割された弾性膜構成部30a〜30cを有する構成としてもよい。   Further, in the elastic membrane member 16 of the present embodiment, the elastic membrane constituent portions 30a to 30c are formed of materials having different rigidity from each other, so that a rigidity such as a groove is formed on the surface of the elastic membrane member 16 on the intake duct side. Although it was set as the structure which has the elastic film structure parts 30a-30c divided | segmented into three, without providing a change part, it is not limited to this. That is, the elastic membrane member 16 is divided into three by providing a rigidity changing portion such as a groove on the surface of the elastic membrane member 16 on the intake duct side, for example, as in the first to fourth embodiments described above. It is good also as composition which has elastic membrane constituent parts 30a-30c.

(第五実施形態の効果)
(1)本実施形態の吸気音強調装置では、弾性膜部材を、弾性膜部材の厚さ方向から見て、三つの弾性膜構成部を有する構成としており、各弾性膜構成部を、それぞれ、互いの剛性が異なる構成とすることにより、弾性膜部材の面外方向へ振動する共振周波数が互いに異なる構成としている。
このため、加速時においては、エンジンの回転数の変化に応じて、各弾性膜構成部が、弾性膜部材の面外方向に振動する。
したがって、エンジンの回転数の変化に応じて、第一周波数の吸気脈動、第二周波数及び第三周波数の吸気脈動が増幅されて、追加管の他方の開口端から、増音された吸気音が外気側へ放射される。放射された吸気音は、ダッシュパネルを介して車室内に伝播されるため、迫力感のある吸気音が車室内へ導入される。
(Effect of the fifth embodiment)
(1) In the inspiratory sound emphasizing device of the present embodiment, the elastic film member is configured to have three elastic film components when viewed from the thickness direction of the elastic film member, and each elastic film component is By adopting a configuration in which the mutual rigidity is different, the resonance frequencies that vibrate in the out-of-plane direction of the elastic film member are different from each other.
For this reason, at the time of acceleration, each elastic membrane component vibrates in the out-of-plane direction of the elastic membrane member in accordance with a change in the engine speed.
Accordingly, the intake pulsation of the first frequency, the second frequency, and the third frequency are amplified according to the change in the engine speed, and the increased intake sound is generated from the other open end of the additional pipe. Radiated to the outside air side. Since the radiated intake sound is propagated into the vehicle interior via the dash panel, a powerful intake sound is introduced into the vehicle interior.

その結果、一つの弾性膜部材によって複数の共振周波数を発生させることが可能となり、複数の吸気ダクトを必要とせずに、迫力感のある吸気音を発生させることが可能となる。また、複数の吸気ダクトを必要としない構成となるため、レイアウトの自由度を向上させることが可能となり、車体の大きさが異なる車両等、構成の異なる多種類の車両に適用可能となる。   As a result, it is possible to generate a plurality of resonance frequencies with one elastic membrane member, and it is possible to generate a powerful intake sound without requiring a plurality of intake ducts. In addition, since the configuration does not require a plurality of intake ducts, it is possible to improve the degree of freedom of layout, and it can be applied to many types of vehicles having different configurations such as vehicles having different body sizes.

(2)また、本実施形態の吸気音強調装置では、弾性膜部材を、弾性膜部材の厚さ方向から見て、三つの弾性膜構成部を有する構成としており、各弾性膜構成部を、剛性が互いに異なる形状に形成することにより、弾性膜部材の面外方向へ振動する共振周波数が互いに異なる構成としている。
したがって、各弾性膜構成部の剛性を、それぞれ、弾性膜部材の面外方向へ振動する共振周波数に応じた剛性となるように設定することにより、各弾性膜構成部の共振周波数を、所望の共振周波数に設定することが可能となる。
その結果、各弾性膜構成部が弾性膜部材の面外方向へ振動する共振周波数を、複数の所望の周波数に設定することが可能となり、吸気音を強調可能な周波数帯域の範囲を拡げることが可能となるため、車室内へ導入される吸気音の音質を向上させることが可能となる。
(2) Moreover, in the inspiratory sound emphasizing device of the present embodiment, the elastic film member is configured to have three elastic film constituent parts when viewed from the thickness direction of the elastic film member, and each elastic film constituent part is By forming them in different shapes, the resonance frequencies that vibrate in the out-of-plane direction of the elastic membrane member are different from each other.
Therefore, by setting the rigidity of each elastic membrane component so as to be in accordance with the resonance frequency that vibrates in the out-of-plane direction of the elastic membrane member, the resonance frequency of each elastic membrane component is set to a desired value. The resonance frequency can be set.
As a result, the resonance frequency at which each elastic membrane component vibrates in the out-of-plane direction of the elastic membrane member can be set to a plurality of desired frequencies, and the frequency band range in which the intake sound can be emphasized can be expanded. Therefore, it is possible to improve the quality of the intake sound introduced into the vehicle interior.

(3)また、本実施形態の吸気音強調装置では、弾性膜部材を、各弾性膜構成部を、それぞれ、剛性が互いに異なる材料で形成することにより、弾性膜部材の吸気ダクト側の面に溝等の剛性変化部を設けることなく、三つに分割された弾性膜構成部を有する構成としている。
したがって、弾性膜部材のうち隣り合う弾性膜構成部同士の境界部分に、その他の部分よりも厚さが薄い剛性変化部を設けない構成となるため、弾性膜部材の耐久性を向上させることが可能となる。
(3) Further, in the intake sound emphasizing device of the present embodiment, the elastic membrane member is formed on the surface of the elastic membrane member on the side of the intake duct by forming each elastic membrane constituent portion with a material having different rigidity. Without having a rigidity changing portion such as a groove, the elastic membrane constituting portion is divided into three parts.
Therefore, the elastic film member has a configuration in which the rigidity changing part having a thickness smaller than that of the other part is not provided at the boundary part between adjacent elastic film constituent parts of the elastic film member, so that the durability of the elastic film member can be improved. It becomes possible.

(実施例)
図17に、本発明の吸気音強調装置及び従来の吸気音強調装置を用い、加速時において、車室内へ導入される吸気音の音圧レベルを測定した結果を示す。なお、図17の縦軸は、車室内へ導入される吸気音の音圧レベル(図中では、「室内音音圧レベル[db]」と記載している)を示している。また、図17の横軸は、加速時におけるエンジン回転数(図中では、「ENG回転数[rpm]」と記載している)と、エンジン回転数の変化に伴って発生する周波数(図中では、「周波数[Hz]」と記載している)を示している。
(Example)
FIG. 17 shows the result of measuring the sound pressure level of the intake sound introduced into the vehicle compartment during acceleration using the intake sound enhancement device of the present invention and the conventional intake sound enhancement device. Note that the vertical axis in FIG. 17 indicates the sound pressure level of the intake sound introduced into the vehicle interior (indicated as “indoor sound pressure level [db]” in the figure). In addition, the horizontal axis of FIG. 17 represents the engine speed during acceleration (indicated as “ENG speed [rpm]” in the figure) and the frequency generated in accordance with the change in engine speed (in the figure). Shows “frequency [Hz]”.

本発明例の吸気音強調装置としては、図3に示すような、本発明の第一実施形態で説明したものと同様の構成を有する弾性膜部材を備えた吸気音強調装置を用いた。
比較例の吸気音強調装置としては、図18に示す弾性膜部材16のように、一体物で形成された弾性膜部材16を備えた吸気音強調装置を用いた。ここで、図18に示す弾性膜部材16は、本発明の第一実施形態で説明したものと異なり、複数の弾性膜構成部を有していない構成となっているため、弾性膜部材の面外方向へ振動する共振周波数が全体として同一となっている。
As the inspiratory sound emphasizing apparatus of the present invention example, an inspiratory sound emphasizing apparatus having an elastic film member having the same configuration as that described in the first embodiment of the present invention as shown in FIG. 3 was used.
As an inspiratory sound emphasizing device of a comparative example, an inspiratory sound emphasizing device provided with an elastic film member 16 formed as a single body, such as the elastic film member 16 shown in FIG. 18, was used. Here, the elastic membrane member 16 shown in FIG. 18 is different from that described in the first embodiment of the present invention, and has a configuration that does not have a plurality of elastic membrane constituent portions. The resonance frequency that vibrates outward is the same as a whole.

次に、図17を参照して、加速時において、車室内へ導入される吸気音の音圧レベルを測定した結果について説明する。なお、図17中では、従来の吸気音強調装置を用いて音圧レベルを測定した結果を破線によって示し、本発明の吸気音強調装置を用いて音圧レベルを測定した結果を実線によって示している。
図17中に示されているように、従来の吸気音強調装置は、共振周波数が全体として同一であるため、370Hz付近において、車室内へ導入される吸気音の音圧レベルが特に強調され、その他の周波数では、370Hz付近と比較して、吸気音の強調効果が低下している。
Next, the result of measuring the sound pressure level of the intake sound introduced into the vehicle compartment during acceleration will be described with reference to FIG. In FIG. 17, the result of measuring the sound pressure level using the conventional intake sound enhancement device is shown by a broken line, and the result of measuring the sound pressure level using the intake sound enhancement device of the present invention is shown by a solid line. Yes.
As shown in FIG. 17, since the conventional intake sound enhancement device has the same resonance frequency as a whole, the sound pressure level of the intake sound introduced into the passenger compartment is particularly emphasized in the vicinity of 370 Hz. At other frequencies, the enhancement effect of the intake sound is reduced compared to the vicinity of 370 Hz.

これに対し、本発明の吸気音強調装置では、370Hz付近と、450Hz付近及び590Hz付近において、車室内へ導入される吸気音の音圧レベルが特に強調され、その他の周波数においても、従来の吸気音強調装置と比較して、吸気音の強調効果が向上している。
その結果、加速時における周波数帯域の全体に亘って吸気音が強調されており、従来の吸気音強調装置と比較して、広い周波数帯域で吸気音の強調効果が向上している。なお、図17中では、本発明例の吸気音強調装置によって、増音された吸気音の強調効果が従来の吸気音強調装置と比較して向上した範囲を、斜線で示している。
以上の測定結果から、本発明例の吸気音強調装置は、従来の吸気音強調装置と比較して、吸気音の強調効果が高いことが確認された。
On the other hand, in the intake sound emphasizing device of the present invention, the sound pressure level of the intake sound introduced into the passenger compartment is particularly emphasized at around 370 Hz, around 450 Hz, and around 590 Hz. Compared with the sound enhancement device, the enhancement effect of the intake sound is improved.
As a result, the intake sound is emphasized over the entire frequency band during acceleration, and the effect of enhancing the intake sound is improved over a wide frequency band as compared with the conventional intake sound enhancement device. In FIG. 17, the range in which the enhancement effect of the increased intake sound by the intake sound enhancement device of the present invention is improved as compared with the conventional intake sound enhancement device is indicated by hatching.
From the above measurement results, it was confirmed that the intake sound emphasizing device of the example of the present invention has a higher effect of enhancing the intake sound compared to the conventional intake sound emphasizing device.

本実施形態の吸気音強調装置1を搭載した車両Cを示す図であり、図1(a)は車両Cを側方から見た状態を示す図、図1(b)は車両Cを上方から見た状態を示す図、図1(c)は車両Cを前方から見た状態を示す図である。It is a figure which shows the vehicle C carrying the intake sound emphasizing apparatus 1 of this embodiment, FIG. 1 (a) is a figure which shows the state which looked at the vehicle C from the side, FIG.1 (b) shows the vehicle C from upper direction. FIG. 1C is a diagram illustrating a state in which the vehicle C is viewed from the front. 本発明の第一実施形態に係る吸気音強調装置1の構成を示す図である。It is a figure which shows the structure of the intake sound emphasizing apparatus 1 which concerns on 1st embodiment of this invention. 弾性膜部材16の詳細な構成を示す図である。FIG. 3 is a diagram showing a detailed configuration of an elastic membrane member 16. 加速時において、各弾性膜構成部30a〜30cが弾性膜部材の面外方向へ振動する状態を示す図であり、エンジンの回転数がR1である状態を示す図である。It is a figure which shows the state which each elastic film structure part 30a-30c vibrates to the out-of-plane direction of an elastic film member at the time of acceleration, and is a figure which shows the state whose engine speed is R1. 加速時において、各弾性膜構成部30a〜30cが弾性膜部材の面外方向へ振動する状態を示す図であり、エンジンの回転数がR2である状態を示す図である。It is a figure which shows the state which each elastic film structure part 30a-30c vibrates to the out-of-plane direction of an elastic film member at the time of acceleration, and is a figure which shows the state whose engine speed is R2. 加速時において、各弾性膜構成部30a〜30cが弾性膜部材の面外方向へ振動する状態を示す図であり、エンジンの回転数がR3である状態を示す図である。It is a figure which shows the state which each elastic film structure part 30a-30c vibrates to the out-of-plane direction of an elastic film member at the time of acceleration, and is a figure which shows the state whose engine speed is R3. 本発明の第二実施形態に係る吸気音強調装置1の構成を示す図であり、弾性膜部材16の構成を示す図である。It is a figure which shows the structure of the intake sound emphasizing apparatus 1 which concerns on 2nd embodiment of this invention, and is a figure which shows the structure of the elastic film member 16. FIG. 本発明の第三実施形態に係る吸気音強調装置1の構成を示す図であり、弾性膜部材16の構成を示す図である。It is a figure which shows the structure of the intake sound emphasizing apparatus 1 which concerns on 3rd embodiment of this invention, and is a figure which shows the structure of the elastic film member. 図8のX−X線断面図である。It is the XX sectional view taken on the line of FIG. 本発明の第三実施形態に係る吸気音強調装置1の変形例を示す図である。It is a figure which shows the modification of the intake sound emphasizing apparatus 1 which concerns on 3rd embodiment of this invention. 本発明の第三実施形態に係る吸気音強調装置1の変形例を示す図である。It is a figure which shows the modification of the intake sound emphasizing apparatus 1 which concerns on 3rd embodiment of this invention. 本発明の第四実施形態に係る吸気音強調装置1の構成を示す図であり、弾性膜部材16の構成を示す図である。It is a figure which shows the structure of the intake sound emphasizing apparatus 1 which concerns on 4th embodiment of this invention, and is a figure which shows the structure of the elastic film member 16. FIG. 図12のY−Y線断面図である。It is the YY sectional view taken on the line of FIG. 本発明の第四実施形態に係る吸気音強調装置1の変形例を示す図である。It is a figure which shows the modification of the intake sound emphasizing apparatus 1 which concerns on 4th embodiment of this invention. 本発明の第四実施形態に係る吸気音強調装置1の変形例を示す図である。It is a figure which shows the modification of the intake sound emphasizing apparatus 1 which concerns on 4th embodiment of this invention. 本発明の第五実施形態に係る吸気音強調装置1の構成を示す図であり、弾性膜部材16の構成を示す図である。It is a figure which shows the structure of the intake sound emphasizing apparatus 1 which concerns on 5th embodiment of this invention, and is a figure which shows the structure of the elastic film member 16. FIG. 本発明の吸気音強調装置及び従来の吸気音強調装置を用い、加速時において、車室内へ導入される吸気音の音圧レベルを測定した結果を示す図である。It is a figure which shows the result of having measured the sound pressure level of the intake sound introduce | transduced into a vehicle interior at the time of acceleration using the intake sound enhancement apparatus of this invention, and the conventional intake sound enhancement apparatus. 従来の吸気音強調装置が備える弾性膜部材16の構成を示す図である。It is a figure which shows the structure of the elastic film member 16 with which the conventional intake sound emphasis apparatus is provided.

符号の説明Explanation of symbols

1 吸気音強調装置
2 車室
4 ダッシュパネル
6 エンジンルーム
8 エンジン
10 吸気ダクト
12 連通管
14 追加管
16 弾性膜部材
18 ダストサイド側吸気ダクト
20 クリーンサイド側吸気ダクト
22 エアクリーナ
24 スロットルチャンバ
26 サージタンク
28 インテークマニホールド
30 弾性膜構成部
32 溝
34 剛性変化部
36 円状剛性変化部
38 放射状剛性変化部
40 凸部
42 凹部
44 芯材
C 車両
DESCRIPTION OF SYMBOLS 1 Intake sound emphasis apparatus 2 Car compartment 4 Dash panel 6 Engine room 8 Engine 10 Intake duct 12 Communication pipe 14 Additional pipe 16 Elastic film member 18 Dust side side intake duct 20 Clean side side intake duct 22 Air cleaner 24 Throttle chamber 26 Surge tank 28 Intake manifold 30 Elastic membrane component 32 Groove 34 Rigidity changing part 36 Circular rigidity changing part 38 Radial rigidity changing part 40 Convex part 42 Concave part 44 Core material C Vehicle

Claims (9)

エンジンへの吸気通路をなす吸気ダクトの外周面に取り付けられて前記吸気ダクトと連通する連通管と、当該連通管を閉塞し、且つ吸気負圧の変化に応じて弾性変形することにより面外方向へ振動する弾性膜部材と、を備える吸気音強調装置において、
前記弾性膜部材は、当該弾性膜部材の面外方向へ振動する共振周波数が互いに異なる少なくとも二つの弾性膜構成部を有することを特徴とする吸気音強調装置。
A communication pipe that is attached to the outer peripheral surface of an intake duct that forms an intake passage to the engine and communicates with the intake duct, and closes the communication pipe, and elastically deforms in response to a change in intake negative pressure, thereby causing an out-of-plane direction. Inspiratory sound emphasizing device comprising an elastic membrane member that vibrates toward
The inspiratory sound emphasizing device, wherein the elastic membrane member has at least two elastic membrane components having different resonance frequencies that vibrate in an out-of-plane direction of the elastic membrane member.
前記少なくとも二つの弾性膜構成部は、面積が互いに異なることを特徴とする請求項1に記載した吸気音強調装置。   The intake sound emphasizing device according to claim 1, wherein the at least two elastic film constituent parts have different areas. 前記少なくとも二つの弾性膜構成部は、剛性及び質量のうち少なくとも一方が互いに異なることを特徴とする請求項1または2に記載した吸気音強調装置。   The intake sound emphasizing device according to claim 1, wherein at least one of the at least two elastic film constituent portions is different from each other in rigidity and mass. 前記少なくとも二つの弾性膜構成部は、剛性及び質量のうち少なくとも一方が互いに異なる材料で形成されていることを特徴とする請求項1から3のうちいずれか1項に記載した吸気音強調装置。   The intake sound emphasizing device according to any one of claims 1 to 3, wherein the at least two elastic film constituent parts are formed of materials having at least one of rigidity and mass different from each other. 前記少なくとも二つの弾性膜構成部間に、当該少なくとも二つの弾性膜構成部と剛性が異なる剛性変化部を形成したことを特徴とする請求項1から4のうちいずれか1項に記載した吸気音強調装置。   5. The intake sound according to claim 1, wherein a stiffness changing portion having a stiffness different from that of the at least two elastic membrane constituent portions is formed between the at least two elastic membrane constituent portions. Emphasis device. 前記剛性変化部は、前記弾性膜部材の面上に設けた凸部及び凹部のうち少なくとも一方であることを特徴とする請求項5に記載した吸気音強調装置。   6. The intake sound emphasizing device according to claim 5, wherein the rigidity changing portion is at least one of a convex portion and a concave portion provided on the surface of the elastic film member. 前記剛性変化部は、線状の芯材を有することを特徴とする請求項5または6に記載した吸気音強調装置。   The intake sound emphasizing device according to claim 5 or 6, wherein the rigidity changing portion has a linear core member. 前記剛性変化部は、少なくとも前記弾性膜部材の中央を包囲する真円形状または楕円形状の円状剛性変化部と、当該円状剛性変化部から前記弾性膜部材の外周部へ向けて延在し、且つ前記円状剛性変化部が包囲する部分以外を少なくとも二つに分割する放射状剛性変化部と、を備えることを特徴とする請求項5から7のうちいずれか1項に記載した吸気音強調装置。   The stiffness changing portion extends at least from a circular or elliptical circular stiffness changing portion surrounding the center of the elastic membrane member, and from the circular stiffness changing portion to the outer peripheral portion of the elastic membrane member. An intake sound enhancement according to any one of claims 5 to 7, further comprising: a radial stiffness changing portion that divides at least two portions other than a portion surrounded by the circular stiffness changing portion. apparatus. エンジンへの吸気通路をなす吸気ダクトの外周面に取り付けられて前記吸気ダクトと連通する連通管と、当該連通管を閉塞し、且つ吸気負圧の変化に応じて弾性変形することにより面外方向へ振動する弾性膜部材と、を備える吸気音強調装置において、
前記弾性膜部材は、当該弾性膜部材の面外方向へ振動する共振周波数を少なくとも二つ有することを特徴とする吸気音強調装置。
A communication pipe that is attached to the outer peripheral surface of an intake duct that forms an intake passage to the engine and communicates with the intake duct, and closes the communication pipe, and elastically deforms in response to a change in intake negative pressure, thereby causing an out-of-plane direction. Inspiratory sound emphasizing device comprising an elastic membrane member that vibrates toward
The inspiratory sound emphasizing device, wherein the elastic membrane member has at least two resonance frequencies that vibrate in an out-of-plane direction of the elastic membrane member.
JP2006155945A 2006-06-05 2006-06-05 Inspiratory sound enhancement device Expired - Fee Related JP4661695B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2006155945A JP4661695B2 (en) 2006-06-05 2006-06-05 Inspiratory sound enhancement device
DE602007011001T DE602007011001D1 (en) 2006-06-05 2007-06-04 Improvements in or related to vehicle noise
EP07109532A EP1865187B1 (en) 2006-06-05 2007-06-04 Improvements in or Relating to Vehicle Noise
CN2007101105797A CN101086240B (en) 2006-06-05 2007-06-05 Gas admission sound improvement device and method
US12/911,938 USRE42490E1 (en) 2006-06-05 2010-10-26 Device and method for amplifying suction noise

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006155945A JP4661695B2 (en) 2006-06-05 2006-06-05 Inspiratory sound enhancement device

Publications (2)

Publication Number Publication Date
JP2007321724A true JP2007321724A (en) 2007-12-13
JP4661695B2 JP4661695B2 (en) 2011-03-30

Family

ID=38523465

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006155945A Expired - Fee Related JP4661695B2 (en) 2006-06-05 2006-06-05 Inspiratory sound enhancement device

Country Status (5)

Country Link
US (1) USRE42490E1 (en)
EP (1) EP1865187B1 (en)
JP (1) JP4661695B2 (en)
CN (1) CN101086240B (en)
DE (1) DE602007011001D1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100957351B1 (en) 2008-06-23 2010-05-12 현대자동차주식회사 a air intake noise control structure for a vehicle
JP2010203394A (en) * 2009-03-05 2010-09-16 Roki Co Ltd Intake sound adjusting device

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201004447D0 (en) * 2010-03-17 2010-05-05 Trysome Ltd Mapped sound generator
JP5639794B2 (en) * 2010-06-23 2014-12-10 株式会社マーレ フィルターシステムズ Intake sound generator for internal combustion engine
CN102913355A (en) * 2012-11-02 2013-02-06 重庆大学 Single-cavity multi-resonant-frequency lateral-support resonant muffler
US9359981B1 (en) * 2015-05-08 2016-06-07 Brunswick Corporation Outboard motor with sound enhancement device and method for modifying sounds produced by air intake system of an outboard motor
US10180121B1 (en) * 2016-04-05 2019-01-15 Brunswick Corporation Outboard motor with sound enhancement device and method for modifying sounds produced by air intake system of an outboard motor
US9909545B1 (en) 2016-07-26 2018-03-06 Brunswick Corporation Outboard motor with sound enhancement device and method for modifying sounds produced by air intake system of an outboard motor
US10197022B2 (en) * 2016-12-14 2019-02-05 GM Global Technology Operations LLC Adjustable sound distribution system and a vehicle
KR102378054B1 (en) * 2017-08-25 2022-03-25 현대자동차주식회사 Exhaust sound generating device of a vehicle
US10724410B1 (en) 2017-11-14 2020-07-28 Brunswick Corporation Exhaust sound enhancement assembly and method for a marine propulsion device
CN114645808B (en) * 2021-04-16 2023-06-30 长城汽车股份有限公司 In-vehicle engine operation sound generation system and method and vehicle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002364473A (en) * 2001-03-21 2002-12-18 Daimlerchrysler Ag Device for noise configuration for automobile
JP2005139982A (en) * 2003-11-06 2005-06-02 Mahle Tennex Corp Tone quality control device for internal combustion engine
JP2005147141A (en) * 2003-11-12 2005-06-09 Filterwerk Mann & Hummel Gmbh Device for transmitting noise in automobile mounted with internal combustion engine

Family Cites Families (64)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US983416A (en) * 1909-01-23 1911-02-07 William W Young Acoustic diaphragm.
US1741841A (en) * 1922-01-26 1929-12-31 Signal Gmbh Diaphragm for acoustical apparatus
US1844487A (en) * 1928-06-14 1932-02-09 Rca Corp Diaphragm
US1856791A (en) * 1931-01-27 1932-05-03 Shida Fumio Vibrator for loud speakers
US1997790A (en) * 1931-03-07 1935-04-16 Stephen L Heidrich Acoustic diaphragm
US2531634A (en) * 1945-01-11 1950-11-28 Athol E N Lawrance Acoustical diaphragm with stiffening means
US2974204A (en) * 1954-07-06 1961-03-07 Kane Corp Du Transducer
US3032138A (en) * 1957-11-25 1962-05-01 Hawley Products Co Acoustical devices
US4100992A (en) * 1974-08-12 1978-07-18 Weber Louis Rehde Loudspeaker
US4135601A (en) * 1975-06-24 1979-01-23 Pioneer Electronic Corporation Boron coated diaphragm for use in a loud speaker
JPS55161496A (en) * 1979-05-31 1980-12-16 Matsushita Electric Ind Co Ltd Diaphragm for speaker and its production
FR2471114A1 (en) * 1979-11-28 1981-06-12 Siare LOUD SPEAKER
US4299121A (en) * 1980-03-07 1981-11-10 Mutsubishi Denki Kabushiki Kaisha Suction system in an engine
DE3379210D1 (en) * 1982-03-16 1989-03-23 Matsushita Electric Ind Co Ltd Diaphragm for loudspeakers
AT373754B (en) * 1982-04-08 1984-02-27 Akg Akustische Kino Geraete MEMBRANE FOR MICROPHONES
JPH0728478B2 (en) * 1984-12-28 1995-03-29 幅 秀幸 Speaker
US4655316A (en) * 1985-03-13 1987-04-07 Jbl Incorporated Acoustic diaphragm
NL8602451A (en) * 1986-09-29 1988-04-18 Philips Nv SPEAKER WITH A TWO-PIECE MEMBRANE FOR USE AS A CAR SPEAKER.
US5304746A (en) * 1990-06-19 1994-04-19 Purvine Harold O Reduction of standing waves and intermodulation distortion in electro-acoustic transducer
US5256837A (en) * 1991-10-30 1993-10-26 Pak Il Y Paper cone for cone type speaker
US5349141A (en) * 1992-08-31 1994-09-20 Tsuchiya Mfg. Co., Ltd. Resonator type silencer having plural resonance chambers
CA2153855A1 (en) * 1994-09-02 1996-03-03 Donald Robert Demorest Acoustic quarter wave tube absorber
US5937074A (en) * 1996-08-12 1999-08-10 Carver; Robert W. High back emf, high pressure subwoofer having small volume cabinet, low frequency cutoff and pressure resistant surround
WO1997039464A1 (en) * 1996-04-18 1997-10-23 California Institute Of Technology Thin film electret microphone
DE19704376A1 (en) * 1997-02-06 1998-08-13 Knecht Filterwerke Gmbh Air filter for IC engine
JP2000045895A (en) 1998-07-23 2000-02-15 Toyota Motor Corp Engine tone quality emphasizing device
US5996733A (en) * 1998-11-20 1999-12-07 Thermo King Corporation Dual frequency side branch resonator
US6675931B2 (en) * 1998-11-30 2004-01-13 Joseph Yaacoub Sahyoun Low profile audio speaker
US6044925A (en) * 1998-11-30 2000-04-04 Sahyoun; Joseph Yaacoub Passive speaker
US6704426B2 (en) * 1999-03-02 2004-03-09 American Technology Corporation Loudspeaker system
JP3613665B2 (en) 1999-04-16 2005-01-26 トヨタ自動車株式会社 Intake device for internal combustion engine for automobile
DE19922216A1 (en) * 1999-05-14 2000-11-30 Mahle Filtersysteme Gmbh Sound transmission device for a motor vehicle
DE19940610A1 (en) * 1999-08-27 2001-03-01 Mann & Hummel Filter Air filter
DE19962888A1 (en) * 1999-12-24 2001-06-28 Mahle Filtersysteme Gmbh Filters, especially intake air filters
US6634456B2 (en) * 2001-02-09 2003-10-21 Meiloon Industrial Co., Ltd. Vibrating diaphragm of false speaker structure
DE10116169C2 (en) * 2001-03-31 2003-11-06 Mahle Filtersysteme Gmbh Sound transmission device for a motor vehicle
US6932189B2 (en) * 2001-09-24 2005-08-23 Daimlerchrysler Ag Device for noise structuring in a motor vehicle
US20050121255A1 (en) * 2002-05-29 2005-06-09 Marcus Hofmann Device for establishing noise in a motor vehicle
US20050133300A1 (en) * 2002-05-29 2005-06-23 Marcus Hofmann Device for establishing noise in a motor vehicle
US20050121254A1 (en) * 2002-05-29 2005-06-09 Marcus Hofmann Device for establishing noise in a motor vehicle
DE10223873A1 (en) * 2002-05-29 2003-12-11 Daimler Chrysler Ag Device for noise shaping in a motor vehicle
FR2840652B1 (en) * 2002-06-07 2006-09-01 Trelleborg Automotive France DEVICE FOR ATTENUATING NOISE FROM THE OPERATION OF THE INTERNAL COMBUSTION ENGINE AND / OR THE AIR CONDITIONING SYSTEM OF A VEHICLE
CN1714597B (en) * 2002-11-21 2011-05-11 Nxp股份有限公司 Electroacoustic transducer comprising a membrane with a middle area comprising stiffening grooves
DE112004002158T5 (en) * 2003-11-06 2006-11-02 Mahle Filter Systems Japan Corp. Intake device of an internal combustion engine
JP4561960B2 (en) * 2004-01-23 2010-10-13 フォスター電機株式会社 Speaker diaphragm
WO2005099300A1 (en) * 2004-03-31 2005-10-20 Matsushita Electric Industrial Co., Ltd. Speaker device
US7477755B2 (en) * 2004-04-13 2009-01-13 Panasonic Corporation Speaker system
US7483545B2 (en) * 2004-07-07 2009-01-27 Tadashi Nagaoka Acoustic diaphragm
DE102004041698B4 (en) * 2004-08-28 2014-02-13 Mann + Hummel Gmbh Device for transmitting noise in a motor vehicle
DE102004041699A1 (en) * 2004-08-28 2006-03-02 Mann + Hummel Gmbh Device for transmitting noise in a motor vehicle
US7974431B2 (en) * 2004-09-13 2011-07-05 Panasonic Corporation Speaker system
JP2006125381A (en) * 2004-09-29 2006-05-18 Toyoda Gosei Co Ltd Resonator
JP2006194165A (en) * 2005-01-14 2006-07-27 Denso Corp Suction device
JP4689363B2 (en) * 2005-06-20 2011-05-25 日産自動車株式会社 Sound increaser
US7353791B2 (en) * 2005-10-07 2008-04-08 Nissan Motor Co., Ltd. Sound increase apparatus
JP4321514B2 (en) * 2005-11-08 2009-08-26 トヨタ自動車株式会社 Intake device for internal combustion engine
EP1808594A1 (en) * 2006-01-13 2007-07-18 Denso Corporation Intake muffler
US20070261912A1 (en) * 2006-05-11 2007-11-15 Altec Lansing Technologies, Inc. Integrated audio speaker surround
JP4661694B2 (en) * 2006-06-05 2011-03-30 日産自動車株式会社 Intake sound increaser
JP4277876B2 (en) * 2006-06-16 2009-06-10 ヤマハ株式会社 Speaker system and speaker enclosure
US20080149201A1 (en) * 2006-12-22 2008-06-26 General Electric Company Sleeve insert for mitigating acoustic cavity resonances and related method
US8224009B2 (en) * 2007-03-02 2012-07-17 Bose Corporation Audio system with synthesized positive impedance
JP2009007996A (en) * 2007-06-27 2009-01-15 Denso Corp Tone quality controller of internal combustion engine
JP4356780B2 (en) * 2007-08-01 2009-11-04 株式会社デンソー Intake device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002364473A (en) * 2001-03-21 2002-12-18 Daimlerchrysler Ag Device for noise configuration for automobile
JP2005139982A (en) * 2003-11-06 2005-06-02 Mahle Tennex Corp Tone quality control device for internal combustion engine
JP2005147141A (en) * 2003-11-12 2005-06-09 Filterwerk Mann & Hummel Gmbh Device for transmitting noise in automobile mounted with internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100957351B1 (en) 2008-06-23 2010-05-12 현대자동차주식회사 a air intake noise control structure for a vehicle
JP2010203394A (en) * 2009-03-05 2010-09-16 Roki Co Ltd Intake sound adjusting device

Also Published As

Publication number Publication date
EP1865187A2 (en) 2007-12-12
USRE42490E1 (en) 2011-06-28
EP1865187A3 (en) 2008-12-24
EP1865187B1 (en) 2010-12-08
CN101086240A (en) 2007-12-12
DE602007011001D1 (en) 2011-01-20
JP4661695B2 (en) 2011-03-30
CN101086240B (en) 2010-06-09

Similar Documents

Publication Publication Date Title
JP4661695B2 (en) Inspiratory sound enhancement device
US7448353B2 (en) Intake device of internal combustion engine
JP4661694B2 (en) Intake sound increaser
JP4993755B2 (en) Intake sound generator
JP5639794B2 (en) Intake sound generator for internal combustion engine
US7556123B2 (en) Muffler duct
JP4328181B2 (en) Sound quality control device for internal combustion engine
JP2008025472A (en) Noise reducing device
JP2008025473A (en) Noise reducing device
WO2013089010A1 (en) Air intake device for internal combustion engine
JP2009202682A (en) Duct device for air conditioning
JP2007170228A (en) Tone quality transmission structure
CN107314186B (en) Ventilating pipe with silencer
JP2009209830A (en) Intake noise control device
US11781510B2 (en) Engine intake system
CN107035580A (en) The air-suction-noise reduction device of internal combustion engine
JP5389477B2 (en) Intake sound adjustment device
JP2009030505A (en) Intake sound amplifying device
JP5859371B2 (en) Air intake duct with silencer
JP2007177717A (en) Device for amplifying intake noise
JP6319253B2 (en) Intake sound amplifier for internal combustion engine
JP2007231882A (en) Venting device having sound-absorbing function
US11598298B2 (en) Engine intake system
JP7376525B2 (en) Internal combustion engine intake duct
KR101119700B1 (en) Device for Decreasing Intake Noise of Vehicle

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090325

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20100917

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20101014

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20101026

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20101111

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20101207

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20101220

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140114

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees