JP4247857B2 - Silence structure of the intake system in motorcycles - Google Patents

Silence structure of the intake system in motorcycles Download PDF

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Publication number
JP4247857B2
JP4247857B2 JP19059499A JP19059499A JP4247857B2 JP 4247857 B2 JP4247857 B2 JP 4247857B2 JP 19059499 A JP19059499 A JP 19059499A JP 19059499 A JP19059499 A JP 19059499A JP 4247857 B2 JP4247857 B2 JP 4247857B2
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Prior art keywords
resonator
air cleaner
cleaner case
spare
chamber
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JP2001020812A (en
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和孝 南
智之 武若
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、既存の部品を利用して吸気系のスペースの有効利用を図り、また、コストアップを抑えるのに好適な自動二輪車の吸気系の消音構造に関する。
【０００２】
【従来の技術】
エンジン運転中、エアクリーナからはエアを吸込む時の吸気音が発生するため、通常、吸気系にレゾネータを取付けて上記した吸気音の低減を図っている。
レゾネータは、吸気系の途中に開口を有する閉空間を設け、この閉空間の空気を吸気音に共鳴させることで吸気音を減衰させるものである。
【０００３】
以下に示す図８で吸気系にレゾネータを取付けた例を説明する。
図８は従来のエアクリーナ装置の側面図であり、エアクリーナ装置１００は、エアクリーナケース１０１と、このエアクリーナケース１０１に図示せぬキャブレタを連通させる吸気管１０２と、この吸気管１０２内と連通させるために吸気管１０２外面に取付けたレゾネータ１０３とからなる。
【０００４】
【発明が解決しようとする課題】
上記エアクリーナ装置１００を自動二輪車に採用する場合、自動二輪車には補機部品を取付けことができるスペースが少ないため、吸気音減衰のためにレゾネータ１０３において必要な寸法や容積を確保しようとすると、吸気管１０２やエアクリーナケース１０１、更には他部品の形状の変更が必要になり、コストアップを招く。
【０００５】
そこで、本発明の目的は、既存の部品を利用して吸気系のスペースの有効利用を図るとともに、コストアップを抑えつつ吸気音を低減することができる自動二輪車の吸気系の消音構造を提供することにある。
【０００６】
【課題を解決するための手段】
上記目的を達成するために請求項１は、ヘッドパイプから後方へ車体フレームを延ばし、この車体フレームに沿ってエアクリーナケース及び工具などの小物を収納する収納ボックスを互いに近接させて配置し、これらのエアクリーナケース及び収納ボックスの外側方をサイドカバーで一括して覆った自動二輪車において、前記収納ボックスを、仕切壁にて小物収納室と予備室とに区分し、この予備室をエアクリーナケースに近接させ、且つ予備室のサイドカバー寄りの面を開口とし、このような予備室の奥にエアクリーナケースの空気入口管の先端を差し込み、且つ予備室にレゾネータを配置し、予備室の側壁と空気入口管の外面との間の空間にレゾネータの外部連通管の開口を臨ませ、サイドカバーと収納ボックスとの隙間から進入した空気を前記開口から取入れ、レゾネータで吸気音を減衰させつつ、空気入口管を介してエアクリーナケースへ送り込むように構成したことを特徴とする。
【０００７】
自動二輪車の車体フレームに沿って互いに近接させて配置したエアクリーナケース及び収納ボックスの外側方をサイドカバーで一括して覆い、サイドカバーと収納ボックスとの隙間から進入した空気を、収納ボックス内で区分した予備室のサイドカバー寄りの開口から取入れ、レゾネータで吸気音を減衰させつつ、予備室に先端を差込んだ空気入口管を介してエアクリーナケースへ送り込む。
【０００８】
この結果、既存の収納ボックス内の予備室にレゾネータを収納するため、レゾネータを別にエアクリーナケース周りの外面に付設するのに比較して、エアクリーナケース周りのスペースを有効に利用することができ、また、レゾネータ付設に伴うエアクリーナケース周りの部品の形状変更を少なくすることができて、コストアップを抑えることができる。
【０００９】
請求項２は、予備室の底部にレゾネータの共鳴箱を取付け、この共鳴箱から予備室の開口側に外部連通管を延ばし、予備室の開口近くで外部連通管を開口させたことを特徴とする。
【００１０】
【発明の実施の形態】
本発明の実施の形態を添付図に基づいて以下に説明する。なお、図面は符号の向きに見るものとする。
図１は本発明に係る吸気系の消音構造を採用した自動二輪車の側面図であり、自動二輪車１０は、車体フレーム１１の前部に取付けたヘッドパイプ１２と、このヘッドパイプ１２に繰舵可能に取付けたフロントフォーク１３及びこのフロントフォーク１３の下部に取付けた前輪１４と、フロントフォーク１３の上部に一体的に取付けたハンドル１５と、車体フレーム１１の上部に取付けた燃料タンク１６と、この燃料タンク１６の下方の車体フレーム１１に取付けたエンジン１７及び変速機１８とからなるパワーユニット１９と、車体フレーム１１の後部下部にスイング可能に取付けたスイングアーム２１と、このスイングアーム２１の後端に取付けた後輪２２と、スイングアーム２１と車体フレーム１１の後部とに渡したリヤクッションユニット２３と、燃料タンク１６の後方に配置したシート２４と、このシート２４の前部の下方で車体フレーム１１に沿って配置したエアクリーナケース２５及びこのエアクリーナケース２５の後方に近接して配置した収納ボックス２６と、これらのエアクリーナケース２５及び収納ボックス２６の外側方を一括して覆ったサイドカバー２７とからなる。
【００１１】
ここで、３１はヘッドランプ、３２はキャブレタ、３３はエンジン１７とキャブレタ３２とを連通させる吸気管、３４はキャブレタ３２とエアクリーナケース２５とを連通するコネクティングチューブ、３５は後部キャリア、３６はテールランプである。
【００１２】
図２は本発明に係る吸気系の消音構造を示す側面図であり、サイドカバー２７を外してエアクリーナケース２５と収納ボックス２６とを示したものである。
エアクリーナケース２５は、後部に外気を内部に取り込むための空気入口管としての吸込管４１を備え、車体フレーム１１の側方にボルト４２，４２で取付けたものである。
【００１３】
収納ボックス２６は、仕切壁４４にて小物収納室４５と予備室４６とに区分し、この予備室４６をエアクリーナケース２５に近接させ、且つ予備室４６のサイドカバー２７寄りの面（手前側の面）を開口４７とし、予備室４６側の第１側壁４８を切欠いてエアクリーナケース２５の吸込管４１を貫通させ、このような予備室４６に吸込管４１の先端を差し込んだものである。なお、５１，５１は収納ボックス２６を車体フレーム１１の側方に取付けるためのボルトである。
【００１４】
小物収納室４５は、ケースに入れた工具Ｔなどを収納するものである。
予備室４６は、本来、収納の予備として、例えば、後部キャリア３５（図１参照）に積みにくいものや小物収納室４５に収納しきれないものを収納するものであり、使い勝手が良い小物入れであるが、後部キャリア３５に積んだバッグ等に小物を入れるようにすれば、予備室４６が使えなくなっても上記バッグ等で予備室４６の代用ができる。
【００１５】
図３は本発明に係る吸気系の消音構造の斜視図であり、収納ボックス２６における予備室４６の底部５２にビス５３，５３（一方の符号５３は不図示）でレゾネータ５４を取付けたことを示す。
予備室４６は、第１側壁４８、第２側壁５５、仕切壁４４及び第３側壁５６という４つの側壁と、底部５２とで囲まれるとともに前述の開口４７を有する空間である。
レゾネータ５４は、空気を共鳴させる共鳴箱５７と、この共鳴箱５７内を外部に連通させる外部連通管５８とからなる。
【００１６】
図４は図２の４−４線断面図であり、エアクリーナケース２５及び収納ボックス２６の外側方をサイドカバー２７で一括して覆い、また、エアクリーナケース２５の吸込管４１の先端部をＬ字断面とし、予備室４６の奥に吸込管４１の先端を差し込んだことを示す。
【００１７】
エアクリーナケース２５への吸入空気の通路は、（１）エアクリーナケース２５及び収納ボックス２６とサイドカバー２７との間の隙間Ａ、（２）開口４７、（３）予備室４６の第１側壁４８、第２側壁５５、仕切壁４４及び第３側壁５６（図３参照）の４つの側壁と吸込管４１の外面との間の空間Ｂ、（４）吸込管４１の先端とレゾネータ５４外面との間の空間Ｃ、（５）吸込管４１内、となる。
【００１８】
図５は図２の５−５線断面図であり、図４で示した予備室４６の４つの側壁と吸込管４１の外面との間の空間Ｂにレゾネータ５４の外部連通管５８の開口６１を臨ませたことを示す。
レゾネータ５４は、吸気音に共鳴させるために、共鳴箱５７内を所定容積Ｖ、外部連通管５８を所定内径Ｄ及び所定長さＳとしたものである。
【００１９】
以上に述べたレゾネータ５４の作用を次に説明する。
図６は本発明に係るレゾネータの作用を説明する模式図であり、吸入空気は、矢印で示すように、まず、隙間Ａを通り、予備室４６の開口４７から、予備室４６の空間Ｂに至る。
この後、空間Ｂ内の吸入空気は吸込管４１内に入り、エアクリーナケース２５を経てキャブレタに至る。
【００２０】
この時、吸気音はレゾネータ５４内に伝わり、レゾネータ５４内の空気は吸気音の主となる周波数成分に共鳴するとともに、逆位相となってレゾネータ５４内から再び空間Ｂ内に伝わる。
この結果、空間Ｂ内の吸気音とレゾネータ５４で逆位相となった音とが打ち消し合い、吸気音が減衰する。
【００２１】
図７（ａ），（ｂ）は本発明に係るレゾネータの別の実施の形態を示す断面図である。
（ａ）は、レゾネータ６４を、空気を共鳴させる共鳴箱６５と、この共鳴箱６５内を外部に連通させる外部連通管６６とから構成し、吸込管４１の開口４１ａに外部連通管６６の開口６７を対向させたことを示す。
（ｂ）は、レゾネータ７４を、空気を共鳴させる共鳴箱７５と、この共鳴箱７５内を外部に連通させる外部連通管７６とから構成し、吸込管４１内に外部連通管７６を挿入し、吸込管４１内に外部連通管７６の開口７７を臨ませたことを示す。
【００２２】
以上の図１、図４で説明したように、本発明は、ヘッドパイプ１２（図１参照）から後方へ車体フレーム１１を延ばし、この車体フレーム１１に沿ってエアクリーナケース２５及び工具Ｔなどの小物を収納する収納ボックス２６を互いに近接させて配置し、これらのエアクリーナケース２５及び収納ボックス２６の外側方をサイドカバー２７で一括して覆った自動二輪車１０において、収納ボックス２６を、仕切壁４４にて小物収納室４５と予備室４６とに区分し、この予備室４６をエアクリーナケース２５に近接させ、且つ予備室４６のサイドカバー２７寄りの面を開口４７とし、このような予備室４６にエアクリーナケース２５の吸込管４１の先端を差し込み、且つ予備室４６にレゾネータ５４を配置し、図６に示したように、サイドカバー２７と収納ボックス２６との隙間Ａから進入した空気を開口４７から取入れ、レゾネータ５４で吸気音を減衰させつつ、吸込管４１を介してエアクリーナケース２５へ送り込むように構成したことを特徴とする。
【００２３】
この結果、既存の収納ボックス２６内の予備室４６にレゾネータ５４を収納するため、レゾネータを別にエアクリーナケース周りの外面に付設するのに比較して、エアクリーナケース２５周りのスペースを有効に利用することができ、また、レゾネータ５４付設に伴うエアクリーナケース２５周りの部品の形状変更（この場合には、吸込管４１の先端部をレゾネータ５４側に折曲げたこと）を少なくすることができて、コストアップを抑えることができる。
【００２４】
尚、図４に示した予備室４６内の吸込管４１及びレゾネータ５４のそれぞれの形状、位置は、これに限るものではなく、例えば、吸込管４１の先端を予備室４６の底部５２（図３参照）に近接させ、レゾネータ５４の共鳴箱５７を予備室４６の４つの側壁の一つに取付けてもよい。
【００２５】
【発明の効果】
本発明は上記構成により次の効果を発揮する。
請求項１の自動二輪車における吸気系の消音構造は、収納ボックスを、仕切壁にて小物収納室と予備室とに区分し、この予備室をエアクリーナケースに近接させ、且つ予備室のサイドカバー寄りの面を開口とし、このような予備室の奥にエアクリーナケースの空気入口管の先端を差し込み、且つ予備室にレゾネータを配置し、予備室の側壁と空気入口管の外面との間の空間にレゾネータの外部連通管の開口を臨ませたので、レゾネータを別にエアクリーナケース周りの外面に付設するのに比較して、エアクリーナケース周りのスペースを有効に利用することができ、また、レゾネータ付設に伴うエアクリーナケース周りの部品の形状変更を少なくすることができて、コストアップを抑えることができる。
【００２６】
請求項２の自動二輪車における吸気系の消音構造は、予備室の底部にレゾネータの共鳴箱を取付け、この共鳴箱から予備室の開口側に外部連通管を延ばし、予備室の開口近くで外部連通管を開口させた。
【図面の簡単な説明】
【図１】 本発明に係る吸気系の消音構造を採用した自動二輪車の側面図
【図２】 本発明に係る吸気系の消音構造を示す側面図
【図３】 本発明に係る吸気系の消音構造の斜視図
【図４】 図２の４−４線断面図
【図５】 図２の５−５線断面図
【図６】 本発明に係るレゾネータの作用を説明する模式図
【図７】 本発明に係るレゾネータの別の実施の形態を示す断面図
【図８】 従来のエアクリーナ装置の側面図
【符号の説明】
１０…自動二輪車、１１…車体フレーム、１２…ヘッドパイプ、２５…エアクリーナケース、２６…収納ボックス、２７…サイドカバー、４１…空気入口管（吸込管）、４４…仕切壁、４４，４８，５５，５６…予備室の側壁（仕切壁、第１側壁、第２側壁、第３側壁）、４５…小物収納室、４６…予備室、４７…予備室の開口、５２…予備室の底部、５４…レゾネータ、５７…共鳴箱、５８…外部連通管、６１…外部連通管の開口、Ｔ…工具、Ｂ…空間。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a silencing structure for an intake system of a motorcycle that is suitable for effectively utilizing the space of the intake system by using existing parts and suppressing cost increase.
[0002]
[Prior art]
During engine operation, an air intake sound is generated from the air cleaner, so a resonator is usually attached to the air intake system to reduce the above intake sound.
The resonator provides a closed space having an opening in the middle of the intake system, and attenuates the intake sound by causing the air in the closed space to resonate with the intake sound.
[0003]
An example in which a resonator is attached to the intake system will be described with reference to FIG.
FIG. 8 is a side view of a conventional air cleaner apparatus. The air cleaner apparatus 100 communicates with an air cleaner case 101, an intake pipe 102 that communicates a carburetor (not shown) with the air cleaner case 101, and the interior of the intake pipe 102. The resonator 103 is attached to the outer surface of the intake pipe 102.
[0004]
[Problems to be solved by the invention]
When the air cleaner device 100 is employed in a motorcycle, there is little space in which the accessory parts can be attached to the motorcycle. Therefore, if the size and volume necessary for the resonator 103 to attenuate the intake noise are to be secured, It is necessary to change the shape of the pipe 102, the air cleaner case 101, and other parts, resulting in an increase in cost.
[0005]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a noise reduction structure for an intake system of a motorcycle capable of effectively using an intake system space by using existing parts and reducing intake noise while suppressing an increase in cost. There is.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the first aspect extends the vehicle body frame rearward from the head pipe, and arranges storage boxes for storing small items such as an air cleaner case and tools along the vehicle body frame in close proximity to each other. In a motorcycle in which the outer side of the air cleaner case and the storage box are collectively covered with a side cover, the storage box is divided into an accessory storage room and a spare room by a partition wall, and the spare room is brought close to the air cleaner case. In addition, the front surface of the spare chamber close to the side cover is opened, the tip of the air inlet pipe of the air cleaner case is inserted into the back of the spare chamber, and a resonator is disposed in the spare chamber, and the side wall of the spare chamber and the air inlet tube sky of the outer surface space is faced to the opening of the external communicating pipe resonator between, it enters from the gap between the side cover and the storage box The intake from the opening, while attenuating intake noise in the resonator through the air inlet pipe, characterized by being configured to pump the air cleaner case.
[0007]
Cover the outside of the air cleaner case and storage box placed close to each other along the motorcycle body frame with a side cover, and classify the air that has entered through the gap between the side cover and the storage box in the storage box. The air is taken in from the opening near the side cover of the spare chamber and is sent to the air cleaner case through the air inlet pipe whose tip is inserted into the spare chamber while the intake sound is attenuated by the resonator.
[0008]
As a result, since the resonator is stored in the spare room in the existing storage box, the space around the air cleaner case can be used more effectively than when the resonator is separately attached to the outer surface around the air cleaner case. Further, it is possible to reduce the shape change of the parts around the air cleaner case due to the attachment of the resonator, and it is possible to suppress the cost increase.
[0009]
Claim 2 is characterized in that a resonance box of a resonator is attached to the bottom of the spare chamber, an external communication pipe is extended from the resonance box to the opening side of the spare room, and an external communication pipe is opened near the opening of the spare room. To do.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view of a motorcycle employing an intake system silencing structure according to the present invention. The motorcycle 10 can be steered to a head pipe 12 attached to a front portion of a body frame 11 and the head pipe 12. A front fork 13 attached to the front fork 13, a front wheel 14 attached to the lower part of the front fork 13, a handle 15 attached integrally to the upper part of the front fork 13, a fuel tank 16 attached to the upper part of the body frame 11, and the fuel A power unit 19 including an engine 17 and a transmission 18 attached to the body frame 11 below the tank 16, a swing arm 21 attached to the lower rear portion of the body frame 11 so as to be swingable, and attached to a rear end of the swing arm 21. The rear cushion unit passed to the rear wheel 22, the swing arm 21 and the rear part of the vehicle body frame 11. , The seat 24 disposed behind the fuel tank 16, the air cleaner case 25 disposed along the vehicle body frame 11 below the front portion of the seat 24, and the rear of the air cleaner case 25. The storage box 26 includes an air cleaner case 25 and a side cover 27 that collectively covers the outside of the storage box 26.
[0011]
Here, 31 is a headlamp, 32 is a carburetor, 33 is an intake pipe for communicating the engine 17 and the carburetor 32, 34 is a connecting tube for communicating the carburetor 32 and the air cleaner case 25, 35 is a rear carrier, and 36 is a tail lamp. is there.
[0012]
FIG. 2 is a side view showing an air intake silencer structure according to the present invention, and shows the air cleaner case 25 and the storage box 26 with the side cover 27 removed.
The air cleaner case 25 is provided with a suction pipe 41 as an air inlet pipe for taking outside air into the rear part, and is attached to the side of the body frame 11 with bolts 42 and 42.
[0013]
The storage box 26 is divided into an accessory storage chamber 45 and a spare chamber 46 by a partition wall 44, the spare chamber 46 is brought close to the air cleaner case 25 and the surface of the spare chamber 46 near the side cover 27 (on the front side). The first side wall 48 on the side of the auxiliary chamber 46 is cut out to penetrate the suction pipe 41 of the air cleaner case 25, and the tip of the inlet pipe 41 is inserted into the auxiliary chamber 46. Reference numerals 51 and 51 denote bolts for attaching the storage box 26 to the side of the vehicle body frame 11.
[0014]
The accessory storage chamber 45 stores a tool T or the like put in a case.
The spare chamber 46 is originally intended to be a spare for storing, for example, one that is difficult to stack on the rear carrier 35 (see FIG. 1) or one that cannot be stored in the accessory storage chamber 45. However, if small items are put in a bag or the like loaded on the rear carrier 35, the bag or the like can be substituted for the spare chamber 46 even if the spare chamber 46 cannot be used.
[0015]
FIG. 3 is a perspective view of the silencer structure of the intake system according to the present invention, in which a resonator 54 is attached to the bottom 52 of the auxiliary chamber 46 in the storage box 26 with screws 53 and 53 (one reference numeral 53 is not shown). Show.
The preliminary chamber 46 is a space that is surrounded by four side walls, that is, a first side wall 48, a second side wall 55, a partition wall 44, and a third side wall 56, and the bottom portion 52 and has the above-described opening 47.
The resonator 54 includes a resonance box 57 that resonates air and an external communication pipe 58 that communicates the inside of the resonance box 57 with the outside.
[0016]
4 is a cross-sectional view taken along line 4-4 of FIG. 2, and the outside of the air cleaner case 25 and the storage box 26 are collectively covered with the side cover 27, and the tip of the suction pipe 41 of the air cleaner case 25 is L-shaped. The cross section shows that the tip of the suction pipe 41 is inserted into the back of the preliminary chamber 46.
[0017]
The intake air passage to the air cleaner case 25 is (1) a gap A between the air cleaner case 25 and the storage box 26 and the side cover 27, (2) an opening 47, (3) a first side wall 48 of the spare chamber 46, A space B between the four side walls of the second side wall 55, the partition wall 44 and the third side wall 56 (see FIG. 3) and the outer surface of the suction pipe 41, (4) Between the tip of the suction pipe 41 and the outer surface of the resonator 54 (5) In the suction pipe 41.
[0018]
5 is a cross-sectional view taken along line 5-5 of FIG. 2, and an opening 61 of the external communication pipe 58 of the resonator 54 is formed in the space B between the four side walls of the preliminary chamber 46 and the outer surface of the suction pipe 41 shown in FIG. Indicates that
The resonator 54 has a predetermined volume V in the resonance box 57 and a predetermined inner diameter D and a predetermined length S in the resonance box 57 in order to resonate with the intake sound.
[0019]
Next, the operation of the resonator 54 described above will be described.
FIG. 6 is a schematic diagram for explaining the operation of the resonator according to the present invention. As shown by arrows, the intake air first passes through the gap A and enters the space B of the spare chamber 46 from the opening 47 of the spare chamber 46. It reaches.
Thereafter, the intake air in the space B enters the suction pipe 41 and reaches the carburetor through the air cleaner case 25.
[0020]
At this time, the intake sound is transmitted to the resonator 54, and the air in the resonator 54 resonates with the main frequency component of the intake sound and is transmitted in the space B again from the resonator 54 in the opposite phase.
As a result, the intake sound in the space B and the sound having the opposite phase from the resonator 54 cancel each other, and the intake sound is attenuated.
[0021]
7A and 7B are sectional views showing another embodiment of the resonator according to the present invention.
(A) includes a resonator 64 that includes a resonance box 65 that resonates air, and an external communication pipe 66 that allows the inside of the resonance box 65 to communicate with the outside, and the opening 41 a of the suction pipe 41 is connected to the opening of the external communication pipe 66. It shows that 67 was made to oppose.
(B) comprises a resonator 74 comprising a resonance box 75 that resonates air and an external communication pipe 76 that allows the inside of the resonance box 75 to communicate with the outside, and the external communication pipe 76 is inserted into the suction pipe 41. It shows that the opening 77 of the external communication pipe 76 is exposed in the suction pipe 41.
[0022]
As described above with reference to FIGS. 1 and 4, the present invention extends the vehicle body frame 11 rearward from the head pipe 12 (see FIG. 1), and small items such as the air cleaner case 25 and the tool T along the vehicle body frame 11. In the motorcycle 10 in which the storage boxes 26 for storing the vehicle are disposed close to each other and the outside of the air cleaner case 25 and the storage box 26 are collectively covered with the side cover 27, the storage box 26 is placed on the partition wall 44. The accessory chamber 45 is divided into a spare chamber 46, the spare chamber 46 is brought close to the air cleaner case 25, and the surface of the spare chamber 46 near the side cover 27 is formed as an opening 47. The tip of the suction pipe 41 of the case 25 is inserted, and a resonator 54 is disposed in the spare chamber 46, and as shown in FIG. The air that has entered through the opening 47 between the air inlet 27 and the storage box 26 is taken from the opening 47, and the intake sound is attenuated by the resonator 54 while being sent to the air cleaner case 25 through the suction pipe 41. .
[0023]
As a result, in order to store the resonator 54 in the spare chamber 46 in the existing storage box 26, the space around the air cleaner case 25 can be used more effectively than when the resonator is separately attached to the outer surface around the air cleaner case. In addition, the shape change of parts around the air cleaner case 25 accompanying the attachment of the resonator 54 (in this case, the tip of the suction pipe 41 is bent toward the resonator 54) can be reduced, and the cost can be reduced. You can suppress the up.
[0024]
The shapes and positions of the suction pipe 41 and the resonator 54 in the preliminary chamber 46 shown in FIG. 4 are not limited to this. For example, the tip of the suction pipe 41 is connected to the bottom 52 of the preliminary chamber 46 (FIG. 3). The resonance box 57 of the resonator 54 may be attached to one of the four side walls of the spare chamber 46.
[0025]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
The silencer structure of the intake system in the motorcycle according to claim 1 divides the storage box into an accessory storage chamber and a spare chamber by a partition wall, and makes the spare chamber close to the air cleaner case and close to the side cover of the spare chamber. The front of the air cleaner case is inserted into the back of such a spare chamber, and a resonator is placed in the spare chamber, and a space between the side wall of the spare chamber and the outer surface of the air inlet tube is provided. Since the opening of the external communication pipe of the resonator is faced, the space around the air cleaner case can be used more effectively than when the resonator is separately attached to the outer surface around the air cleaner case. The shape change of the parts around the air cleaner case can be reduced, and the cost increase can be suppressed.
[0026]
The silencer structure of the intake system in the motorcycle according to claim 2 is characterized in that a resonance box of a resonator is attached to the bottom of the spare room, an external communication pipe is extended from the resonance box to the opening side of the spare room, and external communication is performed near the opening of the spare room. The tube was opened.
[Brief description of the drawings]
FIG. 1 is a side view of a motorcycle adopting an intake system silencing structure according to the present invention. FIG. 2 is a side view showing an intake system silencing structure according to the present invention. FIG. 4 is a sectional view taken along line 4-4 in FIG. 2. FIG. 5 is a sectional view taken along line 5-5 in FIG. 2. FIG. 6 is a schematic diagram for explaining the operation of the resonator according to the present invention. FIG. 8 is a sectional view showing another embodiment of the resonator according to the present invention. FIG. 8 is a side view of a conventional air cleaner apparatus.
DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 11 ... Body frame, 12 ... Head pipe, 25 ... Air cleaner case, 26 ... Storage box, 27 ... Side cover, 41 ... Air inlet pipe (suction pipe), 44 ... Partition wall, 44, 48 , 55 , 56 ... preliminary chamber wall (partition wall, first side wall, second side wall, a third side wall), 45 ... small storage room, 46 ... preliminary chamber, 47 ... preliminary chamber opening, the bottom of 52 ... preliminary chamber, 54 ... resonator, 57 ... resonance box, 58 ... external communication pipe, 61 ... opening of external communication pipe, T ... tool , B ... space .

Claims (2)

ヘッドパイプから後方へ車体フレームを延ばし、この車体フレームに沿ってエアクリーナケース及び工具などの小物を収納する収納ボックスを互いに近接させて配置し、これらのエアクリーナケース及び収納ボックスの外側方をサイドカバーで一括して覆った自動二輪車において、
前記収納ボックスを、仕切壁にて小物収納室と予備室とに区分し、この予備室をエアクリーナケースに近接させ、且つ予備室のサイドカバー寄りの面を開口とし、このような予備室の奥にエアクリーナケースの空気入口管の先端を差し込み、且つ予備室にレゾネータを配置し、予備室の側壁と空気入口管の外面との間の空間にレゾネータの外部連通管の開口を臨ませ、
サイドカバーと収納ボックスとの隙間から進入した空気を前記開口から取入れ、レゾネータで吸気音を減衰させつつ、空気入口管を介してエアクリーナケースへ送り込むように構成したことを特徴とする自動二輪車における吸気系の消音構造。The vehicle body frame is extended rearward from the head pipe, and an air cleaner case and a storage box for storing small items such as tools are arranged close to each other along the vehicle body frame, and the outside of the air cleaner case and the storage box is covered with a side cover. In a motorcycle covered in a lump ,
The previous Symbol storage box, divided into a small storage room and a spare room at the partition wall, the preliminary chamber is brought close to the air cleaner case, and the side cover side of the surface of the preliminary chamber to the opening, of such spare room Insert the tip of the air inlet pipe of the air cleaner case in the back , arrange the resonator in the spare chamber, face the opening of the external communication pipe of the resonator in the space between the side wall of the spare chamber and the outer surface of the air inlet pipe,
Intake in a motorcycle, which is configured to take in air that has entered through a gap between the side cover and the storage box from the opening, and send the air through the air inlet pipe to the air cleaner case while attenuating the intake sound with a resonator. System silence structure. 前記予備室の底部に前記レゾネータの共鳴箱を取付け、この共鳴箱から予備室の前記開口側に外部連通管を延ばし、予備室の前記開口近くで前記外部連通管を開口させたことを特徴とする請求項１記載の自動二輪車における吸気系の消音構造。A resonance box of the resonator is attached to the bottom of the spare chamber, an external communication pipe is extended from the resonance box to the opening side of the spare room, and the external communication pipe is opened near the opening of the spare chamber. 2. A silencer structure for an intake system in a motorcycle according to claim 1.
JP19059499A 1999-07-05 1999-07-05 Silence structure of the intake system in motorcycles Expired - Fee Related JP4247857B2 (en)

Priority Applications (2)

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JP19059499A JP4247857B2 (en) 1999-07-05 1999-07-05 Silence structure of the intake system in motorcycles
IDP20000556A ID26466A (en) 1999-07-05 2000-07-04 STRUCTURE OF NOISE REDUCER ENTERING FROM THE ENTRY SYSTEM IN THE MOTORCYCLE

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Application Number Priority Date Filing Date Title
JP19059499A JP4247857B2 (en) 1999-07-05 1999-07-05 Silence structure of the intake system in motorcycles

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Publication number Priority date Publication date Assignee Title
JP4630854B2 (en) * 2006-09-04 2011-02-09 本田技研工業株式会社 Intake device for motorcycle
JP6455742B2 (en) * 2017-03-17 2019-01-23 本田技研工業株式会社 Suction type vehicle intake structure
CN109958558B (en) * 2017-12-26 2021-06-15 光阳工业股份有限公司 Internal combustion engine intake system structure for vehicle

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