JPS62198577A - Suction silencer for motorcycle - Google Patents
Suction silencer for motorcycleInfo
- Publication number
- JPS62198577A JPS62198577A JP3745886A JP3745886A JPS62198577A JP S62198577 A JPS62198577 A JP S62198577A JP 3745886 A JP3745886 A JP 3745886A JP 3745886 A JP3745886 A JP 3745886A JP S62198577 A JPS62198577 A JP S62198577A
- Authority
- JP
- Japan
- Prior art keywords
- intake
- motorcycle
- main frame
- hollow
- wall
- 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
Links
- 230000003584 silencer Effects 0.000 title claims description 13
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000001743 silencing effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Automatic Cycles, And Cycles In General (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は自動二輪車に設ける吸気消音器に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an intake silencer provided in a motorcycle.
自動二輪車の車体フレームとして、主フレームの断面を
中空矩形状にすると共に、長手方向の前端側を幅広にし
、後方に向かうほど幅狭になるように形成した、いわゆ
るデルタボックス形にし、この主フレームを左右一対設
けるようにしたものが注目されている。As a body frame for a motorcycle, the main frame has a hollow rectangular cross section, and is formed in a so-called delta box shape, which is wide at the front end in the longitudinal direction and becomes narrower toward the rear. A device with a pair of left and right is attracting attention.
一方、自動二輪車に設ける吸気消音器は容積が大きいほ
ど消音性能を上げることができることがわかっている。On the other hand, it is known that the larger the volume of an intake silencer installed in a motorcycle, the better the silencing performance can be.
しかし、自動二輪車では、自動四輪車等に比べると付属
ａ器頚の設置スペースが狭いため、上述のように吸気消
音器の容積を大きくするには車体を大きくしなければな
らなくなる問題があり、重量増加やコスト高の要因にな
る。However, compared to four-wheeled vehicles, motorcycles have a narrower installation space for the accessory neck, so there is the problem that the vehicle body must be made larger in order to increase the volume of the intake silencer, as mentioned above. , resulting in increased weight and cost.
本発明の目的は、上述したデルタボックス形の主フレー
ムを活用することにより、他の機器類の設置スペースを
狭めることなく高い消音効果を発揮することができる自
動二輪車の吸気消音器を提供することにある。An object of the present invention is to provide an intake silencer for a motorcycle that can exhibit a high noise reduction effect without narrowing the installation space for other equipment by utilizing the above-mentioned delta box type main frame. It is in.
上記目的を達成する本発明は、断面が中空矩形状で、か
つ長手方向の前端が幅広であり、後方に向かうほど幅狭
に形成された主フレームを左右一対設けた自動二輪車に
おいて、前記主フレームの外壁に中空部へ貫通する吸気
孔を設け、前記中空部を吸気通路としてエンジンの吸気
系へ連通させたことを特徴とするものである。To achieve the above object, the present invention provides a motorcycle equipped with a pair of left and right main frames each having a hollow rectangular cross-section, wide at the front end in the longitudinal direction, and narrowing toward the rear. The invention is characterized in that an intake hole is provided in the outer wall of the engine and penetrates into the hollow part, and the hollow part is connected to the intake system of the engine as an intake passage.
第３図に示す自動二輪車において、１は操向軸管、２は
主フレーム、３はバックステー、４は主フレーム２の前
端下部とバックステー３の下部の間を連結するダウンチ
ューブである。５はこれら部材によって構成された車体
フレームに搭載されたエンジンである。エンジン５の吸
気系には気化器７が取り付けられ、排気系には排気管８
が取り付けられている。In the motorcycle shown in FIG. 3, 1 is a steering shaft tube, 2 is a main frame, 3 is a backstay, and 4 is a down tube that connects the lower part of the front end of the main frame 2 and the lower part of the backstay 3. Reference numeral 5 denotes an engine mounted on a vehicle body frame made up of these members. A carburetor 7 is attached to the intake system of the engine 5, and an exhaust pipe 8 is attached to the exhaust system.
is installed.
第１図および第２図に示すように、主フレーム２，２は
左右一対設けられ、それぞれ前端が操向軸管１の後部に
溶接されて斜め外側へ延び、さらに湾曲して後方へ延び
ている。この主フレーム２は半割状の外板部２ａと内板
部２ｂとが溶接されることにより断面が中空矩形状とな
るように形成され、かつ長手方向の前端が操向軸管ｌの
長さにはパ等しい幅広で、後方に向かうほど幅狭になる
ように形成されており、いわゆるデルタボックス形にな
っている。また、左右の内板部２ｂ、２ｂの前端部は一
体に接続されて鞍形になり、その内部にデルタ状の空間
６ｄを形成している。As shown in FIGS. 1 and 2, a pair of left and right main frames 2, 2 are provided, each having a front end welded to the rear of the steering shaft tube 1 and extending obliquely outward, and further curved and extending rearward. There is. This main frame 2 is formed by welding a half-shaped outer plate part 2a and an inner plate part 2b to have a hollow rectangular cross section, and the front end in the longitudinal direction is the length of the steering shaft tube l. It is wide at the front and narrows toward the rear, creating a so-called delta box shape. Further, the front end portions of the left and right inner plate portions 2b, 2b are integrally connected to form a saddle shape, and a delta-shaped space 6d is formed therein.
内板部２を形成する外壁には、内側面の部分に多数の吸
気孔８．−・−・−２８が中空部６へ貫通するように設
けられ、さらにその前方側には別の複数の通気孔９．−
・・・−・−１９が外壁を貫通するように設けられてお
り、その通気孔９群の外側に濾過エレメント１０が保持
器１１に装着されて取り付けられている。この保持器１
１の出口側には給気管１２が設けられ、この給気管１２
は気化器７へ連通している。The outer wall forming the inner plate part 2 has a large number of air intake holes 8 on the inner surface. -28 is provided so as to penetrate into the hollow part 6, and furthermore, on the front side thereof, there are another plurality of ventilation holes 9. −
...-19 is provided so as to penetrate the outer wall, and the filter element 10 is attached to the retainer 11 on the outside of the group of ventilation holes 9. This retainer 1
An air supply pipe 12 is provided on the outlet side of the air supply pipe 12.
is in communication with the vaporizer 7.
また、中空部６内の前端に近い部分には、孔１４、・・
−・・−９１４を有するパンフル板１３が設けられてい
る。このバッフル板１３は吸気音全反射して減衰させる
機能を有すると共に、補強板としても機能している。Further, in a portion near the front end in the hollow portion 6, holes 14,...
A panfuru board 13 having -...-914 is provided. This baffle plate 13 has the function of totally reflecting and attenuating intake sound, and also functions as a reinforcing plate.
上述した自動二輪車においてエンジン４を運転すると、
外気が主フレーム２の吸気孔８．・・−・−・、８から
中空部６へ吸入され、さらにその中空部６を吸気通路と
して通気孔９．−・−・・、９を通過し、濾過エレメン
ト１ｏにおいて除塵されたのち気化器７へ至り、そこで
燃料との混合気ニナっテエンシン４へ供給される。この
ように外気が吸気孔８から中空部６に吸入されるとき吸
気音が発生するが、その吸気音は主フレーム２内の内壁
をはねかえりながら減衰されていくため消音される。When the engine 4 is operated in the above-mentioned motorcycle,
Intake hole 8 of main frame 2 for outside air. . -..., 9, and after being removed by the filter element 1o, it reaches the carburetor 7, where it is supplied to the engine 4 as a mixture with fuel. In this way, when the outside air is sucked into the hollow part 6 from the intake hole 8, intake noise is generated, but the intake noise is attenuated while bouncing off the inner wall within the main frame 2, so that it is muffled.
すなわち、上記広い容積の中空部６は吸気消音器を構成
している。そのため従来のように車体フレームに囲まれ
た領域内に吸気消音器を設置するためのスペースは必要
でなくなり、他の付属機器用のスペースを狭めることは
ない。しかも、主フレーム２の中空部６は長手方向に長
く大きな容積を有すると共に、前端側の横断面積が大き
く、後方に向かうほど小さく漸減する形状になっている
ため、極めて広範囲にわたる周波数の減衰に効果を発揮
することができ、高性能の消音効果を発揮することがで
きる。In other words, the large-volume hollow portion 6 constitutes an intake silencer. Therefore, there is no longer a need for space to install an intake silencer within the area surrounded by the vehicle body frame as in the past, and the space for other accessory equipment is not reduced. Moreover, the hollow part 6 of the main frame 2 is long in the longitudinal direction and has a large volume, and has a large cross-sectional area on the front end side and gradually decreases toward the rear, so it is effective at attenuating frequencies over an extremely wide range. It is possible to exhibit high-performance sound silencing effects.
また、上記実施例のようにバッフル板１３を設ければ、
消音効果を一層高めることができる。Moreover, if the baffle plate 13 is provided as in the above embodiment,
The silencing effect can be further enhanced.
本発明において、バッフル板１３は必ずしも必要ではな
いが、設けるときは実施例のように１枚に限らず、複数
枚を要所に設けるようにしてもよい。また、設ける位置
は、操向軸管１を通る車体中心に対し対称であっても、
非対称であってもよい。また、パンフル板１３に設ける
孔１４の数も任意であり、その孔１４を複数設ける場合
には相互の孔の大きさは異なっていてもよい。In the present invention, the baffle plate 13 is not necessarily required, but when provided, it is not limited to one as in the embodiment, but a plurality of baffle plates may be provided at key locations. Furthermore, even if the position is symmetrical to the center of the vehicle body passing through the steering shaft tube 1,
It may be asymmetrical. Further, the number of holes 14 provided in the pamphlet plate 13 is also arbitrary, and when a plurality of holes 14 are provided, the sizes of the holes may be different from each other.
また、上記実施例における吸気孔８は主フレ−ム２の外
壁の内側面に設けられているため、外から視認しにくい
状態になり、それによって外観を良好にすることができ
る。また、水や塵埃の吸い込みを少なくし、かつ分離に
も有利にすることができる。このような観点からは、吸
気孔８を主フレーム２の下側面に設けるようにしてもよ
い。Further, since the intake holes 8 in the above embodiment are provided on the inner surface of the outer wall of the main frame 2, they are difficult to see from the outside, thereby improving the appearance. In addition, it is possible to reduce suction of water and dust, and it is also advantageous for separation. From this point of view, the intake hole 8 may be provided on the lower surface of the main frame 2.
上述したように本発明は、断面が中空矩形状で、かつ長
手方向の前端が幅広であり、後方に向かうほど幅狭に形
成された主フレームを左右一対設けた自動二輪車におい
て、前記主フレームの外壁に中空部へ貫通する吸気孔を
設け、前記中空部を吸気通路としてエンジンの吸気系へ
連通させた構成であるので、上記主フレーム内の中空部
が吸気消音器として利用される。したがって、吸気消音
器の設置用に特別のスペースは不要となり、他の付属機
器の設置スペースを狭めることはない。しかも、上記中
空部は長手方向に長く広容積であり、かつその横断面積
が前端から漸減していく構造になっているため、広範囲
にわたる周波数の減衰に効果を発揮することができ、高
い消音効果を得ることができる。As described above, the present invention provides a motorcycle equipped with a pair of left and right main frames each having a hollow rectangular cross section, wide at the front end in the longitudinal direction, and narrowing toward the rear. Since the outer wall is provided with an intake hole that penetrates into the hollow part, and the hollow part is used as an intake passage to communicate with the intake system of the engine, the hollow part in the main frame is used as an intake silencer. Therefore, no special space is required for installing the intake silencer, and the installation space for other accessory equipment is not reduced. Furthermore, the hollow section is long in the longitudinal direction and has a large volume, and its cross-sectional area gradually decreases from the front end, so it is effective at attenuating frequencies over a wide range, and has a high sound deadening effect. can be obtained.
第１図は本発明の吸気消音器を構成した主フレームを、
第２図の１−１矢視で示す断面図、第２図は同主フレー
ムを第１図の■−■矢視で示す断面図、第３図は同主フ
レームを設けた自動二輪車の側面図である。
２−主フレーム、 ５−エンジン、 ６−・・中空
部、 ７−気化器、 ８−吸気孔、 ９−通気孔、
１０−・−濾過フィルタ。Figure 1 shows the main frame that constitutes the intake silencer of the present invention.
2 is a cross-sectional view taken along arrows 1-1 in Figure 2, Figure 2 is a cross-sectional view of the main frame taken along arrows ■-■ in Figure 1, and Figure 3 is a side view of a motorcycle equipped with the main frame. It is a diagram. 2-Main frame, 5-Engine, 6-Hollow part, 7-Carburetor, 8-Intake hole, 9-Vent hole,
10--filtration filter.
Claims (3)
であり、後方に向かうほど幅狭に形成された主フレーム
を左右一対設けた自動二輪車において、前記主フレーム
の外壁に中空部へ貫通する吸気孔を設け、前記中空部を
吸気通路としてエンジンの吸気系へ連通させたことを特
徴とする自動二輪車の吸気消音器。(1) In a motorcycle equipped with a pair of left and right main frames each having a hollow rectangular cross-section, wide at the front end in the longitudinal direction, and narrowing toward the rear, a hollow section is formed on the outer wall of the main frame. An intake silencer for a motorcycle, characterized in that an intake hole is provided therethrough, and the hollow portion is used as an intake passageway to communicate with an intake system of an engine.
いる特許請求の範囲第１項記載の自動二輪車の吸気消音
器。(2) The intake silencer for a motorcycle according to claim 1, wherein the intake hole is provided on the inner surface of the outer wall of the main frame.
いる特許請求の範囲第１項記載の自動二輪車の吸気消音
器。(3) The intake silencer for a motorcycle according to claim 1, wherein the intake hole is provided on the lower side of the outer wall of the main frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61037458A JPH0774018B2 (en) | 1986-02-24 | 1986-02-24 | Intake silencer for motorcycles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61037458A JPH0774018B2 (en) | 1986-02-24 | 1986-02-24 | Intake silencer for motorcycles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62198577A true JPS62198577A (en) | 1987-09-02 |
| JPH0774018B2 JPH0774018B2 (en) | 1995-08-09 |
Family
ID=12498079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61037458A Expired - Fee Related JPH0774018B2 (en) | 1986-02-24 | 1986-02-24 | Intake silencer for motorcycles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0774018B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0527269U (en) * | 1991-09-20 | 1993-04-09 | 新ダイワ工業株式会社 | Intake device for small engines such as chain saws and intake dust remover for small engines |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS586957U (en) * | 1981-07-06 | 1983-01-17 | 本田技研工業株式会社 | Internal combustion engine intake noise muffling device |
| JPS60138835U (en) * | 1984-02-27 | 1985-09-13 | スズキ株式会社 | Motorcycle air cleaner intake |
-
1986
- 1986-02-24 JP JP61037458A patent/JPH0774018B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS586957U (en) * | 1981-07-06 | 1983-01-17 | 本田技研工業株式会社 | Internal combustion engine intake noise muffling device |
| JPS60138835U (en) * | 1984-02-27 | 1985-09-13 | スズキ株式会社 | Motorcycle air cleaner intake |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0527269U (en) * | 1991-09-20 | 1993-04-09 | 新ダイワ工業株式会社 | Intake device for small engines such as chain saws and intake dust remover for small engines |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0774018B2 (en) | 1995-08-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |