JPH07119435A - Muffler for small engine - Google Patents
Muffler for small engineInfo
- Publication number
- JPH07119435A JPH07119435A JP26483993A JP26483993A JPH07119435A JP H07119435 A JPH07119435 A JP H07119435A JP 26483993 A JP26483993 A JP 26483993A JP 26483993 A JP26483993 A JP 26483993A JP H07119435 A JPH07119435 A JP H07119435A
- Authority
- JP
- Japan
- Prior art keywords
- muffler
- small engine
- walls
- bodies
- window
- 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
Landscapes
- Exhaust Silencers (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は小形エンジンのマフラに
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a muffler for a small engine.
【0002】[0002]
【従来の技術】従来の一般的な小形エンジンのマフラ
は、鋼板成形品を接合し形成されている。吸着方法は、
マフラ内に仕切板を設け、内部抵抗を増すことにより音
のエネルギーを弱めるか、または吸音材を設けていた。
すなわち従来のマフラの吸音効果を高めようとすれば部
品点数が増えコストも高くなると共にかしめ及び溶接等
の方法により鋼板成形品の接合が行われていたため、分
解が困難でありマフラ内のカーボン等の堆積物の除去が
できなかった。2. Description of the Related Art A muffler of a conventional general small-sized engine is formed by joining steel plate molded products. The adsorption method is
A partition plate was provided in the muffler to weaken the sound energy by increasing the internal resistance, or a sound absorbing material was provided.
That is, if it is attempted to enhance the sound absorption effect of the conventional muffler, the number of parts will increase and the cost will increase, and since the steel sheet molded products have been joined by methods such as caulking and welding, it is difficult to disassemble and carbon etc. in the muffler. Could not be removed.
【0003】[0003]
【発明が解決しようとする課題】従来の小形エンジンの
マフラは、上記の如く吸音効果を高めようとすれば部品
点数が増しコスト高となると共に部品の接合方法がかし
め及び溶接等であるため、分解が困難でマフラ内部の掃
除ができないという問題があった。本発明の目的は、分
解可能でかつ部品点数を増すことなく効果的に吸音でき
る小形エンジンのマフラを提供することである。In the muffler of the conventional small engine, if the sound absorbing effect is to be enhanced as described above, the number of parts is increased and the cost is increased, and the joining method of the parts is caulking and welding. There was a problem that the inside of the muffler could not be cleaned because it was difficult to disassemble. An object of the present invention is to provide a muffler for a small engine that can be disassembled and can effectively absorb sound without increasing the number of parts.
【0004】[0004]
【課題を解決するための手段】上記目的は小形エンジン
のマフラを、シリンダからの排気音に膨張、共鳴、分散
といった吸音効果のある動きを起こさせる壁、リブ、
窓、多数の細かい凹凸を備えた2つのアルミダイカスト
成形品をねじ止めした構造とすることにより達成され
る。Means for Solving the Problems The above object is to provide a muffler for a small-sized engine with walls, ribs, which cause movements having sound absorbing effects such as expansion, resonance, and dispersion in exhaust sound from a cylinder,
This is achieved by using a structure in which a window and two aluminum die-cast moldings having many fine irregularities are screwed together.
【0005】[0005]
【作用】上記のように構成されたエンジンのマフラは、
排気ガスが入るとマフラ内で膨張し、減速及び減圧して
次の部屋に流れ込み、排気ガスが通過する際に、リブが
共鳴し、更にボデー内面に設けられた多数の細かい凹凸
に反射し分散する。またマフラがアルミダイカストでで
きているため、マフラ本体にも吸音効果がある。[Operation] The engine muffler configured as described above is
When exhaust gas enters, it expands in the muffler, decelerates and decompresses, flows into the next room, and when exhaust gas passes, the ribs resonate and are reflected by numerous fine irregularities provided on the inner surface of the body and dispersed. To do. Also, since the muffler is made of aluminum die casting, the muffler body also has a sound absorbing effect.
【0006】[0006]
【実施例】本発明の一実施例を図面を参照して説明す
る。マフラ3はアルミダイカスト等により成形された2
つのボデー1、2により構成される。該ボデー1はねじ
9にてシリンダ13へ、ボデー2はねじ10にてボデー
1に取り付けられている。ボデー1、2には中央付近に
窓を有する壁4、5を設け、また該壁4、5の中央付近
の窓両端には壁4、5に対し直角方向にリブ6、7を設
ける。ボデー1、2を合わせると、壁4、5の端面が合
致しマフラ3内部が分割されかつ壁4、5の中央付近の
窓が合致し中間通気口を形成する。またボデー1、2の
内面には多数の細かい凹凸8を設ける。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. The muffler 3 is molded by aluminum die casting, etc. 2
It is composed of two bodies 1 and 2. The body 1 is attached to the cylinder 13 with a screw 9, and the body 2 is attached to the body 1 with a screw 10. The bodies 1 and 2 are provided with walls 4 and 5 having windows near the center thereof, and ribs 6 and 7 are provided at both ends of the windows near the centers of the walls 4 and 5 at right angles to the walls 4 and 5. When the bodies 1 and 2 are put together, the end faces of the walls 4 and 5 are aligned and the inside of the muffler 3 is divided, and the windows near the centers of the walls 4 and 5 are aligned to form an intermediate vent. A large number of fine irregularities 8 are provided on the inner surfaces of the bodies 1 and 2.
【0007】上記のように構成したので、シリンダ13
の排気口14から出た排気ガスは、マフラ吸気口12よ
りマフラ3内部に流入するが、シリンダ排気口14ある
いはマフラ吸気口12に比べ、マフラ3内部の方が広い
ため、排気ガスは膨張し速さと圧力が減り、中間通気口
の面積に相当する分だけの排気ガスが次の部屋に流れ、
再び膨張し速さと圧力を減らす。該中間通気口を排気ガ
スが通過する際、リブ6及び7により共鳴効果が加わ
る。また膨張した排気ガスはボデー1、2の内面に設け
られた多数の細かい凹凸8に反射し分散する。更にマフ
ラ3がアルミダイカスト成形品であるため、素材そのも
のに吸音効果がある。これらにより吸音された排気ガス
が排気パイプ11より外へ放出される。Since it is constructed as described above, the cylinder 13
The exhaust gas from the exhaust port 14 flows into the muffler 3 through the muffler intake port 12, but the exhaust gas expands because the inside of the muffler 3 is wider than the cylinder exhaust port 14 or the muffler intake port 12. The speed and pressure are reduced, and exhaust gas equivalent to the area of the intermediate vent flows to the next room,
It expands again, reducing speed and pressure. When the exhaust gas passes through the intermediate vent, the ribs 6 and 7 add a resonance effect. Further, the expanded exhaust gas is reflected and dispersed by a large number of fine irregularities 8 provided on the inner surfaces of the bodies 1 and 2. Further, since the muffler 3 is an aluminum die cast product, the material itself has a sound absorbing effect. The exhaust gas absorbed by these is released from the exhaust pipe 11.
【0008】上記実施例の他に、マフラ3内を壁により
何個に分割しても良く、またボデー1、2の内面の多数
の細かい凹凸8についても他の形状例えば針状にしても
上記実施例と同様の効果が得られる。In addition to the above-mentioned embodiment, the inside of the muffler 3 may be divided into any number of pieces by walls, and the numerous fine irregularities 8 on the inner surfaces of the bodies 1 and 2 may be formed into other shapes such as needles. The same effect as the embodiment can be obtained.
【0009】[0009]
【発明の効果】本発明によれば、小形エンジンのマフラ
を2個のアルミダイカスト成形品より構成したので、分
割が容易で且つ部品数を増すことなく実現することが出
来る。吸音構造はマフラ内部を壁により分割し流入した
排気ガスを繰返し膨張させると共に壁により分割された
部屋と部屋を結ぶ中間通気口に設けたリブによる共鳴、
マフラ内部に設けた多数の細かい凹凸による分散を同時
に行うようにし、またアルミそのものが吸音性がマフラ
自体も良いため効果的に吸音することが出来る。According to the present invention, since the muffler of the small engine is composed of two aluminum die-cast products, it is easy to divide and can be realized without increasing the number of parts. The sound absorbing structure divides the inside of the muffler with a wall to repeatedly expand the inflowing exhaust gas and resonates with a rib provided in an intermediate vent connecting the room divided by the wall,
Dispersion is performed at the same time by a large number of fine irregularities provided inside the muffler, and since the aluminum itself has good sound absorption, the muffler itself is also effective in absorbing sound.
【図1】 本発明マフラを小形エンジンのシリンダに取
付けた状態を示す断面図。FIG. 1 is a sectional view showing a state in which a muffler of the present invention is attached to a cylinder of a small engine.
【図2】 マフラの内部構造を示す斜視図。FIG. 2 is a perspective view showing the internal structure of the muffler.
1、2はボデー、3はマフラ、4、5は壁、6、7はリ
ブ、8は細かい凹凸である。1 and 2 are bodies, 3 are mufflers, 4 and 5 are walls, 6 and 7 are ribs, and 8 is fine irregularities.
Claims (1)
て、2つのアルミダイカスト成形品からなるボデーの中
央付近に窓を有する壁を設け、該窓の両端には前記壁に
対し直角方向にリブを設け、前記2つのボデーをあわせ
ると、それぞれの壁の端面が合致し前記マフラ内部が複
数個に分割されると共に前記壁の中央付近の窓も合致し
て中間通気口を形成し、更に前記ボデーの内面に多数の
細かい凹凸を設けたことを特徴とする小形エンジンのマ
フラ。1. A muffler to be mounted on a small engine, wherein a wall having a window is provided in the vicinity of the center of a body made of two aluminum die cast moldings, and ribs are provided at both ends of the window in a direction perpendicular to the wall, When the two bodies are joined together, the end faces of the respective walls are matched to divide the inside of the muffler into a plurality of parts, and the windows near the center of the wall are also matched to form an intermediate vent hole, and the inner surface of the body is further A small engine muffler characterized by a large number of fine irregularities.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26483993A JP2850723B2 (en) | 1993-10-22 | 1993-10-22 | Small engine muffler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26483993A JP2850723B2 (en) | 1993-10-22 | 1993-10-22 | Small engine muffler |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07119435A true JPH07119435A (en) | 1995-05-09 |
JP2850723B2 JP2850723B2 (en) | 1999-01-27 |
Family
ID=17408933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP26483993A Expired - Lifetime JP2850723B2 (en) | 1993-10-22 | 1993-10-22 | Small engine muffler |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2850723B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114852030A (en) * | 2022-04-26 | 2022-08-05 | 安徽江淮汽车集团股份有限公司 | Silencer for automobile air braking dryer |
-
1993
- 1993-10-22 JP JP26483993A patent/JP2850723B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114852030A (en) * | 2022-04-26 | 2022-08-05 | 安徽江淮汽车集团股份有限公司 | Silencer for automobile air braking dryer |
Also Published As
Publication number | Publication date |
---|---|
JP2850723B2 (en) | 1999-01-27 |
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