JPS6321734Y2 - - Google Patents
Info
- Publication number
- JPS6321734Y2 JPS6321734Y2 JP12756383U JP12756383U JPS6321734Y2 JP S6321734 Y2 JPS6321734 Y2 JP S6321734Y2 JP 12756383 U JP12756383 U JP 12756383U JP 12756383 U JP12756383 U JP 12756383U JP S6321734 Y2 JPS6321734 Y2 JP S6321734Y2
- Authority
- JP
- Japan
- Prior art keywords
- intake
- annular chamber
- intake passage
- carburetor
- engine
- 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.)
- Expired
Links
- 239000011358 absorbing material Substances 0.000 claims description 6
- 239000006200 vaporizer Substances 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Description
【考案の詳細な説明】
この考案は、ピストン往復型のエンジンの吸気
音低減装置に関する。[Detailed Description of the Invention] This invention relates to an intake noise reduction device for a reciprocating piston type engine.
ピストン往復型のエンジンでは、吸気が間欠的
に急激に行われる。それで、急激に吸気が行われ
るとき吸気管内に吸気音が発生し、この吸気音が
外部に洩れ、騒音となつて不快である。エンジン
の吸気は、吸気孔と気化器の吸気通路を通して行
われ、気化器にはエアークリーナーが連結され
る。エアークリーナー部分では、クリーナーのボ
リユームで吸気騒音を減衰できるが、エンジンの
吸気孔と気化器の吸気通路では、減衰する部分が
なく、騒音が放射されて具合が悪い。 In a reciprocating piston type engine, intake is performed rapidly intermittently. Therefore, when air is rapidly taken in, intake noise is generated within the intake pipe, and this intake noise leaks to the outside and becomes unpleasant noise. Intake of air into the engine is performed through an intake hole and an intake passage of a carburetor, and an air cleaner is connected to the carburetor. In the air cleaner section, intake noise can be damped by the volume of the cleaner, but in the engine intake hole and the intake passage of the carburetor, there is no damping section, and the noise is radiated, causing problems.
この考案は、かかる点に鑑み、気化器を利用し
て、気化器の吸気通路の出口部分に吸気音を低減
できる装置を設けて、吸気騒音を小さくするよう
に改善したもので、以下本考案を図面に示す実施
例について説明する。 In view of this, this invention is an improvement to reduce the intake noise by using a carburetor and installing a device that can reduce intake noise at the outlet of the intake passage of the carburetor. An embodiment shown in the drawings will be described.
エンジン１の吸気孔２の端には、連結筒３を連
結し、連結筒３には、気化器４の吸気通路５の出
口を連結する。又、吸気通路５の入口には、エア
ークリーナー６を連結する。気化器４には吸気通
路５の出口部内周面に孔径を大きくした大径部を
形成し、当該部に環状室７を設ける。すなわち、
連結筒３の一端には、吸気通路５の内径に合せた
筒状の突出部８を設け、連結筒３と気化器４を連
結したとき、吸気通路５の周りに環状室７ができ
るようにする。環状室７にはグラスウール等の多
孔質の吸音材９をつめ、突出部８には、多数の小
孔１０を設けて、環状室７と吸気通路５を連通さ
せる。 A connecting cylinder 3 is connected to the end of the intake hole 2 of the engine 1, and an outlet of an intake passage 5 of a carburetor 4 is connected to the connecting cylinder 3. Further, an air cleaner 6 is connected to the entrance of the intake passage 5. The carburetor 4 has a large-diameter portion with a large hole diameter formed on the inner circumferential surface of the outlet portion of the intake passage 5, and an annular chamber 7 is provided in this portion. That is,
A cylindrical protrusion 8 matching the inner diameter of the intake passage 5 is provided at one end of the connecting cylinder 3 so that an annular chamber 7 is formed around the intake passage 5 when the connecting cylinder 3 and the carburetor 4 are connected. do. The annular chamber 7 is filled with a porous sound absorbing material 9 such as glass wool, and the protrusion 8 is provided with a large number of small holes 10 to communicate the annular chamber 7 and the intake passage 5.
しかして、吸気は、吸気孔２と気化器４の吸気
通路５を、間欠的に急激に流れて、吸気音を発生
させる。しかし、この吸気音は、環状室７が干渉
室になり、又、環状室７内の吸音材９で吸収され
て、減衰されて低減される。環状室７は、気化器
４のボデーに一体成形してあつて、安価で場所を
とらずにできる。 Thus, the intake air rapidly flows intermittently through the intake hole 2 and the intake passage 5 of the carburetor 4, generating intake noise. However, this intake sound is attenuated and reduced by the annular chamber 7 acting as an interference chamber and being absorbed by the sound absorbing material 9 within the annular chamber 7. The annular chamber 7 is integrally molded into the body of the vaporizer 4, and can be done inexpensively and without taking up much space.
以上説明したように、この考案は、気化器の吸
気通路出口端部内周面に孔径を大きくした大径部
を形成するとともに、上記吸気通路と同一内径を
有する筒状の突出部を突設した連結筒を介して、
エンジンの吸気孔端と気化器の吸気通路の出口端
とを連結し、上記大径部と上記筒状の突出部との
間に環状室を形成し、その環状室内に吸音材を挿
入すると共に連結筒の突出部に多数の小孔を穿設
して環状室と連通させたので、環状室が吸気音の
干渉室になり、吸音材で効果的に吸音できて、吸
気音を低減することができる。又、環状室は気化
器のボデーに一体的に成形できて、安価にでき、
場所もとらないようにできる。 As explained above, this invention forms a large diameter part with a large hole diameter on the inner peripheral surface of the outlet end of the intake passage of the carburetor, and also provides a protruding cylindrical protrusion having the same inner diameter as the intake passage. Through the connecting tube,
The intake hole end of the engine and the outlet end of the intake passage of the carburetor are connected, an annular chamber is formed between the large diameter section and the cylindrical protrusion, and a sound absorbing material is inserted into the annular chamber. Since a large number of small holes are bored in the protruding part of the connecting tube to communicate with the annular chamber, the annular chamber becomes an interference chamber for intake noise, and the sound can be effectively absorbed by the sound-absorbing material, reducing intake noise. I can do it. In addition, the annular chamber can be integrally molded into the body of the vaporizer, making it inexpensive.
It can be done without taking up much space.
図は本考案の一実施例を示す要部縦断側面図で
ある。
１……エンジン、２……吸気孔、３……連結
筒、４……気化器、５……吸気通路、７……環状
室、８……突出部、９……吸音材、１０……小
孔。
The figure is a longitudinal sectional side view of a main part showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Engine, 2... Intake hole, 3... Connection tube, 4... Carburizer, 5... Intake passage, 7... Annular chamber, 8... Projection, 9... Sound absorbing material, 10... Small hole.
Claims (1)
くした大径部を形成するとともに、上記吸気通路
と同一内径を有する筒状の突出部を突設した連結
筒を介して、エンジンの吸気孔端と気化器の吸気
通路の出口端とを連結し、上記大径部と上記筒状
の突出部との間に環状室を形成し、その環状室内
に吸音材を挿入するとともに連結筒の突出部に多
数の小孔を穿設して環状室と連通させたことを特
徴とするエンジンの吸気音低減装置。 A large-diameter portion with a large hole diameter is formed on the inner circumferential surface of the outlet end of the intake passage of the carburetor, and the intake hole of the engine is connected to the intake hole of the engine through a connecting cylinder in which a cylindrical protrusion having the same inner diameter as the intake passage is provided. The end and the outlet end of the intake passage of the carburetor are connected, an annular chamber is formed between the large diameter part and the cylindrical protrusion, a sound absorbing material is inserted into the annular chamber, and the connecting cylinder protrudes. An engine intake noise reduction device characterized in that a large number of small holes are formed in a portion to communicate with an annular chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12756383U JPS6036569U (en) | 1983-08-18 | 1983-08-18 | Engine intake noise reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12756383U JPS6036569U (en) | 1983-08-18 | 1983-08-18 | Engine intake noise reduction device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6036569U JPS6036569U (en) | 1985-03-13 |
| JPS6321734Y2 true JPS6321734Y2 (en) | 1988-06-15 |
Family
ID=30289679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12756383U Granted JPS6036569U (en) | 1983-08-18 | 1983-08-18 | Engine intake noise reduction device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6036569U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6318180A (en) * | 1986-07-09 | 1988-01-26 | Aisin Seiki Co Ltd | Muffler for internal combustion engine |
-
1983
- 1983-08-18 JP JP12756383U patent/JPS6036569U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6036569U (en) | 1985-03-13 |
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