JPH0612165Y2 - Stamped muffler - Google Patents
Stamped mufflerInfo
- Publication number
- JPH0612165Y2 JPH0612165Y2 JP1989011594U JP1159489U JPH0612165Y2 JP H0612165 Y2 JPH0612165 Y2 JP H0612165Y2 JP 1989011594 U JP1989011594 U JP 1989011594U JP 1159489 U JP1159489 U JP 1159489U JP H0612165 Y2 JPH0612165 Y2 JP H0612165Y2
- Authority
- JP
- Japan
- Prior art keywords
- chamber
- muffler
- muffling
- exhaust gas
- silencing
- 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 - Lifetime
Links
Landscapes
- Exhaust Silencers (AREA)
Description
本考案はプレス加工法によって製造され、スタンプドマ
フラと称される車輌用の主消音器に関するものである。The present invention relates to a main silencer for a vehicle, which is manufactured by a press working method and is called a stamped muffler.
【従来の技術】 プレス加工法によって製造されるスタンプドマフラと呼
ばれる車輌用主消音器は、一般的にプレス加工された４
枚の鋼板、すなわち外部上ケース(1)、外部下ケース
(2)、内部上プレート(3)及び内部下プレート(4)によっ
て構成され、それぞれの板は溶接、ヘミング等の工法に
より結合される。 第５図は主消音器の水平中央すなわち内部上プレート
(3)と内部下プレート(4)との接合面で切断し下方を眺め
た平面図、第６図は主消音器の第５図に示すＤ−Ｄ断
面、第７図は同じくＥ−Ｅ断面を示す。 主消音器には、エンジンからの排気を導く入口側排気管
(17)及び主消音器から排気を外へ導く出口側排気管(18)
が接合される。入口側排気管(17)から主消音器内に導入
された排気は、内部上プレート(3)と内部下プレート(4)
とで作られた高周波音消音室(6)の外壁の中央部に組み
合わされた多数の小径穴を明けた直線の高周波音消音パ
イプ(5)を流れ、流通穴(7)を経て消音室Ａ(8)に流入す
る。消音室Ａ(8)内で膨張した排気は、内部上プレート
(3)と内部下プレート(4)とで形成され、かつ多数の中径
穴をあけた消音接続管(9)を経て消音室Ｂ(10)に流入す
る。消音室Ｂ(10)内で膨張した排気は内部上プレート
(3)と内部下プレート(4)とで形成され、かつ中径穴をあ
けた消音接続管(11)を経て消音室Ｃ(12)に流入する。消
音室Ｃ(12)内で膨張した排気は内部下プレート(4)と一
体形成された円錐形凸部の下端にあけられた穴(14)を通
って出口側排気管(18)に導かれる。流通穴(7)及び流通
穴(13)は、それぞれ消音室Ａ(8)、消音室Ｃ(12)の内部
上プレート(3)と内部下プレート(4)とで上下に仕切られ
た室を連通させる。 主消音器の温度が低い場合発生するエンジン排気中の水
分の凝結水は消音室Ａ(8)内に発生したものは凝結水通
路(15)、消音室Ｂ(10)内に発生したものは凝結水排出穴
(16)を通って消音室Ｃ(12)内に集められ、排気と一緒に
穴(14)から吸上げられ、主消音器の外部へ排出される。2. Description of the Related Art A vehicle main muffler called a stamped muffler manufactured by a press working method is generally press-processed.
Sheet steel, ie outer upper case (1), outer lower case
It is composed of (2), the inner upper plate (3) and the inner lower plate (4), and the respective plates are joined by a method such as welding or hemming. Fig. 5 shows the horizontal center of the main muffler, that is, the inner upper plate
FIG. 6 is a plan view of the main silencer cut along the joint surface between (3) and the lower inner plate (4) as seen from below. A cross section is shown. The main silencer has an exhaust pipe on the inlet side that guides the exhaust from the engine.
(17) and outlet side exhaust pipe (18) that guides the exhaust from the main silencer to the outside
Are joined. The exhaust gas introduced from the inlet side exhaust pipe (17) into the main silencer is the inner upper plate (3) and the inner lower plate (4).
A high-frequency sound deadening chamber (6) made of and flows through a straight high-frequency sound deadening pipe (5) with a large number of small holes that are combined with the central part of the outer wall, and passes through the flow hole (7) to put it into the sound deadening room A. It flows into (8). The exhaust gas that has expanded in the muffling chamber A (8) is the inner upper plate.
(3) and the inner lower plate (4), and flows into the sound deadening chamber B (10) through the sound deadening connecting pipe (9) having a large number of medium diameter holes. Exhaust gas expanded in the muffler chamber B (10) has an internal upper plate
(3) and the inner lower plate (4), and flows into the sound deadening chamber C (12) through the sound deadening connecting pipe (11) having a hole of medium diameter. The exhaust gas expanded in the muffling chamber C (12) is guided to the outlet side exhaust pipe (18) through a hole (14) formed in the lower end of the conical convex portion integrally formed with the inner lower plate (4). . The circulation hole (7) and the circulation hole (13) are chambers divided into upper and lower parts by the inner upper plate (3) and the inner lower plate (4) of the silencing chamber A (8) and the silencing chamber C (12), respectively. Communicate. Condensation of water in the engine exhaust that occurs when the temperature of the main silencer is low is generated in the silencer chamber A (8) in the condensed water passage (15), and in the silencer chamber B (10). Condensed water discharge hole
It is collected in the muffler chamber C (12) through (16), sucked up from the hole (14) together with the exhaust gas, and discharged to the outside of the main muffler.
このような従来のスタンプドマフラにおいては、内部上
プレート(3)と内部下プレート(4)との形状から分割形成
される消音室Ａ(8)、消音室Ｂ(10)および消音室Ｃ(12)
は、総て排気膨張形の消音室として作用させる。しか
し、膨張型の消音室では人の耳につき易い低周波騒音の
減衰には効果が十分でない。この点は解決すべき課題と
なっていたのである。In such a conventional stamped muffler, the silencing chamber A (8), the silencing chamber B (10) and the silencing chamber C (which are formed separately from the shape of the inner upper plate (3) and the inner lower plate (4) are formed. 12)
All act as an exhaust expansion type silencer. However, the expansion type muffling room is not sufficiently effective in attenuating low-frequency noise that tends to be heard by the human ear. This point was a problem to be solved.
本考案では、上記のような従来のスタンプドマフラの内
部構造に改良を加えて、２枚の外部上下ケース(1)(2)と
２枚の内部上下プレート(3)(4)のプレス成形によって形
成されたスタンプドマフラにおいて、内部上下プレート
(3)(4)で形成される室(30)により区画された複数の拡張
消音室を外部上下ケース(1)(2)内に形成するとともに、
各拡張消音室(8)(12)へ通じる排気ガス通路(31)を前記
室(30)を貫通する穴あきパイプで形成して、前記室(30)
を低周波干渉消音室Ｂとして従来の難点を解決したので
ある。In the present invention, the internal structure of the conventional stamped muffler as described above is improved to press-mold two outer upper and lower cases (1) (2) and two inner upper and lower plates (3) (4). In stamped muffler formed by
(3) A plurality of expanded muffling chambers partitioned by the chamber (30) formed in (4) are formed in the outer upper and lower cases (1) and (2),
An exhaust gas passageway (31) leading to each expanded muffling chamber (8) (12) is formed by a perforated pipe passing through the chamber (30), and the chamber (30)
The low frequency interference muffling room B has solved the conventional difficulty.
従来のスタンプドマフラにおいては、消音室は総て拡張
室となるが、本考案のスタンプドマフラにおいては、複
数の排気ガス通路(31)と室(30)とが穴あきパイプの穴に
よって連通状態となり、内部上プレート(3)と内部下プ
レート(4)で形成される室(30)と各排気ガス通路(31)と
の間に干渉作用が生じて、前記室(30)が低周波干渉消音
室Ｂとなり、各排気ガス通路(31)を通過する排気ガス音
のうちの主として低周波騒音が減音される。この減音作
用は、室(30)を排気ガス通路(31)の穴あきパイプが複数
回跨ぐことにより増幅される。In the conventional stamped muffler, the muffling chambers are all expansion chambers, but in the stamped muffler of the present invention, the plurality of exhaust gas passages (31) and the chambers (30) are connected by the holes of the perforated pipe. The exhaust gas passages (31) and the chamber (30) formed by the inner upper plate (3) and the inner lower plate (4) are interfered with each other, and the chamber (30) has a low frequency. It becomes the interference silencing chamber B, and mainly low-frequency noise of the exhaust gas noise passing through each exhaust gas passage (31) is reduced. This noise reduction effect is amplified by the chamber (30) being spanned by the perforated pipe of the exhaust gas passage (31) a plurality of times.
【実施例】 以下図面によって本考案の実施例を詳細に説明する。 第１図は本考案のスタンプドマフラの水平中央、すなわ
ち内部上プレート(3)と内部下プレート(4)との接合面で
切断し、下方を眺めた平面図、第２図は第１図中Ａ−Ａ
断面図、第３図は同Ｂ−Ｂ断面図、第４図は同Ｃ−Ｃ断
面図である。 本実施例のスタンプドマフラにおいて、２枚の外部上下
ケース(1)(2)と２枚の内部上下プレート(3)(4)は従来と
同様にプレス成形によって形成されている。しかし、内
部構造は従来と異なり、内部上プレート(3)と内部下プ
レート(4)とによってその間に形成された室に複数の
（この場合３本）排気ガス通路(31a)〜(31c)が貫通して
いる。この室(30)が低周波音の干渉消音室Ｂである。こ
の低周波干渉消音室Ｂの両側には拡張室の消音室Ａ
(8)、と同Ｃ(12)が外部上下ケース(1)(2)内に形成され
ている。拡張消音室Ａ(8)と拡張消音室Ｃ(12)はこれま
でのように消音に寄与する。 高周波音消音室(6)と拡張消音室Ｃ(12)間の排気ガス通
路(31a)は第２図に示したように、高周波音消音室(6)の
中央部に組合わされた、多数の小径穴をあけた直状の高
周波音消音パイプ(5)を延長して消音室Ｂ(30)を貫通さ
せ、拡張消音室Ｃ(12)に開放される内部上プレート(3)
と内部下プレート(4)とで形成される排気ガス通路に接
続している。高周波音消音パイプ(5)の延長部分が穴あ
きパイプであって、消音室(30)の内側になる個所に消音
穴(21)を設け、消音室Ｂ(30)を低周波干渉形消音室とし
て低周波騒音レベルの低減に利用する。 消音室Ｃ(12)と拡張消音室Ａ(8)間の排気ガス通路(31b)
においても、第３図にみられるように、多数の中径穴を
あけた消音接続管(9)の延長部分に直状で、かつ消音穴
(22)をあけた接続管(19)を接合し、消音室Ｂ(30)を低周
波干渉形消音室として利用する。 更に、第４図にみられるように、マフラ中の後部排気ガ
ス通路である穴(14)と出口側排気管(18)を継ぐ内部上プ
レート(3)と内部下プレート(4)とで形成される排気ガス
通路(31c)の消音室Ｂ(30)貫通部分に直状パイプの接続
管(20)を挿入接合し、排気は消音室Ｂ(30)とは関係なく
流通させるようにしている。Embodiments Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a plan view of the stamped muffler of the present invention cut horizontally at the horizontal center, that is, at the joint surface between the inner upper plate (3) and the inner lower plate (4), and looking down, FIG. 2 is FIG. Medium A-A
Sectional drawing, FIG. 3 is the same BB sectional view, and FIG. 4 is the same CC sectional view. In the stamped muffler of this embodiment, the two outer upper and lower cases (1) and (2) and the two inner upper and lower plates (3) and (4) are formed by press molding as in the conventional case. However, the internal structure is different from the conventional one, and a plurality of (three in this case) exhaust gas passages (31a) to (31c) are provided in the chamber formed between the internal upper plate (3) and the internal lower plate (4). Penetrates. This chamber (30) is an interference silencing chamber B for low frequency sounds. On both sides of this low frequency interference silencing room B, the silencing room A of the expansion room
The same C (12) as (8) and (8) is formed in the outer upper and lower cases (1) and (2). The extended silencing chamber A (8) and the extended silencing chamber C (12) contribute to silencing as before. The exhaust gas passageway (31a) between the high frequency sound muffling room (6) and the extended sound deadening room C (12) is connected to the center of the high frequency sound muffling room (6) as shown in FIG. An internal upper plate (3) which is opened to the extended silencing chamber C (12) by extending the straight high-frequency sound silencing pipe (5) with a small diameter hole to penetrate the silencing chamber B (30)
Is connected to the exhaust gas passage formed by the inner lower plate (4). The extension part of the high-frequency sound muffling pipe (5) is a perforated pipe, and a muffling hole (21) is provided at a location inside the muffling chamber (30), and the muffling chamber B (30) is a low-frequency interference type muffling chamber. Is used to reduce the low frequency noise level. Exhaust gas passage (31b) between the sound deadening chamber C (12) and the extended sound deadening chamber A (8)
As shown in Fig. 3, the straightening of the sound deadening connection pipe (9) with a large number of medium diameter holes and the sound deadening hole
The connection pipe (19) with the opening (22) is joined, and the muffler chamber B (30) is used as a low frequency interference type muffler chamber. Further, as shown in FIG. 4, it is formed by the inner upper plate (3) and the inner lower plate (4) connecting the hole (14) which is the rear exhaust gas passage in the muffler and the outlet side exhaust pipe (18). A connecting pipe (20) of a straight pipe is inserted and joined to a portion of the exhaust gas passageway (31c) that penetrates the muffler chamber B (30) so that the exhaust gas circulates regardless of the muffler chamber B (30). .
従来のスタンプドマフラでは、拡張消音室Ａ(8)、消音
室Ｂ(10)および消音室Ｃ(12)は総て膨張形の消音効果を
期待するものであるが、車輌搭載上の寸法制限から限ら
れた消音室容積では低周波騒音成分の減衰性能に劣る場
合が多い欠点を有していたが、本考案のスタンプドマフ
ラでは、安価な穴あきパイプを追加することのみによっ
て、消音室の１つを低周波の干渉形消音室に利用し、限
られた消音室容積を活用して、全体を総合して排気騒音
を効果的に低減させることが可能になった。In the conventional stamped muffler, the expanded silencing chamber A (8), silencing chamber B (10), and silencing chamber C (12) are all expected to have an expansion-type silencing effect, but the size restrictions on vehicle mounting are limited. Due to the limited volume of the muffling chamber, it often had the drawback of being inferior in the attenuation performance of low-frequency noise components.However, the stamped muffler of the present invention has only the addition of an inexpensive perforated pipe. One of them was used for a low-frequency interference type silencing chamber, and the limited volume of the silencing chamber was utilized, making it possible to effectively reduce exhaust noise as a whole.
第１図は本考案のスタンプドマフラーの水平中央、すな
わち内部上プレート(3)と内部下プレート(4)との接合面
で切断し、下方を眺めた平面図、第２図は第１図中Ａ−
Ａ断面図、第３図は同Ｂ−Ｂ断面図、第４図は同Ｃ−Ｃ
断面図である。第５図は従来品の第１図相当平面図、第
６図は第５図中Ｄ−Ｄ断面図、第７図は同Ｅ−Ｅ断面図
である。 (1)外部上ケース、(2)外部下ケース (3)内部上プレート、(4)内部下プレート (5)高周波音消音パイプ、(6)高周波音消音室 (8)拡張消音室Ａ、(12)拡張消音室Ｃ (21)(22)消音穴 (30)低周波干渉消音室Ｂ、(31)排気ガス通路FIG. 1 is a plan view of the stamped muffler of the present invention cut horizontally at the horizontal center, that is, at a joint surface between an inner upper plate (3) and an inner lower plate (4), and a lower view, and FIG. 2 is FIG. Medium A-
A sectional view, FIG. 3 is the same BB sectional view, and FIG. 4 is the same CC.
FIG. FIG. 5 is a plan view of a conventional product corresponding to FIG. 1, FIG. 6 is a sectional view taken along the line DD in FIG. 5, and FIG. 7 is a sectional view taken along the line EE. (1) Outer upper case, (2) Outer lower case (3) Inner upper plate, (4) Inner lower plate (5) High frequency sound deadening pipe, (6) High frequency sound deadening chamber (8) Extended deadening chamber A, ( 12) Extended muffling chamber C (21) (22) Muffling hole (30) Low frequency interference muffling chamber B, (31) Exhaust gas passage
Claims (1)
上下プレート(3)(4)のプレス成形によって形成されたス
タンプドマフラにおいて、内部上下プレート(3)(4)で形
成される室(30)により区画された複数の拡張消音室を外
部上下ケース(1)(2)内に形成するとともに、各拡張消音
室(8)(12)へ通じる排気ガス通路(31)を前記室(30)を貫
通する穴あきパイプで形成して、前記室(30)を低周波干
渉消音室Ｂとしてなることを特徴とするスタンプドマフ
ラ。1. A stamped muffler formed by press-molding two outer upper and lower cases (1) (2) and two inner upper and lower plates (3) (4), wherein the inner upper and lower plates (3) (4) A plurality of expanded muffling chambers defined by the chamber (30) are formed in the outer upper and lower cases (1) and (2), and an exhaust gas passage (8) (12) leading to each expanded muffling chamber (8) (12) is formed. 31) A stamped muffler, characterized in that 31) is formed by a perforated pipe penetrating the chamber (30), and the chamber (30) serves as a low frequency interference silencing chamber B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989011594U JPH0612165Y2 (en) | 1989-02-01 | 1989-02-01 | Stamped muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989011594U JPH0612165Y2 (en) | 1989-02-01 | 1989-02-01 | Stamped muffler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02103114U JPH02103114U (en) | 1990-08-16 |
| JPH0612165Y2 true JPH0612165Y2 (en) | 1994-03-30 |
Family
ID=31220286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989011594U Expired - Lifetime JPH0612165Y2 (en) | 1989-02-01 | 1989-02-01 | Stamped muffler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0612165Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2762296B2 (en) * | 1989-04-05 | 1998-06-04 | ジーイー横河メディカルシステム株式会社 | Touch panel display |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4759423A (en) * | 1987-06-11 | 1988-07-26 | Ap Industries, Inc. | Tube and chamber construction for an exhaust muffler |
-
1989
- 1989-02-01 JP JP1989011594U patent/JPH0612165Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02103114U (en) | 1990-08-16 |
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