JPH03246312A - Silencer for automobile - Google Patents
Silencer for automobileInfo
- Publication number
- JPH03246312A JPH03246312A JP4325790A JP4325790A JPH03246312A JP H03246312 A JPH03246312 A JP H03246312A JP 4325790 A JP4325790 A JP 4325790A JP 4325790 A JP4325790 A JP 4325790A JP H03246312 A JPH03246312 A JP H03246312A
- Authority
- JP
- Japan
- Prior art keywords
- expansion chamber
- chamber
- tube
- inlet tube
- resonance
- 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.)
- Pending
Links
- 230000003584 silencer Effects 0.000 title claims abstract description 11
- 230000005855 radiation Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 230000001743 silencing effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、自動車用消音器に関する。[Detailed description of the invention] Industrial applications The present invention relates to a silencer for automobiles.
従来の技術
従来の排気系に装着され、排気吐出音を低減する自動車
用消音器としては、例えば第６図に示すようなものがあ
る（実開昭６３−８２０１５号公報）。2. Description of the Related Art An example of a conventional automobile silencer installed in an exhaust system to reduce exhaust discharge noise is shown in FIG. 6 (Japanese Utility Model Publication No. 82015/1983).
すなわち、消音器１０１の外殻を筒体１０２と端板１０
３で構成し、内部の第１拡張室１０４に、インレットチ
ューブ１０５と同軸上にインレットチューブ１０５の管
端側に開口する小穴１０６を設けた球状共鳴室１０７を
配置したもので、共鳴室１０７を球状に形成することに
よって、平板のみを用いた消音器に必要である、端板等
の構成部品に施されるビーディング加工等の処理を何等
必要とせずに、ドラミング現象による打音の発生を防止
しようとしている。That is, the outer shell of the silencer 101 is connected to the cylindrical body 102 and the end plate 10.
3, in which a spherical resonance chamber 107 with a small hole 106 opening at the end of the inlet tube 105 is disposed coaxially with the inlet tube 105 in the first expansion chamber 104. By forming it into a spherical shape, there is no need for beading or other processing on component parts such as end plates, which is required for silencers using only flat plates, and the generation of hammering noise due to the drumming phenomenon is eliminated. trying to prevent it.
発明が解決しようとする課題
しかしながら、このような従来の自動車用消音器にあっ
ては、球状共鳴室１０７を配置している外側の筒体１０
２および端板１０３は平板で構成されているため、放射
音が発生しやすい。また、共鳴室１０７は球状であるた
め、共鳴室１０７の外側部分に沿って流れる排気流の抵
抗は少ないが、他の部分では板どうしが９０°に交わっ
ているので、どうしてもその部分で剥離が起こり、流れ
の抵抗が大きくなってしまうという問題点があった。Problems to be Solved by the Invention However, in such a conventional automobile silencer, the outer cylindrical body 10 in which the spherical resonance chamber 107 is disposed
Since the end plate 2 and the end plate 103 are made of flat plates, radiated sound is likely to be generated. Furthermore, since the resonance chamber 107 is spherical, there is little resistance to the exhaust flow flowing along the outer part of the resonance chamber 107, but since the plates intersect at 90 degrees in other parts, separation occurs in those parts. There was a problem in that the flow resistance became large.
本発明は、従来のこのような問題点に着目してなされた
もので、放射音および背圧を低減した自動車用消音器を
提供することを目的としている。The present invention was made in view of these conventional problems, and an object of the present invention is to provide a silencer for an automobile that reduces radiated sound and back pressure.
課題を解決するための手段
このため本発明は、略球形状の共鳴室の周囲に、略球形
状の拡張室を配置するとともに、拡張室に設置したイン
レットチューブに対向させて共鳴室の首管を配設した。Means for Solving the Problems Therefore, in the present invention, a substantially spherical expansion chamber is arranged around a substantially spherical resonance chamber, and a neck tube of the resonance chamber is arranged opposite to an inlet tube installed in the expansion chamber. was installed.
作用
インレットチューブから拡張室へ導入された排気ガスは
、拡張室及び共鳴室が滑らかな球形状をしているのでス
ムーズに流れ、アウトレットパイプから排出される。The exhaust gas introduced into the expansion chamber from the working inlet tube flows smoothly because the expansion chamber and the resonance chamber have a smooth spherical shape, and is discharged from the outlet pipe.
この際、拡張室は球形状をしており、大気に触れる部分
が平板でないため、排気脈動により加振されても大きく
振動せず、放射音は小さい。At this time, since the expansion chamber has a spherical shape and the part that comes into contact with the atmosphere is not a flat plate, it does not vibrate greatly even when excited by exhaust pulsation, and the radiated sound is small.
また、拡張室内を排気ガスはスムーズに流れるので排気
抵抗は小さい。Furthermore, the exhaust gas flows smoothly within the expansion chamber, so the exhaust resistance is small.
実施例
以下、本発明を図面に基づいて説明する。第１図は、本
発明の第１実施例を示す図である。EXAMPLES Hereinafter, the present invention will be explained based on the drawings. FIG. 1 is a diagram showing a first embodiment of the present invention.
まず構成を説明する。消音器ｌは、共鳴室２が２個の半
球体３及び４により略球形状に形成されており、該共鳴
室２を取り囲むように、拡張室５が２個の半球体６およ
び７により略球形状に形成されている。そして、該拡張
室５には、第２図に図示したような、複数個の大穴８を
穿設した穴開きバッフル９が取り付けられている。First, the configuration will be explained. In the muffler 1, a resonance chamber 2 is formed into a substantially spherical shape by two hemispheres 3 and 4, and an expansion chamber 5 is formed by two hemispheres 6 and 7 so as to surround the resonance chamber 2. It is formed into a spherical shape. A perforated baffle 9 having a plurality of large holes 8, as shown in FIG. 2, is attached to the expansion chamber 5.
また、拡張室５には、排気ガスを拡張室５に導入するイ
ンレットチューブ１０が取り付けられており、拡張室５
のインレットチューブ１０取り付は部と反対側には、排
気ガスを拡張室５から排出するアウトレットチューブ１
１が配設されている。Further, an inlet tube 10 for introducing exhaust gas into the expansion chamber 5 is attached to the expansion chamber 5.
On the opposite side of the inlet tube 10, there is an outlet tube 1 for discharging exhaust gas from the expansion chamber 5.
1 is arranged.
また、共鳴室２には、上流からの排気ガス流に対向する
如く、インレットチューブｌＯに対向して首管１２が取
り付けられている。Further, a neck tube 12 is attached to the resonance chamber 2 so as to face the inlet tube IO so as to face the exhaust gas flow from upstream.
次に作用を説明する。インレットチューブ１０から拡張
室５へ導入された排気ガスは、拡張室５で拡張されて消
音作用を行い、共鳴室２による共鳴により消音作用が行
われ、拡張室内をアウトレットチューブ１１に向って流
れアウトレットチューブ１１より排出される。Next, the effect will be explained. Exhaust gas introduced from the inlet tube 10 to the expansion chamber 5 is expanded in the expansion chamber 5 to perform a silencing effect, is silencing by resonance in the resonance chamber 2, and flows through the expansion chamber toward the outlet tube 11 to the outlet. It is discharged from the tube 11.
この際、拡張室５を半球体６及び７による球状体とした
ことにより、大気に触れる部分が平板でなくなったため
、排気脈動によりこの表皮が加振されても大きく振動す
ることがないので、大きな放射音は発生しない。At this time, by making the expansion chamber 5 into a spherical body made up of hemispheres 6 and 7, the part that comes into contact with the atmosphere is no longer a flat plate, so even if this skin is excited by exhaust pulsation, it will not vibrate greatly. No radiated sound is generated.
また、共鳴室２の外面及び拡張室５の内面が滑らかな球
状であるため、排気ガスはスムーズに流れ剥離を起こす
部分が従来の消音器より少ないので、従来の消音器に比
べ背圧は大幅に減少している。In addition, since the outer surface of the resonance chamber 2 and the inner surface of the expansion chamber 5 are smooth and spherical, the exhaust gas flows smoothly and there are fewer parts where separation occurs than in conventional silencers, so the back pressure is significantly lower than in conventional silencers. has decreased to
さらに球体は筒体に比較して、同一表面積で容積も大き
く取れるので、消音量が確保され、また、第３図に図示
した如く、車体１３に設けられているタイヤ１４を収納
するタイヤハウス１５のホイール部１６に配設すること
もできる等設置の自由度は高い。Furthermore, compared to a cylinder, a sphere can have a larger volume with the same surface area, so the amount of noise reduction is ensured, and as shown in FIG. There is a high degree of freedom in installation, as it can also be installed on the wheel portion 16 of.
さらにまた、拡張室５が球状であるため定在波ができに
くく、消音器内の共鳴により排気音が悪化することはな
く、同じく拡張室５が球状であるために、インレットチ
ューブ１０とアウトレットチューブ１１の設置場所が自
由に設定できる。また、プレス加工にも有利であり、表
面積に対する体積の比率を上げることができるため、コ
スト面でも有利となっている。Furthermore, since the expansion chamber 5 is spherical, it is difficult to form standing waves, and the exhaust noise is not worsened by resonance within the muffler. 11 installation locations can be freely set. It is also advantageous for press working, and because it can increase the ratio of volume to surface area, it is also advantageous in terms of cost.
第４図には、本発明の第２実施例を示す。この実施例は
、前述した第１実施例の穴開きバッフル９に変えて、平
板のバッフル１７を取り付け、該バッフル１７にバスチ
ューブ１８を配設し、また首管２】を共鳴室２内に挿入
突出させたものである。FIG. 4 shows a second embodiment of the invention. In this embodiment, a flat plate baffle 17 is attached in place of the perforated baffle 9 of the first embodiment, a bass tube 18 is disposed on the baffle 17, and the neck tube 2 is inserted into the resonance chamber 2. It is inserted and protruded.
本実施例によれば、バッフル１７によって拡張室が第１
拡張室１９と第２拡張室２０とに２分されているので、
中周波数の排気音低減効果を高めることができる。また
、共鳴室２内に首管２】が突出しているため、共鳴周波
数設定の自由度が大きくなる。According to this embodiment, the baffle 17 allows the expansion chamber to
Since it is divided into two parts, an expansion chamber 19 and a second expansion chamber 20,
The effect of reducing mid-frequency exhaust noise can be enhanced. Furthermore, since the neck tube 2] protrudes into the resonance chamber 2, the degree of freedom in setting the resonance frequency is increased.
第５図には、本発明の第３実施例を示す。この実施例は
、インレットチューブ２２、およびアウトレットチュー
ブ２３の拡張室５内への挿入部分をカットし、かつ首管
２４の拡張室内への挿入部分をカットしたものである。FIG. 5 shows a third embodiment of the invention. In this embodiment, the portions of the inlet tube 22 and outlet tube 23 inserted into the expansion chamber 5 are cut, and the portion of the neck tube 24 inserted into the expansion chamber is cut.
なお、本実施例においてはバッフルは第１実施例と同じ
穴開きバッフル９を使用している。Note that in this embodiment, the same perforated baffle 9 as in the first embodiment is used as the baffle.
本実施例によれば、拡張室５内への突起物が少なくなる
ため、排気ガス流の剥離が起こる部分か少なくなり、排
気抵抗を更に低減することができる。According to this embodiment, since the number of protrusions into the expansion chamber 5 is reduced, the number of parts where separation of the exhaust gas flow occurs is reduced, and the exhaust resistance can be further reduced.
発明の詳細
な説明してきたように構成されているので、本発明によ
れば、放射音、背圧を低減することができ、表面積に対
する体積の比率を上げることができるためコスト低減が
図れる。Since the invention is configured as described in detail, according to the invention, radiated sound and back pressure can be reduced, and the ratio of volume to surface area can be increased, resulting in cost reduction.
また定在波が起こり難く、消音器内の共鳴による排気音
の悪化を防ぐことができる。Furthermore, standing waves are less likely to occur, and deterioration of exhaust noise due to resonance within the muffler can be prevented.
第１図は本発明の第１実施例を示す側断面図、第２図は
第１実施例の穴開きバッフルを示す平面図、第３図は本
発明に係る消音器の車体への装着部位例を示す斜視図、
第４図は本発明の第２実施例を示す側断面図、第５図は
本発明の第３実施例を示す側断面図、第６図は従来例を
示す側断面図である。
１・・・消音器、２・・共鳴室、３．４・・・半球体、
５・・・拡張室、６．７・・・半球体、８・・・大穴、
９・・・穴開きバッフル、１０・・・インレットチュー
ブ、１１・・・アウトレットチューブ、１２・・・首管
、１５・・・タイヤハウス、１６・・・ホイール部、１
７・・・バッフル、１８・・・パスチューブ、１９・・
・第１拡張室、２０・・第２拡張室、２１・・・首管、
２２・・・インレットチューブ、２３・・・アウトレッ
トチューブ、２４・・・首管。
第２図
第３図
第４図FIG. 1 is a side sectional view showing a first embodiment of the present invention, FIG. 2 is a plan view showing a perforated baffle of the first embodiment, and FIG. 3 is a mounting portion of a silencer according to the present invention on a vehicle body. A perspective view showing an example,
FIG. 4 is a side sectional view showing a second embodiment of the invention, FIG. 5 is a side sectional view showing a third embodiment of the invention, and FIG. 6 is a side sectional view showing a conventional example. 1... Silencer, 2... Resonance chamber, 3.4... Hemisphere,
5... Expansion chamber, 6.7... Hemisphere, 8... Large hole,
9... Hole baffle, 10... Inlet tube, 11... Outlet tube, 12... Neck tube, 15... Tire house, 16... Wheel part, 1
7... Baffle, 18... Pass tube, 19...
・First expansion chamber, 20... Second expansion chamber, 21... Neck canal,
22... Inlet tube, 23... Outlet tube, 24... Neck tube. Figure 2 Figure 3 Figure 4
Claims (1)
おいて、略球形状の共鳴室の周囲に、略球形状の拡張室
を配置するとともに、拡張室に設置したインレットチュ
ーブに対向させて共鳴室の首管を配設したことを特徴と
する自動車用消音器。(1) In an automobile silencer that reduces the exhaust noise of an automobile, a substantially spherical expansion chamber is arranged around a substantially spherical resonance chamber, and the expansion chamber is opposed to an inlet tube installed in the expansion chamber to resonate. A silencer for automobiles characterized by having a neck pipe of the chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4325790A JPH03246312A (en) | 1990-02-23 | 1990-02-23 | Silencer for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4325790A JPH03246312A (en) | 1990-02-23 | 1990-02-23 | Silencer for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03246312A true JPH03246312A (en) | 1991-11-01 |
Family
ID=12658806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4325790A Pending JPH03246312A (en) | 1990-02-23 | 1990-02-23 | Silencer for automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03246312A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6942061B2 (en) * | 2003-12-17 | 2005-09-13 | Jones Exhaust Systems, Inc. | Muffler for internal combustion engine |
| FR2874233A1 (en) * | 2004-08-16 | 2006-02-17 | Pauline Blain | Sound wave attenuation system for e.g. heat engine, has semi-sphere diffusing gas/sound or air/sound mixture, where sound waves contained in gas or air reflects inside another semi-sphere for rising in counter-direction of mixture in space |
| JP2008169751A (en) * | 2007-01-11 | 2008-07-24 | Toyota Motor Corp | Exhaust muffler structure |
| US20110209942A1 (en) * | 2010-02-26 | 2011-09-01 | Hisashi Uneta | Exhaust device of internal combustion engine |
| US20130164643A1 (en) * | 2011-12-23 | 2013-06-27 | Samsung Electronics Co., Ltd. | Silencer for reducing acoustic noise of fuel cell system |
-
1990
- 1990-02-23 JP JP4325790A patent/JPH03246312A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6942061B2 (en) * | 2003-12-17 | 2005-09-13 | Jones Exhaust Systems, Inc. | Muffler for internal combustion engine |
| FR2874233A1 (en) * | 2004-08-16 | 2006-02-17 | Pauline Blain | Sound wave attenuation system for e.g. heat engine, has semi-sphere diffusing gas/sound or air/sound mixture, where sound waves contained in gas or air reflects inside another semi-sphere for rising in counter-direction of mixture in space |
| JP2008169751A (en) * | 2007-01-11 | 2008-07-24 | Toyota Motor Corp | Exhaust muffler structure |
| US20110209942A1 (en) * | 2010-02-26 | 2011-09-01 | Hisashi Uneta | Exhaust device of internal combustion engine |
| JP2011179346A (en) * | 2010-02-26 | 2011-09-15 | Honda Motor Co Ltd | Exhaust device of internal combustion engine |
| US8348013B2 (en) * | 2010-02-26 | 2013-01-08 | Honda Motor Co., Ltd. | Exhaust device of internal combustion engine |
| US20130164643A1 (en) * | 2011-12-23 | 2013-06-27 | Samsung Electronics Co., Ltd. | Silencer for reducing acoustic noise of fuel cell system |
| US8794377B2 (en) * | 2011-12-23 | 2014-08-05 | Samsung Sdi Co., Ltd. | Silencer for reducing acoustic noise of fuel cell system |
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