JPH0541217Y2 - - Google Patents
Info
- Publication number
- JPH0541217Y2 JPH0541217Y2 JP1988162578U JP16257888U JPH0541217Y2 JP H0541217 Y2 JPH0541217 Y2 JP H0541217Y2 JP 1988162578 U JP1988162578 U JP 1988162578U JP 16257888 U JP16257888 U JP 16257888U JP H0541217 Y2 JPH0541217 Y2 JP H0541217Y2
- Authority
- JP
- Japan
- Prior art keywords
- condensed water
- exhaust
- muffler
- water suction
- suction port
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 48
- 230000003584 silencer Effects 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Description
【考案の詳細な説明】
〈産業上の利用分野〉
本考案は自動車等の内燃機関の排気系に組付け
て用いられるプレス加工法によつて作られる消音
器に関するもので、容易な構造を目的としたもの
である。[Detailed description of the invention] <Industrial field of application> The present invention relates to a silencer made by a press working method that is used to be assembled into the exhaust system of an internal combustion engine of an automobile, etc., and the purpose is to have a simple structure. That is.
〈従来の技術〉
スタンプドマフラーとも称され、プレス加工法
によつて製作される自動車用消音器の従来品の構
造例を第５図に示した。外部上ケース１と外部下
ケース２間へ内部上プレート３と内部下プレート
４をもなか合せにより組付けて消音室７，８，９
が形成されている。この消音器の両端部にはエン
ジンからの排気を導く入口側排気管５及び排気を
外へ導く出口側排気管６が接合される。<Prior Art> Fig. 5 shows an example of the structure of a conventional automobile silencer, which is also called a stamped muffler and is manufactured by a press working method. The internal upper plate 3 and the internal lower plate 4 are assembled between the external upper case 1 and the external lower case 2 by matching them together to form the sound deadening chambers 7, 8, 9.
is formed. An inlet side exhaust pipe 5 for guiding exhaust gas from the engine and an outlet side exhaust pipe 6 for guiding exhaust gas to the outside are connected to both ends of this muffler.
消音器は、車輌搭載上の制約から、エンジン排
気系の末端つまり車輌後尾近くに配置されるのが
一般であり、寒冷時の平坦路走行時つまりエンジ
ン低出力時、エンジンから排出される排気の温度
が低いにも係わらず排気系全体は外部の寒冷大気
によつて冷却され、特に消音器は必ず適用される
膨張形の消音室のため、外部上ケース１及び外部
下ケース２の壁温度が低下し、そのため排気巾に
含まれる水蒸気が凝結し液体の水となつて、消音
室Ａ７、消音室Ｂ８及び消音室Ｃ９内に滞留す
る。この滞留水は排気中の亜硫酸ガスや窒素酸化
物を溶解含有し、消音器の腐蝕損耗を早めるの
で、できる限り滞留させないで、外部へ排出する
必要がある。従来の消音器では、消音室Ａ７の内
部に発生した排気凝結水は外部下ケース２の排気
脈動、消音室内騒音による板場の振動軽減のため
付与する補強ビード１６を消音器の最低位置部で
はなくして形成した凝結水通路１４を経由して消
音室Ｃ９へ流れ、消音室Ｂ８の内部に発生した排
気凝結水は内部下プレート４に貫通して設けられ
た凝結水流出穴１５を経て消音室Ｃ９へ集められ
る。この内部の凝結水を排出する手段として消音
器内部の排気出口管１２へ凝結水吸上管１９が設
けられている。すなわち、消音室９の内部に発生
した排気凝結水は、内部上プレート３と内部下プ
レート４とで形成された円形断面管部１２排気出
口管の中を流れる排気流によつて発生する負の圧
力を利用し、凝結水吸上管１９により吸上出口側
排気管６を経由して消音器の外部へ排出する。 Due to vehicle mounting constraints, silencers are generally placed at the end of the engine exhaust system, near the rear of the vehicle, and are designed to reduce the amount of exhaust gas emitted from the engine when driving on flat roads in cold weather, i.e. when the engine output is low. Even though the temperature is low, the entire exhaust system is cooled by the cold air outside, and in particular, the silencer is an expansion type sound damping chamber that is always applied, so the wall temperature of the outer upper case 1 and the outer lower case 2 is low. As a result, the water vapor contained in the exhaust width condenses and becomes liquid water, which stays in the muffling chamber A7, muffling chamber B8, and muffling chamber C9. This stagnant water contains dissolved sulfur dioxide gas and nitrogen oxides in the exhaust gas, and accelerates the corrosion and wear and tear of the muffler, so it is necessary to avoid stagnation as much as possible and discharge it to the outside. In the conventional muffler, the exhaust condensed water generated inside the muffler chamber A7 is removed by reinforcing beads 16 at the lowest position of the muffler, which are applied to reduce the vibration of the board due to the exhaust pulsation of the external lower case 2 and the noise inside the muffler. Exhaust condensed water flows to the muffling chamber C9 via the condensed water passage 14 formed without removing the condensed water, and the exhaust condensed water generated inside the muffling chamber B8 flows through the condensed water outflow hole 15 provided through the internal lower plate 4 to the muffling chamber. Collected at C9. As a means for discharging this internal condensed water, a condensed water suction pipe 19 is provided to the exhaust outlet pipe 12 inside the muffler. That is, the exhaust condensed water generated inside the muffling chamber 9 is caused by the negative water generated by the exhaust flow flowing through the exhaust outlet pipe of the circular section pipe section 12 formed by the inner upper plate 3 and the inner lower plate 4. Using pressure, the condensed water is discharged to the outside of the muffler via the suction outlet side exhaust pipe 6 by the condensed water suction pipe 19.
〈考案が解決しようとする課題〉
凝結水吸上管１９は一般的には小直径の鋼管を
切断することによつて製作し、内部下プレート４
の一部である排気出口管１２の最下側壁面の貫通
穴に差し込み溶接結合させる。プレス加工法によ
つて製作されるこのような車輌用消音器で凝結水
吸上管１９及びそれを排気出口管１２へ取付ける
ための溶接作業は製造原価が高くなり、解決すべ
き課題となつていた。<Problem to be solved by the invention> The condensed water suction pipe 19 is generally manufactured by cutting a small diameter steel pipe, and the internal lower plate 4
It is inserted into a through hole in the lowermost wall surface of the exhaust outlet pipe 12, which is a part of the exhaust outlet pipe 12, and is welded and connected. In such a vehicle silencer manufactured by a press working method, the condensed water suction pipe 19 and the welding work for attaching it to the exhaust outlet pipe 12 increase manufacturing costs and have become a problem to be solved. Ta.
〈課題を解決するための手段〉
上記のような課題を本考案者は、内部下プレー
ト４へ先端部が開口した下向きの突起２０を設
け、その突起２０の先端開口部を凝結水吸上口１
３としたのである。この突起２０は基部が大径で
開口部が小径の円錐状の突起が本考案の目的達成
上好ましい。<Means for Solving the Problems> To solve the above-mentioned problems, the present inventor provided a downward protrusion 20 with an open tip on the inner lower plate 4, and used the tip opening of the protrusion 20 as a condensed water suction port. 1
It was set as 3. In order to achieve the purpose of the present invention, this projection 20 is preferably a conical projection having a large diameter base and a small diameter opening.
〈作用〉
このような構造であると、先端部が開口した下
向きの突起２０が内部下プレート４の他の部分の
成形と同時にプレス加工法により作製可能であ
り、また、これを組付け製造された消音器におい
て、その突起２０の先端開口部が凝結水吸上口と
して有効に機能を果す作用が得られる。<Function> With such a structure, the downwardly directed protrusion 20 with an open tip can be produced by a press working method at the same time as molding other parts of the inner lower plate 4, and it can also be assembled and manufactured. In this muffler, the tip opening of the protrusion 20 effectively functions as a condensed water suction port.
〈実施例〉
以下図面によつて本考案の実施例を詳細に説明
する。<Examples> Examples of the present invention will be described in detail below with reference to the drawings.
第１図〜第３図は本考案の内燃機関用消音器の
実施例であつて、第１図は内部下プレートから下
方部分の平面図である。第２図は第１図中Ａ−Ａ
断面図、第３図は同Ｂ−Ｂ断面図である。 1 to 3 show an embodiment of a muffler for an internal combustion engine according to the present invention, and FIG. 1 is a plan view of the portion below from the inner lower plate. Figure 2 is A-A in Figure 1.
The sectional view and FIG. 3 are the same BB sectional views.
これらの図にみられるように、凝結水吸上口１
３付近を除いて消音器内の構造は、第５図に示し
た従来のものとほとんど変りない。 As seen in these figures, the condensed water suction port 1
The structure inside the muffler is almost the same as the conventional one shown in FIG. 5, except for the area around 3.
貫通穴Ａ１７及び貫通穴Ｂ１８はそれぞれ消音
室Ａ７及び消音室Ｃ９の内部上プレート３と内部
下プレート４で上下に仕切られた室を連通するた
めの貫通穴である。消音室Ａ７及び消音室Ｂ８の
内部で発生するエンジン排気中の凝結水は、それ
ぞれ凝結水通路１４及び凝結水流出穴１５を経由
し消音室Ｃ９へ集まり、消音室Ｃ９の内部で発生
する凝結水と合体し、凝結水吸上口１３からエン
ジン排気によつて吸上げられ、排気出口管１２、
出口側排気管６を経て消音器の外部へ排出され
る。 The through hole A17 and the through hole B18 are through holes for communicating the chambers vertically partitioned by the internal upper plate 3 and the internal lower plate 4 of the muffling chamber A7 and muffling chamber C9, respectively. The condensed water in the engine exhaust generated inside the muffling chamber A7 and the muffling chamber B8 collects in the muffling chamber C9 via the condensed water passage 14 and the condensed water outflow hole 15, respectively, and the condensed water generated inside the muffling chamber C9 collects in the muffling chamber C9. The condensed water is sucked up by the engine exhaust from the condensed water suction port 13, and the condensed water is absorbed into the exhaust outlet pipe 12,
It is discharged to the outside of the muffler via the outlet side exhaust pipe 6.
排気出口管１２は内部上プレート３と内部下プ
レート４とのプレス成形により、それぞれ半円形
状に成形された鋼板を合せて円形断面形状に形成
する。凝結水吸上口１３は内部下プレート４のプ
レス成形により形成する。排気出口管の内径Ｄは
原則として第３図中に示す通り出口側排気管６の
内径と同一にする。第３図に示す、凝結水吸上口
１３の直径ｄ及び凝結水吸上口１３と外部下ケー
ス２の内壁との隙間Ｈの関係は次の通り決定す
る。 The exhaust outlet pipe 12 is formed by pressing the inner upper plate 3 and the inner lower plate 4 into a circular cross-sectional shape by combining semicircular steel plates. The condensed water suction port 13 is formed by press molding the inner lower plate 4. In principle, the inner diameter D of the exhaust outlet pipe is the same as the inner diameter of the outlet side exhaust pipe 6, as shown in FIG. The relationship between the diameter d of the condensed water suction port 13 and the gap H between the condensed water suction port 13 and the inner wall of the outer lower case 2 shown in FIG. 3 is determined as follows.
ｄ≦Ｄ…凝結水吸上口１３の断面積（πd2／４）
は、排気出口管１２または出口側排気管６
の断面積（πD2／４）よりも大きくしな
い。d≦D…Cross-sectional area of condensed water suction port 13 (πd 2 /4)
is the exhaust outlet pipe 12 or the outlet side exhaust pipe 6
Do not make the cross-sectional area larger than (πD 2 /4).
Ｈ≦ｄ／４…凝結水吸上口１３と外部下ケース２
の内壁との隙間Ｈの凝結水吸上口１３周辺
面積つまりπdHは、凝結水吸上口１３の断
面積つまり（πd2／４）よりも大きくしな
い。H≦d/4…Condensed water suction port 13 and external lower case 2
The peripheral area of the condensed water suction port 13, ie, πdH, of the gap H between the inner wall and the inner wall of the condensed water suction port 13 is not larger than the cross-sectional area of the condensed water suction port 13, that is, (πd 2 /4).
消音膨張を終へ、消音器から外部へ排出される
排気の平均流速を、凝結水吸上口１３と外部下ケ
ース２の内壁隙間部分では排気出口管１２及び出
口側排気管よりも高め、消音室Ｃ９内に滞留する
排気凝結水の凝結水吸上口１３からの吸上げを効
率よく実施させることを目的とする。凝結水吸上
口１３と排気出口管１２とは共に内部下プレート
４のプレス成形により一体の部品として作られる
ので、内部下プレート４の鋼板材料の性質、つま
り鋼板の伸び、絞り性能の点から第４図に示すよ
うな同一内径の円管の連続のような形状を与うる
ことは非常に困難である。 After completing the muffling expansion, the average flow velocity of the exhaust gas discharged from the muffler to the outside is made higher in the gap between the condensed water suction port 13 and the inner wall of the outer lower case 2 than in the exhaust outlet pipe 12 and the outlet side exhaust pipe, thereby muffling the sound. The purpose is to efficiently suck up the exhaust condensed water remaining in the chamber C9 from the condensed water suction port 13. Since both the condensed water suction port 13 and the exhaust outlet pipe 12 are made as an integral part by press forming the inner lower plate 4, it is important to consider the properties of the steel plate material of the inner lower plate 4, that is, the elongation and drawing performance of the steel plate. It is very difficult to create a shape like a series of circular tubes with the same inner diameter as shown in FIG.
しかしながら、第１図、第２図及び第３図に示
す凝結水吸上口１３が排気出口管１２と連続した
部分へ排気出口管１２断面積より広い断面積の室
が形成され存在することが、小さい曲げ半径の直
角曲げ管路の排気流通抵抗よりも流通抵抗が減少
し、消音器のエンジンに対する総合排気抵抗を減
少させる点で有利であり、かつ排気凝結水の吸上
げにも有利である。第３図のような円錐状突起
は、可能な限り第４図に近い、つまり円筒に近い
絞りにするものまでも、本考案の好適例である。 However, a chamber with a cross-sectional area larger than the cross-sectional area of the exhaust outlet pipe 12 may be formed in the part where the condensed water suction port 13 shown in FIGS. 1, 2, and 3 is continuous with the exhaust outlet pipe 12. , the flow resistance is lower than that of a right-angled bent pipe with a small bending radius, which is advantageous in reducing the overall exhaust resistance of the muffler to the engine, and is also advantageous in sucking up exhaust condensed water. . The conical protrusion as shown in FIG. 3 is a suitable example of the present invention, even the aperture as close as possible to that in FIG. 4, that is, as close to a cylinder as possible.
〈考案の効果〉
本考案の内燃機関用消音器は凝結水吸上口１３
が内部下プレート４と一体でプレス成形されるの
で、従来の消音器で使用されている、凝結水吸上
管は不要となり、別部品製造、溶接工費などの排
除から、安い価格の消音器を市場へ供給すること
が可能になつた。<Effect of the invention> The silencer for internal combustion engines of the invention has a condensed water suction port 13.
Since it is press-formed integrally with the inner lower plate 4, there is no need for the condensed water suction pipe used in conventional silencers, and by eliminating separate parts manufacturing and welding labor costs, a low-cost silencer can be achieved. It became possible to supply it to the market.
第１図〜第３図は本考案の内燃機関用消音器の
実施例であつて、第１図は内部下プレートから下
方部分の平面図である。第２図は第１図中Ａ−Ａ
断面図、第３図は同Ｂ−Ｂ断面図である。第４図
は凝結水吸上口の他の例の断面図である。第５図
は従来の消音器の第１図相当断面図である。
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
……入口側排気管、６……出口側排気管、７……
消音室Ａ、８……消音室Ｂ、９……消音室Ｃ、１
０……消音接続管Ａ、１１……消音接続管Ｂ、１
２……排気出口管、１３……凝結水吸上口、１４
……凝結水通路、１５……凝結水流出穴、１６…
…補強ビード、１７……貫通穴Ａ、１８……貫通
穴Ｂ、２０……突起。
1 to 3 show an embodiment of a muffler for an internal combustion engine according to the present invention, and FIG. 1 is a plan view of the portion below from the inner lower plate. Figure 2 is A-A in Figure 1.
The sectional view and FIG. 3 are the same BB sectional views. FIG. 4 is a sectional view of another example of the condensed water suction port. FIG. 5 is a sectional view corresponding to FIG. 1 of a conventional muffler. 1... External upper case, 2... External lower case, 3
...Internal upper plate, 4...Internal lower plate, 5
...Inlet side exhaust pipe, 6...Outlet side exhaust pipe, 7...
Sound deadening room A, 8... Sound deadening room B, 9... Sound deadening room C, 1
0... Silence-muffling connection pipe A, 11... Silence-muffling connection pipe B, 1
2...Exhaust outlet pipe, 13...Condensed water suction port, 14
...Condensed water passage, 15... Condensed water outflow hole, 16...
...Reinforcement bead, 17...Through hole A, 18...Through hole B, 20...Protrusion.
Claims (1)
ス１と外部下ケース２間へ内部上プレート３と
内部下プレート４とにより消音室を形成する消
音器において、内部下プレート４へ先端部が開
口した下向きの突起２０を設け、該突起２０先
端開口部を凝結水吸上口１３としてなることを
特徴とする内燃機関用消音器。 ２ 突起２０が円錐状突起である請求項１記載の
内燃機関用消音器。[Claims for Utility Model Registration] 1. In a muffler that forms a muffling chamber between an outer upper case 1 and an outer lower case 2 by an inner upper plate 3 and an inner lower plate 4, the inner A silencer for an internal combustion engine, characterized in that a downward protrusion 20 with an open tip is provided on the lower plate 4, and the opening at the tip of the protrusion 20 serves as a condensed water suction port 13. 2. The muffler for an internal combustion engine according to claim 1, wherein the projection 20 is a conical projection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988162578U JPH0541217Y2 (en) | 1988-12-14 | 1988-12-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988162578U JPH0541217Y2 (en) | 1988-12-14 | 1988-12-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0283324U JPH0283324U (en) | 1990-06-27 |
| JPH0541217Y2 true JPH0541217Y2 (en) | 1993-10-19 |
Family
ID=31446532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988162578U Expired - Lifetime JPH0541217Y2 (en) | 1988-12-14 | 1988-12-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0541217Y2 (en) |
-
1988
- 1988-12-14 JP JP1988162578U patent/JPH0541217Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0283324U (en) | 1990-06-27 |
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