JP2002235541A - Exhaust system for engine - Google Patents
Exhaust system for engineInfo
- Publication number
- JP2002235541A JP2002235541A JP2001032805A JP2001032805A JP2002235541A JP 2002235541 A JP2002235541 A JP 2002235541A JP 2001032805 A JP2001032805 A JP 2001032805A JP 2001032805 A JP2001032805 A JP 2001032805A JP 2002235541 A JP2002235541 A JP 2002235541A
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- baffle plate
- water passage
- exhaust
- 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.)
- Granted
Links
- 239000000498 cooling water Substances 0.000 claims abstract description 114
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000470 constituent Substances 0.000 abstract description 7
- 230000006866 deterioration Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000002542 deteriorative effect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、排気ガスを冷却水
と混合して外部へ排出するエンジンの排気装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust system for an engine that mixes exhaust gas with cooling water and discharges the mixed gas to the outside.
【０００２】[0002]
【従来の技術】一般的に、プレジャー用等の小型船舶用
のエンジンには低振動性が要求されるため、該エンジン
は防振支持することが必要である。また、振動している
エンジンからの排気を船外へ排出するためには、ゴムホ
ース等の可撓性部材にて配管する必要がある。この場
合、エンジンからの排気ガスは高温であるため、排気ガ
スに冷却水を混合して冷却した上で排出するように構成
した所謂ミキシング構造の排気装置が採用されている。
この排気装置は、例えば図７に示すように、排気マニホ
ルドから延出される内筒１１０の周囲に、冷却水を供給
するための冷却水管１１２を有する外筒１１１を配設し
た構造のミキシングエルボ１０１を設けるとともに、船
体に冷却水混じりの排気を排出するための排気口を設け
て、該ミキシングエルボ１０１と排気口とを、ゴムホー
ス等の可撓性部材で構成される排気管１０２にて接続し
たものとなっている。2. Description of the Related Art Generally, an engine for a small boat for pleasure or the like is required to have low vibration, and therefore, it is necessary to support the engine with vibration isolation. Further, in order to discharge the exhaust gas from the vibrating engine to the outside of the ship, it is necessary to perform piping with a flexible member such as a rubber hose. In this case, since the exhaust gas from the engine has a high temperature, a so-called mixing structure exhaust device configured to mix the exhaust gas with the cooling water, cool the exhaust gas, and then discharge the cooled water is employed.
As shown in FIG. 7, for example, this exhaust device has a mixing elbow 101 having a structure in which an outer cylinder 111 having a cooling water pipe 112 for supplying cooling water is arranged around an inner cylinder 110 extending from an exhaust manifold. And an exhaust port for discharging exhaust mixed with cooling water is provided on the hull, and the mixing elbow 101 and the exhaust port are connected by an exhaust pipe 102 formed of a flexible member such as a rubber hose. It has become something.
【０００３】[0003]
【発明が解決しようとする課題】前述の如く構成された
排気装置においては、排気流量及び冷却水流量が多い高
速運転時に、内筒１１０と外筒１１１との間に構成され
る冷却水通路１１３の全体に亘って冷却水が流れ、排気
ガス及び外筒の冷却が充分行われるように構成されてい
る。従って、低速運転時には冷却水が冷却水通路１１３
の下部にしか流れず（図７に示す状態）、排気ガス及び
外筒の冷却が充分に行われないので、低速運転で長時間
使用されるフィッシング等ではゴム部材等で構成される
排気管１０２の劣化が早くなり、耐久性・信頼性が低下
する要因となっていた。In the exhaust system configured as described above, the cooling water passage 113 formed between the inner cylinder 110 and the outer cylinder 111 during high-speed operation in which the exhaust flow rate and the cooling water flow rate are large. The cooling water flows over the entirety of the device, and the exhaust gas and the outer cylinder are sufficiently cooled. Therefore, during low-speed operation, the cooling water
7 (the state shown in FIG. 7), and the exhaust gas and the outer cylinder are not sufficiently cooled. Therefore, in fishing or the like used for a long time at low speed operation, the exhaust pipe 102 made of a rubber member or the like is used. Deterioration is accelerated and durability and reliability are reduced.
【０００４】[0004]
【課題を解決するための手段】本発明の解決しようとす
る課題は以上の如くであり、次に該課題を解決するため
の手段を説明する。即ち、請求項１においては、排気ガ
スを冷却水と混合して外部へ排出するエンジンの排気構
造において、冷却水が通過する冷却水通路に、通水孔を
有する邪魔板を設けて、冷却水の流れを規制する。The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, in the exhaust structure of an engine in which exhaust gas is mixed with cooling water and discharged to the outside, a baffle plate having a water passage hole is provided in a cooling water passage through which the cooling water passes. Regulate the flow of
【０００５】また、請求項２においては、前記邪魔板の
通水孔の面積を、邪魔板下部側に対して上部側を大きく
形成した。In the present invention, the area of the water hole of the baffle plate is formed larger on the upper side than on the lower side of the baffle plate.
【０００６】また、請求項３においては、前記邪魔板の
下部にドレン孔を形成した。According to a third aspect of the present invention, a drain hole is formed below the baffle plate.
【０００７】また、請求項４においては、前記邪魔板を
複数設けた。According to a fourth aspect of the present invention, a plurality of the baffle plates are provided.
【０００８】また、請求項５においては、前記邪魔板の
通水孔を複数の丸孔にて形成した。According to a fifth aspect of the present invention, the water holes of the baffle plate are formed by a plurality of round holes.
【０００９】また、請求項６においては、前記邪魔板の
通水孔を切欠孔にて形成した。According to a sixth aspect of the present invention, the water passage hole of the baffle plate is formed by a notch hole.
【００１０】また、請求項７においては、前記邪魔板に
形成される通水孔の総面積を、冷却水通路へ冷却水を供
給する冷却水入口通路の面積の１．２倍〜２．０倍の面
積とする。According to a seventh aspect of the present invention, the total area of the water holes formed in the baffle plate is 1.2 to 2.0 times the area of the cooling water inlet passage for supplying the cooling water to the cooling water passage. Double the area.
【００１１】[0011]
【発明の実施の形態】次に、本発明の実施の形態を説明
する。図１は本発明の排気装置を具備するエンジンを搭
載した小型船舶を示す概略図、図２はミキシングエルボ
が付設されるエンジンを示す側面図、図３はミキシング
エルボの側面断面及び該ミキシングエルボに設けられる
邪魔板の正面を示す図、図４はミキシングエルボを示す
底面断面図、図５はミキシングエルボの第二の実施例の
側面断面及び該ミキシングエルボに設けられる邪魔板の
正面を示す図、図６はミキシングエルボの第三の実施例
の側面断面及び該ミキシングエルボに設けられる邪魔板
の正面を示す図、図７は従来のミキシングエルボを示す
側面断面図である。Next, an embodiment of the present invention will be described. FIG. 1 is a schematic view showing a small boat equipped with an engine having the exhaust device of the present invention, FIG. 2 is a side view showing an engine provided with a mixing elbow, and FIG. FIG. 4 is a bottom sectional view showing a mixing elbow, FIG. 5 is a side sectional view of a mixing elbow according to a second embodiment, and FIG. 4 is a diagram showing a front view of a baffle provided on the mixing elbow. FIG. 6 is a side sectional view showing a third embodiment of a mixing elbow and a front view of a baffle provided on the mixing elbow, and FIG. 7 is a side sectional view showing a conventional mixing elbow.
【００１２】まず、本発明の排気装置を具備し、小型船
舶に搭載されるエンジンの概略構成ついて図１、図２に
より説明する。エンジン１は小型船舶の船体５内に設置
されており、該エンジン１には、排気ガスと冷却水とを
混合するミキシングエルボ２が付設されている。一方、
船体５の後端部には冷却水と混合された排気ガスを外部
へ排出するための排気口５ａが設けられており、該排気
口５ａとミキシングエルボ２とは、ゴムホース等の可撓
性部材により構成される排気管３により接続されてい
る。First, a schematic configuration of an engine equipped with the exhaust device of the present invention and mounted on a small boat will be described with reference to FIGS. The engine 1 is installed in a hull 5 of a small boat, and the engine 1 is provided with a mixing elbow 2 for mixing exhaust gas and cooling water. on the other hand,
An exhaust port 5a for discharging exhaust gas mixed with cooling water to the outside is provided at the rear end of the hull 5, and the exhaust port 5a and the mixing elbow 2 are formed of a flexible member such as a rubber hose. Are connected by an exhaust pipe 3 composed of
【００１３】次に、本発明の排気装置を構成するミキシ
ングエルボ２の部分の構成について説明する。図３、図
４に示すように、ミキシングエルボ２は、内筒２１と、
外筒２２と、冷却水管２３と、邪魔板２５とで構成され
ている。Next, the structure of the mixing elbow 2 constituting the exhaust device of the present invention will be described. As shown in FIGS. 3 and 4, the mixing elbow 2 includes an inner cylinder 21,
It comprises an outer cylinder 22, a cooling water pipe 23, and a baffle plate 25.
【００１４】内筒２１は途中部で屈曲された管状部材で
あり、その一端部２１ａがエンジン１の排気マニホルド
と接続されて、該内筒２１内を排気ガスが通過する。外
筒２２は箱形状又は管状に形成され、内筒２１の周囲を
覆っている。該外筒２２の一端部（図４における上端
部）に形成される冷却水入口通路２２ａには冷却水管２
３が接続されて、該冷却水管２３から外筒２２内へ冷却
水が供給される。また、外筒２２の他端部（図４におけ
る下端部）は開放しており、該他端部には前記排気管３
が接続されている。該外筒２２と内筒２１との間に冷却
水通路２４が形成されている。The inner cylinder 21 is a tubular member bent at an intermediate portion. One end 21a of the inner cylinder 21 is connected to an exhaust manifold of the engine 1, and exhaust gas passes through the inner cylinder 21. The outer cylinder 22 is formed in a box shape or a tubular shape, and covers the periphery of the inner cylinder 21. A cooling water pipe 2 is provided in a cooling water inlet passage 22a formed at one end (upper end in FIG. 4) of the outer cylinder 22.
3 is connected, and cooling water is supplied from the cooling water pipe 23 into the outer cylinder 22. The other end (the lower end in FIG. 4) of the outer cylinder 22 is open, and the other end is connected to the exhaust pipe 3.
Is connected. A cooling water passage 24 is formed between the outer cylinder 22 and the inner cylinder 21.
【００１５】ミキシングエルボ２の他端部（図４におけ
る下端部）における、内筒２１と外筒２２との間には邪
魔板２５が配設されており、冷却水通路２４の排気管３
側端部を塞いでいる。該邪魔板２５は円環状部材により
構成され、複数の通水孔２５ａが形成されている。該通
水孔２５ａは、丸孔形状に形成され、邪魔板２５の上部
に集中して配置されている。そして、邪魔板２５の上半
部２５Ｕの範囲における通水孔２５ａの総開口面積が、
下半部２５Ｌの範囲における通水孔２５ａの総開口面積
よりも大きくなるように構成されている。At the other end (lower end in FIG. 4) of the mixing elbow 2, a baffle plate 25 is provided between the inner cylinder 21 and the outer cylinder 22, and the exhaust pipe 3 of the cooling water passage 24 is provided.
The side edge is closed. The baffle plate 25 is formed of an annular member, and has a plurality of water passage holes 25a. The water passage hole 25 a is formed in a round hole shape, and is arranged concentrated on the upper part of the baffle plate 25. And the total opening area of the water passage hole 25a in the range of the upper half 25U of the baffle plate 25 is
It is configured to be larger than the total opening area of the water holes 25a in the range of the lower half 25L.
【００１６】この通水孔２５ａにより冷却水通路２４内
の冷却水が排気管３内に流入可能となっているが、邪魔
板２５に形成される通水孔２５ａの総開口面積は、冷却
水通路２４の通路断面積よりも小さいので、冷却水通路
２４から排気管３への冷却水の流れが、邪魔板２５によ
って規制されることとなる。Although the cooling water in the cooling water passage 24 can flow into the exhaust pipe 3 through the water passing hole 25a, the total opening area of the water passing hole 25a formed in the baffle plate 25 is Since it is smaller than the passage sectional area of the passage 24, the flow of the cooling water from the cooling water passage 24 to the exhaust pipe 3 is regulated by the baffle plate 25.
【００１７】即ち、冷却水管２３から冷却水通路２４へ
供給される冷却水量よりも、通水孔２５ａを通じて冷却
水通路２４から排気管３へ流出する冷却水量の方が少な
くなり、特に通水孔２５ａは邪魔板２５の上半部２５Ｕ
の範囲に集中して配置されているので、冷却水が該冷却
水通路２４内に溜まり易くなる。That is, the amount of cooling water flowing from the cooling water passage 24 to the exhaust pipe 3 through the water holes 25a is smaller than the amount of cooling water supplied from the cooling water pipe 23 to the cooling water passage 24. 25a is the upper half 25U of the baffle plate 25
, The cooling water tends to accumulate in the cooling water passage 24.
【００１８】これにより、冷却水量が少ない低速運転時
においても、冷却水を外筒２２の下部のみならず上部ま
で供給することができ、内筒２１及び外筒２２を全周に
亘って冷却することができる。そして、内筒２１内を流
れる排気ガス、内筒２１、及び外筒２２を充分に冷却す
ることが可能となって、外筒２２に接続され排気ガスが
流れる排気管３が劣化することを防止し、耐久性・信頼
性の向上を図ることができる。Thus, even during low-speed operation with a small amount of cooling water, the cooling water can be supplied not only to the lower part but also to the upper part of the outer cylinder 22, and the inner cylinder 21 and the outer cylinder 22 are cooled over the entire circumference. be able to. The exhaust gas flowing through the inner cylinder 21 and the inner cylinder 21 and the outer cylinder 22 can be sufficiently cooled, and the exhaust pipe 3 connected to the outer cylinder 22 and through which the exhaust gas flows can be prevented from being deteriorated. In addition, durability and reliability can be improved.
【００１９】また、邪魔板２５に形成される通水孔２５
ａは丸孔形状に形成されているので、該通水孔２５ａの
数や大きさや配置位置を容易に変更することができ、通
水孔２５ａを通過する冷却水の流量や邪魔板２５内での
通過位置の調節が容易である。さらに、通水孔２５ａは
邪魔板２５の周縁部にまで達することがないので、該邪
魔板２５と外筒２２との溶接等による接続を全周に亘っ
て行うことができ、十分な接続強度を確保することがで
きる。A water hole 25 formed in the baffle plate 25
Since a is formed in the shape of a round hole, the number, size, and arrangement position of the water passage holes 25a can be easily changed, and the flow rate of the cooling water passing through the water passage holes 25a and the inside of the baffle plate 25 can be changed. It is easy to adjust the passing position. Further, since the water passage hole 25a does not reach the peripheral edge of the baffle plate 25, the connection between the baffle plate 25 and the outer cylinder 22 by welding or the like can be performed over the entire circumference, and sufficient connection strength can be obtained. Can be secured.
【００２０】また、邪魔板２５に形成される通水孔２５
ａの総開口面積は、冷却水通路２４内への冷却水供給用
の冷却水入口通路２２ａの通路断面積に対して、１．２
倍〜２．０倍の面積となるように構成されている。この
ような面積比率とすることで、邪魔板２５による冷却水
の流路抵抗を最小限に抑えつつ、冷却水を冷却水通路２
４内に溜めることが可能となる。これにより、冷却水流
量が少ない低速運転時においても、冷却水の冷却水通路
２４から排気管３への流れを妨げずに、内筒２１及び外
筒２２を全周に亘って冷却することが可能となってい
る。A water passage hole 25 formed in the baffle plate 25
a total opening area of the cooling water inlet passage 22a for supplying the cooling water into the cooling water passage 24 is 1.2
It is configured to have an area that is twice to 2.0 times. With such an area ratio, the cooling water is supplied to the cooling water passage 2 while minimizing the flow resistance of the cooling water caused by the baffle plate 25.
4 can be stored. Thus, even during low-speed operation with a small flow rate of the cooling water, the inner cylinder 21 and the outer cylinder 22 can be cooled over the entire circumference without obstructing the flow of the cooling water from the cooling water passage 24 to the exhaust pipe 3. It is possible.
【００２１】前記邪魔板２５の下端部には、ドレン孔２
５ｂが形成されている。該ドレン孔２５ｂは通水孔２５
ａよりも小径に形成されており、運転時における該ドレ
ン孔２５ｂの通水量はごく少量である。一方、エンジン
１の停止時には、冷却水通路２４内に溜まっている海水
等の冷却水が、該ドレン孔２５ｂから徐徐に排気管３側
へ流出するので、エンジン１が搭載される小型船舶の保
管時等に、一般的に金属部材で形成される外筒２２や内
筒２１や邪魔板２５が、冷却水通路２４内に溜まった冷
却水によって腐食したり劣化したりすることを防止でき
る。The lower end of the baffle plate 25 has a drain hole 2
5b are formed. The drain hole 25b is provided with the water passage hole 25.
The diameter of the drain hole 25b is smaller than the diameter a, and the amount of water flowing through the drain hole 25b during operation is extremely small. On the other hand, when the engine 1 is stopped, the cooling water such as seawater stored in the cooling water passage 24 gradually flows out from the drain hole 25b to the exhaust pipe 3 side. At times, it is possible to prevent the outer cylinder 22, the inner cylinder 21, and the baffle plate 25, which are generally formed of a metal member, from being corroded or deteriorated by the cooling water accumulated in the cooling water passage 24.
【００２２】また、図５に示すように、前記邪魔板２５
は冷却水通路２４に複数設けてもよい。この場合、複数
の邪魔板２５の設置間隔は任意に設定可能であり、該邪
魔板２５に形成される通水孔２５ａの数や大きさや形状
や配置位置は、同じ構成にしても、互いに異なる構成に
してもよい。Further, as shown in FIG.
May be provided in the cooling water passage 24. In this case, the installation intervals of the plurality of baffle plates 25 can be arbitrarily set, and the number, size, shape, and arrangement position of the water passage holes 25a formed in the baffle plates 25 are different from each other even if they have the same configuration. It may be configured.
【００２３】このように、複数の邪魔板２５を設けるこ
とで、冷却水流量が少ない低速運転時においても、単数
の邪魔板２５を設けた場合よりもさらに多くの冷却水を
冷却水通路２４に溜めることができ、内筒２１及び外筒
２２を全周に亘って全体的に冷却することができる。こ
れにより、内筒２１内を流れる排気ガス、内筒２１、及
び外筒２２をさらに充分に冷却することが可能となっ
て、外筒２２に接続され排気ガスが流れる排気管３が劣
化することを防止し、耐久性・信頼性の向上を図ること
ができる。As described above, by providing the plurality of baffles 25, even in the low-speed operation in which the flow rate of the cooling water is small, more cooling water is supplied to the cooling water passage 24 than in the case where the single baffle 25 is provided. The inner cylinder 21 and the outer cylinder 22 can be entirely cooled over the entire circumference. As a result, the exhaust gas flowing through the inner cylinder 21, the inner cylinder 21, and the outer cylinder 22 can be further sufficiently cooled, and the exhaust pipe 3 connected to the outer cylinder 22 and through which the exhaust gas flows deteriorates. Can be prevented, and the durability and reliability can be improved.
【００２４】また、邪魔板２５は、次のように形成する
こともできる。即ち、図６に示す邪魔板５５のように、
円環形状に形成された部材の上端部を切り欠いて切欠部
５５ａを形成し、該切欠部５５ａと外筒２２との間に形
成される間隙５６を通水孔として用いるのである。該邪
魔板５５には、他に通水孔は形成されておらず、下端部
にドレン孔５５ｂが形成されているのみである。Further, the baffle plate 25 can be formed as follows. That is, like the baffle plate 55 shown in FIG.
A notch 55a is formed by cutting out the upper end of the annular member, and a gap 56 formed between the notch 55a and the outer cylinder 22 is used as a water passage hole. The baffle plate 55 has no other water passage hole, but only a drain hole 55b at the lower end.
【００２５】このように、邪魔板５５を形成すること
で、該邪魔板５５の上端部にのみ通水孔が形成されるこ
ととなり、冷却水流量が少ない低速運転時においても、
冷却水通路２４内に冷却水を溜め易く、外筒２２の上部
側へ集中的に給水することができる。これにより、内筒
２１内を流れる排気ガス、内筒２１、及び外筒２２を充
分に冷却することが可能となって、外筒２２に接続され
排気ガスが流れる排気管３が劣化することを防止し、耐
久性・信頼性の向上を図ることができる。また、冷却水
通路２４から排気管３へ冷却水を通水する通水孔は、邪
魔板５５を切り欠いて切欠部５５ａを形成するだけでよ
いので、邪魔板５５の加工が容易となって、低コスト化
を図ることができる。As described above, by forming the baffle plate 55, a water passage hole is formed only at the upper end of the baffle plate 55.
It is easy to store the cooling water in the cooling water passage 24, so that the water can be intensively supplied to the upper side of the outer cylinder 22. This makes it possible to sufficiently cool the exhaust gas flowing in the inner cylinder 21, the inner cylinder 21, and the outer cylinder 22, so that the exhaust pipe 3 connected to the outer cylinder 22 and through which the exhaust gas flows deteriorates. Prevention and improvement of durability and reliability. In addition, since the water passage hole through which the cooling water flows from the cooling water passage 24 to the exhaust pipe 3 only needs to cut out the baffle plate 55 to form the cutout portion 55a, the processing of the baffle plate 55 becomes easy. In addition, cost can be reduced.
【００２６】[0026]
【発明の効果】本発明は以上の如く構成したので、次の
ような効果を奏するのである。即ち、請求項１記載の如
く、冷却水が通過する冷却水通路に、通水孔を有する邪
魔板を設けて、冷却水の流れを規制するので、冷却水量
が少ない低速運転時においても、冷却水通路の構成部材
を全周に亘って冷却することができる。これにより、排
気ガス、及び冷却水通路の構成部材を充分に冷却するこ
とが可能となって、冷却水通路と接続され排気ガスが流
れる排気管が劣化することを防止し、耐久性・信頼性の
向上を図ることができる。As described above, the present invention has the following advantages. That is, a baffle plate having water holes is provided in the cooling water passage through which the cooling water passes to regulate the flow of the cooling water. The components of the water passage can be cooled over the entire circumference. This makes it possible to sufficiently cool the exhaust gas and the constituent members of the cooling water passage, thereby preventing the exhaust pipe connected to the cooling water passage through which the exhaust gas flows from deteriorating, and improving durability and reliability. Can be improved.
【００２７】さらに、請求項２記載の如く、前記邪魔板
の通水孔の面積を、邪魔板下部側に対して上部側を大き
く形成したので、冷却水量が少ない低速運転時において
も、冷却水を冷却水通路の下部のみならず上部まで供給
することができ、冷却水通路の構成部材を全周に亘って
冷却することができる。これにより、排気ガス、及び冷
却水通路の構成部材を充分に冷却することが可能となっ
て、冷却水通路と接続され排気ガスが流れる排気管が劣
化することを防止し、耐久性・信頼性の向上を図ること
ができる。Further, since the area of the water passage hole of the baffle plate is formed larger on the upper side than on the lower side of the baffle plate, the cooling water can be supplied even at a low speed operation with a small amount of cooling water. Can be supplied not only to the lower part but also to the upper part of the cooling water passage, and the components of the cooling water passage can be cooled over the entire circumference. As a result, it is possible to sufficiently cool the exhaust gas and the components of the cooling water passage, thereby preventing the exhaust pipe connected to the cooling water passage through which the exhaust gas flows from being deteriorated, and having durability and reliability. Can be improved.
【００２８】さらに、請求項３記載の如く、前記邪魔板
の下部にドレン孔を形成したので、エンジンが搭載され
る小型船舶の保管時等に、一般的に金属部材で形成され
る冷却水通路の構成部材や邪魔板が、冷却水通路内に溜
まった冷却水によって腐食したり劣化したりすることを
防止できる。Further, since a drain hole is formed in a lower portion of the baffle plate, a cooling water passage generally formed of a metal member when storing a small boat on which an engine is mounted, for example. It is possible to prevent the constituent members and the baffle plate from being corroded or deteriorated by the cooling water accumulated in the cooling water passage.
【００２９】さらに、請求項４記載の如く、前記邪魔板
を複数設けたので、冷却水流量が少ない低速運転時にお
いても、単数の邪魔板を設けた場合よりもさらに多くの
冷却水を冷却水通路に溜めることができ、冷却水通路の
構成部材を全周に亘って全体的に冷却することができ
る。これにより、排気ガス及び冷却水通路の構成部材を
さらに充分に冷却することが可能となって、冷却水通路
の構成部材と接続され排気ガスが流れる排気管が劣化す
ることを防止し、耐久性・信頼性の向上を図ることがで
きる。Further, since a plurality of the baffles are provided, even at the time of low-speed operation where the flow rate of the cooling water is small, more cooling water is provided than in the case where only one baffle is provided. The cooling water can be stored in the passage, and the components of the cooling water passage can be entirely cooled over the entire circumference. As a result, the exhaust gas and the constituent members of the cooling water passage can be more sufficiently cooled, and the exhaust pipe connected to the constituent member of the cooling water passage and through which the exhaust gas flows can be prevented from deteriorating.・ Improvement of reliability.
【００３０】さらに、請求項５記載の如く、前記邪魔板
の通水孔を複数の丸孔にて形成したので、該通水孔の数
や大きさや配置位置を容易に変更することができ、通水
孔を通過する冷却水の流量や邪魔板内での冷却水の通過
位置の調節が容易である。さらに、通水孔は邪魔板の周
縁部にまで達することがないので、該邪魔板と外筒との
溶接等による接続を全周に亘って行うことができ、十分
な接続強度を確保することができる。Further, since the water holes of the baffle plate are formed by a plurality of round holes, the number, size and arrangement of the water holes can be easily changed. It is easy to adjust the flow rate of the cooling water passing through the water holes and the position of the cooling water passing in the baffle plate. Further, since the water passage hole does not reach the peripheral edge of the baffle plate, the connection between the baffle plate and the outer cylinder by welding or the like can be performed over the entire circumference, and sufficient connection strength can be ensured. Can be.
【００３１】さらに、請求項６記載の如く、前記邪魔板
の通水孔を切欠孔にて形成したので、該邪魔板の上端部
にのみ通水孔を容易に形成することができ、冷却水流量
が少ない低速運転時においても、冷却水通路内に冷却水
を溜め易く、冷却水通路の上部側へ集中的に給水するこ
とができる。これにより、排気ガス及び冷却水通路の構
成部材を充分に冷却することが可能となって、冷却水通
路の構成部材と接続され排気ガスが流れる排気管が劣化
することを防止し、耐久性・信頼性の向上を図ることが
できる。また、冷却水通路から排気管へ冷却水を通水す
る通水孔は、邪魔板を切り欠いて切欠部を形成するだけ
でよいので、邪魔板の加工が容易となって、低コスト化
を図ることができる。Further, since the water passage hole of the baffle plate is formed by the cutout hole, the water passage hole can be easily formed only at the upper end portion of the baffle plate, and the cooling water can be easily formed. Even during low-speed operation with a small flow rate, the cooling water is easily stored in the cooling water passage, and water can be intensively supplied to the upper side of the cooling water passage. This makes it possible to sufficiently cool the exhaust gas and the constituent members of the cooling water passage, thereby preventing the exhaust pipe connected to the constituent member of the cooling water passage and through which the exhaust gas flows from deteriorating. Reliability can be improved. In addition, since the water holes through which the cooling water flows from the cooling water passage to the exhaust pipe need only be formed by cutting out the baffle plate, the processing of the baffle plate becomes easy, and the cost is reduced. Can be planned.
【００３２】さらに、請求項７記載の如く、前記邪魔板
に形成される通水孔の総面積を、冷却水通路へ冷却水を
供給する冷却水入口通路の面積の１．２倍〜２．０倍の
面積とするので、邪魔板による冷却水の流路抵抗を最小
限に抑えつつ、冷却水を冷却水通路内に溜めることが可
能となる。これにより、冷却水流量が少ない低速運転時
においても、冷却水の冷却水通路から排気管への流れを
妨げずに、冷却水通路の構成部材を全周に亘って冷却す
ることが可能となる。Further, the total area of the water holes formed in the baffle plate is 1.2 times to 2.times. The area of the cooling water inlet passage for supplying the cooling water to the cooling water passage. Since the area is 0 times, it is possible to store the cooling water in the cooling water passage while minimizing the flow path resistance of the cooling water due to the baffle plate. Thus, even during low-speed operation with a small flow rate of the cooling water, the components of the cooling water passage can be cooled over the entire circumference without obstructing the flow of the cooling water from the cooling water passage to the exhaust pipe. .
【図１】本発明の排気装置を具備するエンジンを搭載し
た小型船舶を示す概略図である。FIG. 1 is a schematic view showing a small boat equipped with an engine having the exhaust device of the present invention.
【図２】ミキシングエルボが付設されるエンジンを示す
側面図である。FIG. 2 is a side view showing an engine provided with a mixing elbow.
【図３】ミキシングエルボの側面断面及び該ミキシング
エルボに設けられる邪魔板の正面を示す図である。FIG. 3 is a diagram showing a side cross-section of a mixing elbow and a front view of a baffle provided on the mixing elbow.
【図４】ミキシングエルボを示す底面断面図である。FIG. 4 is a bottom sectional view showing a mixing elbow.
【図５】ミキシングエルボの第二の実施例の側面断面及
び該ミキシングエルボに設けられる邪魔板の正面を示す
図である。FIG. 5 is a diagram showing a cross-sectional side view of a second embodiment of the mixing elbow and a front view of a baffle provided on the mixing elbow.
【図６】ミキシングエルボの第三の実施例の側面断面及
び該ミキシングエルボに設けられる邪魔板の正面を示す
図である。FIG. 6 is a diagram showing a cross-sectional side view of a third embodiment of the mixing elbow and a front view of a baffle provided on the mixing elbow.
【図７】従来のミキシングエルボを示す側面断面図であ
る。FIG. 7 is a side sectional view showing a conventional mixing elbow.
１ エンジン ２ ミキシングエルボ ３ 排気管 ２１ 内筒 ２２ 外筒 ２４ 冷却水通路 ２５ 邪魔板 ２５ａ 通水孔 ２５ｂ ドレン孔 DESCRIPTION OF SYMBOLS 1 Engine 2 Mixing elbow 3 Exhaust pipe 21 Inner cylinder 22 Outer cylinder 24 Cooling water passage 25 Baffle plate 25a Water hole 25b Drain hole
Claims (7)
するエンジンの排気構造において、冷却水が通過する冷
却水通路に、通水孔を有する邪魔板を設けて、冷却水の
流れを規制することを特徴とするエンジンの排気装置。In an exhaust structure of an engine for mixing exhaust gas with cooling water and discharging the mixed gas to the outside, a baffle plate having a water passage hole is provided in a cooling water passage through which the cooling water passes, so that the flow of the cooling water is reduced. An engine exhaust device characterized by regulation.
部側に対して上部側を大きく形成したことを特徴とする
請求項１に記載のエンジンの排気装置。2. The exhaust system for an engine according to claim 1, wherein an area of a water hole of the baffle plate is formed larger on an upper side than on a lower side of the baffle plate.
ことを特徴とする請求項１又は請求項２に記載のエンジ
ンの排気装置。3. The exhaust system for an engine according to claim 1, wherein a drain hole is formed in a lower portion of the baffle plate.
る請求項１又は請求項２に記載のエンジンの排気装置。4. The engine exhaust system according to claim 1, wherein a plurality of said baffles are provided.
成したことを特徴とする請求項１又は請求項２に記載の
エンジンの排気装置。5. The exhaust system for an engine according to claim 1, wherein a water hole of the baffle plate is formed by a plurality of round holes.
たことを特徴とする請求項１又は請求項２に記載のエン
ジンの排気装置。6. The exhaust device for an engine according to claim 1, wherein a water hole of the baffle plate is formed by a notch hole.
を、冷却水通路へ冷却水を供給する冷却水入口通路の面
積の１．２倍〜２．０倍の面積とすることを特徴とする
請求項１又は請求項２に記載のエンジンの排気装置。7. The total area of water passage holes formed in the baffle plate is 1.2 to 2.0 times the area of a cooling water inlet passage for supplying cooling water to the cooling water passage. The exhaust device for an engine according to claim 1 or 2, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001032805A JP4519336B2 (en) | 2001-02-08 | 2001-02-08 | Exhaust system for marine engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001032805A JP4519336B2 (en) | 2001-02-08 | 2001-02-08 | Exhaust system for marine engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002235541A true JP2002235541A (en) | 2002-08-23 |
| JP4519336B2 JP4519336B2 (en) | 2010-08-04 |
Family
ID=18896670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001032805A Expired - Fee Related JP4519336B2 (en) | 2001-02-08 | 2001-02-08 | Exhaust system for marine engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4519336B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101501134B1 (en) * | 2013-03-29 | 2015-03-11 | 한국항공우주산업 주식회사 | Engine Cooling System For Airplane |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047696A (en) * | 2013-03-16 | 2014-09-17 | 江苏普盛动力股份有限公司 | Exhaust system at underwater flow guide plate part of outboard engine for boat |
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|---|---|---|---|---|
| JPS619514U (en) * | 1984-02-27 | 1986-01-21 | ニツコ−機材株式会社 | marine silencer |
| JPS6213724A (en) * | 1985-07-10 | 1987-01-22 | Hino Motors Ltd | Exhaust connector used in marine engine |
| JPS6243123U (en) * | 1985-09-03 | 1987-03-16 | ||
| JPS6298717U (en) * | 1985-12-12 | 1987-06-23 | ||
| JPH0291412A (en) * | 1988-09-27 | 1990-03-30 | Sanshin Ind Co Ltd | Exhaust and cooling device for internal combustion engine for boat |
| JPH0427707A (en) * | 1990-05-22 | 1992-01-30 | Sanshin Ind Co Ltd | Exhaust purifying device for ship propulsion machine |
| JPH10212944A (en) * | 1997-01-29 | 1998-08-11 | Yanmar Diesel Engine Co Ltd | Exhaust mixing structure for internal combustion engine |
| JPH11350951A (en) * | 1998-06-10 | 1999-12-21 | Yamaha Motor Co Ltd | Exhaust pipe structure of engine for small vessel |
-
2001
- 2001-02-08 JP JP2001032805A patent/JP4519336B2/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS619514U (en) * | 1984-02-27 | 1986-01-21 | ニツコ−機材株式会社 | marine silencer |
| JPS6213724A (en) * | 1985-07-10 | 1987-01-22 | Hino Motors Ltd | Exhaust connector used in marine engine |
| JPS6243123U (en) * | 1985-09-03 | 1987-03-16 | ||
| JPS6298717U (en) * | 1985-12-12 | 1987-06-23 | ||
| JPH0291412A (en) * | 1988-09-27 | 1990-03-30 | Sanshin Ind Co Ltd | Exhaust and cooling device for internal combustion engine for boat |
| JPH0427707A (en) * | 1990-05-22 | 1992-01-30 | Sanshin Ind Co Ltd | Exhaust purifying device for ship propulsion machine |
| JPH10212944A (en) * | 1997-01-29 | 1998-08-11 | Yanmar Diesel Engine Co Ltd | Exhaust mixing structure for internal combustion engine |
| JPH11350951A (en) * | 1998-06-10 | 1999-12-21 | Yamaha Motor Co Ltd | Exhaust pipe structure of engine for small vessel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101501134B1 (en) * | 2013-03-29 | 2015-03-11 | 한국항공우주산업 주식회사 | Engine Cooling System For Airplane |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4519336B2 (en) | 2010-08-04 |
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