JP2819117B2 - Outboard exhaust gas passage - Google Patents
Outboard exhaust gas passageInfo
- Publication number
- JP2819117B2 JP2819117B2 JP8175449A JP17544996A JP2819117B2 JP 2819117 B2 JP2819117 B2 JP 2819117B2 JP 8175449 A JP8175449 A JP 8175449A JP 17544996 A JP17544996 A JP 17544996A JP 2819117 B2 JP2819117 B2 JP 2819117B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- expansion chamber
- sub
- engine
- passage
- 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
- 239000000498 cooling water Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
- F01N2590/02—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications
- F01N2590/021—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications for outboard engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
- F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
- F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for marine engines
Landscapes
- Exhaust Silencers (AREA)
- Exhaust Gas After Treatment (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、船外機の排気ガス
通路に関しし、特にアイドル時の副排気路の構成に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas passage for an outboard motor, and more particularly to a structure of an auxiliary exhaust passage at idle.
【０００２】[0002]
【従来の技術】従来、特開昭６０ー６４０９６号公報に
示すような船外機が提案されている。この船外機は、ケ
―シングの上部にエキゾ―ストガイドで支持されたエン
ジンを配置し、該エンジンの排気ポ―トに連通する排気
管をエンジンの下方に形成した排気膨張室内に伸長配置
し、該排気膨張室に主排気路とアイドル時の排気路とな
る副排気路とをそれぞれ連通させた船外機の排気ガス通
路であって、前記副排気路を前記排気膨張室の外側でケ
―シング内に形成している。2. Description of the Related Art Conventionally, an outboard motor as disclosed in Japanese Patent Application Laid-Open No. 60-64096 has been proposed. In this outboard motor, an engine supported by an exhaust guide is disposed above a casing, and an exhaust pipe communicating with an exhaust port of the engine extends and extends into an exhaust expansion chamber formed below the engine. An exhaust gas passage of an outboard motor in which a main exhaust passage and a sub exhaust passage serving as an exhaust passage at the time of idling communicate with the exhaust expansion chamber, wherein the sub exhaust passage is provided outside the exhaust expansion chamber. Formed in the casing.
【０００３】[0003]
【発明が解決しようとする課題】ところで、この先行技
術の構成によると、副排気路が排気膨張室の外側でケ―
シング内にのみ形成されていることから、アイドル時の
エンジン騒音を低減させるために副排気路を長くするの
に、副排気路をケ―シング内で排気膨張室のまわりに形
成することが容易ではなく、またその構成が複雑となっ
て、十分なエンジン騒音の低減ができない、という問題
がある。According to the structure of the prior art, the auxiliary exhaust passage is provided outside the exhaust expansion chamber.
Because it is formed only in the shing, it is easy to form the sub exhaust passage around the exhaust expansion chamber in the casing to lengthen the sub exhaust passage to reduce engine noise during idling. However, there is a problem that the configuration is complicated and the engine noise cannot be sufficiently reduced.
【０００４】本発明は、従来の技術の有するこのような
問題点に鑑みてなされたものであり、その目的とすると
ころは、ケ―シングの上部のエキゾ―ストガイドを利用
することにより、副排気路を簡単な構成で長く、しかも
容易に形成することができて、アイドル時のエンジン騒
音を十分に低減させ得る船外機の排気ガス通路を提供し
ようとするものである。The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to utilize an exhaust guide on an upper portion of a casing to provide a secondary device. An object of the present invention is to provide an exhaust gas passage for an outboard motor that can easily and easily form an exhaust passage with a simple configuration and that can sufficiently reduce engine noise during idling.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明における船外機の排気ガス通路は、ケ―シン
グの上部にエキゾ―ストガイドで支持されたエンジンを
配置し、該エンジンの排気ポ―トに連通する排気管をエ
ンジンの下方に形成した排気膨張室内に伸長配置し、該
排気膨張室に主排気路とアイドル時の排気路となる副排
気路とをそれぞれ連通させた船外機の排気ガス通路にお
いて、前記副排気路の一部をエキゾ―ストガイドに形成
し、排気膨張室内とケ―シング内とを接続する副排気路
のＵタ―ン部としたことを特徴とするものである。In order to achieve the above object, an exhaust gas passage for an outboard motor according to the present invention is provided with an engine supported by an exhaust guide above a casing. An exhaust pipe communicating with the exhaust port is extended and disposed in an exhaust expansion chamber formed below the engine, and a main exhaust path and a sub-exhaust path serving as an exhaust path at idle are respectively connected to the exhaust expansion chamber. In the exhaust gas passage of the outboard motor, a part of the sub exhaust passage is formed as an exhaust guide, and a U-turn portion of the sub exhaust passage connecting the exhaust expansion chamber and the inside of the casing is provided. It is a feature.
【０００６】また、前記エキゾ―ストガイド内及びケ―
シング内とにそれぞれ副排気路の膨張室を形成したこと
を特徴とするものである。Further, the inside of the exhaust guide and the case
An expansion chamber of a sub-exhaust passage is formed in each of the shings.
【０００７】[0007]
【発明の実施の形態】図１および図２には本発明の実施
例が示されている。そして、図１は本発明の実施例を一
部破断して示す側面図、図２は図１のＩＩ―ＩＩ線に沿
う断面図である。1 and 2 show an embodiment of the present invention. FIG. 1 is a side view showing an embodiment of the present invention, partially cut away, and FIG. 2 is a sectional view taken along line II-II in FIG.
【０００８】図において船外機１０は、船体１１に取付
けられたクランプブラケット１２と、クランプブラケッ
ト１２にチルト軸１３を介して連結されているスイベル
ブラケット１４と、スイベルブラケット１４に転舵軸１
５を介して連結されている推進ユニット１６とを有して
いる。推進ユニット１６は、チルト軸１３を回動中心と
してチルトアップ／ダウンできるとともに、転舵軸１５
を回動中心として転舵できる。In the figure, an outboard motor 10 includes a clamp bracket 12 attached to a hull 11, a swivel bracket 14 connected to the clamp bracket 12 via a tilt shaft 13, and a steering shaft 1 attached to the swivel bracket 14.
And a propulsion unit 16 that is connected to the propulsion unit 16 through the propulsion unit 5. The propulsion unit 16 is capable of tilting up / down around the tilt shaft 13 as a rotation center, and
Can be turned around the center of rotation.
【０００９】推進ユニット１６は、転舵軸１５の上下両
端部に連結部材１７，１８を介して連結される上下のケ
―シング１９，２０と、上ケ―シング１９の上部に上下
２枚の中間板２１Ａ，２１Ｂからなるエキゾ―ストガイ
ドを介して配置されるエンジン２２と、下ケ―シング２
０の下部に配置されるプロペラ２３を有して構成され
る。そして、エンジン２２の出力は、ケ―シング１９，
２０の内部に配設されているドライブ軸２４、前後進切
換歯車列２５、プロペラ軸２６を経てプロペラ２３に伝
えられる。The propulsion unit 16 includes upper and lower casings 19 and 20 connected to upper and lower ends of the steered shaft 15 via connecting members 17 and 18, and two upper and lower casings above the upper casing 19. An engine 22 disposed via an exhaust guide composed of intermediate plates 21A and 21B, and a lower casing 2
0 is provided with a propeller 23 disposed below. The output of the engine 22 is
The power is transmitted to a propeller 23 via a drive shaft 24, a forward / reverse switching gear train 25, and a propeller shaft 26 provided inside 20.
【００１０】なお、この実施例のエンジン２２は４サイ
クルエンジンであり、図において、２７はオイルタン
ク、２８はオイルポンプ、２９はオイルフィルタであ
る。The engine 22 of this embodiment is a four-stroke engine. In the figure, 27 is an oil tank, 28 is an oil pump, and 29 is an oil filter.
【００１１】また、船外機１０は冷却水ポンプ３０を備
えている。冷却水ポンプ３０は、上ケ―シング１９の内
部のドライブ軸２４まわりに配置され、ドライブ軸２４
の回転により駆動され、外水取入口３１、吸込路３２を
介して吸込んだ冷却水を、圧送管３３によりエンジン２
２の冷却水ジャケットに圧送する。The outboard motor 10 has a cooling water pump 30. The cooling water pump 30 is disposed around the drive shaft 24 inside the upper casing 19,
The cooling water which is driven by the rotation of the engine 2 and sucked through the outside water intake 31 and the suction passage 32 is supplied to the engine 2 by the pressure feed pipe 33.
Pump into the cooling water jacket of No. 2.
【００１２】また、前記上ケ―シング１９内のエンジン
２２に隣接する上部位置には排気膨張室３４を形成し、
該上ケ―シング１９内の排気膨張室３４まわりには冷却
水ジャケット３５を形成している。該冷却水ジャケット
３５には、前記エンジン２２を冷却した後の冷却水がエ
ンジン２２の排水口から供給され、該冷却水ジャケット
３５で上ケ―シング１９の内壁３６の冷却とその外壁３
７に対する遮熱を行い、周辺部品の温度上昇を防止する
ようになっている。An exhaust expansion chamber 34 is formed in an upper position adjacent to the engine 22 in the upper casing 19,
A cooling water jacket 35 is formed around the exhaust expansion chamber 34 in the upper casing 19. Cooling water after cooling the engine 22 is supplied to the cooling water jacket 35 from a drain port of the engine 22. The cooling water jacket 35 cools the inner wall 36 of the upper casing 19 and cools the outer wall 3.
7 to prevent the temperature of peripheral components from rising.
【００１３】また、エンジン２２の排気ポ―トに連通す
る排気管３８が、前記中間板２１Ａ，２１Ｂに設けられ
ている上流側排気通路３９に接続されるように下中間板
２１Ｂの下面に固定され、排気膨張室３４の周囲壁から
離れる状態で排気膨張室３４内に伸長配置されている。An exhaust pipe 38 communicating with an exhaust port of the engine 22 is fixed to a lower surface of the lower intermediate plate 21B so as to be connected to an upstream exhaust passage 39 provided in the intermediate plates 21A and 21B. It is extended into the exhaust expansion chamber 34 at a distance from the peripheral wall of the exhaust expansion chamber 34.
【００１４】この排気管３８内には排気ガス浄化用触媒
４０が配置され、耐熱容器としての排気管３８の内周と
触媒４０の外周との間には断熱材４１が配置されてい
る。An exhaust gas purifying catalyst 40 is disposed in the exhaust pipe 38, and a heat insulating material 41 is disposed between the inner periphery of the exhaust pipe 38 as a heat-resistant container and the outer periphery of the catalyst 40.
【００１５】なお、前記下ケ―シング２２には、前記排
気膨張室３４の下端部が連通される下流側主排気通路４
２が設けられ、この下流側主排気通路４２は前記プロペ
ラ２３のボス部に設けた排気放出口４３に連なり、排気
ガスを水中に放出することとしている。The lower casing 22 has a downstream main exhaust passage 4 to which a lower end of the exhaust expansion chamber 34 communicates.
The downstream main exhaust passage 42 is connected to an exhaust discharge port 43 provided in a boss portion of the propeller 23, and discharges exhaust gas into water.
【００１６】ところで、エキゾ―ストガイドを構成する
前記中間板２１Ａ，２１Ｂには、前記排気膨張室３４の
上部に連なる副膨張室４４が形成され、上ケ―シング１
９の後部上端部には前記副膨張室４４に連なる副膨張室
４５が形成され、これら排気膨張室３４の上部とエキゾ
―ストガイド内の副膨張室４４と上ケ―シング１９の後
部上端部とによって、排気膨張室３４内とケ―シング１
９内とを接続する副排気路のＵタ―ン部は形成される。
そして前記副膨張室４５は上ケ―シング１９の後部上端
部に設けた副放出口４６を介して外部空間に連通してお
り、これらの副排気通路系は、ケ―シング１９内に浸入
する水位の高いアイドル時の排気の通路として機能する
ものである。なお、Ｌは停船時の海水面水位である。The intermediate plates 21A and 21B constituting the exhaust guide are formed with a sub-expansion chamber 44 connected to the upper part of the exhaust expansion chamber 34.
9, a sub-expansion chamber 45 connected to the sub-expansion chamber 44 is formed at an upper end of the rear expansion chamber 44. By this, the inside of the exhaust expansion chamber 34 and the casing 1
The U-turn portion of the sub exhaust passage connecting the inside of the fuel cell 9 is formed.
The sub-expansion chamber 45 communicates with the external space via a sub-discharge port 46 provided at the rear upper end of the upper casing 19, and these sub-exhaust passage systems penetrate into the casing 19. It functions as an exhaust passage at idle when the water level is high. L is the sea level at the time of the stop.
【００１７】以上のような構成からなるので、エンジン
２２の駆動により、アイドル時には、エンジン２２から
の排気は、排気ポ―トから上流側排気通路３９，排気管
３８、排気膨張室３４、エキゾ―ストガイド内の副膨張
室４４、上ケ―シング１９内の副膨張室４５を通って副
放出口４６から外部に排出される。With the above-described structure, the exhaust from the engine 22 is driven from the exhaust port to the upstream exhaust passage 39, the exhaust pipe 38, the exhaust expansion chamber 34, the exhaust The air is discharged from the auxiliary discharge port 46 to the outside through the auxiliary expansion chamber 44 in the strike guide and the auxiliary expansion chamber 45 in the upper casing 19.
【００１８】また、中・高速航走時等には、エンジン２
２からの排気は、排気ポ―トから上流側排気通路３９、
排気管３８、排気膨張室３４、下流側主排気通路４２を
経て排気放出口４３から水中に放出される。Also, during middle / high speed cruising, the engine 2
Exhaust gas from the exhaust port 2 is supplied from an exhaust port to an upstream exhaust passage 39,
The exhaust gas is discharged from the exhaust outlet 43 into water through the exhaust pipe 38, the exhaust expansion chamber 34, and the downstream main exhaust passage 42.
【００１９】そしてこの実施例では、前記副排気路の一
部を中間板２１Ａ，２１Ｂからなるエキゾ―ストガイド
に形成したので、副排気路の長さが長くなり、且つ副排
気路の一部をエキゾ―ストガイド内で形成することが容
易にでき、その構成も簡易化できる。また、前記エキゾ
―ストガイド内及びケ―シング１９内とにそれぞれ副排
気路の膨張室４４，４５を形成したので、エンジン２２
の騒音の低減が一層図れれる。In this embodiment, since a part of the sub exhaust path is formed as an exhaust guide composed of the intermediate plates 21A and 21B, the length of the sub exhaust path becomes longer and a part of the sub exhaust path is formed. Can be easily formed in the exhaust guide, and the configuration can be simplified. Further, since the expansion chambers 44 and 45 of the sub exhaust passage are formed in the exhaust guide and the casing 19, respectively,
Noise can be further reduced.
【００２０】[0020]
【発明の効果】以上詳述した本発明によれば、副排気路
の一部をエキゾ―ストガイドに形成し、排気膨張室内と
ケ―シング内とを接続する副排気路のＵタ―ン部とした
ので、副排気路の長さが長くなり、アイドル時のエンジ
ン騒音を低減させることができると共にエキゾ―ストガ
イドを利用したことから副排気路の形成が容易にでき、
その構成も簡易化できる船外機の排気ガス通路となる。According to the present invention described in detail above, a part of the sub exhaust passage is formed in the exhaust guide, and the U-turn of the sub exhaust passage connecting the exhaust expansion chamber and the casing is formed. , The length of the sub exhaust path becomes longer, engine noise during idling can be reduced, and the use of the exhaust guide makes it easier to form the sub exhaust path.
The exhaust gas passage of the outboard motor, which can also be simplified, is provided.
【００２１】請求項２においては、エキゾ―ストガイド
内及びケ―シング内とにそれぞれ副排気路の膨張室を形
成したので、エンジンの騒音の低減がさらに一層図られ
得る船外機の排気ガス通路となる。According to the second aspect of the present invention, since the expansion chamber of the auxiliary exhaust passage is formed in each of the exhaust guide and the casing, the exhaust gas of the outboard motor can further reduce the noise of the engine. It becomes a passage.
【図１】図１は本発明の実施例を一部破断して示す側面
図である。FIG. 1 is a side view showing an embodiment of the present invention with a part cut away.
【図２】図２は図１のＩＩ―ＩＩ線に沿う断面図であ
る。FIG. 2 is a sectional view taken along the line II-II in FIG.
１０ 船外機 １９ ケ―シング ２１Ａ，２１Ｂ エキゾ―ストガイド（中間
板） ２２ エンジン ３４ 排気膨張室 ３８ 排気管 ４４，４５，４６ 副排気路Reference Signs List 10 outboard motor 19 casing 21A, 21B exhaust guide (intermediate plate) 22 engine 34 exhaust expansion chamber 38 exhaust pipe 44, 45, 46 sub exhaust path
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) F01N 1/08 F01N 3/02 F01N 7/12 F02B 67/00Continuation of the front page (58) Field surveyed (Int.Cl. 6 , DB name) F01N 1/08 F01N 3/02 F01N 7/12 F02B 67/00
Claims (2)
で支持されたエンジンを配置し、該エンジンの排気ポ―
トに連通する排気管をエンジンの下方に形成した排気膨
張室内に伸長配置し、該排気膨張室に主排気路とアイド
ル時の排気路となる副排気路とをそれぞれ連通させた船
外機の排気ガス通路において、前記副排気路の一部をエ
キゾ―ストガイドに形成し、排気膨張室内とケ―シング
内とを接続する副排気路のＵタ―ン部としたことを特徴
とする船外機の排気ガス通路。An engine supported by an exhaust guide is disposed above a casing, and an exhaust port of the engine is provided.
An exhaust pipe communicating with the engine extends out of an exhaust expansion chamber formed below the engine, and the exhaust expansion chamber communicates with a main exhaust path and a sub exhaust path serving as an exhaust path at idle. In the exhaust gas passage, a part of the sub exhaust passage is formed as an exhaust guide, and a U-turn portion of the sub exhaust passage connecting the exhaust expansion chamber and the inside of the casing is provided. Exhaust gas passage of external unit.
グ内とにそれぞれ副排気路の膨張室を形成したことを特
徴とする請求項１記載の船外機の排気ガス通路。2. An exhaust gas passage for an outboard motor according to claim 1, wherein expansion chambers for sub exhaust passages are formed in the exhaust guide and the casing, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8175449A JP2819117B2 (en) | 1996-06-17 | 1996-06-17 | Outboard exhaust gas passage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8175449A JP2819117B2 (en) | 1996-06-17 | 1996-06-17 | Outboard exhaust gas passage |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1156653A Division JP2832364B2 (en) | 1989-06-21 | 1989-06-21 | Outboard exhaust gas purification system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09105322A JPH09105322A (en) | 1997-04-22 |
| JP2819117B2 true JP2819117B2 (en) | 1998-10-30 |
Family
ID=15996278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8175449A Expired - Lifetime JP2819117B2 (en) | 1996-06-17 | 1996-06-17 | Outboard exhaust gas passage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2819117B2 (en) |
-
1996
- 1996-06-17 JP JP8175449A patent/JP2819117B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09105322A (en) | 1997-04-22 |
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