JPH04134117A - Exhaust emission control device for marine propeller - Google Patents
Exhaust emission control device for marine propellerInfo
- Publication number
- JPH04134117A JPH04134117A JP25420090A JP25420090A JPH04134117A JP H04134117 A JPH04134117 A JP H04134117A JP 25420090 A JP25420090 A JP 25420090A JP 25420090 A JP25420090 A JP 25420090A JP H04134117 A JPH04134117 A JP H04134117A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- catalyst
- plate
- manifold
- exhaust manifold
- 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
- 239000003054 catalyst Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000003197 catalytic effect Effects 0.000 claims description 15
- 238000000746 purification Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 abstract description 28
- 239000000463 material Substances 0.000 abstract description 3
- 125000006850 spacer group Chemical group 0.000 abstract description 3
- 238000007751 thermal spraying Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000010349 pulsation 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2807—Metal other than sintered metal
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Silencers (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【発明の詳細な説明】 〔発明の目的〕 (産業上の利用分野) この発明は、船舶用推進機の排気浄化装置に関する。[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to an exhaust gas purification device for a marine propulsion device.
(従来の技術)
船体の尾部に装着して船体を推進させる船外機をはじめ
、船舶用推進機は、排ガスの規制がないので、従来船外
機のエンジンから排出される排ガス中に含まれているC
OおよびHCを除去するための対策は一般には施されて
いない。(Prior Technology) Since there are no exhaust gas regulations for marine propulsion engines, including outboard motors that are attached to the tail of a ship to propel the ship, conventional outboard motors do not contain any exhaust gas emitted from the outboard engine. C
Measures to remove O and HC are generally not taken.
しかし近時、海洋レジャーが普及し、今後も益々盛んに
なる傾向にあることからみて、船外機をはじめとする船
舶用推進機といえども排気中の不完全燃焼によるCOや
生ガスの吹抜けによるHCを除去することが必要となる
。However, in view of the fact that marine leisure activities have recently become popular and are expected to become even more popular in the future, even marine propulsion engines such as outboard motors can emit CO and raw gas due to incomplete combustion in the exhaust gas. It is necessary to remove HC due to
船外機の排気系は、第4図に一部を断面として示すよう
に、エンジン1の排気マニホールド2に接続されたエキ
ゾーストチューブ(パイプ)3が船外機のドライブシャ
フトハウジング4内に垂下され、このハウジング4内か
らその下部に接合されたギヤケース5内を通り、ギヤケ
ース5に軸支されたプロペラ6の駆動シャフトの周囲を
通って水中に排気されるようになっている。In the exhaust system of an outboard motor, as shown partially in cross section in FIG. 4, an exhaust tube (pipe) 3 connected to an exhaust manifold 2 of an engine 1 is suspended within a drive shaft housing 4 of the outboard motor. The air passes from inside this housing 4 through a gear case 5 joined to the lower part of the housing 4, passes around a drive shaft of a propeller 6 pivotally supported by the gear case 5, and is exhausted into the water.
このような船外機において、排気浄化策を施したものと
して、エキゾーストチューブ3の下端にハニカムタイプ
の触媒を取付け、エキゾーストチューブ3から排出され
る排気をこの触媒に接触させて排気の浄化を行なわせる
ようになされたものがある。In such an outboard motor, a honeycomb type catalyst is attached to the lower end of the exhaust tube 3, and the exhaust gas discharged from the exhaust tube 3 is brought into contact with this catalyst to purify the exhaust gas. There are things that have been done to make it possible.
(発明が解決しようとする課題)
しかしながら上記従来の排気浄化構造では、エキゾース
トチューブの下端に触媒が設けられ、この触媒がハニカ
ム状をなすので、エキゾーストチューブ3および排気マ
ニホールド2内の排圧が上ってしまい、エンジン出力が
著しく低下するという問題点があるうえ、触媒が設けら
れる位置が水面に近いため、運転中はドライブシャフト
ハウジング4内の排気脈動により、また係留中は波の影
響により触媒に水(塩水)がかかってしまい、触媒の耐
久性や浄化性能が早期に劣化してしまうという問題点か
ある。これを避けるため触媒の取付位置をエキゾースト
チューブの上方にすると、水の影響は減少するものの排
圧が一層高まってしまい、エンジン出力の低下が大巾に
増大するという欠点を生じる。(Problem to be Solved by the Invention) However, in the conventional exhaust purification structure described above, a catalyst is provided at the lower end of the exhaust tube, and this catalyst has a honeycomb shape, so that the exhaust pressure in the exhaust tube 3 and exhaust manifold 2 increases. In addition, since the catalyst is located close to the water surface, the catalyst may be damaged due to exhaust pulsation inside the drive shaft housing 4 during operation, and due to the influence of waves while moored. The problem is that the catalyst's durability and purification performance deteriorate early due to water (salt water) splashing on the catalyst. In order to avoid this, if the catalyst is installed above the exhaust tube, the influence of water will be reduced, but the exhaust pressure will further increase, resulting in a drawback that the reduction in engine output will be greatly increased.
二の発明は、エンジンの排圧を高めることがないと同時
に水による影響がなく、エンジン出力の低下を防ぎなが
ら触媒の耐久性、浄化性能の低下を防ぐことができる船
舶用推進機の排気浄化装置を提供することを目的とする
。The second invention is exhaust purification for marine propulsion engines that does not increase engine exhaust pressure, is not affected by water, prevents a decrease in engine output, and prevents a decrease in catalyst durability and purification performance. The purpose is to provide equipment.
(課題を解決するための手段)
上記目的を達成するため、この発明では、表面に触媒を
溶射したキャタリストエキゾーストプレートを排気マニ
ホールド内に排気の流れにそって層状に配設したことを
特徴とするものである。(Means for Solving the Problems) In order to achieve the above object, the present invention is characterized in that a catalytic exhaust plate whose surface is thermally sprayed with a catalyst is arranged in a layered manner along the flow of exhaust gas within the exhaust manifold. It is something to do.
(作用)
エンジンの排気ポートから排出された排ガスは、排気マ
ニホールド内に層状に配設されたキャタリストエキゾー
ストプレート間を通ってエキゾーストチューブへ流れる
。このとき排気はキャタリストエキゾーストプレートの
表面にそって流れるので、その表面に担持されている触
媒と接触する機会が多く与えられ、排ガス中のCOやH
Cが触媒と反応して再燃焼され、浄化される。このキャ
タリストエキゾーストプレートは排気マニホールド内に
設けられているので、水の侵入による腐食の被害がなく
、既存の推進機へも容易に実施することができる。(Operation) Exhaust gas discharged from the exhaust port of the engine flows into the exhaust tube through between the catalytic exhaust plates arranged in layers in the exhaust manifold. At this time, the exhaust gas flows along the surface of the catalytic exhaust plate, giving it many opportunities to come into contact with the catalyst supported on the surface, which removes CO and H from the exhaust gas.
C reacts with the catalyst to be re-burned and purified. Since this catalytic exhaust plate is provided within the exhaust manifold, there is no damage caused by corrosion due to water intrusion, and it can be easily applied to existing propulsion machines.
(実施例)
以下この発明に係る船舶用推進機の排気浄化装置の一実
施例について添付図面を参照して説明する。(Embodiment) An embodiment of the exhaust gas purification device for a marine propulsion device according to the present invention will be described below with reference to the accompanying drawings.
この発明は船外機やエンジンを船体内に収容した船内機
等の船舶用推進機に適用され、第1図はこの発明を船外
機の排気系に適用した例を示す。The present invention is applied to marine propulsion devices such as outboard motors and inboard motors in which the engine is housed in the hull, and FIG. 1 shows an example in which the present invention is applied to an exhaust system of an outboard motor.
図中、符号10は船外機の上部に搭載されるエンジンで
あり、このエンジン10の周りに排気マニホールド11
が形成され、この排気マニホールド11はエキゾースト
チューブ12に接続される。In the figure, reference numeral 10 is an engine mounted on the top of the outboard motor, and an exhaust manifold 11 is installed around this engine 10.
is formed, and this exhaust manifold 11 is connected to an exhaust tube 12.
エキゾーストチューブ12はドライブシャフトハウジン
グ(図示せず)内に収容され、垂下される。Exhaust tube 12 is housed and suspended within a drive shaft housing (not shown).
排気マニホールド11はエンジン10のシリンダ13に
エキゾーストプレート14を取付けて構成される。この
エキゾーストプレート14には内面にボス部15が形成
され、このボス部15に複数枚(図示例では3枚)のキ
ャタリストエキゾーストプレート16がスペーサ17を
介して所定間隔を保ってボルト18により締着される。The exhaust manifold 11 is constructed by attaching an exhaust plate 14 to the cylinder 13 of the engine 10. A boss portion 15 is formed on the inner surface of the exhaust plate 14, and a plurality of catalytic exhaust plates 16 (three in the illustrated example) are fastened to the boss portion 15 with bolts 18 at predetermined intervals via spacers 17. It will be worn.
キャタリストエキゾーストプレート16は、第2図に示
すように、基材となる板材に複数の穴19が穿設され、
表面には第3図に示すように触媒20が溶射等により固
着されている。キャタリストエキゾーストプレート16
は排気の流れを妨げないよう側面形状が台形状とされ、
排気ポート22から排出される排気ガスが排気マニホー
ルド11内をスムーズに流れると共に排ガスとの接触機
会がより多く与えられるように構成されている。As shown in FIG. 2, the catalytic exhaust plate 16 has a plurality of holes 19 bored in a plate material serving as a base material.
As shown in FIG. 3, a catalyst 20 is fixed to the surface by thermal spraying or the like. Catalyst exhaust plate 16
The side profile is trapezoidal so as not to obstruct the flow of exhaust gas,
It is configured so that the exhaust gas discharged from the exhaust port 22 flows smoothly within the exhaust manifold 11 and is given more opportunities to come into contact with the exhaust gas.
上記キャタリストエキゾーストプレート16の横断面形
状を第3図のように波形断面あるいはジグザグ状、凹凸
状等とすることにより触媒20の付着面積を増大するこ
とができるので好ましい。It is preferable to make the cross-sectional shape of the catalytic exhaust plate 16 wave-like, zigzag, uneven, etc. as shown in FIG. 3 because the area to which the catalyst 20 adheres can be increased.
従ってシリンダ13の排気ポート22から排出される排
ガスは第1図の矢印のようにキャタリストエキゾースト
プレート16の間を流れ、この間に排ガス中のCOやH
Cは触媒20と反応し、その反応熱により再燃焼されて
浄化される。浄化された排ガスはエキゾーストチューブ
12へ流れ、ドライブシャフトハウジング4、ギヤケー
ス5(第4図参照)内を通り水中に排出される。また排
ガスは積層状のキャタリストエキゾーストプレート16
の間にそって流れるので、排ガスと触媒20との接触が
より多く行なわれ、浄化作用が良好確実に行なわれる。Therefore, the exhaust gas discharged from the exhaust port 22 of the cylinder 13 flows between the catalytic exhaust plates 16 as shown by the arrow in FIG.
C reacts with the catalyst 20 and is reburned and purified by the reaction heat. The purified exhaust gas flows to the exhaust tube 12, passes through the drive shaft housing 4 and the gear case 5 (see FIG. 4), and is discharged into the water. In addition, exhaust gas is handled by a laminated catalyst exhaust plate 16.
Since the exhaust gas flows along the gap between the exhaust gases and the catalyst 20, more contact is made between the exhaust gas and the catalyst 20, and the purifying action is performed well and reliably.
上記実施例では、船舶推進機として船外機の場合につい
て説明したが、船外機以外の推進機であっても適用可能
であることはいうまでもない。In the above embodiment, an outboard motor is used as the marine vessel propulsion device, but it goes without saying that the present invention is also applicable to propulsion devices other than outboard motors.
以上のようにこの発明によれば、排気マニホールド内に
表面に触媒を溶射したキャタリストエキゾーストプレー
トを層状に設けたので、このキャタリストエキゾースト
プレートにそって排ガスが流れる間にその触媒と排ガス
とが接触して排ガス中の有害成分が浄化される。またキ
ャタリストエキゾーストプレートが排気の案内路となっ
てスムーズに流れるので、排圧を高めることかなく、エ
ンジン出力を低下させることがない。そしてキャタリス
トエキゾーストプレートは排気ポートに近い排気マニホ
ールド内に配置されるので、排気温度の高い箇所であり
、そのため定常運転時(アイドリングから全開まで)は
もちろん、加速時や低速運転時であっても触媒の酸化反
応を推進させることができる。さらにキャタリストエキ
ゾーストプレートを設ける排気マニホールドは水か入り
にくい位置にあるので水(塩水)による触媒の損傷がな
く、触媒の耐久性、浄化性能の劣化がないと共に新規エ
ンジンのみならず既存のエンジンへの実施も容易にでき
、今後の船舶推進機全般の排気浄化に大きく寄与するこ
とができる。As described above, according to the present invention, the catalytic exhaust plate whose surface is thermally sprayed with a catalyst is provided in a layered manner in the exhaust manifold, so that while the exhaust gas flows along the catalytic exhaust plate, the catalyst and the exhaust gas are Harmful components in the exhaust gas are purified by contact. Additionally, the catalytic exhaust plate acts as a guide path for exhaust gas, allowing it to flow smoothly, without increasing exhaust pressure or reducing engine output. Since the catalytic exhaust plate is located in the exhaust manifold near the exhaust port, it is a location with high exhaust temperature, so not only during steady operation (from idling to full throttle), but also during acceleration and low speed operation. The oxidation reaction of the catalyst can be promoted. Furthermore, the exhaust manifold with the catalytic exhaust plate is located in a position where it is difficult for water to enter, so there is no damage to the catalyst due to water (salt water), and there is no deterioration in catalyst durability or purification performance, and it can be used not only in new engines but also in existing engines. It is also easy to implement and can greatly contribute to the purification of exhaust gas from marine propulsion systems in general in the future.
第1図はこの発明の一実施例を示す水平断面図、第2図
は第1図におけるキャタリストエキゾーストプレートの
一部を示す斜視図、第3図は第2図のA−A線断面図、
第4図はこの発明を適用する船舶用推進機の一例の船外
機を示す一部を断面とした側面図である。
10・・・エンジン、11・・・排気マニホールド、1
2・・・エキゾーストチューブ、13・・・シリンダ、
14・・・エキゾーストプレート、16・・・キャタリ
ストエキゾーストプレート、17・・・スペーサー、1
8・・・ボルト、20・・・触媒、22・・・排気ポー
ト。Fig. 1 is a horizontal sectional view showing an embodiment of the present invention, Fig. 2 is a perspective view showing a part of the catalytic exhaust plate in Fig. 1, and Fig. 3 is a sectional view taken along line A-A in Fig. 2. ,
FIG. 4 is a partially sectional side view showing an outboard motor as an example of a marine propulsion device to which the present invention is applied. 10...Engine, 11...Exhaust manifold, 1
2...Exhaust tube, 13...Cylinder,
14... Exhaust plate, 16... Catalyst exhaust plate, 17... Spacer, 1
8... Bolt, 20... Catalyst, 22... Exhaust port.
Claims (1)
トチューブを通じて水中に排出する排気系を有する船舶
用推進機において、表面に触媒を溶射したキャタリスト
エキゾーストプレートを排気マニホールド内に排気の流
れにそって層状に配設したことを特徴とする船舶用推進
機の排気浄化装置。In a marine propulsion system that has an exhaust system that discharges water into the water through an exhaust tube connected to the engine's exhaust manifold, a catalytic exhaust plate with a catalyst sprayed on its surface is arranged in layers along the flow of exhaust inside the exhaust manifold. An exhaust gas purification device for a marine propulsion unit characterized by the following.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2254200A JP2906623B2 (en) | 1990-09-26 | 1990-09-26 | Exhaust purification system for marine propulsion units |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2254200A JP2906623B2 (en) | 1990-09-26 | 1990-09-26 | Exhaust purification system for marine propulsion units |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04134117A true JPH04134117A (en) | 1992-05-08 |
JP2906623B2 JP2906623B2 (en) | 1999-06-21 |
Family
ID=17261643
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2254200A Expired - Lifetime JP2906623B2 (en) | 1990-09-26 | 1990-09-26 | Exhaust purification system for marine propulsion units |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2906623B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09109281A (en) * | 1995-10-18 | 1997-04-28 | Sumitomo Wiring Syst Ltd | Structure of molding |
US7017615B2 (en) | 2004-04-28 | 2006-03-28 | Sumitomo Wiring Systems, Ltd. | Protector |
US20160177805A1 (en) * | 2014-04-10 | 2016-06-23 | Suzuki Motor Corporation | Exhaust apparatus of outboard motor |
CN111170273A (en) * | 2020-03-03 | 2020-05-19 | 大连海事大学 | Combined cooling heating and power system and power supply method based on ammonia energy ship |
-
1990
- 1990-09-26 JP JP2254200A patent/JP2906623B2/en not_active Expired - Lifetime
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09109281A (en) * | 1995-10-18 | 1997-04-28 | Sumitomo Wiring Syst Ltd | Structure of molding |
US7017615B2 (en) | 2004-04-28 | 2006-03-28 | Sumitomo Wiring Systems, Ltd. | Protector |
US20160177805A1 (en) * | 2014-04-10 | 2016-06-23 | Suzuki Motor Corporation | Exhaust apparatus of outboard motor |
US10036299B2 (en) * | 2014-04-10 | 2018-07-31 | Suzuki Motor Corporation | Exhaust apparatus of outboard motor |
CN111170273A (en) * | 2020-03-03 | 2020-05-19 | 大连海事大学 | Combined cooling heating and power system and power supply method based on ammonia energy ship |
CN111170273B (en) * | 2020-03-03 | 2023-08-15 | 大连海事大学 | Combined cooling, heating and power supply system and power supply method based on ammonia energy ship |
Also Published As
Publication number | Publication date |
---|---|
JP2906623B2 (en) | 1999-06-21 |
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