JPH0544458A - Exhaust gas purifying device for outboard motor - Google Patents

Exhaust gas purifying device for outboard motor

Info

Publication number
JPH0544458A
JPH0544458A JP3206976A JP20697691A JPH0544458A JP H0544458 A JPH0544458 A JP H0544458A JP 3206976 A JP3206976 A JP 3206976A JP 20697691 A JP20697691 A JP 20697691A JP H0544458 A JPH0544458 A JP H0544458A
Authority
JP
Japan
Prior art keywords
exhaust gas
catalyst
exhaust
outboard motor
gas purifying
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
Application number
JP3206976A
Other languages
Japanese (ja)
Other versions
JP2961978B2 (en
Inventor
Masayoshi Takama
政善 高間
Makoto Kawai
眞 河合
Kenji Miyai
研二 宮井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzuki Motor Corp
Original Assignee
Suzuki Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suzuki Motor Corp filed Critical Suzuki Motor Corp
Priority to JP3206976A priority Critical patent/JP2961978B2/en
Publication of JPH0544458A publication Critical patent/JPH0544458A/en
Application granted granted Critical
Publication of JP2961978B2 publication Critical patent/JP2961978B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B61/00Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/04Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
    • F02B61/045Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for outboard marine engines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2590/00Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/02Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications
    • F01N2590/021Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications for outboard engines

Abstract

PURPOSE:To form an exhaust gas purifying device in a compact shape, to facilitate its installation, to improve exhaust gas purifying efficiency, and to increase its durability. CONSTITUTION:In an exhaust gas purifying device 18 for an outboard motor, the one side of a metallic plate 19 bent so as to have two sides forms a catalyst size 19a and the other side forms a fixing side 19b. A number of pores 21 are formed in the catalyst side 19a and catalyst carriers 24 containing a catalyst component are carried on the surface and the back. The fixing side 19b is fixed in an exhaust gas passage 15 located in the vicinity of an exhaust port 13, and one to a plurality of the catalyst sides 19a are arranged in a manner to extend in parallel to an exhaust gas flow (g) in an exhaust gas collecting chamber 15 and to stand up toward the exhaust port 13.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、船外機の排気浄化装置
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purification device for an outboard motor.

【0002】[0002]

【従来の技術】車両用の内燃機関では、排気ガス中に含
まれる未燃焼成分を再燃焼させて浄化し、大気中に放出
するため触媒を用いた排気浄化装置を設けるようにして
いる。自動車の内燃機関では、内燃機関の排気ポートに
連結する排気管の内部に、セラミックスで形成されたハ
ニカム状の担体に触媒成分を付着した触媒体を内蔵する
マフラを接続し、この触媒体の間を排気ガスが通ること
により酸化反応を起こさせて排気ガス中に含まれる未燃
焼成分を再燃焼させ、浄化させるようになっている。
オートバイ等の小型の内燃機関では、内燃機関の排気ポ
ートに連結される排気管の内面に、グラスウール等の媒
体に触媒成分を付着させた触媒体を内張りして押え片で
留め、排気管内を流れる排気ガスを触媒体に接触させて
未燃焼成分を再燃焼させ、浄化させるようになってい
る。
2. Description of the Related Art In an internal combustion engine for a vehicle, an exhaust purification device using a catalyst is provided for reburning unburned components contained in exhaust gas to purify and release them into the atmosphere. In an internal combustion engine of an automobile, a muffler containing a catalyst body having a catalyst component adhered to a honeycomb-shaped carrier made of ceramics is connected inside the exhaust pipe connected to the exhaust port of the internal combustion engine. When the exhaust gas passes through the exhaust gas, an oxidation reaction is caused to reburn the unburned components contained in the exhaust gas to purify the unburned components.
In a small internal combustion engine such as a motorcycle, the inner surface of the exhaust pipe connected to the exhaust port of the internal combustion engine is lined with a catalyst body in which a catalyst component is adhered to a medium such as glass wool, and is fastened with a pressing piece, and flows in the exhaust pipe. The exhaust gas is brought into contact with the catalyst body to reburn the unburned components to purify them.

【0003】[0003]

【発明が解決しようとする課題】しかしながら前記のよ
うにハニカム状の担体を用いた触媒体の場合、排気ガス
がハニカム状の多数の小孔を通るので流路面積が減少
し、抵抗が増大して機関の出力が低下し、特に小型の内
燃機関では出力低下によって受ける性能上の不利益が大
きい。またハニカム担体を用いた触媒体は体積が大き
く、重量が増大し、これに伴って排気管自体も大きな容
積となる。一方、排気管の内周面にグラスウール等より
なる触媒体を内張りしたものでは、その取付が煩雑であ
り、コストが高く、耐久性にも問題がある。
However, in the case of the catalyst body using the honeycomb-shaped carrier as described above, since the exhaust gas passes through a large number of honeycomb-shaped small holes, the flow passage area is reduced and the resistance is increased. As a result, the output of the engine is reduced, and especially in a small internal combustion engine, the performance disadvantage suffered by the reduction in output is great. Further, the catalyst body using the honeycomb carrier has a large volume and the weight thereof increases, and accordingly, the exhaust pipe itself has a large volume. On the other hand, in the case where a catalyst body made of glass wool or the like is lined on the inner peripheral surface of the exhaust pipe, its attachment is complicated, the cost is high, and the durability is also problematic.

【0004】船外機においても排気浄化対策を講ずるこ
とが望まれるが、船外機は内燃機関自体が小型であり、
かつその排気通路がドライブシャフトハウジング内の狭
いスペースに設けられるため、上記既存の自動車やオー
トバイ用の排気浄化装置を適用することができず、適用
し得たとしても前述の問題点が一層強く現われることに
なる。
Although it is desirable to take exhaust gas purification measures also in the outboard motor, the internal combustion engine itself of the outboard motor is small,
Moreover, since the exhaust passage is provided in a narrow space inside the drive shaft housing, the existing exhaust gas purifying device for automobiles and motorcycles cannot be applied, and even if it is applicable, the above-mentioned problems are more strongly manifested. It will be.

【0005】本発明は上記問題を考慮してなされたもの
で、コンパクトで設置が容易であり、排気浄化効率が良
好であると同時に高い耐久性を備えた船外機の排気浄化
装置を提供することを目的とする。
The present invention has been made in consideration of the above problems, and provides an outboard motor exhaust gas purification device that is compact and easy to install, has good exhaust gas purification efficiency, and at the same time has high durability. The purpose is to

【0006】[0006]

【課題を解決するための手段】上記目的を達成するた
め、本発明に係る船外機の排気浄化装置は、内燃機関の
排気通路に触媒体が設けられた船外機の排気浄化装置に
おいて、2つの辺を有するように折曲された金属プレー
トの1辺を触媒辺、他辺を固定辺とし、触媒辺には多数
の小孔を設けるとともに、その表裏に触媒成分を担持さ
せ、固定辺を排気ポート近傍の排気通路内部に固定し、
1〜数枚の触媒辺が排気通路内部の排気ガス流に平行
に、かつ排気ポートに向かって起立するように配置した
ものである。
In order to achieve the above object, an exhaust gas purification apparatus for an outboard motor according to the present invention is an exhaust gas purification apparatus for an outboard motor in which a catalyst is provided in an exhaust passage of an internal combustion engine. A metal plate bent so as to have two sides has one side as a catalyst side and the other side as a fixed side. A large number of small holes are provided on the catalyst side, and a catalyst component is supported on the front and back sides of the metal plate. Fixed inside the exhaust passage near the exhaust port,
One to several catalyst sides are arranged parallel to the exhaust gas flow inside the exhaust passage and standing upright toward the exhaust port.

【0007】[0007]

【作用】このように構成することによって触媒体の体積
が小さくなり、排気浄化装置が非常にコンパクト化され
るとともに、排気通路内部への取付が容易になる。
With this structure, the volume of the catalyst body is reduced, the exhaust gas purification device is made very compact, and the exhaust gas purification device is easily mounted inside the exhaust passage.

【0008】そして内燃機関の排気ポートから出る排気
ガスは、排気ポートに向かって起立している触媒辺の表
裏にくまなく接触するため、排気ガス中の未燃焼成分が
触媒辺の表裏に担持された触媒成分に充分に接触し、酸
化反応するので、排気ガスが効率良く浄化される。
Exhaust gas emitted from the exhaust port of the internal combustion engine contacts the front and back sides of the catalyst side standing upright toward the exhaust port, so that unburned components in the exhaust gas are carried on the front and back sides of the catalyst side. The exhaust gas is efficiently purified because it sufficiently contacts the catalyst component and undergoes an oxidation reaction.

【0009】また、触媒体が金属プレートにより形成さ
れるため、高い耐久性が付与される。
Further, since the catalyst body is formed of a metal plate, high durability is imparted.

【0010】[0010]

【実施例】以下、この発明の一実施例を図面に基づいて
説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

【0011】船外機1は、図1に縦断面を、図2に平断
面を示すように、ドライブシャフトハウジング2の上部
にエンジンカバー3で覆われた内燃機関4(図は2スト
ローク2気筒機関の場合を示す)が搭載される。この内
燃機関4のシリンダ5内を摺動するピストン6の往復運
動は、コンロッド7によってクランクシャフト8の回転
運動に変換され、クランクシャフト8の回転はドライブ
シャフト9を通じてプロペラシャフト11に伝えられ、
プロペラ12を駆動して推力が生じるようになってい
る。
The outboard motor 1 has an internal combustion engine 4 (a two-stroke two-cylinder cylinder) covered with an engine cover 3 on an upper portion of a drive shaft housing 2 as shown in a vertical cross section in FIG. It shows the case of the engine). The reciprocating motion of the piston 6 sliding in the cylinder 5 of the internal combustion engine 4 is converted into the rotational motion of the crankshaft 8 by the connecting rod 7, and the rotation of the crankshaft 8 is transmitted to the propeller shaft 11 through the drive shaft 9.
The propeller 12 is driven to generate thrust.

【0012】内燃機関4の排気通路は、シリンダ5の排
気ポート13を覆うエキゾーストカバー14が形成する
排気集合室15と、この排気集合室15に接続され、下
方に延びる排気管16と、ドライブシャフトハウジング
2の内部に形成された排気膨張室17とから構成され
る。排気管16は、排気膨張室17内で下向きに開口
し、排気膨張室17は下方に延びてプロペラシャフト1
1に沿い、水中に開口してる。
The exhaust passage of the internal combustion engine 4 has an exhaust collecting chamber 15 formed by an exhaust cover 14 covering the exhaust port 13 of the cylinder 5, an exhaust pipe 16 connected to the exhaust collecting chamber 15 and extending downward, and a drive shaft. It is composed of an exhaust expansion chamber 17 formed inside the housing 2. The exhaust pipe 16 opens downward in the exhaust expansion chamber 17, and the exhaust expansion chamber 17 extends downward so that the propeller shaft 1
Along 1 there is an opening in the water.

【0013】このため、シリンダ5から排気ポート13
を通って排気集合室15に流出した排気ガスは、後述す
る排気浄化装置18によって未燃焼成分を浄化された
後、排気管16を通って排気膨張室17に抜け、膨張し
て水中に排出される。
Therefore, from the cylinder 5 to the exhaust port 13
The exhaust gas that has flowed through the exhaust gas collection chamber 15 is purified of unburned components by an exhaust purification device 18, which will be described later, and then passes through the exhaust pipe 16 into the exhaust expansion chamber 17 where it is expanded and discharged into water. It

【0014】図3は、図2のIII 部の拡大図であり、図
4は図2のIV−IV線に沿う断面図である。
FIG. 3 is an enlarged view of the III portion of FIG. 2, and FIG. 4 is a sectional view taken along the line IV-IV of FIG.

【0015】本発明に係る船外機の排気浄化装置18
は、排気ポート13近傍の排気通路である上記排気集合
室15の内部に設置され、触媒体となる1〜数枚の金属
プレート19から構成される。
Exhaust gas exhaust purification system 18 according to the present invention
Is installed inside the exhaust collecting chamber 15, which is an exhaust passage near the exhaust port 13, and is composed of one to several metal plates 19 that serve as catalysts.

【0016】この金属プレート19は、2つの辺を有す
るように折曲され、1辺が触媒辺19a、他辺が固定辺
19bとされている。触媒辺19aは固定辺19bより
幅広とされ、多数の小孔21が設けられるとともに、そ
の表裏には図5(a)に示すように、無毒性の金属、セ
ラミックス、あるいはサーメット等を溶射して表面に細
かい凹凸のある担持層22を形成し、この担持層22の
表面に、触媒成分を含んだ触媒溶液23と触媒担体24
とからなるスラリー25を塗布等により付着させ、これ
を乾燥焼成して図5(b)の如く触媒成分を含んだ触媒
担体24を担持層22の表面に固着させている。
The metal plate 19 is bent to have two sides, one side being a catalyst side 19a and the other side being a fixed side 19b. The catalyst side 19a is wider than the fixed side 19b and is provided with a large number of small holes 21. As shown in FIG. 5 (a), non-toxic metal, ceramics, cermet or the like is sprayed on the front and back sides thereof. A carrier layer 22 having fine irregularities is formed on the surface, and a catalyst solution 23 containing a catalyst component and a catalyst carrier 24 are formed on the surface of the carrier layer 22.
A slurry 25 composed of and is adhered by coating or the like, and this is dried and baked to fix the catalyst carrier 24 containing the catalyst component to the surface of the carrier layer 22 as shown in FIG. 5B.

【0017】金属プレート19の固定辺19bは、例え
ばエキゾーストカバー14の内側にリベット26、もし
くは溶着等によって固定され、1〜数枚(本実施例では
3枚)の触媒辺19aが、排気集合室15内部の排気ガ
ス流gに平行に、かつ排気ポート13に向かって起立す
るように配置されている。
The fixed side 19b of the metal plate 19 is fixed to the inside of the exhaust cover 14 by a rivet 26 or by welding, for example, and one to several (three in this embodiment) catalyst sides 19a are connected to the exhaust collecting chamber. It is arranged parallel to the exhaust gas flow g inside 15 and standing upright toward the exhaust port 13.

【0018】このとき固定辺19bは、図3に示すよう
に隣り合う金属プレート19に当接するスペーサとして
の役割を果すため、触媒辺19a間に一定の間隔を持た
せることが容易となる。
At this time, the fixed side 19b serves as a spacer that abuts the adjacent metal plates 19 as shown in FIG. 3, so that it becomes easy to provide a constant space between the catalyst sides 19a.

【0019】なお、触媒辺19aに設ける小孔21は、
固定辺19b側に設けられていても支障ないため、金属
プレート19にはパンチングプレートなどをそのまま用
いることができる。
The small holes 21 provided on the catalyst side 19a are
Even if the metal plate 19 is provided on the fixed side 19b side, there is no problem, so that a punching plate or the like can be used as the metal plate 19 as it is.

【0020】図6(A)〜(M)は金属プレート19の
形状例を示すもので、図6(A)は基本形で触媒辺19
aを固定辺19bよりも幅広としたL形状のものであ
り、図6(B)〜(E)は触媒辺19aに対し固定辺1
9bの角度を非直角としたもの、および触媒辺19aを
非平坦面としてものである。また図6(F),(G)は
触媒辺19aの長手方向中央で折目27を付けたもので
あり、図6(H)〜(K)は折目27を境とする2つの
面の形状の変形例を示している。さらに図6(L),
(M)は触媒辺19aをジグザグ状、波状とした例であ
る。このように触媒辺19aの角度や折目の付け方は任
意に選択することができる。
FIGS. 6A to 6M show examples of the shape of the metal plate 19, and FIG. 6A shows the basic shape of the catalyst side 19.
6A to 6E has a fixed side 1 with respect to the catalyst side 19a.
9b has a non-perpendicular angle, and the catalyst side 19a has a non-flat surface. 6 (F) and 6 (G) show a fold 27 at the center of the catalyst side 19a in the longitudinal direction, and FIGS. 6 (H) to 6 (K) show two faces with the fold 27 as a boundary. The modification of a shape is shown. Further, FIG. 6 (L),
(M) is an example in which the catalyst side 19a has a zigzag shape and a wavy shape. In this way, the angle of the catalyst side 19a and the method of making the fold can be arbitrarily selected.

【0021】このように排気浄化装置18は、触媒成分
を表裏に固着させた触媒辺19aを、排気集合室15内
部の排気ガス流に平行に、かつ排気ポート13に向って
起立するように配置しているので、シリンダ5の排気ポ
ート13から出た排気ガスは、その流れを妨げられるこ
となく触媒辺19aの表裏全面にくまなく接触し、排気
ガス中の未燃焼成分が充分に触媒成分に触れて酸化反応
するので、排気ガスが効率良く浄化される。
As described above, the exhaust gas purification device 18 is arranged so that the catalyst sides 19a having the catalyst components fixed to the front and back sides are erected parallel to the exhaust gas flow inside the exhaust gas collecting chamber 15 and toward the exhaust port 13. Therefore, the exhaust gas emitted from the exhaust port 13 of the cylinder 5 contacts the entire front and back surfaces of the catalyst side 19a without hindering the flow of the exhaust gas, and the unburned components in the exhaust gas become sufficient catalyst components. Exhaust gas is efficiently purified because it touches and undergoes an oxidation reaction.

【0022】また排気浄化装置18は、触媒体の体積が
小さく、非常にコンパクトに構成されるため、排気集合
室15の内部スペースに余裕を持って収容させることが
可能であると同時に、その設置が簡単に行なえ、しかも
触媒体が金属プレートよりなるため、高い耐久性を持
つ。
Further, since the exhaust purifying device 18 has a catalyst body having a small volume and is extremely compact, the exhaust purifying device 18 can be accommodated in the internal space of the exhaust gas collecting chamber 15 with a sufficient space, and at the same time, it can be installed. It has a high durability because the catalyst body is made of a metal plate.

【0023】[0023]

【発明の効果】以上説明したように、本発明に係る船外
機の排気浄化装置は、内燃機関の排気通路に触媒体が設
けられた船外機の排気浄化装置において、2つの辺を有
するように折曲された金属プレートの1辺を触媒辺、他
辺を固定辺とし、触媒辺には多数の小孔を設けるととも
に、その表裏に触媒成分を担持させ、固定辺を排気ポー
ト近傍の排気通路内部に固定し、1〜数枚の触媒辺が排
気通路内部の排気ガス流に平行に、かつ排気ポートに向
かって起立するように配置したものである。
As described above, the exhaust gas purification apparatus for an outboard motor according to the present invention has two sides in the exhaust gas purification apparatus for an outboard motor in which the catalyst is provided in the exhaust passage of the internal combustion engine. One side of the bent metal plate is the catalyst side, the other side is the fixed side, a large number of small holes are provided on the catalyst side, and the catalyst component is loaded on the front and back sides, and the fixed side is near the exhaust port. It is fixed inside the exhaust passage and is arranged so that one or several catalyst sides stand parallel to the exhaust gas flow inside the exhaust passage and toward the exhaust port.

【0024】したがって、内燃機関の排気ポートから出
た排気ガスは、その流れを妨げられることなく触媒辺の
表裏全面にくまなく接触し、排気ガス中の未燃焼成分が
酸化反応して排気ガスが効率良く浄化される。
Therefore, the exhaust gas emitted from the exhaust port of the internal combustion engine contacts the entire front and back surfaces of the catalyst side without obstructing the flow of the exhaust gas, and the unburned components in the exhaust gas undergo oxidation reaction to generate exhaust gas. It is efficiently purified.

【0025】また、触媒体の体積が小さくなり、排気浄
化装置を非常にコンパクトに構成できるため、船外機の
排気通路のように内部容積が小さい場合でも問題なく収
容させることが可能であると同時に、その設置を極く簡
単に行なうことができ、しかも触媒体が金属プレートよ
りなるため、高い耐久性を備えている。
Further, since the volume of the catalyst is small and the exhaust gas purifying device can be made very compact, it can be accommodated without any problem even when the internal volume is small such as the exhaust passage of the outboard motor. At the same time, it can be installed extremely easily, and since the catalyst body is made of a metal plate, it has high durability.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明を適用する船外機の縦断面図。FIG. 1 is a vertical sectional view of an outboard motor to which the present invention is applied.

【図2】図1のII−II線に沿う断面図。FIG. 2 is a sectional view taken along line II-II in FIG.

【図3】図2のIII 部拡大図。FIG. 3 is an enlarged view of a part III in FIG.

【図4】図2のIV−IV線に沿う断面図。FIG. 4 is a sectional view taken along line IV-IV in FIG.

【図5】(A)は担持層のスラリーを塗布した状態を示
す触媒辺の断面図、(B)はスラリーを乾燥焼成した後
の状態を示す触媒辺の断面図。
5A is a cross-sectional view of the catalyst side showing a state in which a slurry of a carrier layer is applied, and FIG. 5B is a cross-sectional view of the catalyst side showing a state after the slurry is dried and calcined.

【図6】(A)〜(M)は、それぞれ金属プレートの各
形状例を示す斜視図。
6A to 6M are perspective views showing examples of respective shapes of metal plates.

【符号の説明】[Explanation of symbols]

1 船外機 2 ドライブシャフトハウジング 4 内燃機関 5 シリンダ 13 排気ポート 14 エキゾーストカバー 15 排気集合室 16 排気管 18 排気浄化装置 19 金属プレート 19a 触媒辺 19b 固定辺 21 小孔 24 触媒担体 26 リベット g 排気ガス流 1 Outboard Motor 2 Drive Shaft Housing 4 Internal Combustion Engine 5 Cylinder 13 Exhaust Port 14 Exhaust Cover 15 Exhaust Collecting Chamber 16 Exhaust Pipe 18 Exhaust Purifier 19 Metal Plate 19a Catalyst Side 19b Fixed Side 21 Small Hole 24 Catalyst Carrier 26 Rivet g Exhaust Gas Flow

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 F01N 3/28 Z 9150−3G ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location F01N 3/28 Z 9150-3G

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 内燃機関の排気通路に触媒体が設けられ
た船外機の排気浄化装置において、2つの辺を有するよ
うに折曲された金属プレートの1辺を触媒辺、他辺を固
定辺とし、触媒辺には多数の小孔を設けるとともに、そ
の表裏に触媒成分を担持させ、固定辺を排気ポート近傍
の排気通路内部に固定し、1〜数枚の触媒辺が排気通路
内部の排気ガス流に平行に、かつ排気ポートに向かって
起立するように配置したことを特徴とする船外機の排気
浄化装置。
1. In an exhaust gas purification apparatus for an outboard motor, wherein a catalyst is provided in an exhaust passage of an internal combustion engine, one side of a metal plate bent so as to have two sides is fixed to a catalyst side and the other side is fixed. The catalyst side is provided with a large number of small holes, the catalyst components are supported on the front and back sides, and the fixed side is fixed inside the exhaust passage near the exhaust port. An outboard engine exhaust gas purification device, which is arranged parallel to the exhaust gas flow and upright toward the exhaust port.
JP3206976A 1991-08-19 1991-08-19 Outboard exhaust purification system Expired - Lifetime JP2961978B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3206976A JP2961978B2 (en) 1991-08-19 1991-08-19 Outboard exhaust purification system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3206976A JP2961978B2 (en) 1991-08-19 1991-08-19 Outboard exhaust purification system

Publications (2)

Publication Number Publication Date
JPH0544458A true JPH0544458A (en) 1993-02-23
JP2961978B2 JP2961978B2 (en) 1999-10-12

Family

ID=16532117

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3206976A Expired - Lifetime JP2961978B2 (en) 1991-08-19 1991-08-19 Outboard exhaust purification system

Country Status (1)

Country Link
JP (1) JP2961978B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109505808A (en) * 2018-12-25 2019-03-22 广东美的白色家电技术创新中心有限公司 Fans silencer and fan noise elimination system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109505808A (en) * 2018-12-25 2019-03-22 广东美的白色家电技术创新中心有限公司 Fans silencer and fan noise elimination system
CN109505808B (en) * 2018-12-25 2024-02-20 广东美的白色家电技术创新中心有限公司 Fan silencer and fan silencing system

Also Published As

Publication number Publication date
JP2961978B2 (en) 1999-10-12

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