JPH08246859A - Catalyst installing structure for motorcycle - Google Patents
Catalyst installing structure for motorcycleInfo
- Publication number
- JPH08246859A JPH08246859A JP4885795A JP4885795A JPH08246859A JP H08246859 A JPH08246859 A JP H08246859A JP 4885795 A JP4885795 A JP 4885795A JP 4885795 A JP4885795 A JP 4885795A JP H08246859 A JPH08246859 A JP H08246859A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- muffler
- exhaust pipe
- engine
- exhaust
- 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.)
- Pending
Links
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
- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
- F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers in a single housing
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は自動二輪車の触媒取付構
造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catalyst mounting structure for a motorcycle.
【０００２】[0002]
【従来の技術】ガソリンエンジン等の内燃機関から排出
される排気ガスには一酸化炭素（ＣＯ）や炭化水素（Ｈ
Ｃ）、窒素酸化物（ＮＯｘ）等の有害成分が含まれてい
る。これらの有害成分を無害化するための排気ガスの排
気浄化装置は、考え方から二つに大別される。Exhaust gas discharged from an internal combustion engine such as a gasoline engine contains carbon monoxide (CO) and hydrocarbons (H).
C), nitrogen oxides (NOx) and other harmful components are included. Exhaust gas exhaust emission control devices for making these harmful components harmless are roughly classified into two.
【０００３】一つは、エンジンの燃焼室内で燃料の完全
燃焼を図り、有害成分の生成を防止するものである。他
の一つは、エンジンの燃焼室から排出される排気ガス中
には有害成分が含まれていても、大気に放出される前に
無害化しようとするものである。One is to achieve complete combustion of the fuel in the combustion chamber of the engine and prevent the production of harmful components. In the other, even if harmful components are contained in the exhaust gas discharged from the combustion chamber of the engine, they are intended to be rendered harmless before being discharged to the atmosphere.
【０００４】後者の排気ガスを浄化する手段として、排
気装置の中に白金、ロジウムおよびパラジウムからなる
触媒を設けて、この触媒にエンジンの燃焼室から排出さ
れた排気ガスを接触させて、化学反応により排気ガスの
酸化を促進して前記有害物質を二酸化炭素（ＣＯ２）や
水（Ｈ２Ｏ）、窒素（Ｎ２）等に変化させて無害化して
いるものがある。As a means for purifying the latter exhaust gas, a catalyst composed of platinum, rhodium and palladium is provided in the exhaust device, and the exhaust gas discharged from the combustion chamber of the engine is brought into contact with this catalyst to carry out a chemical reaction. In some cases, the harmful substances are converted into carbon dioxide (CO 2 ), water (H 2 O), nitrogen (N 2 ), etc. to render them harmless.
【０００５】例えば、自動二輪車に用いられる排気浄化
装置は、図４（ａ）に示すように、エンジン排気装置１
の一部であるマフラ２の中に配置されたエキゾーストパ
イプ３の末端開口部３ａに触媒４を直接溶着して取付
け、この触媒４に排気ガスを通過させることにより排気
ガスの浄化を行うようになっている。For example, as shown in FIG. 4 (a), an exhaust gas purification device used in a motorcycle has an engine exhaust device 1
A catalyst 4 is directly attached to the end opening 3a of the exhaust pipe 3 arranged in the muffler 2 which is a part of the exhaust gas, and the exhaust gas is passed through the catalyst 4 to purify the exhaust gas. Has become.
【０００６】触媒の他の取付け例としては、図４（ｂ）
に示すように、触媒４をマフラ２内壁にステー５を介し
て固定したものや、図４（ｃ）に示すように、触媒４を
マフラ２内を区画するバッフルプレート６で保持したも
のがある。Another example of mounting the catalyst is shown in FIG.
As shown in FIG. 4, there are those in which the catalyst 4 is fixed to the inner wall of the muffler 2 via stays 5, and those in which the catalyst 4 is held by a baffle plate 6 that partitions the muffler 2 as shown in FIG. .
【０００７】[0007]
【発明が解決しようとする課題】触媒は常に高温に晒さ
れているため、時間経過と共に劣化し、排気ガスの浄化
能力が低下する。しかしながら、上述した従来の触媒の
取付構造においては、触媒のみの交換は不可能であり、
エンジン排気装置全体の交換が必要となってコストがか
かってしまう。Since the catalyst is constantly exposed to high temperatures, it deteriorates over time, and the exhaust gas purification capability decreases. However, in the conventional catalyst mounting structure described above, it is impossible to replace only the catalyst,
The entire engine exhaust system needs to be replaced, which increases costs.
【０００８】本発明は上述した事情を考慮してなされた
もので、触媒単体を容易に交換可能な自動二輪車の触媒
取付構造を提供することを目的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a catalyst mounting structure for a motorcycle in which a single catalyst can be easily replaced.
【０００９】[0009]
【課題を解決するための手段】本発明に係る自動二輪車
の触媒取付構造は、上述した課題を解決するために、請
求項１に記載したように、エンジンの下流側に接続され
るエキゾーストパイプと、このエキゾーストパイプの下
流側に接続されるマフラとから構成された自動二輪車の
エンジン排気装置において、上記エキゾーストパイプは
その末端開口部が上記マフラ内に配置され、上記エキゾ
ーストパイプの末端開口部近傍の上記マフラ壁に交換穴
を形成すると共に、この交換穴に蓋体をボルト等で着脱
自在に取付け、上記蓋体の内表面に排気ガスの浄化を行
う触媒を一体的に取付けたものである。In order to solve the above-mentioned problems, a catalyst mounting structure for a motorcycle according to the present invention has an exhaust pipe connected to a downstream side of an engine as described in claim 1. , In a motorcycle engine exhaust system configured with a muffler connected to the downstream side of the exhaust pipe, the exhaust pipe has an end opening located in the muffler, and the exhaust pipe in the vicinity of the end opening of the exhaust pipe. An exchange hole is formed in the muffler wall, a lid is detachably attached to the exchange hole with a bolt or the like, and a catalyst for purifying exhaust gas is integrally attached to the inner surface of the lid.
【００１０】[0010]
【作用】上記の構成を有する本発明においては、エンジ
ンの下流側に接続されるエキゾーストパイプと、このエ
キゾーストパイプの下流側に接続されるマフラとから構
成された自動二輪車のエンジン排気装置の上記エキゾー
ストパイプはその末端開口部が上記マフラ内に配置さ
れ、上記エキゾーストパイプの末端開口部近傍の上記マ
フラ壁に交換穴を形成すると共に、この交換穴に蓋体を
ボルト等で着脱自在に取付け、上記蓋体の内表面に排気
ガスの浄化を行う触媒を一体的に取付けたため、従来の
ように排気装置全体を交換することなく、触媒のみの交
換が容易に行える。In the present invention having the above-mentioned structure, the above-mentioned exhaust of the engine exhaust system for a motorcycle comprising the exhaust pipe connected to the downstream side of the engine and the muffler connected to the downstream side of the exhaust pipe. The pipe has an end opening arranged in the muffler, an exchange hole is formed in the muffler wall near the end opening of the exhaust pipe, and a lid is detachably attached to the exchange hole with a bolt or the like. Since the catalyst for purifying the exhaust gas is integrally attached to the inner surface of the lid, only the catalyst can be easily replaced without replacing the entire exhaust device as in the conventional case.
【００１１】[0011]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１２】図１は、この発明を適用したスクータ型自
動二輪車の一例を示す右側面図である。図１に示すよう
に、このスクータ型自動二輪車１１は車体フレーム１２
を有し、この車体フレーム１２の前端にはヘッドパイプ
１３が設けられる。このヘッドパイプ１３には前輪１４
を回動自在に支持するフロントフォーク１５やハンドル
バー１６等が設けられ、このハンドルバー１６により前
輪１４が左右に回動自在に操舵される。FIG. 1 is a right side view showing an example of a scooter type motorcycle to which the present invention is applied. As shown in FIG. 1, this scooter type motorcycle 11 has a body frame 12
A head pipe 13 is provided at the front end of the vehicle body frame 12. This head pipe 13 has a front wheel 14
A front fork 15 and a handle bar 16 that rotatably support the vehicle are provided, and the front wheel 14 is steered by the handle bar 16 to be rotatable left and right.
【００１３】車体フレーム１２の後上方には図示しない
ヘルメット等を収納可能な物品収納室１７が設けられ、
物品収納室１７の上方に運転シート１８が開閉自在に設
置される。そして、車体フレーム１２は車体カバー１９
により覆われる。An article storage chamber 17 for accommodating a helmet or the like (not shown) is provided above and rearward of the body frame 12.
A driving seat 18 is installed above the article storage chamber 17 so as to be openable and closable. The vehicle body frame 12 is provided with a vehicle body cover 19
Covered by
【００１４】車体フレーム１２の中央下部には左右一対
のステー２０が設けられ、このステー２０間に架設され
たピボット軸２１にパワーユニット２２の前部がリンク
２３を介してスイング自在に枢着される。このパワーユ
ニット２２は略水平に配置されたエンジン２４と、この
エンジン２４の一側から後方に延びる伝導ケース２５と
を備える。この伝導ケース２５はスイングアームを兼ね
ており、リヤショックアブソーバ２６により車体フレー
ム１２に弾性的に支持される。そして、伝導ケース２５
の後端に駆動輪である後輪２７が保持される。A pair of left and right stays 20 are provided in the lower center of the vehicle body frame 12, and a front portion of a power unit 22 is pivotally attached via a link 23 to a pivot shaft 21 provided between the stays 20. . The power unit 22 includes an engine 24 arranged substantially horizontally and a conduction case 25 extending rearward from one side of the engine 24. The conductive case 25 also serves as a swing arm, and is elastically supported by the vehicle body frame 12 by a rear shock absorber 26. And the conductive case 25
A rear wheel 27, which is a drive wheel, is held at the rear end of the rear wheel.
【００１５】エンジン２４の上流側には図示しないキャ
ブレタおよびエアクリーナから構成されるエンジン吸気
装置が設けられる一方、エンジン２４の下流側にはエン
ジン排気装置２８が設けられる。このエンジン排気装置
２８はブラケット２９を介してパワーユニット２２に取
り付けられ、パワーユニット２２と一体的にスイングす
る。An engine intake device composed of a carburetor and an air cleaner (not shown) is provided on the upstream side of the engine 24, while an engine exhaust device 28 is provided on the downstream side of the engine 24. The engine exhaust device 28 is attached to the power unit 22 via a bracket 29 and swings integrally with the power unit 22.
【００１６】図２は、エンジン排気装置２８の縦断面図
である。図２に示すように、この排気装置２８はエンジ
ン２４に接続されるエキゾーストパイプ３０と、このエ
キゾーストパイプ３０の下流側に接続されるマフラ３１
とから構成される。また、エキゾーストパイプ３０の末
端開口部３０ａはマフラ３１内に配置される。マフラ３
１内にはバッフルプレー３２が設けられ、マフラ３１内
を上流側の膨張室３１ａと下流側の消音室３１ｂとに区
画する。膨張室３１ａと消音室３１ｂとはバッフルパイ
プ３３で連通されると共に、消音室３１ｂと大気中とは
排気パイプ３４で連通される。FIG. 2 is a vertical sectional view of the engine exhaust device 28. As shown in FIG. 2, the exhaust device 28 includes an exhaust pipe 30 connected to the engine 24 and a muffler 31 connected downstream of the exhaust pipe 30.
Composed of and. Further, the end opening 30 a of the exhaust pipe 30 is arranged inside the muffler 31. Muffler 3
A baffle play 32 is provided in the inside of the muffler 1, and divides the muffler 31 into an expansion chamber 31a on the upstream side and a muffling chamber 31b on the downstream side. The expansion chamber 31a and the muffling chamber 31b are connected by a baffle pipe 33, and the muffling chamber 31b and the atmosphere are connected by an exhaust pipe 34.
【００１７】図３は、図２のIII −III 線に沿う断面図
である。図２および図３に示すように、エキゾーストパ
イプ３０の末端開口部３０ａ近傍のマフラ３１壁には交
換穴３５が形成され、この交換穴３５は蓋体であるカバ
ープレート３６により塞がれる。カバープレート３６は
ガスケット３７を介在させてマフラ３１壁の交換穴３５
にボルト３８等で着脱自在に取付けられる。FIG. 3 is a sectional view taken along the line III-III in FIG. As shown in FIGS. 2 and 3, an exchange hole 35 is formed in the wall of the muffler 31 near the end opening 30a of the exhaust pipe 30, and the exchange hole 35 is closed by a cover plate 36 which is a lid. The cover plate 36 includes a gasket 37, and an exchange hole 35 in the wall of the muffler 31.
It is removably attached with a bolt 38 or the like.
【００１８】カバープレート３６の内表面３６ａにはス
テー３９を介して排気ガスの浄化を行う触媒４０が取り
付けられる。この触媒４０は、エキゾーストパイプ３０
の末端開口部３０ａ直後に配置されるのが望ましい。ま
た、前記マフラ３１壁の交換穴３５は触媒４０が出し入
れ可能な大きさに開口されるように配慮される。A catalyst 40 for purifying exhaust gas is attached to the inner surface 36a of the cover plate 36 via a stay 39. This catalyst 40 is used for the exhaust pipe 30.
It is desirable to be placed immediately after the end opening 30a of the. Also, the exchange hole 35 in the wall of the muffler 31 is designed to be opened to a size allowing the catalyst 40 to be taken in and out.
【００１９】次に、本実施例の作用について説明する。Next, the operation of this embodiment will be described.
【００２０】触媒４０を、マフラ３１壁の交換穴３５を
覆うカバープレート３６と一体にし、このカバープレー
ト３６をマフラ３１に着脱自在に構成することにより、
触媒４０が時間経過と共に劣化し、排気ガスの浄化能力
が低下しても従来のように排気装置２８全体を交換する
ことなく、触媒４０のみの交換が容易に行える。また、
触媒４０が劣化していなくても、異なる規格の触媒との
交換にも容易に対応できる。そして、上述した実施例に
よれば触媒４０の交換を排気装置２８をエンジン２４か
ら取り外すことなく実施可能である。The catalyst 40 is integrated with the cover plate 36 that covers the exchange hole 35 in the wall of the muffler 31, and the cover plate 36 is detachably attached to the muffler 31.
Even if the catalyst 40 deteriorates with the passage of time and the exhaust gas purification capability decreases, it is possible to easily replace only the catalyst 40 without replacing the entire exhaust device 28 as in the conventional case. Also,
Even if the catalyst 40 is not deteriorated, it can be easily replaced with a catalyst of a different standard. Further, according to the above-described embodiment, the replacement of the catalyst 40 can be performed without removing the exhaust device 28 from the engine 24.
【００２１】[0021]
【発明の効果】以上説明したように、本発明に係る自動
二輪車の触媒取付構造によれば、エンジンの下流側に接
続されるエキゾーストパイプと、このエキゾーストパイ
プの下流側に接続されるマフラとから構成された自動二
輪車のエンジン排気装置において、上記エキゾーストパ
イプはその末端開口部が上記マフラ内に配置され、上記
エキゾーストパイプの末端開口部近傍の上記マフラ壁に
交換穴を形成すると共に、この交換穴に蓋体をボルト等
で着脱自在に取付け、上記蓋体の内表面に排気ガスの浄
化を行う触媒を一体的に取付けたため、従来のように排
気装置全体を交換することなく、触媒のみの交換が容易
に行える。As described above, according to the catalyst mounting structure for a motorcycle according to the present invention, the exhaust pipe connected to the downstream side of the engine and the muffler connected to the downstream side of the exhaust pipe. In the motorcycle engine exhaust system configured, the exhaust pipe has an end opening located in the muffler, and an exchange hole is formed in the muffler wall in the vicinity of the end opening of the exhaust pipe. Since the lid is removably attached with bolts and the like, and the catalyst for purifying the exhaust gas is integrally attached to the inner surface of the lid, only the catalyst can be replaced without replacing the entire exhaust system as in the past. Can be done easily.
【図１】本発明に係る自動二輪車の触媒取付構造の一実
施例を示すスクータ型自動二輪車の右側面図。FIG. 1 is a right side view of a scooter type motorcycle showing an embodiment of a catalyst mounting structure for a motorcycle according to the present invention.
【図２】エンジン排気装置の縦断面図。FIG. 2 is a vertical sectional view of an engine exhaust system.
【図３】図２のIII −III 線に沿う断面図。FIG. 3 is a sectional view taken along the line III-III in FIG.
【図４】（ａ）、（ｂ）および（ｃ）は、それぞれ従来
の触媒の取付例を示すエンジン排気装置の縦断面図。4 (a), (b) and (c) are vertical cross-sectional views of an engine exhaust system showing an example of mounting a conventional catalyst.
１１ 自動二輪車 ２２ パワーユニット ２４ エンジン ２８ エンジン排気装置 ３０ エキゾーストパイプ ３０ａ エキゾーストパイプの末端開口部 ３１ マフラ ３５ 交換穴 ３６ カバープレート（蓋体） ３６ａ カバープレートの内表面 ３８ ボルト ４０ 触媒 11 Motorcycle 22 Power Unit 24 Engine 28 Engine Exhaust Device 30 Exhaust Pipe 30a Exhaust Pipe End Opening 31 Muffler 35 Replacement Hole 36 Cover Plate (Lid) 36a Inner Surface of Cover Plate 38 Bolt 40 Catalyst
Claims (1)
ストパイプと、このエキゾーストパイプの下流側に接続
されるマフラとから構成された自動二輪車のエンジン排
気装置において、上記エキゾーストパイプはその末端開
口部が上記マフラ内に配置され、上記エキゾーストパイ
プの末端開口部近傍の上記マフラ壁に交換穴を形成する
と共に、この交換穴に蓋体をボルト等で着脱自在に取付
け、上記蓋体の内表面に排気ガスの浄化を行う触媒を一
体的に取付けたことを特徴とする自動二輪車の触媒取付
構造。1. An engine exhaust system for a motorcycle comprising an exhaust pipe connected to a downstream side of an engine and a muffler connected to a downstream side of the exhaust pipe, wherein the exhaust pipe has an end opening portion. An exchange hole is formed in the muffler wall located in the muffler near the end opening of the exhaust pipe, and a lid is removably attached to the exchange hole with a bolt or the like, and exhaust air is exhausted on the inner surface of the lid. A catalyst mounting structure for a motorcycle, in which a catalyst for purifying gas is integrally mounted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4885795A JPH08246859A (en) | 1995-03-08 | 1995-03-08 | Catalyst installing structure for motorcycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4885795A JPH08246859A (en) | 1995-03-08 | 1995-03-08 | Catalyst installing structure for motorcycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08246859A true JPH08246859A (en) | 1996-09-24 |
Family
ID=12814949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4885795A Pending JPH08246859A (en) | 1995-03-08 | 1995-03-08 | Catalyst installing structure for motorcycle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08246859A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1094207A1 (en) * | 1999-10-20 | 2001-04-25 | dmc2 Degussa Metals Catalysts Cerdec AG | Silencer for two-stroke engines containing a catalytic device and catalytic device therefor |
| WO2009008017A1 (en) * | 2007-07-09 | 2009-01-15 | Bartolomeo Decarolis | Method for replacing catalysts and particulate filters |
| KR200469821Y1 (en) * | 2012-09-28 | 2013-11-12 | 두산엔진주식회사 | Reactor for selective catalytic reuction |
| CN108487981A (en) * | 2018-04-14 | 2018-09-04 | 盐城士联凯精密机电制造有限公司 | A kind of auto exhaust muffler device |
-
1995
- 1995-03-08 JP JP4885795A patent/JPH08246859A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1094207A1 (en) * | 1999-10-20 | 2001-04-25 | dmc2 Degussa Metals Catalysts Cerdec AG | Silencer for two-stroke engines containing a catalytic device and catalytic device therefor |
| WO2009008017A1 (en) * | 2007-07-09 | 2009-01-15 | Bartolomeo Decarolis | Method for replacing catalysts and particulate filters |
| KR200469821Y1 (en) * | 2012-09-28 | 2013-11-12 | 두산엔진주식회사 | Reactor for selective catalytic reuction |
| CN108487981A (en) * | 2018-04-14 | 2018-09-04 | 盐城士联凯精密机电制造有限公司 | A kind of auto exhaust muffler device |
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