JPH0586843A - Exhaust gas purifying device for motorcycle - Google Patents
Exhaust gas purifying device for motorcycleInfo
- Publication number
- JPH0586843A JPH0586843A JP3247595A JP24759591A JPH0586843A JP H0586843 A JPH0586843 A JP H0586843A JP 3247595 A JP3247595 A JP 3247595A JP 24759591 A JP24759591 A JP 24759591A JP H0586843 A JPH0586843 A JP H0586843A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- exhaust gas
- exhaust
- motorcycle
- main catalyst
- 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
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、メイン触媒の配置位
置にて排ガス温度が低い場合にこの排ガス温度を上昇さ
せて排ガスを浄化する自動二輪車の排ガス浄化装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purifying apparatus for a motorcycle that purifies exhaust gas by raising the exhaust gas temperature when the temperature of the exhaust gas is low at the position where the main catalyst is arranged.
【０００２】[0002]
【従来の技術】従来のエキゾースト系、例えば自動四輪
車の４サイクルエンジンのエキゾースト系では、メイン
触媒の配置位置にて排ガス温度が低く、メイン触媒の反
応温度に達しない場合、図８に示すように、エキゾース
トマニホールド１の集合部２に、プレ触媒としてのハニ
カム触媒３を設置し、メイン触媒４へ至る排ガスの温度
を上昇させている。このハニカム触媒３は、上記集合部
２の内径と略同程度の外径を有して、集合部２を流れる
排ガスの全てを通過させる全流式の触媒である。2. Description of the Related Art In a conventional exhaust system, for example, an exhaust system of a four-cycle engine for a four-wheeled motor vehicle, when the exhaust gas temperature is low at the position where the main catalyst is arranged and the reaction temperature of the main catalyst is not reached, FIG. As described above, the honeycomb catalyst 3 as a pre-catalyst is installed in the collecting portion 2 of the exhaust manifold 1 to raise the temperature of the exhaust gas reaching the main catalyst 4. The honeycomb catalyst 3 is a full-flow type catalyst that has an outer diameter approximately the same as the inner diameter of the collecting portion 2 and allows all of the exhaust gas flowing through the collecting portion 2 to pass through.
【０００３】ところで、自動二輪車の２サイクルエンジ
ンに接続されるエキゾースト系において、図９に示すよ
うに、エキゾースト系ボデー５のディフューザ部６に上
述のような全流式のハニカム触媒７を設置すると、排気
脈動の反射波がハニカム触媒７にて発生するため、エン
ジン出力が著しく低下してしまう。なお、この図９では
メイン触媒は省略している。By the way, in the exhaust system connected to the two-cycle engine of the motorcycle, as shown in FIG. 9, when the above-mentioned full-flow type honeycomb catalyst 7 is installed in the diffuser portion 6 of the exhaust system body 5, Since the reflected wave of the exhaust pulsation is generated in the honeycomb catalyst 7, the engine output is significantly reduced. The main catalyst is omitted in FIG.
【０００４】そこで、従来の自動二輪車における２サイ
クルエンジンのエキゾースト系では、図１０に示すよう
に、エキゾースト系ボデー８の膨張室９にメイン触媒１
０を配置し、ディフューザ部１１にアルミナファイバー
の布触媒１２を設置している。この布触媒１２は、パン
チングプレート１３の裏面に貼着され、このパンチング
プレート１３を介してディフューザ部１１に固定され
る。この布触媒１２により、排ガスの温度を上昇させ
て、メイン触媒１０の反応を良好にしている。Therefore, as shown in FIG. 10, in the conventional exhaust system for a two-cycle engine in a motorcycle, the main catalyst 1 is placed in the expansion chamber 9 of the exhaust system body 8.
0 is arranged, and the alumina fiber cloth catalyst 12 is installed in the diffuser portion 11. The cloth catalyst 12 is attached to the back surface of the punching plate 13 and fixed to the diffuser portion 11 via the punching plate 13. The cloth catalyst 12 raises the temperature of the exhaust gas to improve the reaction of the main catalyst 10.
【０００５】また、従来の２サイクルエンジンにおける
エキゾースト系では、図１１に示すように、パンチング
プレート１３の裏面に溶射触媒１４を付着し、この溶射
触媒１４により排ガス温度を上昇させて、メイン触媒１
０の反応を良好にしている。Further, in the exhaust system of the conventional two-cycle engine, as shown in FIG. 11, the thermal spray catalyst 14 is attached to the back surface of the punching plate 13, and the exhaust gas temperature is raised by the thermal spray catalyst 14 to make the main catalyst 1
0 reaction is good.
【０００６】[0006]
【発明が解決しようとする課題】ところが、上述のよう
な図１０に示すエキゾースト系では、布触媒１２が経年
劣化し易く、耐久性の点において難点がある。また、図
１１に示すエキゾースト系では、コストが上昇してしま
う。However, in the exhaust system shown in FIG. 10 as described above, the cloth catalyst 12 is prone to deterioration over time, and there is a problem in durability. Further, in the exhaust system shown in FIG. 11, the cost will increase.
【０００７】この発明は、上述の事情を考慮してなされ
たものであり、エンジン出力を低下させることなくメイ
ン触媒の反応温度を上昇させることができる安価で耐久
性の良好な自動二輪車の排ガス浄化装置を提供すること
を目的とする。The present invention has been made in view of the above circumstances, and is an inexpensive and durable motorcycle exhaust gas purification system capable of raising the reaction temperature of the main catalyst without lowering the engine output. The purpose is to provide a device.
【０００８】[0008]
【課題を解決するための手段】この発明は、エキゾース
ト系ボデーの排ガスの流れの下流側に上記排ガスを浄化
するメイン触媒が配置され、このメイン触媒の上流側に
排ガス温度を上昇させるプレ触媒が配置され、このプレ
触媒は上記エキゾースト系ボデーの直径方向中央位置に
設けられたものである。According to the present invention, a main catalyst for purifying the exhaust gas is arranged on the downstream side of the exhaust gas flow of the exhaust body, and a pre-catalyst for increasing the exhaust gas temperature is provided on the upstream side of the main catalyst. The pre-catalyst is arranged at the central position in the diametrical direction of the exhaust body.
【０００９】[0009]
【作用】したがって、この発明に係る自動二輪車の排ガ
ス浄化装置によれば、プレ触媒がエキゾースト系ボデー
の直径方向中央位置に設置されたので、プレ触媒により
温度上昇された排ガスの温度が上記ボデーの壁面へ伝わ
りにくく、排ガス温度を高温に維持できる。この結果、
メイン触媒の反応が良好になり、排ガスの浄化を促進で
きる。Therefore, according to the exhaust gas purifying apparatus for a motorcycle of the present invention, since the precatalyst is installed at the diametrically central position of the exhaust system body, the temperature of the exhaust gas raised by the precatalyst is higher than that of the body. It is difficult to reach the wall surface and the exhaust gas temperature can be maintained at a high temperature. As a result,
The reaction of the main catalyst becomes good, and the purification of exhaust gas can be promoted.
【００１０】また、プレ触媒がエキゾースト系ボデーの
直径方向中央位置に設置されたので、排気脈動波はプレ
触媒を迂回して膨張室後方へ至り、ここで反射し、プレ
触媒を迂回してエキゾースト系ボデーの入口側へ戻る。
このため、エンジン出力の低下を来すことがない。Further, since the pre-catalyst is installed at the central position in the diametrical direction of the exhaust system body, the exhaust pulsation wave bypasses the pre-catalyst and reaches the rear of the expansion chamber, and is reflected there, bypassing the pre-catalyst and exhausting. Return to the entrance side of the system body.
Therefore, the engine output does not decrease.
【００１１】[0011]
【実施例】以下、この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、この発明に係る自動二輪車の排ガ
ス浄化装置の一実施例が適用されたエキゾースト系を示
す断面図である。FIG. 1 is a sectional view showing an exhaust system to which an embodiment of an exhaust gas purifying apparatus for a motorcycle according to the present invention is applied.
【００１３】エキゾースト系ボデー２１は、エキゾース
トパイプ２２、ディフューザ部２３および膨張室２４が
順次連結して構成され、エキゾーストパイプ２２は２サ
イクルエンジンのシリンダ（図示せず）に接続されて排
ガスを導く。膨張室２４の後部には反射板２５が設置さ
れ、排気脈動波をこの反射板２５にて反射させ、混合気
の吹き抜けを防止する。The exhaust system body 21 is composed of an exhaust pipe 22, a diffuser portion 23 and an expansion chamber 24 which are sequentially connected to each other. The exhaust pipe 22 is connected to a cylinder (not shown) of a two-cycle engine to guide exhaust gas. A reflection plate 25 is installed at the rear part of the expansion chamber 24, and the pulsating exhaust gas is reflected by the reflection plate 25 to prevent the air-fuel mixture from passing through.
【００１４】また、膨張室２４内には、排気脈動波に支
障を来さない位置にメイン触媒２６が設置される。この
メイン触媒２６により、排ガスが浄化される。メイン触
媒２６の反応は、排ガスが所定の温度以上にあることが
必要であり、メイン触媒２６の配置位置では排ガス温度
が低下する傾向にある。そこで、この排ガス温度を上昇
させるために、プレ触媒としてのハニカム触媒２７が設
置されている。Further, in the expansion chamber 24, the main catalyst 26 is installed at a position where it does not interfere with the pulsating exhaust gas. The main catalyst 26 purifies the exhaust gas. The reaction of the main catalyst 26 requires that the exhaust gas be at a predetermined temperature or higher, and the exhaust gas temperature tends to decrease at the position where the main catalyst 26 is arranged. Therefore, in order to raise the exhaust gas temperature, a honeycomb catalyst 27 as a precatalyst is installed.
【００１５】ハニカム触媒２７は、図２および図３に示
すように、円筒形状のシェル２８内に、クッション２９
およびサポータ３０を介して触媒本体３１が収容され、
この触媒本体３１がリテーナ３２により位置決めされた
ものである。触媒本体３１は、ハニカム形状のセラミッ
クに触媒を塗布したものであり、この触媒本体３１内を
通過した排ガスの温度を上昇させる。As shown in FIGS. 2 and 3, the honeycomb catalyst 27 has a cushion 29 inside a cylindrical shell 28.
And the catalyst body 31 is accommodated via the supporter 30,
The catalyst body 31 is positioned by the retainer 32. The catalyst body 31 is a honeycomb-shaped ceramic coated with a catalyst, and raises the temperature of the exhaust gas passing through the inside of the catalyst body 31.
【００１６】ハニカム触媒２７は、ディフューザ２３の
内径より小さな外径を備え、ステー３３により、ディフ
ューザ部２３の直径方向中央位置に支持される。したが
って、ディフューザ部２３を流れる排ガスのうち、その
中央部を流れる排ガスの温度がハニカム触媒２７により
上昇し、他の排ガスはハニカム触媒２７内を流れず、ハ
ニカム触媒２７とディフューザ２３の壁面との間を通過
する。The honeycomb catalyst 27 has an outer diameter smaller than the inner diameter of the diffuser 23, and is supported by the stay 33 at the central position in the diametrical direction of the diffuser portion 23. Therefore, of the exhaust gas flowing through the diffuser portion 23, the temperature of the exhaust gas flowing through the central portion thereof rises due to the honeycomb catalyst 27, and the other exhaust gas does not flow inside the honeycomb catalyst 27, so that the temperature between the honeycomb catalyst 27 and the wall surface of the diffuser 23 increases. Pass through.
【００１７】上記実施例によれば、ハニカム触媒２７が
ディフューザ部２３の直径方向中央位置に設置されたの
で、ハニカム触媒２７により温度上昇された排ガスの温
度はディフューザ部２３の壁面に伝わりにくく、高温状
態に維持できる。このため、排ガスを早い時期からメイ
ン触媒２６の反応温度に設定することができ、メイン触
媒２６の反応を良好に維持できる。According to the above-mentioned embodiment, since the honeycomb catalyst 27 is installed at the center of the diffuser portion 23 in the diametrical direction, the temperature of the exhaust gas whose temperature is raised by the honeycomb catalyst 27 is hard to be transmitted to the wall surface of the diffuser portion 23, and the high temperature is high. Can be maintained in a state. Therefore, the exhaust gas can be set to the reaction temperature of the main catalyst 26 from an early stage, and the reaction of the main catalyst 26 can be favorably maintained.
【００１８】また、ハニカム触媒２７がディフューザ部
２３の直径方向中央位置に設置されたので、排気脈動波
は、図４の矢印に示すように、エキゾーストパイプ２２
からハニカム触媒２７を迂回して膨張室２４へ至り、反
射板２５にて反射し、この反射波は再びハニカム触媒２
７を迂回してエキゾーストパイプ２２へ至る。したがっ
て、混合気の吹き抜け防止に支障がなく、エンジン出力
を良好に維持できる。Further, since the honeycomb catalyst 27 is installed at the central position in the diametrical direction of the diffuser portion 23, the exhaust pulsating wave is generated by the exhaust pipe 22 as shown by the arrow in FIG.
From the honeycomb catalyst 27 to the expansion chamber 24 and reflected by the reflection plate 25, and the reflected wave is again reflected by the honeycomb catalyst 2
Detour 7 to reach exhaust pipe 22. Therefore, there is no problem in preventing blow-through of the air-fuel mixture, and the engine output can be favorably maintained.
【００１９】さらに、ハニカム触媒２７がディフューザ
部２３の直径方向中央位置に設置されて、一部の排ガス
のみがハニカム触媒２７内を流れるので、ハニカム触媒
２７による排ガスの温度が必要以上に上昇しない。した
がって、ハニカム触媒２７が全流式の触媒である場合に
比べ、ハニカム触媒２７の熱劣化を抑制できる。Further, since the honeycomb catalyst 27 is installed at the central position in the diametrical direction of the diffuser portion 23 and only part of the exhaust gas flows in the honeycomb catalyst 27, the temperature of the exhaust gas by the honeycomb catalyst 27 does not rise more than necessary. Therefore, thermal deterioration of the honeycomb catalyst 27 can be suppressed as compared with the case where the honeycomb catalyst 27 is a full-flow type catalyst.
【００２０】また、ハニカム触媒２７がハニカム形状の
セラミックに触媒を塗布したものであるため、従来の布
触媒に比べて耐久性が高く、しかも従来の溶射触媒に比
べコストを低減できる。Further, since the honeycomb catalyst 27 is formed by coating a honeycomb-shaped ceramic with the catalyst, it has higher durability than the conventional cloth catalyst, and can reduce the cost as compared with the conventional spray catalyst.
【００２１】図５は、この発明に係る自動二輪車の排ガ
ス浄化装置の他の実施例が適用されたエキゾースト系を
示す断面図である。この他の実施例において、上記一実
施例と同様な部分は、同一の符号を付すことにより説明
を省略する。FIG. 5 is a sectional view showing an exhaust system to which another embodiment of the exhaust gas purifying apparatus for a motorcycle according to the present invention is applied. In the other embodiments, the same parts as those in the above-mentioned one embodiment are designated by the same reference numerals and the description thereof will be omitted.
【００２２】この他の実施例におけるエキゾースト系ボ
デー３４では、膨張室２４の後方にサイレンサ３５が設
置され、このサイレンサ３５内にメイン触媒３６が設置
されている。In the exhaust system body 34 in the other embodiment, a silencer 35 is installed behind the expansion chamber 24, and a main catalyst 36 is installed in the silencer 35.
【００２３】この他の実施例においても、ハニカム触媒
２７がディフューザ部２３の直径方向中央位置に設置さ
れるので、メイン触媒３６の反応やエンジン出力を良好
にできると共に、耐久性やコストも良好に維持できる。Also in this other embodiment, since the honeycomb catalyst 27 is installed at the central position in the diametrical direction of the diffuser portion 23, the reaction of the main catalyst 36 and the engine output can be improved, and the durability and cost can be improved. Can be maintained.
【００２４】図６および図７は上記両実施例におけるハ
ニムカム触媒２７の支持部材の変形例を示す。この場
合、ハニカム触媒２７は、通過孔３７が開口された円形
プレート３８にて支持される。通過孔３７を排ガスの一
部が通過する。また、円形プレート３８は、ディフュー
ザ部２３を補強するリーンフォースメントとしても機能
する。FIGS. 6 and 7 show modifications of the supporting member of the honeycomb catalyst 27 in both the above embodiments. In this case, the honeycomb catalyst 27 is supported by the circular plate 38 having the passage holes 37 opened. Part of the exhaust gas passes through the passage hole 37. Further, the circular plate 38 also functions as a lean reinforcement that reinforces the diffuser portion 23.
【００２５】[0025]
【発明の効果】以上のように、この発明に係る自動二輪
車の排ガス浄化装置によれば、エキゾースト系ボデーの
排ガスの流れの下流側に上記排ガスを浄化するメイン触
媒が配置され、このメイン触媒の上流側に排ガス温度を
上昇させるプレ触媒が配置され、このプレ触媒は上記エ
キゾースト系ボデーの直径方向中央位置に設けられたの
で、エンジン出力を低下させることなく、メイン触媒の
反応を良好にできると共に、耐久性を向上させコストを
低減できる。As described above, according to the exhaust gas purifying apparatus for a motorcycle of the present invention, the main catalyst for purifying the exhaust gas is arranged on the downstream side of the exhaust gas flow of the exhaust system body. A pre-catalyst that raises the exhaust gas temperature is arranged on the upstream side, and since this pre-catalyst is provided at the diametrically central position of the exhaust system body, it is possible to improve the reaction of the main catalyst without reducing the engine output. The durability can be improved and the cost can be reduced.
【図１】この発明に係る自動二輪車の排ガス浄化装置の
一実施例が適用されたエキゾースト系を示す断面図。FIG. 1 is a sectional view showing an exhaust system to which an embodiment of an exhaust gas purifying apparatus for a motorcycle according to 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１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】図１のエキゾースト系において排気脈動波の作
動を示す図。4 is a diagram showing the operation of an exhaust pulsation wave in the exhaust system of FIG.
【図５】この発明の他の実施例が適用されたエキゾース
ト系を示す断面図。FIG. 5 is a sectional view showing an exhaust system to which another embodiment of the present invention is applied.
【図６】上記両実施例におけるハニカム触媒のステーの
変形例を示す一部断面図。FIG. 6 is a partial cross-sectional view showing a modified example of the stay of the honeycomb catalyst in both of the above-mentioned embodiments.
【図７】図６のVII −VII 線に沿う断面図。7 is a sectional view taken along line VII-VII of FIG.
【図８】自動四輪車の４サイクルエンジンに接続される
従来のエキゾースト系を示す断面図。FIG. 8 is a cross-sectional view showing a conventional exhaust system connected to a four-cycle engine of an automobile.
【図９】自動二輪車の２サイクルエンジンのエキゾース
ト系に全流式のハニカム触媒を設置したときの排気脈動
波の作動状態を示す図。FIG. 9 is a diagram showing an operating state of an exhaust pulsation wave when a full-flow type honeycomb catalyst is installed in an exhaust system of a two-cycle engine of a motorcycle.
【図１０】自動二輪車の２サイクルエンジンに接続され
る従来のエキゾースト系を示す断面図。FIG. 10 is a cross-sectional view showing a conventional exhaust system connected to a two-cycle engine of a motorcycle.
【図１１】自動二輪車の２サイクルエンジンに接続され
る従来の他のエキゾースト系を示す断面図。FIG. 11 is a sectional view showing another conventional exhaust system connected to a two-cycle engine of a motorcycle.
２１ エキゾースト系ボデー ２３ ディフューザ部 ２４ 膨張室 ２６ メイン触媒 ２７ ハニカム触媒 ３３ ステー ３５ サイレンサ 21 Exhaust Body 23 Diffuser Part 24 Expansion Chamber 26 Main Catalyst 27 Honeycomb Catalyst 33 Stay 35 Silencer
Claims (4)
下流側に上記排ガスを浄化するメイン触媒が配置され、
このメイン触媒の上流側に排ガス温度を上昇させるプレ
触媒が配置され、このプレ触媒は上記エキゾースト系ボ
デーの直径方向中央位置に設けられたことを特徴とする
自動二輪車の排ガス浄化装置。1. A main catalyst for purifying the exhaust gas is disposed downstream of the exhaust gas flow of the exhaust body,
An exhaust gas purifying apparatus for a motorcycle, characterized in that a pre-catalyst for raising the exhaust gas temperature is arranged upstream of the main catalyst, and the pre-catalyst is provided at a diametrically central position of the exhaust system body.
ーの膨張室に配置された請求項１記載の自動二輪車の排
ガス浄化装置。2. The exhaust gas purifying apparatus for a motorcycle according to claim 1, wherein the main catalyst is arranged in an expansion chamber of an exhaust body.
ーのサイレンサ室に配置された請求項１記載の自動二輪
車の排ガス浄化装置。3. The exhaust gas purifying apparatus for a motorcycle according to claim 1, wherein the main catalyst is arranged in a silencer chamber of an exhaust body.
項１、２または３のいずれかに記載の自動二輪車の排ガ
ス浄化装置。4. The exhaust gas purifying apparatus for a motorcycle according to claim 1, 2 or 3, wherein the pre-catalyst is a honeycomb catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3247595A JPH0586843A (en) | 1991-09-26 | 1991-09-26 | Exhaust gas purifying device for motorcycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3247595A JPH0586843A (en) | 1991-09-26 | 1991-09-26 | Exhaust gas purifying device for motorcycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0586843A true JPH0586843A (en) | 1993-04-06 |
Family
ID=17165850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3247595A Pending JPH0586843A (en) | 1991-09-26 | 1991-09-26 | Exhaust gas purifying device for motorcycle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0586843A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996027734A1 (en) * | 1995-03-07 | 1996-09-12 | Schatz Thermo Gastech Gmbh | Arrangement for reducing exhaust gas emissions from an internal combustion engine with an exhaust gas catalytic converter |
| JP2002070543A (en) * | 2000-08-28 | 2002-03-08 | Cataler Corp | Exhaust system |
| EP1314865A2 (en) | 2001-11-21 | 2003-05-28 | Cataler Corporation | Exhaust gas purifing apparatus |
| US7384609B2 (en) | 2003-01-29 | 2008-06-10 | Brp-Rotax Gmbh & Co. Kg | Pre-converter device for cleaning exhaust gas for an internal combustion engine |
| US7895832B2 (en) | 2007-06-28 | 2011-03-01 | Harley-Davidson Motor Company Group, Inc. | Performance exhaust system |
| WO2011101896A1 (en) * | 2010-02-17 | 2011-08-25 | トヨタ自動車株式会社 | Exhaust purifying device for internal combustion engine |
| DE10237667B4 (en) * | 2002-08-16 | 2013-05-29 | Andreas Stihl Ag & Co. | Exhaust silencer with a catalyst and a bluff body |
-
1991
- 1991-09-26 JP JP3247595A patent/JPH0586843A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996027734A1 (en) * | 1995-03-07 | 1996-09-12 | Schatz Thermo Gastech Gmbh | Arrangement for reducing exhaust gas emissions from an internal combustion engine with an exhaust gas catalytic converter |
| JP2002070543A (en) * | 2000-08-28 | 2002-03-08 | Cataler Corp | Exhaust system |
| JP4722268B2 (en) * | 2000-08-28 | 2011-07-13 | 株式会社キャタラー | Exhaust system |
| EP1314865A2 (en) | 2001-11-21 | 2003-05-28 | Cataler Corporation | Exhaust gas purifing apparatus |
| US7048895B2 (en) | 2001-11-21 | 2006-05-23 | Cataler Corporation | Exhaust gas purifying apparatus |
| DE10237667B4 (en) * | 2002-08-16 | 2013-05-29 | Andreas Stihl Ag & Co. | Exhaust silencer with a catalyst and a bluff body |
| US7384609B2 (en) | 2003-01-29 | 2008-06-10 | Brp-Rotax Gmbh & Co. Kg | Pre-converter device for cleaning exhaust gas for an internal combustion engine |
| US7895832B2 (en) | 2007-06-28 | 2011-03-01 | Harley-Davidson Motor Company Group, Inc. | Performance exhaust system |
| WO2011101896A1 (en) * | 2010-02-17 | 2011-08-25 | トヨタ自動車株式会社 | Exhaust purifying device for internal combustion engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3314241B2 (en) | Exhaust gas purification device for motorcycle engine | |
| JP4381868B2 (en) | Exhaust muffler with engine exhaust purification function | |
| CN101205822A (en) | Exhaust system of four-stroke engine | |
| US6024928A (en) | By-pass flow catalytic converter | |
| JPH0586843A (en) | Exhaust gas purifying device for motorcycle | |
| JPH0413376Y2 (en) | ||
| JP3350252B2 (en) | Exhaust gas purification device | |
| JP2576909B2 (en) | Exhaust purification system for two-cycle engine | |
| JP4722268B2 (en) | Exhaust system | |
| JP3286792B2 (en) | Engine exhaust purification device | |
| JP3213852B2 (en) | Engine exhaust purification device | |
| JP2890440B2 (en) | Exhaust pipe of motorcycle | |
| JP2727176B2 (en) | Engine exhaust purification device | |
| JP4014121B2 (en) | Engine exhaust gas purification device | |
| JP2800022B2 (en) | Exhaust gas purification device for internal combustion engine | |
| JPH07269331A (en) | Exhaust emission control device | |
| JP3022358B2 (en) | Exhaust system catalyst device | |
| JPS5844211A (en) | Purifying device of exhaust gas from engine | |
| JP2509686Y2 (en) | Silencer for internal combustion engine | |
| JP2581292Y2 (en) | Engine exhaust system | |
| JP3022340B2 (en) | Exhaust system catalyst device | |
| JPH0586844A (en) | Exhaust emission control device for motorcycle | |
| JPH04334717A (en) | Exhaust emission control device for small engine | |
| JP2889073B2 (en) | Air introduction device in exhaust pipe of internal combustion engine | |
| JP3563336B2 (en) | Automotive noise reduction system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080311 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090311 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100311 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110311 Year of fee payment: 14 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110311 Year of fee payment: 14 |
|
| LAPS | Cancellation because of no payment of annual fees |