JPS6343564B2 - - Google Patents
Info
- Publication number
- JPS6343564B2 JPS6343564B2 JP55018700A JP1870080A JPS6343564B2 JP S6343564 B2 JPS6343564 B2 JP S6343564B2 JP 55018700 A JP55018700 A JP 55018700A JP 1870080 A JP1870080 A JP 1870080A JP S6343564 B2 JPS6343564 B2 JP S6343564B2
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- exhaust
- chamber
- expansion chamber
- exhaust gas
- 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
Links
- 239000003054 catalyst Substances 0.000 claims description 59
- 238000005192 partition Methods 0.000 claims description 18
- 238000000746 purification Methods 0.000 claims description 9
- 230000003197 catalytic effect Effects 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 230000030279 gene silencing Effects 0.000 description 17
- 230000004913 activation Effects 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 239000011358 absorbing material Substances 0.000 description 3
- 230000010349 pulsation Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001502 supplementing 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
- 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)
Description
【発明の詳細な説明】
本発明は、マフラーに排気浄化用の触媒を装着
した内燃機関の触媒式排気装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a catalytic exhaust system for an internal combustion engine in which a muffler is equipped with a catalyst for purifying exhaust gas.
排気浄化対策としてマフラーに触媒を装着する
ことが広く採用されているが、この触媒によつて
排気抵抗が増加し、エンジン出力が低下する虞れ
がある。このことから、触媒を大型化して排気抵
抗を減少させることも考えられるが、このように
すると高価な触媒を多量に必要とし、コスト高と
なる不具合がある。 Although it is widely used to install a catalyst in a muffler as an exhaust purification measure, this catalyst increases exhaust resistance and may reduce engine output. For this reason, it is conceivable to increase the size of the catalyst to reduce the exhaust resistance, but this would require a large amount of expensive catalyst, resulting in high costs.
しかも、触媒を大型化した場合には、触媒の容
量に対して排気量が少なくなるので、特に寒冷始
動時にあつては触媒が活性開始温度に到達するま
でに時間を要してしまい、浄化効率が低下する等
の問題もある。 Moreover, if the catalyst is made larger, the exhaust volume will be smaller than the catalyst capacity, so it will take more time for the catalyst to reach its activation temperature, especially during cold starts, resulting in improved purification efficiency. There are also problems such as a decrease in
本発明はこのような事情にもとづいてなされた
もので、排気抵抗を増加させることなく、触媒を
小型化することができ、しかも、触媒が短時間の
うちに活性開始温度にまで到達し、排気浄化効率
が向上する内燃機関の触媒式排気装置の提供を目
的とする。 The present invention was developed based on the above circumstances, and it is possible to downsize the catalyst without increasing exhaust resistance, and moreover, the catalyst reaches its activation temperature in a short time, reducing the exhaust gas. The purpose of the present invention is to provide a catalytic exhaust system for an internal combustion engine that improves purification efficiency.
すなわち、本発明は上記目的を達成するため、
エンジンの排気管にマフラーを接続し、このマフ
ラーの内部を複数の隔壁により排気上流側から膨
張室、排気浄化用の触媒が装着される触媒収容室
および消音室に区画し、この触媒収容室に隣接す
る膨張室に補助膨張室を接続するとともに、この
膨張室内に上記排気管の下流端部を導入し、この
排気管の下流端開口部を上記触媒収容室を構成す
る隔壁に対向させて設けたことを特徴とする。 That is, in order to achieve the above object, the present invention
A muffler is connected to the exhaust pipe of the engine, and the interior of the muffler is divided from the exhaust upstream side into an expansion chamber, a catalyst storage chamber in which a catalyst for exhaust purification is installed, and a muffling chamber by multiple partition walls. An auxiliary expansion chamber is connected to the adjacent expansion chamber, a downstream end of the exhaust pipe is introduced into the expansion chamber, and the downstream end opening of the exhaust pipe is provided to face the partition wall constituting the catalyst storage chamber. It is characterized by:
以下本発明を第１図ないし第５図に示す第１実
施例にもづいて説明する。 The present invention will be explained below based on a first embodiment shown in FIGS. 1 to 5.
第１図は自動二輪車を示し、１はフレーム、２
は単気筒エンジン、３は操向輪、４は駆動輪、５
は燃料タンク、６はシートである。エンジン２の
排気孔には、２重管構造をなす排気管７が接続さ
れており、この排気管７の排気下流端にはマフラ
ー８が連結されている。そして、このマフラー８
内は第３図に示すように、排気上流側から順に膨
張室１１、触媒収容室１０および消音室９の三室
に区画されている。すなわち、膨張室１１、収容
室１０および消音室９は、隔壁１２ａ，１２ｂ，
１２ｃにより区画形成されており、膨張室１１と
触媒収容室１０とは、隔壁１２ａに設けた絞り通
路１３ａを介して連通されている。また、消音室
９と触媒収容室１０とは、隔壁１２ｂに設けた絞
り通路１３ｂおよび複数の連通孔１４を介して連
通されており、絞り通路１３ａと１３ｂとは、互
に対向して設けられている。そして、触媒収容室
１０内には排気浄化用の触媒１５が装着されてい
る。消音室９内には周面に多数の透孔１６を備え
たテールパイプ１７が挿通されている。このテー
ルパイプ１７の一端は触媒収容室１０内に、他端
は外部に開口されており、このテールパイプ１７
の外周面には、例えば繊維状のグラスフアイバか
らなる吸音材１８が被着されている。 Figure 1 shows a motorcycle, where 1 is a frame, 2
is a single-cylinder engine, 3 is a steering wheel, 4 is a driving wheel, 5
is a fuel tank, and 6 is a seat. An exhaust pipe 7 having a double pipe structure is connected to the exhaust hole of the engine 2, and a muffler 8 is connected to the downstream end of the exhaust pipe 7. And this muffler 8
As shown in FIG. 3, the interior is divided into three chambers, an expansion chamber 11, a catalyst storage chamber 10, and a muffling chamber 9, in order from the exhaust upstream side. That is, the expansion chamber 11, the storage chamber 10, and the silencing chamber 9 are separated by partition walls 12a, 12b,
12c, and the expansion chamber 11 and the catalyst storage chamber 10 are communicated with each other via a throttle passage 13a provided in the partition wall 12a. Further, the silencing chamber 9 and the catalyst storage chamber 10 are communicated with each other via a throttle passage 13b provided in the partition wall 12b and a plurality of communication holes 14, and the throttle passages 13a and 13b are provided facing each other. ing. A catalyst 15 for purifying exhaust gas is installed in the catalyst housing chamber 10. A tail pipe 17 having a large number of through holes 16 on its circumferential surface is inserted into the muffling chamber 9 . One end of this tail pipe 17 is opened into the catalyst storage chamber 10 and the other end is opened to the outside.
A sound absorbing material 18 made of, for example, fibrous glass fiber is adhered to the outer peripheral surface of.
ところで、マフラー８の途中、つまり触媒１５
よりも排気上流側には、エンジン２の後方下部に
位置するようにしてサブマフラー１９が連結さ
れ、このサブマフラー１９内は比較的大容量の補
助膨張室２０をなしている。この補助膨張室２０
は膨張室１１の容量を補うものであり、この補助
膨張室２０はマフラー８の周面に設けた導通孔２
１を介して膨張室１１に連通されている。また、
膨張室１１内には排気管７の下流端に一体的に連
なる内管２２が導入されており、この内管２２の
下流端開口部２２ａは触媒収容室１０を構成する
隔壁１２ａに対向して設けられている。 By the way, in the middle of muffler 8, that is, catalyst 15
A sub-muffler 19 is connected to the upstream side of the exhaust gas so as to be located at the lower rear of the engine 2, and the inside of this sub-muffler 19 forms an auxiliary expansion chamber 20 having a relatively large capacity. This auxiliary expansion chamber 20
is for supplementing the capacity of the expansion chamber 11.
It communicates with the expansion chamber 11 via 1. Also,
An inner pipe 22 that is integrally connected to the downstream end of the exhaust pipe 7 is introduced into the expansion chamber 11, and the downstream end opening 22a of the inner pipe 22 faces the partition wall 12a that constitutes the catalyst storage chamber 10. It is provided.
このような構成によれば、通常の運転状態にお
いて、エンジン２から排気管７および内管２２を
通じて間欠的に送られてくる排気は、第３図中矢
印で示されるように、まず膨張室１１内に流入
し、この膨張室１１で膨張する。 According to this configuration, under normal operating conditions, the exhaust gas intermittently sent from the engine 2 through the exhaust pipe 7 and the inner pipe 22 first passes through the expansion chamber 11 as indicated by the arrow in FIG. and expands in this expansion chamber 11.
そして、この場合、内管２２の下流端開口部２
２ａは触媒収容室１０の周壁となる隔壁１２ａに
対向しているので、膨張室１１内に流入した排気
流は隔壁１２ａに対し正面から衝突することにな
り、この後、排気の一部は絞り通路１３ａを通じ
て触媒収容室１０に流入するとともに、残りは導
通孔２１を通じて補助膨張室２０に流入する。 In this case, the downstream end opening 2 of the inner pipe 22
2a faces the partition wall 12a, which is the peripheral wall of the catalyst storage chamber 10, so the exhaust flow flowing into the expansion chamber 11 collides head-on with the partition wall 12a, and after this, a part of the exhaust gas is throttled. It flows into the catalyst storage chamber 10 through the passage 13a, and the rest flows into the auxiliary expansion chamber 20 through the through hole 21.
そして、補助膨張室２０に流入した排気は、こ
の内部で再び膨張して一次的に蓄えられることに
なる。このため排気はその脈動が規制されて略継
続的に触媒収容室１０に送り込まれることにな
り、この結果、触媒収容室１０に一度に多量の排
気が送り込まれることが防止される。したがつ
て、マフラー８内において触媒１５に接触する排
気量が見掛け上少なくなるから、浄化効率を低下
させることなく、触媒１５を小型化することがで
き、高価な触媒１５が少なくて済む。加えて、触
媒１５の小型化に伴つてマフラー８も小型化でき
るので、特に自動二輪車のようにマフラー８が外
観上の重要な要素となるものには好都合となる。 Then, the exhaust gas that has flowed into the auxiliary expansion chamber 20 is expanded again inside this chamber and temporarily stored. Therefore, the pulsation of the exhaust gas is regulated and the exhaust gas is sent substantially continuously into the catalyst storage chamber 10, and as a result, a large amount of exhaust gas is prevented from being sent into the catalyst storage chamber 10 at once. Therefore, the amount of exhaust gas that comes into contact with the catalyst 15 in the muffler 8 is apparently reduced, so the catalyst 15 can be made smaller without reducing the purification efficiency, and the number of expensive catalysts 15 can be reduced. In addition, as the catalyst 15 is made smaller, the muffler 8 can also be made smaller, which is particularly advantageous for motorcycles where the muffler 8 is an important element in appearance.
しかも、排気の脈動が規制されることにより、
触媒１５に接触する際の排気は、略なめらかな定
常流となり、このため、排気抵抗が少なくなり、
エンジン２の出力低下を防止できる。 Moreover, by regulating the exhaust pulsation,
The exhaust gas when it comes into contact with the catalyst 15 becomes a substantially smooth steady flow, which reduces exhaust resistance.
A decrease in the output of the engine 2 can be prevented.
また、膨張室１１内に排気を導く内管２２の下
流端開口部２２ａは、触媒収容室１０の周壁とな
る隔壁１２ａに対向しているので、高温高圧な排
気流が隔壁１２ａに対し正面から衝突することに
なる。このため、触媒収容室１０ひいては触媒１
５の温度上昇が促進され、この触媒１５が活性開
始温度に至る立上り時間が早くなる。したがつ
て、特に寒冷始動時での排気浄化効率が向上す
る。 Further, since the downstream end opening 22a of the inner pipe 22 that guides the exhaust gas into the expansion chamber 11 faces the partition wall 12a that is the peripheral wall of the catalyst storage chamber 10, the high temperature and high pressure exhaust flow is directed from the front to the partition wall 12a. There will be a collision. For this reason, the catalyst storage chamber 10 and the catalyst 1
The rise in temperature of the catalyst 15 is promoted, and the rise time for the catalyst 15 to reach the activation starting temperature becomes faster. Therefore, the exhaust gas purification efficiency is improved, especially during a cold start.
なお、触媒１５で浄化された排気は、絞り通路
１３ｂおよび連通孔１４を通つて消音室９に流入
したのち、吸音材１８を介してテールパイプ１７
に流入して外方に排出され、この排出されるまで
の過程において、排気圧力、排気温度が徐々に下
げられ消音されるのである。 Note that the exhaust gas purified by the catalyst 15 flows into the silencing chamber 9 through the throttle passage 13b and the communication hole 14, and then passes through the sound absorbing material 18 to the tail pipe 17.
During the process until the exhaust gas is discharged, the exhaust pressure and temperature are gradually lowered and the exhaust gas is muffled.
また、本発明は上述した第１実施例に制約され
るものではなく、以下に第２および第３実施例を
説明する。ここで、上記第１実施例と同一構成部
分は同一番号を附し、その説明を省略する。 Furthermore, the present invention is not limited to the first embodiment described above, and second and third embodiments will be described below. Here, the same components as those in the first embodiment are given the same numbers, and the explanation thereof will be omitted.
すなわち、第６図ないし第８図は本発明の第２
実施例を示し、このものは消音室３１を仕切壁３
２によつて１次消音室３３ａおよび２次消音室３
３ｂに区画し、１次消音室３３ａと触媒収容室１
０とを排気通路３４によつて連通させるととも
に、１次消音室３３ａと２次消音室３３ｂ相互を
絞り孔３５，３５によつて連通させ、この２次消
音室３３ｂ内にテールパイプ１７の一端を開口さ
せたものである。 That is, FIGS. 6 to 8 illustrate the second aspect of the present invention.
An example is shown, in which a silencing room 31 is separated by a partition wall 3.
2, the primary silencing chamber 33a and the secondary silencing chamber 3
3b, a primary silencing chamber 33a and a catalyst storage chamber 1.
0 through the exhaust passage 34, and the primary silencing chamber 33a and the secondary silencing chamber 33b are communicated with each other through throttle holes 35, 35, and one end of the tail pipe 17 is placed in the secondary silencing chamber 33b. It is opened.
このように構成しても、エンジン２からの排気
の一部は補助膨張室２０に１次的に蓄えられると
ともに、膨張室１１内に流入した高温高圧な排気
が隔壁１２ａに対し正面から衝突するので、上述
した第１実施例と同様の効果が得られる。そし
て、浄化された排気は第６図中矢印で示されるよ
うに、排気通路３４を介して１次消音室３３ａに
流入するので、この１次消音室３３ａの方が２次
消音室３３ｂよりも高圧となり、この流入した排
気の一部は吸音材１８、絞り孔３５，３５を介し
て低圧の２次消音室３３ｂ内に吸い込まれ、テー
ルパイプ１７を通して外部に排出されるのであ
る。 Even with this configuration, a part of the exhaust gas from the engine 2 is primarily stored in the auxiliary expansion chamber 20, and the high-temperature, high-pressure exhaust gas that has flowed into the expansion chamber 11 collides head-on with the partition wall 12a. Therefore, the same effects as in the first embodiment described above can be obtained. Then, the purified exhaust gas flows into the primary silencing chamber 33a through the exhaust passage 34, as shown by the arrow in FIG. The pressure becomes high, and a part of the inflowing exhaust gas is sucked into the low-pressure secondary silencing chamber 33b through the sound absorbing material 18 and the throttle holes 35, 35, and is discharged to the outside through the tail pipe 17.
また、第９図ないし第１１図は本発明の第３実
施例を示し、このものは内管２２の下流端開口部
２２ａを隔壁１２ｂ側に延長し、この内管２２の
側面に導通孔２１に正対するようにして排気流出
孔４１を設け、かつ膨張室１１と消音室９とを排
気通路４２によつて連通させるとともに、上記第
２実施例において２次消音室３３ｂに相当する室
を触媒収容室１０として、ここに触媒１５を装着
したものである。 9 to 11 show a third embodiment of the present invention, in which the downstream end opening 22a of the inner tube 22 is extended toward the partition wall 12b, and a through hole 21 is formed in the side surface of the inner tube 22. An exhaust outlet hole 41 is provided so as to directly face the expansion chamber 11 and the silencing chamber 9, and the expansion chamber 11 and the silencing chamber 9 are communicated with each other through the exhaust passage 42. A catalyst 15 is installed here as a storage chamber 10.
この構成の場合、エンジン２からの排気の一部
は、第９図中矢印で示されるように排気流出孔４
１および導通孔２１を介して補助膨張室２０に流
入して１次的に蓄えられるから、上記排気は略継
続的に排気通路４２に流入し、まず１次消音室３
３ａ内に流入する。このため消音室３３ａの方が
触媒収容室１０よりも高圧となるので、この排気
は絞り孔３５，３５を通じて触媒収容室１０に流
入して触媒１５に接触し、テールパイプ１７を通
じて外部に排出される。 In this configuration, a part of the exhaust from the engine 2 is transferred to the exhaust outlet 4 as shown by the arrow in FIG.
Since the exhaust gas flows into the auxiliary expansion chamber 20 through the silencing chamber 1 and the conduction hole 21 and is primarily stored, the exhaust gas almost continuously flows into the exhaust passage 42 and first flows into the primary silencing chamber 3.
3a. Therefore, the pressure in the silencing chamber 33a is higher than that in the catalyst storage chamber 10, so this exhaust gas flows into the catalyst storage chamber 10 through the throttle holes 35, 35, contacts the catalyst 15, and is discharged to the outside through the tail pipe 17. Ru.
したがつて、この第３実施例によれば、触媒１
５に接触する排気量は少なくなるから、上記第１
実施例と同様の効果が得られるとともに、内管２
２の下流端開口部２２ａが隔壁１２ｂに近づいた
分だけ、触媒収容室１０の温度上昇が促進され、
触媒１５の活性開始時間がより短くなる等の利点
がある。 Therefore, according to this third embodiment, the catalyst 1
Since the amount of exhaust gas that comes into contact with 5 is reduced, the above first
The same effects as in the embodiment can be obtained, and the inner tube 2
The temperature rise in the catalyst storage chamber 10 is promoted by the amount that the downstream end opening 22a of the catalyst storage chamber 10 is closer to the partition wall 12b.
There are advantages such as a shorter activation time of the catalyst 15.
なお、本発明に係る触媒式排気装置は、自動二
輪車用に特定されず、その他の車輌例えば自動三
輪車にも同様に適用実施可能である。 Note that the catalytic exhaust system according to the present invention is not specified for use in motorcycles, but can be similarly applied to other vehicles such as tricycles.
以上説明した本発明によれば、エンジンの排気
は補助膨張室で膨張して１次的に蓄えられるか
ら、この排気は脈動が規制されて略継続的に触媒
に送り込まれる。したがつて、マフラー内におい
て触媒に接触する排気量は少なくなるから、浄化
効率を低下させることなく、触媒を小型化するこ
とができ、高価な触媒が少なくて済む。それとと
もに、触媒に接触する際の排気は略なめらかな定
常流となるから、排気抵抗が少なくなり、エンジ
ンの出力低下を防止できる。 According to the present invention described above, the exhaust gas from the engine is expanded in the auxiliary expansion chamber and is primarily stored, so that the pulsation of this exhaust gas is regulated and it is sent substantially continuously to the catalyst. Therefore, the amount of exhaust gas that comes into contact with the catalyst in the muffler is reduced, so the catalyst can be made smaller without reducing purification efficiency, and less expensive catalysts are needed. At the same time, since the exhaust gas becomes a substantially smooth steady flow when it comes into contact with the catalyst, exhaust resistance is reduced and a decrease in engine output can be prevented.
また、膨張室内に導入された高温高圧な排気流
は、触媒収容室の周壁となる隔壁に対し正面から
衝突するので、この触媒収容室ひいては触媒の温
度上昇が促進され、この触媒が活性開始温度に至
る立上がり時間が早くなる。したがつて、特に寒
冷始動時での排気浄化効率が向上する利点があ
る。 In addition, the high-temperature, high-pressure exhaust flow introduced into the expansion chamber collides head-on with the partition wall that forms the peripheral wall of the catalyst storage chamber, which accelerates the temperature rise of the catalyst storage chamber and the catalyst, bringing the catalyst to the activation starting temperature. The rise time to reach is faster. Therefore, there is an advantage that the exhaust gas purification efficiency is improved, especially during a cold start.
第１図ないし第５図は本発明の第１実施例を示
し、第１図は自動二輪の側面図、第２図は排気装
置の平面図、第３図はマフラーの断面図、第４図
は第３図中−線に沿う断面図、第５図は第３
図中−線に沿う断面図、第６図ないし第８図
は本発明の第２実施例を示し、第６図はマフラー
の断面図、第７図は第６図中−線に沿う断面
図、第８図は第６図中−線に沿う断面図、第
９図ないし第１１図は本発明の第３実施例を示
し、第９図はマフラーの断面図、第１０図は第９
図中−線に沿う断面図、第１１図は第９図中
XI−XI線に沿う断面図である。
２…エンジン（単気筒エンジン）、７…排気管、
８…マフラー、９，３１…消音室、１０…触媒収
容室、１２ａ，１２ｂ，１２ｃ…隔壁、１５…触
媒、２０…補助膨張室、２２…内管、２２ａ…下
流端開口部。
Figures 1 to 5 show a first embodiment of the present invention, with Figure 1 being a side view of the motorcycle, Figure 2 being a plan view of the exhaust system, Figure 3 being a sectional view of the muffler, and Figure 4 being a side view of the motorcycle. is a sectional view taken along the line - in Fig. 3, and Fig. 5 is a sectional view taken along the - line in Fig. 3.
6 to 8 show a second embodiment of the present invention, FIG. 6 is a sectional view of the muffler, and FIG. 7 is a sectional view taken along the line in FIG. 6. , FIG. 8 is a sectional view taken along the line - in FIG. 6, FIGS. 9 to 11 show a third embodiment of the present invention, FIG. 9 is a sectional view of the muffler, and FIG.
Figure 11 is a cross-sectional view along the line in Figure 9.
It is a sectional view along the XI-XI line. 2...Engine (single-cylinder engine), 7...Exhaust pipe,
8...Muffler, 9, 31...Muffling chamber, 10...Catalyst storage chamber, 12a, 12b, 12c...Partition wall, 15...Catalyst, 20...Auxiliary expansion chamber, 22...Inner pipe, 22a...Downstream end opening.
Claims (1)
マフラーの内部を複数の隔壁により排気上流側か
ら膨張室、排気浄化用の触媒が装着される触媒収
容室および消音室に区画し、この触媒収容室に隣
接する膨張室に補助膨張室を接続するとともに、
この膨張室内に上記排気管の下流端部を導入し、
この排気管の下流端開口部を上記触媒収容室を構
成する隔壁に対向させて設けたことを特徴とする
内燃機関の触媒式排気装置。1. A muffler is connected to the exhaust pipe of the engine, and the interior of the muffler is divided from the exhaust upstream side into an expansion chamber, a catalyst storage chamber in which a catalyst for exhaust purification is installed, and a muffling chamber by a plurality of partition walls. Connecting the auxiliary expansion chamber to the expansion chamber adjacent to the
Introducing the downstream end of the exhaust pipe into this expansion chamber,
A catalytic exhaust system for an internal combustion engine, characterized in that a downstream end opening of the exhaust pipe is provided opposite to a partition wall constituting the catalyst storage chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1870080A JPS56115810A (en) | 1980-02-18 | 1980-02-18 | Exhaust device of internal combustion engine using catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1870080A JPS56115810A (en) | 1980-02-18 | 1980-02-18 | Exhaust device of internal combustion engine using catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56115810A JPS56115810A (en) | 1981-09-11 |
| JPS6343564B2 true JPS6343564B2 (en) | 1988-08-31 |
Family
ID=11978901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1870080A Granted JPS56115810A (en) | 1980-02-18 | 1980-02-18 | Exhaust device of internal combustion engine using catalyst |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56115810A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59159722U (en) * | 1983-04-12 | 1984-10-26 | マツダ株式会社 | engine exhaust system |
| JPS60141414U (en) * | 1984-02-28 | 1985-09-19 | ヤマハ発動機株式会社 | Motorcycle exhaust system |
| JP3369335B2 (en) * | 1994-11-07 | 2003-01-20 | 本田技研工業株式会社 | Exhaust gas purification device |
| JP4655743B2 (en) * | 2005-04-27 | 2011-03-23 | スズキ株式会社 | Motorcycle exhaust system |
| US7895832B2 (en) * | 2007-06-28 | 2011-03-01 | Harley-Davidson Motor Company Group, Inc. | Performance exhaust system |
| JP6051556B2 (en) * | 2012-03-22 | 2016-12-27 | いすゞ自動車株式会社 | Internal combustion engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5031312B2 (en) * | 1971-09-25 | 1975-10-09 | ||
| JPS52110317A (en) * | 1976-03-12 | 1977-09-16 | Yamaha Motor Co Ltd | Exhaust system with catalytic converter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS564807Y2 (en) * | 1973-07-18 | 1981-02-02 |
-
1980
- 1980-02-18 JP JP1870080A patent/JPS56115810A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5031312B2 (en) * | 1971-09-25 | 1975-10-09 | ||
| JPS52110317A (en) * | 1976-03-12 | 1977-09-16 | Yamaha Motor Co Ltd | Exhaust system with catalytic converter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56115810A (en) | 1981-09-11 |
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