JP2000080917A - Exhaust purifier with catalyzer - Google Patents
Exhaust purifier with catalyzerInfo
- Publication number
- JP2000080917A JP2000080917A JP10250928A JP25092898A JP2000080917A JP 2000080917 A JP2000080917 A JP 2000080917A JP 10250928 A JP10250928 A JP 10250928A JP 25092898 A JP25092898 A JP 25092898A JP 2000080917 A JP2000080917 A JP 2000080917A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- exhaust
- muffler
- exhaust muffler
- 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.)
- Granted
Links
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 28
- 229910052703 rhodium Inorganic materials 0.000 claims abstract description 28
- 239000010948 rhodium Substances 0.000 claims abstract description 28
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000004080 punching Methods 0.000 claims abstract description 10
- 239000003054 catalyst Substances 0.000 claims description 105
- 238000004891 communication Methods 0.000 claims description 58
- 230000002093 peripheral effect Effects 0.000 claims description 43
- 238000005192 partition Methods 0.000 claims description 21
- 239000011358 absorbing material Substances 0.000 claims description 19
- 229910001220 stainless steel Inorganic materials 0.000 claims description 12
- 239000010935 stainless steel Substances 0.000 claims description 12
- 210000002268 wool Anatomy 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000003197 catalytic effect Effects 0.000 abstract 4
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 238000012937 correction Methods 0.000 description 42
- 238000000034 method Methods 0.000 description 30
- 230000003584 silencer Effects 0.000 description 23
- 230000003647 oxidation Effects 0.000 description 14
- 238000007254 oxidation reaction Methods 0.000 description 14
- 238000000746 purification Methods 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 239000011491 glass wool Substances 0.000 description 9
- 238000009413 insulation Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- -1 panadium Chemical compound 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、主として自動二
輪車や四輪自動車に使用する排気マフラーに関するもの
で、詳しくはパイプ形の触媒部を備えた触媒付き排気マ
フラーに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust muffler mainly used for motorcycles and four-wheeled vehicles, and more particularly to an exhaust muffler with a catalyst having a pipe-shaped catalyst portion.
【０００２】[0002]
【従来の技術】従来、触媒付き排気マフラーとして、マ
フラー内にメイン触媒部を配置し、これとは別に排気マ
フラーよりも上流側の排気管内に、該排気管と同心の予
加熱用のパイプ形触媒部を環状の取付金具を介して配置
し、排気管の内周面とパイプ形触媒部の外周面管の環状
通路およびパイプ形触媒部内を、エンジンからの排気ガ
スが通過して排気マフラー内に流入するようにした構造
のものが知られている（たとえば特開平１０−１０３０
４６号公報参照）。なお、この排気マフラーは、複数の
排気管を最終的に集合させて共通の排気管とし、排気マ
フラーの前端面に設けた開口内に排気管の共通部を嵌挿
した構造からなる。2. Description of the Related Art Conventionally, as a catalyst-equipped exhaust muffler, a main catalyst portion is disposed in a muffler. Separately from this, a preheating pipe shape concentric with the exhaust pipe is provided in an exhaust pipe upstream of the exhaust muffler. The catalyst section is arranged via an annular mounting bracket, and the exhaust gas from the engine passes through the inside of the exhaust pipe and the inside of the pipe-shaped catalyst section through the annular passage of the pipe on the outer surface of the pipe-shaped catalyst section and inside the exhaust muffler. There is known a structure in which the air flows into the air (eg, Japanese Patent Laid-Open No. 10-1030).
No. 46). The exhaust muffler has a structure in which a plurality of exhaust pipes are finally assembled into a common exhaust pipe, and a common part of the exhaust pipe is inserted into an opening provided on a front end surface of the exhaust muffler.
【０００３】その他、触媒は備えていないが、排気マフ
ラー内に仕切壁部材を貫通して設けられる連通管の長さ
を変えた２本の連通管を設け、エンジンの排気口に一端
を接続した排気管を途中で２本に分離し、分離した各排
気管を排気マフラー内の長さの異なる２本の排気管に接
続した構造の排気マフラーが提案されている（たとえば
実開昭５９−２４９３８号公報参照）。この排気マフラ
ーにおいても、２本の排気管はそれぞれ排気マフラーの
前端面に設けた開口からマフラー内に嵌挿されている。[0003] In addition, although there is no catalyst, two communication pipes having different lengths of communication pipes provided through the partition wall member in the exhaust muffler are provided, and one end is connected to the exhaust port of the engine. There has been proposed an exhaust muffler having a structure in which an exhaust pipe is divided into two parts on the way and each separated exhaust pipe is connected to two exhaust pipes having different lengths in the exhaust muffler (for example, Japanese Utility Model Laid-Open No. 59-24938). Reference). Also in this exhaust muffler, the two exhaust pipes are fitted into the muffler through openings provided in the front end surface of the exhaust muffler.
【０００４】なお、図６および図７は先行技術に係る排
気マフラーを示すもので、図６の排気マフラー４１は触
媒を備えていないタイプで、図７の排気マフラー５１は
上記特開平１０−１０３０４６号公報に記載のものと同
一構造のパイプ形触媒部を備えたタイプである。まず、
排気マフラー４１は、図６のようにエンジンからの排気
管の延長管４２が前端面の開口より排気マフラー４１内
の前部消音室１Ａに嵌挿され、パイプ４３、後部消音室
１Ｃ、パイプ４４、中間消音室１Ｂ、テールパイプ４５
を順に経由して排気ガスが排出される。排気マフラー５
１では、図７のようにエンジンからの排気管の延長管５
２が前端面の開口より排気マフラー５１内に嵌挿され、
後部消音室１Ｃに連通されているが、延長管５２内には
この延長管５２と同心で小径のパイプ形触媒部５３が環
状取付金具５４・５５を前後に介設して配置されてい
る。なお、符号５６・５７は中間パイプ、符号５８はテ
ールパイプで、後部消音室１Ｃ内に流入した排気ガスは
前部消音室１Ａ、中間部消音室１Ｂを経由して、テール
パイプ５８により排出される。また、パイプ形触媒部５
３は多数のパンチ（ング）孔を有するパイプに、白金な
どの触媒素材をディッピングなどの方法で担持させたも
のである。FIGS. 6 and 7 show an exhaust muffler according to the prior art. The exhaust muffler 41 shown in FIG. 6 is of a type without a catalyst, and the exhaust muffler 51 shown in FIG. This is a type provided with a pipe-shaped catalyst portion having the same structure as that described in Japanese Unexamined Patent Application Publication No. H11-157,036. First,
As shown in FIG. 6, the exhaust muffler 41 is such that an extension pipe 42 of an exhaust pipe from an engine is inserted into the front muffler 1A in the exhaust muffler 41 through an opening in the front end face, and a pipe 43, a rear muffler 1C, and a pipe 44 are provided. , Middle silencer 1B, tail pipe 45
The exhaust gas is exhausted through the order. Exhaust muffler 5
In FIG. 1, the extension pipe 5 of the exhaust pipe from the engine as shown in FIG.
2 is inserted into the exhaust muffler 51 from the opening on the front end face,
Although connected to the rear silencer chamber 1C, a small-diameter pipe-shaped catalyst portion 53 concentric with the extension tube 52 and arranged in front and rear of the extension tube 52 is provided with annular mounting brackets 54 and 55 interposed therebetween. Reference numerals 56 and 57 denote intermediate pipes, and reference numeral 58 denotes a tail pipe. Exhaust gas flowing into the rear silencer 1C passes through the front silencer 1A and the middle silencer 1B, and is discharged by the tailpipe 58. You. In addition, the pipe type catalyst unit 5
Reference numeral 3 denotes a pipe having a large number of punching holes, on which a catalyst material such as platinum is supported by a method such as dipping.
【０００５】[0005]
【発明が解決しようとする課題】上記の公報に記載の従
来の排気マフラーでは、次のような点で改良すべき余地
がある。すなわち、 上記した従来の触媒付き排気マフラーは、排気管内
にパイプ形触媒部を配置する構造からなるので、パイプ
形触媒部によって排気管内の排気ガス流通路が内側と外
側の環状部分の二重構造になり、内側の開口面積が狭く
なり、全体としてガス流通抵抗が大きくなる。このた
め、実質的に排気管の口径が縮小された状態になり、エ
ンジンの性能に影響を及ぼすおそれがある。一方、パイ
プ形触媒部の影響をなくすために排気管の口径を大きく
すると、排気管の製作が困難になるうえに、排気管の一
部だけが外径が変わるので、外観上から体裁が悪い。The conventional exhaust muffler described in the above publication has room for improvement in the following points. That is, since the above-described conventional exhaust muffler with a catalyst has a structure in which a pipe-shaped catalyst portion is disposed in an exhaust pipe, the exhaust gas flow passage in the exhaust pipe is formed by the pipe-shaped catalyst portion in a double structure of an inner and an outer annular portion. , The opening area on the inside is reduced, and the gas flow resistance is increased as a whole. For this reason, the diameter of the exhaust pipe is substantially reduced, which may affect the performance of the engine. On the other hand, if the diameter of the exhaust pipe is increased in order to eliminate the influence of the pipe-shaped catalyst part, it becomes difficult to manufacture the exhaust pipe, and only a part of the exhaust pipe changes its outer diameter, so that appearance is poor from the appearance. .
【０００６】 上記触媒付き排気マフラーは、排気マ
フラー内にメインの触媒部を備えており、パイプ形触媒
部を予加熱用に使用しているので、２種類の触媒装置を
ここに配置する必要があり、構造が複雑になって製造に
手間がかかるうえに、製造コストが高くなる。In the exhaust muffler with a catalyst, a main catalyst portion is provided in the exhaust muffler, and a pipe-type catalyst portion is used for preheating. Therefore, it is necessary to arrange two types of catalyst devices here. In addition, the structure becomes complicated and it takes time to manufacture, and the manufacturing cost increases.
【０００７】 取付スペース等の関係から、たとえば
排気マフラーの側周面の前部に排気管を接続する必要が
ある場合に、排気マフラーより上流側の排気管にパイプ
形触媒部を配置すると、触媒部通過後の排気ガスの温度
が上昇するので、排気マフラーの入口（接続部）付近の
排気管に断熱手段を施す必要があり、構造が益々複雑に
なる。For example, when it is necessary to connect an exhaust pipe to a front portion of a side peripheral surface of an exhaust muffler due to a mounting space or the like, if a pipe-shaped catalyst portion is disposed in an exhaust pipe upstream of the exhaust muffler, the catalyst Since the temperature of the exhaust gas after passing through the section rises, it is necessary to provide heat insulating means to the exhaust pipe near the entrance (connection) of the exhaust muffler, and the structure becomes more and more complicated.
【０００８】本発明は上述の課題を解決するためになさ
れたもので、パイプ形触媒部を用いて排気ガスを浄化す
る排気マフラーにおいて、排気ガスの流路抵抗が増大す
るという問題を解決してエンジンの性能低下を阻止する
こと、さらにエンジンの性能低下を阻止したうえで、排
気ガスの浄化率を向上すること、排気マフラー内にパイ
プ形触媒部を設けることにより、排気マフラーに接続さ
れる排気管の断熱対策を不要にすること、取付スペース
上から排気マフラーの前部側面から排気管を接続する必
要がある場合でも、確実にかつ美観を損なうことなく接
続することを可能にし、出力の向上を図れる自動二輪車
等に用いられる触媒付き排気マフラーを提供することを
目的としている。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has solved the problem that the exhaust gas flow path resistance increases in an exhaust muffler for purifying exhaust gas using a pipe-type catalyst portion. Exhaust connected to the exhaust muffler by preventing a decrease in engine performance, further improving the exhaust gas purification rate while preventing the engine performance from decreasing, and providing a pipe-type catalyst section in the exhaust muffler Eliminates the need for thermal insulation of the pipes, improves the output even if it is necessary to connect the exhaust pipe from the front side of the exhaust muffler from the mounting space, without sacrificing the appearance. It is an object of the present invention to provide a catalyst-equipped exhaust muffler used for a motorcycle or the like that can achieve the above-mentioned requirements.
【０００９】[0009]
【課題を解決するための手段】上記の目的を達成するた
めに請求項１に係る発明は、a)内部を長手方向に間隔を
あけて仕切壁部材により複数の消音室に区画し、該消音
室間を前記仕切壁部材を貫通する連通管で接続した触媒
付き排気マフラーにおいて、b)前記排気マフラー内に配
設され、エンジンからの排気管に直接に接続する第１の
連通管の少なくとも一部を、該連通管と同一口径のパイ
プ形触媒部で形成している。Means for Solving the Problems To achieve the above object, the invention according to claim 1 includes: a) partitioning the inside into a plurality of sound deadening chambers by a partition member at intervals in a longitudinal direction; An exhaust muffler with a catalyst connected between the chambers by a communication pipe penetrating the partition wall member; b) at least one of a first communication pipe disposed in the exhaust muffler and directly connected to an exhaust pipe from an engine. The part is formed by a pipe-shaped catalyst part having the same diameter as the communication pipe.
【００１０】上記の構成を有する請求項１に係る発明に
よれば、パイプ形触媒部が排気マフラー内に配置されて
いるために、排気ガスが流通してパイプ形触媒部（たと
えば酸化触媒の場合）が加熱されても、排気マフラーの
周壁には通常、グラスウールなどの断熱吸音材が介装さ
れるなどあらかじめ断熱対策が施されているため、排気
マフラーに特別に断熱手段を施す必要がない。また、エ
ンジンの排気ポートからの排気管の終端側が、排気マフ
ラー内の第１の（入口に最も近い）連通管に直接に接続
されるが、排気管および連通管の口径（内径）の大きさ
の変化は排気慣性や排気ガスの流通抵抗などに影響を与
えるため、エンジンの性能に関連してくる。そこで、本
発明では、排気管に直接に接続される連通管の口径を排
気管とほぼ同一径にするのはもとより、パイプ形触媒部
のパイプの口径も連通管、いいかえれば排気管とほぼ同
一径にしてパイプ形触媒部で排気ガスの流通抵抗（排気
抵抗）が変化（増加）するのを回避している。この結
果、上記した従来の排気管内にパイプ形触媒部を配置し
た排気マフラーと違ってエンジンの性能の低下が生じ
ず、しかも排気ガスの触媒による浄化率も同等もしくは
それ以上に優れたものになる。According to the first aspect of the present invention having the above structure, since the pipe-type catalyst portion is disposed in the exhaust muffler, the exhaust gas flows and the pipe-type catalyst portion (for example, in the case of an oxidation catalyst). Even if the exhaust muffler is heated, the exhaust muffler does not need to be specially insulated because the peripheral wall of the exhaust muffler is usually preliminarily provided with a heat insulating sound absorbing material such as glass wool. Also, the end side of the exhaust pipe from the exhaust port of the engine is directly connected to the first (closest to the inlet) communication pipe in the exhaust muffler, but the size of the diameter (inner diameter) of the exhaust pipe and the communication pipe is large. Changes affect exhaust performance, such as the inertia of the exhaust gas and the flow resistance of the exhaust gas. Therefore, in the present invention, the diameter of the communication pipe directly connected to the exhaust pipe is made substantially the same as the diameter of the exhaust pipe, and the diameter of the pipe of the pipe-shaped catalyst portion is also substantially the same as the diameter of the communication pipe, in other words, the exhaust pipe. The change in the flow resistance (exhaust resistance) of the exhaust gas in the pipe-shaped catalyst portion in the diameter is avoided (increased). As a result, unlike the conventional exhaust muffler in which the pipe-shaped catalyst portion is disposed in the exhaust pipe, the performance of the engine does not decrease, and the purification rate of the exhaust gas by the catalyst is equal to or more excellent. .
【００１１】請求項２記載のように、前記パイプ形触媒
部を、c)多数のパンチ孔を有するパンチングプレート製
パイプに白金およびロジウムなどの触媒素材を担持した
有孔内筒と、この有孔内筒の周囲を取り囲むように被装
した無孔外筒と、この無孔外筒と前記有孔内筒との間に
介装するステンレスウールなどの耐熱性吸音材とから構
成することができる。According to a second aspect of the present invention, the pipe-shaped catalyst portion comprises: c) a perforated inner cylinder in which a catalyst material such as platinum and rhodium is supported on a punched plate pipe having a large number of punched holes; It can be composed of a non-perforated outer cylinder covered so as to surround the inner cylinder, and a heat-resistant sound-absorbing material such as stainless steel wool interposed between the non-perforated outer cylinder and the perforated inner cylinder. .
【００１２】請求項２記載の発明によれば、排気マフラ
ー内の連通管（パイプ）あるいはその一部がパイプ形触
媒部をなすから、排気ガスが連通管を通過する際にパイ
プ形触媒部で排気ガスの流通抵抗が変化し排気抵抗が増
加することがなく、スムーズに通過するので、エンジン
の性能の低下が起こらない。また、排気ガスは有孔内筒
（パンチングプレート製パイプ）内を通過する際に、白
金やロジウムなどの酸化触媒の場合には接触して加熱さ
れ、主に未燃焼成分などが酸化されるので、排気ガスが
浄化される。しかも、有孔内筒の外側のステンレスウー
ルなどの耐熱性吸音材が高周波ノイズを吸収して外部へ
の伝播を抑制するから、消音効果も高く、また耐熱性吸
音材により有孔内筒からの熱が仕切壁部材を介して排気
マフラーの周壁へ伝わるのが防止される。According to the second aspect of the present invention, since the communication pipe (pipe) in the exhaust muffler or a part of the communication pipe (pipe) forms a pipe-shaped catalyst section, the exhaust gas passes through the pipe-shaped catalyst section when passing through the communication pipe. The flow resistance of the exhaust gas does not change and the exhaust resistance does not increase, and the exhaust gas passes smoothly, so that the performance of the engine does not decrease. Also, when the exhaust gas passes through a perforated inner cylinder (punched plate pipe), in the case of an oxidation catalyst such as platinum or rhodium, it is heated by contact, and mainly unburned components are oxidized. The exhaust gas is purified. In addition, the heat-resistant sound absorbing material such as stainless steel wool outside the perforated inner cylinder absorbs high-frequency noise and suppresses the propagation to the outside. Heat is prevented from being transmitted to the peripheral wall of the exhaust muffler through the partition wall member.
【００１３】請求項３記載のように、前記パイプ形触媒
部を、d)多数のパンチ孔を有するパンチングプレート製
パイプに白金およびロジウムなどの触媒素材を担持した
有孔内筒と、この有孔内筒の周囲を取り囲むように被装
した無孔外筒と、この無孔外筒と前記有孔内筒との間に
介在する密閉環状空間部とから構成することが好まし
い。なお、請求項２の触媒素材も含めて、触媒素材とは
白金やロジウムのほか、パナジウム、銅、マンガンなど
の種々の金属や金属酸化物をいい、本発明における触媒
とは酸化触媒や還元触媒、三次元触媒などを含む。According to a third aspect of the present invention, the pipe-shaped catalyst section comprises: d) a perforated inner cylinder in which a catalyst material such as platinum and rhodium is carried on a punched plate pipe having a large number of punched holes; It is preferable to comprise a non-porous outer cylinder mounted so as to surround the inner cylinder, and a closed annular space interposed between the non-porous outer cylinder and the perforated inner cylinder. The catalyst material, including the catalyst material of claim 2, refers to various metals and metal oxides such as platinum, rhodium, panadium, copper, and manganese. The catalyst in the present invention is an oxidation catalyst or a reduction catalyst. , Three-dimensional catalysts and the like.
【００１４】請求項３記載の発明によれば、請求項２記
載の発明と同様に排気ガスがパイプ形触媒部を通過する
際の流路抵抗が連通管や排気管の通過時とほとんど変わ
らないから、エンジンの性能が低下しない。また、排気
ガスは有孔内筒内を通過する際にその表面（内周面）の
白金やロジウムなどと接触すると同時に、多数のパンチ
孔を通って外側の環状空間部と有孔内筒内とも行き来す
るので、排気ガスは有孔内筒の内周面だけでなく外周面
に担持されている白金やロジウムなどとも接触して浄化
されるために、請求項２の排気マフラーに比べて排気ガ
スの浄化率が大幅に向上する。一方、請求項２の場合と
違って環状空間部に耐熱性吸音材が介装されていない
が、触媒がが酸化触媒の場合に排気ガスと接触して発熱
するのは有孔内筒だけで、密閉された環状空間部を挟ん
で無孔外筒（パイプ）で取り囲まれているので、仕切壁
部材を介して排気マフラーの側周面に伝達されにくい。
また排気マフラーの側周面にはグラスウールなどの断熱
性吸音材を介装して、断熱作用が発揮されるようにして
いる。According to the third aspect of the invention, similarly to the second aspect of the invention, the flow path resistance when the exhaust gas passes through the pipe-shaped catalyst portion is almost the same as when the exhaust gas passes through the communication pipe or the exhaust pipe. Therefore, the performance of the engine does not decrease. Also, when the exhaust gas passes through the perforated inner cylinder, it comes into contact with platinum or rhodium on its surface (inner peripheral surface), and at the same time, passes through a large number of punch holes to form an outer annular space and the perforated inner cylinder. Since the exhaust gas comes into contact with not only the inner peripheral surface of the perforated inner cylinder but also platinum and rhodium carried on the outer peripheral surface thereof and is purified, the exhaust gas is more exhausted than the exhaust muffler of claim 2. The gas purification rate is greatly improved. On the other hand, unlike the case of claim 2, no heat-resistant sound-absorbing material is interposed in the annular space, but when the catalyst is an oxidation catalyst, only the perforated inner cylinder generates heat by contact with the exhaust gas. Since it is surrounded by the non-porous outer cylinder (pipe) with the sealed annular space interposed therebetween, it is difficult to transmit to the side peripheral surface of the exhaust muffler via the partition wall member.
Further, a heat insulating sound absorbing material such as glass wool is interposed on the side peripheral surface of the exhaust muffler so that a heat insulating effect is exhibited.
【００１５】請求項４記載のように、前記排気マフラー
の側周面の前部に前記排気管の先端部を挿入するための
開口を設けるとともに、該開口の口径を前記排気管の外
径よりもやや大きく形成したうえ、前記排気管先端部の
前記開口対応位置の周囲には外向きのフランジを溶接
し、前記開口を設けた消音室内に位置する前記第１連通
管の端部を、その一端開口が前記排気マフラー側周面の
前記開口に相対向するように屈曲させ、前記排気管の先
端部を直管状に形成し、前記連通管屈曲部の一端開口部
内にほぼ直交するように軽圧入したのち、前記フランジ
の外周部を前記排気マフラーの側周面の開口の周囲に溶
接し、前記開口と排気管先端部との隙間を前記フランジ
で覆うことができる。According to a fourth aspect of the present invention, an opening for inserting a tip portion of the exhaust pipe is provided at a front portion of a side peripheral surface of the exhaust muffler, and the diameter of the opening is larger than the outer diameter of the exhaust pipe. After being formed slightly larger, an outward flange is welded around the position corresponding to the opening at the end of the exhaust pipe, and the end of the first communication pipe located in the sound deadening chamber provided with the opening, The one end opening is bent so as to face the opening on the exhaust muffler side peripheral surface, the tip of the exhaust pipe is formed in a straight tubular shape, and the light end is formed so as to be substantially orthogonal to the one end opening of the communication pipe bent part. After the press-fitting, the outer peripheral portion of the flange is welded around an opening on the side peripheral surface of the exhaust muffler, and the gap between the opening and the distal end of the exhaust pipe can be covered with the flange.
【００１６】請求項４記載の発明によれば、エンジンか
らの排気管長さの調整（延長）や取付スペース等の関係
で排気マフラーの前面に排気管を接続できず、マフラー
側周面の前部に接続しなければならない場合に、開口か
らマフラー内に挿入した排気管の直管状先端部を、あら
かじめマフラー内（の仕切壁部材）に固定された連通管
の屈曲部の一端開口部内に、ほぼ直交するように軽圧入
させられるので、堅固に接続できるとともに、治具など
を用いて両者の位置の調整を行って連通管屈曲部の一端
開口がマフラー本体の開口に対し真っ正面を向くように
し、この状態で排気管の直管状先端部を開口よりマフラ
ー本体内に挿入し、軽圧入させることができる。このた
め、排気管と連通管の位置合わせが正確に行えるととも
に、排気管の直管状先端部を連通管屈曲部の一端開口に
直交あるいはほぼ直交するように軽圧入して接続でき
る。また開口と排気管の先端部との間に設けられた隙間
は、フランジで覆うことにより閉塞することができると
ともに、上記のようにして接続される排気マフラーに対
する排気管の状態は、排気マフラーに対し排気管が堅固
に接続され、しかも開口がフランジで覆われ、排気マフ
ラーと排気管との接続箇所が最小限に抑えられる。この
ため、排気管の接続箇所を排気マフラーの裏面に配置す
るだけで簡単に隠せる。そして、言うまでもないが、排
気管から排気マフラー内に流入した排気ガスがパイプ形
触媒部を通過し浄化されるなどの作用は、請求項１〜３
の発明と同様に発揮される。According to the fourth aspect of the present invention, the exhaust pipe cannot be connected to the front of the exhaust muffler due to the adjustment (extension) of the length of the exhaust pipe from the engine and the mounting space, etc. When it must be connected to the muffler, the straight tubular tip of the exhaust pipe inserted into the muffler from the opening is inserted into one end opening of the bent part of the communication pipe fixed in advance in the muffler (partition wall member). Since it is lightly press-fitted perpendicularly, it can be firmly connected and adjust the position of both using a jig etc. so that the one end opening of the communicating pipe bent part is directly facing the opening of the muffler body. In this state, the straight tubular distal end of the exhaust pipe can be inserted into the muffler main body through the opening and lightly press-fitted. For this reason, the positioning of the exhaust pipe and the communication pipe can be accurately performed, and the straight pipe end of the exhaust pipe can be lightly press-fitted and connected to the one end opening of the communication pipe bent portion so as to be orthogonal or substantially orthogonal. The gap provided between the opening and the end of the exhaust pipe can be closed by covering it with a flange, and the state of the exhaust pipe with respect to the exhaust muffler connected as described above is changed to the exhaust muffler. On the other hand, the exhaust pipe is firmly connected, and the opening is covered with a flange, so that the connection point between the exhaust muffler and the exhaust pipe is minimized. For this reason, the connection point of the exhaust pipe can be easily hidden simply by arranging it on the back surface of the exhaust muffler. And, needless to say, the action of purifying the exhaust gas flowing into the exhaust muffler from the exhaust pipe through the pipe-type catalyst portion is described in claims 1 to 3.
The present invention is exerted in the same manner as the invention.
【００１７】[0017]
【発明の実施の形態】以下、本発明に係る排気マフラー
の実施の形態を図面に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an exhaust muffler according to the present invention will be described below with reference to the drawings.
【００１８】図１は本発明の実施例に係る自動二輪車の
排気マフラーを示す平面視断面図、図２は図１のII−II
線断面図である。FIG. 1 is a sectional plan view showing an exhaust muffler of a motorcycle according to an embodiment of the present invention. FIG. 2 is a sectional view taken along the line II-II of FIG.
It is a line sectional view.
【００１９】図１に示すように、排気マフラー１は前端
から後端にかけて外径を漸次増大した略円筒形で、アウ
ターボディ２とインナーボディ３と両ボディ２・３間に
介装される断熱吸音材としてのグラスウール４とからな
る。アウターボディ２は前端が開口し、この開口１３に
かなり口径の大きいダミーの排気管１３Ａが接続されて
おり、アウターボディ２は本例ではダミーの排気管１３
Ａとともに表面にクロームメッキを施した鉄製（SPCC）
の略円筒体からなる。インナーボディ３は前端が二重の
前端壁１４で閉塞されたパンチングメタル（鉄材）製の
略円筒体からなり、内部は仕切り壁部材（バッフルプレ
ートともいう）５・６により、一応は前部消音室（膨張
室）１Ａ（図６参照）、中間消音室（膨張室）１Ｂ（図
６参照）、後部消音室（膨張室）１Ｃ（図６参照）の３
室に区画されているが、仕切壁部材５には連通口（図示
せず）を設け、前部消音室１Ａと中間消音室１Ｂとは連
通させて共通の消音室（膨張室）１Ａ’に形成してあ
る。各仕切り壁部材５・６は薄い円板の外周縁部５ａ・
６ａを後方へ屈折させて形成され、インナーボディ３の
内周壁にスポット溶接等により固着されている。As shown in FIG. 1, the exhaust muffler 1 has a substantially cylindrical shape whose outer diameter gradually increases from the front end to the rear end, and is provided with an outer body 2, an inner body 3, and a heat insulating material interposed between the two bodies 2, 3. Glass wool 4 as a sound absorbing material. The front end of the outer body 2 is opened, and a dummy exhaust pipe 13A having a considerably large diameter is connected to the opening 13. The outer body 2 is a dummy exhaust pipe 13 in this example.
Made of chrome-plated iron with A (SPCC)
Consists of a substantially cylindrical body. The inner body 3 is made of a substantially cylindrical body made of punched metal (iron material) whose front end is closed by a double front end wall 14, and the inside is divided by partition wall members (also referred to as baffle plates) 5 and 6, and the front part is silenced at first A chamber (expansion chamber) 1A (see FIG. 6), an intermediate silence chamber (expansion chamber) 1B (see FIG. 6), and a rear silence chamber (expansion chamber) 1C (see FIG. 6).
The partition wall member 5 is provided with a communication port (not shown) in the partition wall member 5 so that the front noise reduction chamber 1A and the intermediate noise reduction chamber 1B communicate with each other to form a common noise reduction chamber (expansion chamber) 1A '. It is formed. Each of the partition wall members 5 and 6 has an outer peripheral edge 5a of a thin disk.
6a is formed by bending the rear portion 6a backward, and is fixed to the inner peripheral wall of the inner body 3 by spot welding or the like.
【００２０】仕切り壁部材６には、図２のように、貫通
孔６ｂのほか、貫通孔６ｃ・６ｄがそれぞれ穿設され、
貫通孔６ｃには別のパイプ８が貫通して溶接等により固
着され、第１室の後部消音室１Ｃと第２室の中間消音室
１Ｂが接続されている。また図１に示すように貫通孔６
ｄには、長尺のテールパイプ９の前部９ａが貫通して溶
接等により固着されたのちに、テールパイプ９の後部９
ｃを後端壁１０の中央貫通孔１０ｂより後方へ突出させ
た状態で、後端壁１０の外周縁部１０ａを前方へ屈折
し、インナーボディ３の後端開口部内に嵌挿される。テ
ールパイプ９の後端部は位置決めされたあと、後端壁１
０の中央貫通孔１０ｂに溶接により固着される。テール
パイプ９は、傾斜した中間パイプ９ｂを挟んで排気マフ
ラー１の中心軸と平行な前部パイプ９ａと後部パイプ９
ｃとをそれぞれ平行に一体に接続した構造で、中間パイ
プ９ｂの中間部分はパンチ孔９ｅが多数穿設され、その
周囲にグラスウール１２が巻装され、グラスウール１２
の周囲に無孔のパイプ１１が被装されている。As shown in FIG. 2, the partition wall member 6 is provided with through holes 6c and 6d in addition to the through hole 6b.
Another pipe 8 penetrates through hole 6c and is fixed by welding or the like, and is connected to a rear silencer 1C of the first chamber and an intermediate silencer 1B of the second chamber. Also, as shown in FIG.
d, a front portion 9a of the long tail pipe 9 is penetrated and fixed by welding or the like, and then a rear portion 9a of the tail pipe 9 is formed.
The outer peripheral edge 10a of the rear end wall 10 is bent forward in a state where c is projected rearward from the central through hole 10b of the rear end wall 10, and is fitted into the rear end opening of the inner body 3. After the rear end of the tail pipe 9 is positioned, the rear end wall 1
0 is fixed to the center through hole 10b by welding. The tail pipe 9 has a front pipe 9a and a rear pipe 9 parallel to the central axis of the exhaust muffler 1 with the inclined intermediate pipe 9b interposed therebetween.
c are integrally connected in parallel with each other, and a large number of punch holes 9e are formed in an intermediate portion of the intermediate pipe 9b, and a glass wool 12 is wound therearound.
A non-porous pipe 11 is provided around the periphery of the pipe.
【００２１】アウターボディ２の側周壁の前部とインナ
ーボディ３の側周壁の前部には、それぞれ一連に連通す
る開口２ａ・３ａがあらかじめ穿設されている。本例で
は４サイクルのＶ型２気筒エンジン（図示せず）の排気
ポートに一端が接続され、排気マフラー１に接続される
排気管（図示せず）の接続管１５の先端部１６は直管状
に形成し、先端部１６の外径をそれらの開口２ａ・３ａ
の口径よりやや外径を小さく設定してある。この先端部
１６の基端部付近の外周には、中央部を開口した円板状
のフランジ１７が溶接により一体的に固着されている。
接続管１５の中間部を構成する継手１５Ａは略直角に屈
曲され、内側のパイプ１５ａには多数のパンチ孔１５ｅ
が穿設されており、その周囲を取り囲むように無孔の略
直角に屈曲されたパイプカバー１５ｂが被装されてい
る。接続管１５の基部１５Ｂは切込み１５ｃを設けた拡
径部１５ｄを備え、この拡径部１５ｄの基端は開口され
ており、エンジンからの排気管を嵌挿することにより容
易に接続できるようになっている。Openings 2a and 3a are formed in the front part of the side peripheral wall of the outer body 2 and the front part of the side peripheral wall of the inner body 3, respectively. In this example, one end is connected to an exhaust port of a 4-cycle V-type two-cylinder engine (not shown), and a distal end portion 16 of a connection pipe 15 of an exhaust pipe (not shown) connected to the exhaust muffler 1 is a straight tube. And the outer diameter of the distal end portion 16 is adjusted to those openings 2a and 3a.
The outer diameter is set slightly smaller than the diameter of. A disk-shaped flange 17 having an open central portion is integrally fixed to the outer periphery of the distal end portion 16 near the base end portion by welding.
The joint 15A constituting the intermediate portion of the connection pipe 15 is bent at a substantially right angle, and a number of punch holes 15e are formed in the inner pipe 15a.
And a non-porous pipe cover 15b bent at a substantially right angle so as to surround the periphery thereof. The base 15B of the connecting pipe 15 has an enlarged diameter portion 15d provided with a cut 15c, and the proximal end of the enlarged diameter portion 15d is open so that the exhaust pipe from the engine can be easily connected by insertion. Has become.
【００２２】接続管１５の先端部１６を接続する連通管
２１は長尺でかつ口径が接続管１５とほぼ同一で、排気
マフラー１内の前部消音室１Ａ’から後部消音室１Ｃに
跨がって２つの仕切り壁部材５・６を貫通して設けら
れ、後部消音室１Ｃを第１室としている。また排気マフ
ラー１内で接続管１５の先端部１６をパイプ２１に接続
する必要があるため、上記したとおり先端部１６を直管
状に形成し、パイプ２１に略直角に屈曲した継手２２を
一体に接続し、直管状の先端部１６が継手２２の接続口
２２Ａに直交するように設計している。この構成に加え
てさらに、接続口２２Ａの口径は先端部１６の外径より
僅かに大きくし、開口端を全周にわたりわずかに外向き
に広げ、先端部１６が容易に軽圧入できるようにしてい
る。また、先端部１６と継手２２の材質も異ならせて、
つまり継手２２のとくに接続口部２２Ｂは鉄材（SPCC）
で形成し、先端部１６は鉄材に比べて熱膨張率の大きい
オーステナイト系ステンレス材（ＳＵＳ３０４）で形成
している。The communication pipe 21 for connecting the distal end portion 16 of the connection pipe 15 is long and has substantially the same diameter as the connection pipe 15, and extends from the front silencer chamber 1A 'in the exhaust muffler 1 to the rear silencer chamber 1C. Accordingly, the rear silencer 1C is defined as a first chamber provided through the two partition wall members 5 and 6. In addition, since it is necessary to connect the distal end portion 16 of the connection pipe 15 to the pipe 21 in the exhaust muffler 1, the distal end portion 16 is formed in a straight tubular shape as described above, and the pipe 22 is integrally formed with the joint 22 bent at a substantially right angle. The joint is designed so that the straight tubular tip 16 is orthogonal to the connection port 22A of the joint 22. In addition to this configuration, the diameter of the connection port 22A is slightly larger than the outer diameter of the distal end portion 16, and the opening end is slightly outwardly spread over the entire circumference so that the distal end portion 16 can be easily lightly pressed. I have. Also, by making the material of the tip portion 16 and the joint 22 different,
That is, the connection port 22B of the joint 22 is made of iron material (SPCC).
The tip portion 16 is formed of an austenitic stainless steel (SUS304) having a larger coefficient of thermal expansion than an iron material.
【００２３】なお、継手２２は接続管１５の継手１５Ａ
と共通の構造からなり、内側のパイプ２２ａには多数の
パンチ孔２２ｅが穿設されており、その周囲を取り囲む
ように無孔の略直角に屈曲されたパイプカバー２２ｂが
被装されている。なお、継手２２のうちパイプカバー２
２ｂだけは鉄材に比べて熱膨張率の大きいオーステナイ
ト系ステンレス材（ＳＵＳ３０４）で形成している。ま
た、接続口２２Ａを形成する接続口部２２Ｂは他の部分
に比べてやや拡径されている。The joint 22 is a joint 15A of the connecting pipe 15.
A plurality of punch holes 22e are formed in the inner pipe 22a, and a non-perforated pipe cover 22b bent at a substantially right angle is provided so as to surround the periphery thereof. The pipe cover 2 of the joint 22
Only 2b is formed of an austenitic stainless steel (SUS304) having a larger coefficient of thermal expansion than an iron. The connection port 22B forming the connection port 22A is slightly larger in diameter than other portions.
【００２４】連通管２１は本発明の特徴部分をなすもの
で、前端部と後端部を除きパイプ形触媒部からなる。す
なわち、連通管２１は前後端部２１ａ・２１ｂを除き、
多数のパンチ（パンチング）孔２１ｃを有するパンチン
グプレートからなるステンレス（ＳＵＳ）製パイプに白
金およびロジウムを担持した有孔内筒２１Ａと、この有
孔内筒２１Ａの周囲を取り囲むように被装されるステン
レス（ＳＵＳ）製の無孔外筒２１Ｂと、この無孔外筒２
１Ｂと有孔内筒２１Ａの間に介装する耐熱性吸音材とし
てのステンレスウール２１Ｃとから構成されている。有
孔内筒２１Ａの前端部２１ａは図１のように、継手２２
の後端開口に応じてわずかに口径を漸次拡大した形状か
らなり、無孔外筒２１Ｂの前端が継手２２の後端開口ま
で延び、有孔内筒２１Ａの前端部２１ａの周囲を覆って
いる。一方、有孔内筒２１Ａの後端部２１ｂは無孔外筒
２１Ｂの後端から後方へ露出している。なお、本例の場
合、白金およびロジウムなどの溶解された溶液中に、パ
ンチングプレートをディッピングすることにより触媒素
材を担持している。The communication pipe 21 is a characteristic part of the present invention, and is formed of a pipe-shaped catalyst except for a front end and a rear end. That is, the communication pipe 21 except for the front and rear ends 21a and 21b,
A perforated inner cylinder 21A carrying platinum and rhodium on a stainless steel (SUS) pipe made of a punching plate having a number of punched (punched) holes 21c, and is provided so as to surround the perimeter of the perforated inner cylinder 21A. Non-porous outer cylinder 21B made of stainless steel (SUS) and this non-porous outer cylinder 2B
1B and stainless steel wool 21C as a heat-resistant sound absorbing material interposed between the perforated inner cylinder 21A. The front end 21a of the perforated inner cylinder 21A is, as shown in FIG.
The front end of the non-perforated outer cylinder 21B extends to the rear end opening of the joint 22, and covers the periphery of the front end 21a of the perforated inner cylinder 21A. . On the other hand, the rear end 21b of the perforated inner cylinder 21A is exposed rearward from the rear end of the non-perforated outer cylinder 21B. In the case of this example, the catalyst material is supported by dipping a punching plate in a solution in which platinum, rhodium, or the like is dissolved.
【００２５】さらに、本例ではＶ型２気筒４サイクルエ
ンジンの前後の排気ポート（排気口）に排気管がそれぞ
れ接続され、それらの２本の排気管が集合されて共通の
排気管として排気マフラー１に接続されているが、排気
管の集合部から有孔内筒２１Ａの先端まで含めた排気管
の連続部分の長さを延長することによって、排気慣性等
の改善によるエンジンの出力向上が図られている。いい
かえれば、排気マフラー１内の後部消音室１Ｃを第１室
にし、排気マフラー１内の連通管２１を排気管の延長管
として利用したことで、図５に一点鎖線で示すように排
気管延長前の状態でトルクカーブｔの途中に生じていた
トルク谷Ｂが消え、右上がりの滑らかなトルクカーブ
ｔ’になった。Further, in this embodiment, exhaust pipes are respectively connected to exhaust ports (exhaust ports) at the front and rear of the V-type two-cylinder four-cycle engine, and these two exhaust pipes are assembled to form an exhaust muffler as a common exhaust pipe. 1, but by increasing the length of the continuous portion of the exhaust pipe from the gathering portion of the exhaust pipe to the tip of the perforated inner cylinder 21A, it is possible to improve the output of the engine by improving the exhaust inertia and the like. Have been. In other words, the rear muffling chamber 1C in the exhaust muffler 1 is made the first chamber, and the communication pipe 21 in the exhaust muffler 1 is used as an extension pipe of the exhaust pipe, so that the exhaust pipe is extended as shown by a dashed line in FIG. The torque valley B generated in the middle of the torque curve t in the previous state has disappeared, and a smooth torque curve t 'rising to the right has been obtained.
【００２６】また、接続管１５の先端部１６と排気マフ
ラー１内の連通管２１の継手２２の接続口２２Ａとの接
続は、接続管先端部１６を開口２ａ・３ａよりマフラー
１の中心軸線に対しほぼ直交する角度で真っすぐに挿入
することにより、簡単にかつ正確に位置合わせされ、遂
行された。なお、継手２２の接続口２２Ａについて微妙
な位置の調節や向きの調節は、アウターボディ２内でイ
ンナーボディ３を前後方向に摺動したり回転したりする
ことにより行えるとともに、開口２ａ・３ａの口径を排
気管先端部１６の外径よりもわずかに大きく形成してい
ることにより、排気管先端部１６の向きも自由に調節で
きることから、正確にかつ確実に位置合わせされる。そ
して、最終的に、円板形のフランジ１７の外周縁部をア
ウターボディ２の外周面に溶接することによりエンジン
からの排気管の接続作業が終了する。The connection between the distal end 16 of the connection pipe 15 and the connection port 22A of the joint 22 of the communication pipe 21 in the exhaust muffler 1 is performed by connecting the distal end 16 of the connection pipe to the central axis of the muffler 1 through the openings 2a and 3a. Easy and accurate alignment and accomplishment was achieved by straight insertion at an angle approximately orthogonal to that. The position and direction of the connection port 22A of the joint 22 can be finely adjusted by sliding or rotating the inner body 3 in the outer body 2 in the front-rear direction. Since the diameter is slightly larger than the outer diameter of the exhaust pipe tip 16, the direction of the exhaust pipe tip 16 can be freely adjusted, so that accurate and reliable alignment is achieved. Finally, the outer peripheral edge of the disc-shaped flange 17 is welded to the outer peripheral surface of the outer body 2 to complete the connection of the exhaust pipe from the engine.
【００２７】上記のように構成された本実施例の排気マ
フラー１によれば、エンジンの前後の各排気ポートから
排気管を通って集合され、共通の排気管を通って排出さ
れる排気ガスは、接続管１５の先端部１６から連通管２
１を通って第１消音室としての後部消音室１Ｃに導入さ
れたのち、パイプ８を通って中間消音室１Ｂ（図６）お
よび前部消音室１Ａ（図６）からなる第２消音室１Ａ’
内に入り、後端のテールパイプ９から外部へ排出され
る。この間に、排気ガス中の未燃焼成分などは有孔内筒
２１Ａに担持された白金およびロジウムと接触し酸化さ
れるなどして浄化され、またパイプ８を通って第２消音
室１Ａ’内に入りテールパイプ９から外部へ排出される
間に排気ガスが膨張・収縮して消音されるとともに、排
気ガス温度も低下する。According to the exhaust muffler 1 of the present embodiment configured as described above, the exhaust gas collected from each exhaust port before and after the engine through the exhaust pipe and discharged through the common exhaust pipe is From the distal end portion 16 of the connection pipe 15 to the communication pipe 2
After passing through 1 to the rear silencer 1C as the first silencer, it passes through the pipe 8 to form the second silencer 1A comprising the middle silencer 1B (FIG. 6) and the front silencer 1A (FIG. 6). '
And is discharged to the outside through the tail pipe 9 at the rear end. During this time, the unburned components and the like in the exhaust gas come into contact with the platinum and rhodium supported on the perforated inner cylinder 21A and are purified by oxidation and the like, and pass through the pipe 8 into the second silencing chamber 1A '. The exhaust gas expands and contracts while being exhausted from the tail pipe 9 to the outside, so that the sound is reduced and the temperature of the exhaust gas is reduced.
【００２８】次に、本発明の排気マフラーの第２実施例
について図面に基づいて説明する。Next, a second embodiment of the exhaust muffler of the present invention will be described with reference to the drawings.
【００２９】図３は排気マフラーの第２実施例を示す平
面視断面図、図４は図３のパイプ形触媒部を拡大して示
す一部を切り欠いた斜視図である。FIG. 3 is a plan sectional view showing a second embodiment of the exhaust muffler, and FIG. 4 is a partially cutaway perspective view showing an enlarged view of the pipe-shaped catalyst portion of FIG.
【００３０】本例の排気マフラー１’が上記実施例と相
違するところは、パイプ形触媒部の構造である。図３・
図４に示すように、本例の連通管２１’においては、多
数のパンチ孔２１ｃを有するパンチングプレートからな
るステンレス製パイプに白金およびロジウムを担持した
有孔内筒２１Ａの周囲を取り囲むように、ステンレス製
の無孔外筒（孔無しパイプ）２１Ｂを被装し、内筒２１
Ａと外筒２１Ｂの間に密閉された環状空間部２１Ｄを設
けている。その他の構成については、上記実施例と共通
するので共通の部材については図３中に同一符号を用い
て示し、説明を省略する。なお、上記実施例と同様に、
内筒２１Ａは接続管１５の先端部１６とほぼ同一の口径
で、他のパイプ８・９に比べて大きく形成されている。
このため、エンジンの出力に関係の深い排気慣性等が有
効に生じ、エンジンの性能が低下するなどの現象が生じ
ない。The difference between the exhaust muffler 1 'of the present embodiment and the above embodiment is the structure of the pipe-shaped catalyst portion. Fig. 3.
As shown in FIG. 4, in the communication pipe 21 ′ of the present example, a stainless steel pipe made of a punching plate having a large number of punched holes 21 c is surrounded by a perforated inner cylinder 21 A carrying platinum and rhodium, A stainless steel non-porous outer cylinder (holeless pipe) 21B is covered, and the inner cylinder 21
A hermetically closed annular space 21D is provided between A and the outer cylinder 21B. Since other configurations are common to the above-described embodiment, common members are denoted by the same reference numerals in FIG. 3 and description thereof is omitted. In addition, similarly to the above embodiment,
The inner cylinder 21A has substantially the same diameter as the distal end portion 16 of the connection pipe 15, and is formed larger than the other pipes 8 and 9.
Therefore, exhaust inertia or the like closely related to the output of the engine is effectively generated, and a phenomenon such as deterioration of engine performance does not occur.
【００３１】一方、内筒２１Ａ内に流入した排気ガス
は、内筒２１Ａの内周面に担持された白金やロジウムな
どに接触して浄化されるだけでなく、内筒２１Ａの穿設
された多数のパンチ孔２１ｃを通って環状空間部２１Ｄ
内に流入し、内筒２１Ａの外周面およびパンチ孔２１ｃ
の開口面に担持されている白金やロジウムなどとも接触
して浄化されたのち、環状空間部２１Ｄからふたたびパ
ンチ孔２１ｃを通って内筒２１Ａ内に流入し、後部消音
室１Ｃに排出される。ここで、排気ガスはいったん膨張
し、パイプ８を通って圧縮され、第２消音室１Ａ’（図
６・図７の前部消音室１Ａおよび中間部消音室１Ｂから
なる）に流入して膨張し、テールパイプ９を通って圧縮
され、外部へ放出されて膨張する。On the other hand, the exhaust gas flowing into the inner cylinder 21A is not only purified by contacting platinum, rhodium and the like carried on the inner peripheral surface of the inner cylinder 21A, but also is formed by drilling the inner cylinder 21A. The annular space 21D passes through a number of punch holes 21c.
And the outer peripheral surface of the inner cylinder 21A and the punch hole 21c.
After being purified by contact with platinum, rhodium, or the like carried on the opening surface of the nozzle, the air flows into the inner cylinder 21A again from the annular space 21D through the punch hole 21c, and is discharged to the rear silencer 1C. Here, the exhaust gas expands once, is compressed through the pipe 8, flows into the second silencer 1A '(consisting of the front silencer 1A and the middle silencer 1B in FIGS. 6 and 7) and expands. Then, it is compressed through the tail pipe 9 and released to the outside to expand.
【００３２】上記したように本例の排気マフラー１’に
よれば、排気ガスが内筒２１Ａの内外両面に担持された
白金およびロジウムに接触して浄化されるから、浄化率
が大幅に向上する。As described above, according to the exhaust muffler 1 'of this embodiment, the exhaust gas is purified by contacting the platinum and rhodium carried on the inner and outer surfaces of the inner cylinder 21A, so that the purification rate is greatly improved. .
【００３３】ところで、上記２つの実施例では、取付ス
ペース等の関係で、排気マフラー１・１’の前部側面に
エンジンからの排気管を接続したが、従来と同様に排気
マフラー１・１’の前端面に排気管を接続しても同様に
実施でき、本発明の効果を有効に発揮し得ることはいう
までもない。また、自動二輪車用の排気マフラーに限ら
ず、四輪自動車用の排気マフラーとしても適用できる。In the above two embodiments, the exhaust pipe from the engine is connected to the front side surface of the exhaust muffler 1.1 'in relation to the mounting space and the like. It goes without saying that the same effect can be obtained even if an exhaust pipe is connected to the front end face of the above, and the effect of the present invention can be effectively exhibited. Further, the present invention can be applied not only to an exhaust muffler for a motorcycle but also to an exhaust muffler for a four-wheeled vehicle.
【００３４】また、上記実施例では、エンジンの性能向
上を図るために排気管に直接に接続される連通管２１・
２１’の長さをかなり長くしているが、連通管２１・２
１’の長さを実施例ほど長くしない場合にも、同様に適
用できる。この場合には、たとえば排気マフラー内に配
置される連通管の全長あるいは大部分をパイプ形触媒部
に構成するのが浄化率を向上するうえで望ましい。In the above embodiment, the communication pipe 21 directly connected to the exhaust pipe in order to improve the performance of the engine.
Although the length of 21 'is considerably long, the communication pipe 21.2
The same applies to the case where the length of 1 'is not as long as in the embodiment. In this case, for example, it is desirable that the entire length or most of the communication pipe disposed in the exhaust muffler be configured as a pipe-shaped catalyst portion in order to improve the purification rate.
【００３５】[0035]
【発明の効果】以上説明したことから明らかなように、
本発明の排気マフラーは、次のような優れた効果を奏す
る。As is apparent from the above description,
The exhaust muffler of the present invention has the following excellent effects.
【００３６】(1) 請求項１の発明は、従来の排気管内に
パイプ形触媒部を取付金具を介して配置した排気マフラ
ーと違って排気抵抗が増大しないためにエンジンの性能
の低下が生じず、しかも排気ガスの触媒による浄化率も
同等もしくはそれ以上に優れている。また排気マフラー
内の連通管自体がパイプ形触媒部を構成するので、たと
えば従来のように連通管（パイプ）内にパイプ形触媒部
を挿入した構造に比べて、構造が簡単になり、重量も軽
減され、製造も容易になる。(1) Unlike the conventional exhaust muffler in which a pipe-type catalyst portion is disposed in a conventional exhaust pipe via a fitting, the exhaust resistance does not increase, so that the performance of the engine does not decrease. Further, the purification rate of the exhaust gas by the catalyst is equal to or better than that. Further, since the communication pipe itself in the exhaust muffler constitutes a pipe-shaped catalyst portion, the structure becomes simpler and the weight is reduced as compared with a conventional structure in which a pipe-shaped catalyst portion is inserted in a communication pipe (pipe) as in the conventional case. Reduced and easier to manufacture.
【００３７】(2) 請求項２の発明では、排気ガスが排気
マフラー内の連通管を通過する際にパイプ形触媒部で排
気抵抗の増加が生じることなく、スムーズに通過するか
ら、エンジンの性能の低下が生じない。また、排気ガス
は有孔内筒（パンチングプレート製パイプ）内を通過す
る際に、酸化触媒の場合は白金やロジウムなどと接触し
て燃焼成分などが酸化（酸化触媒の場合）され浄化され
るので、排気ガスの浄化率も従来と変わらず良好であ
る。しかも、有孔内筒の外側のステンレスウールなどの
耐熱性吸音材が高周波ノイズを吸収して外部への伝播を
抑制するから、消音効果も高く、また耐熱性吸音材によ
り有孔内筒からの熱が排気マフラーの周壁へ伝わりにく
い。(2) According to the second aspect of the present invention, when the exhaust gas passes through the communication pipe in the exhaust muffler, the exhaust gas passes smoothly without increasing the exhaust resistance in the pipe-shaped catalyst portion, so that the performance of the engine is improved. Does not decrease. In addition, when the exhaust gas passes through a perforated inner cylinder (punched plate pipe), in the case of an oxidation catalyst, it comes into contact with platinum, rhodium, etc. to oxidize combustion components (in the case of an oxidation catalyst) and is purified. Therefore, the purification rate of the exhaust gas is as good as before. In addition, the heat-resistant sound absorbing material such as stainless steel wool outside the perforated inner cylinder absorbs high-frequency noise and suppresses the propagation to the outside. Heat is not easily transmitted to the peripheral wall of the exhaust muffler.
【００３８】(3) 請求項３の発明では、請求項２記載の
発明と同様に排気ガスがパイプ形触媒部を通過する際の
流路抵抗が連通管や排気管の通過時とほとんど変わらな
いから、エンジンの性能が低下しない。また、排気ガス
は有孔内筒内を通過する際にその内周面の白金やロジウ
ムなどと接触すると同時に、多数のパンチ孔を通って外
側の環状空間部と有孔内筒内とも行き来するので、排気
ガスは有孔内筒の内周面だけでなく外周面に担持されて
いる白金やロジウムなどとも接触して浄化されるので、
請求項２の排気マフラーに比べて排気ガスの浄化率が大
幅に向上する。(3) According to the third aspect of the invention, similarly to the second aspect, the flow path resistance when the exhaust gas passes through the pipe-shaped catalyst portion is almost the same as when the exhaust gas passes through the communication pipe or the exhaust pipe. Therefore, the performance of the engine does not decrease. Also, when the exhaust gas passes through the perforated inner cylinder, it comes into contact with platinum or rhodium on the inner peripheral surface thereof, and at the same time, passes through a large number of punched holes and moves between the outer annular space and the perforated inner cylinder. Therefore, the exhaust gas is purified by contacting not only the inner peripheral surface of the perforated inner cylinder but also platinum and rhodium carried on the outer peripheral surface.
Compared with the exhaust muffler of the second aspect, the purification rate of the exhaust gas is greatly improved.
【００３９】一方、請求項２の場合と違って環状空間部
に耐熱性吸音材が介装されていないが、酸化触媒の場合
に排気ガスと接触し酸化され発熱するのは有孔内筒だけ
で、密閉された環状空間部を挟んで無孔外筒（パイプ）
で取り囲まれているので、有孔内筒の熱が仕切壁部材を
介して排気マフラーの側周面に伝達されにくく、また排
気マフラーの側周面にはグラスウールなどの断熱性吸音
材が介装されて、断熱効果が発揮される。On the other hand, unlike the case of the second aspect, the heat-resistant sound absorbing material is not interposed in the annular space portion. However, in the case of the oxidation catalyst, only the perforated inner cylinder is in contact with the exhaust gas and oxidized to generate heat. A non-porous outer cylinder (pipe) sandwiching the sealed annular space
The heat of the perforated inner cylinder is difficult to be transmitted to the side peripheral surface of the exhaust muffler through the partition wall member, and a heat insulating sound absorbing material such as glass wool is interposed on the side peripheral surface of the exhaust muffler. As a result, the heat insulating effect is exhibited.
【００４０】(4) 請求項４の発明では、排気管の長さ調
整や取付スペースの関係などから排気マフラーに対し前
部側面から排気管を接続しなければならない場合に、排
気管を排気マフラーと容易に接続することができ、しか
も排気管との接続箇所を最小限に抑えられるので、排気
マフラーの裏面に配置するだけで簡単に排気管の接続箇
所を隠すことができる。また、排気マフラーの開口と排
気管先端部の周囲にわずかに隙間ができるようにしたの
で、排気管の先端部を任意の方向に向けたり、排気管先
端部のマフラーの開口に対する傾斜角度を調節したりし
てマフラーに対する排気管の位置決めを正確に行い得
る。さらに、マフラーの開口と排気管の先端部との間に
設けられた隙間は、フランジで覆うことにより閉塞する
ことができる。言うまでもないが、排気管から排気マフ
ラー内に流入した排気ガスがパイプ形触媒部を通過し浄
化されるなどの効果は、請求項１〜３の発明と同様に発
揮される。(4) According to the invention of claim 4, when the exhaust pipe must be connected from the front side to the exhaust muffler due to the adjustment of the length of the exhaust pipe and the mounting space, the exhaust pipe is connected to the exhaust muffler. Can be easily connected, and the number of connection points with the exhaust pipe can be minimized. Therefore, the connection point of the exhaust pipe can be easily hidden simply by arranging it on the back surface of the exhaust muffler. In addition, a slight gap is created between the opening of the exhaust muffler and the tip of the exhaust pipe, so that the tip of the exhaust pipe can be oriented in any direction and the inclination angle of the tip of the exhaust pipe with respect to the opening of the muffler can be adjusted. As a result, the exhaust pipe can be accurately positioned with respect to the muffler. Furthermore, the gap provided between the opening of the muffler and the tip of the exhaust pipe can be closed by covering with a flange. Needless to say, the effect that the exhaust gas flowing into the exhaust muffler from the exhaust pipe passes through the pipe-shaped catalyst portion and is purified is exerted similarly to the inventions of claims 1 to 3.
【図１】本発明の実施例に係る自動二輪車の排気マフラ
ーを示す平面視断面図である。FIG. 1 is a sectional plan view showing an exhaust muffler of a motorcycle according to an embodiment of the present invention.
【図２】図１のＩＩ−II線断面図である。FIG. 2 is a sectional view taken along line II-II of FIG.
【図３】本発明の別の実施例に係る自動二輪車の排気マ
フラーを示す平面視断面図である。FIG. 3 is a sectional plan view showing an exhaust muffler of a motorcycle according to another embodiment of the present invention.
【図４】図３のパイプ形触媒部を拡大して示す一部を切
り欠いた斜視図である。FIG. 4 is an enlarged perspective view of a part of the pipe-shaped catalyst portion shown in FIG.
【図５】排気管長さの延長前と延長後のエンジンのトル
クカーブの比較を示す線図である。FIG. 5 is a diagram showing a comparison of torque curves of an engine before and after an exhaust pipe length is extended.
【図６】従来の一般的な排気マフラーを示す平面視断面
図で、同排気マフラーは触媒を備えていない。FIG. 6 is a cross-sectional plan view showing a conventional general exhaust muffler. The exhaust muffler has no catalyst.
【図７】先行技術としての触媒付き排気マフラーを示す
平面視断面図であるが、同排気マフラーは実施されてい
ない。FIG. 7 is a cross-sectional plan view showing a conventional exhaust muffler with a catalyst, but the exhaust muffler is not implemented.
１・１’ 排気マフラー １Ａ 前部消音室（膨張室） １Ａ’第２消音室（前部消音室１Ａおよび中間消音室１
Ｂ） １Ｂ 中間消音室（膨張室） １Ｃ 後部消音室（膨張室） ２ アウターボディ ３ インナーボディ ２ａ・３ａ 開口 ４ グラスウール（断熱吸音材） ５・６ 仕切り壁部材（バッフルプレート） ８ 連通管（パイプ） ９ テールパイプ １０ 後端壁 １１ パイプ １２ グラスウール（断熱吸音材） １５ 接続管（排気管） １５Ａ 継手 １６ 先端部 １７ フランジ ２１・２１’ 連通管（パイプ形触媒部） ２１ｃ パンチ孔（パンチング孔） ２１Ａ 有孔内筒（触媒担持パンチングプレートパイ
プ） ２１Ｂ 無孔外筒（パイプ） ２１Ｃ ステンレスウール（耐熱性吸音材） ２１Ｄ 密閉環状空間部 ２２ 継手 ２２Ａ 接続口1.1 'Exhaust muffler 1A Front silencer (expansion chamber) 1A' Second silencer (front silencer 1A and middle silencer 1
B) 1B Intermediate sound deadening chamber (expansion chamber) 1C Rear sound deadening chamber (expansion chamber) 2 Outer body 3 Inner body 2a / 3a opening 4 Glass wool (insulated sound absorbing material) 5.6 Partition wall member (baffle plate) 8 Communication pipe (pipe) 9) tail pipe 10 rear end wall 11 pipe 12 glass wool (insulated sound absorbing material) 15 connection pipe (exhaust pipe) 15A joint 16 tip part 17 flange 21/21 'communication pipe (pipe type catalyst part) 21c punch hole (punch hole) 21A Perforated inner tube (catalyst-carrying punching plate pipe) 21B Non-perforated outer tube (pipe) 21C Stainless wool (heat-resistant sound-absorbing material) 21D Hermetic annular space 22 Joint 22A Connection port
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１１年７月３０日（１９９９．７．３
０）[Submission date] July 30, 1999 (July 7, 1999)
0)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Correction target item name] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【特許請求の範囲】[Claims]
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００９[Correction target item name] 0009
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００９】[0009]
【課題を解決するための手段】上記の目的を達成するた
めに請求項１に係る発明は、a)内部を長手方向に間隔を
あけて仕切壁部材により複数の消音室に区画し、該消音
室間を前記仕切壁部材を貫通する連通管で接続した触媒
付き排気マフラーにおいて、b)前記排気マフラーの側周
面の前部に前記排気管の先端部を挿入するための開口を
設けるとともに、該開口の口径を前記排気管の外径より
もやや大きく形成したうえ、前記排気管先端部の前記開
口対応位置の周囲には外向きのフランジを溶接し、c)前
記開口を設けた消音室内に位置する前記第１連通管の端
部を、その一端開口が前記排気マフラー側周面の前記開
口に相対向するように屈曲させ、前記排気管の先端部を
直管状に形成し、前記連通管屈曲部の一端開口部内に軽
圧入したのち、d)前記フランジの外周部を前記排気マフ
ラーの側周面の開口の周囲に溶接し、前記開口と排気管
先端部との隙間を前記フランジで覆っている。 Means for Solving the Problems To achieve the above object, the invention according to claim 1 includes: a) partitioning the inside into a plurality of sound deadening chambers by a partition member at intervals in a longitudinal direction; An exhaust muffler with a catalyst, wherein chambers are connected by a communication pipe penetrating the partition wall member, b) a side circumference of the exhaust muffler
An opening for inserting the tip of the exhaust pipe at the front of the surface
And the diameter of the opening is larger than the outer diameter of the exhaust pipe.
It is formed slightly larger and the exhaust pipe tip
An outward flange is welded around the mouth corresponding position, c) in front
End of the first communication pipe located in the sound deadening chamber provided with the opening
The one end opening is the opening on the exhaust muffler side peripheral surface.
Bend so as to face the mouth, and the tip of the exhaust pipe
It is formed in a straight tubular shape, and lightly fits into the one end opening of the communication pipe bent portion.
After press-fitting, d) fit the outer periphery of the flange to the exhaust muffle
Welded around the opening on the side peripheral surface of the
The gap with the tip is covered with the flange.
【手続補正３】[Procedure amendment 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１０[Correction target item name] 0010
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１０】上記の構成を有する請求項１に係る発明に
よれば、エンジンからの排気管長さの調整（延長）や取
付スペース等の関係で排気マフラーの前面に排気管を接
続できず、マフラー側周面の前部に接続しなければなら
ない場合に、開口からマフラー内に挿入した排気管の直
管状先端部を、あらかじめマフラー内（の仕切壁部材）
に固定された連通管の屈曲部の一端開口部内に、ほぼ直
交するように軽圧入させられるので、堅固に接続できる
とともに、治具などを用いて両者の位置の調整を行って
連通管屈曲部の一端開口がマフラー本体の開口に対し真
っ正面を向くようにし、この状態で排気管の直管状先端
部を開口よりマフラー本体内に挿入し、軽圧入させるこ
とができる。このため、排気管と連通管の位置合わせが
正確に行えるとともに、排気管の直管状先端部を連通管
屈曲部の一端開口にほぼ真っすぐに軽圧入して接続でき
る。また開口と排気管の先端部との間に設けられた隙間
は、フランジで覆うことにより閉塞することができると
ともに、上記のようにして接続される排気マフラーに対
する排気管の状態は、排気マフラーに対し排気管が堅固
に接続され、しかも開口がフランジで覆われ、排気マフ
ラーと排気管との接続箇所が最小限に抑えられる。この
ため、排気管の接続箇所を排気マフラーの裏面に配置す
るだけで簡単に隠せる。 According to the first aspect of the present invention having the above-described structure , adjustment (extension) and removal of the length of the exhaust pipe from the engine are performed.
The exhaust pipe is connected to the front of the exhaust muffler due to
Connection to the front of the muffler side
The exhaust pipe inserted into the muffler from the opening
Preliminarily insert the tubular tip into the muffler (partition wall member)
Into the opening at one end of the bent portion of the communication pipe fixed to
It can be firmly connected because it is lightly pressed so that it intersects
At the same time, adjust the position of both using a jig etc.
One end opening of the communication pipe bend is true with respect to the opening of the muffler body.
To the front, and in this state, the straight tubular end of the exhaust pipe
Part into the muffler body through the opening and press-fit lightly.
Can be. For this reason, the alignment of the exhaust pipe and the communication pipe
It can be performed accurately, and the straight pipe end of the exhaust pipe is connected to the communication pipe.
Lightly press fit almost straight into the opening at one end of the bend and can be connected
You. A gap provided between the opening and the end of the exhaust pipe
Can be closed by covering with a flange
In both cases, the exhaust muffler connected as described above
The exhaust pipe condition is that the exhaust pipe is firm against the exhaust muffler.
And the opening is covered with a flange.
The connection point between the exhaust and the exhaust pipe is minimized. this
Therefore, place the connection point of the exhaust pipe on the back of the exhaust muffler.
Just hide it.
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１１[Correction target item name] 0011
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１１】請求項２に記載のように、e)前記排気マフ
ラー内に配設され、エンジンからの排気管に直接に接続
する第１の連通管の少なくとも一部を、該連通管とほぼ
同一口径のパイプ形触媒部で形成することが望ましい。 According to a second aspect of the present invention , e) the exhaust muffle
And connected directly to the exhaust pipe from the engine
At least a part of the first communication pipe is substantially
It is desirable to form them with pipe-shaped catalyst parts having the same diameter.
【手続補正５】[Procedure amendment 5]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１２[Correction target item name] 0012
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１２】請求項２に係る発明によれば、パイプ形触
媒部が排気マフラー内に配置されているために、排気ガ
スが流通してパイプ形触媒部（たとえば酸化触媒の場
合）が加熱されても、排気マフラーの周壁には通常、グ
ラスウールなどの断熱吸音材が介装されるなどあらかじ
め断熱対策が施されているため、排気マフラーに特別に
断熱手段を施す必要がない。また、エンジンの排気ポー
トからの排気管の終端側が、排気マフラー内の第１の
（入口に最も近い）連通管に直接に接続されるが、排気
管および連通管の口径（内径）の大きさの変化は排気慣
性や排気ガスの流通抵抗などに影響を与えるため、エン
ジンの性能に関連してくる。そこで、本発明では、排気
管に直接に接続される連通管の口径を排気管とほぼ同一
径にするのはもとより、パイプ形触媒部のパイプの口径
も連通管、いいかえれば排気管とほぼ同一径にしてパイ
プ形触媒部で排気ガスの流通抵抗（排気抵抗）が変化
（増加）するのを回避している。この結果、上記した従
来の排気管内にパイプ形触媒部を配置した排気マフラー
と違ってエンジンの性能の低下が生じず、しかも排気ガ
スの触媒による浄化率も同等もしくはそれ以上に優れた
ものになる。 According to the second aspect of the present invention, the pipe type touch
Since the medium is located in the exhaust muffler, the exhaust gas
Through the pipe-shaped catalyst section (for example, in the case of an oxidation catalyst).
The exhaust muffler is normally heated,
Beforehand, such as insulation material such as lath wool is interposed
Specially designed for exhaust muffler
There is no need to provide thermal insulation. Also, the engine exhaust port
The end side of the exhaust pipe from the exhaust muffler
Directly connected to the communication pipe (closest to the inlet), but
Changes in the size of the pipe (communication pipe) bore (inner diameter)
Impact on the performance and exhaust gas flow resistance.
It is related to the performance of gin. Therefore, in the present invention, the exhaust
Diameter of communication pipe directly connected to pipe is almost the same as exhaust pipe
Not only the diameter but also the diameter of the pipe of the pipe type catalyst part.
The communication pipe, in other words, the pipe with almost the same diameter as the exhaust pipe
Exhaust gas flow resistance (exhaust resistance) changes at the catalyst
(Increasing). As a result,
Exhaust muffler with a pipe-shaped catalyst section in the conventional exhaust pipe
Unlike other engines, the performance of the engine does not decrease and the exhaust gas
The purification rate of the catalyst is the same or better
Become something.
【手続補正６】[Procedure amendment 6]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１３[Correction target item name] 0013
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１３】請求項３記載のように、前記パイプ形触媒
部を、f)多数のパンチ孔を有するパンチングプレート製
パイプに白金およびロジウムなどの触媒素材を担持した
有孔内筒と、この有孔内筒の周囲を取り囲むように被装
した無孔外筒と、この無孔外筒と前記有孔内筒との間に
介装するステンレスウールなどの耐熱性吸音材とから構
成することができる。 As set forth in claim 3, the pipe-shaped catalyst
Part is made of f) a punching plate with many punch holes
Supporting catalyst materials such as platinum and rhodium on pipes
A perforated inner cylinder and a jacket that surrounds the perimeter of the perforated inner cylinder
Non-perforated outer cylinder, between this non-perforated outer cylinder and the perforated inner cylinder
Composed of heat-resistant sound-absorbing material such as stainless steel wool
Can be achieved.
【手続補正７】[Procedure amendment 7]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１４[Correction target item name] 0014
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１４】請求項３記載の発明によれば、排気マフラ
ー内の連通管（パイプ）あるいはその一部がパイプ形触
媒部をなすから、排気ガスが連通管を通過する際にパイ
プ形触媒部で排気ガスの流通抵抗が変化し排気抵抗が増
加することがなく、スムーズに通過するので、エンジン
の性能の低下が起こらない。また、排気ガスは有孔内筒
（パンチングプレート製パイプ）内を通過する際に、白
金やロジウムなどの酸化触媒の場合には接触して加熱さ
れ、主に未燃焼成分などが酸化されるので、排気ガスが
浄化される。しかも、有孔内筒の外側のステンレスウー
ルなどの耐熱性吸音材が高周波ノイズを吸収して外部へ
の伝播を抑制するから、消音効果も高く、また耐熱性吸
音材により有孔内筒からの熱が仕切壁部材を介して排気
マフラーの周壁へ伝わるのが防止される。 According to the third aspect of the present invention, the exhaust muffler
-The communication pipe (pipe) inside or part of it
Since the exhaust gas passes through the communication pipe,
Exhaust gas resistance increases due to changes in exhaust gas flow resistance
The engine passes because it passes smoothly without adding
The performance of the device does not decrease. The exhaust gas is a perforated inner cylinder
(Punching plate pipe)
In the case of oxidation catalysts such as gold and rhodium,
Exhaust gas is oxidized, mainly because unburned components are oxidized.
Be purified. Moreover, the stainless steel woofer outside the perforated inner cylinder
Heat-absorbing sound-absorbing material such as
Suppresses the propagation of noise, it has a high noise reduction effect,
Heat from the perforated inner cylinder is exhausted by the sound material through the partition wall member
Transmission to the peripheral wall of the muffler is prevented.
【手続補正８】[Procedure amendment 8]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１５[Correction target item name] 0015
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１５】請求項４記載のように、前記パイプ形触媒
部を、g)多数のパンチ孔を有するパンチングプレート製
パイプに白金およびロジウムなどの触媒素材を担持した
有孔内筒と、この有孔内筒の周囲を取り囲むように被装
した無孔外筒と、この無孔外筒と前記有孔内筒との間に
介在する密閉環状空間部とから構成することが好まし
い。なお、請求項３の触媒素材も含めて、触媒素材とは
白金やロジウムのほか、パナジウム、銅、マンガンなど
の種々の金属や金属酸化物をいい、本発明における触媒
とは酸化触媒や還元触媒、三次元触媒などを含む。 [0015] The pipe-shaped catalyst according to claim 4.
G) punching plate with many punch holes
Supporting catalyst materials such as platinum and rhodium on pipes
A perforated inner cylinder and a jacket that surrounds the perimeter of the perforated inner cylinder
Non-perforated outer cylinder, between this non-perforated outer cylinder and the perforated inner cylinder
It is preferable that it is composed of an enclosed annular space
No. In addition, the catalyst material including the catalyst material of claim 3 is
Platinum, rhodium, panadium, copper, manganese, etc.
Of various metals and metal oxides of the present invention
The term includes an oxidation catalyst, a reduction catalyst, a three-dimensional catalyst, and the like.
【手続補正９】[Procedure amendment 9]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１６[Correction target item name] 0016
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１６】請求項４記載の発明によれば、請求項３記
載の発明と同様に排気ガスがパイプ形触媒部を通過する
際の流路抵抗が連通管や排気管の通過時とほとんど変わ
らないから、エンジンの性能が低下しない。また、排気
ガスは有孔内筒内を通過する際にその表面（内周面）の
白金やロジウムなどと接触すると同時に、多数のパンチ
孔を通って外側の環状空間部と有孔内筒内とも行き来す
るので、排気ガスは有孔内筒の内周面だけでなく外周面
に担持されている白金やロジウムなどとも接触して浄化
されるために、請求項３の排気マフラーに比べて排気ガ
スの浄化率が大幅に向上する。一方、請求項３の場合と
違って環状空間部に耐熱性吸音材が介装されていない
が、触媒が酸化触媒の場合に排気ガスと接触して発熱す
るのは有孔内筒だけで、密閉された環状空間部を挟んで
無孔外筒（パイプ）で取り囲まれているので、仕切壁部
材を介して排気マフラーの側周面に伝達されにくい。ま
た排気マフラーの側周面にはグラスウールなどの断熱性
吸音材を介装して、断熱作用が発揮されるようにしてい
る。 According to the invention described in claim 4, according to claim 3,
Exhaust gas passes through the pipe-shaped catalyst section as in the above invention
Flow resistance is almost the same as when passing through a communication pipe or exhaust pipe.
The engine performance does not decrease. Also exhaust
When the gas passes through the perforated inner cylinder, its surface (inner peripheral surface)
Many punches at the same time as contacting platinum and rhodium
It moves between the outer annular space and the perforated inner cylinder through the hole
Therefore, the exhaust gas is not only on the inner peripheral surface of the perforated inner cylinder but also on the outer peripheral surface.
Purification by contact with platinum, rhodium, etc. carried on
Therefore, compared with the exhaust muffler of claim 3, the exhaust gas
The purification rate of gas is greatly improved. On the other hand,
No heat-resistant sound absorbing material is interposed in the annular space
Generates heat when coming into contact with exhaust gas when the catalyst is an oxidation catalyst.
Only the perforated inner cylinder, sandwiching the closed annular space
Partition wall because it is surrounded by a non-porous outer tube (pipe)
It is not easily transmitted to the side peripheral surface of the exhaust muffler through the material. Ma
Insulation of glass wool etc. on the side surface of the exhaust muffler
Sound insulation material is interposed to provide heat insulation
You.
【手続補正１０】[Procedure amendment 10]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００３６[Correction target item name] 0036
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００３６】(1) 請求項１の発明では、排気管の長さ調
整や取付スペースの関係などから排気マフラーに対し前
部側面から排気管を接続しなければならない場合に、排
気管を排気マフラーと容易に接続することができ、しか
も排気管との接続箇所を最小限に抑えられるので、排気
マフラーの裏面に配置するだけで簡単に排気管の接続箇
所を隠すことができる。また、排気マフラーの開口と排
気管先端部の周囲にわずかに隙間ができるようにしたの
で、排気管の先端部を任意の方向に向けたり、排気管先
端部のマフラーの開口に対する傾斜角度を調節したりし
てマフラーに対する排気管の位置決めを正確に行い得
る。さらに、マフラーの開口と排気管の先端部との間に
設けられた隙間は、フランジで覆うことにより閉塞する
ことができる。 (1) According to the first aspect of the invention , the length of the exhaust pipe is adjusted.
Before the exhaust muffler due to adjustments and installation space
If the exhaust pipe must be connected from the side
The trachea can be easily connected to the exhaust muffler,
Also minimizes the number of connections to the exhaust pipe,
It is easy to connect the exhaust pipe simply by placing it on the back of the muffler.
You can hide the place. Also, the exhaust muffler opening and exhaust
So there ’s a small gap around the tracheal tip
The end of the exhaust pipe in any direction, or
Adjust the inclination angle of the end muffler with respect to the opening
Position the exhaust pipe with respect to the muffler
You. In addition, between the opening of the muffler and the tip of the exhaust pipe
The provided gap is closed by covering with a flange
be able to.
【手続補正１１】[Procedure amendment 11]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００３７[Correction target item name] 0037
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００３７】(2) 請求項２の発明では、従来の排気管内
にパイプ形触媒部を取付金具を介して配置した排気マフ
ラーと違って排気抵抗が増大しないためにエンジンの性
能の低下が生じず、しかも排気ガスの触媒による浄化率
も同等もしくはそれ以上に優れている。また排気マフラ
ー内の連通管自体がパイプ形触媒部を構成するので、た
とえば従来のように連通管（パイプ）内にパイプ形触媒
部を挿入した構造に比べて、構造が簡単になり、重量も
軽減され、製造も容易になる。 (2) According to the second aspect of the present invention, the conventional exhaust pipe
Exhaust muffle with a pipe-type catalyst section arranged via mounting brackets
Engine does not increase exhaust resistance unlike
No reduction in performance and purification rate of exhaust gas by catalyst
Are equally or better. Also exhaust muffler
Since the communication pipe inside constitutes a pipe-shaped catalyst part,
For example, as in the past, a pipe-shaped catalyst
The structure is simpler and the weight is lower than the structure where the part is inserted.
Reduced and easier to manufacture.
【手続補正１２】[Procedure amendment 12]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００３８[Correction target item name] 0038
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００３８】(3) 請求項３の発明では、排気ガスが排気
マフラー内の連通管を通過する際にパイプ形触媒部で排
気抵抗の増加が生じることなく、スムーズに通過するか
ら、エンジンの性能の低下が生じない。また、排気ガス
は有孔内筒（パンチングプレート製パイプ）内を通過す
る際に、酸化触媒の場合は白金やロジウムなどと接触し
て燃焼成分などが酸化（酸化触媒の場合）され浄化され
るので、排気ガスの浄化率も従来と変わらず良好であ
る。しかも、有孔内筒の外側のステンレスウールなどの
耐熱性吸音材が高周波ノイズを吸収して外部への伝播を
抑制するから、消音効果も高く、また耐熱性吸音材によ
り有孔内筒からの熱が排気マフラーの周壁へ伝わりにく
い。 (3) According to the third aspect of the invention, the exhaust gas is exhausted.
When passing through the communication pipe in the muffler, the exhaust
Passing smoothly without increasing resistance
Therefore, the performance of the engine does not decrease. Also exhaust gas
Passes through a perforated inner cylinder (punched plate pipe)
When the oxidation catalyst is used, it comes into contact with platinum, rhodium, etc.
Combustion components are oxidized (in the case of oxidation catalysts) and purified
Therefore, the exhaust gas purification rate remains as good as before.
You. Moreover, stainless steel wool etc. outside the perforated inner cylinder
Heat-resistant sound-absorbing material absorbs high-frequency noise and propagates to the outside
Suppress, so the sound-absorbing effect is high.
Heat from the perforated inner cylinder is difficult to transfer to the peripheral wall of the exhaust muffler.
No.
【手続補正１３】[Procedure amendment 13]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００３９[Correction target item name] 0039
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００３９】(4) 請求項４の発明では、請求項３記載の
発明と同様に排気ガスがパイプ形触媒部を通過する際の
流路抵抗が連通管や排気管の通過時とほとんど変わらな
いから、エンジンの性能が低下しない。また、排気ガス
は有孔内筒内を通過する際にその内周面の白金やロジウ
ムなどと接触すると同時に、多数のパンチ孔を通って外
側の環状空間部と有孔内筒内とも行き来するので、排気
ガスは有孔内筒の内周面だけでなく外周面に担持されて
いる白金やロジウムなどとも接触して浄化されるので、
請求項３の排気マフラーに比べて排気ガスの浄化率が大
幅に向上する。 [0039] (4) In the invention of claim 4, according to claim 3, wherein
Similar to the invention, when the exhaust gas passes through the pipe-shaped catalyst section
The flow path resistance is almost the same as when passing through the communication pipe or exhaust pipe.
Therefore, engine performance does not decrease. Also exhaust gas
When passing through the perforated inner cylinder, platinum or rhodium
At the same time as the
Exhaust gas flows between the annular space on the side and the perforated inner cylinder.
The gas is carried not only on the inner peripheral surface but also on the outer peripheral surface of the perforated inner cylinder.
It is purified by contact with platinum, rhodium, etc.
The exhaust gas purification rate is higher than the exhaust muffler according to claim 3.
Improve in width.
【手続補正１４】[Procedure amendment 14]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００４０[Correction target item name] 0040
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００４０】一方、請求項３の場合と違って環状空間部
に耐熱性吸音材が介装されていないが、酸化触媒の場合
に排気ガスと接触し酸化され発熱するのは有孔内筒だけ
で、密閉された環状空間部を挟んで無孔外筒（パイプ）
で取り囲まれているので、有孔内筒の熱が仕切壁部材を
介して排気マフラーの側周面に伝達されにくく、また排
気マフラーの側周面にはグラスウールなどの断熱性吸音
材が介装されて、断熱効果が発揮される。 On the other hand, unlike the case of claim 3, the annular space portion
Heat-resistant sound-absorbing material is not interposed in the
The only thing that comes into contact with the exhaust gas and oxidizes and generates heat is the perforated inner cylinder
A non-porous outer cylinder (pipe) sandwiching the sealed annular space
Is surrounded by the heat of the perforated inner cylinder
Is hardly transmitted to the side peripheral surface of the exhaust muffler
Insulation sound absorption such as glass wool on the side peripheral surface of the ki muffler
The material is interposed, and a heat insulating effect is exhibited.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ０１Ｎ 3/28 ＺＡＢ Ｂ０１Ｄ 53/36 ＺＡＢＣ Ｆターム(参考） 3G004 AA02 BA03 BA06 DA09 FA04 3G091 AA03 AB02 BA15 BA19 BA38 BA39 GA02 GB01W GB01X GB01Z GB05W GB06W GB10W GB16Z HA05 HA27 HA28 HA29 HA31 4D048 AA02 AA06 AA14 AB01 AB02 AB05 BA23Y BA28Y BA30X BA33X BA35Y BA39X BB05 CA07 CC38 4G069 AA03 AA08 AA11 BB02A BB02B BC71A BC71B BC75A BC75B CA03 DA06 EA03X EA03Y EA06 EA26 EA28 EB07 EB10 ED06 FA04 FB72 FB76 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) F01N 3/28 ZAB B01D 53/36 ZABC F-term (Reference) 3G004 AA02 BA03 BA06 DA09 FA04 3G091 AA03 AB02 BA15 BA19 BA38 BA39 GA02 GB01W GB01X GB01Z GB05W GB06W GB10W GB16Z HA05 HA27 HA28 HA29 HA31 4D048 AA02 AA06 AA14 AB01 AB02 AB05 BA23Y BA28Y BA30X BA33X BA35Y BA39X BB05 CA07 CC38 4G069 AA03 AA08 AA11 BC02A03 EB02 BB02A03 BC02A03 FA04 FB72 FB76
Claims (4)
材により複数の消音室に区画し、該消音室間を前記仕切
壁部材を貫通する連通管で接続した触媒付き排気マフラ
ーにおいて、 前記排気マフラー内に配設され、エンジンからの排気管
に直接に接続する第１の連通管の少なくとも一部を、該
連通管とほぼ同一口径のパイプ形触媒部で形成したこと
を特徴とする触媒付き排気マフラー。An exhaust muffler with a catalyst, wherein the interior is divided into a plurality of sound deadening chambers by a partition wall member at intervals in a longitudinal direction, and the sound deadening chambers are connected by a communication pipe penetrating the partition wall member. A catalyst, wherein at least a part of a first communication pipe disposed in an exhaust muffler and directly connected to an exhaust pipe from an engine is formed of a pipe-shaped catalyst portion having substantially the same diameter as the communication pipe. With exhaust muffler.
白金およびロジウムなどの触媒素材を担持した有孔内筒
と、この有孔内筒の周囲を取り囲むように被装した無孔
外筒と、この無孔外筒と前記有孔内筒との間に介装する
ステンレスウールなどの耐熱性吸音材とから構成した請
求項１記載の触媒付き排気マフラー。2. A perforated inner cylinder in which a catalyst material such as platinum and rhodium is carried on a pipe made of a punching plate having a number of punched holes, and a perimeter of the perforated inner cylinder. The exhaust muffler with a catalyst according to claim 1, comprising a non-porous outer cylinder mounted thereon, and a heat-resistant sound absorbing material such as stainless steel wool interposed between the non-porous outer cylinder and the perforated inner cylinder.
白金およびロジウムなどの触媒素材を担持した有孔内筒
と、この有孔内筒の周囲を取り囲むように被装した無孔
外筒と、この無孔外筒と前記有孔内筒との間に介在する
密閉環状空間部とから構成した請求項１記載の触媒付き
排気マフラー。3. A perforated inner cylinder in which a catalyst material such as platinum and rhodium is carried on a perforated pipe made of a perforated plate having a large number of perforated holes, and a perimeter of the perforated inner cylinder. The exhaust muffler with a catalyst according to claim 1, comprising a non-porous outer cylinder mounted thereon, and a sealed annular space interposed between the non-porous outer cylinder and the perforated inner cylinder.
排気管の先端部を挿入するための開口を設けるととも
に、該開口の口径を前記排気管の外径よりもやや大きく
形成したうえ、前記排気管先端部の前記開口対応位置の
周囲には外向きのフランジを溶接し、前記開口を設けた
消音室内に位置する前記第１連通管の端部を、その一端
開口が前記排気マフラー側周面の前記開口に相対向する
ように屈曲させ、前記排気管の先端部を直管状に形成
し、前記連通管屈曲部の一端開口部内にほぼ直交するよ
うに軽圧入したのち、前記フランジの外周部を前記排気
マフラーの側周面の開口の周囲に溶接し、前記開口と排
気管先端部との隙間を前記フランジで覆った請求項１〜
３のいずれかに記載の触媒付き排気マフラー。4. An opening for inserting a tip of the exhaust pipe is provided at a front portion of a side peripheral surface of the exhaust muffler, and the diameter of the opening is formed to be slightly larger than the outer diameter of the exhaust pipe. An outward flange is welded around the position corresponding to the opening at the end of the exhaust pipe, and the end of the first communication pipe located in the sound deadening chamber provided with the opening is provided at one end of the exhaust muffler. The distal end portion of the exhaust pipe is formed in a straight tubular shape by being bent so as to face the opening on the side peripheral surface, and lightly press-fitted so as to be substantially orthogonal to the one end opening of the communication pipe bent portion, and then the flange is formed. An outer peripheral portion of the exhaust muffler is welded to a periphery of an opening on a side peripheral surface of the exhaust muffler, and a gap between the opening and a distal end portion of the exhaust pipe is covered with the flange.
3. The exhaust muffler with a catalyst according to any one of 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10250928A JP2980898B1 (en) | 1998-09-04 | 1998-09-04 | Exhaust muffler with catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10250928A JP2980898B1 (en) | 1998-09-04 | 1998-09-04 | Exhaust muffler with catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2980898B1 JP2980898B1 (en) | 1999-11-22 |
| JP2000080917A true JP2000080917A (en) | 2000-03-21 |
Family
ID=17215114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10250928A Expired - Fee Related JP2980898B1 (en) | 1998-09-04 | 1998-09-04 | Exhaust muffler with catalyst |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2980898B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074587A (en) * | 2014-06-20 | 2014-10-01 | 黄光友 | Automotive exhaust pipe |
| CN106285835A (en) * | 2016-08-31 | 2017-01-04 | 芜湖恒耀汽车零部件有限公司 | Automobile exhaust pipe deafener |
| JP2021161931A (en) * | 2020-03-31 | 2021-10-11 | 本田技研工業株式会社 | Exhaust muffler |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2849987B2 (en) | 1995-03-24 | 1999-01-27 | 本田技研工業株式会社 | Exhaust gas purification device |
| JP2837382B2 (en) | 1996-03-14 | 1998-12-16 | 川崎重工業株式会社 | Engine exhaust purification device |
-
1998
- 1998-09-04 JP JP10250928A patent/JP2980898B1/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074587A (en) * | 2014-06-20 | 2014-10-01 | 黄光友 | Automotive exhaust pipe |
| CN106285835A (en) * | 2016-08-31 | 2017-01-04 | 芜湖恒耀汽车零部件有限公司 | Automobile exhaust pipe deafener |
| JP2021161931A (en) * | 2020-03-31 | 2021-10-11 | 本田技研工業株式会社 | Exhaust muffler |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2980898B1 (en) | 1999-11-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2967390B2 (en) | Muffler and manufacturing method thereof | |
| US5396767A (en) | Engine exhaust gas cleaning system | |
| JP4024127B2 (en) | Exhaust device for internal combustion engine | |
| JP2002054421A (en) | Low-cost muffler | |
| JP3335097B2 (en) | Silencer | |
| JP2980898B1 (en) | Exhaust muffler with catalyst | |
| US5314665A (en) | Catalytic converter | |
| JP3044018B2 (en) | Exhaust muffler | |
| JP2002195027A (en) | Exhaust muffler for vehicle | |
| JP3827208B2 (en) | Engine muffler and motorcycle | |
| JP3306096B2 (en) | Exhaust system for internal combustion engine with catalyst | |
| JP3446790B2 (en) | Shell for silencer | |
| JP3306097B2 (en) | Exhaust system for internal combustion engine with catalyst such as motorcycle | |
| JP4277566B2 (en) | Exhaust structure | |
| JP2902388B1 (en) | Exhaust manifold for motorcycle | |
| JP2002235537A (en) | Exhaust muffler device for vehicle | |
| JP2003138931A (en) | Exhaust emission control device | |
| JP4307623B2 (en) | Silencer | |
| JP2915386B1 (en) | Exhaust manifold for motorcycle | |
| JP3374046B2 (en) | Exhaust muffler for engine | |
| JPH0742544A (en) | Muffler equipped with exhaust emission control device | |
| JPH0330569Y2 (en) | ||
| JP3022340B2 (en) | Exhaust system catalyst device | |
| JPS5943457Y2 (en) | Silencer | |
| JPH09287431A (en) | Shell for muffler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080917 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090917 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100917 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110917 Year of fee payment: 12 |
|
| LAPS | Cancellation because of no payment of annual fees |