JPH08303236A - Exhaust gas purifying device for internal combustion engine - Google Patents
Exhaust gas purifying device for internal combustion engineInfo
- Publication number
- JPH08303236A JPH08303236A JP11098195A JP11098195A JPH08303236A JP H08303236 A JPH08303236 A JP H08303236A JP 11098195 A JP11098195 A JP 11098195A JP 11098195 A JP11098195 A JP 11098195A JP H08303236 A JPH08303236 A JP H08303236A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- pipe
- steel plate
- thin
- exhaust pipe
- 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
Landscapes
- Exhaust Silencers (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、内燃機関の排気浄化装
置の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an exhaust gas purification device for an internal combustion engine.
【０００２】[0002]
【従来の技術】従来、内燃機関の排気浄化装置として
は、例えば特開平３−８５３１６号公報「内燃機関の
排気ガス浄化装置」や実開昭５５−１１０７１９号公
報「触媒コンバーター」が提案されている。上記はそ
の公報の第１図及び第７図によれば、内燃機関の排気口
に排気管３を連結し、この排気管３内に排気管３と同方
向に延び多孔を有する内管５を配置し、この内管５の壁
面に触媒を含んだ担体８を付着したものである。排気管
３及び内管５は径方向に分割された半割円筒状であり、
排気管３の合せ縁の間に内管５の合せ縁を挟み、溶着に
て一体化している。2. Description of the Related Art Conventionally, as an exhaust gas purification apparatus for an internal combustion engine, for example, JP-A-3-85316 "Exhaust gas purification apparatus for internal combustion engine" and Japanese Utility Model Laid-Open No. 55-110719 "Catalytic converter" have been proposed. There is. According to FIGS. 1 and 7 of the publication, the exhaust pipe 3 is connected to an exhaust port of an internal combustion engine, and an inner pipe 5 extending in the same direction as the exhaust pipe 3 and having a porous structure is provided in the exhaust pipe 3. The inner tube 5 is arranged and the catalyst-containing carrier 8 is attached to the wall surface of the inner tube 5. The exhaust pipe 3 and the inner pipe 5 have a half-divided cylindrical shape divided in the radial direction,
The fitting edge of the inner pipe 5 is sandwiched between the fitting edges of the exhaust pipe 3, and they are integrated by welding.
【０００３】また、上記はその公報の第５図によれ
ば、フロントエキゾーストパイプ２にコーン４を介して
円筒状アウタケース６の一端部を連結し、このアウタケ
ース６の他端部にコーン５を介してリヤエキゾーストパ
イプ３を連結し、アウタケース６内にアウタケース６と
同方向に延びるラスメタル触媒の円筒体９を配置したも
のである。円筒体９の一端は固定リング１３を介してフ
ロントエキゾーストパイプ２に固定され、円筒体９の他
端は固定リング１３’を介してリヤエキゾーストパイプ
３に摺動可能に係止される。Further, according to FIG. 5 of the publication, one end of a cylindrical outer case 6 is connected to the front exhaust pipe 2 via a cone 4, and the cone 5 is connected to the other end of the outer case 6. The rear exhaust pipe 3 is connected to the rear exhaust pipe 3 via the above, and a cylindrical body 9 of a lath metal catalyst extending in the same direction as the outer case 6 is arranged in the outer case 6. One end of the cylindrical body 9 is fixed to the front exhaust pipe 2 via a fixing ring 13, and the other end of the cylindrical body 9 is slidably locked to the rear exhaust pipe 3 via a fixing ring 13 '.
【０００４】[0004]
【発明が解決しようとする課題】上記は、排気管３よ
りも細い内管５内を排気が通過するので、圧力損失が大
きい。また、排気管３と内管５との間で径が急激に縮小
・拡大するので、圧力損失が大きい。このため、圧力損
失が内燃機関の性能に与える影響は大きく、特に、低出
力の内燃機関では無視できない要素である。更に、排気
管３と内管５とが一体化しているので、熱膨張に伴う両
者の伸び量の差を吸収することが容易でない。上記
は、フロント・リヤエキゾーストパイプ２，３がアウタ
ケース６及び円筒体９と個別に連結したものであり、コ
ーン４，５を必要とするので部品数が多く、組付け作業
が面倒でコストが嵩む。また、上記は、円筒体９が固
定リング１３，１３’を介してフロント・リヤエキゾー
ストパイプ２，３に連結したものであり、部品数が多
く、組付け作業が面倒でコストが嵩む。本発明の目的
は、（１）少ない部品数で組付け作業を簡単にするこ
と、（２）内燃機関の性能に極力影響を与えないこと、
（３）熱膨張に伴う両者の伸び量の差の吸収を容易にす
ることにある。In the above, since the exhaust gas passes through the inner pipe 5 which is thinner than the exhaust pipe 3, the pressure loss is large. Moreover, since the diameter between the exhaust pipe 3 and the inner pipe 5 is rapidly reduced and expanded, the pressure loss is large. Therefore, the pressure loss has a great influence on the performance of the internal combustion engine, and is a factor that cannot be ignored particularly in a low-power internal combustion engine. Furthermore, since the exhaust pipe 3 and the inner pipe 5 are integrated, it is not easy to absorb the difference in elongation between the two due to thermal expansion. The above is one in which the front and rear exhaust pipes 2 and 3 are individually connected to the outer case 6 and the cylindrical body 9, and since the cones 4 and 5 are required, the number of parts is large, the assembly work is troublesome, and the cost is high. Bulky. Further, in the above, the cylindrical body 9 is connected to the front and rear exhaust pipes 2 and 3 via the fixing rings 13 and 13 ', and the number of parts is large, the assembling work is troublesome, and the cost is high. The object of the present invention is (1) to simplify the assembly work with a small number of parts, (2) to minimize the influence on the performance of the internal combustion engine,
(3) To make it easy to absorb the difference in elongation between the two due to thermal expansion.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に本発明は、複数の薄肉鋼板製排気管及び薄肉鋼板製消
音器を互いに結合して排気通路を形成した内燃機関の排
気装置において、前記排気装置内に前記排気通路と同方
向に延びた薄肉鋼板製内管を配置し、この薄肉鋼板製内
管の壁に内外面に連通する連通部を形成し、更に、前記
薄肉鋼板製内管の壁面に貴金属を担持し、且つ、前記薄
肉鋼板製内管の一端部を複数の薄肉鋼板製排気管の結合
部位又は薄肉鋼板製消音器の結合部位に固定したことを
特徴とする。To achieve the above object, the present invention provides an exhaust system for an internal combustion engine in which a plurality of exhaust pipes made of thin steel plates and a silencer made of thin steel plates are connected to each other to form an exhaust passage, An inner pipe made of a thin steel plate extending in the same direction as the exhaust passage is arranged in the exhaust device, a communication portion communicating with the inner and outer surfaces is formed on the wall of the inner pipe made of the thin steel plate, and the inner pipe made of the thin steel plate is further formed. It is characterized in that a noble metal is carried on the wall surface of the pipe, and one end of the inner pipe made of the thin steel plate is fixed to a connecting portion of a plurality of exhaust pipes made of the thin steel plate or a connecting portion of a silencer made of the thin steel plate.
【０００６】また、前記薄肉鋼板製内管を、この薄肉鋼
板製内管の一端部及び他端部が隣接する前記薄肉鋼板製
排気管又は薄肉鋼板製消音器と略同径とした。Further, the inner wall of the thin-walled steel plate has substantially the same diameter as the exhaust wall of the thin-walled steel plate or the silencer made of the thin-walled steel plate in which one end and the other end of the inner wall of the thin-walled steel plate are adjacent to each other.
【０００７】更に、前記薄肉鋼板製内管の他端部を、前
記排気装置に対して軸方向に伸縮可能とした。Further, the other end of the thin-walled steel plate inner tube can be expanded and contracted in the axial direction with respect to the exhaust device.
【０００８】[0008]
【作用】薄肉鋼板製内管を複数の薄肉鋼板製排気管の結
合部位又は薄肉鋼板製消音器に直接結合するので、部品
数が少なく、組付けも簡単になる。Since the inner pipe made of the thin steel plate is directly connected to the connecting portion of the plurality of exhaust pipes made of the thin steel plate or the silencer made of the thin steel plate, the number of parts is small and the assembling is easy.
【０００９】薄肉鋼板製内管が、この薄肉鋼板製内管の
一端部及び他端部が隣接する薄肉鋼板製排気管又は薄肉
鋼板製消音器と略同径であり、細くならないので排気が
通過する際の圧力損失が小さい。また、管径が急激に変
化しないので、排気が通過する際の圧力損失が小さい。Since the thin-walled steel plate inner pipe has substantially the same diameter as the thin-walled steel plate exhaust pipe or the thin-walled steel plate silencer to which one end and the other end of the thin-walled steel plate inner pipe are adjacent, the exhaust gas passes therethrough. The pressure loss when doing is small. Further, since the pipe diameter does not change suddenly, the pressure loss when exhaust gas passes is small.
【００１０】薄肉鋼板製内管の他端部が、排気装置に対
して軸方向に伸縮可能であり、熱膨張に伴う内管と排気
装置との間の伸び量の差が吸収される。The other end of the thin-walled steel plate inner pipe is axially expandable and contractable with respect to the exhaust device, and absorbs a difference in elongation between the inner pipe and the exhaust device due to thermal expansion.
【００１１】[0011]
【実施例】本発明の実施例を添付図に基づいて以下に説
明する。なお、図面は符号の向きに見るものとする。図
１は本発明に係る内燃機関の排気浄化装置を装着した自
動二輪車の側面図であり、自動二輪車１は車体２中央付
近にエンジン（内燃機関）３を備え、このエンジン３の
排気口４に複数の排気管及び薄肉鋼板製消音器６を互い
に結合して排気通路を形成した排気装置を接続してな
る。Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a side view of a motorcycle equipped with an exhaust purification system for an internal combustion engine according to the present invention. The motorcycle 1 includes an engine (internal combustion engine) 3 near the center of a vehicle body 2 and an exhaust port 4 of the engine 3 A plurality of exhaust pipes and a silencer 6 made of thin steel plates are connected to each other to connect an exhaust device which forms an exhaust passage.
【００１２】図２は本発明に係る排気装置の側面図（消
音器を外した姿）であり、排気装置５は複数の薄肉鋼板
製排気管（第１排気管１１、第２排気管１２及び第３排
気管１３からなる。）及び薄肉鋼板製消音器６（図１参
照）を互いに結合してなる。すなわち、排気装置５はエ
ンジン３の排気口４（図１参照）に第１排気管１１の一
端部１１ａをフランジで結合し、この第１排気管１１の
他端部１１ｂに第２排気管１２の一端部１２ａを溶接で
結合し、この第２排気管１２の他端部１２ｂに第３排気
管１３の一端部１３ａを溶接で結合し、この第３排気管
１３の他端部１３ｂに消音器６（図１参照）をフランジ
で結合し、第２排気管１２内に内管１４（図３にて詳述
する）を配置してなる。FIG. 2 is a side view of the exhaust system according to the present invention (with the silencer removed), and the exhaust system 5 includes a plurality of thin steel plate exhaust pipes (first exhaust pipe 11, second exhaust pipe 12 and The third exhaust pipe 13) and the silencer 6 made of a thin steel plate (see FIG. 1) are connected to each other. That is, the exhaust device 5 connects one end 11a of the first exhaust pipe 11 to the exhaust port 4 of the engine 3 (see FIG. 1) with a flange, and connects the second exhaust pipe 12 to the other end 11b of the first exhaust pipe 11. One end 12a of the second exhaust pipe 12 is joined by welding, one end 13a of the third exhaust pipe 13 is joined by welding to the other end 12b of the second exhaust pipe 12, and the other end 13b of the third exhaust pipe 13 is silenced. The container 6 (see FIG. 1) is connected by a flange, and the inner pipe 14 (described in detail in FIG. 3) is arranged in the second exhaust pipe 12.
【００１３】図３は本発明に係る排気浄化装置の断面図
であり、第１排気管１１、第２排気管１２、第３排気管
１３及び内管１４は薄肉鋼板製円筒体であり、第１排気
管１１、第３排気管１３及び内管１４は互いに略同径で
ある。内管１４は多孔板で構成されている。すなわち、
内管１４の壁には内外面に連通する多数の孔からなる連
通部が形成されている。そして、内管１４は第２排気管
１２と同方向に延び、一端部１４ａが第２排気管１２の
一端部１２ａに差込まれて固定され、他端部１４ｂが第
２排気管１２に対して軸方向に伸縮可能とされている。
詳述すると、第２排気管１２の一端部１２ａ内に内管１
４の一端部１４ａが差込まれて仮止め溶接され、この一
端部１４ａが第１排気管１１の他端部１１ｂに差込ま
れ、この他端部１１ｂに一端部１２ａ，１４ａが全周溶
接にて固定されたものである。FIG. 3 is a cross-sectional view of the exhaust gas purification apparatus according to the present invention, in which the first exhaust pipe 11, the second exhaust pipe 12, the third exhaust pipe 13 and the inner pipe 14 are thin-walled steel plate cylinders. The first exhaust pipe 11, the third exhaust pipe 13, and the inner pipe 14 have substantially the same diameter. The inner tube 14 is composed of a perforated plate. That is,
The wall of the inner pipe 14 is formed with a communicating portion including a large number of holes communicating with the inner and outer surfaces. Then, the inner pipe 14 extends in the same direction as the second exhaust pipe 12, one end portion 14 a is inserted into the one end portion 12 a of the second exhaust pipe 12 and is fixed, and the other end portion 14 b is relative to the second exhaust pipe 12. It can be expanded and contracted in the axial direction.
More specifically, the inner pipe 1 is provided in the one end portion 12a of the second exhaust pipe 12.
4, one end portion 14a is inserted and temporarily welded, the one end portion 14a is inserted into the other end portion 11b of the first exhaust pipe 11, and the one end portions 12a and 14a are entirely welded to the other end portion 11b. It was fixed in.
【００１４】一方、第２排気管１２内には他端部１２ｂ
寄りに支持部材１６が装着され、この支持部材１６内に
内管１４の他端部１４ｂが挿入され、且つ軸方向に移動
可能に支持されている。このため、内管１４は第２排気
管１２に対して軸方向に伸縮可能であり、熱膨張に伴う
第２排気管１２と内管１４との間の伸び量の差を吸収で
きる。なお、支持部材１６は軸方向へ移動しないよう
に、第２排気管１２の膨出部１２ｃ内に嵌合されてい
る。第２排気管１２の中間部１２ｄは内管１４との間に
空隙を有した大きさである。内管１４は多孔を有した壁
面に、白金やロジウム等の触媒機能を有する貴金属を担
持されている（貴金属を含んだ溶液を塗布等で付着）。On the other hand, the other end 12b is provided in the second exhaust pipe 12.
A support member 16 is attached to the side, and the other end portion 14b of the inner pipe 14 is inserted into the support member 16 and is supported so as to be movable in the axial direction. Therefore, the inner pipe 14 is capable of expanding and contracting in the axial direction with respect to the second exhaust pipe 12, and it is possible to absorb the difference in expansion amount between the second exhaust pipe 12 and the inner pipe 14 due to thermal expansion. The support member 16 is fitted in the bulging portion 12c of the second exhaust pipe 12 so as not to move in the axial direction. The intermediate portion 12d of the second exhaust pipe 12 has a size having a space between it and the inner pipe 14. The inner tube 14 has a porous wall on which a precious metal such as platinum or rhodium having a catalytic function is carried (a solution containing the precious metal is attached by coating or the like).
【００１５】図４は図３の４−４線断面図であり、第１
排気管１１の他端部１１ｂに内管１４の一端部１４ａ及
び第２排気管１２の一端部１２ａが嵌合された状態を示
す。第２排気管１２は上下２分割した半割円筒を溶接に
て一体化したものである。FIG. 4 is a sectional view taken along line 4-4 of FIG.
The state where one end portion 14a of the inner pipe 14 and one end portion 12a of the second exhaust pipe 12 are fitted to the other end portion 11b of the exhaust pipe 11 is shown. The second exhaust pipe 12 is formed by welding a half-split cylinder, which is divided into upper and lower halves, by welding.
【００１６】図５は図３の５−５線断面図であり、内管
１４は薄板を円筒状に巻き、重ね合わせ面をスポット溶
接にて固定したものである。支持部材１６は波形板（コ
ルゲート板）を円筒状に巻き、重ね合わせ面をスポット
溶接にて固定したものであり、周方向に波形状を有す
る。このため、支持部材１６は弾性変形により、第２排
気管１２に対して径方向に伸縮可能であり、熱膨張に伴
う第２排気管１２と内管１４との間の伸び量の差を吸収
できる。FIG. 5 is a sectional view taken along line 5-5 of FIG. 3, in which the inner tube 14 is formed by winding a thin plate into a cylindrical shape and fixing the overlapping surface by spot welding. The support member 16 is formed by winding a corrugated plate (corrugated plate) in a cylindrical shape and fixing the overlapping surface by spot welding, and has a wavy shape in the circumferential direction. Therefore, the support member 16 is elastically deformable and expandable and contractible in the radial direction with respect to the second exhaust pipe 12, and absorbs the difference in the amount of expansion between the second exhaust pipe 12 and the inner pipe 14 due to thermal expansion. it can.
【００１７】次に、上記構成の内燃機関の排気浄化装置
作用を図３に基づき説明する。エンジンの排気はこの図
の白抜き矢印の方向に流れ、内管１４に担持された貴金
属と接触して反応し、浄化されて大気放出される。内管
１４は反応熱により第２排気管１２よりも高温になる。
内管１４はそれの一端部１４ａが第２排気管１２の一端
部１２ａに固定されているので、熱膨張に伴う第２排気
管１２と内管１４との間に伸び量の差が発生すると、他
端部１４ｂ側へ想像線にて示されるように伸び、伸び量
の差を吸収する。また、第２排気管１２と内管１４との
間の径方向の伸び量の差は、支持部材１６が弾性変形す
ることにより吸収される。内管１４の径が第１・第３排
気管１１，１３と略同一であり、細くならないので排気
が通過する際の圧力損失が小さい。また、管１１，１
３，１４の径が急激に変化しないので、排気が通過する
際の圧力損失が小さい。Next, the operation of the exhaust gas purifying apparatus for the internal combustion engine having the above structure will be described with reference to FIG. The exhaust gas of the engine flows in the direction of the outlined arrow in this figure, and reacts with the noble metal carried on the inner tube 14 to react therewith, and is purified and released into the atmosphere. The inner pipe 14 becomes hotter than the second exhaust pipe 12 due to the heat of reaction.
Since one end 14a of the inner pipe 14 is fixed to the one end 12a of the second exhaust pipe 12, when a difference in the amount of expansion occurs between the second exhaust pipe 12 and the inner pipe 14 due to thermal expansion. , And extends to the other end portion 14b side as indicated by an imaginary line, and absorbs the difference in the amount of extension. Further, the difference in the amount of radial extension between the second exhaust pipe 12 and the inner pipe 14 is absorbed by the elastic deformation of the support member 16. Since the diameter of the inner pipe 14 is substantially the same as that of the first and third exhaust pipes 11 and 13, and does not become thin, the pressure loss when exhaust gas passes is small. Also, the tubes 11, 1
Since the diameters of 3 and 14 do not change rapidly, the pressure loss when exhaust gas passes is small.
【００１８】図６（ａ）〜（ｆ）は本発明に係る第１排
気管と第２排気管との結合部分の変形例図である。
（ａ）は第２排気管１２の一端部１２ａと内管１４の一
端部１４ａとの各先端を揃えて、第１排気管１１の他端
部１１ｂに結合した構成である。（ｂ）は第１排気管１
１の他端部１１ｂに第２排気管１２の一端部１２ａを直
接結合し、他端部１１ｂと一端部１２ａとの間で内管１
４の一端部１４ａを挟持した構成である。（ｃ）は第１
排気管１１の他端部１１ｂの内径と、内管１４の一端部
１４ａの内径とが一致し、第２排気管１２の中間部１２
ｄが一端部１２ａと同径の構成である。（ｄ）は（ｃ）
の構成の変形例であり、第２排気管１２の一端部１２ａ
と内管１４の一端部１４ａとの各先端を揃えた構成であ
る。（ｅ）は（ｂ）の構成の変形例であり、第１排気管
１１の他端部１１ｂの内径と、内管１４の一端部１４ａ
の内径とが一致した構成である。（ｆ）は第１排気管１
１の他端部１１ｂと、第２排気管１２の一端部１２ａと
をフランジ２１，２１で結合した構成である。FIGS. 6 (a) to 6 (f) are modified examples of the connecting portion between the first exhaust pipe and the second exhaust pipe according to the present invention.
(A) is a configuration in which the ends of the one end 12 a of the second exhaust pipe 12 and the one end 14 a of the inner pipe 14 are aligned and coupled to the other end 11 b of the first exhaust pipe 11. (B) is the first exhaust pipe 1
One end portion 12a of the second exhaust pipe 12 is directly coupled to the other end portion 11b of the inner pipe 1 between the other end portion 11b and the one end portion 12a.
4 has a configuration in which one end 14a of the No. 4 is sandwiched. (C) is the first
The inner diameter of the other end 11b of the exhaust pipe 11 and the inner diameter of the one end 14a of the inner pipe 14 match, and the intermediate portion 12 of the second exhaust pipe 12
d has the same diameter as the one end portion 12a. (D) is (c)
2 is a modified example of the configuration of FIG.
The inner tube 14 and the one end portion 14a of the inner tube 14 have the same tip. (E) is a modified example of the configuration of (b). The inner diameter of the other end 11b of the first exhaust pipe 11 and the one end 14a of the inner pipe 14 are shown.
It has a configuration in which the inner diameter of (F) is the first exhaust pipe 1
The other end portion 11b of the first exhaust pipe 12 and the one end portion 12a of the second exhaust pipe 12 are connected by the flanges 21 and 21.
【００１９】図７（ａ）〜（ｃ）は本発明に係る第２排
気管と第３排気管との結合部分の変形例図である。
（ａ）は第２排気管１２の他端部１２ｂ内に第３排気管
１３の一端部１３ａを嵌合し溶接にて結合した構成であ
る。（ｂ）は第２排気管１２が第３排気管１３を兼ねた
構成である。（ｃ）は第２排気管１２の他端部１２ｂと
第３排気管１３の一端部１３ａとをフランジ２２，２２
で結合した構成である。FIGS. 7 (a) to 7 (c) are modified examples of the connecting portion between the second exhaust pipe and the third exhaust pipe according to the present invention.
(A) shows a configuration in which one end portion 13a of the third exhaust pipe 13 is fitted into the other end portion 12b of the second exhaust pipe 12 and joined by welding. In (b), the second exhaust pipe 12 also serves as the third exhaust pipe 13. (C) shows the other end 12 b of the second exhaust pipe 12 and the one end 13 a of the third exhaust pipe 13 with the flanges 22, 22.
It is a structure combined with.
【００２０】支持部材１６は内管１４の他端部１４ｂを
軸方向に伸縮可能且つ径方向に伸縮可能に支持するもの
であり、例えば、金属製メッシュを充填した構成や図８
に示す構成でもよい。図８（ａ），（ｂ）は本発明に係
る支持部材の変形例図である。（ａ）は内管１４を支持
する支持部材２３が、第２排気管１２側に膨出した弾性
湾曲片２３ａを備える構成である。（ｂ）は内管１４を
支持する支持部材２４が、内管１４側に膨出した弾性湾
曲片２４ａを備える構成である。The support member 16 supports the other end portion 14b of the inner pipe 14 so as to be expandable and contractible in the axial direction and in the radial direction. For example, a structure filled with a metal mesh or FIG.
The configuration shown in FIG. 8 (a) and 8 (b) are modification views of the support member according to the present invention. (A) is a configuration in which the support member 23 that supports the inner pipe 14 includes an elastic bending piece 23a that bulges toward the second exhaust pipe 12 side. (B) is a configuration in which the support member 24 that supports the inner tube 14 includes an elastic bending piece 24a that bulges toward the inner tube 14 side.
【００２１】なお、上記実施例において、排気装置５内
に排気通路と同方向に延びた内管１４を配置し、この内
管１４の一端部（この場合、一端部１４ａ又は他端部１
４ｂのうち固定された方を「一端部」と総称する。）
を、複数の排気管１１〜１３の結合部位又は消音器６の
結合部位に固定するものであればよい。例えば、内管１
４の一端部を消音器６の結合部位に固定してもよい。ま
た、内管１４は消音器６と略同径でもよい。更に、内管
１４の他端部（この場合、一端部１４ａ又は他端部１４
ｂのうち固定されない方を「他端部」と総称する。）
は、排気装置５に対して軸方向に伸縮可能であればよ
い。In the above embodiment, the inner pipe 14 extending in the same direction as the exhaust passage is arranged in the exhaust device 5, and one end portion (in this case, one end portion 14a or the other end portion 1) of the inner pipe 14 is arranged.
The fixed one of 4b is generically referred to as "one end". )
May be fixed to the connecting portion of the plurality of exhaust pipes 11 to 13 or the connecting portion of the silencer 6. For example, inner tube 1
One end of 4 may be fixed to the coupling part of the silencer 6. Further, the inner pipe 14 may have substantially the same diameter as the silencer 6. Further, the other end of the inner pipe 14 (in this case, the one end 14a or the other end 14
One of b that is not fixed is collectively referred to as "the other end". )
Need only be able to expand and contract with respect to the exhaust device 5 in the axial direction.
【００２２】[0022]
【発明の効果】本発明は上記構成により次の効果を発揮
する。請求項１は、排気装置内に排気通路と同方向に延
びた薄肉鋼板製内管を配置し、この薄肉鋼板製内管の壁
に内外面に連通する連通部を形成し、更に、薄肉鋼板製
内管の壁面に貴金属を担持し、且つ、薄肉鋼板製内管の
一端部を複数の薄肉鋼板製排気管の結合部位又は薄肉鋼
板製消音器の結合部位に固定したことにより、排気浄化
装置のエレメントである薄肉鋼板製内管を複数の薄肉鋼
板製排気管の結合部位又は薄肉鋼板製消音器に直接固定
したので、コーンを仲介させた従来の取付け構造に比較
して構造が簡単になり、部品数も少なく組付け作業も簡
単になる。The present invention has the following effects due to the above configuration. According to a first aspect of the present invention, an inner pipe made of a thin steel plate extending in the same direction as the exhaust passage is arranged in the exhaust device, and a communication portion communicating with the inner and outer surfaces is formed on a wall of the inner pipe made of the thin steel plate. An exhaust gas purification device by supporting a noble metal on the wall surface of the inner pipe made of steel and fixing one end of the inner pipe made of thin steel plate to a joint portion of a plurality of thin steel pipe exhaust pipes or a joint portion of a thin steel silencer Since the inner pipe made of thin steel plate, which is the element of, is directly fixed to the joint part of a plurality of thin steel plate exhaust pipes or to the silencer made of thin steel plate, the structure is simpler than the conventional mounting structure with a cone as an intermediary. The number of parts is small and the assembly work is easy.
【００２３】請求項２の内燃機関の排気浄化装置は、薄
肉鋼板製内管を、この薄肉鋼板製内管の一端部及び他端
部が隣接する薄肉鋼板製排気管又は薄肉鋼板製消音器と
略同径としたことにより、内管の径が排気装置と略同一
であり、細くならないので排気が通過する際の圧力損失
が小さく、また、管径が急激に変化しないので、排気が
通過する際の圧力損失が小さくなる。このため、排気浄
化装置を設けない場合と同程度の圧力損失で済むので、
内燃機関の性能に影響を与えることがない。According to a second aspect of the present invention, there is provided an exhaust gas purifying apparatus for an internal combustion engine, wherein an inner pipe made of a thin steel plate is provided with an exhaust pipe made of a thin steel plate or a silencer made of a thin steel plate in which one end and the other end of the inner pipe are made adjacent to each other. By making the diameters almost the same, the diameter of the inner pipe is almost the same as that of the exhaust device, and the pressure loss when the exhaust gas passes is small because it does not become thin, and since the pipe diameter does not change rapidly, the exhaust gas passes through. The pressure loss at the time becomes small. Therefore, the pressure loss is about the same as when the exhaust purification device is not provided.
It does not affect the performance of the internal combustion engine.
【００２４】請求項３の内燃機関の排気浄化装置は、薄
肉鋼板製内管の他端部を、排気装置に対して軸方向に伸
縮可能としたので、熱膨張に伴う内管と排気装置との間
の伸び量の差を吸収することが容易である。In the exhaust gas purifying apparatus for an internal combustion engine according to a third aspect of the present invention, the other end of the thin steel pipe inner tube is axially expandable / contractible with respect to the exhaust apparatus. It is easy to absorb the difference in the amount of elongation between the two.
【図１】本発明に係る内燃機関の排気浄化装置を装着し
た自動二輪車の側面図FIG. 1 is a side view of a motorcycle equipped with an exhaust emission control device for an internal combustion engine according to the present invention.
【図２】本発明に係る排気装置の側面図（消音器を外し
た姿）FIG. 2 is a side view of the exhaust device according to the present invention (a view without a silencer).
【図３】本発明に係る排気浄化装置の断面図FIG. 3 is a sectional view of an exhaust emission control device according to the present invention.
【図４】図３の４−４線断面図FIG. 4 is a sectional view taken along line 4-4 of FIG.
【図５】図３の５−５線断面図5 is a sectional view taken along line 5-5 of FIG.
【図６】本発明に係る第１排気管と第２排気管との結合
部分の変形例図FIG. 6 is a diagram showing a modification of the connecting portion between the first exhaust pipe and the second exhaust pipe according to the present invention.
【図７】本発明に係る第２排気管と第３排気管との結合
部分の変形例図FIG. 7 is a diagram showing a modification of the connecting portion between the second exhaust pipe and the third exhaust pipe according to the present invention.
【図８】本発明に係る支持部材の変形例図FIG. 8 is a modified example of the support member according to the present invention.
１…自動二輪車、３…内燃機関（エンジン）、４…排気
口、５…排気装置、６…消音器、１１…第１排気管、１
１ａ…一端部、１１ｂ…他端部、１２…第２排気管、１
２ａ…一端部、１２ｂ…他端部、１３…第３排気管、１
３ａ…一端部、１３ｂ…他端部、１４…内管、１４ａ…
一端部、１４ｂ…他端部、１６，２３，２４…支持部
材。DESCRIPTION OF SYMBOLS 1 ... Motorcycle, 3 ... Internal combustion engine (engine), 4 ... Exhaust port, 5 ... Exhaust device, 6 ... Silencer, 11 ... First exhaust pipe, 1
1a ... One end, 11b ... The other end, 12 ... Second exhaust pipe, 1
2a ... one end, 12b ... other end, 13 ... third exhaust pipe, 1
3a ... one end, 13b ... other end, 14 ... inner tube, 14a ...
One end, 14b ... Other end, 16, 23, 24 ... Support member.
Claims (3)
消音器を互いに結合して排気通路を形成した内燃機関の
排気装置において、前記排気装置内に前記排気通路と同
方向に延びた薄肉鋼板製内管を配置し、この薄肉鋼板製
内管の壁に内外面に連通する連通部を形成し、更に、前
記薄肉鋼板製内管の壁面に貴金属を担持し、且つ、前記
薄肉鋼板製内管の一端部を複数の薄肉鋼板製排気管の結
合部位又は薄肉鋼板製消音器の結合部位に固定したこと
を特徴とする内燃機関の排気浄化装置。1. An exhaust system for an internal combustion engine in which a plurality of exhaust pipes made of thin steel plates and a silencer made of thin steel plates are connected to each other to form an exhaust passage, and a thin wall extending in the same direction as the exhaust passage in the exhaust device. An inner pipe made of a steel plate is arranged, a communication portion communicating with the inner and outer surfaces is formed on the wall of the inner pipe made of the thin steel plate, further, a precious metal is carried on the wall surface of the inner pipe made of the thin steel plate, and An exhaust emission control device for an internal combustion engine, wherein one end of the inner pipe is fixed to a joint portion of a plurality of thin steel plate exhaust pipes or a joint portion of a thin steel plate silencer.
内管の一端部及び他端部が隣接する前記薄肉鋼板製排気
管又は薄肉鋼板製消音器と略同径であることを特徴とす
る請求項１記載の内燃機関の排気浄化装置。2. The thin-walled steel plate inner pipe has substantially the same diameter as the thin-walled steel plate exhaust pipe or the thin-walled steel plate silencer to which one end and the other end of the thin-walled steel plate inner pipe are adjacent. The exhaust emission control device for an internal combustion engine according to claim 1.
気装置に対して軸方向に伸縮可能であることを特徴とす
る請求項１又は請求項２記載の内燃機関の排気浄化装
置。3. The exhaust gas purification device for an internal combustion engine according to claim 1, wherein the other end of the thin steel pipe inner tube is axially expandable and contractable with respect to the exhaust device. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11098195A JP3231974B2 (en) | 1995-05-09 | 1995-05-09 | Exhaust gas purification device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11098195A JP3231974B2 (en) | 1995-05-09 | 1995-05-09 | Exhaust gas purification device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08303236A true JPH08303236A (en) | 1996-11-19 |
| JP3231974B2 JP3231974B2 (en) | 2001-11-26 |
Family
ID=14549384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11098195A Expired - Fee Related JP3231974B2 (en) | 1995-05-09 | 1995-05-09 | Exhaust gas purification device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3231974B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006299935A (en) * | 2005-04-21 | 2006-11-02 | Sankei Giken Kogyo Co Ltd | Exhaust system for engine |
| JP2014185592A (en) * | 2013-03-25 | 2014-10-02 | Honda Motor Co Ltd | Exhaust device of engine |
| WO2016152898A1 (en) * | 2015-03-26 | 2016-09-29 | 本田技研工業株式会社 | Motorcycle |
-
1995
- 1995-05-09 JP JP11098195A patent/JP3231974B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006299935A (en) * | 2005-04-21 | 2006-11-02 | Sankei Giken Kogyo Co Ltd | Exhaust system for engine |
| JP4630721B2 (en) * | 2005-04-21 | 2011-02-09 | 三恵技研工業株式会社 | Engine exhaust system |
| JP2014185592A (en) * | 2013-03-25 | 2014-10-02 | Honda Motor Co Ltd | Exhaust device of engine |
| WO2016152898A1 (en) * | 2015-03-26 | 2016-09-29 | 本田技研工業株式会社 | Motorcycle |
| JP2016183652A (en) * | 2015-03-26 | 2016-10-20 | 本田技研工業株式会社 | Motor cycle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3231974B2 (en) | 2001-11-26 |
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