JP2858326B2 - Exhaust system for a parallel four-cylinder four-cycle engine - Google Patents
Exhaust system for a parallel four-cylinder four-cycle engineInfo
- Publication number
- JP2858326B2 JP2858326B2 JP1229331A JP22933189A JP2858326B2 JP 2858326 B2 JP2858326 B2 JP 2858326B2 JP 1229331 A JP1229331 A JP 1229331A JP 22933189 A JP22933189 A JP 22933189A JP 2858326 B2 JP2858326 B2 JP 2858326B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- exhaust
- engine
- parallel
- rear end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、オートバイなどに用いる並列四気筒四サイ
クルエンジンの排気装置に関する。Description: TECHNICAL FIELD The present invention relates to an exhaust device for a parallel four-cylinder four-cycle engine used for motorcycles and the like.
オートバイなどに用いるエンジンでは、第５図乃至第
７図に示すように、＃１乃至＃４の四気筒を有する並列
四サイクルエンジンＡが用いられることがある。この場
合、＃１乃至＃４の排気孔に連結した排気管Ｂを、並列
に並べてエンジンＡの下側などに導き、後端を集合筒Ｃ
に挿入連結している。集合筒Ｃには中央に左右に分ける
仕切板Ｄが設けてあり、集合筒Ｃの後端は、集合筒Ｅを
介してマフラＦに連結するようにしている。尚、四気筒
四サイクルエンジンは、点火順序を＃１＃３＃４＃２の
ようにして、＃１と＃４の気筒との間に360゜の位相差
をもたせ、＃２と＃３の気筒との間に360゜の位相差を
もたせて点火している。As shown in FIGS. 5 to 7, a parallel four-stroke engine A having four cylinders # 1 to # 4 may be used in an engine used for a motorcycle or the like. In this case, the exhaust pipes B connected to the exhaust holes # 1 to # 4 are arranged side by side and guided to the lower side of the engine A, and the rear end of the exhaust pipe B
It is inserted and connected. The collecting cylinder C is provided with a partition plate D which is divided into left and right at the center, and the rear end of the collecting cylinder C is connected to the muffler F via the collecting cylinder E. In the four-cylinder four-cycle engine, the ignition sequence is set as # 1 # 3 # 4 # 2 to provide a phase difference of 360 ° between the # 1 and # 4 cylinders. It ignites with a 360 ° phase difference between the cylinders.
ところで、集合筒Ｃ内では、仕切板Ｄで仕切られた一
方に＃１と＃２の排気管Ｂの排気が入って合流し、他方
に＃３と＃４の排気管Ｂの排気が入って合流する。そし
て、集合筒Ｃの後端で全部の排気が合流してマフラＦに
流れる。ここで、＃１と＃２及び＃３と＃４は、それぞ
れ180゜の位相差があり、排気管Ｂの長さを長くできな
いような、長さが制約される場合に、中速域で互に排気
干渉を起して、エンジンの出力が低下する不都合があ
る。By the way, in the collecting cylinder C, the exhaust gas from the # 1 and # 2 exhaust pipes B enters and merges into one of the partitions separated by the partition plate D, and the exhaust gas from the # 3 and # 4 exhaust pipes B enters the other. Join. Then, all the exhaust gases merge at the rear end of the collecting cylinder C and flow to the muffler F. Here, # 1 and # 2 and # 3 and # 4 have a phase difference of 180 °, respectively, and when the length is restricted such that the length of the exhaust pipe B cannot be increased, in the middle speed range. There is an inconvenience that exhaust interference occurs with each other and the output of the engine is reduced.
この発明は、かかる点に鑑み、集合筒の前部で360゜
位相の異なる排気を先ず合流させ、排気の間隔を長くし
て排気干渉を防ぎ、エンジンの出力低下を防止できると
共に、集合筒の上下寸法を最小限に抑えることができる
並列四気筒四サイクルエンジンの排気装置を得ることを
目的とする。In view of the above, the present invention first combines exhaust gases having a phase difference of 360 ° at the front part of the collecting cylinder, thereby preventing exhaust interference by increasing the interval between the exhaust gases, preventing a decrease in engine output, and reducing An object of the present invention is to provide an exhaust device for a parallel four-cylinder four-cycle engine that can minimize vertical dimensions.
上記目的を達成するために、本発明の並列四気筒四サ
イクルエンジンの排気装置は、＃１気筒と＃４気筒、及
び＃２気筒と＃３気筒にそれぞれクランク角360゜の位
相差をもたせる一方、前記エンジン前部に並列して開口
する前記各気筒の排気孔に排気管を連結し、前記各排気
管を、エンジン前方から下方へと延出させ、エンジン下
側で集合筒により集合させた後、前記集合筒の後端に後
方へと延出する単一の集合管を連結するようにした並列
四気筒四サイクルエンジンの排気装置であって、前記各
気筒の排気管のうち、前記＃１〜＃３気筒に連結した排
気管は、下方に延出するに従って＃４気筒側へと偏倚す
ると共に、後端部がエンジン下方において略車体幅方向
に沿って順次並列し、前記＃４気筒に連結した排気管
は、下方に延出するに従って＃１気筒側へと偏倚して前
記＃１〜＃３気筒に連結した排気管とエンジン前方で交
差すると共に、後端部がエンジン下側で前記＃１気筒に
連結した排気管の側方に並列し、前記集合筒は、前端部
中央から後方へと延出する仕切り板によって内部空間を
車幅方向において分割形成してなり、前記集合筒に形成
した一方の分割空間には前記＃１及び＃４気筒に連結し
た排気管の後端部を挿入すると共に、他方の分割空間に
は＃２及び＃３気筒に連結した排気管の後端部を挿入
し、前記集合筒後端には、前記集合管を介してマフラ前
端を連結するようにしたものである。To achieve the above object, an exhaust system for a parallel four-cylinder four-stroke engine according to the present invention provides a # 1 cylinder and a # 4 cylinder and a # 2 cylinder and a # 3 cylinder with a phase difference of 360 ° in crank angle, respectively. An exhaust pipe was connected to an exhaust hole of each of the cylinders, which opened in parallel with the front of the engine, and each of the exhaust pipes was extended downward from the front of the engine and assembled by a collecting cylinder at the lower side of the engine. An exhaust system for a parallel four-cylinder four-stroke engine, wherein a single collecting pipe extending rearward is connected to a rear end of the collecting cylinder. The exhaust pipes connected to the # 1 to # 3 cylinders are deviated toward the # 4 cylinder as they extend downward, and the rear end portions are sequentially arranged in a line substantially in the width direction of the vehicle body below the engine. The exhaust pipe connected to The exhaust pipe connected to the # 1 to # 3 cylinders deviates toward the # 1 cylinder side and crosses in front of the engine, and the rear end of the exhaust pipe connected to the # 1 cylinder below the engine is located on the side of the exhaust pipe. The collecting tube is formed by dividing the internal space in the vehicle width direction by a partition plate extending rearward from the center of the front end, and one of the divided spaces formed in the collecting tube is the # 1. And the rear end of the exhaust pipe connected to the # 4 cylinder is inserted, and the rear end of the exhaust pipe connected to the # 2 and # 3 cylinders is inserted into the other divided space. The front end of the muffler is connected via the collecting pipe.
本発明において、集合筒の前部では、360゜位相差を
もたせた＃１と＃４の気筒の排気が合流すると共に、同
じく360゜の位相差をもたせた＃２と＃３の気筒の排気
が合流する。排気の間隔がクランク角360゜離れてい
て、間隔が長いので排気干渉を起すのを防止できる。そ
して、集合筒の後部で全部の排気が合流して、マフラに
流れて消音される。こうして、排気干渉によるエンジン
の出力低下を防止できる。また、本発明においては、各
排気管の後端部が車幅方向に並列しているため、これに
接続する集合筒の上下寸法最小限に抑えることができて
オートバイの最低地上高を高くすることができる。In the present invention, at the front of the collecting cylinder, the exhausts of the # 1 and # 4 cylinders having a phase difference of 360 ° merge, and the exhausts of the # 2 and # 3 cylinders also having a phase difference of 360 °. Merge. Exhaust intervals are 360 ° apart and crank intervals are long, preventing exhaust interference. Then, all the exhaust gas merges at the rear part of the collecting cylinder, flows to the muffler, and is silenced. Thus, it is possible to prevent the output of the engine from decreasing due to the exhaust interference. Further, in the present invention, since the rear ends of the exhaust pipes are arranged in parallel in the vehicle width direction, the vertical dimension of the collecting cylinder connected thereto can be minimized, and the minimum ground clearance of the motorcycle is increased. be able to.
以下、本発明の実施例を第１図乃至第４図によって説
明する。Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
＃１乃至＃４の四気筒を並列させた四サイクルエンジ
ン５は、点火順序を＃1,＃3,＃4,＃２又は、＃1,＃2,＃
4,＃３にして、＃１と＃４の気筒をクランク角度で360
゜の位相差をもたせ、同様に＃２と＃３の気筒を360゜
の位相差をもたせてある。エンジン５の前部に並列して
開口する＃１〜＃４の各気筒の排気孔に、各々排気管６
を連結する。＃１〜＃３の気筒の排気管６は並列させて
エンジン５の下側まで延してあり、図２に示すように、
下方に延出するに従って＃４気筒側へと偏倚すると共
に、後端部が図示１及び図３に示すように、略車体幅方
向に沿って順次並列している。＃４の気筒の排気管６
は、下方に延出するに従って、図２に示すように、＃１
気筒側へと偏倚して前記＃１〜＃３気筒に連結した排気
管６とエンジン５の前方で交差して後端部が＃１気筒に
連結した排気管の側方に並列している。集合筒７は、そ
の前端部中央から後方へと延出する仕切り板８によって
内部空間が車幅方向において左右に分割形成された平坦
な形状のものとなっている。そして、集合筒７の前端に
形成された一方の分割空間には、＃１気筒の排気管６と
＃４気筒の排気管６とを挿入連結し、他方の分割空間に
は＃２気筒の排気管６と＃３気筒の排気管６とを挿入連
結する。集合筒７の後端は、集合筒９を介してマフラ10
の前端に連結する。In the four-cycle engine 5 in which the four cylinders # 1 to # 4 are arranged in parallel, the ignition order is # 1, # 3, # 4, # 2 or # 1, # 2, #
4, # 3 and # 1 and # 4 cylinders at 360 ° crank angle
Similarly, the cylinders # 2 and # 3 are provided with a phase difference of 360 °. Exhaust pipes 6 are respectively provided in the exhaust holes of the cylinders # 1 to # 4, which open in parallel with the front part of the engine 5.
Concatenate. The exhaust pipes 6 of the cylinders # 1 to # 3 extend in parallel to the lower side of the engine 5, and as shown in FIG.
As it extends downward, it is biased toward the # 4 cylinder side, and the rear end portions are sequentially arranged side by side substantially along the vehicle body width direction as shown in FIGS. Exhaust pipe 6 of # 4 cylinder
As shown in FIG. 2, as it extends downward,
The exhaust pipe 6 biased to the cylinder side and connected to the # 1 to # 3 cylinders intersects in front of the engine 5 and has a rear end parallel to the side of the exhaust pipe connected to the # 1 cylinder. The collecting cylinder 7 has a flat shape in which the internal space is divided right and left in the vehicle width direction by a partition plate 8 extending rearward from the center of the front end. The exhaust pipe 6 of the # 1 cylinder and the exhaust pipe 6 of the # 4 cylinder are inserted and connected to one of the divided spaces formed at the front end of the collecting cylinder 7, and the exhaust gas of the # 2 cylinder is connected to the other divided space. The pipe 6 and the exhaust pipe 6 of the # 3 cylinder are inserted and connected. The rear end of the collecting cylinder 7 is connected to the muffler 10 through the collecting cylinder 9.
To the front end of
集合筒７内では、＃１の気筒の排気管６の排気と＃４
の気筒の排気管６の排気の360゜間隔がある排気が合流
し、又、＃２の気筒の排気管６と＃３の気筒の排気管６
の360゜間隔がある排気が合流する。そして、集合筒７
の後端で全部の排気が合流してマフラ10に流れる。In the collecting cylinder 7, the exhaust of the exhaust pipe 6 of the cylinder # 1 and the exhaust of the cylinder # 4
The exhausts of the exhaust pipes 6 of the cylinder # 6 are joined together at intervals of 360 °, and the exhaust pipes 6 of the cylinders # 2 and # 3 are joined together.
Exhausts with 360 ゜ intervals merge. And the collecting cylinder 7
At the rear end, all exhaust gases merge and flow to the muffler 10.
以上説明したように、この発明は、上述のように構成
したので、集合筒内で、先ず、排気タイミングが360゜
離れたものを合流させ、集合筒の後端で全部の排気をマ
フラに流すことができる。このため、排気のタイミング
が離れていて、排気の干渉を防ぐことができ、特に中速
域で発生するエンジンの出力低下を防止することができ
る。また、本発明においては、各排気管の後端部が車幅
方向に並列しているため、これに接続する集合筒の上下
寸法を最小限に抑えることができてオートバイの最低地
上高を高くすることができる。As described above, since the present invention is configured as described above, first, in the collecting cylinder, those whose exhaust timings are separated by 360 ° are merged, and all the exhaust is caused to flow to the muffler at the rear end of the collecting cylinder. be able to. For this reason, the timing of the exhaust is distant, so that the interference of the exhaust can be prevented, and in particular, it is possible to prevent the output of the engine from decreasing in the middle speed range. Further, in the present invention, since the rear ends of the exhaust pipes are arranged side by side in the vehicle width direction, the vertical dimension of the collecting cylinder connected thereto can be minimized, and the minimum ground clearance of the motorcycle can be increased. can do.
【図面の簡単な説明】 第１図乃至第４図は本発明の一実施例を示し、 第１図は排気管の側面図、 第２図は同正面図、 第３図は集合筒の縦断平面図、 第４図は全体側面図、 第５図乃至第７図は従来例を示し、 第５図は集合筒の縦断平面図 第６図は正面図、 第７図は側面図、 である。 ＃1,＃2,＃3,＃４……気筒、５……エンジン、６……排
気管、７……集合筒、８……仕切板、10……マフラ。BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 4 show an embodiment of the present invention, FIG. 1 is a side view of an exhaust pipe, FIG. 2 is a front view thereof, and FIG. FIG. 4 is an overall side view, FIGS. 5 to 7 show a conventional example, FIG. 5 is a vertical sectional plan view of a collecting cylinder, FIG. 6 is a front view, and FIG. 7 is a side view. . # 1, # 2, # 3, # 4 ... cylinder, 5 ... engine, 6 ... exhaust pipe, 7 ... collective cylinder, 8 ... partition plate, 10 ... muffler.
Claims (1)
気筒にそれぞれクランク角360゜の位相差をもたせる一
方、 前記エンジン前部に並列して開口する前記各気筒の排気
孔に排気管を連結し、前記各排気管を、エンジン前方か
ら下方へと延出させ、エンジン下側で集合筒により集合
させた後、前記集合筒の後端に後方へと延出する単一の
集合管を連結するようにした並列四気筒四サイクルエン
ジンの排気装置であって、 前記各気筒の排気管のうち、前記＃１〜＃３気筒に連結
した排気管は、下方に延出するに従って＃４気筒側へと
偏倚すると共に、後端部がエンジン下方において略車体
幅方向に沿って順次並列し、 前記＃４気筒に連結した排気管は、下方に延出するに従
って＃１気筒側へと偏倚して前記＃１〜＃３気筒に連結
した排気管とエンジン前方で交差すると共に、後端部が
エンジン下側で前記＃１気筒に連結した排気管の側方に
並列し、 前記集合筒は、前端部中央から後方へと延出する仕切り
板によって内部空間を車幅方向において分割形成してな
り、 前記集合筒に形成した一方の分割空間には前記＃１及び
＃４気筒に連結した排気管の後端部を挿入すると共に、
他方の分割空間には＃２及び＃３気筒に連結した排気管
の後端部を挿入し、 前記集合筒後端には、前記集合管を介してマフラ前端を
連結するようにしたことを特徴とする並列四気筒四サイ
クルエンジンの排気装置。1. A # 1 cylinder and a # 4 cylinder, and a # 2 cylinder and a # 3 cylinder.
Each cylinder is provided with a phase difference of 360 ° crank angle, and an exhaust pipe is connected to an exhaust hole of each cylinder which is opened in parallel with the front part of the engine, and each exhaust pipe extends downward from the front of the engine. An exhaust system for a parallel four-cylinder four-stroke engine, wherein the exhaust pipe is collected by a collecting cylinder under the engine, and a single collecting pipe extending rearward is connected to a rear end of the collecting cylinder. Out of the exhaust pipes of the respective cylinders, the exhaust pipes connected to the # 1 to # 3 cylinders are deviated toward the # 4 cylinder as they extend downward, and the rear end of the exhaust pipe substantially extends below the engine. The exhaust pipes connected to the # 4 cylinder are arranged in parallel in the width direction, and the exhaust pipes connected to the # 1 cylinder and the exhaust pipes connected to the # 1 to # 3 cylinders are shifted toward the # 1 cylinder side as they extend downward. And the rear end is under the engine. In parallel with the side of the exhaust pipe connected to the # 1 cylinder, the collecting cylinder has an internal space divided and formed in the vehicle width direction by a partition plate extending rearward from the center of the front end. The rear end of the exhaust pipe connected to the # 1 and # 4 cylinders is inserted into one of the divided spaces formed at
The rear end of the exhaust pipe connected to the # 2 and # 3 cylinders is inserted into the other divided space, and the front end of the muffler is connected to the rear end of the collecting cylinder via the collecting pipe. An exhaust system for a parallel four-cylinder four-cycle engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1229331A JP2858326B2 (en) | 1989-09-06 | 1989-09-06 | Exhaust system for a parallel four-cylinder four-cycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1229331A JP2858326B2 (en) | 1989-09-06 | 1989-09-06 | Exhaust system for a parallel four-cylinder four-cycle engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0392531A JPH0392531A (en) | 1991-04-17 |
| JP2858326B2 true JP2858326B2 (en) | 1999-02-17 |
Family
ID=16890478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1229331A Expired - Fee Related JP2858326B2 (en) | 1989-09-06 | 1989-09-06 | Exhaust system for a parallel four-cylinder four-cycle engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2858326B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007205154A (en) * | 2006-08-08 | 2007-08-16 | Toto Ltd | Edge material |
| KR101692706B1 (en) * | 2009-12-23 | 2017-01-04 | 홍콩 메이리셩 플로링 컴퍼니 리미티드 | Conveniently paved floor |
| JP6168853B2 (en) * | 2013-05-31 | 2017-07-26 | 本田技研工業株式会社 | Motorcycle exhaust system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2585568B2 (en) * | 1987-02-24 | 1997-02-26 | 本田技研工業株式会社 | Exhaust system for in-line 4-cylinder 4-cycle engine |
-
1989
- 1989-09-06 JP JP1229331A patent/JP2858326B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0392531A (en) | 1991-04-17 |
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