JPS60132015A - Device for introducing secondary air into exhaust pipe - Google Patents

Device for introducing secondary air into exhaust pipe

Info

Publication number
JPS60132015A
JPS60132015A JP58241768A JP24176883A JPS60132015A JP S60132015 A JPS60132015 A JP S60132015A JP 58241768 A JP58241768 A JP 58241768A JP 24176883 A JP24176883 A JP 24176883A JP S60132015 A JPS60132015 A JP S60132015A
Authority
JP
Japan
Prior art keywords
exhaust pipe
opening
air
exhaust
secondary air
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
Application number
JP58241768A
Other languages
Japanese (ja)
Other versions
JPH0625540B2 (en
Inventor
Magohei Tsukamoto
塚本　孫平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Priority to JP58241768A priority Critical patent/JPH0625540B2/en
Publication of JPS60132015A publication Critical patent/JPS60132015A/en
Publication of JPH0625540B2 publication Critical patent/JPH0625540B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/30—Arrangements for supply of additional air
    • F01N3/34—Arrangements for supply of additional air using air conduits or jet air pumps, e.g. near the engine exhaust port
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

PURPOSE:To feed secondary air sufficiently and smoothly by forming a cushion chamber having a sectional area greater than that of the opening of an exhaust pipe for a secondary air intake introduction pipe, in the vicinity of said opening. CONSTITUTION:An opening 12 for an air introduction pipe 10 for an exhaust pipe 6, is formed along the inner surface of the exhaust pipe 6, and a cushion chamber 13 is formed on the air introduction pipe 10, and adjacent to this opening 12. The sectional area of this cushion chamber 13 is formed greater than that of said opening 12, to store sufficient air. It is desirable that the opening 12 is formed at a distance of 50cm or less from an exhaust port 5.

Description

【発明の詳細な説明】 （産業上の利用分野） この発明は、自動二輪車等に搭載されるエンジンの排気
浄化装置に関し、より詳しくは排気管内へ二次空気を導
入するための装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an exhaust purification device for an engine mounted on a motorcycle or the like, and more particularly to a device for introducing secondary air into an exhaust pipe.

（従来技術） エンジンが過濃な空燃費で運転された場合には排気内に
含まれるＨＣやＣ０の量が増加することとなる。そこで
、このＨＣやＣ０を酸化させて排気を浄化するために、
この排気に二次空気が供給される場合がある。このよう
なエンジンの排気浄化装置では、一般に、エンジンのエ
キゾーストパイプに、二次空気吸入用の空気導管の一端
が連結され、同上空気導管の他端にはリード弁が設けら
れる。そして、排気の脈動による負圧によって、これら
リード弁や空気導管を介して外気がエキゾーストパイプ
内に供給される。(Prior Art) When an engine is operated with excessively rich air and fuel, the amount of HC and CO contained in the exhaust gas increases. Therefore, in order to purify the exhaust gas by oxidizing this HC and CO,
Secondary air may be supplied to this exhaust air. In such an engine exhaust purification device, one end of an air conduit for intake of secondary air is generally connected to the exhaust pipe of the engine, and a reed valve is provided at the other end of the air conduit. The negative pressure caused by the pulsation of the exhaust gas causes outside air to be supplied into the exhaust pipe through the reed valve and the air conduit.

」二記構成において、エキゾーストパイプ内に空気導管
端を突出させた場合（実公昭５２−３７６９６号公報）
には、この空気導管端が排気の流動抵抗を増大させたり
、排気の脈動による反射波に影響を与えたりするおそれ
がある。そこで、エキゾーストパイプに対する空気導管
の開口がこのエキゾーストパイプの内周面近傍に形成さ
れる場合がある。``In the case where the air conduit end protrudes into the exhaust pipe in the configuration described in Section 2 (Japanese Utility Model Publication No. 52-37696)
In this case, the end of the air conduit may increase the flow resistance of the exhaust gas or affect the reflected waves due to the pulsation of the exhaust gas. Therefore, the opening of the air conduit to the exhaust pipe may be formed near the inner circumferential surface of the exhaust pipe.

ところで、一方において、排気の浄化能力を向上させる
ために、空気導管や開口の断面積を太きくして二次空気
の供給量を増加させる場合がある。しかし、このように
形成すると、これらの空気導管や開口が前記したと同様
に排気の流動抵抗を増大させるなどの不都合を生じさせ
ることとなる。On the other hand, in order to improve the exhaust gas purification ability, the cross-sectional area of the air conduit or opening may be increased to increase the amount of secondary air supplied. However, if formed in this way, these air conduits and openings will cause problems such as increasing the flow resistance of the exhaust gas as described above.

（発明の目的） この発明は、上記のような事情に注目してなされたもの
で、排気の流動抵抗の増大や、排気の脈動による反射波
に影響を与えることを抑制するものでありながら、この
排気に対し二次空気を十分かつ円滑に供給することを目
的とする。(Objective of the Invention) This invention was made in view of the above-mentioned circumstances, and is intended to suppress the increase in flow resistance of exhaust gas and the influence on reflected waves due to pulsation of exhaust gas. The purpose is to supply sufficient and smooth secondary air to this exhaust gas.

（発明の構成） 上記目的を達成するだめのこの発明の特徴とするところ
は、エキゾーストパイプの内面近傍に空気導管の開口が
形成され、この開口近傍の空気導管にこの開口よりも断
面積の大きいクッションチャンバが形成された点にある
。(Structure of the Invention) The present invention is characterized in that an opening for the air conduit is formed near the inner surface of the exhaust pipe, and the air conduit near the opening has a cross-sectional area larger than that of the opening. At the point where a cushion chamber is formed.

（実施例） 以下、この発明の実施例を図面により説明する。(Example) Embodiments of the present invention will be described below with reference to the drawings.

エンジン、２は気化器、３はエアクリーナである。エン
ジン１の前部に形成された排気ポート５には排気管４が
連結される。この排気管４は、エンジン１から一旦前方
に突出した後、後方に向って反転するエキゾーストパイ
プ６と、このエキゾーストパイプ６の後端に連結され後
方に向うに従い直径が増大するサイレンサーフとを有し
ている。2 is a carburetor, and 3 is an air cleaner. An exhaust pipe 4 is connected to an exhaust port 5 formed at the front of the engine 1. The exhaust pipe 4 includes an exhaust pipe 6 that once protrudes forward from the engine 1 and then reverses toward the rear, and a siren surf that is connected to the rear end of the exhaust pipe 6 and whose diameter increases toward the rear. are doing.

」上記した排気管４内の排気は排気浄化装置８によって
浄化される。以下、この排気浄化装置８について説明す
る。上記エキゾーストパイプ６に二次空気吸入用の空気
導管１０の一端が連結され、同上空気導管１０の他端に
はり一ド弁１１が設けられる。このリード弁１１はエキ
ゾーストパイプ６に向う方向にのみ外気を流動させる。The exhaust gas in the exhaust pipe 4 described above is purified by the exhaust purification device 8. This exhaust gas purification device 8 will be explained below. One end of an air conduit 10 for intake of secondary air is connected to the exhaust pipe 6, and a valve 11 is provided at the other end of the air conduit 10. This reed valve 11 allows outside air to flow only in the direction toward the exhaust pipe 6.

上記エキゾーストパイプ６に対する空気導管１Ｏの開口
１２がエキゾーストパイプ６の内面に沿って形成され、
この間口１２に隣接して空気道　（管１０にクッション
チャンバ１３が形成される。An opening 12 of the air conduit 1O to the exhaust pipe 6 is formed along the inner surface of the exhaust pipe 6,
Adjacent to this opening 12, an airway (cushion chamber 13 is formed in the pipe 10).

このクッションチャンバ１３の断面積は」上記開口１２
のそれよりも大きく形成され、十分の空気が貯留される
。上記の場合、上記開口１２は排気ポート５から　５０
０皿以内に形成することが好ましい。The cross-sectional area of this cushion chamber 13 is ``the opening 12''.
It is formed larger than that of , and enough air is stored. In the above case, the opening 12 is from the exhaust port 5 50
It is preferable to form within 0 plates.

そして、排気の脈動による負圧によって、これらリード
弁ｌｌや空気導管１０を介して二次空気たる外気がエキ
ゾーストパイプ６内に供給される。Then, external air, which is secondary air, is supplied into the exhaust pipe 6 through the reed valve ll and the air conduit 10 by the negative pressure caused by the pulsation of the exhaust.

なお以上は図示の例によるがリード弁１１に代えてエア
ポンプを設けてもよい。Although the above is based on the illustrated example, an air pump may be provided in place of the reed valve 11.

以下の各図は他の実施例を示し、上記実施例と異なる構
成につき説明する。The following figures show other embodiments, and different configurations from the above embodiments will be explained.

第２図は第２実施例を示し、クッションチャンバ１３は
開口１２から少し離れた位置に形成されている。FIG. 2 shows a second embodiment, in which the cushion chamber 13 is formed at a position slightly away from the opening 12.

第３図と第４図は第３実施例を示し、開口１２はエキゾ
ーストパイプ６に形成された複数の円形貫通孔１４で構
成される。この場合、空気導管ｌＯの通路断面積ａと、
開口１２近傍のエキゾーストパイプ６の通路断面積Ａと
の関係は次式で示される。3 and 4 show a third embodiment, in which the opening 12 is comprised of a plurality of circular through holes 14 formed in the exhaust pipe 6. FIG. In this case, the passage cross-sectional area a of the air conduit lO,
The relationship with the passage cross-sectional area A of the exhaust pipe 6 near the opening 12 is expressed by the following equation.

ａ／ＡＸ１００≧８．５（％） また、上記貫通孔１４は四角、三角などでもよいが、幅
と高さの比が１＝２以下とされる。そして、貫通孔１４
の各々の面積をａＩ　＋　ａ２　”　”・ａｎ　（ｎは
２以上の整数）としたとき、ａ≦ａ１＋ａ２＋中中中＋
ａｎ とされる。a/AX100≧8.5 (%) The through hole 14 may be square, triangular, etc., but the width to height ratio is 1=2 or less. And through hole 14
When the area of each is aI + a2 ” ”・an (n is an integer of 2 or more), a≦a1+a2+middle+
It is said to be an.

更に、貫通孔１４のうちで最大面積のものをａｌ（ｉは
２以上で　。以下の整数）とすると、ａ　Ｉ／　Ａ　Ｘ
　１００≦５（％） とされる。Furthermore, if the one with the largest area among the through-holes 14 is al (i is an integer between 2 and below), a I/A
100≦5(%).

第５図と第６図は第４実施例を示し、開口１２はエキゾ
ーストパイプ６の軸方向に長手の長孔１６とされる。こ
の場合、空気導管１０の通路断面積ａと、開口１２近傍
のエキゾーストパイプ６の通路断面積Ａとの関係は次式
で示される。5 and 6 show a fourth embodiment, in which the opening 12 is an elongated hole 16 extending in the axial direction of the exhaust pipe 6. FIG. In this case, the relationship between the passage cross-sectional area a of the air conduit 10 and the passage cross-sectional area A of the exhaust pipe 6 near the opening 12 is expressed by the following equation.

ａ／ＡＸ１００≧６．５（％） また、上記長孔１６は幅と高さの比がｌ：２以上とされ
る。そして、長孔１６の各々の面積をｂＩ　ｌｂ２　”
”’ｎ　（ｎはｌ以−にの整数）としたとき、 ａ≦ｂ、＋ｂ２　＋・・・ｂｎ とされる。a/AX100≧6.5 (%) Moreover, the width to height ratio of the elongated hole 16 is 1:2 or more. Then, the area of each long hole 16 is bI lb2 ”
``'n (n is an integer greater than or equal to l), a≦b, +b2 +...bn.

更に、長孔１６のうちで最大幅のものをｄよ（ｌはｌ以
」ニで　。以下の整数）とすると、πｄ１２／４ＡＸ１
００≦１（％） とされる。Furthermore, if the largest width of the long holes 16 is d (l is an integer less than or equal to l), then πd12/4AX1
00≦1(%).

第７図から第９図はそれぞれ第５実施例から第７実施例
を示し、長孔１６がエキゾーストパイプ６の軸方向に直
角とされ、もしくは傾斜した形状とされ、もしくは、複
数の場合が示される。他の構成は前記第４実施例と同様
である。7 to 9 show fifth to seventh embodiments, respectively, in which the elongated hole 16 is perpendicular to the axial direction of the exhaust pipe 6, has an inclined shape, or shows a plurality of cases. It will be done. The other configurations are the same as those of the fourth embodiment.

第１０図は第８実施例を示し、エンジンｌの排気ボート
５にこの排気ボー１・５を開閉する回転式の絞り弁１８
が設けられる。１９は吸気ポー１・、２０はピストン、
２１は点火プラグである。FIG. 10 shows an eighth embodiment, in which a rotary throttle valve 18 is provided in the exhaust boat 5 of the engine 1 to open and close the exhaust boats 1 and 5.
will be provided. 19 is intake port 1, 20 is piston,
21 is a spark plug.

一方、エキシースＩ・バイブロ近傍の空気導管１０にこ
の空気導管１０を開閉するバタフライ式の空気調整弁２
２が設けられ、空気導管１０の内周面と空気調整弁２２
どの間に開口１２が形成される。これら絞り弁１８と空
気調整弁２２は共にエンジンｌの回転数に同期して開閉
動作されるもので、例えば点火信号により段階的に開閉
せしめられる。On the other hand, a butterfly-type air regulating valve 2 that opens and closes the air conduit 10 near the Exis I/Vibro
2 is provided, and the inner peripheral surface of the air conduit 10 and the air regulating valve 22
An opening 12 is formed in between. The throttle valve 18 and the air adjustment valve 22 are both opened and closed in synchronization with the rotational speed of the engine 1, and are opened and closed in stages according to, for example, an ignition signal.

即ち、低速の場合には、絞り弁１８は所定の排気等価管
長を得るため閉となるように作動し、一方、空気調整弁
２２は二次空気を多く供給するため開くように作動する
。また、高速となる場合には、−１−記と逆に絞り弁１
８は開となるように作動し、空気調整弁２２は二次空気
の供給を減らすべく閉となるように作動する。That is, at low speeds, the throttle valve 18 operates to close to obtain a predetermined equivalent exhaust pipe length, while the air adjustment valve 22 operates to open to supply a large amount of secondary air. In addition, when the speed is high, the throttle valve 1
8 is actuated to be open, and air regulating valve 22 is actuated to be closed to reduce the supply of secondary air.

（発明の効果） この発明によれば、開口近傍の空気導管にこの開口より
も断面積の大きいクッションチャン／へか形成されたた
め、クッションチャンバ内に十分の空気を貯留させるこ
とができる。従って、このクンジョンチャン八からエキ
シースｉ・パイプ内に空気を供給してもこのクッション
チャンバ内の圧力変動は小さく抑えられる。そのため、
排気の脈動による負圧でこの空気を十分にかつ円滑に供
給することができる。そして、このようにクッションチ
ャンバを形成することによって空気の供給が十分になさ
れるため、このクッションチャンバの容量を大きくする
ことにより開口を小さく絞ることが可能である。従って
、この開口に原因して排気の流動抵抗が増大したり、排
気の反射波に影響を与えることは確実に抑制される。(Effects of the Invention) According to the present invention, a cushion chamber/chamber having a larger cross-sectional area than the opening is formed in the air conduit near the opening, so that sufficient air can be stored in the cushion chamber. Therefore, even if air is supplied into the Exis i-pipe from the Kunjeong chamber, the pressure fluctuation within the cushion chamber can be suppressed to a small level. Therefore,
This air can be sufficiently and smoothly supplied by the negative pressure generated by the pulsation of exhaust gas. By forming the cushion chamber in this way, a sufficient supply of air can be achieved, so by increasing the capacity of the cushion chamber, it is possible to narrow the opening to a small size. Therefore, it is reliably suppressed that the flow resistance of the exhaust gas increases or that the reflected waves of the exhaust gas are affected by the opening.

【図面の簡単な説明】[Brief explanation of drawings]

図はこの発明の実施例を示し、第１図は第１実施例を示
す全体側面図、第２図は第２実施例を示す部分側面図、
第３図と第４図は第３実施例を示し第３図は要部側面断
面図、第４図は第３図の■−■線矢視図、第５図と第６
図は第４実施例を示し第５図は要部側面断面図、第６図
は第５図の■−■線矢視図、第７図から第９図は第５実
施例から第７実施例を示す第６図の相当図、第１０図は
第８実施例を示す全体側面部分簡略図である。 ｌ・・エンジン、６・・エキゾーストパイプ、８・・排
気浄化装置、１０・・空気導管、１２・・開口、１３・
Φクッションチャンバ。The figures show embodiments of the present invention, FIG. 1 is an overall side view showing the first embodiment, FIG. 2 is a partial side view showing the second embodiment,
Figures 3 and 4 show the third embodiment, Figure 3 is a side sectional view of the main part, Figure 4 is a view taken along the line ■-■ in Figure 3, and Figures 5 and 6.
The figure shows the fourth embodiment, FIG. 5 is a side sectional view of the main part, FIG. 6 is a view taken along the line ■-■ in FIG. 5, and FIGS. 7 to 9 show the fifth to seventh embodiments. A view corresponding to FIG. 6 showing an example, and FIG. 10 is a partial simplified overall side view showing the eighth embodiment. l... Engine, 6... Exhaust pipe, 8... Exhaust purification device, 10... Air conduit, 12... Opening, 13...
Φ cushion chamber.

Claims (1)

【特許請求の範囲】[Claims] ■、エンジンのエキゾーストパイプに二次空気吸入用の
空気導管が連結され、同上エキゾーストパイプに対する
この空気導管の開口がエキゾーストパイプの内面近傍に
形成されたエンジンの排気浄化装置←こおいて、上記開
口近傍の空気導管にこの開口よりも断面積の大きいクッ
ションチャンバが形成されたことを特徴とする排気管内
への二次空気導入装置。■ An air conduit for secondary air intake is connected to the exhaust pipe of the engine, and the opening of this air conduit to the exhaust pipe is an engine exhaust purification device formed near the inner surface of the exhaust pipe. A device for introducing secondary air into an exhaust pipe, characterized in that a cushion chamber having a larger cross-sectional area than the opening is formed in a nearby air conduit.
JP58241768A 1983-12-21 1983-12-21 Secondary air introduction device into the exhaust pipe Expired - Lifetime JPH0625540B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58241768A JPH0625540B2 (en) 1983-12-21 1983-12-21 Secondary air introduction device into the exhaust pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58241768A JPH0625540B2 (en) 1983-12-21 1983-12-21 Secondary air introduction device into the exhaust pipe

Publications (2)

Publication Number Publication Date
JPS60132015A true JPS60132015A (en) 1985-07-13
JPH0625540B2 JPH0625540B2 (en) 1994-04-06

Family

ID=17079235

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58241768A Expired - Lifetime JPH0625540B2 (en) 1983-12-21 1983-12-21 Secondary air introduction device into the exhaust pipe

Country Status (1)

Country Link
JP (1) JPH0625540B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4767931A (en) * 1986-12-17 1988-08-30 Hitachi, Ltd. Ion beam apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58170813A (en) * 1982-04-01 1983-10-07 Nippon Soken Inc Secondary air supplying device for internal-combustion engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58170813A (en) * 1982-04-01 1983-10-07 Nippon Soken Inc Secondary air supplying device for internal-combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4767931A (en) * 1986-12-17 1988-08-30 Hitachi, Ltd. Ion beam apparatus

Also Published As

Publication number Publication date
JPH0625540B2 (en) 1994-04-06

Similar Documents

Publication Publication Date Title
JPS61116021A (en) Engine intake-air device
JPS59514A (en) Muffler of exhaust system in internal-combustion engine
US5161492A (en) Intake system for multi-cylinder engine
JPS59208122A (en) Duplex suction system for internal-combustion engine
US4207738A (en) Exhaust gas purifying system for multi-cylinder internal combustion engine
JPH0263092B2 (en)
CA2331207A1 (en) Outboard engine system
JPH02199265A (en) Suction structure for engine
JPH0420982Y2 (en)
JPH03271558A (en) Intake device of multiplecylinder v-engine
JPH0315777Y2 (en)
JPS58128419A (en) Intake device for internal-combustion engine
JPS6335167Y2 (en)
JPH0640906Y2 (en) Engine intake system that uses intake inertia
JPS6128714A (en) Intake device of internal-combustion engine
JP2599254B2 (en) V-type engine intake system
JP2725289B2 (en) Outboard exhaust system
JP2533172Y2 (en) Intake manifold for internal combustion engine
JPH05141283A (en) Sensing structure in throttle body for internal combustion engine
JPH0323315A (en) Suction device for v-engine
JPS6013968A (en) Suction device of engine for motorcycle
JPS6235022A (en) Intake device for engine
JPS61277863A (en) Suction device in motorcycle and the like
JPH02199266A (en) Suction structure for engine
JPS59108816A (en) Secondary air feeder for engine