WO2018180272A1 - Saddle-type vehicle exhaust device - Google Patents

Saddle-type vehicle exhaust device Download PDF

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Publication number
WO2018180272A1
WO2018180272A1 PCT/JP2018/008519 JP2018008519W WO2018180272A1 WO 2018180272 A1 WO2018180272 A1 WO 2018180272A1 JP 2018008519 W JP2018008519 W JP 2018008519W WO 2018180272 A1 WO2018180272 A1 WO 2018180272A1
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WO
WIPO (PCT)
Prior art keywords
exhaust pipe
muffler
exhaust
front cover
downstream
Prior art date
Application number
PCT/JP2018/008519
Other languages
French (fr)
Japanese (ja)
Inventor
侑史 倉澤
Original Assignee
本田技研工業株式会社
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 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to JP2019509101A priority Critical patent/JP6700483B2/en
Publication of WO2018180272A1 publication Critical patent/WO2018180272A1/en
Priority to PH12019502153A priority patent/PH12019502153A1/en

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    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • 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

Definitions

  • the present invention relates to an exhaust system for a straddle-type vehicle, wherein an exhaust pipe is connected to a muffler, and a downstream end of the exhaust pipe extends into the muffler.
  • Patent Document 1 As an exhaust system for a saddle-ride type vehicle, as disclosed in Patent Document 1, there is one in which an exhaust pipe which is extended and bent in a muffler is held by a holding member provided in the muffler. .
  • a holding member provided in the muffler.
  • the exhaust system for a straddle-type vehicle according to the present invention was invented to overcome the above problems, and its object is to cope with the need to shorten the exhaust pipe length and reduce the number of parts. It is an object of the present invention to provide an exhaust system for a straddle-type vehicle which can support the exhaust pipe in the exhaust muffler with a simpler structure.
  • the present invention overcomes the above problems, and comprises an exhaust pipe for exhausting the exhaust gas of an internal combustion engine, and a muffler connected to the downstream side of the exhaust pipe, and the downstream portion of the exhaust pipe is disposed inside the muffler
  • the exhaust pipe In the exhaust system of a straddle-type vehicle, the exhaust pipe extends rearward from the front of the vehicle in the muffler, and then bends and extends toward the front of the vehicle, and the downstream end of the exhaust pipe
  • an exhaust system of a straddle-type vehicle supported by an exhaust pipe support provided on an outer shell of the muffler.
  • the present invention copes with the case where the exhaust pipe length needs to be shortened because the exhaust pipe disposed in the muffler changes the extending direction and is supported by the exhaust pipe support provided on the outer shell of the muffler. Because the exhaust pipe is supported using existing parts, the number of parts can be reduced to make the structure simpler, reducing the manufacturing cost and reducing the weight of the exhaust system as a whole. Can be
  • a partition is disposed in the muffler to divide the muffler into a first expansion chamber and a second expansion chamber, and the entire muffler inner portion disposed in the muffler of the exhaust pipe is the first expansion chamber. Can be placed.
  • the entire muffler device can be miniaturized by configuring the entire portion of the exhaust pipe in the muffler disposed in the muffler to be disposed in the first expansion chamber.
  • the outer shell of the muffler includes a muffler body and a front cover for closing a front opening of the muffler body, the exhaust pipe support is provided on the front cover, and the front cover is provided with the internal combustion engine
  • a stay may be provided to connect the muffler, and the stay may cover the exhaust pipe support of the front cover.
  • the exhaust pipe can be supported by the front cover without impairing the appearance without the exhaust pipe support being visually recognized from the outside.
  • the exhaust pipe support portion of the front cover is a convex portion from which a part of the muffler protrudes, and the downstream end of the exhaust pipe is one of the convex portion and the downstream end of the exhaust pipe being the other Can be fitted and supported.
  • the downstream end of the exhaust pipe can be effectively supported by the front cover with a simple structure.
  • the downstream opening of the downstream end of the exhaust pipe may be closed by a closing portion, and a communication hole communicating with the inside of the muffler may be provided in the downstream part of the exhaust pipe.
  • the exhaust pipe and the muffler can be closed even if the downstream end disposed inside the muffler is supported by the front cover and closed. It can communicate.
  • the exhaust gas can be diffused into the muffler by providing a plurality of communication holes in the downstream portion of the exhaust pipe.
  • the exhaust system of the saddle-ride type vehicle according to the present invention can cope with the case where the exhaust pipe length needs to be shortened, and since the exhaust pipe is supported using the existing parts, the number of parts can be reduced.
  • the structure can be simplified and the manufacturing cost can be reduced and the weight of the entire exhaust system can be reduced.
  • FIG. 1 is a right side view of a motorcycle equipped with an exhaust system of a straddle-type vehicle according to a first embodiment of the present invention.
  • FIG. 2 is a perspective view of an exhaust device mounted on a motorcycle, viewed obliquely from above to the right.
  • FIG. 2 is a view vertically cutting an exhaust device mounted on a motorcycle. It is a cross-sectional view of an exhaust device. It is a longitudinal cross-sectional view of an exhaust system. It is a VI-VI arrow line view of FIG.
  • FIG. 7 is a cross-sectional view taken along line VII-VII of FIG.
  • FIG. 1 is a right side view of a motorcycle 1 as an example of a straddle-type vehicle equipped with an exhaust system 20 of a straddle-type vehicle according to a first embodiment of the present invention.
  • the motorcycle 1 includes a frame 2 oriented in the front-rear direction of the vehicle, the frame 2 being fixed to a head pipe 3 provided at the front end, and extending downward from the head pipe 3 to a down frame member 2a
  • a pair of left and right lower frame members 2b horizontally extending from the lower end of the frame member 2a to the rear and a pair of left and right seat frame members 2c extending diagonally upward from the rear end of the lower frame member 2b.
  • the head pipe 3 movably supports a front fork 4 supporting the front wheel 5.
  • the power unit 10 of the motorcycle 1 is an integral type of the internal combustion engine 11 and the power transmission device 12, and is a unit swing type power unit 10 that can swing with respect to the frame 2.
  • the internal combustion engine 11 is a forced air-cooling single cylinder internal combustion engine, and is located at the center in the left-right direction of the vehicle.
  • the power transmission device 12 includes a V-belt type all-purpose transmission and a transmission gear device (not shown), is connected to the left side of the internal combustion engine 11, and is disposed at the left rear of the motorcycle 1.
  • the rear wheel 6 of the motorcycle 1 is connected to a rotary shaft 7 at the rear end of the power transmission device 12.
  • An intake manifold having a fuel injection valve (not shown), a throttle body, a connecting tube, and an air cleaner are sequentially connected to a cylinder portion (not shown) of the internal combustion engine 11.
  • the outside air drawn in from the air cleaner is mixed with the fuel sprayed from the fuel injection valve to form an air-fuel mixture, and is sent to the cylinder portion of the internal combustion engine 11 for combustion.
  • An exhaust device 20 is connected to the exhaust gas discharge side of the internal combustion engine 11.
  • the exhaust system 20 is connected to an exhaust port (not shown) of the internal combustion engine 11 and is bent and extended from the lower front to the rear, and then bent and extended toward the front of the vehicle to exhaust the exhaust gas of the internal combustion engine 21, an exhaust gas catalyst device 25 disposed in the middle of the exhaust pipe 21, and a muffler 30 connected to the downstream side of the exhaust pipe 21.
  • the exhaust pipe 21 includes an upstream exhaust pipe 22 connected to an exhaust port (not shown) of the internal combustion engine 11, an intermediate exhaust pipe 23, and a downstream exhaust pipe 24.
  • a catalytic device 25 is provided between the upstream exhaust pipe 22 and the intermediate exhaust pipe 23.
  • the upstream side exhaust pipe 22 is further curved rightward from the lower side to the left side of the internal combustion engine 11, and the downstream end is connected to the left side of the catalyst device 25.
  • the catalyst device 25 is disposed such that the longitudinal direction is in the vehicle width direction, and the right end of the catalyst device is connected to the upstream end 23 a of the intermediate exhaust pipe 23.
  • the intermediate exhaust pipe 23 extends rearward of the vehicle.
  • the downstream end 23 b of the intermediate exhaust pipe 23 is connected to the upstream end of the downstream exhaust pipe 24 supported by the muffler 30 and 24 a as shown in FIG. 2.
  • the downstream exhaust pipe 24 includes a curved portion 24 b and is formed in a substantially U-shape.
  • the downstream end 24 c of the downstream side exhaust pipe 24 is supported by an exhaust pipe support 33 b provided on a front cover 33 described later.
  • the downstream end 24c of the downstream side exhaust pipe 24 is formed with a plurality of communication holes 24e that communicate the exhaust pipe 21 with the interior of a muffler 30 described later.
  • the muffler 30 is attached to the rear of the power unit 10 through the muffler support stay 19 so as to be located on the right side of the motorcycle 1 and obliquely upward. Exhaust gas exhausted from the internal combustion engine 11 passes through the exhaust pipe 21 and the catalyst device 25 and is sent to the muffler 30 to be exhausted to the outside air.
  • FIG. 5 is a longitudinal cross-sectional view of the exhaust system 20, and similarly to FIG. 4, shows the muffler body 31 serving as the outer shell as a cross section, and the inside is shown without being cut.
  • the muffler 30 of the exhaust system 20 has a muffler body 31 as its outer shell, and a partition 36 that divides the inside of the muffler body 31 into a first expansion chamber 40 and a second expansion chamber 41.
  • a communication pipe 37 for communicating the first expansion chamber 40 with the second expansion chamber 41 and a tail pipe 38 for discharging exhaust gas from the muffler 30 to the outside air are provided.
  • Almost all of the downstream side exhaust pipe 24 of the exhaust pipe 21 except the upstream end 24 a are disposed inside the muffler body 31.
  • the muffler body 31 includes a longitudinally elongated cylindrical muffler body 32 having an elliptical cross-sectional shape, and the front cover 33 is configured to close the front opening 32 a and the rear opening 32 b of the muffler body 32. And the tail cover 35 is fixed by welding.
  • an exhaust pipe insertion portion 33a into which the upstream end portion 24a of the downstream side exhaust pipe 24 is inserted is formed.
  • the exhaust pipe insertion portion 33 a is formed so as to protrude outward, and the upstream end portion 24 a of the downstream side exhaust pipe 24 is inserted and fixed to the front cover 33 by welding.
  • a cylindrical convex portion 33b is formed at an upper portion of the front surface of the front cover 33.
  • a portion of the cylindrical convex portion 33b protrudes toward the inside, and the convex portion 33b is engaged with the downstream end 24c of the downstream side exhaust pipe 24.
  • an exhaust pipe support 33b The inner diameter of the exhaust pipe support 33b and the outer diameter of the downstream end 24c of the downstream exhaust pipe 24 are set to substantially the same size, and the downstream end 24c is fitted to the exhaust pipe support 33b.
  • a cap 34 is fitted in the downstream opening 24 d of the downstream exhaust pipe 24, and the cap 34 is fixed to the exhaust pipe support 33 b of the front cover 33 by welding together with the downstream end 24 c.
  • the downstream opening 24 d is closed, and the downstream end 24 c of the downstream exhaust pipe 24 is supported by the front cover 33.
  • the front cover 33 is formed with the convex portion 33b that protrudes inward, and the downstream end portion 24c of the downstream side exhaust pipe 24 is fitted and supported by the convex portion 33b.
  • the exhaust pipe supporting portion 33b as the convex portion 33b is not formed on the cover 33, but the downstream end 24c of the downstream side exhaust pipe 24 abuts against the inner wall of the front cover 33 and abuts, and the downstream end of the downstream side exhaust pipe 24
  • the downstream end 24 c may be supported by the front cover 33 by welding the 24 c to the inner wall of the front cover 33.
  • the interior of the muffler body 31 is partitioned by a partition wall 36.
  • the partition wall 36 includes a wall portion 36a formed in substantially the same shape as the cross-sectional shape of the muffler body 31, and the periphery of the wall portion 36a is perpendicular to the wall portion 36a.
  • a mounting edge portion 36b having a predetermined width is provided, the mounting edge portion 36b is fixed to the inner wall of the muffler body 31, and the interior of the muffler body 31 is longitudinally separated rearward by the partition wall 36, the first expansion chamber 40, the first The expansion chamber 41 is divided into two chambers.
  • a communication pipe insertion portion 36c which is cylindrically protruded forward is provided on the upper left side of the wall portion 36a.
  • the first expansion chamber 40 and the second expansion chamber 41 inside the muffler body 31 are communicated with each other by the communication pipe 37 which is inserted into the communication pipe insertion portion 36 c of the partition 36 and welded to the partition.
  • a tail pipe insertion portion 35a which protrudes in a cylindrical shape is provided rearward, and the tail pipe 38 is inserted into and welded to the tail pipe insertion portion 35a.
  • the second expansion chamber 41 is communicated with the outside air by the tail pipe 38, and the exhaust gas discharged from the internal combustion engine 11 is discharged to the rear of the vehicle.
  • the downstream side exhaust pipe 24 of the downstream part of the exhaust pipe 21 is disposed inside the muffler 30, and a part of the upstream side of the downstream side exhaust pipe 24 extends from the exhaust pipe insertion portion 33 a of the front cover 33 to the muffler 30.
  • the other portion is an inner portion 24g of the muffler disposed inside the muffler 30.
  • the entire muffler inner portion 24 g is disposed in the first expansion chamber 40.
  • a pair of muffler support stays 19 are attached to the front cover 33 at the front of the muffler 30 by welding or the like so as to be located substantially at the center on the left and right, and near the left on the lower part.
  • the upper muffler support stay 19a fixed to the upper portion of the front cover 33 covers the exhaust pipe support 33b provided on the front cover 33 and the downstream opening 24d of the downstream exhaust pipe 24 and extends diagonally upward and forward , Is attached to the muffler 30.
  • the lower muffler support stay 19 b fixed to the lower portion of the front cover 33 is attached so as to extend forward from the left side surface of the front cover 33.
  • the muffler 30 has a pair of muffler support stays 19 fixed to the internal combustion engine 11 by bolts, and the internal combustion engine 11 and the muffler 30 are connected.
  • the exhaust pipe 21 for exhausting the exhaust gas of the internal combustion engine 11 and the muffler 30 connected to the downstream side of the exhaust pipe 21 are provided.
  • the muffler 30 includes a muffler body 32 and a front opening 32a of the muffler body 32.
  • a downstream side exhaust pipe 24 of the exhaust pipe 21 is disposed inside the muffler 30.
  • the exhaust pipe 21 extends rearward in the muffler 30 from the front of the vehicle to the front of the vehicle. Since the downstream end 24c of the downstream side exhaust pipe 24 is supported by the exhaust pipe support 33b provided on the muffler body 31 which is the outer shell of the internal combustion engine 30, the exhaust pipe length is extended.
  • the front cover 33 is provided with a muffler support stay 19 connecting the internal combustion engine 11 and the muffler 30, and the upper muffler support stay 19a above the muffler support stay 19 covers the exhaust pipe support 33b of the front cover 33. Therefore, even if the downstream end of the exhaust pipe 21 is supported by the front cover 33, the exhaust pipe 21 and the exhaust pipe support 33b of the front cover 33 are covered by the muffler support stay 19 supporting the existing muffler 30.
  • the downstream end 24 c of the exhaust pipe 21 can be supported by the front cover 33 without impairing the appearance, without the exhaust pipe support 33 b being viewed from the outside.
  • the exhaust pipe support portion 33b of the front cover 33 is a convex portion that bulges into the muffler 30, and the downstream end portion 24c of the exhaust pipe 21 is the exhaust pipe support portion 33b and the downstream end portion 24c of the exhaust pipe 21. Since one of them is fitted to and supported by the other, the downstream end 24 c of the exhaust pipe 21 can be effectively supported by the front cover 33 with a simple structure.
  • the muffler 30 is divided into the first expansion chamber 40 and the second expansion chamber 41, and an inner portion 24g of the exhaust pipe 21 arranged in the muffler 30. Because the whole of the air conditioner is disposed in the first expansion chamber 40, the whole exhaust system 20 can be miniaturized.
  • downstream side exhaust pipe 24 of the exhaust pipe 21 is provided with the communication hole 24 e communicating with the inside of the muffler 30, the downstream end 24 c disposed inside the muffler 30 is supported by the front cover 33 and the cap 34 Even if it is closed, the exhaust pipe 21 and the muffler 30 can be communicated. Further, the exhaust gas can be diffused into the muffler 30 by providing a plurality of communication holes 24 e in the downstream side exhaust pipe 24 of the exhaust pipe 21.
  • FIG. 1 A longitudinal sectional view around the exhaust pipe support portion 133b of the exhaust system 120 according to the second embodiment of the present invention is shown in FIG.
  • a convex portion protruding toward the inside is formed in the upper portion of the front surface of the front cover 33, and the downstream end 24c of the downstream side exhaust pipe 24 is formed in the convex portion.
  • the projection 133b is formed to protrude outward from the front cover 33, and the projection 133b serves as the exhaust pipe support 133b.
  • the downstream end 24 c of the exhaust pipe 24 is fitted in the exhaust pipe support 133 b, and the downstream end 24 c is supported by the front cover 33. Furthermore, the downstream end 24 c is closed by a cap 134 as a closing member.
  • FIG. 9 shows a longitudinal cross-sectional view around the exhaust pipe support 233b of the exhaust system 220 according to the third embodiment of the present invention.
  • the downstream end 24 c of the downstream side exhaust pipe 24 is fitted in the exhaust pipe support portion 33 b of the front cover 33, and the downstream end of the exhaust pipe 21 is Although supported by the front cover 33
  • the exhaust pipe support 233b of the front cover 33 is fitted in the downstream end 24c of the downstream side exhaust pipe 24. It is formed to be.
  • the exhaust pipe support 233 b is fitted in the downstream end 24 c of the exhaust pipe 21 and supported by the front cover 33. Furthermore, in the exhaust pipe support 233b.
  • the downstream end 24c is closed by fitting a cap 234 as a closing member.
  • FIG. 10 shows a longitudinal sectional view around the exhaust pipe support 333 b of the exhaust system 320 according to the fourth embodiment of the present invention.
  • the downstream opening 34 d is closed by fitting the cap 34 into the downstream opening 34 d of the downstream side exhaust pipe 24.
  • the front cover 33 is provided with an exhaust pipe support portion 333 b projecting inward from the front cover 33.
  • the exhaust pipe support 333 b has a closed end 334 c of which the end is previously closed.
  • the exhaust pipe support 333 b is fitted in the downstream end 24 c of the exhaust pipe 21, and the downstream end 24 c is fitted to the front cover 33.
  • the downstream opening 34 d is closed by a closing portion 334 integrally provided in the exhaust pipe support 333 b.
  • various design changes are possible as the exhaust pipe support.
  • FIG. 11 Another example of the exhaust system of the straddle-type vehicle is shown in FIGS. 11 and 12.
  • FIG. The exhaust device 50 includes an exhaust pipe 51 and a muffler 52, and the exhaust pipe 51 is disposed in the muffler 52 at the downstream side.
  • a portion of the exhaust pipe 51 disposed in the muffler 52 is constituted of a linear portion 51 a formed in a substantially linear shape and a curved portion 51 b curved in a U-shape.
  • the muffler 52 is provided with a muffler body 53 serving as an outer shell, and the muffler body 53 includes a tubular muffler body 54, and a front cover 55 and a tail cover 56 covering the front and rear openings.
  • a first partition wall 57 and a second partition wall 58 are fixed to the inside of the muffler body 53, and the muffler body 53 has a first expansion chamber 62 and a second expansion chamber from the front by the first partition wall 57 and the second partition wall 58.
  • a chamber 63 and a third expansion chamber 64 are partitioned.
  • An exhaust pipe component 65 is attached to the front surface of the first partition wall 57.
  • the curved portion 51b of the exhaust pipe 51 has a curved portion 57a formed by integrally bending a portion of the first partition 57 rearward, and an exhaust pipe configured as a separate member attached to the front surface of the first partition 57
  • a curved portion 65a of the member 65, and a first cylindrical portion 65b and a second cylindrical portion 65c of the exhaust pipe component 65 are included.
  • the first tubular portion 65 b is connected to the straight portion 51 a of the exhaust pipe 51.
  • the second tubular portion 65 c is the downstream end 51 c of the exhaust pipe 51 and is open to the first expansion chamber 62.
  • the first communication pipe 59 is inserted and fixed to the first partition wall 57, and the first expansion chamber 62 and the second expansion chamber 63 are in communication with each other by the first communication pipe 59.
  • the second communication pipe 60 is inserted into and fixed to the second partition 58, and the second expansion chamber 63 and the third expansion chamber 64 are in communication by the second communication pipe 60.
  • the tail pipe 61 is inserted into and fixed to the tail cover 56, and the third expansion chamber 64 communicates with the outside air.
  • Exhaust gas discharged from the internal combustion engine 11 passes through the exhaust pipe 51 of the exhaust device 50 and flows into the first expansion chamber 62, and from the first expansion chamber 62, the first communication pipe 59, the second expansion chamber 63, the first After passing through the second communication pipe 60 and the third expansion chamber 64, the tail pipe 61 is discharged to the outside air.
  • Curved part 52 Muffler 53: Muffler body 54: Muffler body part, 55 ... Front cover, 56 ... Tail cover, 57 ... 1st partition, 58 ... 2nd Partition wall 62: first expansion chamber 63: second expansion chamber 64: third expansion chamber 65: exhaust pipe component

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

Provided is a saddle-type vehicle exhaust device comprising: an exhaust pipe 21; and a muffler 30 that is connected to the exhaust pipe 21. The muffler 30 includes: a muffler cylinder part 32; and a front cover 33 that closes a front opening 32a of the muffler cylinder part 32. A downstream part 24 of the exhaust pipe 21 is disposed within the muffler 30. In the inside of the muffler 30, the exhaust pipe 21 extends from the front of the vehicle toward the rear thereof and then curves back so as to extend toward the front of the vehicle. A downstream end part 24c of the exhaust pipe 21 is supported by an exhaust pipe support part 33b provided to an outer shell part 31 of the muffler 30. This configuration can be achieved even in cases in which it is necessary to reduce the length of the exhaust pipe, and enables the number of parts to be reduced and the exhaust pipe within the exhaust muffler to be supported with a simpler structure.

Description

鞍乗型車両の排気装置Exhaust system for straddle-type vehicles
　本発明は、排気管がマフラーに接続され、該排気管の下流端がマフラー内に延伸する鞍乗型車両の排気装置に関する。 The present invention relates to an exhaust system for a straddle-type vehicle, wherein an exhaust pipe is connected to a muffler, and a downstream end of the exhaust pipe extends into the muffler.
　従来、鞍乗型車両の排気装置として、特許文献１に開示されるように、マフラー内に延伸して屈曲された排気管が、マフラー内に設けられた保持部材により保持されているものがある。
　しかし、マフラー内に配置された排気配管を、保持部材まで延伸させて保持させる必要があり、設計上の制約から排気管長を短くする必要がある場合に、対応が困難であった。
さらに、排気装置の部品点数を削減するためには、マフラー内で排気管を保持する保持部材を廃止することが望まれる。 Conventionally, as an exhaust system for a saddle-ride type vehicle, as disclosed in Patent Document 1, there is one in which an exhaust pipe which is extended and bent in a muffler is held by a holding member provided in the muffler. .
However, it is difficult to cope with the case where the exhaust pipe disposed in the muffler needs to be extended to the holding member and held, and the exhaust pipe length needs to be shortened due to the design limitation.
Furthermore, in order to reduce the number of parts of the exhaust system, it is desirable to eliminate the holding member for holding the exhaust pipe in the muffler.
日本国特開２０１６－１６０９１４号公報Japanese Patent Application Laid-Open No. 2016-160914
　本発明に係る鞍乗型車両の排気装置は、前記難点を克服するために発明されたもので、その目的は、排気管長を短くする必要がある場合でも対応が可能であり、部品点数を削減し、より簡易な構造で排気マフラー内の排気管を支持することができる鞍乗型車両の排気装置を提供することである。 The exhaust system for a straddle-type vehicle according to the present invention was invented to overcome the above problems, and its object is to cope with the need to shorten the exhaust pipe length and reduce the number of parts. It is an object of the present invention to provide an exhaust system for a straddle-type vehicle which can support the exhaust pipe in the exhaust muffler with a simpler structure.
　本発明は、前記難点を克服するもので、内燃機関の排気を排出する排気管と、該排気管の下流側に接続されるマフラーを備え、前記マフラーの内部に前記排気管の下流部が配置される鞍乗型車両の排気装置において、前記排気管は、前記マフラー内において車両前方から後方に延出した後、車両前方に向かって屈曲して延出され、前記排気管の下流端部は、前記マフラーの外殻部に設けられた排気管支持部で支持されることを特徴とする鞍乗型車両の排気装置を提供する。 The present invention overcomes the above problems, and comprises an exhaust pipe for exhausting the exhaust gas of an internal combustion engine, and a muffler connected to the downstream side of the exhaust pipe, and the downstream portion of the exhaust pipe is disposed inside the muffler In the exhaust system of a straddle-type vehicle, the exhaust pipe extends rearward from the front of the vehicle in the muffler, and then bends and extends toward the front of the vehicle, and the downstream end of the exhaust pipe According to another aspect of the present invention, there is provided an exhaust system of a straddle-type vehicle supported by an exhaust pipe support provided on an outer shell of the muffler.
　本発明は、マフラー内に配置される排気管が延出方向を変え、マフラーの外殻部に設けられた排気管支持部で支持されるので、排気管長を短くする必要がある場合に対応することが可能となり、また既存の部品を用いて排気管を支持しているので、部品点数を削減してより簡易な構造とすることが可能となり、製造コストの低減および排気装置全体の軽量化を図ることができる。 The present invention copes with the case where the exhaust pipe length needs to be shortened because the exhaust pipe disposed in the muffler changes the extending direction and is supported by the exhaust pipe support provided on the outer shell of the muffler. Because the exhaust pipe is supported using existing parts, the number of parts can be reduced to make the structure simpler, reducing the manufacturing cost and reducing the weight of the exhaust system as a whole. Can be
　前記マフラーを、前記マフラー内に隔壁を配置して第１膨張室と第２膨張室に区画し、前記排気管のうち前記マフラー内に配置されるマフラー内部分の全体を、前記第１膨張室内に配置することができる。 In the muffler, a partition is disposed in the muffler to divide the muffler into a first expansion chamber and a second expansion chamber, and the entire muffler inner portion disposed in the muffler of the exhaust pipe is the first expansion chamber. Can be placed.
　前記構成によれば、排気管のうちマフラー内に配設されたマフラー内部分の全体が、第１膨張室内に配置されるように構成することで、マフラー装置全体を小型化することができる。 According to the above configuration, the entire muffler device can be miniaturized by configuring the entire portion of the exhaust pipe in the muffler disposed in the muffler to be disposed in the first expansion chamber.
　前記マフラーの前記外殻部は、マフラー胴部と、該マフラー胴部の前方開口部を閉塞するフロントカバーを備え、前記排気管支持部を前記フロントカバーに設け、前記フロントカバーに前記内燃機関と前記マフラーを連結するステーを設け、前記ステーが前記フロントカバーの前記排気管支持部を覆うようにすることができる。 The outer shell of the muffler includes a muffler body and a front cover for closing a front opening of the muffler body, the exhaust pipe support is provided on the front cover, and the front cover is provided with the internal combustion engine A stay may be provided to connect the muffler, and the stay may cover the exhaust pipe support of the front cover.
　前記構成によれば、前記マフラーの前記外殻部のフロントカバーに排気管を支持させても、既存部品であるマフラーを支持するステーで、排気管とフロントカバーの排気管支持部を覆うことにより、排気管支持部が外部から視認されずに、外観性を損なうことなく、排気管をフロントカバーに支持させることが可能となる。 According to the above configuration, even if the exhaust pipe is supported by the front cover of the outer shell portion of the muffler, the exhaust pipe and the exhaust pipe supporting portion of the front cover are covered by the stay that supports the existing component muffler. Therefore, the exhaust pipe can be supported by the front cover without impairing the appearance without the exhaust pipe support being visually recognized from the outside.
　前記フロントカバーの前記排気管支持部を、前記マフラーの一部が突出した凸部とし、前記排気管の下流端部は、前記凸部と前記排気管の下流端部とのいずれか一方が他方に嵌合して支持されるようにすることができる。 The exhaust pipe support portion of the front cover is a convex portion from which a part of the muffler protrudes, and the downstream end of the exhaust pipe is one of the convex portion and the downstream end of the exhaust pipe being the other Can be fitted and supported.
　前記構成によれば、排気管の下流端部を、簡易な構造でもって効果的にフロントカバーで支持することができる。 According to the above configuration, the downstream end of the exhaust pipe can be effectively supported by the front cover with a simple structure.
　前記排気管の下流端部の下流開口部を、閉塞部により閉塞し、前記排気管の前記下流部に、前記マフラー内と連通する連通孔を設けてもよい。 The downstream opening of the downstream end of the exhaust pipe may be closed by a closing portion, and a communication hole communicating with the inside of the muffler may be provided in the downstream part of the exhaust pipe.
　前記構成によれば、排気管の下流部にマフラー内と連通する連通孔を設けることで、マフラー内に配置される下流端部がフロントカバーに支持されて閉塞されても、排気管とマフラーを連通することができる。また、排気管の下流部に連通孔が複数設けられることで、排気をマフラー内に拡散させることができる。 According to the above configuration, by providing the communication hole communicating with the inside of the muffler at the downstream portion of the exhaust pipe, the exhaust pipe and the muffler can be closed even if the downstream end disposed inside the muffler is supported by the front cover and closed. It can communicate. In addition, the exhaust gas can be diffused into the muffler by providing a plurality of communication holes in the downstream portion of the exhaust pipe.
　本発明に係る鞍乗型車両の排気装置は、排気管長を短くする必要がある場合に対応することが可能となり、また既存の部品を用いて排気管を支持しているので、部品点数を削減してより簡易な構造とすることが可能となり、製造コストの低減および排気装置全体の軽量化を図ることができる。 The exhaust system of the saddle-ride type vehicle according to the present invention can cope with the case where the exhaust pipe length needs to be shortened, and since the exhaust pipe is supported using the existing parts, the number of parts can be reduced. Thus, the structure can be simplified and the manufacturing cost can be reduced and the weight of the entire exhaust system can be reduced.
本発明の第１の実施の形態の鞍乗型車両の排気装置が搭載された自動二輪車の右側面図である。FIG. 1 is a right side view of a motorcycle equipped with an exhaust system of a straddle-type vehicle according to a first embodiment of the present invention. 自動二輪車に搭載された状態の排気装置を右斜め上方から視た斜視図である。FIG. 2 is a perspective view of an exhaust device mounted on a motorcycle, viewed obliquely from above to the right. 自動二輪車に搭載された状態の排気装置を垂直に切断した図である。FIG. 2 is a view vertically cutting an exhaust device mounted on a motorcycle. 排気装置の横断面図である。It is a cross-sectional view of an exhaust device. 排気装置の縦断面図である。It is a longitudinal cross-sectional view of an exhaust system. 図５のVI-VI矢視図である。It is a VI-VI arrow line view of FIG. 図５のVII-VII矢視断面図である。FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 5; 本発明の第２の実施の形態の鞍乗型車両の排気装置における排気支持部周辺の縦断面図である。It is a longitudinal cross-sectional view of the exhaust_gas | exhaustion support periphery of the exhaust system of the straddle-type vehicle of the 2nd Embodiment of this invention. 本発明の第３の実施の形態の鞍乗型車両の排気装置における排気支持部周辺の縦断面図である。It is a longitudinal cross-sectional view of the exhaust_gas | exhaustion support part periphery in the exhaust device of the saddle-ride type vehicle of the 3rd Embodiment of this invention. 本発明の第４の実施の形態の鞍乗型車両の排気装置がにおける排気支持部周辺の縦断面図である。It is a longitudinal cross-sectional view of the exhaust_gas | exhaustion support periphery in the exhaust device of the saddle-ride type vehicle of the 4th Embodiment of this invention. 他の鞍乗型車両の排気装置の一部を切断した斜視図である。It is the perspective view which cut a part of exhaust system of other straddle type vehicles. 図１１の排気装置の横断面図である。It is a cross-sectional view of the exhaust system of FIG.
　以下、本発明に係る鞍乗型車両の排気装置の第１の実施の形態について、図１ないし図７を参照しながら説明する。 Hereinafter, a first embodiment of an exhaust system for a straddle-type vehicle according to the present invention will be described with reference to FIGS. 1 to 7.
　図１は、本発明の第１の実施の形態の鞍乗型車両の排気装置20が搭載された鞍乗型車両の一例としての自動二輪車１の右側面図である。この自動二輪車１は、車両の前後方向を指向したフレーム２を備えており、フレーム２は前端に設けられるヘッドパイプ３に固定され、ヘッドパイプ３から斜め下後方に延びるダウンフレーム部材２ａと、ダウンフレーム部材２ａの下端から後方へ水平に延びる左右一対のロアフレーム部材２ｂと、ロアフレーム部材２ｂの後端から斜め後ろ上方に延びる左右一対のシートフレーム部材２ｃを有している。ヘッドパイプ３は前輪５を支持するフロントフォーク４を走行可能に支承している。 FIG. 1 is a right side view of a motorcycle 1 as an example of a straddle-type vehicle equipped with an exhaust system 20 of a straddle-type vehicle according to a first embodiment of the present invention. The motorcycle 1 includes a frame 2 oriented in the front-rear direction of the vehicle, the frame 2 being fixed to a head pipe 3 provided at the front end, and extending downward from the head pipe 3 to a down frame member 2a A pair of left and right lower frame members 2b horizontally extending from the lower end of the frame member 2a to the rear and a pair of left and right seat frame members 2c extending diagonally upward from the rear end of the lower frame member 2b. The head pipe 3 movably supports a front fork 4 supporting the front wheel 5.
　自動二輪車１のパワーユニット10は、内燃機関11と動力伝達装置12との一体型であって、フレーム２に対して揺動可能なユニットスイング式のパワーユニット10である。内燃機関11は、強制空冷式１気筒内燃機関であって、車両の左右方向の中央に位置している。動力伝達装置12は、図示されないＶベルト式無断変速機と変速ギヤ装置とからなり、内燃機関11の左側に接続され、自動二輪車１の左側後方に配設されている。自動二輪車１の後輪６は、動力伝達装置12の最後部の回転軸７に連結されている。 The power unit 10 of the motorcycle 1 is an integral type of the internal combustion engine 11 and the power transmission device 12, and is a unit swing type power unit 10 that can swing with respect to the frame 2. The internal combustion engine 11 is a forced air-cooling single cylinder internal combustion engine, and is located at the center in the left-right direction of the vehicle. The power transmission device 12 includes a V-belt type all-purpose transmission and a transmission gear device (not shown), is connected to the left side of the internal combustion engine 11, and is disposed at the left rear of the motorcycle 1. The rear wheel 6 of the motorcycle 1 is connected to a rotary shaft 7 at the rear end of the power transmission device 12.
　内燃機関11の気筒部（不図示）には、燃料噴射弁（不図示）を備えた図示されない吸気マニホールド、スロットルボディ、コネクティングチューブ、エアクリーナが順次連結されている。エアクリーナから吸入された外気は、燃料噴射弁から噴霧される燃料と混合されて混合気となり、内燃機関11の気筒部へと送られて燃焼される。 An intake manifold (not shown) having a fuel injection valve (not shown), a throttle body, a connecting tube, and an air cleaner are sequentially connected to a cylinder portion (not shown) of the internal combustion engine 11. The outside air drawn in from the air cleaner is mixed with the fuel sprayed from the fuel injection valve to form an air-fuel mixture, and is sent to the cylinder portion of the internal combustion engine 11 for combustion.
　内燃機関11の排気ガス排出側には、排気装置20が接続されている。排気装置20は、内燃機関11の図示されない排気ポートに接続され下方の前方から後方へ屈曲して延出した後、車両前方に向かって屈曲して延出され内燃機関の排気を排出する排気管21と、該排気管21の途中に配設される排気ガスの触媒装置25と、排気管21の下流側に接続されるマフラー30を備えている。 An exhaust device 20 is connected to the exhaust gas discharge side of the internal combustion engine 11. The exhaust system 20 is connected to an exhaust port (not shown) of the internal combustion engine 11 and is bent and extended from the lower front to the rear, and then bent and extended toward the front of the vehicle to exhaust the exhaust gas of the internal combustion engine 21, an exhaust gas catalyst device 25 disposed in the middle of the exhaust pipe 21, and a muffler 30 connected to the downstream side of the exhaust pipe 21.
　排気管21は、図１に示されるように、内燃機関11の排気ポート(不図示)に接続される上流側排気管22、中間排気管23および下流側排気管24から構成されている。上流側排気管22と中間排気管23の間には触媒装置25が設けられている。上流側排気管22は、内燃機関11の下面側から下方から左方にむかってさらに右方に湾曲して形成され、下流端部は触媒装置25の左側に接続されている。触媒装置25は長手方向が車幅方向に向かうように配置され、触媒装置の右端は中間排気管23の上流端23ａが接続されている。中間排気管23は車両後方に向かって延びている。中間排気管23の下流端部23ｂは、図２に示されるように、マフラー30に支持された下流側排気管24の上流端部と24ａと接続されている。図３に示されるように、下流側排気管24は湾曲部24ｂを備え、略Ｕ字型に形成されている。下流側排気管24の下流端部24ｃは、後述するフロントカバー33に設けられた排気管支持部33ｂで支持される。下流側排気管24の下流端部24ｃには、排気管21と後述するマフラー30内を連通する複数の連通孔24ｅが形成されている。 As shown in FIG. 1, the exhaust pipe 21 includes an upstream exhaust pipe 22 connected to an exhaust port (not shown) of the internal combustion engine 11, an intermediate exhaust pipe 23, and a downstream exhaust pipe 24. A catalytic device 25 is provided between the upstream exhaust pipe 22 and the intermediate exhaust pipe 23. The upstream side exhaust pipe 22 is further curved rightward from the lower side to the left side of the internal combustion engine 11, and the downstream end is connected to the left side of the catalyst device 25. The catalyst device 25 is disposed such that the longitudinal direction is in the vehicle width direction, and the right end of the catalyst device is connected to the upstream end 23 a of the intermediate exhaust pipe 23. The intermediate exhaust pipe 23 extends rearward of the vehicle. The downstream end 23 b of the intermediate exhaust pipe 23 is connected to the upstream end of the downstream exhaust pipe 24 supported by the muffler 30 and 24 a as shown in FIG. 2. As shown in FIG. 3, the downstream exhaust pipe 24 includes a curved portion 24 b and is formed in a substantially U-shape. The downstream end 24 c of the downstream side exhaust pipe 24 is supported by an exhaust pipe support 33 b provided on a front cover 33 described later. The downstream end 24c of the downstream side exhaust pipe 24 is formed with a plurality of communication holes 24e that communicate the exhaust pipe 21 with the interior of a muffler 30 described later.
　マフラー30は、マフラー支持ステー19を介して、自動二輪車１の右側方に位置して斜め後ろ上がりになるように、パワーユニット10の後部に取り付けられている。内燃機関11から排出される排気ガスは、排気管21および触媒装置25を通過して、マフラー30に送られて外気に排出される。 The muffler 30 is attached to the rear of the power unit 10 through the muffler support stay 19 so as to be located on the right side of the motorcycle 1 and obliquely upward. Exhaust gas exhausted from the internal combustion engine 11 passes through the exhaust pipe 21 and the catalyst device 25 and is sent to the muffler 30 to be exhausted to the outside air.
　排気装置20は、図４においてその横断面が示されている。この横断面図は、排気装置20のマフラー30の外殻部であるマフラーボディ31を横断面として表しており、内部を平面視で表し、フロントカバー33の前方の一部を平面視で表している。図５は排気装置20の縦断面図であり、図４と同様に外殻となるマフラーボディ31を断面として表しており、内部は切断せずに表している。 The exhaust system 20 is shown in cross-section in FIG. This cross-sectional view shows the muffler body 31 which is the outer shell of the muffler 30 of the exhaust system 20 as a cross-section, the inside is shown in a plan view, and a part of the front of the front cover 33 is shown in a plan view. There is. FIG. 5 is a longitudinal cross-sectional view of the exhaust system 20, and similarly to FIG. 4, shows the muffler body 31 serving as the outer shell as a cross section, and the inside is shown without being cut.
　排気装置20のマフラー30は、図３ないし図５に示されるように、その外殻となるマフラーボディ31と、マフラーボディ31内部を第１膨張室40と第２膨張室41に仕切る隔壁36と、第１膨張室40と第２膨張室41とを連通する連通管37およびマフラー30から排気ガスを外気に排出するテールパイプ38を備えている。排気管21の下流側排気管24は、上流端部24ａを除いた略全てが、マフラーボディ31の内部に配設されている。 As shown in FIGS. 3 to 5, the muffler 30 of the exhaust system 20 has a muffler body 31 as its outer shell, and a partition 36 that divides the inside of the muffler body 31 into a first expansion chamber 40 and a second expansion chamber 41. A communication pipe 37 for communicating the first expansion chamber 40 with the second expansion chamber 41 and a tail pipe 38 for discharging exhaust gas from the muffler 30 to the outside air are provided. Almost all of the downstream side exhaust pipe 24 of the exhaust pipe 21 except the upstream end 24 a are disposed inside the muffler body 31.
　マフラーボディ31は、断面形状が楕円形状の縦長の筒状のマフラー胴部32を備え、該マフラー胴部32の前方開口部32ａと、後方開口部32ｂのそれぞれを閉塞するように、フロントカバー33およびテールカバー35が溶接にて固着されている。 The muffler body 31 includes a longitudinally elongated cylindrical muffler body 32 having an elliptical cross-sectional shape, and the front cover 33 is configured to close the front opening 32 a and the rear opening 32 b of the muffler body 32. And the tail cover 35 is fixed by welding.
　フロントカバー33の前面の下部には、図５および図６に示されるように、下流側排気管24の上流端部24ａが挿通される排気管挿通部33ａが形成されている。排気管挿通部33ａは、外部に向かって突出して形成されており、下流側排気管24の上流端部24ａが挿通されてフロントカバー33に溶接にて固着されている。 At the lower portion of the front surface of the front cover 33, as shown in FIG. 5 and FIG. 6, an exhaust pipe insertion portion 33a into which the upstream end portion 24a of the downstream side exhaust pipe 24 is inserted is formed. The exhaust pipe insertion portion 33 a is formed so as to protrude outward, and the upstream end portion 24 a of the downstream side exhaust pipe 24 is inserted and fixed to the front cover 33 by welding.
　フロントカバー33の前面の上部には、その一部が内部に向かって突出した円筒状の凸部33ｂが形成され、該凸部33ｂが、下流側排気管24の下流端部24ｃが嵌合される排気管支持部33ｂとなっている。該排気管支持部33ｂの内径と、下流側排気管24の下流端部24ｃの外径は略同じ大きさに設定され、排気管支持部33ｂに下流端部24ｃが嵌合される。下流側排気管24の下流開口部24ｄ内にはキャップ34が嵌合され、キャップ34は、下流端部24ｃとともにフロントカバー33の排気管支持部33ｂに溶接により固定され、下流側排気管24の下流開口部24ｄが閉塞されるとともに、下流側排気管24の下流端部24ｃはフロントカバー33に支持される。 A cylindrical convex portion 33b is formed at an upper portion of the front surface of the front cover 33. A portion of the cylindrical convex portion 33b protrudes toward the inside, and the convex portion 33b is engaged with the downstream end 24c of the downstream side exhaust pipe 24. And an exhaust pipe support 33b. The inner diameter of the exhaust pipe support 33b and the outer diameter of the downstream end 24c of the downstream exhaust pipe 24 are set to substantially the same size, and the downstream end 24c is fitted to the exhaust pipe support 33b. A cap 34 is fitted in the downstream opening 24 d of the downstream exhaust pipe 24, and the cap 34 is fixed to the exhaust pipe support 33 b of the front cover 33 by welding together with the downstream end 24 c. The downstream opening 24 d is closed, and the downstream end 24 c of the downstream exhaust pipe 24 is supported by the front cover 33.
　本実施の形態では、フロントカバー33に内側に向かって突出した凸部33ｂを形成し、該凸部33ｂに下流側排気管24の下流端部24ｃを嵌合して支持させているが、フロントカバー33に凸部33ｂとしての排気管支持部33ｂを形成せず、下流側排気管24の下流端部24ｃをフロントカバー33の内壁に突き当てて当接し、下流側排気管24の下流端部24ｃとフロントカバー33の内壁とを溶接することで、下流端部24ｃをフロントカバー33に支持させてもよい。 In the present embodiment, the front cover 33 is formed with the convex portion 33b that protrudes inward, and the downstream end portion 24c of the downstream side exhaust pipe 24 is fitted and supported by the convex portion 33b. The exhaust pipe supporting portion 33b as the convex portion 33b is not formed on the cover 33, but the downstream end 24c of the downstream side exhaust pipe 24 abuts against the inner wall of the front cover 33 and abuts, and the downstream end of the downstream side exhaust pipe 24 The downstream end 24 c may be supported by the front cover 33 by welding the 24 c to the inner wall of the front cover 33.
　マフラーボディ31の内部は、隔壁36により仕切られている。隔壁36は、図５および図７に示されるように、マフラーボディ31の断面形状と略同形に形成された壁部36ａを備え、壁部36ａの周縁には、壁部36ａに対して直角に所定幅の取付縁部36ｂが設けられ、取付縁部36ｂがマフラーボディ31の内壁に固着されて、マフラーボディ31の内部は隔壁36により、長手方向後方に向かって、第１膨張室40、第２膨張室41の２室に区画される。壁部36ａの上部左寄りには、前方に筒状に突出した連通管挿通部36ｃが設けられている。マフラーボディ31の内部の第１膨張室40と第２膨張室41とは、隔壁36の連通管挿通部36ｃを挿通して隔壁に溶接された連通管37により連通されている。 The interior of the muffler body 31 is partitioned by a partition wall 36. As shown in FIGS. 5 and 7, the partition wall 36 includes a wall portion 36a formed in substantially the same shape as the cross-sectional shape of the muffler body 31, and the periphery of the wall portion 36a is perpendicular to the wall portion 36a. A mounting edge portion 36b having a predetermined width is provided, the mounting edge portion 36b is fixed to the inner wall of the muffler body 31, and the interior of the muffler body 31 is longitudinally separated rearward by the partition wall 36, the first expansion chamber 40, the first The expansion chamber 41 is divided into two chambers. A communication pipe insertion portion 36c which is cylindrically protruded forward is provided on the upper left side of the wall portion 36a. The first expansion chamber 40 and the second expansion chamber 41 inside the muffler body 31 are communicated with each other by the communication pipe 37 which is inserted into the communication pipe insertion portion 36 c of the partition 36 and welded to the partition.
　テールカバー35の下方には、後方に筒状に突出したテールパイプ挿通部35ａが設けられており、該テールパイプ挿通部35ａにテールパイプ38が挿通されて溶接されている。第２膨張室41は、テールパイプ38により外気に連通され、内燃機関11から排出された排気ガスは車両後方に排出される。 Below the tail cover 35, a tail pipe insertion portion 35a which protrudes in a cylindrical shape is provided rearward, and the tail pipe 38 is inserted into and welded to the tail pipe insertion portion 35a. The second expansion chamber 41 is communicated with the outside air by the tail pipe 38, and the exhaust gas discharged from the internal combustion engine 11 is discharged to the rear of the vehicle.
　マフラー30の内部には、排気管21の下流部の下流側排気管24が配置されており、下流側排気管24の上流側の一部は、フロントカバー33の排気管挿通部33ａからマフラー30の外に出ているマフラー外部分24ｆとなっており、その他の部分はマフラー30内に配置されたマフラー内部分24ｇとなっている。該マフラー内部分24ｇは、その全体が第１膨張室40内に配置されている。 The downstream side exhaust pipe 24 of the downstream part of the exhaust pipe 21 is disposed inside the muffler 30, and a part of the upstream side of the downstream side exhaust pipe 24 extends from the exhaust pipe insertion portion 33 a of the front cover 33 to the muffler 30. The other portion is an inner portion 24g of the muffler disposed inside the muffler 30. The entire muffler inner portion 24 g is disposed in the first expansion chamber 40.
　マフラー30の前部のフロントカバー33には、図２に示されるように、上部の左右略中央および、下部の左側寄りに位置して、一対のマフラー支持ステー19が溶接等により取り付けられている。フロントカバー33の上部に固着された上部マフラー支持ステー19ａは、フロントカバー33に設けられた排気管支持部33ｂおよび下流側排気管24の下流開口部24ｄを覆って、斜め上前方に延伸するように、マフラー30に取り付けられている。フロントカバー33の下部に固着された下部マフラー支持ステー19ｂは、フロントカバー33の左側面から前方に延伸するように取り付けられている。 As shown in FIG. 2, a pair of muffler support stays 19 are attached to the front cover 33 at the front of the muffler 30 by welding or the like so as to be located substantially at the center on the left and right, and near the left on the lower part. . The upper muffler support stay 19a fixed to the upper portion of the front cover 33 covers the exhaust pipe support 33b provided on the front cover 33 and the downstream opening 24d of the downstream exhaust pipe 24 and extends diagonally upward and forward , Is attached to the muffler 30. The lower muffler support stay 19 b fixed to the lower portion of the front cover 33 is attached so as to extend forward from the left side surface of the front cover 33.
　マフラー30は、一対のマフラー支持ステー19がボルトにより内燃機関11に固定され、内燃機関11とマフラー30は連結される。 The muffler 30 has a pair of muffler support stays 19 fixed to the internal combustion engine 11 by bolts, and the internal combustion engine 11 and the muffler 30 are connected.
　本発明の一の実施形態は前記したように構成されているので、以下のような効果を奏することができる。 Since one embodiment of the present invention is constituted as mentioned above, the following effects can be produced.
　内燃機関11の排気を排出する排気管21と、該排気管21の下流側に接続されるマフラー30を備え、マフラー30は、マフラー胴部32と、該マフラー胴部32の前方開口部32aを閉塞するフロントカバー33を備え、マフラー30の内部に前記排気管21の下流側排気管24が配置され、排気管21は、マフラー30内において車両前方から後方に延出した後、車両前方に向かって屈曲して延出され、下流側排気管24の下流端部24ｃは、内燃機関30の外殻部であるマフラーボディ31に設けられた排気管支持部33bで支持されているので、排気管長を短くする必要がある場合に対応することが可能となり、また既存の部品を用いて排気管を支持しているので、部品点数を削減してより簡易な構造とすることが可能となり、製造コストの低減および排気装置全体の軽量化を図ることができる。 The exhaust pipe 21 for exhausting the exhaust gas of the internal combustion engine 11 and the muffler 30 connected to the downstream side of the exhaust pipe 21 are provided. The muffler 30 includes a muffler body 32 and a front opening 32a of the muffler body 32. A downstream side exhaust pipe 24 of the exhaust pipe 21 is disposed inside the muffler 30. The exhaust pipe 21 extends rearward in the muffler 30 from the front of the vehicle to the front of the vehicle. Since the downstream end 24c of the downstream side exhaust pipe 24 is supported by the exhaust pipe support 33b provided on the muffler body 31 which is the outer shell of the internal combustion engine 30, the exhaust pipe length is extended. It is possible to cope with cases where it is necessary to shorten the length, and since the exhaust pipe is supported using existing parts, it is possible to reduce the number of parts and make the structure simpler, and thus the manufacturing cost And reduce the weight of the exhaust system as a whole. it can.
　また、フロントカバー33に、内燃機関11とマフラー30を連結するマフラー支持ステー19を設け、マフラー支持ステー19の上方の上部マフラー支持ステー19ａが、フロントカバー33の排気管支持部33ｂを覆っているので、フロントカバー33に排気管21の下流端を支持させても、既存部品であるマフラー30を支持するマフラー支持ステー19で、排気管21とフロントカバー33の排気管支持部33ｂを覆うことにより、排気管支持部33ｂが外部から視認されずに、外観性を損なうことなく、排気管21の下流端部24ｃをフロントカバー33に支持させることが可能となる。 Further, the front cover 33 is provided with a muffler support stay 19 connecting the internal combustion engine 11 and the muffler 30, and the upper muffler support stay 19a above the muffler support stay 19 covers the exhaust pipe support 33b of the front cover 33. Therefore, even if the downstream end of the exhaust pipe 21 is supported by the front cover 33, the exhaust pipe 21 and the exhaust pipe support 33b of the front cover 33 are covered by the muffler support stay 19 supporting the existing muffler 30. The downstream end 24 c of the exhaust pipe 21 can be supported by the front cover 33 without impairing the appearance, without the exhaust pipe support 33 b being viewed from the outside.
　さらに、フロントカバー33の排気管支持部33ｂを、マフラー30内に膨出する凸部とし、排気管21の下流端部24ｃは、前記排気管支持部33ｂと排気管21の下流端部24ｃとのいずれか一方が他方に嵌合して支持されるようになっているので、排気管21の下流端部24ｃを、簡易な構造で効果的にフロントカバー33でもって支持することができる。 Furthermore, the exhaust pipe support portion 33b of the front cover 33 is a convex portion that bulges into the muffler 30, and the downstream end portion 24c of the exhaust pipe 21 is the exhaust pipe support portion 33b and the downstream end portion 24c of the exhaust pipe 21. Since one of them is fitted to and supported by the other, the downstream end 24 c of the exhaust pipe 21 can be effectively supported by the front cover 33 with a simple structure.
　さらにまた、マフラー30を、マフラー30内に隔壁36を配置することにより、第１膨張室40と第２膨張室41に区画し、排気管21のうちマフラー30内に配置されるマフラー内部分24ｇの全体を、第１膨張室40内に配置しているので、排気装置20の全体を小型化することができる。 Furthermore, by arranging the partition wall 36 in the muffler 30, the muffler 30 is divided into the first expansion chamber 40 and the second expansion chamber 41, and an inner portion 24g of the exhaust pipe 21 arranged in the muffler 30. Because the whole of the air conditioner is disposed in the first expansion chamber 40, the whole exhaust system 20 can be miniaturized.
　また、排気管21の下流側排気管24に、マフラー30内と連通する連通孔24ｅを設けているので、マフラー30内に配置される下流端部24ｃがフロントカバー33に支持されてキャップ34により閉塞されても、排気管21とマフラー30を連通することができる。また、排気管21の下流側排気管24に連通孔24ｅが複数設けられることで、排気をマフラー30内に拡散させることができる。 Further, since the downstream side exhaust pipe 24 of the exhaust pipe 21 is provided with the communication hole 24 e communicating with the inside of the muffler 30, the downstream end 24 c disposed inside the muffler 30 is supported by the front cover 33 and the cap 34 Even if it is closed, the exhaust pipe 21 and the muffler 30 can be communicated. Further, the exhaust gas can be diffused into the muffler 30 by providing a plurality of communication holes 24 e in the downstream side exhaust pipe 24 of the exhaust pipe 21.
　本発明の第２の実施の形態の排気装置120の排気管支持部133ｂ周辺の縦断面図を、図８に示す。本発明の第１の実施の形態の排気装置20では、フロントカバー33の前面の上部に、内部に向かって突出した凸部を形成し、該凸部に下流側排気管24の下流端部24ｃを嵌合しているが、第２の実施の形態の排気装置120では、フロントカバー33から外方に突出する凸部133ｂを形成し、該凸部133ｂを排気管支持部133ｂとして、下流側排気管24の下流端部24ｃを排気管支持部133ｂ内に嵌合し、下流端部24ｃをフロントカバー33に支持している。さらに、下流端部24ｃは閉塞部材としてのキャップ134で閉塞されている。 A longitudinal sectional view around the exhaust pipe support portion 133b of the exhaust system 120 according to the second embodiment of the present invention is shown in FIG. In the exhaust device 20 according to the first embodiment of the present invention, a convex portion protruding toward the inside is formed in the upper portion of the front surface of the front cover 33, and the downstream end 24c of the downstream side exhaust pipe 24 is formed in the convex portion. In the exhaust system 120 of the second embodiment, the projection 133b is formed to protrude outward from the front cover 33, and the projection 133b serves as the exhaust pipe support 133b. The downstream end 24 c of the exhaust pipe 24 is fitted in the exhaust pipe support 133 b, and the downstream end 24 c is supported by the front cover 33. Furthermore, the downstream end 24 c is closed by a cap 134 as a closing member.
　また、本発明の第３の実施の形態の排気装置220の排気管支持部233ｂ周辺の縦断面図を、図９に示す。本発明の第１の実施の形態の排気装置20では、フロントカバー33の排気管支持部33ｂ内に、下流側排気管24の下流端部24ｃが嵌合されて、排気管21の下流端がフロントカバー33に支持されているが、本発明の第３の実施の形態の排気装置220では、フロントカバー33の排気管支持部233ｂは、下流側排気管24の下流端部24ｃ内に嵌合されるように形成されている。該排気管支持部233ｂは、排気管21の下流端部24ｃ内に嵌合されて、フロントカバー33に支持される。さらに、排気管支持部233ｂ内に。閉塞部材としてのキャップ234が嵌合されて、下流端部24ｃは閉塞されている。 Further, FIG. 9 shows a longitudinal cross-sectional view around the exhaust pipe support 233b of the exhaust system 220 according to the third embodiment of the present invention. In the exhaust system 20 according to the first embodiment of the present invention, the downstream end 24 c of the downstream side exhaust pipe 24 is fitted in the exhaust pipe support portion 33 b of the front cover 33, and the downstream end of the exhaust pipe 21 is Although supported by the front cover 33, in the exhaust system 220 according to the third embodiment of the present invention, the exhaust pipe support 233b of the front cover 33 is fitted in the downstream end 24c of the downstream side exhaust pipe 24. It is formed to be. The exhaust pipe support 233 b is fitted in the downstream end 24 c of the exhaust pipe 21 and supported by the front cover 33. Furthermore, in the exhaust pipe support 233b. The downstream end 24c is closed by fitting a cap 234 as a closing member.
　さらに、本発明の第４の実施の形態の排気装置320の排気管支持部333ｂ周辺の縦断面図を、図１０に示す。本発明の第１の実施の形態の排気装置20では、下流側排気管24の下流開口部34ｄ内にキャップ34を嵌合することによって、下流開口部34ｄを閉塞しているが、本発明の第４の実施の形態の排気装置320では、フロントカバー33に、フロントカバー33から内方に突出する排気管支持部333ｂを設けられている。該排気管支持部333ｂは、先端が予め閉塞された閉塞部334を有する、排気管21の下流端部24ｃ内に該排気管支持部333ｂを嵌合し、下流端部24ｃをフロントカバー33に支持させるとともに、下流開口部34ｄは、排気管支持部333ｂに一体に設けられた閉塞部334により閉塞される。前記したように、排気管支持部として種々の設計変更が可能である。 Furthermore, FIG. 10 shows a longitudinal sectional view around the exhaust pipe support 333 b of the exhaust system 320 according to the fourth embodiment of the present invention. In the exhaust system 20 according to the first embodiment of the present invention, the downstream opening 34 d is closed by fitting the cap 34 into the downstream opening 34 d of the downstream side exhaust pipe 24. In the exhaust system 320 of the fourth embodiment, the front cover 33 is provided with an exhaust pipe support portion 333 b projecting inward from the front cover 33. The exhaust pipe support 333 b has a closed end 334 c of which the end is previously closed. The exhaust pipe support 333 b is fitted in the downstream end 24 c of the exhaust pipe 21, and the downstream end 24 c is fitted to the front cover 33. While being supported, the downstream opening 34 d is closed by a closing portion 334 integrally provided in the exhaust pipe support 333 b. As described above, various design changes are possible as the exhaust pipe support.
　鞍乗型車両の排気装置の他の一例を、図１１および図１２に示す。排気装置50は、排気管51とマフラー52とからなり、排気管51は、その下流側はマフラー52内に配置されている。排気管51のうちマフラー52内に配置されている部分は、略直線状に形成された直線部51ａと、Ｕ字状に湾曲された湾曲部51ｂから構成されている。 Another example of the exhaust system of the straddle-type vehicle is shown in FIGS. 11 and 12. FIG. The exhaust device 50 includes an exhaust pipe 51 and a muffler 52, and the exhaust pipe 51 is disposed in the muffler 52 at the downstream side. A portion of the exhaust pipe 51 disposed in the muffler 52 is constituted of a linear portion 51 a formed in a substantially linear shape and a curved portion 51 b curved in a U-shape.
　マフラー52は、外殻となるマフラーボディ53を備え、マフラーボディ53は、筒状のマフラー胴部54と、その前後開口部を覆うフロントカバー55およびテールカバー56からなる。マフラーボディ53の内部には、第１隔壁57および第２隔壁58が固着されており、マフラーボディ53は、第１隔壁57および第２隔壁58により、前方から第１膨張室62、第２膨張室63、第３膨張室64に区画されている。 The muffler 52 is provided with a muffler body 53 serving as an outer shell, and the muffler body 53 includes a tubular muffler body 54, and a front cover 55 and a tail cover 56 covering the front and rear openings. A first partition wall 57 and a second partition wall 58 are fixed to the inside of the muffler body 53, and the muffler body 53 has a first expansion chamber 62 and a second expansion chamber from the front by the first partition wall 57 and the second partition wall 58. A chamber 63 and a third expansion chamber 64 are partitioned.
　第１隔壁57の前面には、排気管構成部材65が取り付けられている。排気管51の湾曲部51ｂは、第１隔壁57の一部が一体的に後方に湾曲されて形成された湾曲部57ａと、第１隔壁57の前面に取り付けられた別部材としての排気管構成部材65の湾曲部65ａと、排気管構成部材65の第１筒状部65ｂおよび第２筒状部65ｃにより構成されている。第１筒状部65ｂは排気管51の直線部51ａに接続されている。第２筒状部65ｃは、排気管51の下流側端部51ｃとなっており、第１膨張室62に開口している。第１隔壁57および排気管構成部材65により、排気管51の湾曲部51ｂを構成することにより、排気管51の内を流れる排気ガスの流れを、車両後方から車両前方に向けて変更することができ、部品点数を削減することができる。 An exhaust pipe component 65 is attached to the front surface of the first partition wall 57. The curved portion 51b of the exhaust pipe 51 has a curved portion 57a formed by integrally bending a portion of the first partition 57 rearward, and an exhaust pipe configured as a separate member attached to the front surface of the first partition 57 A curved portion 65a of the member 65, and a first cylindrical portion 65b and a second cylindrical portion 65c of the exhaust pipe component 65 are included. The first tubular portion 65 b is connected to the straight portion 51 a of the exhaust pipe 51. The second tubular portion 65 c is the downstream end 51 c of the exhaust pipe 51 and is open to the first expansion chamber 62. By configuring the curved portion 51b of the exhaust pipe 51 with the first partition wall 57 and the exhaust pipe component 65, the flow of exhaust gas flowing in the exhaust pipe 51 can be changed from the vehicle rear to the vehicle front The number of parts can be reduced.
　第１隔壁57には、第１連通管59が挿通されて固定されており、第１膨張室62と、第２膨張室63は、第１連通管59により連通されている。第２隔壁58には、第２連通管60が挿通されて固定されており、第２膨張室63と、第３膨張室64は、第２連通管60により連通されている。テールカバー56には、テールパイプ61が挿通されて固定され、第３膨張室64は外気と連通している。 The first communication pipe 59 is inserted and fixed to the first partition wall 57, and the first expansion chamber 62 and the second expansion chamber 63 are in communication with each other by the first communication pipe 59. The second communication pipe 60 is inserted into and fixed to the second partition 58, and the second expansion chamber 63 and the third expansion chamber 64 are in communication by the second communication pipe 60. The tail pipe 61 is inserted into and fixed to the tail cover 56, and the third expansion chamber 64 communicates with the outside air.
　内燃機関11から排出される排気ガスは、排気装置50の排気管51を通り、第１膨張室62に流入し、第１膨張室62から、第１連通管59、第２膨張室63、第２連通管60、第３膨張室64を通過し、テールパイプ61から外気に排出される。 Exhaust gas discharged from the internal combustion engine 11 passes through the exhaust pipe 51 of the exhaust device 50 and flows into the first expansion chamber 62, and from the first expansion chamber 62, the first communication pipe 59, the second expansion chamber 63, the first After passing through the second communication pipe 60 and the third expansion chamber 64, the tail pipe 61 is discharged to the outside air.
　以上、本発明の実施の形態について詳細に説明したが、本発明は前記した実施の形態に限定されるものではなく、その他種々の変更が可能である。また、本発明の内燃機関は、自動二輪車に限定されず他種の鞍乗型車両にも幅広く適用することができる。 As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to above-mentioned embodiment, A various other change is possible. Further, the internal combustion engine of the present invention is not limited to motorcycles, and can be widely applied to other types of straddle type vehicles.
　１…自動二輪車、２…フレーム、10…パワーユニット、11…内燃機関、19…マフラー支持ステー、19ａ…上部マフラー支持ステー、20…排気装置、21…排気管、24…下流側排気管、24ｃ…下流端部、24ｄ…下流開口部、24ｅ…連通孔、30…マフラー、31マフラーボディ、32…マフラー胴部、32ａ…前方開口部、33フロントカバー、33ｂ…排気管支持部、34…キャップ、35…テールカバー、36…隔壁、40…第１膨張室、41…第２膨張室、
　120…排気装置、133ｂ…排気管支持部、134…キャップ、220…排気装置、233ｂ…排気管支持部、234…キャップ、320…排気装置、333ｂ…排気管支持部、334…閉塞部、
　50…排気装置、51…排気管、51ｂ…湾曲部、52…マフラー、53…マフラーボディ、54…マフラー胴部、55…フロントカバー、56…テールカバー、57…第１隔壁、58…第２隔壁、62…第１膨張室、63…第２膨張室、64…第３膨張室、65…排気管構成部材 DESCRIPTION OF SYMBOLS 1 ... Motorcycle, 2 ... frame, 10 ... power unit, 11 ... internal combustion engine, 19 ... muffler support stay, 19a ... upper muffler support stay, 20 ... exhaust system, 21 ... exhaust pipe, 24 ... downstream exhaust pipe, 24c ... Downstream end, 24d: downstream opening, 24e: communication hole, 30: muffler, 31 muffler body, 32: muffler body, 32a: front opening, 33 front cover, 33b: exhaust pipe support, 34: cap, 35: tail cover, 36: partition wall, 40: first expansion chamber, 41: second expansion chamber,
120: exhaust system, 133b: exhaust pipe support, 134: cap, 220: exhaust system, 233b: exhaust pipe support, 234: cap, 320: exhaust system, 333b: exhaust pipe support, 334: blockage,
DESCRIPTION OF SYMBOLS 50 ... Exhaust system, 51 ... Exhaust pipe, 51b ... Curved part 52: Muffler 53: Muffler body 54: Muffler body part, 55 ... Front cover, 56 ... Tail cover, 57 ... 1st partition, 58 ... 2nd Partition wall 62: first expansion chamber 63: second expansion chamber 64: third expansion chamber 65: exhaust pipe component

Claims (6)

  1. 　内燃機関(11)の排気を排出する排気管(21,51)と、該排気管(21,51)の下流側に接続されるマフラー(30,52)を備え、前記マフラー(30,52)の内部に前記排気管(21,51)の下流部が配置される鞍乗型車両の排気装置において、
    　前記排気管(21,51)は、前記マフラー(30,52)内において車両前方から後方に延出した後、車両前方に向かって屈曲して延出され、
    　前記排気管(21,51)の下流端部(24c,65c)は、前記マフラー(30,52)の外殻部(31,53)に設けられた排気管支持部(33b,133b,233b,333b,54,57)で支持されることを特徴とする鞍乗型車両の排気装置。     The exhaust pipe (21, 51) for exhausting the exhaust gas of the internal combustion engine (11), and the muffler (30, 52) connected to the downstream side of the exhaust pipe (21, 51), the muffler (30, 52) An exhaust system of a saddle-ride type vehicle in which a downstream portion of the exhaust pipe (21, 51) is disposed in the inside of
    The exhaust pipe (21, 51) extends rearward from the front of the vehicle in the muffler (30, 52), and then bends and extends toward the front of the vehicle,
    The downstream end (24c, 65c) of the exhaust pipe (21, 51) is an exhaust pipe support (33b, 133b, 233b,) provided on the outer shell (31, 53) of the muffler (30, 52). An exhaust system of a straddle-type vehicle supported by 333 b, 54, 57).
  2. 　前記マフラー(30)は、前記マフラー(30)内に隔壁(36)が配置されて、第１膨張室(40)と第２膨張室(41)に区画され、
    　前記排気管(21)のうち、前記マフラー(30)内に配置されるマフラー内部分(24g)の全体は、前記第１膨張室(40)に配置されることを特徴とする請求項１に記載の鞍乗型車両の排気装置。     In the muffler (30), a partition (36) is disposed in the muffler (30), and the muffler (30) is divided into a first expansion chamber (40) and a second expansion chamber (41).
    The entire exhaust pipe portion (24g) disposed in the muffler (30) of the exhaust pipe (21) is disposed in the first expansion chamber (40). Exhaust system of a straddle-type vehicle according to any of the preceding claims.
  3. 　前記マフラー(30)の前記外殻部(31)は、マフラー胴部(32)と、該マフラー胴部(32)の前方開口部(32a)を閉塞するフロントカバー(33)を備え、
    　前記排気管支持部(33b,133b,233b,333b)は、前記フロントカバー(33)に設けられ、
    　前記フロントカバー(33)に、前記内燃機関(11)と前記マフラー(30)を連結するステー(19)が設けられ、
    　前記ステー(19a)は、前記フロントカバー(33)の前記排気管支持部(33b,133b,233b,333b)を覆うことを特徴とする請求項１または請求項２に記載の鞍乗型車両の排気装置。     The outer shell (31) of the muffler (30) comprises a muffler body (32) and a front cover (33) closing the front opening (32a) of the muffler body (32);
    The exhaust pipe support (33b, 133b, 233b, 333b) is provided on the front cover (33),
    The front cover (33) is provided with a stay (19) for connecting the internal combustion engine (11) and the muffler (30);
    The straddle-type vehicle according to claim 1 or 2, wherein the stay (19a) covers the exhaust pipe support (33b, 133b, 233b, 333b) of the front cover (33). Exhaust system.
  4. 　前記フロントカバー(33)の前記排気管支持部(33b,133b,233b,333b)は、前記マフラー(30)の一部が突出した凸部(33b,133b,233b,333b)であり、
    　前記排気管(21)の下流端部(24c)は、前記凸部(33b,133b,233b,333b)と前記排気管(21)の下流端部(24c)とのいずれか一方が他方に嵌合して支持されることを特徴とする請求項１ないしは請求項３のいずれかに記載の鞍乗型車両の排気装置。     The exhaust pipe support (33b, 133b, 233b, 333b) of the front cover (33) is a projection (33b, 133b, 233b, 333b) from which a part of the muffler (30) protrudes,
    The downstream end (24c) of the exhaust pipe (21) has one of the convex portion (33b, 133b, 233b, 333b) and the downstream end (24c) of the exhaust pipe (21) fitted to the other 4. The exhaust system for a straddle-type vehicle according to any one of claims 1 to 3, wherein the exhaust system is supported on the other side.
  5. 　前記排気管(21)の前記下流端部(24c)の下流開口部(24d)は、閉塞部(34,134,234,334)により閉塞され、
    　前記排気管(21)の前記下流部(24)に、前記マフラー(30)内と連通する連通孔(24e)が設けられていることを特徴とする請求項１ないし請求項４のいずれかに記載の鞍乗型車両の排気装置。     A downstream opening (24d) of the downstream end (24c) of the exhaust pipe (21) is closed by a closing part (34, 134, 234, 334);
    A communication hole (24e) communicating with the inside of the muffler (30) is provided in the downstream portion (24) of the exhaust pipe (21). Exhaust system of a straddle-type vehicle according to any of the preceding claims.
  6. 　前記排気管(51)の下流端部(65c)を支持する排気管支持部(54,57)は、前記マフラー(52)の外殻部(53)に固定される隔壁(57)の一部であることを特徴とする請求項１に記載の鞍乗型車両の排気装置。 An exhaust pipe support (54, 57) for supporting the downstream end (65c) of the exhaust pipe (51) is a part of the partition wall (57) fixed to the outer shell (53) of the muffler (52) The exhaust system for a straddle-type vehicle according to claim 1, characterized in that:
PCT/JP2018/008519 2017-03-27 2018-03-06 Saddle-type vehicle exhaust device WO2018180272A1 (en)

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JP2019509101A JP6700483B2 (en) 2017-03-27 2018-03-06 Exhaust system for saddle type vehicles
PH12019502153A PH12019502153A1 (en) 2017-03-27 2019-09-19 Exhaust apparatus for saddle-type vehicle

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07332059A (en) * 1994-06-08 1995-12-19 Hino Motors Ltd Muffler for engine
JPH0913942A (en) * 1995-06-30 1997-01-14 Yamaha Motor Co Ltd Exhaust device for motor scooter type vehicle
JP2006029293A (en) * 2004-07-21 2006-02-02 Calsonic Kansei Corp Fixing structure and method for exhaust pipe in muffler for vehicle
JP2013230756A (en) * 2012-04-27 2013-11-14 Yamaha Motor Co Ltd Saddle-ride type vehicle
JP2015143497A (en) * 2014-01-31 2015-08-06 本田技研工業株式会社 Muffler attachment structure of small vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07332059A (en) * 1994-06-08 1995-12-19 Hino Motors Ltd Muffler for engine
JPH0913942A (en) * 1995-06-30 1997-01-14 Yamaha Motor Co Ltd Exhaust device for motor scooter type vehicle
JP2006029293A (en) * 2004-07-21 2006-02-02 Calsonic Kansei Corp Fixing structure and method for exhaust pipe in muffler for vehicle
JP2013230756A (en) * 2012-04-27 2013-11-14 Yamaha Motor Co Ltd Saddle-ride type vehicle
JP2015143497A (en) * 2014-01-31 2015-08-06 本田技研工業株式会社 Muffler attachment structure of small vehicle

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JPWO2018180272A1 (en) 2020-01-23
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