JP2016173108A - Saddle-riding type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a saddle-riding type vehicle which is provided with catalytic devices in left and right exhaust gas flow passages and in which an influence on a foot grounding property of the catalytic devices is suppressed even when the catalytic devices are large in size.SOLUTION: A saddle-riding type vehicle 1 includes: exhaust gas flow passages connected to a multi-cylinder engine 29 and arranged independently on a right side and a left side of a vehicle body; a first catalytic device 31 disposed in the middle of the left side exhaust gas flow passage; a second catalytic device 32 disposed in the middle of the right side exhaust gas flow passage; and a swing arm 36 swingably and pivotally supporting a rear wheel. The saddle-riding type vehicle 1 has mufflers 33, 34 connected to downstream sides of the exhaust gas flow passages with respect to the first catalytic device 31 and the second catalytic device 32, respectively, and the first catalytic device 31 and the second catalytic device 32 are arranged side by side below the swing arm 36.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a saddle-ride type vehicle including a catalyst unit that purifies exhaust gas from an engine and a silencer.

  Conventionally, saddle riding type vehicles such as motorcycles including a body frame, an engine, and a silencer are known. The engine is fixed to the body frame. The silencer is connected to the engine via an exhaust pipe, and reduces the exhaust noise when exhaust gas is discharged.

  In a saddle-ride type vehicle including an engine having a plurality of cylinders of two or more cylinders, a configuration in which exhaust passages are arranged separately on the left and right sides of the vehicle body is known. A small-sized catalyst unit is provided in the middle of the exhaust passage of Patent Document 1 (see Patent Document 1).

Japanese Patent No. 4727503

  In the saddle-ride type vehicle, the catalyst unit is located below the driver seat. In such a position, when the driver removes his / her foot from the step when the vehicle is stopped or the like and puts his / her foot on the ground, the leg comes to the side of the catalyst unit. Here, when the size of the catalyst unit is large, for example, it may be necessary to take measures such as providing a heat shield protector on the side of the catalyst unit in the left-right direction of the vehicle body. However, if a protector is arranged on the side of the catalyst unit, the driver's legs will be separated from the vehicle body when the vehicle is stopped, which will affect the legging performance.

  An object of the present invention is to provide a saddle-ride type vehicle in which the catalyst device is provided in the left and right exhaust passages, and even if the catalyst size is large, the influence on the footing property of the catalyst device can be suppressed. .

  The invention according to claim 1 is connected to a multi-cylinder engine and is arranged independently on the left and right sides of the vehicle body, and a first catalyst device provided in the middle of the left exhaust path; In a saddle-ride type vehicle including a second catalyst device provided in the middle of the right exhaust passage and a swing arm that pivotally supports a rear wheel so that the rear wheel can swing, than the first catalyst device and the second catalyst device. And a silencer connected to each downstream of the exhaust flow path, wherein the first catalytic device and the second catalytic device are arranged side by side under the swing arm.

  The invention according to claim 2 is characterized in that the first catalyst device and the second catalyst device are arranged so that their longitudinal directions are adjacent to each other along the front-rear direction of the saddle-ride type vehicle. To do.

  The invention according to claim 3 is characterized in that the first catalyst device and the second catalyst device are arranged within a range of the width of the swing arm in the width direction with respect to the front-rear direction of the saddle-ride type vehicle.

  According to a fourth aspect of the present invention, the multi-cylinder engine is configured by a V-type engine in which left and right V banks are arranged in a vehicle width direction, the exhaust passage is formed by an exhaust pipe, and the left exhaust An inlet of the exhaust pipe that forms a flow path is attached to the left side surface of the multi-cylinder engine, and an inlet of the exhaust pipe that forms the right exhaust path is attached to a right side surface of the multi-cylinder engine, The vehicle body includes a vehicle body frame, the silencers are respectively attached to the vehicle body frame, and the saddle-ride type vehicle includes a stay portion that joins the first catalyst device and the second catalyst device. And

  The invention according to claim 5 is a portion of at least one of the side surfaces of the first catalyst device or the second catalyst device, and faces the outside of the saddle-ride type vehicle in the width direction with respect to the front-rear direction of the saddle-ride type vehicle. And a connecting pipe that connects a portion of the side surface of the silencer and a portion facing the inner side of the saddle-ride type vehicle in the width direction with respect to the front-rear direction of the saddle-ride type vehicle. And

  According to a sixth aspect of the present invention, the exhaust passage is formed by an exhaust pipe, and at least one of the first catalyst device and the second catalyst device includes a hollow cylindrical catalyst chamber and an interior of the catalyst chamber. The exhaust pipe upstream of at least one of the first catalyst device and the second catalyst device is a side portion of the catalyst chamber. And it is connected to the part which faces the outer side of the saddle-ride type vehicle in the width direction with respect to the longitudinal direction of the saddle-ride type vehicle.

  According to a seventh aspect of the present invention, the swing arm includes a pair of left and right arm portions extending in the rearward direction of the saddle-ride type vehicle, and the swing arm includes a first catalyst device and a second catalyst device. At least one and the silencer are arranged in a positional relationship that overlaps in a side view and in a positional relationship that sandwiches at least one of the arm portions in a plan view.

  According to the first aspect of the present invention, the first catalyst device and the second catalyst device are arranged side by side below the swing arm, and the first catalyst device and the second catalyst device are arranged at the dead position below the swing arm. It can be arranged in a compact space. For this reason, the first catalyst device and the second catalyst device can be separated from the position of the foot that reaches the road surface when the driver of the saddle-ride type vehicle stops, and the foot-holding property can be kept good.

  According to the second aspect of the present invention, the first catalyst device and the second catalyst device are arranged so that their longitudinal directions are adjacent to each other along the front-rear direction of the saddle riding type vehicle. The catalyst device, the second catalyst device, and the exhaust flow path can have a simple structure. Further, the first catalyst device and the second catalyst device can be arranged in a compact manner even in a relatively narrow space such as under the swing arm.

  According to the invention described in claim 3, since the first catalyst device and the second catalyst device are arranged within the range of the width of the swing arm in the width direction with respect to the front-rear direction of the saddle riding type vehicle, When the driver's feet reach the road surface, the driver's legs can be substantially prevented from coming closer to the catalyst device side than the swing arm.

  According to the fourth aspect of the present invention, the multi-cylinder engine is constituted by a V-type engine in which left and right V banks are arranged in the vehicle width direction, the exhaust passage is formed by the exhaust pipe, and the left exhaust flow The entrance of the exhaust pipe forming the road is attached to the left side of the multi-cylinder engine, the entrance of the exhaust pipe forming the right exhaust passage is attached to the right side of the multi-cylinder engine, and the vehicle body is attached to the body frame. The silencer is attached to the vehicle body frame, and the saddle-ride type vehicle includes a stay portion that joins the first catalyst device and the second catalyst device.

When the engine is a vertical V-type engine, the left exhaust pipe and the silencer, or the right exhaust pipe and the silencer, of the left and right exhaust system parts, are respectively the engine side and the vehicle body side. The first catalyst device or the second catalyst device provided between the engine and the silencer is disposed on the vehicle body center side through the exhaust pipe. That is, since the first catalyst device or the second catalyst device is attached in a cantilever shape, the first catalyst device or the second catalyst device is vertically moved with the vehicle body side attachment portion of the exhaust system part as a fulcrum. The structure is easy to vibrate. Therefore, the first catalyst device and the second catalyst device adjacent to each other are fixed to each other by the stay portion, so that the vertical swing of the first catalyst device and the second catalyst device can be easily suppressed. Therefore, the left and right exhaust system parts can be attached with high support rigidity with a simple configuration.
be able to.

According to invention of Claim 5, it is a part of the side surface of at least one side of a 1st catalyst apparatus or a 2nd catalyst apparatus, Comprising: A surface on the outer side of the saddle-ride type vehicle in the width direction with respect to the front-back direction of the saddle-ride type vehicle A connecting pipe is provided to connect the portion to the side portion of the silencer and the portion facing the inner side of the saddle-ride type vehicle in the width direction with respect to the front-rear direction of the saddle-ride type vehicle.
For this reason, since it can be set as the structure which does not have a connection pipe in the front end side of the silencer in the front-back direction of a saddle-ride type vehicle, it can make it easier to secure a space for arranging the driver's legs when stopped. it can.

  According to the sixth aspect of the present invention, the exhaust passage is formed by the exhaust pipe, and at least one of the first catalyst device and the second catalyst device includes a hollow cylindrical catalyst chamber and a front and rear in the catalyst chamber. And an exhaust pipe upstream of at least one of the first catalyst device and the second catalyst device is a portion of a side surface of the catalyst chamber, and is a saddle riding type. It is connected to the portion facing the outside of the saddle-ride type vehicle in the width direction with respect to the longitudinal direction of the vehicle.

  For this reason, since the exhaust flow in the exhaust pipe enters the cylindrical catalyst chamber from the side surface, a flow that rotates in the cylindrical space of the catalyst chamber occurs. The exhaust stream will then enter the catalyst. Therefore, the exhaust flow is prevented from flowing in a part of the catalyst body, and the entire catalyst body can be used efficiently.

According to the seventh aspect of the present invention, at least one of the first catalyst device and the second catalyst device and the silencer overlap with each other in a side view, and at least one arm portion in a plan view. It is arranged in a positional relationship across.
Therefore, the first catalyst device and the silencer are arranged offset in the left-right direction of the vehicle, or the second catalyst device and the silencer are arranged offset in the left-right direction of the vehicle. The whole can be made compact.

1 is a left side view showing a motorcycle 1 as a saddle-ride type vehicle according to an embodiment of the present invention. Fig. 2 is an enlarged left side view of the motorcycle 1 shown in Fig. 1. Fig. 2 is an enlarged bottom view of the motorcycle 1 shown in Fig. 1. Fig. 2 is an enlarged front sectional view of the motorcycle 1 shown in Fig. 1. Fig. 2 is a plan view showing a first catalyst device 31, a second catalyst device 32, silencers 33, 34 and the like of the motorcycle 1 shown in Fig. 1. FIG. 2 is a perspective view showing a first catalyst device 31 and a second catalyst device 32 of the motorcycle shown in FIG. 1. Fig. 2 is an enlarged left side view showing a silencer 33 of the motorcycle shown in Fig. 1.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, an overall configuration of a motorcycle 1 as a saddle-ride type vehicle according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a left side view showing a motorcycle 1 as a saddle-ride type vehicle according to an embodiment of the present invention. FIG. 2 is an enlarged left side view of the motorcycle 1 shown in FIG. FIG. 3 is an enlarged bottom view of the motorcycle 1 shown in FIG. FIG. 4 is an enlarged front sectional view of the motorcycle 1 shown in FIG. FIG. 5 is a plan view showing the first catalyst device 31, the second catalyst device 32, the silencers 33, 34, and the like of the motorcycle 1 shown in FIG. FIG. 6 is a perspective view showing the first catalyst device 31 and the second catalyst device 32 of the motorcycle shown in FIG. FIG. 7 is an enlarged left side view showing the silencer 33 of the motorcycle shown in FIG.

  In the following description, the front / rear, left / right, and upper / lower directions follow directions seen from the occupant (driver P) who rides the motorcycle 1 unless otherwise specified. In the figure, arrow FR indicates the front of the vehicle, arrow LH indicates the left side of the vehicle, arrow RH indicates the right side of the vehicle, and arrow UP indicates the upper side of the vehicle.

  As shown in FIG. 1, the motorcycle 1 of this embodiment includes a body frame 3, a front wheel 13, a rear wheel 35, an engine 29, silencers 33 and 34 (shown), a fuel tank 38, a center The stand S is mainly used.

The vehicle body frame 3 includes a head pipe 5, a main tube 6, a center tube 7, a down tube 8, an under tube 9, and a seat rail 11. A pair of main tubes 6 are provided on the left and right, and extend obliquely rearward from the head pipe 5. The center tube 7 extends downward from the rear end of the main tube 6. The seat rail 11 extends rearward from the main tube 6.
A pair of down tubes 8 is provided on the left and right. The pair of down tubes 8 are disposed below the main tube 6. The pair of down tubes 8 are connected to the head pipe 5 at the front end portion in a side view. The rear end portions of the pair of down tubes 8 extend obliquely downward and rearward from the head pipe 5.

  A pair of the under tubes 9 is provided on the left and right. The front end portions of the pair of under tubes 9 are connected to the lower ends of the pair of down tubes 8. The rear end portions of the pair of under tubes 9 extend rearward from the pair of down tubes 8. The vehicle body frame 3 is provided with a step ST.

  1 to 3, the center stand S is attached to the lower end portion of the center tube 7 as indicated by a two-dot chain line. The center stand S is supported by the center tube 7 so that it can be raised and lowered so that it can be stowed on the ground so that it can be stored in the lower part of the vehicle body and as shown by a solid line in FIGS. The center stand S can support the vehicle body frame 3 by being erected.

  The front wheel 13 is pivotally supported by left and right front forks 19 and 19 including an outer tube 15 and an inner tube 17. The upper part of each inner tube 17 is supported by a top bridge 21 and a bottom bridge 23. A steering stem 25 is inserted into the head pipe 5 at the top of each inner tube 17. The steering stem 25 is connected to the top bridge 21 and the bottom bridge 23. The front wheel 13 can be steered by a handle 27 provided on the top bridge 21.

  The engine 29 is a V-type four-cylinder multi-cylinder engine in which V banks are arranged in the width direction with respect to the front-rear direction of the motorcycle 1 as a saddle-ride type vehicle, that is, in the left-right direction. The engine 29 is supported by the main tube 6 and the center tube 7. A swing arm 36 (see FIG. 3) is connected to the center tube 7. As shown in FIG. 3, the swing arm 36 extends rearward from the center tube 7 in a pair in the left-right direction, and supports the rear wheel 35 so as to be swingable and rotatable. The rear wheel 35 is driven by the power of the engine 29 via a drive shaft (not shown).

  A fuel tank 38 is fixed on the main tube 6. A seat 39 is fixed on the seat rail 11. A radiator (not shown) is provided on the vehicle body frame 3 side, which is obliquely forward of the engine 29 and behind the front forks 19, 19.

  The motorcycle 1 also includes a front cowl (cow ring) 43, a wind screen (screen) 45, a side cowl 47, a seat cowl 49, a front fender 51, and a rear fender 53. The front cowl (cow ring) 43 is disposed at the front part of the motorcycle 1 and covers the front part of the main body frame and the like. A wind screen (screen) 45 is attached to an upper portion of the front cowl 43. The side cowl 47 is disposed on the side of the motorcycle 1 and covers the engine 29 and the like. The seat cowl 49 covers a lower portion of the seat 39 in the motorcycle 1. The front fender 51 covers the upper part of the front wheel 13. The rear fender 53 covers the upper part of the rear wheel 35. The motorcycle 1 is a full cowling type motorcycle.

  On the left and right sides of the front cowl 43, a pair of mirror covers 59 each covering a rearview mirror (not shown) and provided with a blinker 57 are attached. A wind guide plate (not shown) for guiding the traveling wind to the rear upper part is attached to the upper edge of the front cowl 43. A meter visor (not shown) is attached behind the air guide plate.

  Next, the details of the configuration of the exhaust system parts of the motorcycle 1 will be described. As shown in FIG. 5, the exhaust system components include a first front exhaust pipe 291, a second front exhaust pipe 292, first upstream exhaust pipes 295 and 296, second upstream exhaust pipes 297 and 298, The first catalyst device 31, the second catalyst device 32, the connecting pipes 316 and 317, and the silencers 33 and 34, and by these, the exhaust gas disposed independently on the left side and the right side of the vehicle body A flow path is formed.

  The first front exhaust pipe 291 has a mounting portion 291A, a front cylinder exhaust pipe 291B, and a rear cylinder exhaust pipe 291C. The exhaust ports of the cylinder heads of the two cylinders on the left side of the engine 29 are provided with one end portion of the front cylinder exhaust pipe 291B and one end portion of the rear cylinder exhaust pipe 291C, which are the inlets of the exhaust pipe, by the attachment portion 291A. Each is installed. The other end of the front cylinder exhaust pipe 291B and the other end of the rear cylinder exhaust pipe 291C are joined to the front ends of the first upstream exhaust pipes 295 and 296, respectively.

  The second front exhaust pipe 292 has a mounting portion 292A, a front cylinder exhaust pipe 292B, and a rear cylinder exhaust pipe 292C. The exhaust ports of the cylinder heads of the two cylinders on the right side surface of the engine 29 are provided with one end portion of the front cylinder exhaust pipe 292B and one end portion of the rear cylinder exhaust pipe 292C, which are the inlets of the exhaust pipe, by the mounting portion 292A. Each is installed. The other end of the front cylinder exhaust pipe 292B and the other end of the rear cylinder exhaust pipe 292C are joined to front ends of the second upstream exhaust pipes 297 and 298, respectively.

The first catalyst device 31 is provided in the middle of the exhaust passage on the left side of the vehicle body. The second catalyst device 32 is provided in the middle of the exhaust passage on the right side of the vehicle body. As shown in FIGS. 2 to 4, the first catalyst device 31 and the second catalyst device 32 are arranged side by side below the swing arm 36.
More specifically, as shown in FIG. 3, the first catalyst device 31 and the second catalyst device 32 are such that the longitudinal direction of the first catalyst device 31 and the longitudinal direction of the second catalyst device 32 are in the front-rear direction. It is arranged adjacent to each other in the left-right direction. The first catalyst device 31 and the second catalyst device 32 are disposed and positioned within the range of the width of the swing arm 36 in the width direction with respect to the front-rear direction of the motorcycle 1 as a saddle-ride type vehicle, that is, the left-right direction. ing. Specifically, as shown in FIG. 3, the first catalyst device 31 and the second catalyst device 32 include one arm portion 361 and the other arm portion 362 of the swing arm 36 in a bottom view (or a plan view). It is arranged between.

  As shown in FIG. 2 and the like, the first catalyst device 31 and the silencer 33 are arranged in a positional relationship that overlaps in a side view. Further, as shown in FIG. 3, the first catalyst device 31 and the silencer 33 are arranged in a positional relationship sandwiching one arm portion 361 of the swing arm 36 in a bottom view (or a plan view). Similarly, the 2nd catalyst apparatus 32 and the silencer 34 are arrange | positioned by the positional relationship which overlaps by a side view. Further, as shown in FIG. 3, the second catalyst device 32 and the silencer 34 are arranged in a positional relationship sandwiching the other arm portion 362 of the swing arm 36 in a bottom view (or a plan view).

  The first catalyst device 31 includes a catalyst chamber 311 and a catalyst main body 312. Similarly, the second catalyst device 32 includes a catalyst chamber 321 and a catalyst body 322. Each of the catalyst chambers 311 and 321 has a hollow cylindrical shape. The longitudinal direction which is the axial direction of the catalyst chambers 311 and 321 is parallel to the front-rear direction. In the front-rear direction, the front ends of the catalyst chambers 311 and 321 coincide, and the rear ends of the catalyst chambers 311 and 321 coincide.

  As shown in FIGS. 5 and 6, the catalyst chamber 311 and the catalyst chamber 321 are joined and integrated by a stay portion 313. The stay part 313 includes a first stay part 314 and a second stay part 315. The first stay portion 314 is joined to the catalyst chamber 311, and the second stay portion 315 is joined to the catalyst chamber 321. The first stay part 314 and the second stay part 315 are fixed to each other by screws and integrated.

  The catalyst main bodies 312 and 322 are portions on the front side of the internal space of the catalyst chambers 311 and 321, and are about the length of the upstream exhaust pipes 295, 296, 297 and 298 from the front ends of the catalyst chambers 311 and 321. It is arranged at the rear position. The catalyst bodies 312 and 322 are arranged so that the longitudinal direction of the catalyst bodies 312 and 322 is along the front-rear direction.

  The catalyst bodies 312 and 322 have a catalyst (see FIG. 5) composed of platinum, rhodium, or the like. The exhaust gas passing through the catalyst chambers 311 and 321 can be purified by the catalyst. The rear ends of the first upstream exhaust pipes 295 and 296, which are the exhaust pipe portions upstream of the first catalyst device 31, are joined to the side surfaces of the catalyst chamber 311. Similarly, rear end portions of second upstream exhaust pipes 297 and 298 that are upstream exhaust pipe portions of the second catalyst device 32 are joined to the side surfaces of the catalyst chamber 321. More specifically, this joining position is a portion of the catalyst chambers 311 and 321 and a portion of the front side of the front ends of the catalyst main bodies 312 and 322.

  The first upstream exhaust pipes 295 and 296 are joined to the left side surface of the catalyst chamber 311. The second upstream exhaust pipes 297 and 298 are joined to the right side surface of the catalyst chamber 321.

  As shown in FIG. 5 and the like, the silencers 33 and 34 are respectively connected to the first catalyst device 31 and the second catalyst device 32 by the connection pipes 316 and 317 as described above. In other words, the silencer 33 is provided downstream of the left exhaust channel from the first catalyst device 31. Further, the silencer 34 is provided downstream of the right-side exhaust passage from the second catalyst device 32.

Specifically, the catalyst chambers 311 and 321 are connected to the silencers 33 and 34 via connection pipes 316 and 317, respectively.
One end of the connection pipe 316 is connected to a portion facing the outside of the first catalyst device 31, that is, a rear portion of the left side surface of the first catalyst device 31. One end portion of the connection pipe 317 is connected to a portion facing the outside of the second catalyst device 32, that is, a rear portion of the right side surface of the side surface.

  The other ends of the connecting pipes 316 and 317 are connected to the inner side surfaces of the silencers 33 and 34 in the vehicle width direction, respectively.

More specifically, the other end of the connection pipe 316 is connected to the front part of the right side surface of the silencer 33. The other end of the connection pipe 316 extends to the space inside the silencer 33. The other end of the connection pipe 317 is connected to the front part of the left side surface of the silencer 34. The other end of the connection pipe 317 extends to the space inside the silencer 34.
The other ends of the connecting pipes 316 and 317 are closed. As shown in FIG. 7, a plurality of communication holes 318 and 319 for communicating the inside and the outside of the connection pipes 316 and 317 are formed on the side surfaces of the connection pipes 316 and 317 located in the spaces inside the silencers 33 and 34. Is formed.

  The silencers 33 and 34 have a symmetrical relationship with respect to the center of the motorcycle 1 in the left-right direction. Accordingly, only the left silencer 33 will be described below, and the description of the right silencer 34 will be omitted.

  The silencer 33 has a hollow cylindrical shape. Both ends in the axial direction of the silencer 33 are closed. In the space inside the silencer 33, a discharge pipe 331 is provided at the rear end of the silencer 33. The discharge pipe 331 has a front end closed and a rear end opened. The discharge pipe 331 passes through the lid member 334 that closes the rear end of the silencer 33. The front half of the discharge pipe 331 is located in the space inside the silencer 33, and the rear half of the discharge pipe 331 is exposed to the outside of the silencer 33. A plurality of communication holes 332 are formed in the side surface of the front half portion of the discharge pipe 331.

  As shown in FIG. 7, the silencer 33 includes a support portion 333. One end portion of the support portion 333 is joined to the silencer 33, and the other end portion is fixed to the pinion step bracket 28 fixed to the vehicle body frame 3 with screws as shown in FIG. . Accordingly, the silencers 33 and 34 are attached to the vehicle body frame 3 via the support portion 333 and the pinion step bracket 28.

According to the embodiment of the present invention, the following effects can be obtained.
Since the first catalyst device 31 and the second catalyst device 32 are arranged side by side below the swing arm 36, the first catalyst device 31 and the second catalyst device 32 having large catalyst bodies 312 and 322 are connected to the swing arm 36. It can be arranged compactly in the dead space below. Therefore, as shown by the two-dot chain line in FIGS. 1 and 4, when the motorcycle 1 stops, the driver P of the motorcycle 1 removes the foot F1 from the step when the motorcycle 1 stops, and the foot F2 arrives on the road surface. Sometimes, the first catalyst device 31 and the second catalyst device 32 can be separated from the position of the leg L of the driver P of the motorcycle 1, and the footing property can be kept good.

  Further, the first catalyst device 31 and the second catalyst device 32 are adjacent to each other so that the longitudinal direction of the first catalyst device 31 and the longitudinal direction of the second catalyst device 32 are along the front-rear direction of the motorcycle 1. Since they are arranged, the first catalyst device 31, the second catalyst device 32, and the exhaust flow path can have a simple structure. Furthermore, the first catalyst device 31 and the second catalyst device 32 can be arranged in a compact manner even in a relatively narrow space such as under the swing arm 36.

  Further, since the first catalyst device 31 and the second catalyst device 32 are located within the width of the swing arm 36 in the width direction (left-right direction) with respect to the front-rear direction of the motorcycle 1, the driver at the time of stopping or the like The leg L of P can be substantially prevented from approaching the catalyst device side with respect to the swing arm 36.

  The multi-cylinder engine is constituted by a V-type engine 29 in which V banks are arranged in the width direction (left-right direction) with respect to the front-rear direction of the motorcycle 1, and the exhaust passage is formed by an exhaust pipe, and the left exhaust flow The exhaust pipe entrance that forms the road is attached to the left side of the multi-cylinder engine, the exhaust pipe entrance that forms the right exhaust passage is attached to the right side of the multi-cylinder engine, and the vehicle body is attached to the body frame 3. And the mufflers 33 and 34 are respectively attached to the vehicle body frame 3, and the motorcycle 1 as the motorcycle 1 includes a stay portion 313 that joins the first catalyst device 31 and the second catalyst device 32.

  If the engine 29 is a vertical V-type engine, of the left and right exhaust system components, the left exhaust pipe (first front exhaust pipe 291, first upstream exhaust pipe 295, first upstream exhaust pipe 296, connection pipe) 316) and the silencer 33 are attached to the left side of the engine 29 and the left side of the vehicle body, respectively, and the first catalyst device 31 provided between the engine 29 and the silencer 33 is connected via an exhaust pipe. Located on the center of the car. Similarly, the second catalyst device 32, the right exhaust pipe (the second front exhaust pipe 292, the second upstream exhaust pipe 297, the second upstream exhaust pipe 298, the connection pipe 317), and the silencer 34 are respectively connected to the engine. A second catalyst device 32 attached to the right side surface of 29 and the right side portion of the vehicle body and provided between the engine 29 and the silencer 34 is disposed on the vehicle body center side via an exhaust pipe.

  That is, since the first catalyst device 31 or the second catalyst device 32 is mounted in a cantilever shape, the first catalyst device 31 or the second catalyst device 32 is a fulcrum on the vehicle body side mounting portion of the exhaust system component. As shown in FIG. Therefore, the first catalyst device 31 and the second catalyst device 32 that are adjacent to each other are fixed to each other by the stay portion 313, so that the vertical swing of the first catalyst device 31 and the second catalyst device 32 can be easily suppressed. Therefore, the left and right exhaust system parts can be attached with high support rigidity with a simple configuration.

Further, the side portions of the first catalyst device 31 and the second catalyst device 32, the portion facing the outside of the motorcycle 1 in the width direction (left-right direction) with respect to the front-rear direction of the motorcycle 1, a silencer 33, 34, connecting pipes 316 and 317 are provided for connecting a portion facing the inner side of the motorcycle 1 in the width direction (left and right direction) with respect to the front-rear direction of the motorcycle 1.
For this reason, it can be set as the structure which does not have the connecting pipes 316 and 317 in the front-end side of the silencer 33 and 34 in the front-back direction of the motorcycle 1. As a result, in the front-rear direction, a space for placing the leg L of the driver P when the driver P's foot F2 arrives on the road surface when the vehicle stops is between the silencers 33, 34 and the step. It can be made easier.

  The first catalyst device 31 and the second catalyst device 32 include hollow cylindrical catalyst chambers 311 and 321 and catalyst main bodies 312 and 322 arranged in the catalyst chambers 311 and 321 along the front-rear direction. The exhaust pipe upstream of the first catalyst device 31 and the second catalyst device 32 is a side portion of the catalyst chambers 311 and 321 and is a motorcycle in the width direction (left-right direction) with respect to the front-rear direction of the motorcycle 1. 1 is connected to the portion facing the outside.

  For this reason, since the exhaust flow in the exhaust pipe enters the cylindrical catalyst chambers 311 and 321 from the side surface, a flow that rotates in the cylindrical space of the catalyst chambers 311 and 321 occurs. The exhaust stream will then enter the catalyst. Therefore, the exhaust flow is prevented from flowing in a part of the catalyst bodies 312 and 322, and the entire catalyst bodies 312 and 322 can be used efficiently.

Further, the first catalyst device 31 and the silencer 33 are arranged in a positional relationship that overlaps in a side view and in a positional relationship that sandwiches the arm portion 361 in a plan view. Further, the second catalyst device 32 and the silencer 34 are arranged so as to overlap each other in a side view and in a position relationship that sandwiches the other arm portion 362 in a plan view.
For this reason, the first catalyst device 31 and the silencer 33 are arranged offset in the left-right direction of the vehicle, or the second catalyst device 32 and the silencer 34 are arranged offset in the left-right direction of the vehicle. Therefore, the entire apparatus can be made compact.

<Modification>
In the above embodiment, the present invention is applied to the motorcycle 1. However, the present invention is not limited to a motorcycle, and can be applied to a three-wheeled vehicle. It is also possible to apply.

  Further, a connecting pipe 316 is formed on a side portion of the first catalyst device 31 and the second catalyst device 32 and facing the outside of the motorcycle 1 in the width direction (left-right direction) with respect to the front-rear direction of the motorcycle 1. However, the present invention is not limited to this. A connecting pipe may be connected to at least one of the first catalyst device 31 and the second catalyst device 32.

  In addition, the connecting pipes 316 and 317 are connected to the side portions of the silencers 33 and 34 and facing the inner side of the motorcycle 1 in the width direction (left and right direction) with respect to the front and rear direction of the motorcycle 1. However, the present invention is not limited to this. In any one of the silencers 33 and 34, a connection pipe may be connected to a portion facing the inside of the motorcycle 1.

  The first catalyst device 31 and the second catalyst device 32 include hollow cylindrical catalyst chambers 311 and 321, and catalyst main bodies 312 and 322 arranged in the catalyst chambers 311 and 321 along the front-rear direction. However, it is not limited to this. Any one of the first catalyst device 31 and the second catalyst device 32 may include a catalyst chamber and a catalyst body.

  In addition, the first catalyst device 31 and the silencer 33 are disposed so as to overlap each other in a side view and in a position relationship between which one arm portion 361 is sandwiched in a plan view. Further, the second catalyst device 32 and the silencer 34 are disposed so as to overlap with each other in a side view and in a position relationship to sandwich the other arm portion 362 in a plan view. However, in this way, both the one arm portion 361 and the other arm portion 362 need not have such a positional relationship. It is sufficient that at least one arm portion has such a positional relationship.

1 Motorcycle (saddle-ride type vehicle)
3 Body frame 29 V-type engine (multi-cylinder engine)
31 First catalyst device 32 Second catalyst devices 33 and 34 Silencer 36 Swing arm 291 First front exhaust pipe (exhaust pipe)
291B Front cylinder exhaust pipe (exhaust pipe)
291C Rear cylinder exhaust pipe (exhaust pipe)
292 Second front exhaust pipe (exhaust pipe)
292B Front cylinder exhaust pipe (exhaust pipe)
292C Rear cylinder exhaust pipe (exhaust pipe)
295, 296 First upstream exhaust pipe (exhaust pipe)
297, 298 Second upstream exhaust pipe (exhaust pipe)
311, 321 Catalyst chamber 312, 322 Catalyst body 313 Stay part 316, 317 Connecting pipe 361, 362 Arm part

Claims (7)

An exhaust passage connected to a multi-cylinder engine and arranged independently on the left and right sides of the vehicle body;
A first catalyst device (31) provided in the middle of the left exhaust passage;
A second catalyst device (32) provided in the middle of the right exhaust flow path;
In a saddle-ride type vehicle provided with a swing arm (36) for pivotally supporting a rear wheel,
A silencer (33, 34) connected to the downstream side of the exhaust flow path from the first catalyst device (31) and the second catalyst device (32), respectively.
The saddle-ride type vehicle, wherein the first catalyst device (31) and the second catalyst device (32) are arranged side by side below the swing arm (36).   The first catalyst device (31) and the second catalyst device (32) are arranged such that their longitudinal directions are adjacent to each other along the front-rear direction of the saddle-ride type vehicle. The saddle-ride type vehicle according to 1.   The first catalyst device (31) and the second catalyst device (32) are disposed within a range of a width of a swing arm (36) in a width direction with respect to a front-rear direction of the saddle riding type vehicle. Item 6. The saddle riding type vehicle according to item 2. The multi-cylinder engine is composed of a V-type engine in which left and right V banks are arranged in the vehicle width direction.
The exhaust passage is formed by an exhaust pipe, and an inlet of the exhaust pipe that forms the left exhaust passage is attached to a left side surface of the multi-cylinder engine, and the exhaust that forms the right exhaust passage The inlet of the pipe is attached to the right side of the multi-cylinder engine,
The vehicle body has a vehicle body frame, and the silencers (33, 34) are respectively attached to the vehicle body frame.
The saddle riding type vehicle according to claim 2, further comprising a stay portion (313) for joining the first catalytic device (31) and the second catalytic device (32).   A portion of at least one side surface of the first catalyst device (31) or the second catalyst device (32), the portion facing the outside of the saddle-ride type vehicle in the width direction with respect to the front-rear direction of the saddle-ride type vehicle; Connection pipes (316, 317) connecting side portions of the silencer (33, 34) and facing the inner side of the saddle-ride type vehicle in the width direction with respect to the front-rear direction of the saddle-ride type vehicle. The saddle-ride type vehicle according to claim 1, wherein the saddle-ride type vehicle is provided. The exhaust passage is formed by an exhaust pipe,
At least one of the first catalyst device (31) and the second catalyst device (32) includes a hollow cylindrical catalyst chamber (311 and 321) and a front and rear direction in the catalyst chamber (311 and 321). Catalyst body (312, 322) arranged along
The exhaust pipe upstream of at least one of the first catalyst device (31) and the second catalyst device (32) is a portion of a side surface of the catalyst chamber (311 321), and is a saddle ride. 2. The saddle riding type vehicle according to claim 1, wherein the saddle riding type vehicle is connected to a portion facing the outside of the saddle riding type vehicle in a width direction with respect to the front-rear direction of the type vehicle. The swing arm (36) has left and right arm portions (361, 362) extending in the rearward direction of the saddle-ride type vehicle in pairs,
At least one of the first catalyst device (31) and the second catalyst device (32) and the silencer (33, 34) overlap each other in a side view and at least one in a plan view The saddle-ride type vehicle according to claim 1, wherein the saddle-ride type vehicle is disposed in a positional relationship with the arm portions (361, 362) therebetween.

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