JP6107025B6 - Exhaust valve actuator arrangement structure for motorcycles - Google Patents

Description

  The present invention relates to an exhaust valve actuator arrangement structure for a motorcycle.

  2. Description of the Related Art A motorcycle having an exhaust valve that adjusts an exhaust flow rate of an engine is known. The exhaust valve is disposed in the side cover below the seat frame.

JP 2008-106644 A

  By the way, in the space under the seat surrounded by the seat frame and the side cover, a large-sized device having a relatively large volume and outer dimensions such as a secondary battery and an ABS (Antilock Braking System) device is arranged. Is done.

  In a conventional motorcycle exhaust valve actuator arrangement structure, an exhaust valve actuator is arranged in a space under the seat, more specifically, in a side cover. In this case, the exhaust valve actuator may be disposed at a position farther from the exhaust valve, for example, at the rear end side of the vehicle, for convenience of arrangement with other large-sized devices. As the distance between the exhaust valve and the actuator increases, the length of the cable that transmits the driving force from the actuator to the exhaust valve also increases, increasing the number of holding points in the middle of the cable and increasing the sliding resistance with the sheath protecting the cable. Invited, not preferable.

  On the other hand, the drive pulley connected to the actuator is also arranged in the space under the seat, more specifically, in the side cover. In order to secure a space for arranging the drive pulley, the space in the side cover is expanded in the width direction, and the width dimension of the vehicle is expanded, thereby impairing the ride comfort of the passenger.

  Therefore, the present invention can improve the wiring route of the harness that transmits the driving force from the actuator to the exhaust valve from the viewpoint of suppressing the sliding resistance between the cable and the sheath, and can suppress the expansion of the width dimension of the vehicle. We propose an exhaust valve actuator arrangement structure for motorcycles.

In order to solve the above-described problem, an exhaust valve actuator arrangement structure for a motorcycle according to the present invention is provided between a pair of left and right seat frames provided at a rear portion of a vehicle body frame and extending rearward of the vehicle, and between the left and right seat frames. A bridge extending in the left-right direction of the vehicle, an exhaust pipe for guiding exhaust of an engine mounted on the vehicle body frame to the rear of the vehicle, an exhaust valve provided in the exhaust pipe for adjusting an exhaust flow rate of the engine, An actuator fixed to a bridge to generate an opening / closing driving force of the exhaust valve; a driving pulley provided on an output shaft of the actuator and having a rotation surface substantially parallel to a lower edge of the seat frame; and the driving pulley and a cable for transmitting the driving force to the exhaust valve from the actuator, the lower surface of the bridge An output shaft that is disposed between the left and right seat frames and that transmits the opening / closing driving force of the exhaust valve to the drive pulley protrudes from the bottom surface of the actuator, and the drive pulley is fixed to the output shaft. Facing the bottom surface of the actuator, the rotation surface of the drive pulley is orthogonal to the output shaft, and is arranged substantially parallel to the bottom surface of the actuator, and the cable is routed along the rotation surface of the drive pulley. Is done .

  ADVANTAGE OF THE INVENTION According to this invention, in the wiring route of the harness which transmits a driving force from an actuator to an exhaust valve, it can improve from a viewpoint of suppression of the sliding resistance of a cable and a sheath, and can suppress the expansion of the width dimension of a vehicle. An exhaust valve actuator arrangement structure for a motorcycle can be provided.

1 is a right side view showing a motorcycle according to an embodiment of the present invention. 1 is a left side view showing a motorcycle according to an embodiment of the present invention. The perspective view which shows the exhaust valve actuator arrangement structure of the motorcycle which concerns on embodiment of this invention from the left rear of a vehicle. The right view which shows the exhaust valve actuator arrangement structure of the motorcycle which concerns on embodiment of this invention. The right view which shows the exhaust valve actuator arrangement structure of the motorcycle which concerns on embodiment of this invention. 1 is a left side view showing an exhaust valve actuator arrangement structure for a motorcycle according to an embodiment of the present invention. 1 is a plan view showing an exhaust valve actuator arrangement structure for a motorcycle according to an embodiment of the present invention. The rear view which shows the exhaust valve actuator arrangement structure of the motorcycle which concerns on embodiment of this invention. 1 is a cross-sectional view showing an exhaust valve actuator arrangement structure for a motorcycle according to an embodiment of the present invention. 1 is a cross-sectional view showing an exhaust valve actuator arrangement structure for a motorcycle according to an embodiment of the present invention.

  Embodiments of an exhaust valve actuator arrangement structure for a motorcycle according to the present invention will be described below with reference to FIGS.

  FIG. 1 is a right side view showing a motorcycle according to an embodiment of the present invention.

  FIG. 2 is a left side view showing the motorcycle according to the embodiment of the present invention.

  As shown in FIGS. 1 and 2, the motorcycle 1 according to the present embodiment is disposed in front of the vehicle body frame 2, a vehicle body frame 2 that extends in the front-rear direction of the vehicle, a V-type engine 3 that is fixed to the vehicle body frame 2. The steering mechanism 5 is supported so as to be steerable in the left-right direction of the vehicle, the front wheel 6 is disposed in front of the body frame 2 and is rotatably supported by the steering mechanism 5, and is disposed behind the body frame 2. A rear wheel suspension device 7 that is swingably supported in the vertical direction of the vehicle and a rear wheel 9 that is disposed behind the vehicle body frame 2 and is rotatably supported by the rear wheel suspension device 7 are provided.

  In the following description, the up / down / front / rear and left / right directions are defined as the left side of the motorcycle 1 when viewed from the passenger of the motorcycle 1 and the right hand side of the motorcycle 1 when viewed from the passenger. The head side of the passenger of the motorcycle 1 is defined as the upper side of the motorcycle 1 and the opposite side is defined as the lower side of the motorcycle 1. The direction of each part constituting the motorcycle 1 is the same as that of the motorcycle 1.

  The body frame 2 is, for example, a twin tube type. The vehicle body frame 2 includes a head pipe 11 disposed at the front of the vehicle body frame 2, a pair of left and right main frames 12 extending in the vehicle width direction immediately after the head pipe 11 and extending obliquely rearward and downward, A pair of left and right center frames 13 integrally connected to the rear end portion and extending substantially downward and a pair of left and right seat frames 15 extending obliquely rearward and upward from the rear end of the main frame 12 are provided.

  The main frame 12 extends in the width direction of the vehicle to an appropriate width suitable for an occupant to straddle.

  The head pipe 11 supports the steering mechanism 5 so as to be steerable.

  The center frame 13 includes a pivot portion 16. The pivot portion 16 supports the rear wheel suspension device 7 in a swingable manner.

  The V-type engine 3 is disposed between the front wheel 6 and the rear wheel 9 when viewed in the front-rear direction of the vehicle, and is provided on the vehicle body frame 2. The V-type engine 3 includes a cylinder row inclined in a V shape. The V-type engine 3 includes a front cylinder 18 disposed on the front side of the vehicle and a rear cylinder 19 disposed on the rear side. The intake side of the V-type engine 3 is connected to a throttle body (not shown). On the other hand, the exhaust side of the V-type engine 3 is connected to the exhaust pipe 21.

  The exhaust pipe 21 hangs down from the front cylinder 18 and extends below the V-type engine 3 to the rear of the vehicle, and the exhaust pipe 21 hangs down from the rear cylinder 19 and below the V-type engine 3 to the front of the vehicle. And a rear exhaust pipe 23 that reverses and merges with the front exhaust pipe 22, and an exhaust muffler 25 that guides the exhaust gas that has joined from the front exhaust pipe 22 and the rear exhaust pipe 23 to the rear of the right side surface of the vehicle.

  The power of the V-type engine 3 is transmitted to the rear wheel 9 sequentially through a drive sprocket (not shown), a chain (not shown), and a driven sprocket (not shown).

  The steering mechanism 5 is steered left and right around the head pipe 11. The steering mechanism 5 includes a steering head 26 rotatably supported by the head pipe 11, a pair of left and right front forks 27 provided on the steering head 26, and a front fork 27 that partially covers an upper portion of the front wheel 6. A front fender 28 and a handle 29 provided on the top of the steering head 26 are provided.

  The front fork 27 includes a suspension mechanism (not shown) to ground the front wheel 6.

  The rear wheel suspension device 7 swings around the pivot portion 16. The rear wheel suspension device 7 includes a swing arm 31 that extends from the pivot portion 16 toward the rear of the vehicle, a rear wheel 9 that is rotatably supported by the rear end portion of the swing arm 31, and a space between the swing arm 31 and the vehicle body frame 2. And a rear cushion unit 32 installed on the vehicle.

  The swing arm 31 includes a front end portion that is swingably supported by the pivot portion 16.

  The rear cushion unit 32 is disposed substantially at the center in the front-rear direction of the vehicle and cushions the vehicle body frame 2 and the swing arm 31. The rear cushion unit 32 is connected to the swing arm 31 via a link mechanism 34.

  The motorcycle 1 further includes a fuel tank 33 disposed above the V-type engine 3 and supported by the vehicle body frame 2, a passenger seat 35 disposed behind the fuel tank 33, a lower portion of the seat 35, and A frame cover 36 that covers the rear and a rear fender 37 that partially covers the upper portion of the rear wheel 9 are provided.

  Furthermore, the motorcycle 1 includes a streamlined cowling 38 that covers the front of the vehicle body. The cowling 38 reduces air resistance during traveling of the motorcycle 1 and protects the rider from traveling wind pressure.

  Next, the exhaust valve actuator arrangement structure 71 of the motorcycle 1 will be described in detail.

  FIG. 3 is a perspective view showing the exhaust valve actuator arrangement structure of the motorcycle according to the embodiment of the present invention from the left rear side of the vehicle.

  FIG. 4 is a right side view showing the exhaust valve actuator arrangement structure of the motorcycle according to the embodiment of the present invention.

  FIG. 5 is a right side view showing the exhaust valve actuator arrangement structure of the motorcycle according to the embodiment of the present invention.

  FIG. 6 is a left side view showing the exhaust valve actuator arrangement structure of the motorcycle according to the embodiment of the present invention.

  FIG. 7 is a plan view showing an exhaust valve actuator arrangement structure of the motorcycle according to the embodiment of the present invention.

  FIG. 8 is a rear view showing the exhaust valve actuator arrangement structure of the motorcycle according to the embodiment of the present invention.

  FIG. 9 is a cross-sectional view showing the exhaust valve actuator arrangement structure of the motorcycle according to the embodiment of the present invention, taken along line IX-IX in FIG.

  FIG. 10 is a cross-sectional view showing the exhaust valve actuator arrangement structure of the motorcycle according to the embodiment of the present invention, taken along line XX of FIG.

  5 is a diagram showing the fuel tank 33, the seat 35, the frame cover 36, the rear fender 37, the cowling 38, and the like from FIG.

  As shown in FIGS. 3 to 10, the exhaust valve actuator arrangement structure 71 of the motorcycle 1 according to the present embodiment includes a seat frame 15 provided at the rear portion of the vehicle body frame 2 and extending rearward of the vehicle, and the vehicle body frame 2. The exhaust pipe 21 that guides the exhaust of the mounted V-type engine 3 to the rear of the vehicle, the exhaust valve 72 that is provided in the exhaust pipe 21 and adjusts the exhaust flow rate of the V-type engine 3, and is fixed to the seat frame 15 and exhausted An actuator 73 that generates an opening / closing driving force for the valve 72, a driving pulley 76 that is provided on the output shaft 75 of the actuator 73 and has a rotation surface P substantially parallel to the lower edge of the seat frame 15, and exhausted from the driving pulley 76 And a cable 77 that transmits a driving force to the valve 72.

  The seat frame 15 includes a pair of left and right upper frames 78 and a pair of left and right lower frames 79. The front end portions of the left and right upper frames 78 are connected to the rear end upper portion of the main frame 12. The front end portions of the left and right lower frames 79 are connected to the lower rear end portions of the main frame 12. Then, the rear end portions of the left and right upper frames 78 and the left and right lower frames 79 are joined and connected at the rear portion of the vehicle.

  In addition, the seat frame 15 is installed between an auxiliary frame 80 installed at appropriate positions in the longitudinal direction of the left and right upper frames 78 and the left and right lower frames 79, and the left and right auxiliary frames 80. And a bridge 81 extending in the left-right direction. The bridge 81 may be installed between the left and right upper frames 78 or between the lower frames 79.

  The pair of left and right seat frames 15 support the seat 35 with the upper frame 78, and support the ABS unit 82 and the secondary battery 83 sandwiched below the seat 35. The ABS unit 82 is disposed immediately after the rear cushion unit 32, and the secondary battery 83 is disposed behind the ABS unit 82. The secondary battery 83 having a rectangular parallelepiped shape is mounted with the bottom portion inclined to the front side and the top portion inclined to the rear side.

  The V-type engine 3 is a 4-stroke V-type 2-cylinder engine. However, the present invention is not limited to this, and an engine of V-type four cylinders or more may be used. Further, the cylinder arrangement may be other than the V type.

  The V-type engine 3 includes a crankcase 51 that houses a crankshaft (not shown) that extends in the width direction (left-right direction) of the vehicle, a front cylinder 18 that extends obliquely upward from the front upper portion of the crankcase 51, and a front cylinder. 18, a rear cylinder 19 that extends obliquely rearward and upward from an immediately rear portion of the 18, an oil pan 52 provided at a lower portion of the crankcase 51, and an oil filter 53 provided at a front lower portion of the crankcase 51.

  The crankcase 51 accommodates a crankshaft in the front half and a clutch (not shown) and a transmission (not shown) in the rear half.

  The front cylinder 18 and the rear cylinder 19 open in a V shape in a side view of the vehicle, respectively, a cylinder body 55 provided in the crankcase 51, a cylinder head 56 that closes the upper end of the cylinder body 55, and an upper end of the cylinder head 56 And a head cover 57 for closing.

  The front exhaust pipe 22, the rear exhaust pipe 23, the collecting pipe 42 and the chamber 45 are a part of the exhaust pipe 21. The exhaust pipe 21 includes an exhaust muffler 25 in addition to the front exhaust pipe 22, the rear exhaust pipe 23, the collecting pipe 42 and the chamber 45.

  The front exhaust pipe 22 is connected to the exhaust port of the front cylinder 18 and extends downward in front of the vehicle, hangs down while being bent, and is an area L below the V-type engine 3 (hereinafter referred to as “lower area L”). )), The lower region L extends substantially linearly toward the rear of the vehicle and reaches the collecting pipe 42. The straight portion of the front exhaust pipe 22 approaches the vicinity of the left side edge of the V-type engine 3 or the vehicle body frame 2 in the lower region L.

  The rear exhaust pipe 23 is connected to the exhaust port of the rear cylinder 19 and extends rearward of the vehicle for the convenience of the rear wheel 9, the swing arm 31, the rear cushion unit 32, and the link mechanism 34. It is separated from the V-type engine 3 and at the position reaching the side of the rear cushion unit 32, it is arranged substantially straight down on the right side of the rear cushion unit 32, reaches the lower region L of the V-type engine 3, and the lower region L is The U-shaped bent portion that extends in a straight line toward the front of the chamber 45 and is arranged on the right side of the chamber 45, bends in a U shape in the region extending from the vicinity of the front end of the chamber 45 to the right side of the collecting pipe 42, and reverses. It passes through 59 and reaches the collecting pipe 42.

  The collecting pipe 42 is connected to the front exhaust pipe 22 and the rear exhaust pipe 23, and combines the exhaust of the front cylinder 18 guided by the front exhaust pipe 22 and the exhaust of the rear cylinder 19 guided by the rear exhaust pipe 23. Into the chamber 45.

  The chamber 45 has a cylindrical shape that is larger in diameter and shorter than the front exhaust pipe 22 and the rear exhaust pipe 23, and is connected to the collecting pipe 42. The chamber 45 is behind the straight portion of the front exhaust pipe 22 and approaches the vicinity of the left side edge of the V-type engine 3 or the vehicle body frame 2 in the lower region L. The sum of the tube diameters of the straight exhaust pipe 23 lined up on the right side of the chamber 45 and the chamber is the width dimension of the V-type engine 3 or the vehicle body frame 2 from the viewpoint of securing the bank angle of the motorcycle 1. It is preferable that it is smaller and does not protrude to the side.

  The exhaust muffler 25 is connected to the rear end of the chamber 45, extends from the vicinity of the left side of the vehicle to the right side of the vehicle while bypassing the rear exhaust pipe 23, and extends obliquely rearward and upward.

  The exhaust valve 72 is provided in the exhaust muffler 25 on the downstream side of the chamber 45, and changes the cross-sectional area of the exhaust passage at that location. The exhaust valve 72 is provided outside the valve box 85, a valve box 85 that forms part of the exhaust path, a valve body (not shown) that is housed in the valve box 85 and changes the cross-sectional area of the exhaust path, and And a driven pulley 86 for driving the valve body. The exhaust valve 72 is provided in a portion of the exhaust muffler 25 that bypasses the rear exhaust pipe 23.

  The actuator 73 is provided on the lower surface of the bridge 81, is disposed below the ABS unit 82, faces the bottom surface of the secondary battery 83, and is sandwiched between the pair of left and right seat frames 15. The actuator 73 has a flat rectangular parallelepiped shape. The top surface having a large area is directed toward the ABS unit 82, and the bottom surface having an equivalent area as a pair of the top surfaces is provided along the lower edge of the seat frame 15. An output shaft 75 that transmits the opening / closing driving force of the exhaust valve 72 to the driving pulley 76 projects from the bottom surface of the actuator 73.

  The actuator 73 is disposed substantially directly above the exhaust valve 72 in a vehicle side view. Actuator 73 has a portion that overlaps rear cushion unit 32 in a side view of the vehicle.

  The drive pulley 76 is fixed to the output shaft 75 of the actuator 73 and faces the bottom surface of the actuator 73. The rotational surface P of the drive pulley 76 is orthogonal to the output shaft 75 and is disposed substantially parallel to the bottom surface of the actuator 73. The rotational surface P of the drive pulley 76 is in a substantially parallel positional relationship with the lower edge of the seat frame 15. The exhaust valve actuator arrangement structure 71 of the motorcycle 1 is a cable that is routed along the vehicle body frame 2 because the rotation surface P of the drive pulley 76 is in a substantially parallel positional relationship with the lower edge of the seat frame 15. A radius of curvature of 77 is secured and sliding resistance is suppressed.

  Further, the drive pulley 76 in the present embodiment is disposed below the lower edge of the seat frame 15, and the rotation surface P faces the lower edge of the seat frame 15, but below the seat 35 sandwiched between the pair of left and right seat frames 15. It may be arranged in the space.

  The cable 77 is covered and protected by a flexible sheath 87. The cable 77 is guided to the front end portion of the right seat frame 15a substantially along the rotation surface P of the drive pulley 76, and gently curves downward at the joint between the right seat frame 15a and the right center frame 13a. It hangs down along the center frame 13a, bends gently from the right center frame 13a toward the rear of the vehicle below the swing arm 31, extends toward the rear of the vehicle and approaches the exhaust muffler 25. Connected to the driven pulley 86. The cable 77 is fixed by a clamp 88 at an appropriate position along the right center frame 13a so as not to loosen.

  A portion of the cable 77 that is led to the front end portion of the right seat frame 15 a substantially along the rotation surface P of the drive pulley 76 passes through the flat occupied area E along the lower edges of the pair of left and right seat frames 15.

  In the exhaust valve actuator arrangement structure 71 of the motorcycle 1 according to this embodiment, the rotation surface P of the drive pulley 76 is made to face the lower edge of the seat frame 15 so that the cable 77 is gently bent, and the radius of curvature is as large as possible. It can be along the seat frame 15 or the body frame 2. Thereby, the exhaust valve actuator arrangement structure 71 of the motorcycle 1 can reduce the sliding resistance of the cable 77.

  Further, in the exhaust valve actuator arrangement structure 71 of the motorcycle 1 according to the present embodiment, the cable 77 is connected to the seat frame 15, particularly the lower frame, by causing the rotation surface P of the drive pulley 76 to face the lower edge of the seat frame 15. 79. Thus, the exhaust valve actuator arrangement structure 71 of the motorcycle 1 according to the present embodiment is compared with the case where the rotation surface P of the drive pulley 76 is set up in the vertical direction of the vehicle (that is, the actuator 73 is arranged vertically and flat). Thus, it is easy to secure a space for accommodating the ABS unit 82 and the secondary battery 83 in the space below the seat 35 sandwiched between the pair of left and right seat frames 15 without requiring a large arrangement space in the vertical direction of the vehicle. Further, the exhaust valve actuator arrangement structure 71 of the motorcycle 1 according to the present embodiment does not require a large arrangement space in the vertical direction of the vehicle compared to the case where the actuator 73 is arranged vertically and flatly, and the ABS unit 82, An actuator 73 can be disposed below the secondary battery 83. Thereby, the exhaust valve actuator arrangement structure 71 of the motorcycle 1 according to the present embodiment is compared with the case where the actuator 73 is arranged vertically and flatly on either the left or right side of the ABS unit 82 or the secondary battery 83. The ride comfort can be improved by suppressing the increase in the width of the vehicle.

  Further, in the exhaust valve actuator arrangement structure 71 of the motorcycle 1 according to the present embodiment, the drive pulley 76 is opposed to the bottom surface of the actuator 73, so that the upper portion of the drive pulley 76 is covered with the actuator 73. Thereby, the exhaust valve actuator arrangement structure 71 of the motorcycle 1 according to the present embodiment may cause the foreign matter such as dust and sand to fall into the drive pulley 76 even if foreign matter such as dust or sand falls from the space under the seat 35. Therefore, it is easy to ensure the controllability of the exhaust valve 72, and the burden of maintenance and maintenance can be reduced.

  Furthermore, the exhaust valve actuator arrangement structure 71 of the motorcycle 1 according to the present embodiment concentrates the vehicle weight and arranges the motorcycle 73 by partially overlapping the rear cushion unit 32 with the rear cushion unit 32 in a side view of the motorcycle. Improve the ease of handling. Further, the exhaust valve actuator arrangement structure 71 of the motorcycle 1 according to the present embodiment is arranged from the drive pulley 76 to the center frame 13 by arranging the actuator 73 partially overlapping the rear cushion unit 32 in a side view of the vehicle. The separation distance can be shortened, the length of the cable 77 from the drive pulley 76 to the clamp 88 of the center frame 13 can be shortened, and slack can be kept small. Furthermore, the exhaust valve actuator arrangement structure 71 of the motorcycle 1 according to the present embodiment can shorten the length of the cable 77 from the drive pulley 76 to the clamp 88 of the center frame 13 and can suppress the slack. The amount of rocking of the cable 77 can also be suppressed, and in particular, it can be arranged closer to the rear cushion unit 32 provided side by side, which can contribute to securing installation space for other mounted products and reducing the width of the vehicle. .

  Therefore, according to the exhaust valve actuator arrangement structure 71 of the motorcycle 1 according to the present invention, the sliding resistance between the cable 77 and the sheath 87 in the routing path of the cable 77 that transmits the driving force from the actuator 73 to the exhaust valve 72. This can be improved from the viewpoint of suppressing the vehicle width, and the expansion of the width dimension of the vehicle can be suppressed.

DESCRIPTION OF SYMBOLS 1 Motorcycle 2 Body frame 3 V-type engine 5 Steering mechanism 6 Front wheel 7 Rear wheel suspension device 9 Rear wheel 11 Head pipe 12 Main frame 13 Center frame 13a Right center frame 15 Seat frame 15a Right seat frame 16 Pivot 18 Front cylinder 19 Rear cylinder 21 Exhaust pipe 22 Front exhaust pipe 23 Rear exhaust pipe 25 Exhaust muffler 26 Steering head 27 Front fork 28 Front fender 29 Handle 31 Swing arm 32 Rear cushion unit 33 Fuel tank 34 Link mechanism 35 Seat 36 Frame cover 37 Rear fender 38 Cowling 42 Collecting pipe 45 Chamber 51 Crankcase 52 Oil pan 53 Oil filter 55 Cylinder body 56 Cylinder head 57 Head cover 59 U Shape bent portion 71 Exhaust valve actuator arrangement structure 72 Exhaust valve 73 Actuator 75 Output shaft 76 Driving pulley 77 Cable 78 Upper frame 79 Lower frame 80 Auxiliary frame 81 Bridge 82 ABS unit 83 Secondary battery 85 Valve box 86 Driven pulley 87 Sheath 88 Clamp

Claims (4)

A pair of left and right seat frames provided at the rear of the body frame and extending rearward of the vehicle;
A bridge extending between the left and right seat frames and extending in the left-right direction of the vehicle;
An exhaust pipe for guiding exhaust of an engine mounted on the vehicle body frame to the rear of the vehicle;
An exhaust valve provided in the exhaust pipe for adjusting an exhaust flow rate of the engine;
An actuator fixed to the bridge and generating an opening / closing driving force of the exhaust valve;
A drive pulley provided on an output shaft of the actuator and having a rotation surface substantially parallel to a lower edge of the seat frame;
A cable for transmitting a driving force from the driving pulley to the exhaust valve ,
The actuator is provided on a lower surface of the bridge and is disposed between the left and right seat frames,
An output shaft that transmits the opening / closing driving force of the exhaust valve to the driving pulley protrudes from the bottom surface of the actuator,
The drive pulley is fixed to the output shaft and faces the bottom surface of the actuator,
The rotation surface of the drive pulley is orthogonal to the output shaft and is disposed substantially parallel to the bottom surface of the actuator,
The cable is an exhaust valve actuator arrangement structure for a motorcycle that is routed along a rotation surface of the drive pulley . The vehicle body frame is integrally connected to a head pipe, a pair of left and right main frames that extend in the width direction of the vehicle immediately after the head pipe and extends obliquely backward and downward, and a rear end portion of the main frame. A pair of left and right center frames extending toward the rear and the pair of left and right seat frames extending obliquely rearward and upward from the rear end of the main frame,
The cable is directed along one of the center frames substantially along the rotation surface of the drive pulley, hangs down along one of the center frames, curves from one of the center frames toward the rear of the vehicle, 2. The exhaust valve actuator arrangement structure for a motorcycle according to claim 1, wherein the exhaust valve actuator is extended to the rear, approaches the exhaust pipe, is connected to a driven pulley of the exhaust valve, and is fixed with a clamp along one of the center frames. . A V-type engine fixed to the body frame;
A rear cushion unit that is disposed substantially in the center in the longitudinal direction of the vehicle and cushions the body frame and the swing arm,
The V-type engine includes a crankcase, a front cylinder extending obliquely upward from the front upper portion of the crankcase, and a rear cylinder extending obliquely rearward and upward from immediately behind the front cylinder,
The exhaust pipe has a front exhaust pipe portion connected to the exhaust port of the front cylinder, and a rear exhaust pipe portion connected to the exhaust port of the rear cylinder,
The rear exhaust pipe portion extends rearward of the vehicle from the exhaust port of the rear cylinder, moves away from the engine, and is aligned with the rear cushion unit at a position reaching the side of the rear cushion unit,
The exhaust valve actuator arrangement structure of a motorcycle according to claim 1 or 2, wherein the actuator has a portion arranged behind the rear exhaust pipe portion and overlapping the rear cushion unit in a side view of the vehicle. An ABS unit disposed above the actuator;
A secondary battery having a bottom surface facing the actuator,
The actuator is provided on a lower surface of the bridge, has a flat rectangular parallelepiped shape, and a top surface having a large area is directed to the ABS unit, and a bottom surface having an equivalent area to be a pair of the top surfaces is disposed under the seat frame. The exhaust valve actuator arrangement structure for a motorcycle according to any one of claims 1 to 3, wherein the exhaust valve actuator is arranged along an edge.

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