JP2009101893A - Intake device for scooter-type vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To set a seat lower even if an air cleaner exists under the seat. <P>SOLUTION: This intake device 44 is provided for a scooter-type motorcycle 10 which has an engine 32 and a power transmission device 38 provided integrally with each other in a space under the seat, the power transmission device pivotally supporting a rear wheel supporting power unit 39 on a vehicle body frame 12 rockingly in a vehicle vertical direction, and the air cleaner 45 formed as part of the intake device 44 and rockingly provided integrally with a power unit. The vehicle body frame has a pair of seat frames 22 arranged at a predetermined distance apart from each other in a vehicle cross direction for supporting the seat. The air cleaner 45 is arranged under the seat between the pair of seat frames 22. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an intake device for a scooter type vehicle, and more particularly to an intake device for a scooter type motorcycle.

  The scooter type motorcycle described in Patent Document 1 includes a rear cowl that covers the rear portion of the wheel from the side, and the rear end of the rear cowl is disposed rearward of the rear wheel, and an article storage chamber between the seat and the rear wheel. Is disposed, and an air cleaner is disposed below the article storage chamber.

  In the scooter type motorcycle described above, the engine and the power transmission device are integrated, and a power unit (unit swing engine) having a rear wheel supported by the power transmission device is pivotally supported by the vehicle body frame. The air cleaner is disposed above. This air cleaner is long in the vehicle width direction (left-right direction) and is longer to the left and right than the body frame, and both ends of the air cleaner protrude from the left and right sides of the rear wheel, and the left side of the air cleaner is positioned above the power transmission device. Yes.

  In addition, the scooter type motorcycle described in Patent Document 2 discloses an air cleaner integrated with a fender portion of a rear wheel. Also in this motorcycle, an article storage body is arranged below the seat.

Further, in the scooter type motorcycle described in Patent Document 3, a unit swing engine is suspended from a vehicle body frame via left and right links arranged in the vehicle width direction, and the left and right link arms are connected to each other. What is connected by a pipe is disclosed. And the contube which comprises an intake passage is arrange | positioned and penetrated in the space obtained by bending the center part of this connection pipe upwards in a semicircle shape.
JP 2006-111086 A JP-A-6-117338 JP-A-3-213482

  However, in the scooter type motorcycle described in Patent Document 1, since the air cleaner swings together with the engine, the body frame is disposed above the air cleaner by an amount of swinging of the rear wheel in order to avoid interference between the air cleaner and the body frame. Only provided with clearance. Since the seat is placed above the body frame, the seat becomes high in such a configuration, and it is difficult to set the seat height low.

  Further, in the scooter type motorcycle described in Patent Document 2, an article storage body is provided below the seat, and the height dimension of the article storage body must be set large in order to secure capacity. Further, in order to avoid interference with the air cleaner, the article storage body must be arranged at a high position. For these reasons, the position of the sheet located above the article storage body becomes high.

  Furthermore, in the scooter type motorcycle described in Patent Document 2, the vehicle body frame provided with the article storage body has a monocoque structure, does not include a pair of seat frames in the vehicle width direction, and an air cleaner is provided between the two seat frames. There is no idea of storing. In the first place, the article storage body and the air cleaner do not overlap in a side view.

  Further, in the scooter type motorcycle described in Patent Document 3, since the intake passage is disposed below the connecting pipe, the intake passage is bent or the curvature of the intake passage is reduced, and the intake resistance is increased. As a result, the combustion efficiency of the engine is reduced. Further, since the connecting pipe is bent, the torsional rigidity of the connecting pipe may be reduced.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an intake device for a scooter type vehicle that can set the seat height low even when an air cleaner exists below the seat.

  Another object of the present invention is to provide an intake device for a scooter type vehicle that can reduce intake resistance and improve combustion efficiency.

  In the present invention, an engine and a power transmission device are integrated in a space below the seat, and the power transmission device pivotally supports a power unit that supports a rear wheel on a vehicle body frame so as to be swingable in a vehicle height direction. In the scooter-type vehicle air intake device in which the air cleaner that constitutes the swing unit is provided integrally with the power unit, the body frame includes a pair of seat frames arranged at a predetermined distance in the vehicle width direction to support the seat. The air cleaner is disposed between the pair of seat frames below the seat.

  According to the present invention, even if the air cleaner swings in the vehicle height direction together with the power unit, it does not interfere with the seat frame. Therefore, even when the air cleaner exists below the seat, the vehicle body frame can be disposed at a low position. As a result, the seat height can be set low.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is an overall left side view showing a scooter type motorcycle to which an embodiment of an intake device for a scooter type vehicle according to the present invention is applied. FIG. 2 is an overall plan view of the scooter type motorcycle of FIG. FIG. 3 is a left side view of the scooter type motorcycle shown in FIG. FIG. 4 is a right side view of the scooter type motorcycle shown in FIG.

  The scooter type motorcycle 10 as the scooter type vehicle shown in FIGS. 1 and 2 is configured by covering a vehicle body frame 11 and the like shown in FIGS. 3 and 4 with a vehicle body cover 12. Here, the scooter type motorcycle 10 has a leg shield 14 that protects the front of the legs of the occupant seated on the seat 13 in front of the seat 13 when compared to other motorcycles, It is a motorcycle characterized by having a flat foot board 15 for placing a foot portion of an occupant seated on the seat 13 below, and a point where the front of the seat 13 is formed lower than the seat 13. is there.

  As shown in FIGS. 3 and 4, the vehicle body frame 11 in such a scooter type motorcycle 10 includes a head pipe 16 at the front end, a front upper frame 17, an upper frame 18, a front lower frame 19, and a lower frame. 20, a bridge frame 21, a seat frame 22, and a footboard frame 23.

  The front upper frame 17 extends from the upper part of the head pipe 16 in a rearward and downward direction, and is provided in a pair in the vehicle width direction. A pair of upper frames 18 are provided in the vehicle width direction and extend in the vehicle front-rear direction, and the lower end of the front upper frame 17 is joined to the front portion.

  The front lower frame 19 extends from the lower portion of the head pipe 16 to the lower rear side in an inclined manner substantially in parallel with the front upper frame 17, and a pair of front lower frames 19 are provided in the vehicle width direction and are joined to the pair of upper frames 18. The lower frame 20 is joined to the lower portion of the upper frame 18 in the vicinity of the joining position of the front lower frame 19, extends obliquely backward and downward, and then slopes backward and upward, and is provided in a pair in the vehicle width direction.

  The bridge frame 21 is formed in a U-shape when viewed from the front of the vehicle, and both upper ends thereof are joined to approximately the center position of the pair of upper frames 18 in the vehicle front-rear direction. A reinforcing member extending in the vehicle width direction is joined. A total of two seat frames 22, one each, are installed between a substantially center position in the vehicle height direction on both sides of the bridge frame 21 in the vehicle width direction and the rear end portions of the pair of upper frames 18.

  The footboard frame 23 is disposed on the outer side of each of the pair of lower frames 20. The front end portion is formed by being bent obliquely upward, joined to the front end portion of the upper frame 18, and the other portion is horizontally bridged. It extends to position 21 and is fixed to the lower frame 20.

  A front fork 25 (FIG. 1) that supports the front wheel 24 is pivotally supported by the head pipe 16 of the vehicle body frame 11 described above, and a handle bar 26 is connected to the upper end portion of the front fork 25 in an integrated manner. . By operating the handle bar 26, the front wheel 24 is steered so as to be rotatable in the vehicle width direction.

  An article storage box 27 and a fuel tank 28 are disposed in a center tunnel portion 76 described later, which is a space surrounded by the pair of front upper frame 17, upper frame 18, front lower frame 19, and lower frame 20. Is done. A radiator 29 is disposed below the front lower frame 19 and supported by the front end portion of the upper frame 18. The fuel tank 28 is supported by a fuel tank bracket 20 </ b> A attached to the lower frame 20.

  A suspension bracket 30 is fixed to the upper frame 18 and the seat frame 22 at the intersection position of the upper frame 18 and the seat frame 22. An engine 32 having a forward tilt cylinder is pivotally supported by the suspension bracket 30 and the seat frame 22 via a link plate 31 so as to be swingable in the vehicle height direction around the engine swing shaft 33. The engine 32 is a water-cooled four-cycle single cylinder engine, for example, and is cooled by cooling water from the radiator 29.

  In the engine 32, a cylinder block 35, a cylinder head 36, and a head cover 37 are sequentially installed at the front portion of the crankcase 34 (FIG. 4), and the cylinder block 35, the cylinder head 36, etc. are substantially horizontal with respect to the crankcase 34. Inclined forward until The engine swing shaft 33 is disposed at the front upper part of the crankcase 34. The engine 32 forms a power unit (also referred to as a unit swing engine) 39 by integrating a power transmission device 38 on one side (for example, the left side) of the crankcase 34 in the vehicle width direction. A rear wheel 40 is rotatably supported on the rear portion of the power transmission device 38 via a rear wheel shaft.

  Further, the engine 32 has a front lower portion of the crankcase 34 connected to a lower end of the rear cushion unit 42 via a link lever mechanism 41 shown in FIG. The rear cushion unit 42 is arranged such that its longitudinal direction is substantially parallel to the vehicle height direction, and its upper end is supported by the reinforcing member of the bridge frame 21. The rear cushion unit 42 cushions the swing of the power unit 39 and the rear wheel 40 in the vehicle height direction.

  The rear cushion unit 42 is disposed between the head cover 37 of the engine 32 and the fuel tank 28 in a vehicle side view. In this case, since the fuel injection pipe 43 connected to the fuel tank 28 extends obliquely rearward and upward from the fuel tank 28 toward the other side (for example, the right side) in the vehicle width direction, the rear cushion unit 42 includes the fuel injection pipe 43. It is arranged to be biased to one side (for example, the left side) in the vehicle width direction that is the opposite side. Accordingly, the link lever mechanism 41 is also positioned below the cylinder block 35 and the cylinder head 36 of the engine 32, but is biased to one side (for example, the left side) of the crankcase 34 in the vehicle width direction.

  An intake device 44 is connected to an upper surface of the cylinder head 36 in the engine 32 so as to communicate with an intake port (not shown) of the cylinder head 36. The intake device 44 is disposed above the engine 32. Among these, the air cleaner 45 which comprises the intake device 44 is arrange | positioned between a pair of seat frames 22 above the crankcase 34, as shown in FIG. The air cleaner 45 is fixedly attached to the engine 32 and is provided so as to be able to swing integrally with the engine 32 together with the other intake devices 44.

  An exhaust pipe 46 is connected to the lower surface of the cylinder head 36 in the engine 32 so as to communicate with an exhaust port (not shown) of the cylinder head 36. The exhaust pipe 46 is curvedly extended downward from the cylinder head 36 on the other side (for example, the right side) in the vehicle width direction opposite to the link lever mechanism 41, and extends backward through the lower side of the crankcase 34. Then, the exhaust muffler 47 is connected. The exhaust muffler 47 is disposed on the opposite side (for example, the right side) of the power transmission device 38 in the vehicle width direction with the rear wheel 40 interposed therebetween, and is attached to the muffler transaction bracket 48. The muffler transaction bracket 48 is swingably connected to the right rear portion of the crankcase 34 of the engine 32 using a swing arm 49. Thereby, the exhaust muffler 47 is provided so as to be able to swing together with the engine 32 together with the exhaust pipe 46.

  As shown in FIGS. 1 and 3, the vehicle body cover 12 includes a vehicle body frame 11, an article storage box 27 provided on the vehicle body frame 11, a fuel tank 28, a radiator 29, an engine 32, a rear cushion unit 42, an intake air It covers components such as the device 44 and the exhaust pipe 46 that are present in the area below the front of the seat 13. Here, the seat 13 is supported by the rear half of the upper frame 18 and the seat frame 22 in the vehicle body frame 11, and is a seat in which a front rider seat 13A and a rear tandem seat 13B are integrated. Since the above-described article storage box 27 does not exist in the space below the seat 13, the seating surfaces of the rider seat 13A and the tandem seat 13B have no large step.

  The vehicle body cover 12 includes a front cover 50 that covers the front portion of the head pipe 16 and the upper portion of the front fork 25, an inner cover 51 that is connected to the rear edge of the front cover 50, and a rear edge of the inner cover 51. A pair of center covers 52 arranged in the vehicle width direction, a pair of rear covers 53 arranged in a vehicle width direction connected to the lower edge of the center cover 52, and a rear edge of the center cover 52 and a rear upper edge of the rear cover 53. A pair of rear cowls 54 connected in the vehicle width direction, a tail cover 55 connected to the rear edge of the rear cowls 54, and a pair of flat plate shapes in the vehicle width direction connected to the lower edge of the rear cover 53. The footboard 15, a pair of undercovers 56 in the vehicle width direction that are connected to the lower outer edges of these footboards 15, and the lower edges of these undercovers 56 Constructed and a bottom cover 57 for covering the.

  The inner cover 51 covers the rear part of the head pipe 16, the upper part of the front fork 25, the front parts of the front upper frame 17 and the front lower frame 19, and the radiator 29. The both sides of the front cover 50 and the inner cover 51 that are combined and integrated constitute the leg shield 14. The lower rear surface 74 of the leg shield 14 is connected to the front edge of the foot board 15. The lower portions of the front cover 50 and the inner cover 51 cover the radiator 29.

  The center cover 52 covers the rear portions of the front upper frame 17 and the front lower frame 19, the upper frame 18, the front portions of the lower frame 20, the article storage box 27, and the like. The rear cover 53 covers the bridge frame 21, the seat frame 22, the upper part of the fuel tank 28, the rear cushion unit 42, and the engine 32.

  The rear cowl 54 covers the upper end portion of the seat frame 22 and the air cleaner 45. The footboard 15 covers the footboard frame 23 excluding the front end portion, and is supported by the footboard frame 23. Further, the under cover 56 covers the lower portion of the lower frame 20, the lower end portion of the bridge frame 21, the lower portion of the fuel tank 28, the link lever mechanism 41, the exhaust pipe 46, and the like.

  A front fender 58 that covers the upper portion of the front wheel 24 and a handle cover 59 that covers the handle bar 26 are attached to the front fork 25 so as to rotate together. The upper part of the rear wheel 40 is covered by a rear fender 60, the power transmission device 38 is covered by an outer cover 61, and the exhaust muffler 47 is covered by a muffler cover 62 (FIG. 4).

  As shown in FIGS. 1 and 3, a side stand 63 is disposed on one side (for example, the left side) in the vehicle width direction at the position where the under cover 56 is disposed. The side stand 63 is pivotally supported by using a side stand bracket 64 fixed to the lower frame 20 on one side (for example, the left side) in the vehicle width direction. Similarly, a center stand 65 is disposed behind the side stand 63 at the position where the under cover 56 is disposed. The center stand 65 is pivotally supported using a center stand bracket 66 fixed to the bottom of the bridge frame 21 as a pair.

  A headlight 67 is installed on the front cover 50, and a vehicle width lamp 68 and a direction indicator lamp 69 are disposed close to both sides of the headlight 67. In addition, a brake lamp 70 is installed on the tail cover 55, and a vehicle width lamp 71 and a direction indicator lamp 72 are arranged close to the pair of rear cowls 54 on both sides of the brake lamp 70, respectively. Reference numeral 73 denotes a grab bar.

  As shown in FIGS. 1, 5, and 6, in the inner cover 51, the center cover 52, and the rear cover 53, the region from the lower side of the substantially front end 75 of the seat 13 to the lower part of the front inner cover 51 is A center tunnel portion 76 is formed by bulging upward between the pair of footboards 15 in the vehicle width direction and between the lower rear surfaces 74 of both leg shields 14 continuous with the front ends of the footboards 15. In the center tunnel portion 76, the article storage box 27 is disposed on the front side, and the fuel tank 28 is disposed on the rear side. The fuel tank 28 is disposed in a range between a rear side of the center tunnel portion 76 and a space between the pair of under covers 56 communicating with the rear side.

  As shown in FIGS. 3 and 4, the fuel tank 28 has a rear portion 28 </ b> A that bulges upward, a rear portion 28 </ b> A is formed in a substantially trapezoidal shape in a side view, and extends from the front end of the fuel tank 28 to the rear portion 28 </ b> A. The upper surface of the portion is inclined forward and downward, and a large mutual capacity is ensured while avoiding interference with the rear portion 82B of the bottom surface 82 of the article storage box 27. The fuel injection pipe 43 is connected to the upper part of the rear part 28A. 4 and 6, as described above, the fuel injection pipe 43 extends obliquely rearward and upward toward the other side (for example, the right side) in the vehicle width direction, and is attached to the tip of the fuel injection pipe 43. A fuel supply port 77 is formed. As shown in FIG. 7, the fuel supply port 77 is provided substantially below the front end 75 of the seat 13 on the other side of the pair of center covers 52 in the vehicle width direction, for example, on the right center cover 52. A fuel lid 78 (FIG. 2) that covers the fuel supply port 77 is disposed in the right center cover 52.

  In this scooter type motorcycle 10, as shown in FIGS. 1 and 6, a side stand 63 is disposed on the side opposite to the side where the fuel supply port 77 and the fuel lid 78 are provided, for example, on the left cover 56. . The side stand 63 is pivotally supported by the lower frame 20 as described above.

  Similarly, as shown in FIG. 5, the rear wheel 40 is fixed to the center cover 52 on the opposite side to the side where the fuel supply port 77 and the fuel lid 78 shown in FIG. A brake operation lever, that is, a parking brake lever 79 is disposed. The parking brake lever 79 is provided at a position below the substantially front end 75 of the seat 13 in the left center cover 52. Therefore, the parking brake lever 79 is parked by using the side stand 63, and is positioned at a low position when the scooter type motorcycle 10 is inclined close to the ground or the floor surface 80 (FIG. 6). On the contrary, the fuel supply port 77 and the fuel lid 78 are positioned at a high position.

  As shown in FIGS. 3 and 5, the article storage box 27 is configured to store articles such as a helmet 81. The rear portion 82B of the bottom surface 82 of the article storage box 27 is formed to be inclined rearward and upward together with the upper surface of the fuel tank 28. The article storage box 27 and the fuel tank 28 are arranged close to each other so that the rear portion 82B of the bottom surface 82 of the article storage box 27 and the upper surface of the fuel tank 28 overlap in the vehicle front-rear direction in plan view. Further, the front portion 82 </ b> A of the bottom surface 82 of the article storage box 27 is formed to be inclined forward and upward along the front lower frame 19. As a result, the bottom surface 82 of the article storage box 27 is configured such that the boundary portion between the front portion 82A and the rear portion 82B is formed deepest, and the helmet 81 can be stored with its top portion 81A facing forward and downward.

  Further, the radiator 29 is disposed below the front portion 82 </ b> A of the bottom surface 82 in the article storage box 27. As a result, an air guide path through which traveling wind is guided from the front portion 82 </ b> A of the bottom surface 82 toward the radiator 29 is configured.

  As shown in FIGS. 8 to 10, the article storage box 27 includes an opening / closing lid 84 that opens and closes an opening 83 at the top thereof. As shown in FIGS. 5 and 10, the opening / closing lid 84 is pivotally supported using a rotation shaft 85, and the rotation shaft 85 is one side (one side in the vehicle width direction) ( For example, at the edge of the left side), it is tilted forward and upward. That is, the rotation shaft 85 is installed on the same side as the side stand 63 in the vehicle width direction. As shown in FIG. 9, the turning trajectory of the front edge 84 </ b> A of the opening / closing lid 84 that rotates about the rotating shaft 85 is a trajectory that rotates in the vehicle width direction along the rear surface 86 of the upper portion of the inner cover 51. It has become.

  Next, the engine suspension structure will be described in detail with reference to FIGS. The front ends of the link plates 31 arranged in a pair in the vehicle width direction support the engine-side suspension 88 of the engine 32, and the base ends of the first vehicle-side suspension 89 and the second vehicle-side suspension 90 of the vehicle body frame 11. Attached to. Therefore, the engine-side suspension 88, the first vehicle body-side suspension 89, and the second vehicle-body suspension 90 are connected by the link plate 31. The pair of link plates 31 are integrally connected by a connecting bar 91 disposed on the first vehicle body side suspension portion 89 and the second vehicle body side suspension portion 90 side.

  The first vehicle body side suspension portion 89 is provided on the seat frame 22 of the vehicle body frame 11, and each link plate 31 is fixedly attached to the seat frame 22. The second vehicle body side suspension portion 90 is provided on a suspension bracket 30 that forms a part of the vehicle body frame 11, and each link plate 31 is fixedly attached to the suspension bracket 30 via an elastic body such as rubber so as to be capable of vibration isolation. It is done. The suspension bracket 30 is provided so as to straddle the upper frame 18 and the seat frame 22. The engine-side suspension 88 includes an engine swing shaft 33 that is inserted into the crankcase 34 of the engine 32, and the engine swing shaft 33 is supported at the tip of each link plate 31. The engine swing shaft 33 is provided at the upper front portion of the crankcase 34.

  Therefore, the engine 32 (and hence the power unit 39) is driven by the engine side suspension part 88, the first vehicle body side suspension part 89, the second vehicle body side suspension part 90, and the link plate 31 so that the engine It is pivotally supported so as to be swingable in the vertical direction, and is suspended from the body frame 11.

  A pair of seat frames 22 are arranged at a predetermined distance in the vehicle width direction, and support the seat 13 together with the rear half of the upper frame 18. In addition, the engine 32 includes a cylinder portion 92 including a cylinder block 35, a cylinder head 36, and a head cover 37 that is inclined forward from the front portion of the crankcase 34 to constitute a forward tilt cylinder. As a result, a concave region 93 (FIG. 13) is formed above the cylinder portion 92 and the crankcase 34.

  As shown in FIGS. 11 and 12, an air cleaner 45 is disposed between the pair of seat frames 22 below the seat 13. The air cleaner 45 is further disposed in the concave region 93, particularly above the crankcase 34, and a main portion 45A (a portion having a relatively large volume in front of the air cleaner 45) is located above the engine-side suspension portion 88. For example, it is positioned substantially immediately above. Accordingly, the air cleaner 45 is set so that at least a part thereof always overlaps the seat frame 22 in a side view.

  3 and 11, the air cleaner 45 is disposed in front of the rear wheel 40, and the bottom surface 45B of the air cleaner 45 is positioned lower than the upper portion of the rear wheel 40 in a side view. . Further, a central portion in the vehicle width direction at the rear end of the bottom surface 45 </ b> B of the air cleaner 45 is formed as a curved surface that protrudes inward to bypass the rear fender 60.

  As shown in FIGS. 11 and 12, an intake passage extends from the air cleaner 45 toward the cylinder head 36 of the engine 32, and as this intake passage, a throttle body 95 and an intake pipe 94 are sequentially arranged from the air cleaner 45 side. A fuel injector 96 is attached to the intake pipe 94, and the fuel injector 96 and the throttle body 95 constitute a fuel supply device. The air cleaner 45, the throttle body 95, the fuel injector 96, and the intake pipe 94 constitute the intake device 44.

  The air cleaner 45 is fixedly attached to the crankcase 34 via an air cleaner attachment bracket 107 (FIGS. 11 and 13) attached to the crankcase 34. Therefore, the intake device 44 including the air cleaner 45 is configured to swing and be integrated with the power unit 39.

  The intake passage of the intake device 44 is formed in a substantially curved manner around the connection bar 91 above the connection bar 91 of the link plate 31 in a side view. Accordingly, the fuel injector 96 disposed in the intake pipe 94 constituting the intake passage is also disposed above the connecting bar 91, and a fuel pipe (not shown) connected to the fuel injector 96 contacts the connecting bar 91. Is avoided.

  Next, the above-described footboard 15 and exhaust pipe 46 will be described in detail with reference to FIG. 2, FIG. 5, FIG. 16, FIG. As shown in FIGS. 2 and 5, a pair of footboards 15 on which the feet of a passenger seated on the seat 13 are placed are arranged below the seat 13 in the vehicle width direction. The pair of footboards 15 are configured to have different lengths in the vehicle front-rear direction.

  That is, an exhaust muffler 47 is disposed behind the foot board 15 on one side (for example, the right side) as shown in FIG. 16, and the rear end 97 of the foot board 15 is attached to the exhaust muffler 47 and the exhaust muffler. The muffler cover 62 is extended to a position close to both front ends. A power transmission device 38 is disposed behind the footboard 15 on the other side (for example, the left side). The rear end 98 of the footboard 15 is attached to the power transmission device 38 and the power transmission device 38. The outer cover 61 extends to both front ends, or extends to a position close to both front ends. Further, an under cover 56 provided continuously with the foot board 15 is also extended in the vicinity of the exhaust muffler 47 and the front end of the power transmission device 38.

  As shown in FIGS. 5 and 17, the pair of footboards 15 are formed in a flat shape having no step in the vehicle height direction from the vehicle front side to the rear side. That is, each of the pair of footboards 15 places the feet of the tandem rider (same trader) sitting on the tandem seat 13B as well as the region where the rider (driver) sitting on the rider seat 13A is placed. The area to be set is also set to the same height. As shown in FIG. 16, a cutout portion 99 for operating the side stand 63 and a cutout portion 100 for bypassing the center stand 65 are provided at the outer edge portion of the footboard 15 on the power transmission device 38 side (for example, the left side). Are formed respectively.

  As shown in FIGS. 14 to 17, as described above, the exhaust pipe 46 extends from the cylinder head 36 of the engine 32 so as to curve downward on the exhaust muffler 47 side (for example, the right side) that is one side in the vehicle width direction. The exhaust muffler 47 is connected to the exhaust muffler 47 through the lower side of the side part 101 on the exhaust muffler 47 side (for example, the right side) which is one side of the case 34. The power transmission device 38 is integrated with the side portion 102 on the power transmission device 38 side (for example, the left side) which is the other side of the crankcase 34.

As shown in FIGS. 11, 15, and 16, the above-described exhaust pipe 46 is located in front of the side portion 101 of the crankcase 34 on the exhaust muffler 47 side (for example, the right side), and the lower space of the cylinder portion 92. An exhaust sensor 103 such as an O ₂ sensor is attached using a boss 104 at a position facing 105. Further, the exhaust sensor 103 is provided on the exhaust pipe 46 so as to project obliquely upward toward the inner side in the vehicle width direction.

  With the configuration as described above, according to the present embodiment, the following effects (1) to (20) are obtained.

  (1) Since the air cleaner 45 is disposed between the pair of seat frames 22 in the vehicle width direction below the seat 13 as shown in FIGS. 11 and 12, the power cleaner 39 and the rear wheel 40 together with the power unit 39 in the vehicle height direction. Even if it is swung, it does not interfere with the seat frame 22. For this reason, even when the air cleaner 45 exists below the seat 13, the vehicle body frame 11 (particularly, the upper frame 18 and the seat frame 22) can be disposed at a low position, and as a result, the height of the seat 13 can be set low.

  (2) The air cleaner 45 is disposed above the crankcase 34, and its main part 45A is provided on the front upper part of the crankcase 34 and is an engine-side suspension part 88 (engine swinging) serving as the swing center of the power unit 39. Since it is positioned above the shaft 33), the amount of displacement of the air cleaner 45 in the vehicle height direction can be reduced. As a result, the clearance secured to avoid interference between the upper surface of the air cleaner 45 and the sheet 13 can be set small, and the height of the sheet 13 can be set low from this point as well.

  (3) As shown in FIGS. 3 and 11, the air cleaner 45 is disposed in front of the rear wheel 40, and the bottom surface 45B of the air cleaner 45 is set at a position lower than the upper portion of the rear wheel 40 in a side view. In addition, the air cleaner 45 is swingably integrated with the power unit 39 and the rear wheel 40. As a result, the air cleaner 45 can be disposed at a low position while preventing the air cleaner 45 and the rear wheel 40 from interfering with each other, so that the height of the seat 13 can be set low.

  In this case, since the air cleaner 45 is disposed in the concave region 93 above the cylinder portion 92 and the crankcase 34 of the engine 32 having the cylinder tilted forward to a substantially horizontal state, the air cleaner 45 is disposed at the vehicle height. The direction can be set to be lower, and as a result, the height of the sheet 13 can be set to be lower.

  (4) As shown in FIGS. 11, 12 and 14, since the intake passage is arranged substantially curved above the connecting bar 91 that integrally connects the pair of link plates 31, the curvature of the intake passage Can be set large, and intake resistance can be reduced. As a result, the combustion efficiency of the engine 32 can be increased, and both the output and fuel consumption can be improved.

  (5) Since the fuel injector 96 of the intake device 44 is disposed above the connecting bar 91 of the link plate 31, the fuel pipe connected to the fuel injector 96 is also disposed above the connecting bar 91. Therefore, even when the intake device 44 swings together with the power unit 39 and the rear wheel 40, the fuel pipe can be prevented from coming into contact with the connecting bar 91 and being damaged.

  (6) As shown in FIGS. 2 and 16, the footboards 15 arranged in a pair in the vehicle width direction have different lengths in the vehicle front-rear direction, and thus are formed to an unnecessary length. There is no. Therefore, the metal footboard frame 23 that supports these footboards 15 is not formed to an unnecessarily long length, so that the weight of the scooter type motorcycle 10 can be reduced. Further, when the footboard 15 is lengthened, it is necessary to increase the strength of the footboard 15, but since the footboard 15 is not unnecessarily lengthened, the strength of the footboard 15 is increased more than necessary. It does not have to be increased.

  (7) The rear end 97 of the footboard 15 on the exhaust muffler 47 side (for example, the right side) is disposed close to the front end of the exhaust muffler 47, and the rear end 98 of the footboard on the side of the power transmission device 38 (for example, the left side) is powered. Since it is disposed at or near the front end of the transmission device 38, a continuous design can be realized by the foot board 15, the exhaust muffler 47, and the power transmission device 38.

  Further, as shown in FIG. 17, since the gap 106 between the footboard 15 on the exhaust muffler 47 side and the exhaust muffler 47 can be set small, a stepping stone enters the gap 106 and the exhaust muffler 47 and the exhaust pipe 46 are damaged. Can be prevented.

  (8) Since each of the pair of footboards 15 is formed in a flat shape having no step from the front side to the rear side of the vehicle, as shown in FIG. 1, the rider (driver) and the tandem rider (same trader) ) Is the same height. As a result, the degree of freedom of the tandem rider's footrest position can be expanded and the comfort performance can be improved, the sense of unity between the rider and the tandem rider when riding can be improved, and the running stability can be improved. The vehicle stability when the tandem rider gets on and off can also be improved.

  (9) As shown in FIG. 16, the exhaust pipe 46 extending rearward from the engine 32 and connected to the exhaust muffler 47 is connected to the side portion 101 on the exhaust muffler 47 side (for example, the right side) of the crankcase 34 of the engine 32. Therefore, the exhaust pipe 46 and the exhaust muffler 47 can be arranged on the inner side in the vehicle width direction. Accordingly, the rear end 97 of the footboard 15 on the exhaust muffler 47 side (for example, the right side) can be extended rearward without projecting outward in the vehicle width direction, and the footboard 15 has a flat shape. Can be configured.

  (10) Since the exhaust sensor 103 is attached to the exhaust pipe 46 at a position ahead of the side portion 101 of the crankcase 34 on the exhaust muffler 47 side (for example, the right side), the footboard 15 on the exhaust muffler 47 side is attached. The rear end 97 can be extended rearward without projecting in the vehicle width direction or disposed at a high position, and can contribute to the flattening of the footboard 15.

  In addition, as shown in FIG. 11, the exhaust sensor 103 protrudes from the exhaust pipe 46 toward the inner side in the vehicle width direction in the lower space 105 of the cylinder portion 92, for example, when the vehicle body cover 12 is missing. Even damage is prevented and protected.

  (11) As shown in FIGS. 5 and 7, the fuel tank 28 is formed in the inner cover 51, the center cover 52, and the rear cover 53 in a region extending from the lower part of the inner cover 51 to the lower part of the front end 75 of the seat 13. The fuel supply port 77 at the front end of the fuel injection pipe 43 that is disposed on the rear side in the center tunnel portion 76 that extends from the fuel tank 28 is positioned below the substantially front end portion 75 of the seat 13. The fuel tank 28 and the fuel supply port 77 are arranged close to each other. Therefore, the length of the fuel injection pipe 43, that is, the fuel supply path from the fuel supply port 77 to the fuel tank 28 can be shortened.

  (12) Since the side stand 63 is provided on the opposite side (for example, the right side) with respect to one side (for example, the left side) in the vehicle width direction in which the fuel supply port 77 is provided, the side stand 63 is provided as shown in FIG. At the time of parking, the fuel supply port 77 is positioned at a high position on the opposite side to the side where the scooter type motorcycle 10 approaches the ground or floor 80 and inclines, and the fuel injection pipe 43 is in a substantially vertical direction. Will be oriented. Thus, the fuel supply port 77 is positioned at a high position, so that the fuel supply operation to the fuel supply port 77 can be facilitated. Further, since the fuel injection pipe 43 is oriented substantially vertically, the head difference between the fuel level 87 (FIG. 6) and the fuel supply port 77 in the fuel tank 28 during fuel supply increases. As a result, fuel leakage from the fuel supply port 77 can be prevented even during fuel oversupply.

  (13) As shown in FIG. 4, the fuel tank 28 has a rear portion 28 </ b> A formed high, and the fuel injection pipe 43 is connected to the upper portion of the rear portion 28 </ b> A. When the fuel is supplied, the air in the fuel tank 28 can be vented well through the fuel injection pipe 43.

  (14) In the center cover 52 on the opposite side (for example, the left side) to the side where the fuel supply port 77 is provided, a parking brake lever 79 is provided below the front end 75 of the seat 13 as shown in FIG. . For this reason, since the distance between the parking brake provided on the rear wheel 40 and the parking brake lever 79 can be shortened, the length of the transmission member (for example, Bowden wire) that transmits the operating force from the parking brake lever 79 to the parking brake is shortened. Can be shortened.

  Further, since the parking brake lever 79 is provided substantially below the front end portion 75 of the seat 13, the operation of the parking brake lever 79 can be performed without greatly changing the riding posture of the passenger, and the parking brake lever 79 can be used even when getting off the vehicle. Is located near the center of gravity of the scooter type motorcycle 10, the parking brake lever 79 can be operated without supporting the motorcycle 10.

  (15) In the inner cover 51, the center cover 52, and the rear cover 53, the article storage box 27 is disposed on the front side in the center tunnel portion 76 formed in a region in front of the lower side of the substantially front end portion 75 of the seat 13. Therefore, the height of the seat 13 can be set low, and the article (for example, the helmet 81) can be easily put in and out of the article storage box 27 while the passenger is seated on the seat 13.

  (16) The rear portion 82B of the bottom surface 82 of the article storage box 27 is formed to be inclined rearward and upward together with the upper surface of the rear portion 28A of the fuel tank 28, and the article storage box 27 and the fuel tank 28 are connected to the rear surface 82B of the bottom surface 82 and the fuel tank. 28, the rear base 28A is disposed close to each other so that the upper surface of the rear part 28A overlaps, so that the wheel base of the scooter type motorcycle 10 can be shortened and set.

  (17) Since the front portion 82A of the bottom surface 82 of the article storage box 27 is formed to be inclined forward and upward along the shape of the front lower frame 19, the article storage box 27 can be disposed close to the front wheel 24, Also from this point, the wheel base of the scooter type motorcycle 10 can be shortened.

  (18) Since the radiator 29 (FIG. 3) is disposed below the front portion 82A of the bottom surface 82 of the article storage box 27 formed to be inclined forward and upward, it travels from the front portion 82A of the bottom surface 82 to the radiator 29. It is possible to form an air guide path that guides the wind well. For this reason, heat exchange by the radiator 29 is ensured, and the engine 32 can be suitably cooled.

  (19) Since the opening / closing lid 84 of the article storage box 27 is pivotally supported by using the rotation shaft 85 provided to be inclined forward and upward, the occupant performs the opening / closing operation of the opening / closing lid 84. It can be easily carried out in a state where the robot is seated on 13.

  (20) As shown in FIG. 5, since the pivot shaft 85 that pivotally supports the opening / closing lid 84 of the article storage box 27 is provided on the same side as the side stand 63 in the vehicle width direction, the scooter type automatic using the side stand 63 When the opening / closing lid 84 is opened when the motorcycle 10 is parked, the opening / closing lid 84 can be prevented from being inadvertently closed by its own weight.

  Further, when the opening / closing lid 84 is operated with the handle bar 26 in the handle lock position (maximum rotation position to the left side) during parking, the opening / closing lid 84 and the handle bar 26 are not in contact with each other. Since the dimension in the width direction and the position of the rotation shaft 85 are set, the operability of the opening / closing lid 84 is improved when the handle is locked, and access to the article storage box 27 is improved.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this. For example, in the present embodiment, the case of a scooter type motorcycle has been described, but a scooter type motorcycle may be used.

1 is an overall left side view showing a scooter type motorcycle to which an embodiment of an intake device for a scooter type vehicle according to the present invention is applied. FIG. 2 is an overall plan view of the scooter type motorcycle of FIG. 1. FIG. 2 is a left side view of the scooter type motorcycle shown in FIG. The right view which abbreviate | omits and shows the vehicle body cover etc. of the scooter type motorcycle of FIG. The partial left view which shows the vehicle front-back direction center part of the scooter type motorcycle of FIG. Sectional drawing which follows the VI-VI line of FIG. The partial right view which shows the vehicle front-back direction center part of the scooter type motorcycle of FIG. FIG. VIII arrow view of FIG. FIG. 6 is a partial left side view showing a state in which the opening / closing lid is opened in the scooter type motorcycle of FIG. 5. X arrow line view of FIG. The partial left view which expands and shows the vehicle rear part of FIG. XII arrow line view of FIG. FIG. 13 is a perspective view showing an air intake apparatus including an air cleaner in FIG. Sectional drawing which follows the XIV-XIV line | wire of FIG. The perspective view which shows the power unit of FIG. FIG. 2 is a plan view showing a positional relationship among a foot board, a power unit, an exhaust muffler, and the like of the scooter type motorcycle of FIG. 1. The partial right view which shows the vehicle rear part of the scooter type motorcycle of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Scooter type motorcycle 11 Body frame 12 Body cover 13 Seat 15 Footboard 19 Front lower frame 27 Goods storage box 28 Fuel tank 28A Fuel tank rear part 29 Radiator 31 Link plate 39 Power unit 40 Rear wheel 43 Fuel injection pipe 44 Intake device 45 Air cleaner 45A Air cleaner main part 45B Air cleaner bottom face 46 Exhaust pipe 47 Exhaust muffler 51 Inner cover 52 Center cover 53 Rear cover 63 Side stand 75 Seat front front part 76 Center tunnel part 77 Fuel supply port 79 Parking brake lever (operating lever for parking brake) )
81 Helmet (article)
81A Helmet top part 82 Bottom of article storage box 82A Bottom front part 82B Bottom rear part 83 Opening part 84 of article storage box Opening / closing lid 85 Rotating shaft 88 Engine side suspension part 89 First vehicle body side suspension part 90 Second vehicle body side Suspension portion 91 Connecting bar 92 Cylinder portion 93 Concave region 94 Intake passage 96 Fuel injector 97, 98 Rear end 101 of footboard Crank case side portion 103 Exhaust sensor 105 Lower space

Claims (6)

An engine and a power transmission device are integrated in a space below the seat, and the power transmission device pivotally supports a power unit that supports the rear wheels on a vehicle body frame so as to be swingable in the vehicle height direction, and constitutes an air intake device. In the intake device of the scooter type vehicle provided integrally with the power unit and swinging,
The vehicle body frame includes a pair of seat frames that are arranged at a predetermined distance in the vehicle width direction and support the seat,
The air cleaner according to claim 1, wherein the air cleaner is disposed between the pair of seat frames below the seat. The engine is provided with an engine-side suspension for pivotally supporting the power unit at the front upper part of the crankcase,
2. The scooter type vehicle intake device according to claim 1, wherein the air cleaner is disposed above the crankcase and a main portion thereof is positioned above the engine-side suspension. In the engine, the cylinder portion is disposed to be inclined forward with respect to the crankcase, and a concave region is formed above the cylinder portion and the crankcase.
The air cleaner for a scooter type vehicle according to claim 1, wherein the air cleaner is disposed in front of a rear wheel and in the concave region. 2. The scooter type vehicle according to claim 1, wherein the air cleaner is disposed in front of a rear wheel and has a bottom surface positioned in a position lower than an upper portion of the rear wheel in a side view. Intake device. The vehicle body frame includes vehicle body side suspension portions that are provided in pairs in the vehicle width direction while suspending the power unit, and these vehicle body side suspension portions are coupled to the engine side suspension portions via a pair of link plates, respectively. On the other hand, these link plates are connected together by a connecting bar,
The air intake device for a scooter type vehicle according to claim 2, wherein an air intake passage from the air cleaner to the engine is disposed above the connecting bar in a side view. 6. The intake system for a scooter type vehicle according to claim 5, wherein a fuel injector is provided in the intake passage, and the fuel injector is disposed above a connecting bar of the link plate.

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