JP5578002B2 - Canister layout in a scooter type motorcycle - Google Patents

Description

  The present invention relates to a canister arrangement structure in a scooter type motorcycle.

  Since gasoline, which is a fuel for vehicles such as motorcycles, has high volatility, it is vaporized in the fuel tank by running or parking in hot weather. Since this gasoline vapor causes air pollution, a canister is mounted between the fuel tank and the engine. The fuel gas vaporized in the fuel tank is collected by the canister, sucked out of the canister using the negative pressure of the engine intake system by the start of the engine, supplied to the engine, and used for combustion.

  As this type of technology, for example, Patent Document 1 discloses a configuration in which a canister is disposed in a rear cover above a rear fender behind a helmet storage box in a scooter type vehicle having a helmet storage box at the lower part of the seat.

Japanese Patent No. 2992005

  However, the scooter type vehicle disclosed in Patent Document 1 has a fuel tank arranged below the step floor, and the rear cover above the rear fender behind the helmet storage box is a dead space, and a canister is installed in the dead space. It is arranged. When the fuel tank is disposed below the step floor in this way, it is necessary to protect the fuel tank with a frame so that the fuel tank does not contact the road surface, which increases the number of parts and the weight of the frame. Further, since the fuel tank and the canister are separated from each other, the hose therebetween becomes long and the assembling property is also deteriorated.

  When it is intended to mount not only the storage box but also the fuel tank below the seat, the canister arrangement of Patent Document 1 cannot be applied as it is.

  The present invention has been made in view of the above points, and an object of the present invention is to allow a canister to be stored in a compact manner while disposing a storage box and a fuel tank below a seat.

The arrangement structure of the canister in the scooter type motorcycle of the present invention is the arrangement structure of the canister in the scooter type motorcycle in which the front of the seating seat enters the lower side and a step floor is formed at the bottom thereof. Left and right rear frames extending rearward and upward behind the step floor, a storage box provided between the left and right rear frames, and a front or rear of the storage box between the left and right rear frames A fuel tank, a seating seat arranged to cover the storage box and the upper side of the fuel tank, and a rear end portion of the left and right rear frames behind the storage box and the fuel tank. A seat lock bracket for receiving a rear end portion of the seating seat, and a space below the seat lock bracket. A canister, wherein the canister is disposed so that they at least partially overlap in the vertical direction and the seat lock bracket and said Rukoto.
Another feature of the arrangement structure of the canister in the scooter type motorcycle according to the present invention is that the canister has a substantially rectangular parallelepiped shape or a substantially cylindrical shape, and is arranged so that the longitudinal direction thereof is in the vehicle width direction. In the point.
Another feature of the arrangement structure of the canister in the scooter type motorcycle according to the present invention is that the fuel gas outlet of the fuel tank and the fuel gas inlet of the canister are arranged offset to one side in the vehicle width direction. The surge pipe connected to the fuel gas outlet of the fuel tank once extends to the other side in the vehicle width direction and is curved in a substantially U shape to connect to the fuel gas inlet of the canister.
Another feature of the arrangement structure of the canister in the scooter type motorcycle of the present invention is that a base is arranged below the rear ends of the left and right rear frames, and a rear fender extending rearward is provided. The canister is located on the base of the rear fender.
Another feature of the arrangement structure of the canister in the scooter type motorcycle of the present invention is that the canister is arranged at a position lower than the rear end portion of the rear frame in a side view of the vehicle.
It is another feature of the arrangement structure of the canister in the scooter type motorcycle of the present invention, the seat lock bracket lies in Ru portal der disposed so as to rise to the left and right rear frames .
Another feature of the arrangement structure of the canister in the scooter type motorcycle of the present invention is that a bracket for supporting the tail lamp is provided on the upper surface of the seat lock bracket so as to extend rearward. The canister is disposed at a position lower than the tail lamp in a side view of the vehicle.
Another feature of the arrangement structure of the canister in the scooter type motorcycle of the present invention is that a rollover valve is provided above the canister and below the seat lock bracket.

  According to the present invention, the canister can be stored compactly while the storage box and the fuel tank are disposed below the seating seat.

1 is a left side view showing a schematic configuration of a scooter type motorcycle according to an embodiment. 1 is a left side view showing a schematic configuration of a rear part of a scooter type motorcycle according to the present embodiment. It is a figure showing the arrangement structure of the canister in the scooter type motorcycle concerning this embodiment. It is a figure showing the arrangement structure of the canister in the scooter type motorcycle concerning this embodiment.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a left side view showing a schematic configuration of a scooter type motorcycle according to the present embodiment. FIG. 2 is a left side view showing a schematic configuration of the rear part of the scooter type motorcycle according to the present embodiment (with the seating seat 12 and the vehicle body cover removed). 3 and 4 are views showing the arrangement structure of the canister in the scooter type motorcycle according to this embodiment, FIG. 3 is a perspective view seen from the front, and FIG. 4 is a partially sectional perspective view seen from the rear. . In addition, the front-rear and left-right directions used in the following description refer to directions seen from the driver when riding the vehicle.

  As shown in FIG. 1, a motorcycle body frame includes a head pipe 1, a down tube 2 that extends downward from the head pipe 1, extends substantially horizontally from the middle toward the rear, and a rear of the down tube 2. It is composed of left and right rear frames 3R, 3L extending rearward and upward from the end portions. The left and right front forks 4 are supported by the head pipe 1 so as to be rotatable left and right. A front wheel 5 is rotatably supported at a lower portion of the front fork 4, and the front wheel 5 is steered left and right by a handle bar 6.

  As shown in FIG. 2, the rear frames 3R and 3L rise from the rear end portion of the down tube 2, and gradually rise from the middle and extend rearward. A storage box 7 is disposed between the left and right rear frames 3R, 3L. The storage box 7 is mounted such that its front portion protrudes forward from the rear frames 3R and 3L. A fuel tank 8 is disposed behind the storage box 7 between the left and right rear frames 3R, 3L. The fuel tank 8 is mounted between the rear frames 3R and 3L, and has a shape that bulges downward.

  A seat lock bracket 9 is installed between the rear ends of the left and right rear frames 3R, 3L behind the fuel tank 8. As shown in the figure, the seat lock bracket 9 is a gate-type bracket that is installed so as to stand up with respect to the rear frames 3R and 3L. A bracket 11 for supporting the tail lamp 10 is provided on the upper surface of the seat lock bracket 9 so as to extend rearward.

  A seating seat 12 is installed above the storage box 7 and the fuel tank 8. The seating seat 12 is supported by a hinge mechanism so as to be pivotable up and down, and a rear portion engages with a seat lock bracket 9 so as to be opened and closed, and also serves as a lid for the storage box 7 and the fuel tank 8.

  As shown in FIG. 2, a support frame 14 is provided below the rear frames 3R and 3L via a bracket 13, and the engine unit 15 is swingably coupled to the support frame 14. The engine unit 15 is integrally provided with a four-cycle single-cylinder engine body 16 that is disposed in a substantially horizontal shape with the cylinder head facing forward, and a transmission case 17 that extends rearward from the left side of the engine body 16. . The transmission case 17 also serves as a swing arm. The rear case 18 pivotally supports a rear wheel 18 as a driving wheel and is elastically supported by the rear frame 3L by a rear cushion unit 19. The scooter type motorcycle according to the present embodiment is a type having the rear cushion unit 19 only on the left side of the vehicle, but may be a type having a rear cushion unit on the left and right sides of the vehicle.

  An exhaust pipe 20 is connected to the exhaust port of the engine body 16 of the engine unit 15. The exhaust pipe 20 extends rearward on the opposite side of the transmission case 17, that is, the lower part on the right side of the vehicle, and a muffler 21 extending rearward and obliquely upward is connected to the rear end of the exhaust pipe 20.

  In addition, an air cleaner 22 is provided on the transmission case 17 of the engine unit 15 to suck and clean the outside air. The air cleaner 22 is connected to the engine body 16 via a suction pipe 23, a throttle body 24 having an injector, and an intake pipe 25, and is integrated with the engine unit 15.

  In the scooter type motorcycle, the front of the seating seat 12 enters the lower side, and a step floor 26 is formed at the bottom. The vehicle body frame is covered with a vehicle body cover, and the vehicle body cover constitutes the appearance of the vehicle. The vehicle body cover is configured by combining a plurality of cover elements. Among them, the rear frame cover front 27 and the rear frame cover 28 are below the seating seat 12 and cover the periphery of the rear frames 3R and 3L. A tail lamp 10 is disposed at the rear end of the rear frame cover 28. Further, a base surface 29 a forming a base portion of the rear fender 29 is disposed below the rear end portions of the left and right rear frames 3 </ b> R and 3 </ b> L, and the rear fender 29 extends rearward so as to continue to the rear frame cover 28.

  Here, as shown in FIGS. 2 and 3, in the space below the seat lock bracket 9, a canister 30 constituting the fuel evaporative emission control device is disposed. As shown in FIG. 2, the canister 30 is disposed at a position lower than the rear end portions of the rear frames 3 </ b> R and 3 </ b> L in a vehicle side view and higher than the bottom of the fuel tank 8. Further, it is disposed at a position lower than the tail lamp 10 located substantially on the extension line of the rear frames 3R and 3L.

  Further, the canister 30 is a substantially rectangular parallelepiped, and is disposed such that the longitudinal direction thereof faces the vehicle width direction.

  As shown in FIG. 4, the canister 30 is placed on the base surface 29 a of the rear fender 29. A base surface 29a of the rear fender 29 is a substantially horizontal plane, and is surrounded by left and right walls 29b and a rear wall 29c. The left and right walls 29b have substantially three shapes with one side extending along the lower side of the rear end of the rear frame 3R, 3L in a side view of the vehicle. A protrusion 29d is erected from the base surface 29a of the rear fender 29, and the canister 30 is fixed by engaging the rubber band 31 wound around the canister 30 with the protrusion 29d. Since the canister 30 is placed on the base surface 29a surrounded by the walls 29b and 29c in this way, it does not appear in the appearance.

  A one-way valve 32 is supported inside the left rear frame 3L. A rollover valve 33 is disposed directly below the seat lock bracket 9 and above the canister 30. A surge hose 34 connected to a fuel gas outlet (not shown) of the fuel tank 8 is connected to a fuel gas inlet 30 a on the upper surface of the right end portion of the canister 30 via a rollover valve 33. Further, the surge hose 34 branches off in the middle and is also connected to the one-way valve 32. The one-way valve 32 opens when the pressure in the surge hose 34 becomes higher than a specified value, and discharges the pressure to the outside. In addition, the rollover valve 33 closes when the vehicle is tilted by a predetermined angle or more, shuts off the fuel tank 8 and the canister 30, and prevents fuel leakage when the vehicle falls.

  A fuel gas outlet (not shown) of the fuel tank 8 and a fuel gas inlet 30a of the canister 30 are arranged to be offset to the right side in the vehicle width direction. The surge pipe 34 connected to the fuel gas outlet of the fuel tank 8 once extends to the left in the vehicle width direction, curves in a substantially U shape, passes over the canister 30 and passes through the one-way valve 33 and the canister 30. To the fuel gas inlet 30a. As described above, the fuel gas outlet (not shown) of the fuel tank 8 is arranged so as to be shifted to the right side in the vehicle width direction. Therefore, when the vehicle falls to the left side, the position of the fuel gas outlet becomes high and the fuel tank 8 Fuel leakage can be prevented. Further, since the surge pipe 34 is curved in a substantially U shape, when the vehicle falls to the right side, the curved portion becomes the highest position and shuts off the fuel tank 8 and the canister 30, thereby preventing fuel leakage. it can.

  An outside air inlet 30 b is provided on the left end surface of the canister 30. Further, purge hoses 35 and 36 are connected to the right end surface of the canister 30 and the front surface of the right end portion. The purge hoses 35, 36 extend along the right rear frame 3 </ b> R, the purge hose 35 is connected to the intake pipe 25, and the purge hose 36 is connected to the throttle body 24. When the purge hose 35 becomes negative due to the negative pressure of the engine intake system due to the start of the engine, a valve (not shown) in the canister 30 opens. As a result, the purge hose 36 communicates with the canister 30 and guides the fuel gas collected by the canister 30 to the throttle body 24 using the negative pressure of the engine intake system.

  In the fuel evaporative emission control device thus configured, the fuel gas vaporized in the fuel tank 8 passes through the separator in the upper part of the fuel tank 8, passes through the pipe passing through the fuel tank 8 up and down, and passes through the fuel tank 8. 8 is introduced into the surge hose 34 from the fuel gas outlet on the lower surface. The fuel gas introduced into the surge hose 34 passes through the rollover valve 33 and is collected by the canister 30. The fuel gas collected by the canister 30 is supplied to the engine main body 16 through the purge hose 36 using the negative pressure of the engine intake system due to the start of the engine, and is used for combustion.

  As described above, the canister 30 is disposed in the space below the seat lock bracket 9, and the canister 30 having a substantially rectangular parallelepiped shape is disposed so that the longitudinal direction thereof faces the vehicle width direction. Is not affected by the canister 30, the relief shape can be reduced, and the capacity can be secured. That is, since the base portion of the rear fender 29 is disposed below the seat lock bracket 9, the lower portion of the fuel tank 8 is originally swollen so as to escape below the seat lock bracket 9. Since the canister 30 is disposed using the space, it is not necessary to form a relief shape for avoiding the canister 30 in the fuel tank 8.

  Further, since the fuel tank 8 is provided between the left and right rear frames 3L and 3R, the fuel tank 8 and the canister 30 are close to each other, and the surge hose 34 between them can be shortened and the assembling property is improved.

  As mentioned above, although this invention was demonstrated with various embodiment, this invention is not limited only to these embodiment, A change etc. are possible within the scope of the present invention. For example, the canister 30 has been described as having a substantially rectangular parallelepiped shape, but may have other shapes such as a substantially cylindrical shape, and in this case, the canister 30 is disposed so that the longitudinal direction is in the vehicle width direction. Further, although the storage box 7 is disposed forward and the fuel tank 8 is disposed rearward between the left and right rear frames 3L and 3R, the front-rear relationship may be reversed.

  1: head pipe, 2: down tube, 3L, 3R: rear frame, 4: front fork, 5: front wheel, 6: handlebar, 7: storage box, 8: fuel tank, 9: seat lock bracket, 10: tail lamp , 11: bracket, 12: seat, 13: bracket, 14: support frame, 15: engine unit, 16: engine body, 17 transmission case, 18: rear wheel, 19: rear cushion unit, 20: exhaust pipe, 21 : Muffler, 22: air cleaner, 23: suction pipe, 24: throttle body, 25: intake pipe, 26: step floor, 27: rear frame cover front, 28: rear frame cover, 29: rear fender, 29a: base surface, 29b 29c: wall, 29d: protrusion, 30: canister, 30a Fuel gas inlet, 30b: outside air inlet, 31: Band, 32: one-way valve, 33: rollover valve 34: Surge hose, 35, 36: purge hose

Claims (8)

The arrangement structure of the canister in the scooter type motorcycle in which the front of the seating seat is bayed downward and the step floor is formed at the bottom thereof,
Left and right rear frames extending rearward and rearward of the step floor;
A storage box provided between the left and right rear frames;
A fuel tank provided in front of or behind the storage box between the left and right rear frames;
A seating seat disposed so as to cover the storage box and the fuel tank;
A seat lock bracket that is installed between rear ends of the left and right rear frames behind the storage box and the fuel tank, and that receives a rear end of the seating seat;
A canister disposed in a space below the seat lock bracket ;
The canister arrangement structure in a scooter type motorcycle , wherein the canister is arranged so as to at least partially overlap the seat lock bracket in the vertical direction .   2. The canister arrangement structure in a scooter type motorcycle according to claim 1, wherein the canister has a substantially rectangular parallelepiped shape or a substantially cylindrical shape, and is arranged such that a longitudinal direction thereof faces a vehicle width direction. The fuel gas outlet of the fuel tank and the fuel gas inlet of the canister are arranged offset to one side in the vehicle width direction,
The surge pipe connected to the fuel gas outlet of the fuel tank once extends to the other side in the vehicle width direction, and is bent in a substantially U shape to be connected to the fuel gas inlet of the canister. 3. A canister arrangement structure in the scooter type motorcycle according to 2. A base portion is disposed below the rear end portions of the left and right rear frames, and includes a rear fender extending rearward.
The canister arrangement structure in a scooter type motorcycle according to any one of claims 1 to 3, wherein the canister is mounted on a base portion of the rear fender.   The canister arrangement structure in a scooter type motorcycle according to any one of claims 1 to 4, wherein the canister is arranged at a position lower than a rear end portion of the rear frame in a side view of the vehicle. The seat locking bracket arrangement of the canister in the scooter-type motorcycle according to any one of claims 1 to 5, wherein the Ru the installed portal der to stand up against the left and right rear frames Construction. On the upper surface of the seat lock bracket, a bracket for supporting the tail lamp is provided so as to extend backward,
The canister arrangement structure in a scooter type motorcycle according to any one of claims 1 to 6, wherein the canister is arranged at a position lower than the tail lamp in a side view of the vehicle. The canister arrangement structure for a scooter type motorcycle according to any one of claims 1 to 7, wherein a rollover valve is provided above the canister and below the seat lock bracket.

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