JP5663889B2 - Canister mounting structure for motorcycles - Google Patents

Description

  The present invention relates to a mounting structure for a canister mounted on a motorcycle.

  Conventionally, in a fuel tank of a motorcycle, it is known that the stored fuel is vaporized and stays as evaporative gas in the upper part of the fuel tank. If this evaporative gas leaks into the air when the engine is stopped or the like, fuel is wasted and there is a concern about the environmental impact. In order to solve this problem, Patent Document 1 discloses that a canister is disposed on a seat rail of a motorcycle, evaporating gas in a fuel tank is guided to the canister, and adsorbed on activated carbon or the like in the canister. A structure is disclosed in which evaporative gas in the canister is drawn into the carburetor at startup.

Japanese Patent No. 3223729

  By the way, in recent years, a vehicle having a fuel tank larger than that of a conventional motorcycle has been developed to enable long touring. In such a large fuel tank, more evaporative gas is generated, and thus the canister needs to be expanded. However, in the one disclosed in Patent Document 1, when the canister is expanded, the rear cowl must be bulged toward the vehicle side. If the rear cowl bulges toward the side of the vehicle in this way, there is a problem that it becomes easy to hit or hit the passenger's leg and deteriorates the riding comfort.

  Further, since a canister is generally a container containing an adsorbent, it is desirable to avoid applying a strong impact. However, in the motorcycle disclosed in Patent Document 1, the canister and the ground come into contact with each other at the time of falling, and there is a fear that a strong impact is applied to the canister.

  In view of the above problems, an object of the present invention is to provide a canister mounting structure for a motorcycle that improves ride comfort for passengers and ensures high safety against the canister.

In order to solve the above problem, in the canister mounting structure for a motorcycle according to the present invention, a rear cowl that covers a seat rail that constitutes a rear portion of a vehicle frame, and an evaporative gas in a fuel tank disposed above the front portion of the vehicle frame The seat rail has an inward portion that reduces its width as it goes rearward, and the canister is disposed inside the rear cowl behind the front end of the inward portion. The canister is disposed so that at least a part of the canister overlaps with a rear seat on which a passenger is seated in the front-rear direction of the vehicle, and the inward portion is provided on the rear side of the seat rail and is covered by the rear cowl. A rear part of the inner side of the rear cowl behind the front end of the inward part, and the seat The canister is disposed between the rail and the rear cowl, constitute the vehicle exterior and front side exposure of the seat rail, attaching said canister outside side of the rear of the internal counter portion of a front end of the inward portion It is characterized by that.

Further, in the canister mounting structure for a motorcycle of the present invention, the inward portion is provided on the rear side of the seat rail and is covered by the rear cowl, and is inside the rear cowl behind the front end of the inward portion, The canister is disposed between the seat rail and the rear cowl, and a front side of the seat rail is exposed to form a vehicle exterior.

  Further, in the canister mounting structure for a motorcycle according to the present invention, a pillion step for a passenger to put his / her foot on the lower side of the seat rail is provided, and the canister is mounted on the seat rail inside the outer end of the pillion step. It is attached.

According to the above-described configuration, by providing the canister in the narrow inward portion, the width dimension of the rear cowl can be substantially reduced, the knee grip performance for the passenger can be improved, and the posture can be stabilized.
Further, since the pillion step contacts before the rear cowl contacts the ground when the vehicle falls, contact between the rear cowl and the ground can be prevented, and as a result, impact to the canister can be prevented.

1 is a left side view of a vehicle to which the present invention is applied. It is a top view of the vehicle rear part which removed the vehicle exterior component in embodiment of this invention. FIG. 3 is a right side view in FIG. 2. FIG. 3 is a left side view in FIG. 2. FIG. 3 is a rear perspective view in FIG. 2. It is a top view of the vehicle rear part in the embodiment of the present invention. It is a side view of the vehicle rear part in the embodiment of the present invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a canister mounting structure for a motorcycle according to the present invention will be described with reference to the drawings.
The detailed structure of the present invention will be described with reference to FIGS. In addition, the direction instruction described in the following description is based on the direction viewed from the driver when the vehicle is boarded. In this case, in each of the drawings used in the description, the front of the vehicle is indicated by an arrow Fr, the rear of the vehicle is indicated by an arrow Rr, and the lateral right side of the vehicle is indicated by an arrow R. Indicated by arrow L.

Overall vehicle structure First, the overall vehicle structure to which the present invention is applied will be described. In the motorcycle 10, a front fork 11 is provided at the front end of a vehicle frame extending in the front-rear direction of the vehicle so as to be pivotable left and right. A front wheel 12 is attached to the front fork 11. The vehicle frame is composed of a main frame 13 that constitutes a substantially front half of the vehicle and a seat rail 14 that constitutes the rear half of the vehicle.

  A throttle body 16 that adjusts the amount of air supplied to the engine 15 and an air cleaner 17 that supplies air to the throttle body 16 are continuously connected upward and rearward of the engine 15. Above the air cleaner 17, a fuel tank 18 is attached to the main frame 13, and is connected to a fuel injection device and a fuel hose (both not shown) attached to the throttle body 16 to supply fuel. It is like that.

  A front cowl 19 is attached to the front portion of the vehicle. The front cowl 19 is provided with a headlamp 20 and a pair of left and right direction indicators 21. A side cowl 22 that covers the side of the vehicle is connected to the lower end of the front cowl 19.

  A swing arm 23 is slidably attached to the rear part of the main frame 13, and a rear wheel 24 is attached to the rear end of the swing arm 23, and the power of the engine 15 is transmitted in the same manner as in the known technique. The rear wheel 24 is driven. The seat rail 14 is attached to the upper rear portion of the main frame 13 and extends rearward and upward. A front seat 25 on which the driver is seated is disposed on the upper surface of the rear cowl 26 behind the fuel tank 18. The front seat 25 is fixed to the seat rail 14.

  A rear seat 27 on which a passenger is seated is attached behind and above the front seat 25. A pillion step 28 for the passenger to put his / her foot on is fixed at the lower part of the seat rail 14 below the rear part of the front seat 25. The pillion step 28 is provided with its stay 29 extending rearward and downward from the attachment position with the seat rail 14, and a step portion 30 for placing a foot on the tip of the stay 29 is disposed. The step portion 30 is located between the front seat 25 and the rear seat 27 in the front-rear direction. As shown by the dotted line in FIG. 2, the step unit 30 is configured to be tiltable toward the vehicle upper rear. With this structure, the passenger can stabilize the posture by sitting on the rear seat 27 and putting his / her foot on the pillion step 28 and sandwiching the waist of the driver with both knees (called knee grip).

Further, referring to FIG. 6, a substantially U-shaped (or V-shaped) turn part 31 is formed between the front seat 25 and the rear seat 27 on the left and right side surfaces of the rear cowl 26. The vehicle width dimension w of the rear cowl 26 formed by the turned portion 31 is set smaller than the maximum width w ₁ of the front seat 25. Further, the turning portion 31 is formed wider in the vehicle width direction as it goes downward from the innermost point O. Further, as shown in FIG. 7, when the triangle ABC is constituted by the turn part 31 in a side view, the triangle B (or point B) has a triangular shape that extends significantly backward from the points A and C. Present.

  If comprised in this way, when a passenger | crew will carry out a knee grip as mentioned above, the space | interval of a knee can be narrowed by aligning the inner side of a lower leg with the turn part 31, and it will become easy to pinch | pin a driver | operator's waist. Further, when knee grip is performed at the groin portion 31, the lower leg of the human leg is substantially C-shaped, that is, the lower side becomes wider, so the upper end (point A or point C side) to the lower end (point B side) ) At the same depth (depth of the V-shaped valley), the lower leg is separated from the rear seat 27 as it goes downward. Therefore, in the present invention, the turning portion 31 is configured such that the depth of the valley becomes shallower as it goes downward.

  Furthermore, it is possible to make the knee grip stronger even if the turn portion 31 is formed along the vertical direction. In this case, for example, a surface that is perpendicular to the traveling direction of the vehicle is formed, such as an imaginary line AB, so that the traveling wind may hit this surface and deteriorate the traveling performance. For this reason, the point B is formed at least behind the point A, and the traveling wind is configured to escape downward along the side AB.

  A part of the side surface and the upper surface of the seat rail 14 is covered with a rear cowl 26. At the rear end of the rear cowl 26, a taillight 32 and a pair of left and right direction indicators 33 are disposed. In addition, a prop stand 34 that supports the vehicle body at the time of parking is attached to the lower left portion of the vehicle so as to be rotatable with respect to the main frame 13 (see the dotted line in FIG. 1).

Canister Arrangement Structure Next, the canister arrangement (or attachment) structure of the present invention will be described mainly with reference to FIGS.
In FIG. 2, the seat rail 14 is provided with inward portions 14 a on the left and right side surfaces in a plan view in which the dimension in the vehicle width direction decreases toward the rear. The seat rail 14 behind the front end 14b of the inward portion 14a is covered with a rear cowl 26 on the side surface and a part of the upper surface. Further, the front end lower portion 26a of the rear cowl 26 is formed along the front end 14b of the inward portion 14a (see also FIG. 7).

  3 and 4, the canister 35 of the present invention has a first canister 35 </ b> A on the right side surface of the seat rail 14 that is behind the front end 14 b of the inward portion 14 a and behind the turn portion 31 of the rear cowl 26. The second canister 35B is disposed on the left side surface. Both of these canisters 35A and 35B are fixed to the seat rail 14 by a fixing belt 36. By attaching the canister 35 to the rear of the turn part 31 in this way, when designing the turn part 31, a sufficient degree of design freedom of the turn part 31 is secured and a shape along the lower leg of the passenger is provided. And by extension, the posture of the passenger can be stabilized.

  Further, since the canister 35 is generally a container containing an adsorbent, it is desirable to avoid applying a strong impact. For example, if the canister 35 is attached at the same position without the inward portion 14 a, the outer surface of the canister 35 is provided so as to protrude outward from the pillion step 28. If it is assumed that the vehicle falls in such a state, the rear cowl 26 covering the canister 35 may come into contact with the ground before the pillion step 28, and then a strong impact may be applied to the canister 35.

  Therefore, as in the present invention, the inward portion 14a is provided so as to reduce the width of the vehicle frame, and the canister 35 is attached to the rear of the front end of the inward portion 14a. ) And canister 35 can be protected from a strong impact.

Canister Piping Structure Next, the canister piping structure of the present invention will be described mainly with reference to FIGS. 2 to 4 and 5.
A connection hose 37 is connected to the rear end of the first canister 35A. The connection hose 37 extends along the upper surface of the rear end of the seat rail 14 to the left side of the vehicle, and then bypasses the lower side of the second canister 35B. , Connected to the front end of the second canister 35B. A gas recovery tube 39 that connects the upper portion of the fuel tank 18 and the first canister 35A and a gas supply tube 38 that connects the first canister 35A and the throttle body 16 are connected to the front end of the first canister 35A. Yes.

  More specifically, after the gas recovery tube 39 and the gas supply tube 38 both extend toward the front of the first canister 35A, the direction of the gas recovery tube 39 and the gas supply tube 38 are changed to the left side of the vehicle, and the middle connecting the right and left of the seat rail 14 is connected. It is supported by a fixed bracket 41 erected on the bridge 40 and extends to the left inner surface of the seat rail 14. In FIG. 5, each of the gas recovery tube 39 and the gas supply tube 38 is configured by a metal pipe 42 from the right outer surface of the seat rail 14 to the left of the fixing bracket 41. Generally, a lightweight rubber material is used for the tube through which the evaporating gas passes.

  In this case, both the gas recovery tube 39 and the gas supply tube 38 need to pass between the front seat 25 and the seat rail 14. Therefore, if a rubber tube having a thick wall and a large outer diameter is used, the front seat 25 will be set further upward, and the seat height will be increased, and there is a possibility that the driver's footing will be deteriorated. . Therefore, the metal pipe 42 having a relatively small pipe diameter is employed to improve the footing property.

  Here, a space in front of the intermediate bridge 40 and behind the battery 43 is partitioned as an auxiliary equipment parts storage space 44 in which sensors and electrical parts necessary for the operation of the engine 15 or the headlamp 20 are stored. Yes. Further, the rear of the intermediate bridge 40 is partitioned as a tool storage space 45.

  The gas recovery tube 39 turns forward along the left inner surface of the seat rail 14, passes through the gap between the battery 43 and the seat rail 14, extends below the fuel tank 18, and extends from below the fuel tank 18. The fuel tank 18 enters the fuel tank 18 and extends to the upper part of the fuel tank 18. On the other hand, the gas supply tube 38 is connected to the throttle body 16 via a purge valve (not shown) that changes its direction from the left inner surface of the seat rail 14 toward the front and is electrically opened and closed according to the engine speed and the like.

  In the above configuration, the evaporating gas staying in the upper part of the fuel tank 18 passes through the gas recovery tube 39 and is adsorbed by the adsorbent (for example, activated carbon) in the first canister 35A. When the first canister 35 </ b> A is filled, the first canister 35 </ b> A is attracted to the second canister 35 </ b> B via the connection hose 37. When the engine 15 is started, for example, the purge valve is opened as the engine speed increases, and the inside of the throttle body 16 becomes negative pressure. Therefore, the evaporated gas adsorbed by the first canister 35A and the second canister 35B It is drawn into 16 and supplied to the engine 15.

  Now, particularly in the canister mounting structure of the present invention described above, the canister 35 is first mounted inside the rear cowl 26 behind the front end of the inward portion 14a for reducing the width dimension of the seat rail 14. By providing the canister 35 in the narrow inward portion 14a in this way, it is possible to suppress the rear cowl 26 that covers it from bulging more than necessary, and to substantially reduce the width dimension of the rear cowl 26. As a result, the rear cowl does not hit the passenger's legs, so that the passenger can surely perform the knee grip and can stabilize the posture.

  In this case, the inward portion 14a is provided on the rear side of the seat rail 14 and is covered with the rear cowl 26. However, the front side of the seat rail 14 is exposed to form a vehicle appearance. In this way, the mounting position of the canister 35 is set to a suitable portion in relation to the seat rail 14 and the rear cowl 26, and it is extremely advantageous in terms of external configuration while improving functions such as riding comfort.

  Further, the canister 35 is attached to the seat rail 14 inside the outer end of the pillion step 28. For example, when the vehicle falls, the pillion step 28 comes into contact before the canister 35 comes into contact with the ground, so that contact between the canister 35 and the ground can be prevented, and high safety for the canister 35 can be secured.

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.
In the above embodiment, the example in which the first canister 35A and the second canister 35B are arranged one by one on the left and right has been described, but two or more canisters can be arranged on either the left or right.

10 motorcycle, 12 front wheel, 13 main frame, 14 seat rail, 15 engine, 16 throttle body, 17 air cleaner, 18 fuel tank, 19 front cowl, 20 headlight, 21 direction indicator, 22 side cowl, 23 swing arm 24 rear wheel 25 front seat 26 rear cowl 27 rear seat 28 pillion step 29 stay 30 step part 31 turn part 32 tail light 33 direction indicator 34 prop stand 35 canister 35A first canister 35B 2nd canister, 36 fixed belt, 37 connection hose, 38 gas supply tube, 39 gas recovery tube, 40 intermediate bridge, 41 fixed bracket, 42 metal pipe, 43 battery.

Claims (2)

In a motorcycle comprising a rear cowl that covers a seat rail that forms a rear portion of a vehicle frame, and a canister that adsorbs evaporated gas in a fuel tank disposed above the front portion of the vehicle frame,
The seat rail has an inward portion that reduces its width dimension as it goes rearward, and the canister is disposed inside the rear cowl behind the front end of the inward portion,
At least a part of the canister is disposed so as to overlap with a rear seat on which a passenger is seated in the front-rear direction of the vehicle ,
The inward portion is provided on the rear side of the seat rail and is covered by the rear cowl,
A rear portion of the rear cowl inside the rear cowl behind the front end of the inward portion, and the canister is disposed between the seat rail and the rear cowl,
The front side of the seat rail is exposed to form a vehicle appearance,
A canister mounting structure for a motorcycle , wherein the canister is mounted on the outer side of the inward portion behind the front end of the inward portion . The passenger below the seat rail provided pillion step for placing the feet, according to claim 1, characterized in that than the outer end of the pillion step was attached to the canister to the inside of the seat rail Canister mounting structure for motorcycles.

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