JP6364446B2 - Motorcycle - Google Patents

Description

  The present invention relates to a motorcycle including a canister.

  In a conventional motorcycle, a canister that adsorbs the evaporated fuel generated in the fuel tank is installed in order to prevent the evaporated fuel generated in the fuel tank from being released into the atmosphere. In the motorcycle disclosed in Patent Document 1, a canister is disposed below a fuel tank provided so as to straddle a main frame extending rearward from the head pipe. More specifically, the canister is disposed behind a down tube extending downward from the head pipe and in front of an upper part of a cylinder head of the internal combustion engine.

International Publication No. 2015/174168

  As disclosed in Patent Document 1, when the canister is disposed behind the down frame and in front of the upper part of the cylinder head, the canister is easily subjected to traveling wind and may increase traveling resistance.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a motorcycle including a canister arrangement structure capable of suppressing running resistance due to running wind.

In order to achieve the above object, the invention described in claim 1
A main frame extending rearward from the head pipe;
An engine disposed below the main frame and having a cylinder axis oriented vertically;
A fuel tank provided above the engine;
A canister for collecting the evaporated fuel in the fuel tank;
In a motorcycle equipped with
The canister is located directly below the main frame so that at least a part of the canister is positioned behind the rear end of the cylinder head of the engine and above the upper end of the cylinder head when viewed from the side of the vehicle. It is characterized by being arranged in.

The invention according to claim 2 is the motorcycle according to claim 1,
At least a part of the canister is disposed within the vertical width of the head cover in the vertical direction.

The invention according to claim 3 is the motorcycle according to claim 1 or 2,
At least a part of the canister is disposed so as to overlap the fuel tank in a side view of the vehicle.

The invention according to claim 4 is the motorcycle according to any one of claims 1 to 3,
At least a part of the canister is arranged so as to overlap with a side cover that covers the side surface of the vehicle in a side view of the vehicle.

The invention according to claim 5 is the motorcycle according to any one of claims 1 to 4,
The canister is elastically supported by a stay attached to a lower portion of the main frame.

The invention according to claim 6 is the motorcycle according to any one of claims 1 to 5,
At least a part of the canister is located between the throttle valve and the cylinder of the engine in the front-rear direction.

The invention according to claim 7 is the motorcycle according to any one of claims 1 to 6,
A fuel pump is disposed on a straight line passing through the axis of the canister and the center of the throttle body in a side view of the vehicle.

  According to the first aspect of the present invention, the canister is disposed below the main frame so that at least a part of the canister is located behind the cylinder head rear end and above the cylinder head upper end in a side view of the vehicle. Therefore, the entire canister can be prevented from receiving the traveling wind, and the resistance caused by the traveling wind can be reduced.

  According to the invention of claim 2, since at least a part of the canister is disposed within the vertical width of the head cover in the vertical direction, the canister hides behind the head cover and is difficult to receive the traveling wind. Can be small.

  According to the invention of claim 3, since at least a part of the canister is arranged so as to overlap the fuel tank when viewed from the side of the vehicle, the canister can be hidden by the fuel tank when viewed from the side of the vehicle. Designability is improved. Further, since the canister is provided near the fuel tank, the hose connecting the tank and the canister can be shortened.

  According to the invention of claim 4, since at least a part of the canister is disposed at a position overlapping the side cover that covers the vehicle side surface in a side view, the canister can be hidden by the side cover when viewed from the vehicle side surface side. The appearance is improved.

  According to the invention of claim 5, since the canister is elastically supported by the stay attached to the lower portion of the main frame, the influence of the vehicle body vibration on the canister can be reduced and the canister protection function can be enhanced.

  According to the sixth aspect of the present invention, at least a part of the canister is located between the throttle valve and the engine cylinder in the front-rear direction, so that the heat from the cylinder is received to effectively vaporize the fuel in the canister. And the supply path of vaporized fuel to the engine can be shortened.

1 is a left side view of a motorcycle according to an embodiment of the present invention. Fig. 3 is a right side view of a main part of the motorcycle with a fuel tank, a seat, and a side cover removed. Fig. 3 is a left side view of a main part of the motorcycle with a fuel tank, a seat, and a side cover removed. Fig. 3 is a plan view of the main part of the motorcycle with the fuel tank, seat and side cover removed. Fig. 4 is a cross-sectional view of the motorcycle taken along line AA in Fig. 3 along line AA.

  Hereinafter, an embodiment of a saddle riding type vehicle according to the present invention will be described with reference to the accompanying drawings. It should be noted that the drawings are viewed in the direction of the reference numerals, and in the following description, front, rear, left and right, and top and bottom are in accordance with the direction seen from the driver, and the front of the vehicle is Fr, rear is Rr, left is L, right is R, upper is shown as U, and lower is shown as D.

  In FIG. 1, a body frame 2 of a motorcycle 1 includes a head pipe 3 that supports a front fork 18 and a handle 19 (see FIG. 4) that pivotally support a front wheel FW so as to be steerable, and a rear lower portion of the head pipe 3. A main frame 5 that extends, a pair of left and right seat rails 6 that are connected to the front end of the main frame 5 and extend rearward, a down frame 8 that extends rearwardly downward from the front end of the main frame 5, and a rear end of the main frame 5 And a pivot frame 7 coupled to the portion.

  The engine 10 is disposed behind the down frame 8 and below the main frame 5 and ahead of the pivot frame 7. More specifically, the engine 10 is supported by the lower end portion of the down frame 8 and the pivot frame 7 and is mounted so as to be surrounded by the main frame 5, the down frame 8 and the pivot frame 7. Here, the engine 10 is mounted such that the cylinder axis CL is directed vertically. That is, with the crankcase 11 as a lower end portion, a cylinder 12 is disposed above the crankcase 11, a cylinder head 13 is disposed above the cylinder 12, and a head cover 14 is disposed above the cylinder head 13. The cylinder axis CL is slightly inclined forward so that the head 13 is positioned slightly forward of the crankcase 11. Here, “directed vertically” does not indicate only vertical, but also includes those tilted forward as in the embodiment.

  The seat rail 6 is connected to a rear support frame 6a that is connected to the pivot frame 7 and tilts backward. Further, the pivot frame 7 is supported so that the front end portion of the swing arm 55 that pivotally supports the rear wheel RW at the rear end portion is swingably supported, and a rear cushion is provided between both ends of the seat rail 6 and the swing arm 55. 58 are provided.

  A chain case 59 is provided along the swing arm 55 from the rear left side of the crankcase 11 to the rear end side of the swing arm 55. The chain case 59 has a sprocket and a chain spanned over the sprocket. The power of the engine 10 is transmitted to the rear wheel RW.

  The upper surface of the vehicle body is covered with a fuel tank 15, a seat 16, and the like. That is, the fuel tank 15 is mounted on the main frame 5 above the engine 10, and the seat 16 on which an occupant is seated is supported by the seat rail 6 and continuously disposed at the rear end portion of the fuel tank 15. Has been.

  A part of the side surface of the vehicle body is covered with a side cover 40. That is, from the rear edge of the lower edge of the fuel tank 15 to the rear part of the vehicle body along the lower edge of the seat 16, for example, a plurality of continuous side covers 40a, 40b, 40c (40) are covered.

  In FIG. 2, an intake pipe 42 of the intake device 38 is connected to the rear side of the cylinder head 13. The intake device 38 includes an air cleaner 48, a throttle body 41 connected to the air cleaner 48, an intake pipe 42 connecting the throttle body 41 and the cylinder head 13, a connecting tube 49 connecting the air cleaner 48 and the throttle body 41, and the like. Prepare. Here, referring also to FIG. 3, a throttle valve 45 is provided in the throttle body 41. The throttle valve 45 is rotated via a throttle drum 45d provided on the side surface of the throttle body 41 and a throttle wire 45w connected to the throttle drum 45d.

  On the other hand, an exhaust pipe 43 is connected to the front side of the cylinder head 13, extending to the front of the engine 10, extending downward, and extending backward through the engine 10. The exhaust pipe 43 is connected to an exhaust muffler 44 (see FIG. 1) disposed so as to extend rearward and rightward of the rear wheel RW. In the figure, reference numeral 51 denotes a battery, and reference numeral 52 denotes a fuel pump.

  The motorcycle 1 is provided with a canister 20 that collects evaporated fuel generated in the fuel tank 15. The canister 20 is formed in a cylindrical shape (see FIGS. 4 and 5). The canister 20 has, for example, an adsorption chamber in which activated carbon is accommodated so that the evaporated fuel is adsorbed by the activated carbon. It is configured.

  The canister 20 is attached directly below the main frame 5 on which the fuel tank 15 is placed, below the fuel tank 15 so that the axis P faces the vehicle width direction (see FIG. 1). Therefore, as shown in FIG. 2, when the fuel tank 15, the seat 16 and the side cover 40 are removed and the motorcycle 1 is viewed from the right side, a circular canister right side surface 20R can be seen. As shown in FIG. When the seat 16 and the side cover 40 are removed and the motorcycle 1 is viewed from the left, the left side 20L of the circular canister can be seen.

  The canister 20 includes a charge port 24 for introducing evaporated fuel generated in the fuel tank 15, a drain port 25 for discharging unnecessary substances in the canister 20, an intake port 26 for introducing outside air to the adsorbed fuel, and an outside air And a purge port 23 for discharging the fuel adsorbed in the canister 20 as a purge gas. The charge port 24 and the purge port 23 are arranged on the canister left side surface 20L, and the drain port 25 and the intake port 26 are arranged on the canister right side surface 20R.

  As shown in FIG. 3, the charge port 24 extends substantially vertically downward, and is connected to an evaporative fuel introduction pipe (not shown) connected to the fuel tank 15. The purge port 23 extends substantially vertically downward substantially parallel to the charge port 24, and is connected to a purge pipe (not shown) connected to the engine intake system.

  As shown in FIG. 2, the intake port 26 extends rearward and is connected to an intake pipe (not shown) that communicates with the atmosphere via the seat rail 6 and the like. The drain port 25 extends substantially downward in the vertical direction and opens downward.

  Since the purge pipe connected to the purge port 23 of the canister 20 is connected to the engine intake system, for example, when the throttle valve 45 is rotated in the opening direction, the inside of the purge pipe becomes negative pressure. Accordingly, outside air is introduced into the canister 20 through the intake port 26. When the adsorbed fuel is present in the canister 20, the fuel adsorbed in the canister 20 is sent as purge gas from the purge port 23 to the engine intake system via the purge pipe, and the purge gas is combusted in the engine 10.

  The canister 20 is attached via a stay 30 fixed to the main frame 5 as shown in FIGS. Specifically, the stay 30 is a plate-like member that extends in the vehicle front-rear direction so as to follow the inclination of the main frame 5, and is fixed to the left side surface 5 a of the main frame 5 via a fixing screw 81 or the like. . The canister 20 is supported below the stay 30 at a substantially middle position in the front-rear direction. Here, the support structure of the canister 20 is a structure attached by a canister holder 28 described later.

  The left mounting side surface 30Lw of the stay 30 is configured to hold the inclination sensor 37 in front of the canister 20 and hold the ECU 36 behind the canister 20 (see FIG. 3). The right mounting side surface 30Rw of the stay 30 is configured to hold the ignition coil 35 and the like (see FIG. 2).

  In FIG. 3, the mounting position of the canister 20 is in the vertical direction below the main frame 5 as described above. Further, at least a part of the canister 20 is at the height position HL2 of the cylinder head upper end 13ue (in FIG. 3). In the vehicle longitudinal direction, at least a part of the canister 20 is located behind the longitudinal position HL1 (vertical virtual line in FIG. 3) of the cylinder head rear end 13re. doing.

  Further, at least a part of the canister 20 is disposed within the vertical width of the head cover 14 that covers the cylinder head 13 in the vertical direction. That is, the lower end 20ue of the canister 20 is positioned below the height position HL3 (horizontal imaginary line in FIG. 3) of the head cover upper end 14ue, and at least the lower part of the canister 20 is located on the head cover 14 when viewed from the front of the vehicle. It is a hidden arrangement.

  Further, the canister 20 is disposed in front of the throttle valve 45. More specifically, the canister 20 is arranged between the longitudinal position SL of the throttle valve 45 (vertical phantom line in FIG. 3) and the longitudinal position YL of the cylinder 12 (vertical imaginary line in FIG. 3) in the vehicle longitudinal direction. Is located close to the engine 10. A fuel pump (52) is arranged on a straight line Q passing through the axis P of the canister 20 and the center of the throttle body 41 (more specifically, the throttle drum 45d) in a side view of the vehicle.

  Further, as shown in FIG. 1, the canister 20 of the present embodiment is disposed at a position where at least a part of the canister 20 overlaps the fuel tank 15 in a side view of the vehicle. Here, the fuel tank 15 has a shape in which both left and right ends extend below the main frame 5 so as to straddle the main frame 5. Specifically, as shown in FIG. 5, the canister 20 is arranged in a space surrounded by the tank bottom surface 15 b of the fuel tank 15 at the upper side and the left and right sides. When viewed from both sides, the substantially upper half of both sides of the canister (canister left side 20L and canister right side 20R) is covered by the lower end 15de of the fuel tank 15.

A side cover 40 (40a) is disposed at the lower end 15de of the fuel tank 15. The side cover 40 is provided on both the left and right sides of the vehicle so as to cover the lower half and the rear half of the canister left side 20L and the canister right side 20R.
Thus, the canister left side surface 20L and the canister right side surface 20R are covered with the fuel tank 15 and the side cover 40 so as to be hardly visible from both the left and right sides.

The above-described canister holder 28 will be described with reference to FIGS.
3 and 5, the canister holder 28 is substantially U-shaped so that the outer peripheral surface holding portion 28a that holds the case outer peripheral surface 20s of the canister 20 in a cylindrical shape and the left side surface 20L of the canister are restricted from the left outer side. Side surface holding portion 28 b and a flange portion 28 f locked to the stay 30. The flange portions 28f extend from the outer peripheral surface holding portion 28a in the vehicle front-rear direction along the left mounting side surface 30Lw of the stay 30, and are respectively formed with L-shaped engagement slits 28h. .

  On the other hand, on the left mounting side surface 30Lw of the canister holder 28 are formed L-shaped locking projections 31 that are respectively engaged with the pair of engagement slits 28h (see FIG. 3). Therefore, the canister holder 28 is attached to the stay 30 by fitting the engagement slit 28 h into the locking projection 31.

  Here, the canister holder 28 is formed of rubber, for example. Accordingly, the canister 20 is securely held and elastically supported by the case outer peripheral surface 20s and the canister left side surface 20L by the frictional force of the rubber.

  As described above, according to the motorcycle 1 of the present embodiment, the canister 20 is positioned at least partially behind the cylinder head rear end 13re of the engine 10 and above the cylinder head upper end 13ue in the vehicle side view. As described above, since it is arranged below the main frame 5, it is possible to avoid the entire canister 20 from receiving the traveling wind and to reduce the resistance caused by the traveling wind.

  Further, since at least a part of the canister 20 is disposed within the vertical width of the head cover 14 in the vertical direction, the canister 20 hides behind the head cover 14 and does not receive the traveling wind, thereby reducing the influence of the traveling wind. be able to.

  In addition, since at least a part of the canister 20 is arranged so as to overlap the fuel tank 15 when viewed from the side of the vehicle, the canister 20 can be hidden by the fuel tank 15 when viewed from the side of the vehicle, and the appearance can be designed. improves.

  In addition, since at least a part of the canister 20 is disposed at a position overlapping the side cover 40 that covers the vehicle side surface in a side view, the canister 20 can be hidden by the side cover 40 when viewed from the vehicle side surface. Will improve.

  In addition, since the canister 20 is elastically supported by the stay 30 attached to the lower part of the main frame 5, it is possible to reduce the influence of the vehicle body vibration on the canister 20 and enhance the canister protection function.

  In addition, since at least a part of the canister 20 is located between the throttle valve 45 and the cylinder 12 of the engine 10 in the front-rear direction, the canister 20 can receive heat from the cylinder 12 and can effectively evaporate the fuel in the canister. And the supply path of the vaporized fuel to the engine 10 can be shortened.

Note that the present invention is not limited to the forwardly inclined embodiment, and can be appropriately modified, improved, and the like. For example, in the forwardly inclined embodiment, a part of the side surface of the canister 20 is covered with the fuel tank 15 and the side cover 40, but the fuel tank 15 and the side cover 40 are not visible at all from the side surface. It may be.
Further, the stay 30 in the forward inclined embodiment is attached to the left side of the main frame 5, but may be structured to be attached to the right side. The stay 30 is formed in a plate shape, but is not limited to such a structure.
Furthermore, the stay 30 may be a resin, a light metal, or a sheet metal processed.

DESCRIPTION OF SYMBOLS 1 Motorcycle 2 Body frame 3 Head pipe 5 Main frame 10 Engine 13re Cylinder head rear end 13ue Cylinder head upper end 14 Head cover 15 Fuel tank 20 Canister 30 Stay 40 Side cover 45 Throttle valve CL Cylinder axis

Claims (7)

A main frame (5) extending rearward from the head pipe (3);
An engine (10) disposed below the main frame (5) and having a cylinder axis (CL) oriented vertically;
A fuel tank (15) provided above the engine (10);
A canister (20) for collecting evaporated fuel in the fuel tank (15);
In a motorcycle (1) comprising:
It said canister (20), such that at least a portion in the vehicle side view is located above the cylinder head rear end (13Re) rearward and the cylinder head upper than (13Ue) of the engine (10), and the axis is A motorcycle (1), which is disposed directly below the main frame (5) so as to face in the vehicle width direction . Motorcycle (1) according to claim 1,
The motorcycle (1), wherein at least a part of the canister (20) is disposed within a vertical width of the head cover (14) in the vertical direction. The motorcycle (1) according to claim 1 or 2,
The motorcycle (1), wherein at least a part of the canister (20) is disposed so as to overlap the fuel tank (15) in a side view of the vehicle. The motorcycle (1) according to any one of claims 1 to 3,
The motorcycle (1), wherein at least a part of the canister (20) is disposed so as to overlap with a side cover (40) covering the vehicle side surface in a side view of the vehicle. In the motorcycle (1) according to any one of claims 1 to 4,
The motorcycle (1), wherein the canister (20) is elastically supported by a stay (30) attached to a lower portion of the main frame (5). In the motorcycle (1) according to any one of claims 1 to 5,
The motorcycle (1), wherein at least a part of the canister (20) is located between a throttle valve (45) and a cylinder (12) of the engine (10) in the front-rear direction. In the motorcycle (1) according to any one of claims 1 to 6,
A motorcycle (1) characterized in that a fuel pump (52) is arranged on a straight line (Q) passing through the axis (P) of the canister (20) and the center of the throttle body (41) in a side view of the vehicle. .

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