Saddle-type vehicle

Abstract

To secure a sufficient space from an intake system component around a throttle body without increasing the size of a vehicle even when a canister is arranged behind an engine.SOLUTION: An evaporated fuel treatment device has an air cleaner arranged behind an engine (30) so that air is guided from the air cleaner through an intake passage (89) to the engine and evaporated fuel from a fuel tank is introduced into the intake passage. In the evaporated fuel treatment device, there are provided a throttle body (41) provided with the intake passage, and a canister (51) for recovering the evaporated fuel from the fuel tank. On one side in the vehicle width direction of the throttle body, there is provided a driving motor (44). On an end face on the other side in the vehicle width direction of the canister, there are provided a surge nipple connected via a surge hose (61) to the fuel tank, and a purge nipple connected via a purge hose (62) to the intake passage.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to Saddle-type vehicle Regarding. [Background technology]

[0002] A straddle-type vehicle in which an air cleaner and a canister are disposed behind the engine is known (see, for example, Patent Document 1). In the straddle-type vehicle described in Patent Document 1, an air cleaner is connected to the rear of the engine via a throttle body or the like, and a cylindrical canister is disposed in front of the air cleaner and below the throttle body. A surge hose extending from the fuel tank and a purge hose extending from the throttle body are connected to one end of the canister. Evaporated fuel from the fuel tank is adsorbed in the canister, and the evaporated fuel is introduced from the canister to the throttle body for re-combustion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-104837 A Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, electronically controlled throttle valves have been adopted in many throttle bodies, and a drive motor for driving the throttle valve has been added to the throttle body. This has resulted in the intake system components being arranged closely together around the throttle body, making it difficult to secure space for the canister. If a sufficient gap is not secured between the canister and the intake system components, the components may collide due to vehicle vibration, and if a gap is forcibly secured between the canister and the intake system components, the vehicle becomes larger.

[0005] The present invention has been made in consideration of the above points, and is capable of securing a sufficient gap between the canister and the intake system components around the throttle body without increasing the size of the vehicle, even when the canister is disposed behind the engine. Saddle-type vehicle The purpose is to provide. [Means for solving the problem]

[0006] One aspect of the present invention Saddle-type vehicle In the engine control system, an air cleaner is disposed behind the engine, and air is guided from the air cleaner through an intake passage to the engine, and evaporated fuel in a fuel tank is introduced into the intake passage. Saddle-type vehicle the engine comprises a throttle body in which the intake passage is formed, and a canister that recovers evaporated fuel from the fuel tank, a drive motor is provided on one side of the throttle body in a vehicle width direction, the canister extends in the vehicle width direction below the intake passage, and a surge nipple connected to the fuel tank via a surge hose and a purge nipple connected to the intake passage via a purge hose are provided on an end face of the canister on the other side in the vehicle width direction. A lower portion of the drive motor is located below the intake passage, an upper end of the canister is located above a lower end of the drive motor in a side view, and a front end of the canister is located forward of a rear end of the drive motor. This solves the above problem. Effect of the Invention

[0007] One aspect of the present invention Saddle-type vehicle According to the method, the drive motor is provided on one side in the vehicle width direction, and the surge nipple and purge nipple of the canister are provided on the other side in the vehicle width direction. The surge hose and purge hose do not come into contact with the drive motor due to vehicle vibration, and the throttle body and canister can be arranged compactly behind the engine. Because the surge hose and purge hose are separated from the drive motor, it is easy to ensure a gap between the canister and the intake system components around the throttle body without increasing the size of the vehicle. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a left side view of the saddle-ride type vehicle of the present embodiment. [Diagram 2]FIG. 2 is a perspective view of the engine periphery of the present embodiment as viewed from the right side. [Diagram 3] FIG. 2 is a perspective view of the engine periphery of the present embodiment as viewed from the left side. [Figure 4] FIG. 2 is a perspective view of the canister of the present embodiment as viewed from the right side. [Diagram 5] FIG. 2 is a perspective view of the canister according to the embodiment, as viewed from the left side. [Figure 6] FIG. 2 is a cross-sectional view of the cap and the canister of the present embodiment. [Figure 7] FIG. 2 is a perspective view of the cap of the present embodiment. [Figure 8] FIG. 2 is a right side view of the engine and its periphery according to the present embodiment. [Figure 9] FIG. 2 is a top view of the engine and the canister according to the embodiment. [Figure 10] FIG. 2 is a rear view of the engine and the canister of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In one embodiment of the present invention, an evaporative fuel treatment device has an air cleaner disposed behind an engine, air is guided from the air cleaner through an intake passage to the engine, and a canister collects evaporated fuel from a fuel tank and introduces it into the intake passage. An intake passage is formed in a throttle body, and a drive motor is provided on one side of the throttle body in the vehicle width direction. A canister extends in the vehicle width direction below the intake passage, and a surge nipple and a purge nipple are formed on an end face of the canister on the other side in the vehicle width direction. A fuel tank is connected to the surge nipple via a surge hose, and the intake passage is connected to the purge nipple via a purge hose. A drive motor is provided on one side in the vehicle width direction, and a surge nipple and a purge nipple of the canister are provided on the other side in the vehicle width direction. The surge hose and the purge hose do not come into contact with the drive motor due to vehicle vibration, and the throttle body and the canister can be compactly disposed behind the engine. Because the surge hose and purge hose are separated from the drive motor, the vehicle does not become larger, and it is easy to ensure clearance between the canister and the intake system components around the throttle body. EXAMPLES

[0010] The present embodiment will be described in detail below with reference to the accompanying drawings. Fig. 1 is a left side view of a saddle riding type vehicle according to the present embodiment. In the following drawings, the arrow FR indicates the front of the vehicle, the arrow RE indicates the rear of the vehicle, the arrow L indicates the left side of the vehicle, and the arrow R indicates the right side of the vehicle.

[0011] As shown in Fig. 1, the saddle-type vehicle 1 is configured by mounting an engine 30, an electrical system, and various other parts on a diamond-shaped body frame 10 formed of pipes and sheet metal. The body frame 10 has a pair of main frames 12 that branch off to the left and right from a head pipe 11 and extend rearward, and a pair of down frames 13 that branch off to the left and right from the head pipe 11 and extend downward. A rear portion of the engine 30 is supported by the pair of main frames 12, and a front portion of the engine 30 is supported by the pair of down frames 13. Supporting the engine 30 on the body frame 10 improves the rigidity of the entire vehicle.

[0012] The front portion of the main frame 12 forms a tank rail 14 located above the engine 30, and a fuel tank 21 is supported from below by the tank rail 14. The rear portion of the main frame 12 forms a body frame 15 located behind the engine 30, and a swing arm 22 is supported in a swingable manner in the lower half of the body frame 15. A seat rail 16 consisting of an upper rail 17 and a lower rail 18 is attached to the upper half of the body frame 15. A rider seat 23 and a pillion seat 24 are supported behind the fuel tank 21 on the upper portion of the upper rail 17.

[0013] A pair of front forks 25 are steerably supported on the head pipe 11 via a steering shaft (not shown), and a front wheel 26 is rotatably supported on the lower part of the front forks 25. The swing arm 22 extends rearward from the body frame 15, and a rear wheel 27 is rotatably supported on the rear end of the swing arm 22. An engine 30 is connected to the rear wheel 27 via a chain drive type transmission mechanism, and power from the engine 30 is transmitted to the rear wheel 27 via the transmission mechanism. In addition, a side stand 28 is provided on the lower part of the left side body frame 15 to tilt the vehicle to stand on its own.

[0014] Incidentally, in a vehicle model in which the air cleaner 38 is disposed behind the engine 30, the air cleaner 38 is connected to the engine 30 via a throttle body 41. If an electronically controlled throttle valve is used in the throttle body 41, a larger space must be secured for the throttle body 41 to accommodate the additional drive motor. Also, in order to dispose the canister 51, it is necessary to secure routes for installing the surge hose and the purge hose. Therefore, in this embodiment, the drive motor 44 is disposed on one side in the vehicle width direction, and routes for installing the hoses of the canister 51 are secured on the other side in the vehicle width direction, and the canister 51 is disposed behind the engine 30 (see FIG. 9).

[0015] The peripheral configuration of the engine will be described with reference to Figures 2 and 3. Figure 2 is a perspective view of the periphery of the engine of this embodiment as seen from the right side. Figure 3 is a perspective view of the periphery of the engine of this embodiment as seen from the left side.

[0016] 2 and 3, the engine 30 is a two-cylinder engine and has a crankcase 31 with an upper and lower split structure. A cylinder 32, a cylinder head 33, and a cylinder head cover 34 are attached to the upper part of the crankcase 31. A magneto cover 35 that covers a magneto (not shown) from the side is attached to the left side of the crankcase 31. A clutch cover 36 that covers a clutch (not shown) from the side is attached to the right side of the crankcase 31. A throttle body 41 is connected to the rear surface of the cylinder head 33 via a pair of intake pipes 37.

[0017] An air cleaner 38 (see FIG. 1) is connected to the upstream (rear) side of the throttle body 41. The air cleaner 38 is disposed between a pair of seat rails 16 (see FIG. 1) and is tilted diagonally downward toward the rear. The upstream sides of a pair of intake passages 89 are formed inside the throttle body 41, and the downstream sides of a pair of intake passages 89 are formed inside the pair of intake pipes 37. The pair of intake passages 89 are formed by the throttle body 41 and the pair of intake pipes 37, and air is introduced from the air cleaner 38 to a pair of intake ports of the cylinder head 33 through the pair of intake passages 89.

[0018] The throttle body 41 has a pair of cylindrical portions 42 that connect the pair of intake pipes 37 and a pair of outlet tubes (not shown) of the air cleaner 38. A pair of electronically controlled throttle valves 43 are arranged in an intake passage 89 of the pair of cylindrical portions 42. The pair of throttle valves 43 are attached to a shaft (not shown) that penetrates the pair of cylindrical portions 42, and a drive motor 44 is connected to the right end of this shaft. The pair of throttle valves 43 are driven to open and close by the drive motor 44, and the amount of intake air flowing from the air cleaner 38 to the cylinder head 33 is adjusted.

[0019] The drive motor 44 has a motor body 45 that outputs a drive force, and a gear case 46 that houses a transmission gear that transmits the output of the motor body 45 to the shaft. The motor body 45 is connected to the lower part of the right cylindrical part 42, and the gear case 46 is connected to the right side (one side in the vehicle width direction) of the right cylindrical part 42 and the motor body 45. The motor body 45 is located below the intake passage 89, and the lower end of the gear case 46 is located below the motor body 45. In this way, the right side of the throttle body 41 and the right side of the space below the throttle body 41 form spaces for arranging the gear case 46 and the motor body 45.

[0020] A purge pipe 47 having a U-shape in rear view is connected to the lower surfaces of the pair of cylindrical portions 42. A purge hose 62 extending from a canister 51 (described later) is connected to the purge pipe 47. A pair of injectors 48 are attached to the upper surfaces of the pair of cylindrical portions 42, and a delivery pipe 49 is connected to the pair of injectors 48. The pair of injectors 48 penetrate the cylindrical portions 42, and are inclined so as to face diagonally downward and forward. Fuel is supplied from the delivery pipe 49 to the pair of injectors 48, and the fuel is injected from the pair of injectors 48 toward a pair of intake ports (not shown) downstream of the pair of intake pipes 37.

[0021] A canister 51 that collects evaporated fuel in the fuel tank 21 (see FIG. 1) is disposed below the throttle body 41. A cap 81 is attached so as to cover the right end face (end face on one side) of the canister 51, and a surge hose 61 and a purge hose 62 are connected to the left end face (end face on the other side) of the canister 51. The canister 51 is connected to the fuel tank 21 via the surge hose 61, and the canister 51 is connected to the purge pipe 47 via the purge hose 62. The evaporated fuel in the fuel tank 21 is collected into the canister 51 through the surge hose 61, and is introduced into the intake passage 89 through the purge hose 62 and the purge pipe 47.

[0022] The purge hose 62 has a first purge hose 63 and a second purge hose 64. The first purge hose 63 connects the canister 51 and a purge valve 71, and the second purge hose 64 connects the purge valve 71 and a purge pipe 47. The flow rate of evaporated fuel purged from the canister 51 to the intake passage 89 of the throttle valve 43 is adjusted by opening and closing the purge valve 71. A rubber band 57 is attached to the outer circumferential surface of the canister 51, and a canister bracket 65 is inserted into the rubber band 57. The canister 51 is fixed in a floating state to a frame member (not shown) via the canister bracket 65.

[0023] The canister will be described with reference to Figures 4 to 7. Figure 4 is a perspective view of the canister of this embodiment, seen from the right side. Figure 5 is a perspective view of the canister of this embodiment, seen from the left side. Figure 6 is a cross-sectional view of the cap and canister of this embodiment. Figure 7 is a perspective view of the cap of this embodiment. Note that Figure 4(A) shows a state in which the cap is attached to the canister, and Figure 4(B) shows a state in which the cap is removed from the canister.

[0024] As shown in Figures 4 and 5, the canister 51 has a resin canister case 52 in which an adsorption chamber is formed. Activated carbon or the like capable of temporarily adsorbing evaporated fuel is accommodated in the adsorption chamber of the canister case 52. An atmosphere vent nipple 53 communicating with the atmosphere and a drain nipple 54 for discharging moisture and fuel in the adsorption chamber are formed on the right end face (one end face) of the canister case 52. The atmosphere vent nipple 53 is located in the center of the end face, and the drain nipple 54 is located below the atmosphere vent nipple 53. A rubber cap 81 is attached to the canister case 52 so as to cover the right end face.

[0025] A surge nipple 55 to which a surge hose 61 (see FIG. 3) is connected and a purge nipple 56 to which a purge hose 62 (see FIG. 3) is connected are formed on the left end surface (the end surface on the other side) of the canister case 52. The fuel tank 21 (see FIG. 1) is connected to the surge nipple 55 via the surge hose 61, and the intake passage 89 (see FIG. 3) is connected to the purge nipple 56 via the purge hose 62 (see FIG. 3). The surge nipple 55 is located in the center of the end surface, and the purge nipple 56 is located above the surge nipple 55. In this way, a plurality of nipples are formed on both the left and right ends of the canister case 52.

[0026] A rubber band 57 is attached to the center in the longitudinal direction on the outer circumferential surface of the canister case 52. The upper and lower parts of the rubber band 57 form mounting sections 58 to which the canister bracket 65 is attached, and a flat hole is formed in the mounting section 58. A recess 59 is formed in the part protruding to the right from the upper mounting section 58, and a protrusion 82 of a cap 81 fits into this recess 59 to position the cap 81 in the circumferential direction relative to the rubber band 57. Furthermore, the pressing force of the rubber band 57 tightly contacts the rubber band 57 and the canister case 52, preventing the rubber band 57 from shifting in the circumferential direction relative to the canister case 52.

[0027] The canister bracket 65 has a fixed bracket 66 that is fixed to the frame member, and a C-shaped bracket 69 that is attached to the rubber band 57. The fixed bracket 66 has a right-side lower piece 67 that is bent downward, and a left-side upper piece 68 that is bent upward. The middle part of the C-shaped bracket 69 is joined to the lower piece 67 of the fixed bracket 66, and both ends of the C-shaped bracket 69 are inserted into flat holes in the upper and lower mounting parts 58 of the rubber band 57. Engine vibrations are transmitted from the frame member to the canister bracket 65, but the rubber band 57 absorbs the engine vibrations so that they are less likely to be transmitted to the canister 51.

[0028] A drive unit 72 of a purge valve 71 is fixed to the upper piece 68 of the fixed bracket 66. The purge valve 71 is positioned to the left of the rubber band 57, and the purge valve 71 and the purge nipple 56 are brought close to each other. A valve case 73 is provided on the left side of the drive unit 72, and a valve (not shown) is housed inside the valve case 73. The drive unit 72 is composed of a solenoid or a motor, etc., and the valve inside the valve case 73 is driven by the drive unit 72. A connector 74 is provided on the front of the drive unit 72, and a control unit (not shown) is connected to the connector 74 via a cable (not shown).

[0029] An inlet nipple 75 is formed at the tip end side of the valve case 73, and a discharge nipple 76 is formed at the base end side of the valve case 73. The purge nipple 56 of the canister 51 is connected to the inlet nipple 75 via a first purge hose 63, and the discharge nipple 76 is connected to the purge pipe 47 (see FIG. 3) of the throttle body 41 via a second purge hose 64. The inlet nipple 75 and the discharge nipple 76 extend forward from the valve case 73 and are located close to the purge nipple 56 and the purge pipe 47. This allows the first and second purge hoses 63, 64 to be formed short.

[0030] 6 and 7, a dome-shaped cap 81 is attached to the right end face side of the canister case 52, and the cap 81 covers the atmosphere vent nipple 53 and the drain nipple 54. The top portion of the cap 81 faces the atmosphere vent nipple 53, and the portion of the cap 81 below the top portion faces the drain nipple 54. A pair of notches 83 are formed on the outer periphery of the cap 81, which makes the outer periphery of the cap 81 easier to deform, improving the fitment of the cap 81 to the canister case 52. The above-mentioned positioning protrusion 82 is formed on the upper outer periphery of the cap 81.

[0031] A U-shaped wall (perimeter wall) 84 is formed on the inner surface of the cap 81, surrounding the periphery except for the area below the atmosphere release nipple 53. An insertion hole (sealing portion) 85 is formed below the U-shaped wall 84, covering the outlet of the drain nipple 54. By sealing the drain nipple 54 with the insertion hole 85, fuel is less likely to leak from the outlet of the drain nipple 54, preventing contamination of parts. In a typical canister, fuel that leaks from the canister case is guided through a drain hose to a position where the parts will not be contaminated, but because the canister 51 of this embodiment is equipped with the cap 81, a drain hose is not necessary, reducing the number of parts.

[0032] An opening 86 that connects the inside of the cap 81 to the atmosphere is formed below the insertion hole 85. The opening 86 is formed in an arc shape that follows the outer periphery of the cap 81. Since the inside of the atmosphere vent nipple 53 connects to the inside of the cap 81 through the open portion below the U-shaped wall 84, the inside of the atmosphere vent nipple 53 connects to the atmosphere through the opening 86. Even if the atmosphere vent nipple 53 and the drain nipple 54 are hidden by the cap 81 to improve appearance, the performance of the canister 51 is not hindered by the cap 81 because the inside of the atmosphere vent nipple 53 connects to the atmosphere through the opening 86.

[0033] Since the atmosphere vent nipple 53 is in communication with the atmosphere, various measures have been taken with the cap 81 to make it difficult for foreign matter such as water or dust to get into the atmosphere vent nipple 53. For example, an opening 86 is located closer to the right end surface of the canister case 52 than an insertion opening 87 of the insertion hole 85 (see FIG. 6 in particular). In addition, a protruding wall 88 that is larger than the length of the opening 86 and the width of the U-shaped wall 84 is formed at the upper part of the insertion hole 85. The protruding wall 88 and the base end portion of the drain nipple 54 are located between the opening 86 and the atmosphere vent nipple 53, thereby preventing foreign matter from getting into the atmosphere vent nipple 53 from the opening 86.

[0034] Furthermore, a pair of notches 83 on the outer periphery of the cap 81 are formed on the sides of the U-shaped wall 84. Even if foreign matter enters the cap 81 through the pair of notches 83, the U-shaped wall 84 surrounds the atmosphere vent nipple 53 except for the lower part, so that the intrusion of foreign matter into the atmosphere vent nipple 53 through the pair of notches 83 is suppressed. At this time, the open surface (lower surface) of the U-shaped wall 84 is positioned lower than the lower ends of the pair of notches 83, so that direct intrusion of foreign matter into the atmosphere vent nipple 53 through the pair of notches 83 is suppressed. By attaching the cap 81 to the canister 51, the location of the canister 51 is not limited by appearance or the ease with which foreign matter can enter.

[0035] The layout of the canister will be described with reference to Figures 8 to 10. Figure 8 is a right side view of the engine and its periphery in this embodiment. Figure 9 is a top view of the engine and the canister in this embodiment. Figure 10 is a rear view of the engine and the canister in this embodiment.

[0036] As shown in Figure 8, the cylinder axis of engine 30 is vertical, and crankcase 31 at the bottom of engine 30 extends rearward. A cylinder head 33 is supported on tank rail 14 of main frame 12, and crankcase 31 is supported on body frame 15 of main frame 12. A throttle body 41 and a canister 51 are disposed in the space behind the cylinder surrounded by engine 30 and main frame 12 in side view. The throttle body 41 is disposed toward the front at the top of the space behind the cylinder, and the canister 51 is disposed toward the rear at the bottom of this space.

[0037] The drive motor 44 of the throttle body 41 extends obliquely downward and rearward, and the cap 81 of the canister 51 is disposed in a space surrounded by the drive motor 44, the main frame 12, and the crankcase 31. In this state, in a side view, the upper end P1 of the canister 51 is located above the lower end P2 of the drive motor 44, and the front end P3 of the canister 51 is located forward of the rear end P4 of the drive motor 44. The canister 51 is disposed close to the drive motor 44 in the up-down and front-rear directions, and the throttle body 41 and the canister 51 are disposed compactly, thereby preventing the vehicle from becoming large in size.

[0038] Also, part of the canister 51, i.e., part of the cap 81, overlaps the crankcase 31 and the clutch cover 36. The gap between the cap 81 and the crankcase 31 is narrowed to the point that they come into contact due to engine vibration, but the gap between the cap 81 and the drive motor 44 is ensured to be small enough that they do not come into contact even due to engine vibration. Even if the canister 51 comes into contact with the crankcase 31 due to engine vibration, the rubber cap 81 protects the canister 51 from impact. The canister 51 is brought close to the crankcase 31 in the vertical direction, and is compactly arranged above the crankcase 31, preventing the vehicle from becoming larger in size.

[0039] 9, in top view, the right end face (one end face) of the canister 51 is located inside the drive motor 44 in the vehicle width direction, and the overall length of the canister 51 is shorter than the overall length of the throttle body 41. The canister 51 is brought closer to the drive motor 44 in the vehicle width direction, and the drive motor 44 and the canister 51 are compactly arranged, thereby preventing the vehicle from becoming larger. The center position O of the canister 51 in the longitudinal direction is biased to the right of the center plane C of the engine 30, and space is secured to the left of the canister 51 for arranging the surge hose 61 and the purge hose 62.

[0040] As shown in Figures 9 and 10, the surge hose 61 extends upward from the left end surface of the canister 51, passing along the left side of the throttle body 41, and then extends rearward toward the exhaust port of the fuel tank 21 (see Figure 1). The first purge hose 63 extends from the left end surface of the canister 51 toward a purge valve 71 at the top of the canister 51. At this time, the first purge hose 63 is contained within the front-to-rear width W of the canister 51 in a top view. The second purge hose 64 extends forward and backward from the purge valve 71 toward the purge pipe 47 of the throttle body 41. In a side view, the second purge hose 64 overlaps the drive motor 44 (see Figure 8).

[0041] In this way, the drive motor 44 of the throttle body 41 is provided to the right of the center plane C of the engine 30, and the installation routes for the surge hose 61 and the purge hose 62 are secured to the left of the center plane C of the engine 30. Since the surge hose 61 and the purge hose 62 do not come into contact with the drive motor 44 due to vehicle vibration, the canister 51 is brought close to the drive motor 44, preventing the vehicle from becoming larger. The installation routes for the surge hose 61 and the purge hose 62 are not obstructed by the drive motor 44, and the surge hose 61 and the purge hose 62 extending from the canister 51 can be shortened.

[0042] In rear view, an atmosphere vent nipple 53 on the right end face of the canister 51 is located below the drive motor 44. More specifically, the upper part of the canister 51 overlaps with the motor body 45, and the atmosphere vent nipple 53 is located below the gear case 46 (see FIG. 10 in particular). The tip of the atmosphere vent nipple 53 is located further inward than the outer end of the gear case 46. In addition, a drain nipple 54 (see FIG. 4(B)) is also formed on the right end face of the canister 51. Since no hoses are connected to the atmosphere vent nipple 53 and the drain nipple 54, the canister 51 is brought close to the drive motor 44 with a gap therebetween that is large enough to prevent the drive motor 44 and the canister 51 from coming into contact with each other.

[0043] The cap 81 of the canister 51 is located on the opposite side to the left side stand 28 (see FIG. 1). Because the side stand 28 allows the vehicle to stand on its own with the vehicle tilted to the left, the left end face of the canister 51 faces downward, making the surge hose 61 and the surge hose 61 less noticeable. The right end face of the canister 51 faces upward, but the atmosphere vent nipple 53 on the right end face of the canister 51 is covered by the cap 81, and the deterioration of the appearance due to the exposure of the atmosphere vent nipple 53 is suppressed. The main frame 12 is located above the cap 81, and the cap 81 itself is covered from above by the main frame 12, making the cap 81 less noticeable and suppressing the deterioration of the vehicle's appearance.

[0044] As described above, according to this embodiment, the drive motor 44 is provided on the right side in the vehicle width direction, and the surge nipple 55 and purge nipple 56 of the canister 51 are provided on the left side in the vehicle width direction. The surge hose 61 and purge hose 62 do not come into contact with the drive motor 44 due to vehicle vibration, and the throttle body 41 and canister 51 can be arranged compactly behind the engine 30. Because the surge hose 61 and purge hose 62 are separated from the drive motor 44, it is easy to ensure a gap between the canister 51 and the intake system components around the throttle body 41 without increasing the size of the vehicle.

[0045] In this embodiment, a two-cylinder engine is exemplified as the engine, but the type of engine is not particularly limited.

[0046] In addition, in this embodiment, the surge nipple and the purge nipple are formed on the left side of the canister, and the drive motor is provided on the right side of the throttle body, but the surge nipple and the purge nipple may be formed on the right side of the canister, and the drive motor may be provided on the left side of the throttle body.

[0047] In addition, in this embodiment, the atmosphere vent nipple and the drain nipple are formed on the right side of the canister, but the atmosphere vent nipple and the drain nipple may be formed on the left side of the canister. The canister does not necessarily have to be formed with a drain nipple.

[0048] In this embodiment, the positional relationship between the canister and the drive motor is not particularly limited as long as a gap is provided between them so that they do not come into contact with each other.

[0049] In addition, in this embodiment, the purge hose is connected to the purge pipe of the throttle body, but the purge hose may be connected to the intake passage. For example, the purge hose may be directly connected to the intake passage of the throttle body, or the purge hose may be connected to the intake passage of the intake pipe.

[0050] The fuel vapor treatment device is not limited to the illustrated saddle-ride type vehicle, and may be used in other types of saddle-ride type vehicles. A saddle-ride type vehicle is not limited to vehicles in general on which a rider sits astride a seat, but also includes small scooter-type vehicles on which a rider does not sit astride a seat.

[0051] As described above, the evaporated fuel treatment device of this embodiment is an evaporated fuel treatment device in which the air cleaner (38) is disposed behind the engine (30), air is guided from the air cleaner through the intake passage (89) to the engine, and evaporated fuel in the fuel tank (21) is introduced into the intake passage, the device includes a throttle body (41) having an intake passage formed therein, and a canister (51) for recovering evaporated fuel in the fuel tank, a drive motor (44) is provided on one side of the throttle body in the vehicle width direction, the canister extends in the vehicle width direction below the intake passage, and a surge nipple (55) connected to the fuel tank via a surge hose (61) and a purge nipple (56) connected to the intake passage via a purge hose (62) are provided on the end face of the canister on the other side in the vehicle width direction. According to this configuration, the drive motor is provided on one side in the vehicle width direction, and the surge nipple and purge nipple of the canister are provided on the other side in the vehicle width direction. The surge hose and purge hose do not come into contact with the drive motor due to vehicle vibration, and the throttle body and canister can be arranged compactly behind the engine. Because the surge hose and purge hose are separated from the drive motor, it is easy to ensure a gap between the canister and the intake system parts around the throttle body without increasing the size of the vehicle.

[0052] In the fuel vapor treatment device of this embodiment, the lower part of the drive motor is located below the intake passage, the upper end of the canister is located above the lower end of the drive motor in a side view, and the front end of the canister is located forward of the rear end of the drive motor. With this configuration, the canister can be brought closer to the drive motor in both the vertical and longitudinal directions, preventing the vehicle from becoming larger.

[0053] In the fuel vapor treatment device of this embodiment, one end face of the canister in the vehicle width direction is located on the inner side of the drive motor in the vehicle width direction in a top view. With this configuration, the canister can be brought closer to the drive motor in the vehicle width direction, thereby preventing the vehicle from becoming large in size.

[0054] In the evaporated fuel treatment device of this embodiment, an atmosphere vent nipple (53) is provided on one end face of the canister in the vehicle width direction, and the atmosphere vent nipple is located below the drive motor in a rear view. With this configuration, by providing the atmosphere vent nipple, which does not require a hose connection, on the drive motor side, the canister can be brought closer to the drive motor, preventing the vehicle from becoming larger.

[0055] In the evaporated fuel treatment device of this embodiment, the drive motor has a motor body (45) that outputs drive force, and a gear case (46) connected to one side of the motor body in the vehicle width direction, the motor body is located below the intake passage, the lower end of the gear case is located below the motor body, the upper part of the canister overlaps with the motor body in a rear view, and the atmosphere vent nipple is located below the gear case. With this configuration, by positioning the atmosphere vent nipple below the gear case, the canister can be brought closer to the drive motor, preventing the vehicle from becoming larger.

[0056] In the evaporated fuel treatment device of this embodiment, a purge valve (71) is provided above the canister on the other side in the vehicle width direction, and a purge hose is connected from the purge nipple to the intake passage via the purge valve, and the purge hose overlaps the drive motor in a side view. With this configuration, a route for the purge hose is secured on the other side in the vehicle width direction, and the purge hose and the drive motor do not come into contact with each other. This allows the canister to be brought closer to the drive motor, preventing the vehicle from becoming larger. In addition, the route for the purge hose is not obstructed by the drive motor, and the purge nipple and the intake passage can be connected by a short purge hose.

[0057] Although the present embodiment has been described, other embodiments may be made by combining the above-described embodiments and modifications in whole or in part.

[0058] In addition, the technology of the present invention is not limited to the above examples, and may be modified, substituted, or altered in various ways without departing from the spirit of the technical idea. Furthermore, if the technical idea can be realized in a different way due to the progress of technology or a different technology derived therefrom, the invention may be implemented using that method. Therefore, the claims cover all embodiments that may be included within the scope of the technical idea. [Explanation of symbols]

[0059] 21: Fuel tank 30: Engine 38: Air cleaner 41: Throttle body 44: Drive motor 45: Motor body 46: Gear case 51: Canister 53: Atmospheric release nipple 54: Drain nipple 55: Surge nipple 56: Purging nipple 61: Surge hose 62: Purge hose 71: Purge valve 89: Intake passage

Claims

1. A saddle-type vehicle in which an air cleaner is disposed behind an engine, air is introduced from the air cleaner through an intake passage to the engine, and evaporated fuel in a fuel tank is introduced into the intake passage, a throttle body in which the intake passage is formed; a canister for recovering evaporated fuel from the fuel tank, A drive motor is provided on one side of the throttle body in the vehicle width direction, the canister extends in a vehicle width direction below the intake passage, and a surge nipple connected to the fuel tank via a surge hose and a purge nipple connected to the intake passage via a purge hose are provided on an end face of the canister on the other side in the vehicle width direction, a lower portion of the drive motor is located below the intake passage, 1. A saddle-type vehicle, wherein an upper end of the canister is located higher than a lower end of the drive motor, and a front end of the canister is located forward of a rear end of the drive motor, in a side view.

2. A saddle-type vehicle in which an air cleaner is disposed behind an engine, air is introduced from the air cleaner through an intake passage to the engine, and evaporated fuel in a fuel tank is introduced into the intake passage, a throttle body in which the intake passage is formed; a canister for recovering evaporated fuel from the fuel tank, A drive motor is provided on one side of the throttle body in the vehicle width direction, the canister extends in a vehicle width direction below the intake passage, and a surge nipple connected to the fuel tank via a surge hose and a purge nipple connected to the intake passage via a purge hose are provided on an end face of the canister on the other side in the vehicle width direction, A saddle-type vehicle, wherein one end face of the canister in a vehicle width direction is located more inward in the vehicle width direction than the drive motor when viewed from above.

3. An atmosphere vent nipple is provided on one end face of the canister in the vehicle width direction, 3. The straddle-type vehicle according to claim 2, wherein the atmosphere vent nipple is located below the drive motor when viewed from the rear.

4. The drive motor has a motor body that outputs a drive force, and a gear case that is connected to one side of the motor body in a vehicle width direction, the motor body is located below the intake passage, and a lower end of the gear case is located below the motor body, 4. The straddle-type vehicle according to claim 3, wherein an upper portion of the canister overlaps with the motor body in a rear view, and the atmosphere vent nipple is located lower than the gear case.

5. A saddle-type vehicle in which an air cleaner is disposed behind an engine, air is introduced from the air cleaner through an intake passage to the engine, and evaporated fuel in a fuel tank is introduced into the intake passage, a throttle body in which the intake passage is formed; a canister for recovering evaporated fuel from the fuel tank, A drive motor is provided on one side of the throttle body in the vehicle width direction, the canister extends in a vehicle width direction below the intake passage, and a surge nipple connected to the fuel tank via a surge hose and a purge nipple connected to the intake passage via a purge hose are provided on an end face of the canister on the other side in the vehicle width direction, a purge valve is provided above the canister on the other side in the vehicle width direction, the purge hose is connected from the purge nipple to the intake passage via the purge valve, 4. A saddle-type vehicle, wherein the purge hose overlaps with the drive motor in a side view.

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