JP2006213250A - Motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent high temperatures in a fuel tank, by actively introducing a travel wind to an objective space by an outside air guiding duct. <P>SOLUTION: This motorcycle has a car body frame 20 having left and right main frames 22 extending backward from a head pipe 21, an engine 3 positioned on the lower side between the left and right main frames and suspended by an engine suspension frame 23 of the car body frame, and the fuel tank 7 arranged on the upper side between the left and right main frames; and is provided with the outside air guiding duct 80 having the front end 81 opened in a position for introducing the travel wind and having the rear end 82 opened toward a space N surrounded by the main frames, the engine and the fuel tank. A wind exhaust passage 90 for making wind introduced to this space blow through further backward, is secured on the rear side of the space N surrounded by the main frames, the engine and the fuel tank. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorcycle of a type in which an engine, a fuel tank, and other parts are densely arranged at the center of a vehicle body on which a driver rides, such as a sports bike, and it is difficult to ensure ventilation inside. .

  Sports-type motorcycles often have a structure in which an engine is arranged at the center in the longitudinal direction of the vehicle body, a radiator is arranged in front of the motorcycle, a fuel tank is arranged above the engine, and these are supported by a vehicle body frame. . The body frame of a normal sports-type motorcycle has left and right main frames extending rearward from the head pipe. The engine is suspended between the main frames, and between the left and right main frames. A fuel tank is arranged on the upper side. Further, a front cowl is often disposed at the front of the vehicle body so as to cover the side surface from the front surface of the vehicle body (see, for example, Patent Documents 1, 2, and 3).

Japanese Patent Laid-Open No. 3-64615 JP 2002-302083 A JP 2003-72625 A

  By the way, when a high-power engine is installed, the handling of exhaust heat becomes a problem, but in the above-mentioned motorcycle, it is discharged from the cylinder of the engine into a narrow space surrounded by the main frame, the engine, and the fuel tank. There was a problem that the heat generated was easy to accumulate. Conventionally, in consideration of heat damage to passengers, hot air from the engine is usually confined in a space surrounded by the engine, frame, and tank by filling the gap, but heat accumulates. If the temperature is too high, there is a problem that even if a heat insulating material is interposed, heat is directed toward the fuel tank, and the fuel tank becomes high temperature.

  In consideration of the above circumstances, an object of the present invention is to provide a motorcycle that can solve the problem that vehicle-mounted components such as fuel tanks become hot.

  The invention of claim 1 is a motorcycle comprising a body frame, an engine suspended on the body frame, and a vehicle-mounted component disposed at a position above the body frame, A space covered with the engine and the vehicle-mounted component is formed, and an outside air induction duct having a front end opening that opens to a position where traveling wind is introduced and a rear end opening that opens to the space is provided. It is characterized by.

  The invention of claim 2 is the motorcycle according to claim 1, wherein the motorcycle is communicated with the space covered by the body frame, the engine, and the vehicle-mounted component, and the wind introduced into the space is moved rearward. An exhaust passage that blows through and exhausts air outside the space is provided.

  A third aspect of the invention is the motorcycle according to the first or second aspect, wherein the vehicle-mounted component is a fuel tank.

  The invention of claim 4 is the motorcycle according to any one of claims 1 to 3, wherein the body frame includes a head pipe and a pair of left and right main frames extending rearward from the head pipe, The engine is suspended at a lower position between the pair of left and right main frames, and the vehicle-mounted component is disposed at an upper position between the pair of left and right main frames.

  A fifth aspect of the present invention is the motorcycle according to the second aspect, wherein the exhaust passage includes a rear frame coupled to a rear end of the vehicle body frame, and a lower position than a coupling position of the rear frame. It is characterized in that it is formed between the rear end of the vehicle body frame at a position and a swing arm that is pivotally connected and supported via a pivot shaft.

  A sixth aspect of the present invention is the motorcycle according to any one of the first to fifth aspects, wherein a rear end of the outside air induction duct is opened toward a bottom portion of the vehicle-mounted component.

  A seventh aspect of the invention is the motorcycle according to any one of the first to sixth aspects, wherein the outside air induction duct has a shape in which a flow path area is narrowed toward a rear end. .

  The invention according to claim 8 is the motorcycle according to any one of claims 1 to 7, comprising a front cowl that covers from the front part of the vehicle body to the side part of the vehicle body, and a running wind inlet is opened on a side surface of the front cowl. The traveling wind inlet is communicated with a front end opening of the outside air guiding duct, and the outside air guiding duct is disposed along the inside of the side surface of the front cowl.

  A ninth aspect of the present invention is the motorcycle according to the eighth aspect, wherein the outside air introduction duct is disposed at a front portion thereof and extends along the front cowl and a rear portion thereof. It is formed with the rear cylindrical part which faced the width direction center side.

  A tenth aspect of the invention is the motorcycle according to the ninth aspect of the invention, wherein the outside air induction duct is configured by a blow molded product.

  The invention of claim 11 is the motorcycle according to any one of claims 8 to 10, further comprising a radiator disposed in front of the engine, wherein the traveling air intake is below the lower end of the radiator It is characterized by being arranged in.

  A twelfth aspect of the invention is the motorcycle according to the eleventh aspect of the invention, wherein an exhaust port through which the traveling wind that has passed through the radiator is discharged is opened on a side surface of the front cowl above the traveling wind intake. It is characterized by.

  A thirteenth aspect of the present invention is the motorcycle according to any one of the eighth to twelfth aspects, wherein a bulging portion is formed on a side surface of the front cowl, and the traveling wind intake is provided in the bulging portion. It is characterized by being.

  A fourteenth aspect of the invention is the motorcycle according to the fourth aspect of the invention, comprising an engine suspension frame attached to the pair of left and right main frames, and an auxiliary machine attached to the engine and protruding laterally. The outside air induction duct is disposed between the engine suspension frame and the auxiliary machine.

  A fifteenth aspect of the invention is the motorcycle according to the eighth aspect of the invention, wherein a guide member that can be opened and closed is provided at the traveling wind inlet, and the guide member is closed when the traveling wind inlet is closed. A guide portion for guiding the traveling wind to the flow along the outer side surface of the front cowl is provided.

  A sixteenth aspect of the present invention is the motorcycle according to any one of the first to fifteenth aspects, comprising a seat on which a rider is seated, and the outside air induction duct is rearward toward the side portion of the seat as viewed from above. It is characterized by having a discharge hole for discharging the traveling wind.

  A seventeenth aspect of the invention is the motorcycle according to the fifth aspect, wherein an electrical component is attached to the rear frame.

  According to the first aspect of the present invention, the traveling air can be actively guided to the target space by the outside air induction duct, so that the heat accumulated in the space can be discharged to the outside, and the surrounding vehicle-mounted components are High temperature can be prevented. In addition, by actively flowing the traveling wind into the vehicle body, it is possible to obtain a cooling effect for components such as a frame disposed along the flow of the traveling wind and electrical components mounted on the frame.

  According to the invention of claim 2, the heat accumulated in the space can be actively discharged toward the rear of the vehicle by the exhaust passage. Therefore, the effect of claim 1 can be further enhanced.

  According to invention of Claim 3, it can prevent that a fuel tank heats up.

  According to the fourth aspect of the present invention, since the traveling wind is positively introduced into the space surrounded by the left and right main frames, the engine, and the vehicle-mounted component, it is possible to prevent the vehicle-mounted component from being heated particularly due to waste heat of the engine Can do.

  According to the invention of claim 5, the air accumulated in the space can be exhausted rearward through the space formed by the rear frame and the swing arm. Therefore, the running wind is improved and the cooling performance is further improved.

  According to the sixth aspect of the present invention, cold outside air (running wind) can be directly applied to the bottom of the vehicle-mounted component (for example, fuel tank), and the cooling effect of the vehicle-mounted component can be further enhanced.

  According to invention of Claim 7, since the exit (rear end) which blows off the driving | running | winding wind of an external air induction duct was restrict | squeezed, it can apply to the target location, speeding up the flow velocity. Therefore, a pinpoint cooling effect can be obtained.

  According to the eighth aspect of the present invention, the traveling wind (outside air) introduced from the traveling wind inlet opening in the side surface of the front cowl can be reliably guided to the desired space through the outside air guiding duct.

  According to the ninth aspect of the present invention, since the front cylindrical portion and the rear cylindrical portion are provided in the outside air induction duct, the traveling wind can be reliably guided into the vehicle body via the cylindrical passage.

  According to invention of Claim 10, a front cylindrical part and a rear cylindrical part can be shape | molded easily.

  According to the invention of claim 11, the traveling wind intake can be provided without difficulty while avoiding the position of the radiator.

  According to the twelfth aspect of the present invention, it is possible to secure a passage for traveling wind that passes through the radiator.

  According to the invention of claim 13, traveling wind coming from the front can be efficiently taken into the traveling wind intake.

  According to the invention of the fourteenth aspect, since the outside air induction duct is disposed using the empty space between the engine suspension frame and the auxiliary machine, the vehicle width dimension of the front cowl can be increased by providing the outside air induction duct. It can be prevented from increasing.

  According to the fifteenth aspect of the present invention, the traveling wind inlet can be closed when not needed, and in this state, the traveling wind can be guided to the flow along the outer surface of the front cowl. Therefore, the running resistance can be reduced as compared with the case where the running wind inlet is opened.

  According to the sixteenth aspect of the present invention, the traveling wind introduced through the outside air induction duct can be discharged toward the rider's knee, and the heat before the rider's knee can be reduced.

  According to the invention of claim 17, the temperature of the electrical component attached to the rear frame can be lowered.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a left side view showing the overall configuration of the motorcycle according to the embodiment, FIG. 2 is a right side view showing the overall configuration, and FIG. 3 is a diagram showing a point portion of the motorcycle taken out and shown along with a wind flow (arrow F). FIG. 4 is a front view showing the overall configuration of the front cowl, FIG. 5 is a side view thereof, FIG. 6 is a partial perspective view of the point portion of the motorcycle, FIG. 7 is a horizontal sectional view of the point portion, and FIG. The perspective view of the same point part seen from another angle, FIG. 9 is the perspective view of the same point part which shows the state which removed the middle cowl.

  10 is a perspective view showing the components of the outside air induction duct, FIG. 11 is a cross-sectional view of the outside air induction duct when the components of FIG. 10 are attached to the front cowl, and FIG. FIG. 13 is a perspective view showing another example of the component parts, and FIG. 13 is a cross-sectional view when the component parts of FIG. 12 are attached to the front cowl to form an outside air induction duct. 14 is a front view of only the under cowl constituting the front cowl lower, FIG. 15 is a side view thereof, FIG. 16 is a side view of the upper cowl constituting the front cowl lower, and FIG. 17 is a middle constituting the front cowl lower. It is a side view of a cowl.

  As shown in FIGS. 1 and 2, the motorcycle includes a body frame 20, a front wheel 1, a rear wheel 2, an engine 3, a radiator 4, a front fork 5, a bar handle 6, a fuel tank 7, an air cleaner 8, and a fuel injection device. 9, a pivot shaft 10, a rear frame 11, a swing arm 12, a power transmission device 13, a seat 14, a rear suspension 15, an exhaust pipe 16, a muffler 17, a front cowl 50, and the like.

  The vehicle body frame 20 has a pair of left and right main frames 22 extending obliquely downward and rearward from a head pipe 21 at the front end. The rear frame 11 is connected to the rear of the main frame 22 and pivoted to the lower side. A swing arm 12 is connected via a shaft 10 so as to be swingable in the vertical direction. The rear wheel 2 is supported at the rear end of the swing arm 12, and a rear suspension 15 is disposed between the swing arm 12 and the rear frame 11.

  Further, a bar handle 6 is rotatably supported on the head pipe 21 at the front end of the vehicle body frame 20, and a front fork 5 that is steered by the bar handle 6 is connected to the lower side of the bar handle 6. A front wheel 1 is suspended at the lower end of the fork 5.

  The engine 3 is arranged at the center in the longitudinal direction of the vehicle body, and is suspended by an engine suspension frame 23 that is integrated under the left and right main frames 22 of the vehicle body frame 20. The engine 3 is a parallel 4-cylinder engine and is mounted horizontally, and the cylinder 3A above the crankcase is slightly inclined forward. By being mounted in this way, the engine 3 is positioned below the left and right main frames 22. The four exhaust pipes 16 are connected to the exhaust port on the vehicle body front side of the cylinder 3A, and then pass through the lower side of the engine 3 while repeating merging in the middle, and finally are connected to the muffler 17.

  The radiator 4 is disposed at a position substantially the same height as the upper portion of the cylinder 3A in front of the engine 3 with the ventilation surface facing forward. A radiator fan 4A (see FIG. 3) is provided behind the radiator 4. The air cleaner 8 and the fuel injection device 9 are arranged above the engine 3, located on the rear side above the main frame 22, the fuel tank 7 (vehicle-mounted component) is arranged, and placed on the rear frame 11 on the rear side. A seat 14 on which the rider sits is arranged. On the rear frame 11 below the seat 14, electrical components such as a battery 18A, a relay 18B, and an ECU (engine control unit) 18C are provided. Further, a power transmission device 13 is disposed on the left side of the rear part of the vehicle body, and a muffler 17 is disposed on the right side of the rear part of the vehicle body in a lowered state.

Next, the front cowl 50 will be described with reference mainly to FIGS. 1, 2, 4, and 5.
The front cowl 50 is arranged in a range from the front part of the instrument panel arranged in front of the bar handle 6 to cover both the left and right sides of the engine 3 and the exhaust pipe 16, both of which are reinforced plastic front cowl uppers. 51 and a front cowl lower 52 are combined. The front cowl upper 51 is sized to cover the front vicinity of the bar handle 6, and the front cowl lower 52 is sized to cover the side of the engine 3 from the lower edge of the front cowl upper 51. A central opening 66 is provided in the center of the front face of the front cowl 50 to take in the traveling wind into the radiator 4, and the radiator 4 is located behind the central opening 66 when viewed from the front.

  The front cowl upper 51 formed entirely in a streamline shape is fitted with a pair of left and right headlamps 54, and an air suction port 55 for taking in the air sucked into the air cleaner 8 is provided between the left and right headlamps 54. It has been. Further, a windshield screen 56 made of a transparent resin extending obliquely upward and rearward is fitted in the upper center portion so as to cover the instrument panel from the front. Furthermore, on both outer surfaces below the headlamp 54, concave groove portions 57 are provided that extend from the front to the rear along the curvature of both outer surfaces.

  The front cowl lower 52 is formed along the main frame 22 with an under cowl 61 (see FIG. 14) of a size that forms the central opening 66 and covers both sides of the radiator 4 and the exhaust pipe 16, and the under cowl 61. And a knife-shaped middle cowl disposed between the under cowl 61 and the upper cowl 62, and a tip-shaped upper cowl 62 integrally connected to the front cowl upper 51 (see FIG. 16). And a cowl 63 (see FIG. 17). The distance between the under cowl 61 and the upper cowl 63 is set large enough to open most of the side surface of the engine 3 and part of the side surface of the radiator 4 when the middle cowl 63 is removed.

  The middle cowl 63 is not of a size that completely covers the space between the under cowl 61 and the upper cowl 62. The middle cowl 63 is located between the middle cowl 63 and the under cowl 61 and has a lower exhaust port for discharging the wind that has passed through the radiator 4. 71 is formed, and between the middle cowl 63 and the sub cover 62, an upper air exhaust port 72 for discharging the air that has passed through the radiator 4 is formed. The upper cowl 63 having a square shape in side view has a mountain-shaped cross section, and has an inclined surface 62b recessed inwardly on the lower side of the ridge line portion 62a. The inclined surface 62b is connected to the upper edge of the middle cowl 63. Due to the parallel facing relationship, the upper air outlet 72 is open even when viewed from the side, but is larger when viewed obliquely from above (see FIG. 8). Accordingly, the air passing through the radiator is allowed to escape from the upper air exhaust port 72 while rising obliquely rearward.

  Further, the inclined surface 62b of the upper cowl 62 is continuous with the concave groove portions 57 on both side surfaces of the front cowl upper 51, thereby forming a ventilation path 73 through which the traveling wind passes from the front to the rear on both side surfaces of the front cowl 50. ing. The ventilation path 73 pushes the traveling wind outward as it goes rearward because the ridgeline part 62a and the inclined surface 62b of the upper cowl 62 are inclined downward toward the rear while following the inclination of the main frame 22. It is formed by such a route.

  That is, when the air passage 73 is viewed by taking a horizontal section at the height of the concave groove portion 57, the wall on the center side in the vehicle width direction forming the air passage 73 is an inclined surface 62b that inclines down to the rear of the upper cowl 62. And the ridgeline part 62a is comprised. Accordingly, when viewed in a horizontal section, the ventilation path 73 has a shape that goes outward in the vehicle width direction as it goes rearward. Since the traveling wind vigorously enters the recessed groove portion 57, the running wind flows linearly from the front to the rear along the ventilation path 73. For this reason, the traveling wind spreads outward in the vehicle width direction while being guided to the inclined surface 62b of the upper cowl 62.

  Further, the ventilation path 73 has an upper end edge 63a of the middle cowl 63 protruding from the upper side of the recessed groove portion 57, so that the cross-section of the portion is nearly C-shaped. It is easy to take in, and it is easy to guide it to the rear without letting the wind that has taken in.

  1-10, inside the under cowl 61 and the middle cowl 63, a front end opening 81 is opened at a position where the traveling wind is introduced, and a rear end opening 82 is connected to the main frame 22. An outside air induction duct 80 opened toward a space N (see FIG. 7) surrounded by the engine 3 and the fuel tank 7 is disposed on the inner surfaces of the under cowl 61 and the middle cowl 63. The outside air introduction duct 80 is mainly constituted by a tube 80S blow-molded with a soft material such as rubber or resin.

  Further, as shown in FIGS. 3 and 10, on the rear side of the space N surrounded by the main frame 22, the engine 3 and the fuel tank 7, exhaust air for further blowing back the traveling wind introduced into the space N. An air passage 90 is formed. This exhaust passage 90 is connected to the rear frame 11 connected to the rear end of the vehicle body frame 20, and the rear end of the vehicle body frame 20 via the pivot shaft 10 at a position below the connection position of the rear frame 11. It is secured between the swing arm 12 and the swing arm 12 connected to be swingable in the vertical direction.

  On the side surface of the under cowl 61 of the front cowl lower 52, a running wind intake 67 communicating with the front end opening 81 of the outside air guiding duct 80 is opened. The traveling wind inlet 67 is provided on the front surface of the bulging portion 68 provided on the side surface of the under cowl 61. The traveling wind intake 67 is disposed below the lower end of the radiator 4, and a lower exhaust port 71 of the radiator passing air is secured on the side surface of the front cowl lower 52 above the traveling wind intake 67.

  As shown in FIGS. 6 to 9, the outside air induction duct 80 in this case has a rear cylindrical portion 84 facing the center side in the vehicle width direction on the rear end opening 82 side, and the rear cylindrical portion 84. An integrally formed tube 80 </ b> S having a semi-cylindrical front cylindrical portion 83 that defines a ventilation path by matching with the inner surfaces of the under cowl 61 and the middle cowl 63 is combined with the under cowl 61 and the middle cowl 63. It is formed by.

  FIG. 10 shows a schematic configuration of the tube 80S. As shown in FIG. 11, the outside air induction duct 80 is configured by closing the opening surface of the semi-cylindrical front cylindrical portion 83 of the tube 80 </ b> S with the inner surface of the under cowl 61 and the middle cowl 63. The rear cylindrical portion 84 of the tube 80S constituting the outside air induction duct 80 is formed in a tapered shape in which the flow path area is narrowed toward the rear end opening portion 82.

  In this embodiment, as shown in FIG. 11, the outside air induction duct 80 is configured using a tube 80S in which the front cylindrical portion 83 is formed in a semi-cylindrical shape. However, as shown in FIG. The outside air induction duct 80 may be configured as shown in FIG. 13 by using a tube 80T that is formed into a complete cylindrical shape including the cylindrical portion 83.

  By the way, as shown in FIG. 9, the outside air induction duct 80 configured in this way includes an engine suspension frame 23 provided in the vehicle body frame 20 and an auxiliary machine (AC cover magnet cover 31 of the AC generator) protruding from the side of the engine 3. And the empty space between the pump 32 and the like 32) is passed from the front to the rear. Thus, the provision of the outside air guiding duct 80 prevents the front cowl lower 52 from increasing in the vehicle width direction. That is, since the empty space is effectively used, there is no dimensional disadvantage.

Next, the operation will be described.
During traveling, as indicated by the arrow F in the figure, the traveling wind enters from the traveling wind inlet 67 of the front cowl lower 52 and passes through the outside air induction duct 80 and behind the cylinder 3A of the engine 3. It is introduced toward a space N surrounded by the main frame 22, the engine 3 and the fuel tank 7. When the traveling wind is introduced into the space N, the hot air confined in the space N is pushed backward and discharged from the exhaust passage 90 to the outside of the vehicle. Therefore, it is possible to prevent the hot air from staying and to prevent the fuel tank 7 and the main frame 22 from becoming high temperature.

  Further, since fresh outside air can be introduced behind the cylinder 3A as a heat source, the cooling effect of the cylinder 3A can also be obtained. Further, since the outside air flows rearward from the space N along the rear frame 11, the cooling effect of the rear frame 11 can be obtained, and the electrical components (battery 18A, relay 18B, ECU 18C) mounted on the rear frame 11 can be cooled. An effect is also obtained.

  In particular, an outside air induction duct 80 is provided along the inside of the side surface of the front cowl lower 52, and a front end opening 81 of the outside air induction duct 80 is formed in a traveling wind intake port 67 that is open on the side surface of the front cowl lower 52. Because the communication is made, the wind can be positively guided through the outside air induction duct 80 unlike the case where the running wind is simply taken into the front cowl 50 from the traveling wind inlet 67, thereby ensuring the purpose. The outside air can be efficiently and efficiently led to the point. Therefore, the outside air can be surely poured into the narrow space N, and the hot air can be efficiently blown off. In addition, in order to avoid the heat | fever penetration | invasion to electrical components, such as battery 18A, it is good to provide the heat shield between the sheet | seat 14 and the battery 18A.

  In addition, since the hot air accumulated in the space N surrounded by the main frame 22, the engine 3 and the fuel tank 7 can be released outside the vehicle through the space between the rear frame 11 and the swing arm 12, it is reasonably safe. Hot air can be released.

  Further, since the outside air induction duct 80 is manufactured by blow molding, the path through which the wind passes can be easily made with a smooth curved surface, and the ventilation resistance can be reduced. Further, when the front end opening 81 side of the outside air induction duct 80 is formed in a semi-cylindrical shape, since a part of the duct wall is made of the wall of the front cowl lower 52, an increase in the dimension of the front cowl lower 52 in the vehicle width direction is suppressed. However, it is possible to ensure a ventilation path having a large channel cross section. Furthermore, since the rear end opening 82 side of the outside air induction duct 80 is provided as the rear cylindrical portion 84, it is possible to reliably guide the traveling wind to the target location.

  Further, the traveling wind intake 67 is provided while avoiding the installation height of the radiator 4, and the upper exhaust outlet 72 for the radiator passing air is provided on the side surface of the front cowl lower 52 above the traveling wind intake 67. The outside air induction duct 80 can be arranged without difficulty while ensuring a sufficient escape path for the passing air. Moreover, since the air intake 67 is provided in the front surface of the bulging part 68 provided in the side surface of the front cowl lower 52, traveling wind can be taken in efficiently.

  The rear end of the outside air induction duct 80 may be positively directed toward the bottom of the fuel tank 7. In such a case, fresh outside air can be directly applied to the bottom of the fuel tank 7. 7 can further enhance the cooling effect. Further, since the outlet (rear end opening 82) for blowing out the traveling wind is narrowed, it can be applied to a target location while increasing the flow velocity, and a pinpoint cooling effect can be obtained.

Next, another embodiment in which some changes are made to the motorcycle of the above embodiment will be described.
FIG. 18 is a view similar to FIG. 7 in another embodiment.
In the motorcycle according to this embodiment, the outside air guide duct 80 is provided with a discharge hole 88 for discharging the traveling wind toward the side of the seat 14 on which the rider sits when viewed from above. Other than that is the same as that of the said embodiment.

  By providing the discharge hole 88 in the outside air induction duct 80 in this way, a part of the traveling wind introduced through the outside air induction duct 80 can be discharged toward the rider's knee Mh. Therefore, it is possible to reduce the thermal effect before the rider's knee.

FIG. 19 is a partial configuration diagram of still another embodiment. FIG. 19A is a side view of the front cowl, and FIG. 19B is a BB line arrow view of FIG.
In the motorcycle of this embodiment, the traveling wind inlet 67 is provided with a door-shaped guide member 67D that can be opened and closed. A guide surface (guide portion) 67d that guides the flow along the outer surface is provided. In this way, the traveling wind intake 67 can be closed when not needed, and the traveling wind can be guided to the flow along the outer surface of the front cowl lower 52 in this state. Therefore, the running resistance can be reduced as compared with when the running wind inlet 67 is opened.

  In the above-described embodiment, the case where the vehicle-mounted component that surrounds the space N is the fuel tank 7, but may be a component other than the fuel tank 7.

1 is a left side view showing an overall configuration of a motorcycle according to an embodiment of the present invention. Fig. 2 is a right side view showing an overall configuration of the motorcycle. It is a principal part side view which takes out the point part of the same motorcycle, and shows it with the flow (arrow) of a wind. Fig. 2 is a front view showing an overall configuration of a front cowl of the motorcycle. It is a side view which shows the whole structure of the front cowl. It is a fragmentary perspective view of the point portion of the same motorcycle. It is a horizontal sectional view of the same point portion. It is the perspective view of the same point part seen from another angle. FIG. 3 is a perspective view of the same point portion showing a state where a middle cowl is removed in the motorcycle. It is a perspective view which takes out and shows the component of the outside air induction duct in the said motorcycle. It is sectional drawing at the time of attaching the component of FIG. 10 to a front cowl, and comprising the outside air induction duct. It is a perspective view which shows another example of the component of the external air induction duct in the said motorcycle. It is sectional drawing at the time of attaching the component of FIG. 12 to a front cowl, and setting it as an external air induction duct. FIG. 3 is a front view showing a configuration of only an under cowl constituting a front cowl lower in the motorcycle. It is a side view which shows the structure of the front cowl lower. It is a side view of the upper cowl which comprises the front cowl lower. It is a side view of the middle cowl which comprises the front cowl lower. It is a figure similar to FIG. 7 in other embodiment of this invention. It is a principal part block diagram in other embodiment of this invention, (a) is a side view of a front cowl, (b) is a BB arrow directional view of (a).

Explanation of symbols

3 Engine 4 Radiator 4A Radiator fan 7 Fuel tank (vehicle mounted parts)
10 Pivot Shaft 11 Rear Frame 12 Swing Arm 14 Seat 15 Rear Suspension 18A Battery (Electrical Equipment)
18B Relay (Electrical component)
18C ECU (electrical equipment)
20 Body frame 21 Head pipe 22 Main frame 23 Engine suspension frame 31 Magnet case for AC generator (auxiliary machine)
32 Pumps (auxiliary equipment)
DESCRIPTION OF SYMBOLS 50 Front cowl 67 Traveling wind inlet 67D Guide member 67d Guide surface 68 Swelling part 71 Lower side exhaust port 72 Upper side exhaust port 80 Outside air induction duct 81 Front end opening part 82 Rear end opening part 83 Front cylindrical part 84 Rear cylindrical part 88 Exhaust hole 90 Exhaust passage N Space surrounded by main frame, engine and fuel tank Mh Rider's knee

Claims (17)

A motorcycle comprising a vehicle body frame, an engine suspended on the vehicle body frame, and a vehicle-mounted component disposed at a position above the vehicle body frame,
An outside air induction duct that includes a front end opening that is formed in a space that is covered by the vehicle body frame, the engine, and the vehicle-mounted component and that opens to a position where traveling wind is introduced, and a rear end opening that opens into the space. A motorcycle characterized by comprising   An exhaust passage that communicates with the space covered by the vehicle body frame, the engine, and the vehicle-mounted component, blows air introduced into the space rearward, and discharges air outside the space is provided. The motorcycle according to claim 1, characterized in that:   The motorcycle according to claim 1 or 2, wherein the vehicle-mounted component is a fuel tank.   The vehicle body frame includes a head pipe and a pair of left and right main frames extending rearward from the head pipe. The engine is suspended at a lower position between the pair of left and right main frames. The motorcycle according to any one of claims 1 to 3, wherein the motorcycle is disposed at an upper position between the pair of left and right main frames.   The exhaust passage swings up and down via a pivot shaft at a rear frame connected to the rear end of the vehicle body frame and at a position lower than a connection position of the rear frame via a pivot shaft. 3. The motorcycle according to claim 2, wherein the motorcycle is formed between a swing arm that is movably connected and supported.   The motorcycle according to any one of claims 1 to 5, wherein a rear end of the outside air induction duct is opened toward a bottom portion of the vehicle-mounted component.   The motorcycle according to any one of claims 1 to 6, wherein the outside air induction duct has a shape in which a flow path area is narrowed toward a rear end.   A front cowl that covers from the front of the vehicle body to the side of the vehicle body; a running wind inlet is opened on a side surface of the front cowl; The motorcycle according to any one of claims 1 to 7, wherein the motorcycle is disposed along an inner side surface of the front cowl.   The outside air introduction duct is formed of a front cylindrical portion that is arranged at the front portion and extends along the front cowl, and a rear cylindrical portion that is arranged at the rear portion and faces the center in the vehicle width direction. The motorcycle according to claim 8, wherein   The motorcycle according to claim 9, wherein the outside air induction duct is configured by a blow molded product. A radiator disposed in front of the engine;
The motorcycle according to any one of claims 8 to 10, wherein the traveling wind intake is disposed below a lower end of the radiator.   The motorcycle according to claim 11, wherein an exhaust port for discharging the traveling wind that has passed through the radiator is opened on a side surface of the front cowl above the traveling wind inlet.   The motorcycle according to any one of claims 8 to 12, wherein a bulging portion is formed on a side surface of the front cowl, and the traveling wind inlet is provided in the bulging portion.   An engine suspension frame attached to the pair of left and right main frames, and an auxiliary device attached to the engine and projecting to the side thereof, and the outside air induction duct is disposed between the engine suspension frame and the auxiliary device. The motorcycle according to claim 4, wherein the motorcycle is provided.   A guide member that can be opened and closed is provided at the traveling wind inlet, and the guide member has a guide portion that guides the traveling wind to a flow along the outer surface of the front cowl when the traveling wind inlet is closed. The motorcycle according to claim 8, wherein the motorcycle is provided.   16. The seat according to claim 1, further comprising: a seat on which a rider is seated, wherein the outside air guide duct includes a discharge hole for discharging running wind toward the side of the seat when viewed from above. Motorcycle described in 1.   6. The motorcycle according to claim 5, wherein an electrical component is attached to the rear frame.

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