JP2003104265A - Cooling structure of motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain influences of turbulence of running air due to drivers of a motorcycle, fully utilize a suction effect due to negative pressure, improve cooling performance of a radiator, and smoothly exhaust cooling air after the air passes through the radiator. SOLUTION: A water cooling internal combustion engine 7 is built in a motorcycle V, and a radiator 40 is arranged in a rear cover 14. Left and right covers 14L and 14R are smoothly curved upwards and towards a center N of a body as they approach to the rear end. The covers are curved upwards above a rear fender 15, and smoothly communicated with a rear bottom cover 14w which faces a ground surface G, and an exhaust port 44 for exhausting the cooling air, which has passed through the radiator 40, to the ambient air, is formed at the rear bottom cover 14w.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling structure for a motorcycle equipped with a water-cooled internal combustion engine, in which a radiator is arranged in a rear body cover.

[0002]

2. Description of the Related Art Conventionally, a motorcycle equipped with a water-cooled internal combustion engine in which a radiator is arranged along an inner surface of a rear portion of a body cover is disclosed in Japanese Utility Model Publication No. 62-30865. This radiator is located inside the body cover, close to the louver provided along the rear surface of the body cover that extends rearward from the rear end of the seat on which the driver sits, and the heat supplied from the air pump to the radiator through the duct. Replacement air is exhausted out of the body cover through the louver. The ventilation efficiency of the radiator is enhanced by utilizing the suction effect of the negative pressure generated at the rear portion of the body cover during traveling.

[0003]

By the way, in the above-mentioned prior art, the surface of the body cover in the portion where the louver is provided faces rearward and obliquely upward, and therefore is positioned in the wake of the driver. Therefore, the traveling wind near the louver is easily affected by the large turbulence of the traveling wind due to the driver's upper body and the change in the turbulence of the traveling wind due to the change in the driver's posture, and the pressure near the louver affects the influence. Therefore, the suction effect of the negative pressure of the heat exchange air after passing through the radiator could not be fully utilized in a stable state, and there was room for improvement in the cooling performance of the radiator. Also, since the louver faces upward, rainwater can easily enter the body cover from the louver.Therefore, it is necessary to set the angle of the louver plate of the louver so that rainwater does not easily enter the body cover. As a result, the flow direction of the heat exchange air after passing through the radiator is largely changed to increase the ventilation resistance, and the air is not discharged smoothly, or a duct that makes the discharge of the heat exchange air smooth is installed. When designing, there is a problem that the layout of members arranged around the duct is restricted in a limited space inside the body cover.

The present invention has been made in view of such circumstances, and the inventions according to claim 1 and claim 2
Suppresses the influence of turbulence of running wind by motorcycle occupants, fully utilizes the suction effect of negative pressure, improves the cooling performance of the radiator, and further smooths the discharge of cooling air after passing through the radiator. The purpose is to Further, the invention according to claim 2 can further suppress the influence of the turbulence of the traveling wind due to the rear lamp and further increase the utilization of the space inside the rear body cover in which the radiator is arranged. With the goal.

[0005]

According to a first aspect of the present invention, a motorcycle equipped with a water-cooled internal combustion engine and a radiator disposed inside a rear body cover that covers an upper portion of the rear wheel is provided. In the cooling structure, the left and right cover portions of the rear vehicle body cover are curved rearward and smoothly toward the vehicle body center toward the rear end of the rear vehicle body cover, and are rearwardly raised above the rear fender. The exhaust structure, which is smoothly connected to the rear lower cover portion facing the surface of the earth and discharges the cooling air after passing through the radiator into the outside air, is a motorcycle cooling structure formed in the rear lower cover portion. .

As a result, the running wind flows along the outer surfaces of the left and right cover portions that are smoothly curved, and then flows along the outer surface of the rear lower cover portion where the air outlet is formed with little disturbance, and the air outlet is also exhausted. Since the rear lower cover in which is formed faces the ground surface, the influence of turbulence of the traveling wind due to the posture of the occupant of the motorcycle is small, and a large negative pressure acts on the exhaust port. In addition, since the rear lower cover part is rearwardly upward above the rear fender and faces the surface of the ground, not only the rainwater that falls but also the rainwater that is splashed up is blocked by the rear fender. The rainwater does not easily infiltrate through the exhaust vent because the is raised to the rear.

Therefore, according to the invention described in claim 1, the following effects can be obtained. That is, the left and right cover portions of the rear vehicle body cover curve upwardly rearward toward the rear end and smoothly curve toward the center of the vehicle body to smoothly connect to the rear lower cover portion, and the air outlet is formed in the rear lower cover portion. As a result, the running wind flows along the outer surface of the left and right cover parts, then flows on the outer surface of the rear lower cover part with little turbulence, and the rear lower cover where the air exhaust port is formed faces the ground surface. Since it is facing downward, that is, the influence of the turbulence of the running wind due to the posture of the occupant of the motorcycle is small, and a large negative pressure is stably applied to the exhaust air outlet, and the cooling air passing through the radiator is effective. Are sucked out, and the cooling performance of the radiator is improved.

Further, since the rear lower cover part is located above the rear fender and is raised rearward and faces the surface of the ground, not only the falling rainwater but also the splashed rainwater is obstructed by the rear fender to be discharged. Since rainwater does not easily enter from the wind vent, it is not necessary to largely deflect the direction of the cooling air flow after passing through the radiator with a louver plate, etc., to prevent the infiltration of rainwater, and the cooling air flow after heat exchange is smooth. The radiator can be discharged into the outside air, which also improves the cooling performance of the radiator. Further, since there are few restrictions on the direction of exhaust air, the degree of freedom in the layout of the duct that supplies the cooling air to the radiator and the degree of freedom in the layout of the parts around the duct are increased.

According to a second aspect of the present invention, in the motorcycle cooling structure according to the first aspect, the rear lamp is fitted into an opening of the rear body cover formed above the exhaust port, The outer surface of the lens of the rear lamp forms a smooth continuous surface with the outer surface of the rear vehicle body cover.

As a result, the running wind flows along the outer surface of the rear vehicle body cover portion including the left and right cover portions without being disturbed by the rear lamps. Therefore, according to the invention of claim 2, in addition to the effect of the invention of claim 1, the following effect is exhibited. That is, the outer surface of the lens of the rear lamp fitted in the rear body cover above the air outlet forms a smooth continuous surface with the outer surface of the rear body cover, so that the running wind is not disturbed by the rear lamp. Since it flows along the outer surface of the cover part, the rear body cover part, and the rear lower cover part, the negative pressure acting on the exhaust port is hardly affected by the rear lamp, and the cooling air passing through the radiator is effective from the exhaust port. The cooling performance of the radiator is improved. Further, since the rear lamp is provided above the exhaust port, the duct that supplies the cooling air to the radiator can be arranged below the rear body cover, and the space below the seat can be enlarged, for example The space to be stored can be enlarged, and the utilization of the space inside the rear body cover in which the radiator is arranged can be increased.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. Referring to FIG. 1, a motorcycle V to which the present invention is applied is a scooter type motorcycle, and a steering handlebar 2 is provided on a front portion of a vehicle body 1 of the motorcycle V. A steering mechanism for steering the front wheels 3 is provided, and a power unit for driving the rear wheels 4 is supported by a vehicle body frame (not shown) at the center of the vehicle body 1.
At the rear part, a swing arm 5 swingably supported by a pivot shaft provided on the vehicle body frame is provided.
A rear suspension mechanism for suspending the vehicle is further provided, and a tandem seat 6 for the driver R1 and a passenger R2 is provided above the power unit and the rear suspension mechanism from the central portion to the rear portion of the vehicle body 1. In this specification, "front and rear, left and right" means front, rear, left and right of the motorcycle V, and "vehicle center"
Means the center of the vehicle body 1 in the left-right direction.

The power unit includes a water-cooled internal combustion engine 7 and a power transmission device (not shown) having a transmission and a final reduction gear. The power from the crankshaft of the internal combustion engine 7 is input to the transmission, the output of the transmission is transmitted to the rear wheels 4 via the final reduction gear, and the rear wheels 4 are driven.

The exhaust gas discharged from the exhaust port of the internal combustion engine 7 is discharged into the atmosphere through the exhaust pipe 8 and the exhaust mufflers 9L and 9R arranged on both left and right sides of the vehicle body 1. As shown in FIG. 2, the exhaust mufflers 9L and 9R have outer tubes 9aL and 9aR whose lateral cross-sectional shape gradually decreases from the upper part to the lower part in the left-right direction, and the exhaust mufflers 9L and 9R decrease toward the vehicle body downward. The inner pipe wall near the center N extends substantially vertically, while the outer pipe wall extends downward while curving toward the center N of the vehicle body, and has a generally long wing profile in the up-down direction. As a result, a large bank angle can be obtained. The first and second tail pipes 10a and 10b are connected to the exhaust mufflers 9L and 9R, respectively. As a result, it is possible to secure an outlet area that allows the exhaust gas to be smoothly discharged into the outside air, and reduce exhaust noise by reducing the outlet area of each tail pipe 10a, 10b. Furthermore, since the tail pipes 10a, 10b are arranged side by side in the vertical direction, the width of each exhaust muffler 9L, 9R in the left-right direction becomes smaller, and it is possible to take a large bank angle also in this respect. Become.

Referring also to FIG. 3, the vehicle body frame of the motorcycle V includes a plurality of synthetic resin vehicle body covers C.
Covered by. This vehicle body cover C is connected to the front cover 11 to cover the front portion of the vehicle body frame and the upper and rear portions of the front wheels 3, and is connected to the front cover 11 to cover the rear portion of the steering mechanism and the front portion of the legs of the driver R1. A pair of left and right center covers 13L, 13R which are connected to the upper leg shield 12 and the front cover 11 and cover the lateral and downward sides in the left and right direction at the center of the body frame.
And a rear cover 14 that is connected to the center covers 13L and 13R and covers the rear portion of the vehicle body frame and the rear wheel 4 above.
And a rear fender 15 that is attached to a rear mounting portion 14m of the rear cover 14 and covers the rear wheel 4 from above.

The lower part of the front cover 11 has a lower leg shield 11a connected to the upper leg shield 12,
A front fender 11b and a floorboard 11c that supports the feet of the driver R1 are formed, and the rear parts of both center covers 13L and 13R are the floorboards 13aL that support the feet of the passenger R2.
It forms 13aR. Further, inside the rear cover 14 below the seat 6, a storage box (not shown) for storing articles such as a helmet is provided. Further, the rear upper portion of the rear cover 14 forms a trunk 17 in cooperation with the rear cover 14, and the front portion of the rear cover 14 has a back portion for the passenger R2.
Covered by an upper cover 16 forming a 16a, a rear cover 1
The rear body cover is constituted by 4 and the upper cover 16.

A driver R1 or a driver R1 and a passenger R2 are provided at the rear end 20a of the front window 20 which extends obliquely upward and rearward from the upper part of the front cover 11 and has a transparent synthetic resin shield 21. The front end of the roof 22 that covers the upper side of the occupant is detachably connected. The roof 22 is composed of a telescopic first roof 22a and a second roof 22b, and the second roof 22b can be pivoted to the upper cover 16 and the second roof 22b by the lower pivot portion 23a and the upper pivot portion 23b. It is supported on the vehicle body 1 by the pillars 23 connected to it.

The roof 22, as shown in FIG.
The front end 22a1 of the roof 22a is connected to the rear end 20a of the front window 20 and a transparent synthetic resin shield 24
With the first roof 22a having the above-mentioned structure entering the inside of the second roof 22b, the first roof 22a can occupy a storage position (shown by a chain double-dashed line) that is stacked on the top of the upper cover 16. Then, when the roof 22 occupies the storage position, the column 23 is stored in the recess 16b (see also FIG. 3) formed in the upper surface of the upper cover 16, and the roof 22 functions as a rear spoiler. Then, the position of the roof 22 is changed by operating a hydraulic actuator arranged adjacent to the trunk 17 in the space formed by the rear cover 14 and the upper cover 16 in accordance with the operation of the switch.

Further referring to FIG. 3 together, the automatic 2
The wheeled vehicle V includes a pair of left and right front lamps 30 including a head lamp 31 and a front blinker lamp 32 having a large number of LEDs L1 as light sources (only the left front lamp is shown in the drawing). , A pair of left and right rear lamps 33 composed of a stop lamp 34 and rear turn signal lamps 35L, 35R
Equipped with L, 33R, and high mount stop lamp 36. Of these, the high-mount stop lamp 36 that uses a large number of LEDs L2 as its light source is the roof that doubles as a rear spoiler.
Since it is attached to the rear surface of the roof 22, the high mount stop lamp 36 occupies a high position when the roof 22 is in the deployed position, which facilitates visual recognition. The front lamp 30, the rear lamps 33L and 33R, and the high mount stop lamp 36 include lenses that cover these lamps.

1 to 3, the structure of the rear portion of the vehicle body 1 will be described with a focus on the rear cover 14, the radiator 40, the exhaust port 44, and the rear lamps 33L and 33R. The rear cover 14, which is U-shaped in a plan view and is formed symmetrically with respect to the center N of the vehicle body, includes a left cover portion 14L and a right cover portion 14R that cover the left and right sides of the rear portion of the vehicle body frame, respectively.
And a rear lower cover portion 14w that serves as a connecting portion between the left and right cover portions 14L and 14R and covers the rear fender 15 from above, and these cover portions 14L, 14R, and 14w are integrally molded. Of these, the left cover part 14L and the right cover part 1
The rear part of the 4R is fitted into the pair of left and right bulges 14bL and 14bR formed by bulging in the left-right direction, respectively.
It has upper cover parts 14aL and 14aR above L and 33R.
The upper cover portions 14aL and 14aR are the trunk 17
It forms the left and right walls.

The left and right cover parts 14L and 14R are curved upward and rearward toward the rear end of the rear cover 14 from the connecting parts with the center covers 13L and 13R, and smoothly curve toward the center N of the vehicle body to form the rear fender 15. Upper rear cover 14w
It runs smoothly. This rear lower cover portion 14w is shown in FIG.
As is clear from FIG. 3, it is rising backward and faces the ground surface G. Therefore, when the motorcycle V is traveling, the traveling wind W (indicated by the two-dot chain line in FIGS. 2 and 3) is the outer surface of the left and right cover portions 14L and 14R, that is, the side surface of the rear cover 14. , And along the outer surface of the rear lower cover portion 14w, that is, the lower surface of the rear cover 14, with almost no turbulence. Here, when the rear lower cover portion 14w faces the ground surface G, the outer surface of the rear lower cover portion 14w faces the ground surface G, or the normal line of the outer surface of the rear lower cover portion 14w points toward the ground surface G. It means that there is.

On the other hand, as shown in FIG. 1, the rear cover
Inside the rear part of the radiator 14, a radiator 40 connected to the internal combustion engine 7 via a cooling water hose (not shown) is arranged close to the rear lower cover part 14w and along the rear lower cover part 14w. It In order to promote cooling of the cooling water by the radiator 40, a cooling fan 41 driven by an electric motor 42 is provided close to the radiator 40 as a blowing means of cooling air to the radiator 40. The cooling fan 41 that sucks the air in the rear cover 14 and blows it to the radiator 40 discharges the hot air in the rear cover 14 to the outside, so that the temperature rise in the storage box can be suppressed, for example. Further, as the air blower, instead of the cooling fan 41, an electric air pump (not shown) that pressure-feeds air from an air intake provided on the front surface of the front fender 11b can be used. In that case, the radiator 40 is arranged at the outlet of a duct (not shown) communicating with the discharge port of the air pump.

An exhaust port 44 for discharging the cooling air, which has passed through the radiator 40, to the outside air through the grid 43 (see FIGS. 2 and 3) is provided at the mounting portion of the rear fender 15 from the outer surface of the rear lower cover portion 14w. It opens to the rear of 14m. The cooling air that has passed through the radiator 40 is discharged from the air exhaust port 44 without the flow direction thereof being largely deflected by the grid 43, and the discharged cooling air flows to the rear in a substantially horizontal direction. The opening area of the exhaust port 44 can be increased by forming part of the exhaust port 44 using the mounting portion 14m.

The left and right rear lamps 33L and 33R located above the exhaust port 44 are composed of a stop lamp 34 using a large number of LEDs L3 as light sources and rear turn signal lamps 35L and 35R using a large number of LEDs L4 as light sources. One lens 37 with a transparent stop lamp 34 and rear turn signal lamps 35L and 35R
It is covered and configured. In each of the rear lamps 33L and 33R, in the stop lamp 34, a large number of LEDs L3 are arranged in a region facing rearward, and the left rear turn signal lamp 35.
In L, a part of the large number of LEDL4 is arranged in a region facing rearward, and the rest is arranged in a region facing leftward. Similarly, in the right rear turn signal lamp 35R, a part of the large number of LEDL4 faces rearward and the rest is It is located in the area facing to the right. In addition, in FIG.
Area of the stop lamp 34 and each rear turn signal lamp 35
The boundary between the L and 35R regions is indicated by a chain double-dashed line.

Then, as shown in FIG.
37 is an upper edge 14c of the rear cover 14 and a lower edge 16c of the upper cover 16.
The outer peripheral edge of each lens 37 has edges 14c and 16c of each cover and a notch in an opening formed by a space formed between the lens and a notch 14d provided along the bulges 14bL and 14bR. 14
It is fitted so that it is aligned with the edge of d. Therefore, in the fitted state, the outer surface of each lens 37 forms a smooth continuous surface with the outer surfaces of the rear cover 14 and the upper cover 16, and each lens 37 covers the cover.
It has the appearance of being a part of 14 and 16. Therefore, the traveling wind W flowing along the rear cover 14 causes the rear lamp
It is hardly disturbed by 33L and 33R.

Further, each rear lamp 33L, 33R has a built-in rear monitoring camera 38. This camera 38
In each of the rear lamps 33L and 33R, covered by the lens 37,
The stop lamp 34 is provided adjacent to and near the center N of the vehicle body. The video image taken by the camera 38 is displayed on a pair of monitors 39 (the right monitor is shown in FIG. 3) provided at both left and right ends of the instrument panel, and the monitors are displayed.
39 acts as a rearview mirror.

Next, the operation and effect of the embodiment configured as described above will be described. The left and right cover portions 14L and 14R of the rear cover 14 forming the rear vehicle body cover curve rearwardly upward toward the rear end of the rear cover 14 and smoothly curve toward the vehicle body center N, and smoothly connect to the rear lower cover portion 14w. Since the exhaust port 44 is formed in the rear lower cover part 14w, the traveling wind W flows along the outer surfaces of the left and right cover parts 14L and 14R that are smoothly curved, and then the exhaust port 44 is discharged with little disturbance. The rear lower cover portion 14 that flows on the outer surface of the formed rear lower cover portion 14w and has the air outlet 44 formed therein
Since w faces the ground surface G, that is, faces downward, the influence of the turbulence of the traveling wind W due to the posture of the occupant of the motorcycle V is small, and a large negative pressure is stably applied to the exhaust port 44. The cooling air that has acted and passed through the radiator 40 is effectively sucked out, and the cooling performance of the radiator 40 is improved.

Furthermore, since the rear lower cover portion 14w is located above the rear fender 15 so as to be raised rearward and faces the surface G of the ground, not only falling rainwater but also
Rainwater that has bounced up is also difficult to enter from the exhaust port 44 because the rear fender 15 blocks the rainwater and the rear lower cover portion 14w is raised rearward. Therefore, in order to prevent infiltration of rainwater, it is not necessary to largely deflect the direction of the cooling air flow after passing through the radiator 40 by a louver plate or the like, and the cooling air after heat exchange can be smoothly discharged to the outside air. Radiator 40 also in this respect
The cooling performance of is improved. Further, since there are few restrictions on the direction of exhaust air, the degree of freedom in layout of the duct 41 that supplies the cooling air to the radiator 40 and the degree of freedom in layout of parts around the duct 41 are increased.

The outer surface of the lens 37 of each of the rear lamps 33L and 33R fitted between the rear cover 14 and the upper cover 16 above the air outlet 44 forms a smooth continuous surface with the outer surface of the rear cover 14 to allow traveling. The wind W is not disturbed by the rear lamps 33L and 33R, and the left and right cover portions 14L and 14R and the bulging portion
Since the air flows along the outer surfaces of 14b and the rear lower cover portion 14w, the negative pressure acting on the air exhaust port 44 is hardly affected by the rear lamps 33L and 33R, and the cooling air passing through the radiator 40 is effective from the air exhaust port 44. The radiator 40 is sucked into the radiator 40 to improve the cooling performance of the radiator 40. Further, since the rear lamps 33L and 33R are provided above the air exhaust port 44, the duct 41 for supplying the cooling air to the radiator 40 can be arranged below the rear cover 14 and the space below the seat 6 can be expanded. Therefore, the volume of the storage box can be increased, and the utilization of the space inside the rear cover 14 in which the radiator 40 is arranged can be increased.

Further, since the duct 41 for supplying the cooling air to the radiator 40 is arranged below the rear cover 14 to lower the seat height of the seat 6, the roof
Despite having 22, it is possible to lower the vehicle height,
It is possible to make a compact motorcycle V with a roof 22.

Further, the light sources of the rear lamps 33L and 33R are LEDs L3 and L4 as extremely small light sources, and moreover, a large number of LEDs L3 and L4 are dispersed and configured,
After ensuring the required visibility of the rear lamps 33L and 33R,
The degree of freedom in designing the outer surface shape of the lens 37 is increased. As a result, it becomes easy to form the outer surface of the lens 37 so as to form a smooth continuous surface with the outer surface of the rear cover 14, and further, the continuity with the outer surface of the rear cover 14 is formed. Therefore, the turbulence of the traveling wind W can be reduced as much as possible, the effect of sucking the cooling air due to the negative pressure at the exhaust port 44 can be enhanced, and the cooling performance of the radiator 40 can be improved.

In the following, an example in which a part of the configuration of the above-mentioned example is modified will be described.
In the above embodiment, the space inside the rear cover 14 is enlarged so that the utilization of the space can be improved.
The radiator 40 is arranged in the rear vehicle body cover constituted by the rear cover 14 and the upper cover 16 so as to be close to the air outlet 44 and along the rear lower cover portion 14w, but swings according to the traveling state. As shown by the chain double-dashed line in FIG. 1, the radiator 40 is positioned within the range in which it does not come into contact with the rear wheel 4 supported by the radiator 40. The radiator 40 may be arranged so as to face rearward and obliquely upward corresponding to the subordinate cover portion 14w, and further, a part of the radiator 40 may be housed inside the mounting portion 14m protruding downward. As a result, the amount of protrusion of the radiator 40 inside the rear cover 14 is suppressed by using the mounting portion 14m, and the cooling air from the cooling fan 41 driven by the electric motor 42 passes through the radiator 40 before mounting. Since the air flows almost along the traveling wind W flowing on the outer surface of the rear lower cover portion 14w from the rear surface of the portion 14m, it is possible to suppress the disturbance of the traveling wind W due to the protruding mounting portion 14m, and in this respect also, the cooling performance is improved. Can contribute to.

Further, the radiator 40 has a rear lower cover portion 14w.
When it is arranged so as to follow, the air outlet 44 may be opened only in the rear lower cover portion 14w.

In the above-mentioned embodiment, the rear body cover is composed of the U-shaped rear cover 14 in a plan view, but it may be a rear cover which is divided into left and right, and the upper cover 16
Is not essential in constructing the rear body cover, and the rear body cover does not form the trunk 17,
The top cover 16 may be omitted.

[Brief description of drawings]

FIG. 1 is a left side view of a motorcycle according to an embodiment of the present invention.

FIG. 2 is a rear view of the motorcycle shown in FIG.

FIG. 3 is a view of the motorcycle of FIG. 1 as seen from diagonally right rear.

[Explanation of symbols]

1 ... vehicle body, 2 ... steering wheel, 3 ... front wheel, 4 ... rear wheel, 5
... Swing arm, 6 ... Seat, 7 ... Internal combustion engine, 8 ... Exhaust pipe, 9L, 9R ... Exhaust muffler, 10a, 10b ... Tail pipe,
11… Front cover, 12… Upper leg shield, 13L, 1
3R ... Center cover, 14 ... Rear cover, 14L ... Left cover part, 14R ... Right cover part, 14w ... Rear lower cover part, 15 ... Rear fender, 16 ... Top cover, 17 ... Trunk, 20 ... Front window, 21 ... Shield, 22 ... Roof, 23 ... Posts, 24
… Shield, 30… Front lamp, 31… Headlamp, 32…
Front blinker lamp, 33L, 33R ... Rear lamp, 34 ... Stop lamp, 35L, 35R ... Rear blinker, 36 ... High mount stop lamp, 37 ... Lens, 38 ... Camera, 39 ...
Monitor, 40 ... Radiator, 41 ... Cooling fan, 42 ... Electric motor, 43 ... Grid, 44 ... Exhaust port, V ... Motorcycle, R1 ...
Driver, R2 ... Passenger, C ... Body cover, L1-L4 ... LE
D, N ... center of vehicle body, G ... ground surface, W ... running wind.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B62J 15/00 B62J 15/00 C 23/00 23/00 D (72) Inventor Koji Yaginuma Wako City, Saitama Prefecture Chuo 1-4-1 Stock Company Honda Technical Research Institute

Claims (2)

[Claims] 1. A cooling structure for a motorcycle, in which a water-cooled internal combustion engine is mounted, and a radiator is arranged in a rear vehicle body cover that covers an upper portion of a rear wheel, wherein left and right cover portions of the rear vehicle body cover include: As it goes toward the rear end of the rear body cover, it curves upward and rearward toward the center of the vehicle body smoothly, and upwardly and rearwardly above the rear fender to smoothly connect to the rear lower cover portion facing the surface of the ground. A cooling structure for a motorcycle, wherein an exhaust port for discharging the cooling air that has passed through to the outside air is formed in the rear lower cover part. 2. A rear lamp is fitted into an opening of the rear body cover formed above the air outlet, and an outer surface of a lens of the rear lamp forms a smooth continuous surface with an outer surface of the rear body cover. The cooling structure for a motorcycle according to claim 1, wherein the cooling structure is formed.