JPH01153390A - Cooling device for motorcycle - Google Patents

Abstract

PURPOSE: To efficiently lead travel air so as to be able to miniaturize radiators by binding the front part of a side plate for covering each radiator, to the side face of the radiator, and extending the front end of the side plate frontward so as to be opened in the cross direction of a motorcycle. CONSTITUTION: Travel air is led to lateral radiators 18a, 18b by side plates. Front ends 32a, 32b of the side plates are extended frontward so as to be opened in the cross direction of a motorcycle, thereby enlarging travel air intake port area. A large quantity of travel air can therefore be led to the radiators 18a, 18b so as to improve cooling performance. The side plates form shrouds to straighten travel air passing through the radiators 18a, 18b, and at the same time, take in travel air also from below a lower bracket and lead it to the radiators 18a, 18b so as to serve for further improvement of cooling performance. The improvement of cooling performance results in the improvement of heat exchanging efficiency, so that the radiators 18a, 18b can be miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling device that guides running air to a radiator of a motorcycle equipped with a water-cooled engine and efficiently cools the radiator.

In a motorcycle equipped with a water-cooled engine, it is preferable to install a radiator for cooling the engine cooling water in a position where the motorcycle is exposed to good wind. In conventional motorcycles of this type, the radiator is usually attached to the rear of the front wheel, that is, to the downtube.

However, this position makes it easy for the mud thrown up by the front wheels to come off. For this reason, it is best to install the radiator as high as possible, but in the part of the down tube near the steering head pipe, the mudguard for the front wheel is installed in front of the radiator, and the front 7 oak is also located. This makes it difficult for the airflow to directly hit the radiator, reducing the amount of air flowing through the radiator. As a result, the radiator becomes larger for the same amount of heat radiation.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cooling device for a motorcycle that efficiently guides running wind to a radiator, thereby making it possible to downsize the radiator.

In order to achieve such an object, the present invention provides a motorcycle in which a radiator is attached to a vehicle body that is provided with a fuel tank above a water-cooled engine and located below the front of the fuel tank, and the radiator is installed from the outside. Attach the front part of the side plate to be covered to the side of the radiator with bolts, etc.
The front end of the side plate has an oval shape extending forward so as to open in the vehicle width direction.

The present invention will be described in detail below based on the illustrated embodiments.

Fig. 1 is a side view of a motorcycle to which an embodiment of the present invention is applied, Fig. 2 is a plan view thereof, Fig. 3 is a side view of a main part partially cut away, and Fig. 4 is an IV in Fig. 3. -IV line sectional view and FIG. 5 are perspective views of the air blower.

In Fig. 3, numeral 10 is a steering head pipe.
A tank rail 12 and a down tube 14 are welded to this head pipe 10.

In Figures 1 to 4, 16 is a water-cooled engine, and 18 (18a).

18b) is a pair of left and right radiators, and 20 is a fuel tank. As shown in FIG. 3.4, the radiator 18 is located slightly diagonally below the head pipe 10 and below the front of the fuel tank 20, and is connected to the tank rail 12 and down tube 14 by bolts 22 and 24. Each is fixed. The fuel tank 20 covers the upper part of the radiator 18 and forms an oblique wall 20a at a predetermined interval behind the radiator 18. A stay 26 protruding from the wall 20a of the fuel tank 20 and the radiator are fastened together by the bolts 22 and fixed to the tank rail 12.

Cooling water for engine 16! The pipe 28 shown in Figure @3 enters the bottom of the left radiator 18a, and connects the left and right radiators 1.
It is led to the right radiator 18b by a pipe 30 that communicates the upper parts of 8a and 18b.

32 (32a, 32b) are radiators 18a, 18b
It is a side plate that is attached to cover from the outside.

The front part of the side plate 32 is connected to the radiator 1 as shown in Fig. 3.4.
Brackets 34, 36 (36a) projecting from 8.

36b) with bolts 33, etc., and protrudes from the wall 20a of the fuel tank 20.
It is attached to 8. Note that the front end of the side plate 32 is the second.
As is clear from Figure 4, it extends forward to open in the vehicle width direction, making it easier to take in the wind when driving. Further, the side plate 32 is bent toward the center of the vehicle body behind the radiator 18, and a substantially triangular window 40 is formed near this bent portion (the first
(see figure).

The wind passing through the radiator 18. It is discharged through this window 40.

In Figures 1 to 3, 42 (42a, 42b) is a pair of left and right 7s.
My only child is 7 years old. The upper ends of these 70-ton oaks 42 are attached to the head vibe 10 via an upper bracket 44 and a lower bracket 46 so as to be able to turn left and right. 48 is a reversing handle fixed to the upper surface of the upper bracket 44, and 50 is a front 7 orifice 4.
2 is a front wheel attached to the lower end, and 52 is a mudguard fixed to the lower bracket 46.

Reference numeral 54 denotes a wind blower, which is attached near the head pipe 10, that is, between the left and right front seven holes 42a142b sandwiched between the upper bracket 44 and the lower bracket 46. As shown in FIG. 5, the air blower 54 includes a pair of side plates 56 (56a) each having a semi-circular cross section and closely attached to the outer periphery of the 70-ton 7-year-old 42.

56b) and a plurality of air guide plates 58 connecting between the air guide plates 56
Equipped with. A head pipe 10 is provided at the rear end of the baffle plate 58.
An arcuate notch 59 is formed to prevent interference with the The baffle plate 54 is pushed between the front 7 orifices 42 from above with the upper bracket 44 removed, and the plate 58
Due to its own elasticity, the inner surface of the circular cross-section portion of the side plate 56 is pressed to 70 points 42. Then, when the upper bracket 44 is attached, the upper and lower end surfaces of the air guide plate 56 will come into contact with both brackets 44 and 46, and the air guide
The vertical movement of 4 is restricted. The plurality of baffle plates 58 are fixed to the id plate 56 so that their f& ends are oriented toward the radiator 18, as shown in FIG. Further, in this embodiment, a mesh-shaped number display board 6o is fixed to the bracket 44, 46 so as to be located in front of the air blower 54.

Further, in Fig. 1.2, 62 is a rear wheel, 64 is a seat, 66 is a mudguard for the rear wheel 62, and 68 is an exhaust silencer.

Next, the operation of this embodiment will be explained. While the engine 16 is in operation, the cooling water flows through the pipe 28, the left side jetter 18a,
It passes through the pipe 30 and the right 2 jetter 18b to be cooled and returns to the engine 16. While driving, the driving wind is displayed on the Zetsuken display board 6.
0 through the air guide plate 58 toward the radiator 18 . Next, the running wind is taken in by the side plate 32 and reliably guided to the radiator 18. Front ends 32a, 32b of side plate 32
extends forward so as to open in the width direction of the vehicle, increasing the intake area for airflow. Therefore, it is possible to introduce a larger amount of traveling wind to the radiator 18 than in a case where the airflow is not expanded in this way, and the cooling performance of the radiator 18 is improved. Also, the side plate 32
forms a shroud and rectifies the running wind passing through the radiator, and at the same time takes in the running wind from below the lower bracket 46 and guides it to the radiator 18, which helps to further improve the cooling performance of the radiator 18. The running wind that has passed through the radiator 18 is guided to the side plate 32 and the wall 20a of the fuel tank 20, and most of it is exhausted from the window 40 of the side plate 32.
The remainder is guided by the wall 20a and flows below the tank 20, so that it does not remain behind the radiator 18. Improving the cooling performance of the radiator 18 in this way improves the heat exchange efficiency.

Since the present invention is constructed as described above, the radiator is located at a relatively high position above the road surface so that mud thrown up by the front wheels is difficult to adhere to the radiator, a mudguard is attached to the front of the radiator, and a mudguard is attached to the front of the radiator. Even if the oak is located and becomes an obstruction to the running wind, the running wind is guided to the radiator by the side plate, ensuring a sufficient amount of air hitting the radiator, improving cooling performance and preventing the radiator from becoming too large. It becomes possible to achieve a smaller size.

[Brief explanation of the drawing]

Fig. 1 is a side view of a motorcycle to which an embodiment of the present invention is applied, Fig. 2 is a plan view of the same, Fig. 3 is a partially sectional side view of the main parts, and Fig. 4 is the #tJ3 diagram. -IV line sectional view,
FIG. 5 is a perspective view of the baffle. 16...Water-cooled engine 18...Radiator 20...Fuel tank 32...Side plate 33...Bolt patent applicant Yamaha Motor Co., Ltd.%50 No. 40

Claims (1)

[Claims] In a motorcycle in which a radiator is attached to a vehicle body that has a fuel tank above a water-cooled engine and is located below the front of the fuel tank, the front part of the side plate that covers the radiator from the outside is attached to the side surface of the radiator. A cooling device for a motorcycle, characterized in that the side plate is connected by bolts or the like, and the front end of the side plate extends forward so as to open in the vehicle width direction.