JPH01233182A - Cowling device for motorcycle - Google Patents

Abstract

PURPOSE:To enable the reduction in the thermal influence that the high-temperature engine cooling air affects the legs of an operator by directly introducing the cool running wind flowed in from the front through an intake port to the front of the operator's legs through an air-passing passage, during running. CONSTITUTION:Since forwardly opened outside-air intake ports 22 are opened in an under cowling 14 on the right and left both sides of an air introducing port 16, cool running wind from the front flows into the air-passing passages 24 inside the under cowling 14, during running. The discharge port 23 at the end of this air-passing passage 24 is opened directly before the leg part B independently of a cooling air passage 17 in such a condition as the communicating port 26 is closed; therefore, the cool running wind is directly introduced toward the operator's leg part B through the discharge port 23, and directly before the leg part B, the high-temperature cooling air from the cooling air passage 17 is mixed with the cool running wind. Thus, since the temperature of cooling air flowing toward the leg part B is lowered, the thermal influence of cooling air to the leg part B can be restrained to a lower degree, and even in the summer season when the outside air temperature is high, a comfortable drive can be continued.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a motorcycle in which the engine area is covered with a cowling, and particularly to the structure of the cowling.

[Prior Art] In recent years, motorcycles equipped with a cowling at the front of the vehicle body have become popular as commercial vehicles for general driving in order to protect the driver from wind and rain and to reduce air resistance.

By the way, among this type of cowling, a so-called full cowling, which integrally covers the area from the periphery of the headlamp to the periphery of the engine, is provided with a cooling air inlet opening in front of the engine.

Therefore, while driving, the cooling air that flows into the inside of the cowling from the inlet cools the engine cylinder or radiator, and then flows rearward through the space between the cowling and the engine, and then exits from the rear end of the cowling. It is designed to be discharged in the opposite direction.

[Problem to be Solved by the Invention] However, in a motorcycle equipped with such a cowling, the footrest on which the rider rests his/her legs is installed at the rear of the cowling, so the rider's legs are not placed on the cylinder or It will be directly exposed to the high temperature cooling air after cooling the radiator.

Therefore, in the winter when the outside temperature is low, the legs are warmed and no problem occurs, but in the summer when the outside temperature is high, the legs often feel hot, and there is still room for improvement in this point.

The present invention was made based on these circumstances, and
An object of the present invention is to provide a cowling device for a motorcycle that can reduce the thermal influence of high-temperature engine cooling air on the legs of a rider.

[Means for Solving the Problems] Therefore, the present invention is based on a motorcycle in which an engine is mounted in the front lower part of the seat, and a cowling covers the engine from the front to the sides. , a cooling air inlet opening in front of the engine is provided, and an outside air intake opening opening toward the front is provided on both left and right sides of this cowling, and this intake port is connected to a ventilation passage defined in the cowling. The rear end of the ventilation passage is opened in front of the legs of the driver seated on the seat.

[Function] According to this configuration, while the vehicle is running, cold running wind from the front that has flowed into the intake port is guided to the front of the driver's legs through the ventilation passage in the cowling. For this reason, the high temperature cooling air discharged from the rear end of the cowling after cooling the engine,
The cold running air mixes with the front of the legs, so that the thermal influence of the cooling air on the legs can be suppressed accordingly.

[Embodiment 1] A first embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 shows a motorcycle, in which reference numeral 1 indicates a front fork, 2 indicates a front wheel, 3 indicates a handle, 4 indicates a fuel tank, 5 indicates a seat, and 6 indicates a rear wheel. A water-cooled engine 7 is disposed below the fuel tank 4 and in front of the seat 5. The engine 7 of this embodiment is a V-shaped two-cylinder engine in which a front cylinder 8 and a rear cylinder 9 are vertically arranged in a V-shape on a crankcase 10. A vaporizer (not shown) is arranged between the two. The driver A, who is seated on the seat 5, is placed on both sides of the rear part of the crankcase 10 with legs B.
A footrest 11 is provided on which the rear cylinder 9 rests, and the rear cylinder 9 is located just between the legs B.

Incidentally, the area from the front of the handle 3 to the front half of the engine 7 is covered with a cowling 12 made of synthetic resin. This cowling 12 is of a frame fixed type fixed to a frame (not shown), and is divided into two parts, an upper cowl 13 and an under cowl 14. The upper cowl 13 integrally covers the front circumference of the handlebar 3, that is, from the circumference of the headlamp (not shown) to the side of the front half of the fuel tank 4, and a windshield 15 is connected to the upper edge of the upper cowl 13. .

Further, the under cowl 14 is continuous with the upper cowl 13 and integrally covers the front half of the engine 7 from the front to both left and right sides. A cooling air inlet 16 that opens in front of the engine 7 is provided in the front face of the under cowl 14, and a radiator 18 for cooling engine cooling water is disposed in the inlet 16. Both sides of the lower end of the under cowl 14 extend below the crankcase 10 , and between both sides of the under cowl 14 and the engine 7 there is a cooling air guide passage 1 connected to the inlet 16 .
7 is formed. The rear end edge of the under cowl 14 is
It is integrally extended inward at the front of the leg B, and this extended portion constitutes a leg shield 19 that covers the front of the leg B. A slight gap is formed between the inner edge of the leg shield 19 and the engine 7, and this gap constitutes a cooling air outlet 17a connected to the rear end of the cooling air guide passage 17. There is.

Furthermore, a plurality of exhaust ports 20 are opened on both sides of the lower part of the under cowl 14 at positions lower forward than the footrest 11, and these exhaust ports 20 are connected to the cooling air guide passage 17.
is communicated with.

As shown in FIGS. 2 and 3, duct portions 21 are integrally formed on both sides of the under cowl 14 and project in a substantially U-shape on both left and right sides. The front ends of these duct parts 21 are opened forward as they are to form an outside air intake port 22, and the rear ends are extended rearward beyond the leg shield 19 to form an air outlet 23 that opens toward the leg part B. I am doing it. Therefore, the inside of the duct portion 21 constitutes a ventilation passage 24 extending in the front-rear direction, and this ventilation passage 24 is located on the left and right outer sides of the cooling air guide passage 17. These cooling air guide passages 17 and ventilation passages 24 are connected to the under cowl 14.
It is divided on the inside by a partition wall 25, and a communication port 26 is opened in the partition wall 25 to allow the cooling air guide path 17 and the ventilation path 24 to communicate with each other. Communication port 2B
An opening/closing wall 2 for opening and closing the communication port 26 is provided at the front edge of the opening.
7. It is pivoted so that it can rotate in the left and right directions. Openable wall 27
is a closed position that closes the communication port 2B, and a closed position where the communication port 2B is closed, and the ventilation passage 24
The opening/closing wall 2
The rotation operation 7 is performed manually by driver A.

Next, the operation of the above configuration will be explained.

Now, as shown in FIG. 2, when the communication port 26 is closed by the opening/closing wall 27, the ventilation passage 2
4 and the cooling air guide passage 17 are independent from each other, so during driving, the cooling air taken in from the inlet 16 passes through the radiator 18 and then flows into the cooling air guide passage 17 in the amplifier cowl 14. . In this case, since the leg shield 19 is located at the rear end of the cooling air passage 17, the radiator 1
The cooling air that has reached high temperature after passing through
As shown by the broken line arrows in the figure, the undercowl 14 is discharged to the outside through the exhaust ports 20 opened on both sides of the lower part of the undercowl 14, and the remaining cooling air is discharged backward from the exhaust port 17a at the rear end of the undercowl 14. is ejected towards.

In addition, the under cowl 14 has outside air intake ports 22 that are located on both the left and right sides of the inlet 16 and open toward the front, so that cold running wind from the front flows into the inside of the amplifier cowl 14 while driving. It flows into the ventilation passage 24. The air outlet 23 at the rear end of this ventilation passage 24 is connected to the communication port 23 as described above.
6 is closed, it is opened directly in front of the leg B, independent of the cooling air guide passage 17, so that cold running air flows directly toward the leg B of the driver A through the air outlet 23. Immediately in front of this leg B, the high temperature cooling air from the cooling air guide passage 17 and the cold running air mix.

Therefore, the temperature of the cooling air directed toward the legs B is correspondingly lower, so the thermal effect of the cooling air on the legs B can be suppressed to a lower level than in the past, allowing comfortable driving even in the summer when the outside temperature is high. I can continue.

In addition, in this embodiment, the cooling air guide passage 17 and the ventilation passage 24
Since a communication port 26 that is opened and closed by an opening/closing wall 27 is provided in the partition wall 25 that partitions the two, when the opening/closing wall 27 is advanced into the ventilation passage 24 to open the communication port 26 as shown in FIG. The passage 24 is interrupted in the middle, and the outlet 23 of the ventilation passage 24 and the cooling air guide passage 17 are communicated with each other. Therefore, the cold running air is prevented from flowing into the ventilation passage 24, and most of the high-temperature cooling air flowing inside the cooling air guide passage 17 is discharged from the air outlet 23 toward the leg portion B. In winter, when the temperature is low, high-temperature cooling air can be used as warm air for heating, which has the advantage of being convenient for driving in cold weather.

Note that the present invention is not limited to the first embodiment described above, and FIG. 5 shows a second embodiment of the present invention.

This second embodiment has a front cylinder 31 and a rear cylinder 32.
An air-cooled ■-shaped engine 33 is shown, and in this case, there is no radiator in the inlet 16 that takes in cooling air, and the inlet 16 is opened toward the front.

Further, the engine is not limited to a front and rear ■type engine, and for example, a single cylinder engine or a multi-cylinder parallel engine can be used as well.

[Effects of the Invention] According to the present invention described in detail above, during driving, the cold running wind from the front that flows into the intake port is guided directly to the front of the driver's legs through the ventilation passage, so that the rear end of the cowling The high-temperature cooling air discharged from the engine after cooling the engine and the cold running air mix in front of the legs. Therefore, the thermal influence of the cooling air on the legs can be reduced by −10= compared to the conventional case, and the vehicle can continue to be driven comfortably even in the summer when the outside temperature is high.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention.
The figure is a side view of the motorcycle, Figure 2 is a cross-sectional view with the communication port closed, Figure 3 is a cross-sectional view taken along the line ■-■ in Figure 2, and Figure 4 is a cross-sectional view with the communication port open. FIG. 5 is a sectional view showing a second embodiment of the present invention. 5... Seat, 7.33... Engine, 12...
Cowling, 16...Inlet, 17...Cooling air guide passage, 22...Intake port, 24...Vent passage, A...
Driver, B...legs. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Scope of Claims] A motorcycle in which an engine is mounted in the front lower part of the seat and the engine is covered from the front to the sides with a cowling, wherein a cooling air inlet opening in front of the engine is provided in the front of the cowling. At the same time, an outside air intake opening opening toward the front is provided on both left and right sides of this cowling, and this intake port is communicated with a ventilation passage divided in the above-mentioned cowling, so that the rear end of this ventilation passage is A cowling device for a motorcycle, characterized in that the cowling device has an opening in front of the legs of a driver seated on the seat.