JPH0342205B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an engine cooling device for a saddle-ride type four-wheel vehicle.

(Prior Art) A saddle-riding four-wheel vehicle has been put into practical use as a type of vehicle for traveling on rough terrain, etc., and such a saddle-riding four-wheel vehicle has wheels on the front, rear, left and right sides of the vehicle body, and the front and rear wheels are connected to each other. The engine is mounted approximately in the left and right center of the vehicle body, which is desirable from the standpoints of handling safety and vehicle strength, and a seat for the passenger is placed on the vehicle body.

In this type of saddle-type four-wheeled vehicle, the engine has conventionally been cooled only by the wind while the vehicle is running.

(Problem to be Solved by the Invention) By the way, when the engine is cooled by running wind, the cooling efficiency is good when the vehicle speed is above a certain level, but when the vehicle is running at low speeds, the air volume is insufficient, so the cooling performance cannot be satisfied. I end up not being able to do it anymore.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an engine cooling system for a saddle-ride type four-wheeled vehicle that can forcibly cool the engine and has a satisfactory cooling performance, especially when traveling at low speeds.

(Means for Solving the Problems) In order to solve the above problems and achieve the purpose, the present invention provides wheels on the front, rear, left and right sides of the vehicle body, and provides wheels between the front wheels 13 and the rear wheels 16, and approximately on the left and right sides of the vehicle body. The engine 21 is mounted in the center, and steps 3 for resting passengers' feet are located on both sides of the engine 21 on the left and right sides of the vehicle body.
6 and 36, a seat 27 for a passenger is placed on the vehicle body, and a cowling 31 that covers the vehicle body from above is installed. Juan 41
In front of the engine 21, the left and right front wheels 13, 13
It is located behind the axle of the cowling 31 and is integrally provided on the left and right sides of the front part of the cowling 31.
It is characterized in that it is disposed between front fender parts 32, 32 which have a shape that goes around to the rear part of the fenders 3 and 13.

(Function) The running wind from the front is provided integrally with the front part of the cowling 31 and the left and right sides of the cowling 31, and the front wheel 13,
The cooling fan 41 is integrated into the cooling fan 41 by the front fender parts 32, 32 which go around to the rear part of the cooling fan 13 and protect the steps 36, 36 located at the rear.
The engine 21 is forcibly cooled by the cooling fan 41, and since the steps 36, 36 are arranged on the sides of the engine 21 behind the cooling fan 41, especially when driving at low speeds, the steps on both sides of the engine 21 can be cooled down. With the feet of the occupant placed on the steps 36, 36, the cooling air from the fan 41 can be effectively directed to the rear of the engine 21 without escaping to the side of the engine 21, such as the steps 36, 36.

(Example) Examples will be described in detail below based on the accompanying drawings.

1 and 2 are a side view and a schematic plan view of the saddle type four-wheeled vehicle 1, and FIG. 3 is a perspective view with the cowling and the like removed.

The body frame 2 of the saddle type four-wheeled vehicle 1 has a main pipe 4 behind a head pipe 3, and left and right seat pipes 5 behind the main pipe 4, respectively.
5 and the center pipes 6, 6 are connected to the lower pipes 7, 7 forward from the lower ends of the center pipes 6, 6, and the cross pipe 8 installed between the lower pipes 7, 7 and the head pipe 3 are connected to the down pipe 9.
Connect with head pipe 3 and lower pipe 7, 7.
The front portion is connected to the front portion by front pipes 10, 10.

A steering shaft (not shown) of a steering handle pipe 11 is inserted and supported in the head pipe 3, and the head pipe 3 is formed long downward, and left and right tie rods 12, 12 are connected to the lower end of the steering shaft that projects downward.
Tie rods 12, 12 are connected to knuckles (both not shown) that support the axles of front wheels 13, 13 suspended on the left and right sides of front pipes 10, 10, respectively.

On the other hand, a swing arm 15 is pivotally supported on brackets 14, 14 protruding rearward from the lower portions of the center pipes 6, 6, and axles (not shown) of left and right rear wheels 16, 16 are suspended and supported at the rear of the swing arm 15. Ru.

The engine 21 is mounted in a space surrounded by the main pipe 4, center pipe 6, lower pipe 7, and down pipe 9. The engine 21 is mounted almost on the left-right center line C of the vehicle body, and has a cylinder 23 upright above the front part of the crankcase 22. This cylinder 23 is slightly inclined forward, and the rear part of the crankcase 22 The output shaft (not shown) from the transmission case 24 and the axles of the rear wheels 16, 16 are interlocked and connected by a transmission device (not shown).

Further, a fuel tank 26 is installed across the main pipe 4, a passenger seat 27 is placed on the seat pipe 5 behind the main pipe 4, and a cowling 31 that covers the vehicle body from above is attached. This cowling 31 has front fender parts 32, 32 on the front left and right sides.
The rear left and right sides are equipped with rear fender parts 33, 33, and the middle part is equipped with a fuel tank 26 and a seat 27.
The engine 21 is exposed below the side cowl part 34. Incidentally, from the side of the engine 21 of the lower pipe 7 is a step 36 for resting the feet of the passenger.
is installed protrudingly.

In the saddle type four-wheel vehicle 1 described above, the cooling fan 41 is disposed within a triangular space in side view surrounded by the head pipe 3, down pipe 9, and lower pipe 7, as shown in FIG.

The cooling fan 41 has blades 43 driven by an electric motor 42.
... is housed in a cylindrical shroud case 44, and a third
As shown in the figure, a grid-like mesh body 45 is provided, and the upper center of the case 44 is attached to the down pipe 9 and the lower left and right sides are attached to and supported by the lower pipes 7, 7, so that the cooling fan 41 is spaced in front of the engine 21. and equip it.

That is, a metal band 51 is bolted to the upper part of the down pipe 9 at the rear, a rubber bushing 53 is attached to a bolt 52 provided at the front part of the band 51, and a bracket 47 fixed to the upper center of the shroud case 44 is attached to the rubber bushing 53. and tighten the nut 54. Here, a recess 48 is formed in the rear part of the upper center of the case 44, and the down pipe 9 is passed through the recess 48.

Then, an under guard 55 is installed between the front parts of the left and right lower pipes 7, 7 so as to cover the lower part of the case 44, and a rubber bush 57 is attached to the bolt 56 installed at the left and right ends of the under guard 55.
Brackets 49, which are fixed and hanging down from the left and right sides of the lower part of the shroud case 44, are fitted into the rubber bushes 57, and the bushings 58 are fastened.

In this way, the cooling fan 41 is aligned with the left and right center line C of the vehicle body.
Consistent with the above, it is installed in front of the engine 21 and behind the axle position A of the left and right front wheels 13, 13.

The above-mentioned cooling fan 41 has blades 43...
is rotating.

Since the cooling fan 41 is provided in this way, when the oil temperature exceeds a certain temperature, the left and right front wheels 13, 13
Since the engine 21 can be forcibly cooled by the fan 41 provided in the running air path in addition to the running air from between the running air paths, the engine cooling performance can be satisfied especially when running at low speed. Therefore, it is possible to prevent heat from accumulating in the side cowl parts 34, 34 of the cowling 31, and the influence of heat on the occupant can be eliminated.

By the way, in the saddle-ride type four-wheel vehicle 1 in which the front projected area in the height direction cannot be increased because the vehicle height is inevitably limited by the riding posture, on the left and right of the front part of the cowling 31 that covers the vehicle body from above, Front fender parts 32, 32 that cover the front wheels 13, 13 having a relatively wide tread are integrally formed, and the front fender parts 32, 32 have a shape that goes around to the rear part of the front wheels 13, 13. The cooling fan 41, which is disposed between the front fender parts 32 and 32, is designed to protect the steps 36, 36 located behind the
Since the driving wind from the front is concentrated, engine 2
1, a sufficient cooling effect can be obtained.

Particularly when driving at low speeds, a step 36 is installed on the side of the engine 21 behind the cooling fan 41.
36, the feet of the occupants placed on the steps 36, 36 on both sides of the engine 21 can effectively prevent the cooling air from the fan 41 from escaping to the steps 36, 36 on the side of the engine 21. 21 can be turned to the rear.

Moreover, the cooling fan 41 is located behind the head pipe 3.
Because of this arrangement, the space behind the head pipe 3 and in front of the engine 21 can be effectively used while avoiding interference with the steering mechanism and suspension mechanism, and the amount of cooling air applied to the engine 21 can also be secured.

(Effects of the Invention) As described above, according to the present invention, the engine is located approximately at the center of the left and right sides of the vehicle body between the front wheels and the rear wheels, the steps located on both sides of the engine on the left and right sides of the vehicle body, the seats on the vehicle body, and the steps located on the left and right sides of the vehicle body. The vehicle is a saddle type four-wheeled vehicle equipped with a cowling that covers the engine from above, and the cooling fan for forcedly cooling the engine is located in front of the engine and behind the axles of the left and right front wheels, and at the front of the cowling. Because it is placed between the front fenders, which are integrally provided on the left and right sides and wrap around to the rear of the front wheels, the front fenders are integrated with the front part of the cowling and the left and right sides of the cowling and wrap around to the rear of the front wheels. The front fender section allows the driving wind from the front to be concentrated into the cooling fan, providing a sufficient cooling effect for the engine.
Particularly when driving at low speeds, the steps are placed on the sides of the engine behind the cooling fan, so the occupants' feet placed on the steps on both sides of the engine can
Cooling air from the fan can be effectively directed to the rear of the engine without escaping to the step side of the engine.

Therefore, in a saddle type four-wheeled vehicle, the engine cooling performance, which has been a problem in the past, especially when traveling at low speeds, can be satisfied.

[Brief explanation of drawings]

Fig. 1 is a side view of the saddle-ride type four-wheeled vehicle, Fig. 2 is a schematic plan view, Fig. 3 is a perspective view with the cowling etc. removed, and Fig. 4 is an enlarged side view of main parts with a part cut away. It is. In addition, in the drawing, 1 is a saddle type four-wheel vehicle, 3 is a head pipe, 7 is a lower pipe, 9 is a down pipe,
11 is a handle pipe, 13 is a front wheel, 16 is a rear wheel, 21 is an engine, 23 is a cylinder, 27 is a seat, 31 is a cowling, 36 is a step, 41
is a cooling fan, 42 is a motor, 43 is a blade, 44
is a case, 53 and 57 are rubber bushings, and 55 is an under guard.

Claims (1)

[Claims] 1 The vehicle body is equipped with wheels on the front, rear, left and right sides, the engine is mounted between the front wheels and the rear wheels, and approximately at the center of the left and right sides of the vehicle body, and there are steps on the left and right sides of the vehicle body for the passengers to place their feet on. In a saddle type four-wheel vehicle that has a passenger seat placed on the vehicle body and a cowling that covers the vehicle body from above, cooling fans for forced cooling of the engine are installed on the left and right in front of the engine. It is characterized by being located behind the axle of the front wheel of the cowling, and between the front fender parts which are integrally provided on the left and right sides of the front part of the cowling and extend around to the rear part of the front wheel. Engine cooling system for saddle-type four-wheel vehicles.