JP2002106345A - Cooling structure of radiator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the cooling efficiency of a radiator by utilizing a suction box situated in the rear of a radiator. SOLUTION: An upper radiator 17 and a lower radiator 18 are vertically situated at the inside of a fairing 8 and a suction box 15 is situated in the rear thereof. The upper radiator 17 has a back 22 formed in the shape of a curve protruding toward a rear. A front upper part 21 of the suction box 15 opposed thereto is formed in the shape of a curve protruding toward a front and spreading escape spaces 23 are formed on both the right and the left end sides thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an advantageous structure for improving the cooling efficiency of a radiator.

[0002]

2. Description of the Related Art In Japanese Patent Publication No. 3-73732, an upper radiator and a lower radiator are arranged inside a front cowl with a vertical interval, and an intake system component is arranged so as to face a gap space between the upper radiator and the lower radiator. The structure is shown.

[0003]

By the way, in order to improve the cooling efficiency of the radiator, the outside air taken into the front cowl is guided to the radiator as much as possible, and the exhaust air passing through the radiator is immediately caused to flow backward. It is necessary to improve the slipperiness.

However, when an intake system component or the like is disposed behind the radiator, it may be difficult for the intake system component or the like to function as a wall against the exhaust air of the radiator to improve the escape property. Therefore, an object of the present invention is to improve the cooling efficiency of a radiator using an intake box.

[0005]

To solve the above-mentioned problems, a cooling structure for a radiator according to the present invention is provided in a vehicle having a radiator and an intake box disposed behind and surrounding an intake system component. The rear face of the intake box has a curved shape that is convex toward the rear, and the front face of the intake box that faces the rear of the rear face has a curved shape that is convex forward.

[0006]

The rear surface of the radiator has a curved shape that is convex rearward, and the front surface of the intake box disposed behind has a curved shape that is convex forward. An escape space that expands toward the head is formed. Therefore, the cooling air that has passed through the radiator flows toward the end along the curved shape of the intake box, and quickly flows backward by flowing through a gradually widening escape space. Therefore, the removability is improved, and the cooling efficiency of the radiator can be improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to the drawings. 1 is a side view of a motorcycle to which the present embodiment is applied, FIG. 2 is a view showing a positional relationship between a radiator and an intake box in a side view, FIG. 3 is a sectional view taken along line 3-3 of FIG. 1, and FIG. FIG.
5 is a sectional view taken along line 4-4 of FIG. 1, and FIG. 5 is a sectional view taken along line 5-5 of FIG.

In FIG. 1, this motorcycle is configured for racing, and reference numeral 1 is a front wheel, 2 is a front fork,
3 is a pair of left and right body frames, 4 is a rear swing arm, 5 is a rear wheel, 6 is a fuel tank, 7 is a seat, and 8 is a fairing.

The body frame 3 has a two-cycle water-cooled V-type 2
A cylinder engine 10 is suspended and supported, and its upper cylinder 11
And the bank portion of the lower cylinder 12 are located toward the front of the vehicle body,
Here, vaporizers 13 and 14 connected to the respective intake ports are arranged. These vaporizers 13 and 14 are housed in an intake box 15 arranged in a bank. The intake box 15 is connected to the rear end of an intake duct 16 formed obliquely downward and rearward along the lower left and right sides of the fairing 8 on both the right and left sides, so that ram pressure is applied to the carburetors 13 and 14.

An upper radiator 1 is provided in front of the intake box 15.
The lower radiator 7 and the lower radiator 18 are arranged at intervals above and below to cool the engine 10. In the side view of the drawing, the intake duct 16 forms a substantially linear passage by passing between the upper radiator 17 and the lower radiator 18, and the upper radiator 17 is above the intake duct 16 and the lower radiator 18 is below the intake duct 16. To be placed. Exhaust pipe 1 of upper cylinder 11
9 a extends rearward above the engine 10, and an exhaust pipe 19 b of the lower cylinder 12 extends rearward below the engine 10.

As shown in FIG. 2, the lower portion 20 of the front surface of the intake box 15 has a curved shape that is convex rearward.
The front surface of the upper radiator 17 and the front surface of the lower radiator 18 are connected by a substantially continuous curved surface by entering between the lower radiator 7 and the lower radiator 18. In addition, the front wheel 1 is disposed close to the upper limit stroke trajectory 1a and close to the limit of the road clearance. The upper front portion 21 of the intake box 15 behind the upper radiator 17 has a curved shape whose upper side is gradually directed rearward, and forms a clearance space 23 whose upper portion is enlarged with the rear surface 22 of the upper radiator 17.

As shown in FIG. 3, the upper radiator 17 and the intake box 15 are arranged inside the fairing 8, and a large air introduction port 24 is opened in front of the fairing 8, so that the traveling wind W is directed to the upper radiator 17. It is leading. The air intake duct 16 is located inside the left and right walls of the fairing 8.
Is opened. The upper radiator 17 has a curved shape that is convex toward the rear, and has a concave front surface, so that it can efficiently receive the traveling wind W. Although not clear in this drawing, the lower radiator 18 has the same structure.

The intake box 15 located behind the upper radiator 17 has a front upper portion 21 having a curved shape that is convex forward, and a central portion is disposed close to the center of the rear surface 22 of the upper radiator 17. The space between the upper portion 21 and the back surface 22 of the upper radiator 17 is a clearance space 23 that expands toward both left and right sides. Reference numeral 26 in the figure denotes an engine hanger that extends downward from the lower left and right of the body frame 3 and supports the engine 10.

As shown in FIGS. 4 and 5, the vaporizer 13,
The suction port 27 is close to the front upper portion 21 with a minimum necessary clearance, and the suction port 28 of the vaporizer 14 is also close to the front upper portion 21 with a minimum necessary clearance. Therefore, the upper radiator 17 and the intake box 15 are brought close to each other while ensuring the load clearance, so that the capacity of the intake box 15 is secured to a required size.

Next, the operation of this embodiment will be described. As shown in FIG. 3, since the upper radiator 17 has a curved shape that is convex backward, and the intake box 15 has a curved shape that is convex forward, the rear surface 22 of the upper radiator 17 and the upper front surface 2 of the intake box 15 are formed.
A clearance space 23 is formed between the clearance space 1 and the left and right sides. Therefore, the cooling air that has passed through the upper radiator 17 flows into the escape space 23 in the direction of the end, which is guided by the upper front portion 21 of the intake box 15 as shown by the arrow, and quickly flows backward.

Further, as shown in FIG. 2, the upper radiator 1
The clearance space 23 between the rear surface 22 of the suction box 15 and the front upper portion 21 of the intake box 15 expands upward, and the front upper portion 21 also has a curved shape in the vertical direction.
Is passed through the upper front portion 21 of the intake box 15 and quickly flows upward. Therefore, the removability is significantly improved, and the cooling efficiency of the upper radiator 17 can be improved.

Moreover, the upper radiator 17, the intake box 1
5 and the lower radiator 18 are arranged close to the road clearance limit of the front wheel 1, and the intake box 15 is moved to the upper radiator 1
7 and the inlet 27 of the carburetor 13 and the inlet 28 of the carburetor 14 close to the front upper part 21 and the front lower part 20, so that the intake box 15 can have a large capacity.

Further, as shown in FIG.
Is connected to the intake box 15 through the space between the upper radiator 17 and the lower radiator 18, so that the intake duct 16 can be made a more straightened flow path, the intake airflow resistance is reduced, and the intake efficiency is improved. it can. In addition, the intake duct 16 is disposed along the left and right inner side surfaces of the fairing 8, and cannot prevent the flow of the traveling wind W taken into the inlet 25.

Further, as shown in FIG. 2, the lower front portion 20 of the intake box 15 is connected to an upper radiator 17 and a lower radiator 18.
And the upper radiator 17 and the lower radiator 18 have a substantially continuous curved surface, so that the traveling wind W taken in from the inlet 25 flows to the lower radiator 18 below to reduce the cooling efficiency of the lower radiator 18. Can be improved.

The present invention is not limited to the above-described embodiment, but can be variously modified and applied. For example, the intake box may be a box-shaped part of an intake system such as an air cleaner. Further, as an intake system component, there is a fuel injection device in addition to the carburetor.

[Brief description of the drawings]

FIG. 1 is a side view of a motorcycle with a race specification to which the present embodiment is applied.

FIG. 2 is a diagram showing a side view arrangement relationship between a radiator and an intake box.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is a sectional view taken along line 4-4 of FIG. 1;

FIG. 5 is a sectional view taken along line 5-5 of FIG. 1;

[Explanation of symbols]

1: front wheel, 8: fairing, 10: 2 cycle water cooling V
Type two-cylinder engine, 11: upper cylinder, 12: lower cylinder, 1
3: vaporizer, 14: vaporizer, 15: intake box, 1
6: intake duct, 17: upper radiator, 18: lower radiator, 20: lower front of intake box, 21: upper front of intake box, 22: rear of upper radiator

Claims (2)

[Claims] 1. A vehicle comprising a radiator and an intake box disposed behind and surrounding an intake system component.
The rear surface of the radiator has a curved shape that is convex rearward,
A cooling structure for a radiator, characterized in that a front surface of the intake box facing rearward and rearward has a curved shape that protrudes forward. 2. The vehicle body cover encloses left and right sides of the radiator and the intake box with a vehicle body cover that opens forward, divides the radiator into upper and lower parts, and introduces a duct for introducing outside air into the intake box. The radiator according to claim 1, wherein the radiator is arranged along the inner side of the side of the radiator, and connected to the intake box through below the upper radiator in a side view, and the lower radiator is arranged below the duct. Cooling structure.