JP3607965B2 - Automotive brake cooling structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a brake cooling structure for an automobile, and more particularly to a structure for cooling a front wheel of a passenger car.
[0002]
[Prior art]
A first guide provided in front of the front wheel of the automobile that generates an air flow that is concave with respect to the road surface, and an inner side of the front wheel that generates an air flow that is convex with respect to the road surface. A brake cooling structure for an automobile is proposed (German Patent No. 4334409).
[0003]
[Problems to be solved by the invention]
In the cooling structure, when the air flows from the front to the rear, that is, when the automobile travels forward, the air flow that flows along the second guide becomes convex with respect to the traveling road surface. It gets faster and gets slower after it gets the best. Along with this, the static pressure of the passage in which the air flow occurs gradually decreases, and gradually increases after reaching the minimum. The air flow is easy to peel off in the process of increasing the pressure, and especially the air flow is easy to peel off at a place away from the wall surface. . Therefore, the cooling effect of the brake is not sufficient.
[0004]
The present invention provides a brake cooling structure for an automobile that can increase the flow rate of air toward the inside of the front wheels and enhance the cooling effect of the brake.
[0005]
[Means for Solving the Problems]
The present invention provides a first guide provided in front of a front wheel of an automobile that generates an air flow that is concave with respect to the traveling road surface, and the front wheel that generates an air flow that is convex with respect to the traveling road surface. It is the brake cooling structure of a motor vehicle provided with the 2nd guide provided toward the inner side. The second guide is formed in a shape that is surrounded on three sides and is open at the bottom, and further has a rectifying means that closes the opening below the second guide at the outlet of the second guide. The rectifying means is composed of a plate-like member protruding toward the traveling road surface.
The plate-like member is attached to the front under cover of the automobile in front of the front wheel, and the member also serves as the first guide.
[0007]
[Action and effect]
When the automobile travels forward, air flows backward through the first guide and the second guide. The air flow flowing backward from the first guide is mainly directed to the traveling road surface, and the amount reaching the front wheels is suppressed. The air flow flowing rearward from the second guide is rectified at the outlet of the second guide and directed to the front wheel brake.
[0008]
Since the air flow directed to the brake through the second guide is rectified by the rectifying means and the increase in static pressure is suppressed, separation of the air flow when leaving the second guide can be reduced. As a result, it is possible to increase the flow rate of air facing the inner side of the front wheel, and the cooling performance of the brake can be improved.
[0009]
Since the air flow guided rearward by the first guide is mainly directed to the traveling road surface, there is no pressure fluctuation on both sides of the front wheel, which is likely to occur when the air flow directly hits the front wheel. Thereby, the wobbling of the front wheels can be suppressed, and the steering stability can be improved.
[0010]
According to a preferred aspect, the flow rectifying means comprising a plate-like member projecting downward also serves as the first guide, so that two functions can be achieved by a single member.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIG. 1 showing a perspective state, FIG. 2 showing a cross-sectional state, and FIG. And a second guide 16 provided toward the inside of the front wheel 12 for generating an air flow that is convex with respect to the traveling road surface 10. 16 has a rectifying means 18.
[0012]
In the illustrated embodiment, the rectifying means 18 includes a plate-like member 22 that is attached to the front under cover 20 of the automobile in front of the front wheels 12 and protrudes toward the traveling road surface 10, and the member 22 is a first guide. Also serves as 14. That is, the member 22 has a length larger than the width of the front wheel 12 and is attached to the front under cover 20 in front of the front wheel 12 to become the first guide 14, and further, the second guide 16 in the vehicle width direction. It is attached to the front under cover 20 inward, and serves as a rectifying means 18 at the second guide 16 site. The member 22 can be formed of a steel plate, a rubber plate or a resin plate, and is attached to the front under cover 20 by welding or bolting.
[0013]
As shown in FIG. 2, the first guide 14 generates an air flow 24 that is concave with respect to the traveling road surface 10. That is, the air flow 26 directed substantially horizontally is abutted against the first guide 14 and bent in the direction toward the traveling road surface 10 to become an air flow 24 that is concave with respect to the traveling road surface 10.
[0014]
The second guide 16 is formed in a shape that is surrounded on three sides and opened downward. In the embodiment shown in FIGS. 2 and 3, the second guide 16 is formed at a portion inward of the front wheel 12 of the front under cover 20, and is a top surface curved in a convex shape toward the traveling road surface 10. 28 and side surfaces 29 and 30 provided on both sides of the top surface 28, and the lower part is an opening. As a result, the air flow 26 that is directed substantially horizontally is bent along the top surface 28 to become an air flow 32 that is convex with respect to the traveling road surface 10. The second guide 16 is formed so that the air flow 32 that is convex with respect to the traveling road surface 10 faces the disc of the front wheel 12 that receives a braking force by the caliper 34 of the disc brake, for example.
[0015]
In order to help ensure that the air flow exiting the second guide 16 is directed to the disk, a brake air scoop 36 is preferably located near the disk. The brake air scoop 36 is fixed to a non-rotating portion of the disc brake.
[0016]
The rectifying means 18 blocks the opening below the second guide at the outlet 17 of the second guide 16. Therefore, in this part, the second guide 16 has a form surrounded on all sides. By arranging the rectifying means 18 at the outlet 17 of the second guide 16, the air flow 32 can be rectified, and separation that occurs at a portion 31 where the air flow 32 is away from the second guide 16 can be suppressed.
[0017]
When the first guide 14 is formed by the member 22 and the rectifying means 18 is used, the height of the member 22 can be set to 30 to 50 mm. The dimensions of the second guide 16 at the outlet 17 can be set to a height of about 30 to 60 mm and a width of about 50 to 80 mm.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a brake cooling structure for an automobile according to the present invention.
FIG. 2 is a cross-sectional view taken along line 2-2 of FIG.
FIG. 3 is a bottom view of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Traveling road surface 12 Front wheel 14 1st guide 16 2nd guide 17 Outlet 18 Rectification means 20 Front under cover 22 Plate-shaped member

Claims (2)

A first guide ( 14 ) provided in front of the front wheel (12) of the automobile that generates an air flow that is concave with respect to the road surface, and an air flow that is convex with respect to the road surface; A brake cooling structure for an automobile, comprising a second guide (16) provided toward the inside of the front wheel,
The second guide is formed in a shape that is surrounded on three sides and is open at the bottom, and further, a rectifying means that closes the opening below the second guide at the outlet (17) of the second guide ( 18) has a,
The rectifying means is a brake cooling structure for an automobile, comprising a plate-like member (22) protruding toward the traveling road surface . The automobile according to claim 1, wherein the plate-like member (22) is attached to a front under cover (20) of the automobile in front of the front wheel , and the member also serves as the first guide ( 14 ). Brake cooling structure.

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