JPH1143075A - Brake cooling structure of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brake cooling structure of an automobile which can increase the flow rate of the air directing to the inner side of a front wheel, and can improve the cooling effect of a brake. SOLUTION: This brake cooling structure of an automobile is provided with the first guide 14 furnished at the front part of the front wheel 12 of the automobile, and generating an air flow made in a recessed form to a running road surface 10; and the second guide 16 furnished directing to the inner side of the front wheel, and generating an air flow made in the projecting form to the running road surface 10. In this case, the second guide 16 is formed in a form surrounding three sides, and opening at the lower side, and furthermore, a rectifying means 18 to block the opening at the lower side at the outlet of the guide is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field 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]

2. Description of the Related Art A first guide provided in front of a front wheel of an automobile for generating an air flow which becomes concave with respect to a traveling road surface, and an air flow which becomes convex with respect to the traveling road surface, There has been proposed a brake cooling structure for a motor vehicle having a second guide provided toward the inside of the front wheel (DE 4333409).

[0003]

In the cooling structure, when the air flows from the front to the rear, that is, when the vehicle moves forward, the airflow flowing along the second guide is convex with respect to the running road surface. As a result, the flow velocity gradually increases, and then gradually decreases after peaking. Accordingly, the static pressure in the passage in which the air flow is generated gradually decreases, and after the minimum, gradually increases. The air flow is
In the cooling structure according to the proposal, the loss due to the separation is large, and the flow rate of the air directed toward the inside of the front wheel is small, since the separation is easy in the pressure increasing process, and particularly in the place where the air flow separates 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, which can increase the flow rate of air directed toward the inside of the front wheels and enhance the brake cooling effect.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a first guide provided in front of a front wheel of an automobile for generating an airflow which is concave with respect to a road surface, and a first guide which is convex with respect to the road surface. And a second guide provided toward the inside of the front wheel to generate an air flow. The second guide is surrounded on three sides,
It is formed in a shape with a lower opening, and further has a flow straightening means for closing an opening below the guide at an outlet of the guide.

[0006] The rectifying means is preferably attached to a front under cover of the vehicle in front of the front wheels and comprises a member protruding toward a traveling road surface. In this case, the member also serves as the first guide. .

[0007]

When the vehicle travels forward, air flows backward through the first guide and the second guide. First
The airflow flowing backward from the guide is mainly directed to the traveling road surface, and the amount of air reaching the front wheels is suppressed. The airflow flowing backward 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 via the second guide is rectified by the rectification means and the rise of the static pressure is suppressed, the separation of the air flow when leaving the second guide can be reduced. As a result, the flow rate of air directed toward the inside of the front wheels can be increased, and the cooling performance of the brake can be enhanced.

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 tends to occur when the air flow directly hits the front wheel. As a result, the front wheels can be prevented from wobbling, and the steering stability can be improved.

According to a preferred embodiment, the rectifying means comprises a member protruding downward, and this member also serves as the first guide, so that two functions can be achieved by a single member.

[0011]

1 is a perspective view, FIG. 2 is a cross-sectional view, and FIG. 3 is a bottom view of the brake cooling structure. A first guide 14 provided in front of the front wheel 12 of the vehicle, and a second guide 16 provided toward the inside of the front wheel 12 for generating an airflow which is convex with respect to the traveling road surface 10. , And the second guide 16 has a rectifying means 18.

In the embodiment shown, the rectifying means 18 comprises a plate-like member 22 which is attached to a front undercover 20 of the vehicle in front of the front wheels 12 and protrudes toward the traveling road surface 10, and the member 22 is a One guide 14 is also used. That is, the member 22 has a length greater than the width of the front wheel 12, and the front under cover 20 is positioned in front of the front wheel 12.
The second guide 16 is attached to the front under cover 20 inward in the vehicle width direction of the second guide 16, and the portion of the second guide 16 serves as rectifying means 18. The member 22 is formed of a steel plate.
It can be formed of a rubber plate or a resin plate, and is attached to the front under cover 20 by welding or bolting.

The first guide 14 is, as shown in FIG.
An air flow 24 that is concave with respect to the traveling road surface 10 is generated. That is, the air flow 2 oriented substantially horizontally
The air flow 6 collides with the first guide 14 and is bent toward the traveling road surface 10 to form an air flow 24 that is concave with respect to the traveling road surface 10.

The second guide 16 is formed so as to be surrounded on three sides and open downward. In the embodiment shown in FIGS. 2 and 3, the second guide 16 is formed at a portion of the front under cover 20 that is inside the front wheel 12,
It comprises a top surface 28 convexly curved toward the traveling road surface 10, and side surfaces 29 and 30 provided on both sides of the top surface 28,
The lower part is an opening. As a result, the substantially horizontal airflow 26 is bent along the top surface 28,
The air flow 32 becomes convex with respect to the traveling road surface 10.
The second guide 16 is formed such that an air flow 32 which is convex with respect to the traveling road surface 10 is directed to a disk of the front wheel 12 which receives a braking force by a caliper 34 of a disk brake, for example.

Preferably, a brake air scoop 36 is located near the disk to help ensure that the air flow exiting the second guide 16 is directed to the disk. The brake air scoop 36 is fixed to the non-rotating part of the disc brake.

The rectifying means 18 closes the opening below the second guide at the outlet 17 of the second guide 16. Therefore, the second guide 16 has a form surrounded on all sides at this portion. The rectifying means 18 is connected to the second guide 1
By arranging the air flow 32 at the outlet 17, the air flow 32 can be rectified, and separation occurring at the portion 31 where the air flow 32 is separated from the second guide 16 can be suppressed.

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 size of the second guide 16 at the outlet 17 is 30 height.
To about 60 to 60 mm, and the width to about 50 to 80 mm.

In the embodiment shown in FIG. 4, the brake cooling structure includes a member 40 projecting from the front under cover 20 toward the road surface 10. The member 40 has a substantially triangular cross section and extends a predetermined length in the vehicle width direction. The member 40 is similar to the member 22 of FIG.
The first guide 42 is attached to the front under cover 20 in front of the front wheel 12, and generates an air flow 44 that is concave with respect to the traveling road surface 10. The member 40 further extends inward beyond the second guide 16 and is attached to the front undercover 20. A notch 45 is provided at a position where the member 40 crosses the second guide 16. As a result, the member 40 is connected to the outlet 17 of the second guide 16.
Rectifying means 46, which closes the opening below the second guide 16. Thereby, the second guide 16
Generates an air flow 48 that is convex with respect to the traveling road surface 10, and the rectifying means 46 suppresses separation of the air flow 48.

[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 sectional view taken along line 2-2 of FIG.

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is a sectional view similar to FIG. 2, showing another embodiment of the vehicle brake cooling structure according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Road surface 12 Front wheel 14,42 1st guide 16 2nd guide 17 Outlet 18,46 Rectification means 20 Front under cover 22,40 Member

Claims (2)

[Claims] A first guide provided in front of a front wheel of an automobile for generating an air flow that is concave with respect to a traveling road surface, and a first guide that generates an air flow that is convex with respect to the traveling road surface; A second guide provided toward the inside of the front wheel, comprising: a brake cooling structure for an automobile, wherein the second guide is formed in a shape surrounding three sides and opening downward. A brake cooling structure for a motor vehicle, comprising: a rectifying means for closing an opening below the guide at an outlet of the second guide. 2. The rectifying means is attached to a front under cover of a vehicle in front of the front wheels, and includes a member protruding toward a traveling road surface, and this member also serves as the first guide. Item 2. An automotive brake cooling structure according to Item 1.