JPH0858635A - Mud splashing prevention device - Google Patents

Abstract

PURPOSE: To reduce the degree of adhesion of mud, rain water and the like to the vicinity of the rear end face of a car by forming an air blowing port at the rear end face of a vehicle, taking in air obtained when the vehicle is running from an air inlet, and blowing it out from an air blowing port through an air passage. CONSTITUTION: When a negative area is produced near the rear end face 3a of a trunk lid 3 during the traveling of a car, fresh air is taken into an air passage 1b through an air inlet 1a and exhausted from the air outlet 1c through an air passage 1b because air pressure near the air inlet 1a is higher than that near an air outlet 1c. Because the exhausted air acts to increase the air pressure in the negative area produced near the rear end face 3a of the trunk lid, a force to suck mud, rain water and the like splashed by a rear wheel 6 is reduced so that the degree of adhesion of mud, rain water and the like to the vicinity of the rear end face 3a of the trunk lid can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drop-up prevention device, and more specifically, a drop-up prevention device for preventing a drop-up phenomenon such as a drop or rainwater caused by a decrease in air pressure near a rear end surface of a rear portion of a vehicle when the vehicle is running. A flip-up prevention device.

[0002]

2. Description of the Related Art When a vehicle is driven in the rain or after it rains, an air flow around the vehicle causes a region where the air pressure decreases near the rear end surface of the rear of the vehicle. An airflow flows from the lower part of the vehicle toward such a negative pressure region. And
In such an ascending airflow, there are cases where muddy water, rainwater, and the like scattered by the rear wheels of the automobile are attracted and adhere to the vicinity of the rear end face of the automobile and become dirty.

The present invention has been made in view of the above problems, and is not limited to an automobile, but it is possible to positively suppress an ascending air current during traveling of the vehicle so that the rear wheels can be controlled. The purpose is to prevent the adhered near the rear end face such as spilled water and rainwater.

[0004]

According to a first aspect of the present invention, there is provided an air blowout port on a rear end surface of a rear portion of a vehicle, and a pressure coefficient during traveling of the vehicle has an air outlet on an outer surface of the vehicle. An air intake is provided at a portion near the air outlet where the pressure coefficient is larger than the pressure coefficient, and the air intake and the air outlet are connected by an air passage.

The second drop-up prevention device according to the present invention is a drop-up prevention device attached to the outer surface of the rear part of the vehicle, and the rear end face is arranged near the rear end of the rear part of the vehicle. Has an air outlet, and is located near the front end of the rear part of the vehicle, where the pressure coefficient when the vehicle is running is larger than the pressure coefficient near the air outlet, and the air intake is provided. However, the air inlet and the air outlet are connected by an air passage.

[0006]

In the first and second drop-up prevention devices, when a negative pressure region is generated near the rear end surface of the rear part of the vehicle when the vehicle is traveling, the air pressure near the air intake port is changed to the air pressure near the air outlet port. Coupled with the above, the inside air in the air passage is sucked into the negative pressure region through the air outlet, and accordingly, the outside air is taken into the air passage through the air inlet, and the air passage After that, it will be blown out from the air outlet. The blown air acts in the direction of increasing the air pressure in the negative pressure region generated near the rear end surface of the rear portion of the vehicle.

[0007] When the air pressure in the negative pressure region rises, the ascending airflow that tries to flow into the negative pressure region from the lower portion of the vehicle becomes weak. The weak updraft has a small force to attract the mist and rainwater scattered by the rear wheels of the vehicle. For this reason, the degree to which muddy water, rainwater, and the like adhere to the vicinity of the rear end surface of the rear portion of the automobile is reduced.

The second drop-up prevention device is attached to the outer surface of the rear part of the vehicle. For this reason, it is also possible to have an integral structure with the spoiler for improving running stability.

[0009]

An embodiment of the present invention will be described below with reference to the drawings.

(1) First Embodiment (FIGS. 1 to 3) FIGS. 1 and 2 show a drop-up prevention device according to this embodiment.

In FIGS. 1 and 2, the drop-up prevention device 1 is formed inside the trunk lid 3 of the rear part 2 of the vehicle, and comprises an air intake 1a, an air passage 1b, and an air outlet 1c. ing.

The air outlet 1c is a rear end surface 3 of the trunk lid 3 which forms a negative pressure area when the vehicle is running.
a, for example, formed directly below the tail lamp 3b,
It is covered with a grill 4 to prevent dust from entering.

The air intake 1a is based on the distribution curve of the pressure coefficient Cp on the outer surface of the vehicle when the vehicle is running (see FIG. 3). It is formed at a portion larger than the pressure coefficient Cp, for example, at the front end portion e (FIG. 3) of the trunk lid 3, and is covered with a grill 5 to prevent dust and the like from entering.

The air passage 1b is formed along the back surface of the trunk lid 3 and connects the air intake 1a and the air outlet 1c. The width of the air passage 1b in the left-right direction is
The width is set to be substantially the same as the width of the air intake 1a and the air outlet 1c.

Next, the operation of the drop-up prevention device 1 configured as described above will be described.

When a negative pressure region is generated near the rear end face 3a of the trunk lid 3 when the vehicle is running, the air pressure near the air intake port 1a is higher than the air pressure near the air outlet port 1c, and the air pressure in the air passage 1b is increased. The inside air is sucked into the negative pressure region through the air outlet 1c, and accordingly, the outside air is taken into the air passage 1b through the air intake 1a,
It comes to be blown out from the air outlet 1c through the air passage 1b. This blown air is used for the rear end surface 3a of the trunk lid.
It acts in the direction of increasing the air pressure in the negative pressure region generated in the vicinity. When the air pressure in the negative pressure area rises, the ascending airflow A that tries to flow from the lower part of the vehicle toward this negative pressure area
(Fig. 1) is weak. The weak updraft A has a small force for attracting muddy water, rainwater, and the like scattered by the rear wheel 6 of the automobile. For this reason, the degree of adhesion of muddy water, rainwater, and the like near the rear end face 3a of the trunk lid is reduced.

(2) Second Embodiment (FIG. 4) FIG. 4 shows a drop-up prevention device 1 according to this embodiment.

In FIG. 4, a device for preventing flip-up of a mist 1
Has an integral structure with the spoiler 7 for ensuring running stability, and the outer surface 3 of the trunk lid 3 of the rear part 2 of the vehicle is
It is attached to c and is composed of an air intake 1a, an air passage 1b, and an air outlet 1c, as in the first embodiment.

The air outlet 1c is formed on the rear end surface 1d which forms a negative pressure area when the vehicle is running,
Similar to the first embodiment, it is covered with a grill 4 to prevent dust from entering.

Like the first embodiment, the air intake 1a is based on the distribution curve (see FIG. 3) of the pressure coefficient Cp of the outer surface of the vehicle when the vehicle is running, and
The pressure coefficient Cp when the vehicle is running is larger than the pressure coefficient Cp in the vicinity of the air outlet 1c, for example, a part facing the front end e (FIG. 3) of the trunk lid 3 to prevent dust from entering. Because it is covered with grill 5.

The air passage 1b connects between the air intake 1a and the air outlet 1c, as in the first embodiment.

The drop-up prevention device 1 constructed as described above operates similarly to the first embodiment. That is,
When a negative pressure area is generated near the rear end face 1d when the vehicle is running,
Coupled with the fact that the air pressure in the vicinity of the air intake port 1a is higher than the air pressure in the vicinity of the air outlet port 1c, the inside air in the air passage 1b is sucked into the negative pressure region through the air outlet port 1c, and accordingly, the outside air Passes through the air intake 1a and the air passage 1
b is introduced into the air passage 1b and passes through the air passage 1b to the air outlet 1
It will come out from c. The blown air acts in the direction of increasing the air pressure in the negative pressure region generated near the rear end face 1d. When the air pressure in the negative pressure region rises, the ascending airflow that tries to flow into the negative pressure region from the lower part of the vehicle becomes weak. The weak updraft has a small force to attract the mist, rainwater, etc. scattered by the rear wheels of the automobile. For this reason, muddy water, rainwater, etc.
The degree of adhesion around a is reduced.

Further, in this embodiment, since the structure is integrated with the spoiler 7, compared with the case where the spoiler 7 is provided separately,
The number of parts can be reduced, and the work of attaching the spoiler 7 becomes unnecessary.

(3) Third Embodiment (FIG. 5) FIG. 5 shows a slide-up prevention device 1 according to this embodiment.

In FIG. 5, the device 1 for preventing the flip-up of a drop
Is configured such that a blower fan 8 is installed in the air passage 1b near the air outlet 1c, and by rotating the blower fan 8, air is forcibly blown out from the air outlet 1c in an auxiliary manner. And other configurations are first
It is similar to the embodiment.

Therefore, according to this embodiment, the upward airflow toward the rear end surface 3a of the trunk lid can be further suppressed, and the rear end surface 3a of the trunk lid such as muddy water and rainwater can be further suppressed.
Adhesion to the vicinity can be prevented more effectively.

In each of the above embodiments, the air intake port 1a is arranged at the front end portion of the trunk lid 3 or at a portion facing the front end portion, but the position of the air intake port 1a is not limited to this. However, the air intake 1a can be freely arranged on the front side or the side surface of the vehicle on the positive pressure side with respect to the air outlet 1c.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a throw-up prevention device according to a first embodiment.

FIG. 2 is a perspective view of the device.

FIG. 3 is a distribution diagram of a pressure coefficient Cp on an outer surface of an automobile for explaining the device.

FIG. 4 is a perspective view of a throw-up prevention device according to a second embodiment.

FIG. 5 is a cross-sectional view of a throw-up prevention device according to a third embodiment.

[Explanation of symbols]

 1 Drop-up prevention device 1a Air intake 1b Air passage 1c Air outlet 2 Rear of vehicle (rear of vehicle) 3a Rear end of trunk lid (rear of rear of vehicle)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mutsuya Kojiya 1-1-1, Showa-cho, Kariya city, Aichi Prefecture Nihondenso Co., Ltd.

Claims (2)

[Claims] 1. An air outlet is provided on a rear end surface of a rear portion of a vehicle, and an air intake is provided on a portion of an outer surface of the vehicle where a pressure coefficient during traveling of the vehicle is larger than a pressure coefficient near the air outlet. An air-passage connection between the air intake port and the air outlet port is provided. 2. A drop-up prevention device attached to an outer surface of a rear part of a vehicle, the device having an air outlet on a rear end face arranged near the rear end of the vehicle rear part, and near a front end of the rear part of the vehicle. An air intake at a portion where the pressure coefficient when the vehicle is running is larger than the pressure coefficient near the air outlet, between the air inlet and the air outlet. A device for preventing bounce-up of a mud that is connected by an air passage.