JP2017071289A - Car body side part structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce air resistance by allowing a travel wind that flows into a wheel house while a vehicle is travelling to be smoothly flown out of the wheel house.SOLUTION: In front of a car body side surface part 15 that forms a side surface of a car body 20, a fender 2 is arranged. A fender 2 defines a wheel house 6 in which a tire 7 is housed. In a region on the rear side of the fender 2, a front opening 10 penetrating the fender 2 is formed. On the car body side surface part 15, a rear opening 11 which penetrates the car body side surface part 15 at the back of the front opening 10 is formed. A front end part 13 of a ventilation pipe 12 communicates with the front opening 10, and a rear end part 14 communicates with the rear opening 11 and opens to the outside along a car width direction. The ventilation pipe 12 extends backward from the front end part 13 toward the rear end part 14. The front opening 10 is arranged further inside along the car width direction than a region facing a rear surface of the tire 7, in a rear side region of the fender 2.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle body side structure.

  Patent Document 1 discloses a fender liner provided with an arch body formed in an arc shape along the front-rear direction of the vehicle, and a flange body extending in the rear direction of the vehicle from the base end on the rear side of the arch body. Is described. The fender liner is assembled to the vehicle body so as to define a tire house for storing vehicle tires. The flange body is formed with a duct capable of sending running air, which is sent into the tire house as the tire rotates from the bottom side of the vehicle when the vehicle is running, to the bottom side in the rearward direction of the vehicle.

JP 2013-233877 A

  In the structure of Patent Document 1, since the inflow opening of the duct is formed at a position facing the tread surface of the tire, a wide space cannot be secured in front of the inflow opening of the duct. For this reason, traveling air (running wind) does not smoothly flow into the duct from the inside of the tire house (wheel house), and there is a possibility that a sufficient effect for reducing the air resistance may not be obtained.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle body side structure capable of reducing air resistance by smoothly flowing running wind flowing into a wheel house while the vehicle is running to the outside of the wheel house.

  In order to achieve the above object, the present invention is a vehicle body side structure in which a fender is disposed in front of a vehicle body side surface forming a vehicle body side surface, and a wheel house in which a tire is accommodated is defined by the fender. And a front opening, a rear opening, and a vent pipe. The front opening penetrates the fender in the rear region of the fender. The vent pipe has a front end portion that communicates with the front opening and a rear end portion that communicates with the rear opening and opens outward in the vehicle width direction, and extends rearward from the front end portion toward the rear end portion. The front opening is disposed on the inner side in the vehicle width direction than the region facing the rear surface of the tire in the rear region of the fender.

  In the above configuration, the traveling wind that has flowed into the wheel house during the vehicle travels from the front opening to the front end of the vent pipe, circulates in the vent pipe, and passes through the vent pipe from the rear end through the rear opening. Outflows outward in the width direction. In addition, since the front opening is disposed on the inner side in the vehicle width direction than the region facing the rear surface of the tire in the rear region of the fender, a sufficiently wide space can be secured in front of the front opening, and the wheel The running wind in the house flows smoothly into the front opening. Accordingly, the air resistance can be reduced by smoothly flowing out the traveling wind flowing into the wheel house while the vehicle is traveling.

  ADVANTAGE OF THE INVENTION According to this invention, the driving | running | working wind which flows in in a wheel house during vehicle travel can be smoothly flowed out of a wheel house, and air resistance can be reduced.

It is the perspective view which looked at the vehicle concerning one embodiment of the present invention from the slant front. It is the perspective view which looked at the fender of FIG. 1 from diagonally upward. It is principal part sectional drawing of the vehicle of FIG. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3.

  Hereinafter, a vehicle body side part structure according to an embodiment of the present invention will be described with reference to the drawings. In the following description, the front-rear direction is the front-rear direction of the traveling direction of the vehicle, and the left-right direction is the left-right direction when facing the front of the vehicle. In the figure, an arrow FR indicates the front, an arrow UP indicates the upper side, and an arrow IN indicates the inner side in the vehicle width direction.

  As shown in FIGS. 1 to 4, a vehicle (passenger car) 1 according to the present embodiment includes a plate-like vehicle body side surface portion 15 that forms the side surface of the vehicle body 20, and a vehicle body 20 disposed in front of the vehicle body side surface portion 15. And a fender 2 fixed to the side. The fender 2 is bent in the front-rear direction from both ends of the fender main body 3, the plate-shaped fender main body 3 that curves in an arch shape, the plate-shaped fender inner 4 that stands up and down on the inner side in the vehicle width direction of the fender main body 3. The front and rear flange portions 5 are integrally provided. The fender body 3 defines an upper side of the wheel house 6 in which the tire 7 is accommodated, and the fender inner 4 defines an inner side in the vehicle width direction of the wheel house 6. The upper side of the tread surface 7 a of the tire 7 faces the fender body 3, and the upper part of the inner side surface 7 b in the vehicle width direction of the tire 7 faces the fender inner 4. The rear flange portion 5 is coupled to the under panel 8 fixed to the vehicle body 20 side. The under panel 8 is disposed in a posture (for example, substantially horizontal) intersecting with the vertical direction, and extends rearward from the rear flange portion 5. The left and right front wheel wheel houses 6 will be described below, but the left and right rear wheel wheel houses may be configured similarly.

  A rectangular front opening 10 penetrating the fender body 3 is formed in a rear area (a rear area from the arch-shaped top portion 9) 3a of the fender body 3. The front opening 10 is arranged offset inward in the vehicle width direction from a region facing the rear surface (rear tread surface 7a) of the tire 7 facing the straight traveling direction in the rear region 3a of the fender main body 3. 3 extends from the top 9 to the rear flange 5 downward.

  A rectangular rear opening 11 penetrating in the vehicle width direction behind the front opening 10 is formed in the vehicle body side surface portion 15.

  Between the fender main body 3 and the vehicle body side part 15, the ventilation pipe 12 which divides | segments the ventilation path 17 of a rectangular-shaped cross section inside is arrange | positioned. The ventilation pipe 12 has a front end portion 13 that communicates with the front opening 10 and a rear end portion 14 that communicates with the rear opening 11, extends linearly rearward from the front end portion 13, and bends outward in the vehicle width direction. That is, the rear end portion 14 of the ventilation pipe 12 is opened to the outside in the vehicle width direction through the rear opening 11 at the side portion of the vehicle body 20 behind the front opening 10. In this embodiment, the front end portion 13 is fixed in close contact with the outer surface of the fender body 3 and the inner surface in the vehicle width direction of the fender inner 4, and the rear end portion 14 is in close contact with the inner surface in the vehicle width direction of the vehicle body side portion 15. Fixed in state. Note that the middle portion of the vent pipe 12 may be fixed to the vehicle body 20 side without fixing the front end portion 13 and / or the rear end portion 14 to the vehicle body 20 side.

  In the present embodiment, the width W in the vehicle width direction of the air passage 17 is set in the range of 100 mm to 150 mm, and the height H in the vertical direction of the air passage 17 is set in the range of 300 mm to 450 mm. How to set these is arbitrary.

  According to the present embodiment, the traveling wind that has flowed into the wheel house 6 during the traveling of the vehicle flows into the front end portion 13 of the ventilation pipe 12 from the front opening 10 and flows through the ventilation path 17 in the ventilation pipe 12. Then, it flows out from the rear opening 11 toward the outside in the vehicle width direction, and circulates on the side of the vehicle body 20 (on the outer surface of the vehicle body side surface portion 15) rearward. Thereby, the pressure generated at the rear part of the wheel house 6 is reduced, and the pressure of the traveling wind flowing on the side of the vehicle body 20 is also reduced. Further, since the front opening 10 is disposed on the inner side in the vehicle width direction of the rear region 3a of the fender body 3 than the region facing the rear surface of the tire 7, a sufficiently wide space is secured in front of the front opening 10. The traveling wind inside the wheel house 6 flows smoothly into the front opening 10. Accordingly, it is possible to reduce the air resistance by smoothly flowing the traveling wind flowing into the wheel house 6 to the outside of the wheel house 6 while the vehicle is traveling.

  Next, a decrease in air resistance received by the vehicle 1 having the front opening 10, the rear opening 11, and the vent pipe 12 will be described based on verification results using wind tunnel analysis.

  In this wind tunnel analysis, a wind tunnel in which a cross-sectional air region having a length of 3.2 m in the vertical direction and a length of 10 m in the vehicle width direction extends 33 m in the front-rear direction is configured on the computer, and the modeled vehicle is The front part of the vehicle is arranged in the center of the vehicle toward the entrance of the wind tunnel, and an air flow of 100 km / h is introduced from the entrance of the wind tunnel, thereby obtaining the air resistance that the vehicle traveling at 100 km / h receives from the front in the traveling direction. Is. The air resistance experienced by a vehicle is measured by the pressure loss, which is the pressure difference between the pressure at the wind tunnel inlet and the pressure at the wind tunnel outlet.

  First, an analysis model of a vehicle that does not have the front opening 10, the rear opening 11, and the ventilation pipe 12 was placed in the wind tunnel, and an analysis was performed by flowing an air flow of 100 km / h from the entrance of the wind tunnel.

  Next, an analysis model of the vehicle 1 having the front opening 10, the rear opening 11, and the ventilation pipe 12 according to the present embodiment was placed in the wind tunnel, and the analysis was performed by flowing an air flow of 100 km / h from the wind tunnel entrance.

  As a result of the analysis, the vehicle 1 having the front opening 10, the rear opening 11 and the vent pipe 12 according to the present embodiment has an air resistance (pressure loss) as compared with a vehicle having no front opening 10, the rear opening 11 and the vent pipe 12. ) Is reduced by about 1.7%, and it is verified that the air resistance received by the vehicle 1 can be effectively reduced by the front opening 10, the rear opening 11, and the ventilation pipe 12.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to the content of the said embodiment, Of course, in the range which does not deviate from this invention, an appropriate change is possible. . That is, it is needless to say that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

  The vehicle body side part structure of the present invention can be applied to various vehicles.

1: Vehicle (passenger car)
2: Fender 3: Fender body 3a: Rear region of fender body (rear region of fender)
4: Fender inner 6: Wheel house 7: Tire 8: Under panel 9: Top part 10 of fender body: Front opening 11: Rear opening 12: Vent pipe 13: Front end part 14 of vent pipe: Rear end part 15 of vent pipe: Car body side part 17: Ventilation path 20: Car body

Claims (1)

A vehicle body side structure in which a fender is disposed in front of a vehicle body side surface forming a side surface of the vehicle body, and a wheel house in which a tire is accommodated is defined by the fender,
A front opening through the fender in a rear region of the fender;
A rear opening penetrating the side surface of the vehicle body behind the front opening;
A vent pipe that has a front end portion that communicates with the front opening and a rear end portion that communicates with the rear opening and opens outward in the vehicle width direction and extends rearward from the front end portion toward the rear end portion; With
The front opening is disposed on the inner side in the vehicle width direction than the region facing the rear surface of the tire in the rear region of the fender.

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