JP2020055507A - Rear swirl flow control air resistance reduction device - Google Patents

Rear swirl flow control air resistance reduction device Download PDF

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JP2020055507A
JP2020055507A JP2018196200A JP2018196200A JP2020055507A JP 2020055507 A JP2020055507 A JP 2020055507A JP 2018196200 A JP2018196200 A JP 2018196200A JP 2018196200 A JP2018196200 A JP 2018196200A JP 2020055507 A JP2020055507 A JP 2020055507A
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air resistance
vehicle
air
reduction device
resistance reduction
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喜幸 児玉
Yoshiyuki Kodama
喜幸 児玉
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/82—Elements for improving aerodynamics

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Abstract

To solve such problems that a box-shape vehicle such as a truck has large air resistance at traveling which adversely affects fuel economy and a loading space dimension is reduced in a vehicle of which whole length is regulated by a large roof spoiler.SOLUTION: A rear swirl flow control air resistance reduction device includes: a plurality of opening parts in a vehicle rear face part; and an air chamber for connecting them to each other, thereby reducing a difference in air pressure at a surface of a vehicle body rear part; thus a turbulent flow in the vehicle body rear part is reduced.SELECTED DRAWING: Figure 1

Description

発明の詳細な説明Detailed description of the invention

本発明は自動車の車体後部に設置され、走行時における空気抵抗を軽減する自動車の空気抵抗低減装置に関し、特に箱型形状の車両に効果的な技術に関する。The present invention relates to an air resistance reducing device for an automobile, which is installed at a rear portion of a vehicle body of an automobile and reduces air resistance during traveling, and particularly to a technology effective for a box-shaped vehicle.

自動車の燃費向上の観点から、自動車走行時の空気抵抗を低減させることが望ましい。
箱型形状の車両は後面が垂直平面になっており、走行時に発生する空気抵抗が特に大きい。From the viewpoint of improving the fuel efficiency of an automobile, it is desirable to reduce the air resistance when the automobile is running.
The rear surface of a box-shaped vehicle is a vertical plane, and the air resistance generated during traveling is particularly large.

車体の上・側面に沿って流れる気流の状態を制御するためには、車体形状全体の変更が必要になる。車体寸法には規制がある為、全長が伸びると積載量が減少するなど大幅な形状変更は困難である。例えば、ルーフ後端に空気抵抗低減装置（リアスポイラ）を取り付ける等の対策が講じられている。In order to control the state of the airflow flowing along the upper and side surfaces of the vehicle body, it is necessary to change the entire vehicle body shape. Because there are restrictions on vehicle body dimensions, it is difficult to make significant changes in shape, such as a reduction in the load capacity as the overall length increases. For example, measures such as mounting an air resistance reduction device (rear spoiler) at the rear end of the roof have been taken.

なお、車両周辺の空気の流れを制御する技術としては、車体のリアウインドウ近傍に発生する空気の流れの剥離現象を制御する自動車の空気抵抗軽減装置や、サンルーフ装着車の開口部を広くした場合に発生するウインドスロップを防止するためのサンルーフディフレクタ等が知られている。（例えば、特許文献１，２参照）
特開２００４−３４５５６２号公報 特開２００２−５２９３５号公報 In addition, technologies for controlling the air flow around the vehicle include an air resistance reducing device for an automobile that controls a separation phenomenon of the air flow generated near the rear window of the vehicle body and a case where the opening of a vehicle with a sunroof is widened. There is known a sunroof deflector for preventing wind slop from occurring in a vehicle. (For example, see Patent Documents 1 and 2)
JP 2004-345562 A JP-A-2002-52935

上述したリアスポイラ等の自動車の空気抵抗低減装置では、次のような問題があった。すなわち、トラック等の大型自動車に取り付けられるリアスポイラは大型のものが必要であり、全長が規制されているトラックにおいては荷室寸法が削られ積載量が減ってしまう問題点があった。The air resistance reducing device for an automobile such as the above-described rear spoiler has the following problems. That is, a large rear spoiler to be attached to a large vehicle such as a truck requires a large one, and there is a problem that a truck having a restricted overall length has a reduced luggage size and a reduced loading capacity.

そこで本発明は、荷室寸法に大きな影響を与えることなく気流を制御することで空力性能を改善する事ができる自動車の空気抵抗軽減装置を提供することを目的としている。SUMMARY OF THE INVENTION It is an object of the present invention to provide an air resistance reducing device for an automobile which can improve aerodynamic performance by controlling an air flow without significantly affecting the dimensions of a luggage compartment.

問題を解決するための手段Means to solve the problem

前記問題を解決し目的を達成するために、本発明の自動車の空気抵抗低減装置は次のように構成されている。In order to solve the above problems and achieve the object, an air resistance reducing device for a vehicle according to the present invention is configured as follows.

（１）箱型車両の後部（後面ドア）部分に全面又は一部に渡り設けられ、後面に３箇所以上の開口部とそれら開口部を繋ぐ空気室を持つ、板状または筒状の空気抵抗低減装置(1) A plate-shaped or cylindrical air resistance provided at the rear (rear door) of the box-shaped vehicle over the entire surface or a part thereof and having three or more openings and an air chamber connecting the openings on the rear surface. Reduction device

本発明は自動車の後部に発生する渦流に着目した。箱型形状後部の渦流について発生を抑制するのではなく、発生した渦流を小さくする事により空気抵抗を低減させる。
箱型形状後面の後部ドア表面には渦流により気圧の差が発生しており、風向きや空気の粘性により絶えず変化している。この気圧差を本空気抵抗低減装置により減少させることにより、渦流を小さくする。気圧の高い場所と気圧の低い場所を開口部と空気室で繋ぎ、気圧の差を減少させる。
開口部が空気室でつながっているため、それぞれの開口部の気圧が変化しても自動的に空気が出入りし気圧の差を減少させる。The present invention has focused on eddy currents generated in the rear of an automobile. Rather than suppressing the generation of the vortex at the rear of the box shape, the air resistance is reduced by reducing the generated vortex.
A pressure difference is generated on the rear door surface of the box-shaped rear surface by a vortex, and is constantly changed by wind direction and air viscosity. The eddy current is reduced by reducing this pressure difference by the present air resistance reduction device. The place with high pressure and the place with low pressure are connected by the opening and the air chamber to reduce the difference in pressure.
Since the openings are connected by the air chamber, air automatically flows in and out even if the air pressure of each opening changes, reducing the difference in air pressure.

発明の効果The invention's effect

（１）に記載した自動車の空気抵抗低減装置によれば荷台寸法を減少することなく気流を制御することで空力性能を改善することができる。According to the air resistance reducing device for an automobile described in (1), the aerodynamic performance can be improved by controlling the airflow without reducing the bed size.

（１）に記載した自動車の空気抵抗低減装置によれば小型であっても十分な空気抵抗低減効果が得られる。According to the air resistance reducing apparatus for a vehicle described in (1), a sufficient air resistance reducing effect can be obtained even if the apparatus is small.

図１は本発明の一実施形態に係る、自動車の空気抵抗低減装置を有するトラック等の箱型車両１０を示す斜視図、図２は同箱型車両１０の要部を示す後面図である。FIG. 1 is a perspective view showing a box-shaped vehicle 10 such as a truck having an air resistance reducing device for an automobile according to an embodiment of the present invention, and FIG. 2 is a rear view showing a main part of the box-shaped vehicle 10.

箱型車両１０はほぼ直方体状の運転席２１と直方体形状の荷室２２を備え、前後方向（進行方向）に長い形状をしている。荷室２２は側面部２３、前面部２４、ルーフ２５、後面部（後部ドア）２６、を備えている。又、箱型車両１０は前輪３０、後輪３１により支持されている。The box-shaped vehicle 10 includes a substantially rectangular parallelepiped driver's seat 21 and a rectangular parallelepiped luggage compartment 22, and is long in the front-rear direction (traveling direction). The luggage compartment 22 includes a side surface portion 23, a front surface portion 24, a roof 25, and a rear surface portion (rear door) 26. The box-shaped vehicle 10 is supported by front wheels 30 and rear wheels 31.

後面部（後部ドア）２６、は通常金属板により作られているが、このドア部分に本発明の空気抵抗低減装置を設置する。勿論、内蔵することも可能である。後面部全体が１つの空気抵抗低減装置でなくとも、両開きドアなので左右別にする事もできる。The rear surface (rear door) 26 is usually made of a metal plate, and the door is provided with the air resistance reducing device of the present invention. Of course, it is also possible to incorporate them. Even if the whole rear part is not a single air resistance reduction device, it can be divided into right and left since it is a double door.

後面部（後部ドア）２６には開口部３２を設ける。後部ドアは通常両開きであり左右別々に同じ構造を持っている。開口部３２の数や面積はは車体の大きさなどの条件により増減する。開口部３２は内部で空気室３３で繋がつており空気が自由に出入りできる。An opening 32 is provided in the rear surface (rear door) 26. The rear door is usually double-opened and has the same structure on the left and right separately. The number and area of the openings 32 increase or decrease depending on conditions such as the size of the vehicle body. The opening 32 is internally connected by an air chamber 33 so that air can freely enter and exit.

空気室３３は厚さ５センチ程度で良いと考える。対応速度や車両の大きさにより増減する。
広い面なので補強のための部材が必要であるが、空気の動きを極端に妨げなければ完全な空洞でなくとも良い。It is considered that the air chamber 33 may have a thickness of about 5 cm. It increases or decreases depending on the corresponding speed and the size of the vehicle.
Since it is a wide surface, a member for reinforcement is necessary, but it does not need to be a complete cavity as long as the movement of air is not extremely hindered.

本発明の第一の実施の形態に係る自動車の空気抵抗低減部材を有する箱型車両を示す斜視図。1 is a perspective view showing a box-shaped vehicle having an air resistance reducing member of an automobile according to a first embodiment of the present invention. 同箱型車両の後面部（後部ドア）を示す後面図Rear view showing the rear part (rear door) of the box type vehicle 本発明の作動原理を示す側面図Side view showing the operation principle of the present invention

１０．．．箱型車両、２１．．．運転席、２２．．．荷室、２３．．．側面部、２４．．．前面部、２５．．．ルーフ、２６．．．後面部（後部ドア）、３１．．．タイヤ、３２．．．開口部、３３．．．空気室、10. . . Box-shaped vehicle, 21. . . Driver's seat, 22. . . Luggage compartment, 23. . . Side part, 24. . . Front part, 25. . . Roof, 26. . . 31. rear face (rear door), 31. . . Tire, 32. . . Opening, 33. . . Air chamber,

本発明の第一の実施の形態に係る自動車の空気抵抗低減部材を有する箱型車両を示す斜視図。1 is a perspective view showing a box-shaped vehicle having an air resistance reducing member of an automobile according to a first embodiment of the present invention. 同箱型車両の後面部（後部ドア）を示す後面図Rear view showing the rear part (rear door) of the box type vehicle

Claims (2)

箱型車両の後面（後部ドア）に全面又は一部に設けられ、後面に３箇所以上の開口部と、開口部を繋ぐ空気室を持つ、空気抵抗低減装置An air resistance reduction device that is provided on the entire surface or a part of the rear surface (rear door) of a box-type vehicle and has three or more openings on the rear surface and an air chamber connecting the openings. 自動車等の移動体後部の全面又は一部に設けられ、後面に３箇所以上の開口部と、それぞれの開口部を繋ぐ空気室を持つ、空気抵抗低減装置An air resistance reduction device that is provided on the entire surface or a part of the rear part of a moving body such as an automobile and has three or more openings on the rear surface and air chambers that connect the respective openings.
JP2018196200A 2018-09-28 2018-09-28 Rear swirl flow control air resistance reduction device Pending JP2020055507A (en)

Priority Applications (1)

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JP2018196200A JP2020055507A (en) 2018-09-28 2018-09-28 Rear swirl flow control air resistance reduction device

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