JP5246305B2 - Vehicle deflector structure - Google Patents

Vehicle deflector structure Download PDF

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JP5246305B2
JP5246305B2 JP2011158653A JP2011158653A JP5246305B2 JP 5246305 B2 JP5246305 B2 JP 5246305B2 JP 2011158653 A JP2011158653 A JP 2011158653A JP 2011158653 A JP2011158653 A JP 2011158653A JP 5246305 B2 JP5246305 B2 JP 5246305B2
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vehicle
deflector plate
wheel
width direction
brake device
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JP2011201543A (en
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哲 岡本
洋樹 大平
博文 中藤
徹 植松
裕文 藤下
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Mazda Motor Corp
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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
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    • Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses

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Description

本発明は前輪を収容するホイールハウス内へ流入する走行風量を制限する車両のデフレクタ構造に関する。   The present invention relates to a deflector structure for a vehicle that limits the amount of traveling air flowing into a wheel house that houses a front wheel.

車両走行時に車体下面部下を通過する走行風はホイールハウス内に流入して車体側面から流出する。一般に、操舵輪である前輪を収容するホイールハウスは前輪の転舵代を見込んで奥行き空間が大きく形成されているため、前輪のホイールハウスに流入して車体側面から流出する空気量は多くなりやすい。   When the vehicle travels, the traveling wind that passes under the lower surface of the vehicle body flows into the wheel house and flows out from the side surface of the vehicle body. In general, the wheel house that houses the front wheel, which is a steered wheel, is formed with a large depth space in anticipation of the steering allowance of the front wheel, so the amount of air that flows into the front wheel house and out of the side of the vehicle body tends to increase. .

そこで、前輪の前方に板状のデフレクタ板を配設してホイールハウス内に流入する走行風量を低減することが提案されている（特許文献１および２）。   In view of this, it has been proposed to arrange a plate-shaped deflector plate in front of the front wheels to reduce the amount of traveling air flowing into the wheel house (Patent Documents 1 and 2).

一方、ホイールハウス内に流入する走行風量が低減すると前輪に設けられたブレーキ装置の冷却性が悪化する。このため、車両下面部を構成するアンダーカバーに、ブレーキ装置へ走行風を導く窪みを設けることも提案されている（特許文献１および２）。   On the other hand, when the amount of traveling air flowing into the wheel house is reduced, the cooling performance of the brake device provided on the front wheels is deteriorated. For this reason, providing the hollow which guides driving | running | working wind to a brake device in the under cover which comprises a vehicle lower surface part is also proposed (patent documents 1 and 2).

特許第３６０７９６５号公報Japanese Patent No. 3607965 特開２００２−３６２４２９号公報JP 2002-362429 A

本発明の目的は、ブレーキ装置の冷却性能を向上することができる車両のデフレクタ構造を提供することにある。   The objective of this invention is providing the deflector structure of the vehicle which can improve the cooling performance of a brake device.

本発明による車両のデフレクタ構造は、ブレーキ装置が設けられた操舵輪である前輪の前方において、車体下面部から下方へ突出し、前記前輪を収容するホイールハウス内へ車両前方から流入する走行風量を制限するデフレクタ板を備えた車両のデフレクタ構造において、前記ブレーキ装置はブレーキディスクを備え、該ブレーキ装置が前記前輪のホイール内に配設され、前記デフレクタ板は、その前端が車両底面から下方に垂下する縦壁を有すると共に、当該縦壁は底面視で車両後方から前方に向かって円弧状または楕円弧状に膨出した形状を有し、前記デフレクタ板の両端部は、車幅方向で前記ホイールハウスの車幅方向の幅内に収まるように配設されると共に、前記デフレクタ板の円弧状または楕円弧状に膨出した縦壁のうち、少なくともその前端部より車幅方向内側部分が、前記前輪の車幅方向中央部よりも車幅方向内側に配設されており、前記縦壁は、前記車両底面から、前記前輪の前後方向の中心を車幅方向に通る車軸より下方まで垂下して配設されたものである。 The vehicle deflector structure according to the present invention restricts the amount of traveling airflow that protrudes downward from the lower surface of the vehicle body and flows into the wheel house that houses the front wheel from the front of the front wheel, which is a steering wheel provided with a brake device. In the vehicle deflector structure including the deflector plate, the brake device includes a brake disk, the brake device is disposed in the wheel of the front wheel, and the front end of the deflector plate hangs downward from the vehicle bottom surface. and has a vertical wall, the vertical wall has a shape that bulges in a circular arc shape or elliptical shape toward the front from the rear of the vehicle in bottom view, both end portions of the deflector plate, the wheel house in the vehicle width direction Among the vertical walls that are arranged to fit within the width in the vehicle width direction and bulge in an arc shape or elliptic arc shape of the deflector plate, at least Further, an inner portion in the vehicle width direction from the front end portion is disposed on an inner side in the vehicle width direction than a center portion in the vehicle width direction of the front wheel, and the vertical wall extends from the bottom surface of the vehicle to the center in the front-rear direction of the front wheel. Is suspended downward from the axle passing in the vehicle width direction .

上記構成によれば、前記デフレクタ板の縦壁を乗り越えて前記ホイールハウス内へ流入する走行風が、車両後方へ流れる渦状の上昇流を生じる。
この渦状の上昇流が前記ブレーキ装置の冷却風となり、前記ブレーキ装置の冷却性を向上する。 According to the said structure, the driving | running | working wind which passes over the vertical wall of the said deflector board and flows in into the said wheel house produces the vortex-like upward flow which flows into a vehicle rear.
This whirl-like upward flow becomes cooling air for the brake device and improves the cooling performance of the brake device.

要するに、前記デフレクタ板が前方に膨出しつつ縦壁を有するので、走行風が前輪に直接当たることを防止することができ、また、縦壁のうち、少なくともその前端部より車幅方向内側部分が、前輪の車幅方向中央部よりも車幅方向内側に配設されているため、縦壁を乗り越えて渦状の気流となった走行風が積極的にブレーキ装置に導かれ、該ブレーキ装置の冷却性能を向上することができる。 In short, since the deflector plate bulges forward and has a vertical wall, it is possible to prevent the traveling wind from directly hitting the front wheels, and at least the inner part in the vehicle width direction from the front end of the vertical wall. Since the front wheel is disposed on the inner side in the vehicle width direction than the central portion in the vehicle width direction, the traveling wind that has become a vortex-like airflow over the vertical wall is actively guided to the brake device, and the brake device is cooled. The performance can be improved.

また、前記縦壁部は、前記車両底面から、前記前輪の前後方向の中心を車幅方向に通る車軸より下方まで垂下して配設されているものであるから、縦壁を乗り越えた走行風が渦状の上昇気流となった際に、ブレーキ装置に対してより一層走行風を導くことができ、該ブレーキ装置の冷却性能をさらに向上することができる。 Further , since the vertical wall portion is arranged to hang down from the vehicle bottom surface to the lower side of the axle passing through the center of the front wheel in the front-rear direction in the vehicle width direction, traveling wind over the vertical wall is provided. When it becomes a spiral updraft, traveling wind can be further guided to the brake device, and the cooling performance of the brake device can be further improved.

さらに、前記縦壁は、底面視で車両後方から前方に向かって膨出した形状を有するので、縦壁を乗り越えた渦状の走行風によって負圧が生じ、この負圧で、デフレクタ板の車幅方向内側の側面に沿って流れた走行風を引き寄せてブレーキ装置の方向に導くことができ、該ブレーキ装置の冷却性能をさらに向上させることができると共に、デフレクタ板の外側側面に沿って流れる走行風を車体側面に沿って導くことができ、車両全体のＣｄ値を低減することができる。つまり、ブレーキ装置の冷性性向上と、車両全体のＣｄ値低減との両立を図ることができる。 Further, the vertical wall, because a shape that bulges toward the front from the rear of the vehicle in bottom view, a negative pressure is generated by the running wind vortex survived vertical wall, with this negative pressure, the vehicle width of the deflector plate The traveling wind that flows along the side surface on the inner side of the direction can be drawn to the direction of the brake device, and the cooling performance of the brake device can be further improved, and the traveling wind that flows along the outer side surface of the deflector plate Can be guided along the side of the vehicle body, and the Cd value of the entire vehicle can be reduced. That is, it is possible to achieve both improvement of the cooling performance of the brake device and reduction of the Cd value of the entire vehicle.

加えて、車両底面視において、前記デフレクタ板の縦壁が円弧状または楕円弧状をなしているので、前記デフレクタ板により左右に偏向される走行風をより層状に維持することができ、車両全体のＣｄ値を向上できる。 In addition, in the vehicle bottom view, longitudinal wall of the deflector plate so that an arc shape or elliptical shape, it is possible to maintain the travel wind is deflected to the left and right by the deflector plate more layers, of the entire vehicle Ru can improve the Cd value.

以上述べた通り、本発明によれば、ブレーキ装置の冷却性能の向上を図る車両のデフレクタ構造を提供することができる。   As described above, according to the present invention, it is possible to provide a vehicle deflector structure that improves the cooling performance of the brake device.

本発明の一実施形態に係るデフレクタ構造を備えた車両の前方の側視図。The side view of the front of the vehicle provided with the deflector structure concerning one embodiment of the present invention. 車両の前方の底面図（一部断面図）。The bottom view (partial sectional view) of the front of the vehicle. 左側の前輪の前方に配設されたデフレクタ板の斜視図。The perspective view of the deflector board arrange | positioned ahead of the left front wheel. 要部の正面図（一部断面図）。The front view of a principal part (partial sectional view). 本発明の一実施形態に係るデフレクタ構造による走行風の流れの説明図（一部断面底面図）。Explanatory drawing (partial cross-sectional bottom view) of the flow of the driving | running | working wind by the deflector structure which concerns on one Embodiment of this invention. （ａ）乃至（ｃ）はデフレクタ板の他の例を示す底面図。(A) thru | or (c) is a bottom view which shows the other example of a deflector board.

走行風が前輪に直接当たることを防止すると共に、ブレーキ装置の冷却性能の向上を図るという目的を、ブレーキ装置が設けられた操舵輪である前輪の前方において、車体下面部から下方へ突出し、前記前輪を収容するホイールハウス内へ車両前方から流入する走行風量を制限するデフレクタ板を備えた車両のデフレクタ構造において、前記ブレーキ装置はブレーキディスクを備え、該ブレーキ装置が前記前輪のホイール内に配設され、前記デフレクタ板は、その前端が車両底面から下方に垂下する縦壁を有すると共に、当該縦壁は底面視で車両後方から前方に向かって円弧状または楕円弧状に膨出した形状を有し、前記デフレクタ板の両端部は、車幅方向で前記ホイールハウスの車幅方向の幅内に収まるように配設されると共に、前記デフレクタ板の円弧状または楕円弧状に膨出した縦壁のうち、少なくともその前端部より車幅方向内側部分が、前記前輪の車幅方向中央部よりも車幅方向内側に配設されており、前記縦壁は、前記車両底面から、前記前輪の前後方向の中心を車幅方向に通る車軸より下方まで垂下して配設されているという構成にて実現した。 In order to prevent the traveling wind from directly hitting the front wheels and to improve the cooling performance of the brake device, it projects downward from the lower surface of the vehicle body in front of the front wheel, which is the steering wheel provided with the brake device, In a vehicle deflector structure including a deflector plate that restricts the amount of travel air flowing from the front of a vehicle into a wheel house that houses a front wheel, the brake device includes a brake disk, and the brake device is disposed in the wheel of the front wheel. The deflector plate has a vertical wall whose front end hangs downward from the bottom surface of the vehicle, and the vertical wall has a shape that bulges in an arc shape or an elliptical arc shape from the rear of the vehicle toward the front in a bottom view. , both end portions of the deflector plate, while being arranged such in the vehicle width direction fit into the wheel house in the vehicle width direction within a width, the differential Of the vertical wall that bulges in the arc shape or elliptical arc shape of the kuta plate, at least the vehicle width direction inner side portion from the front end portion thereof is disposed on the vehicle width direction inner side than the vehicle width direction center portion of the front wheel, The vertical wall is realized by a configuration in which the vertical wall is arranged to hang downward from an axle passing through the center of the front wheel in the vehicle width direction from the vehicle bottom surface .

この発明の一実施態様を以下図面に基づいて詳述する。   An embodiment of the present invention will be described in detail with reference to the drawings.

図１はこの発明のデフレクタ構造を備えた車両Ａの前方の側視図、図２は車両Ａの前方の底面図（一部断面図）、図４は要部の正面図（一部断面図）である。
車両Ａは操舵輪である左右の前輪１と、前輪１を転舵可能に収納するホイールハウス２と、を備える。ホイールハウス２は前輪１の転舵代を見込んで奥行き空間が形成されており、その一部には図４（左の前輪１の近傍を示す。）に示すように、サスペンションタワー部２ａが形成されている。
また、図４に示すように、ホイールハウス２の車外側にはフロントフェンダパネル７が接合され、車内側にはフロントサイドフレーム８が接合されている。フロントサイドフレーム８にはボディ結合ブッシュ９を介してペリメータフレーム６が接合されている。 1 is a front side view of a vehicle A having a deflector structure of the present invention, FIG. 2 is a bottom view (partial sectional view) of the front of the vehicle A, and FIG. ).
The vehicle A includes left and right front wheels 1 that are steered wheels, and a wheel house 2 that houses the front wheels 1 so as to be steerable. The wheel house 2 is formed with a depth space in anticipation of the turning allowance of the front wheel 1, and a suspension tower portion 2 a is formed in a part of the wheel house 2 as shown in FIG. 4 (showing the vicinity of the left front wheel 1). Has been.
As shown in FIG. 4, a front fender panel 7 is joined to the vehicle exterior side of the wheel house 2, and a front side frame 8 is joined to the vehicle interior side. A perimeter frame 6 is joined to the front side frame 8 via a body coupling bush 9.

前輪１はホイール１ａとホイール１ａに装着されたタイヤ１ｂとを備え、ナックルアーム４を介して操舵されるように構成されている。前輪１にはブレーキ装置３が設けられている。ブレーキ装置３はブレーキディスク３ａとキャリパー３ｂとから構成されており、ブレーキディスク３ａはホイール１ａに固定されている。キャリパー３ｂはステアリングナックル（図示せず）に支持され、ブレーキディスク３ａに鞍状にまたがって配設されている。前輪１はロアアーム５を含むフロントサスペンション（例えば、ダブルウィッシュボーン形式、マクファーソンストラット形式）により左右独立して懸架されており、ロアアーム５はペリメータフレーム６に支持されている。なお、図２に示すように、車両Ａの前方の車体下面部は、アンダカバー１０ａ乃至１０ｃにより構成されている。   The front wheel 1 includes a wheel 1 a and a tire 1 b attached to the wheel 1 a and is configured to be steered via a knuckle arm 4. A brake device 3 is provided on the front wheel 1. The brake device 3 includes a brake disc 3a and a caliper 3b, and the brake disc 3a is fixed to the wheel 1a. The caliper 3b is supported by a steering knuckle (not shown), and is disposed across the brake disc 3a in a hook shape. The front wheel 1 is suspended independently from the left and right by a front suspension including a lower arm 5 (for example, double wishbone type, McPherson strut type), and the lower arm 5 is supported by a perimeter frame 6. As shown in FIG. 2, the vehicle body lower surface portion in front of the vehicle A is configured by undercovers 10a to 10c.

次に、前輪１の前方にはアンダカバー１０ｂに取り付けられたデフレクタ板１００が配設されている。図３は左の前輪１の前方に配設されたデフレクタ板１００の斜視図である。なお、右の前輪１の前方に配設されたデフレクタ板１００も左右が対称となるが同様の構成である。   Next, a deflector plate 100 attached to the under cover 10b is disposed in front of the front wheel 1. FIG. 3 is a perspective view of the deflector plate 100 disposed in front of the left front wheel 1. The deflector plate 100 disposed in front of the right front wheel 1 has the same configuration although the left and right are symmetrical.

デフレクタ板１００は、ホイールハウス２内へ車両前方から流入する走行風量を制限する板状の部材であり、例えば、樹脂材料から形成される。デフレクタ板１００の上縁にはアンダカバー１０ｂへの取付部１０１が一体に形成されている。取付部１０１には取付穴１０１ａが形成されている。デフレクタ板１００は取付穴１０１ａにより、リベットあるいはネジによりアンダカバー１０ｂに固定される。   The deflector plate 100 is a plate-like member that restricts the amount of travel air flowing into the wheel house 2 from the front of the vehicle, and is made of, for example, a resin material. At the upper edge of the deflector plate 100, a mounting portion 101 to the under cover 10b is integrally formed. A mounting hole 101 a is formed in the mounting portion 101. The deflector plate 100 is fixed to the under cover 10b by rivets or screws through the mounting holes 101a.

デフレクタ板１００は車幅方向に湾曲しながら延びており、その車幅方向の両端部（内側端部１００ａ、外側端部１００ｂ）の双方から車両前方へ膨出した形状を有している。デフレクタ板１００の上下方向の幅は、両端部１００ａおよび１００ｂよりも中央部の方が狭くなっており、図１に示すように、デフレクタ板１００の下縁は、車両後方側となる両端部１００ａおよび１００ｂよりも車両前方側となる中央側の方が地面から上方に位置している（図１でｈ１＜ｈ２）。これは縁石等とデフレクタ板１００とが干渉することを防止するものである。   The deflector plate 100 extends while curving in the vehicle width direction, and has a shape bulging forward from both ends (inner end portion 100a and outer end portion 100b) in the vehicle width direction. The width of the deflector plate 100 in the vertical direction is narrower at the center than at both ends 100a and 100b. As shown in FIG. 1, the lower edge of the deflector plate 100 is at both ends 100a on the vehicle rear side. Further, the center side, which is the front side of the vehicle, is located above the ground above 100b (h1 <h2 in FIG. 1). This is to prevent the curbstone and the deflector plate 100 from interfering with each other.

上記の通り、この実施例ではデフレクタ板１００が両端部１００ａおよび１００ｂの双方から車両前方へ膨出した形状を有しているが、本実施形態では、特に、車両底面視で楕円弧状をなしている。図２において、線Ｌ１よりも車両前方側の部分は完全な楕円弧であるが、内側端部１００ａ近傍は車両前後方向と平行に延びている。なお、外側端部１００ｂ近傍を車両前後方向と平行に延びるようにしてもよいし、両端部１００ａおよび１００ｂ近傍を車両前後方向と平行に延びるようにしてもよい。   As described above, in this embodiment, the deflector plate 100 has a shape that bulges from both ends 100a and 100b toward the front of the vehicle. In the present embodiment, however, the deflector plate 100 has an elliptical arc shape particularly when viewed from the bottom of the vehicle. Yes. In FIG. 2, the portion on the vehicle front side with respect to the line L1 is a complete elliptical arc, but the vicinity of the inner end portion 100a extends in parallel with the vehicle longitudinal direction. It should be noted that the vicinity of the outer end portion 100b may extend in parallel with the vehicle front-rear direction, or the vicinity of both end portions 100a and 100b may extend in parallel with the vehicle front-rear direction.

また、この実施例の場合、図２に示すように、内側端部１００ａはホイールハウス２の前縁近傍に略一致するように配設されている。なお、外側端部１００ｂをホイールハウス２の前縁部に略一致するように配設してもよいし、両端部１００ａおよび１００ｂをホイールハウス２の前縁部に略一致するように配設してもよい。   In the case of this embodiment, as shown in FIG. 2, the inner end portion 100 a is disposed so as to substantially coincide with the vicinity of the front edge of the wheel house 2. The outer end portion 100b may be disposed so as to substantially match the front edge portion of the wheel house 2, or both end portions 100a and 100b may be disposed so as to substantially match the front edge portion of the wheel house 2. May be.

また、図２に示すように、デフレクタ板１００の膨出方向は、車両前後方向よりも車内側を向いている。この実施例の場合、楕円弧の中心方向（長軸方向）Ｌ２が車両前後方向と角度θをなしている。なお、デフレクタ板１００の膨出方向を車両前後方向に合わせる構成も採用可能である。   Further, as shown in FIG. 2, the bulging direction of the deflector plate 100 is directed to the vehicle inner side than the vehicle front-rear direction. In the case of this embodiment, the center direction (long axis direction) L2 of the elliptical arc forms an angle θ with the vehicle longitudinal direction. A configuration in which the bulging direction of the deflector plate 100 is aligned with the vehicle front-rear direction can also be employed.

次に、図４に示すように、車両正面視で、デフレクタ板１００は前輪１のタイヤ１ｂと一部が重なるように配設されている。本実施形態の場合、外側端部１００ｂはタイヤ１ｂの幅方向の中心よりも外側に位置し、内側端部１００ａはタイヤ１ｂの内縁よりも車内側でホイールハウス２の内縁よりも車外側に位置しており、デフレクタ板１００は車幅方向にタイヤ１ｂの内縁を跨るように配設されている。このため、車両前方からアンダカバー１０ｂ下を通過する走行風がデフレクタ板１００により偏向され、デフレクタ板１００が存在しない場合と比べるとホイールハウス２内へ流入することが制限される。   Next, as shown in FIG. 4, the deflector plate 100 is disposed so as to partially overlap the tire 1 b of the front wheel 1 when viewed from the front of the vehicle. In the case of the present embodiment, the outer end portion 100b is located outside the center in the width direction of the tire 1b, and the inner end portion 100a is located on the vehicle inner side than the inner edge of the tire 1b and outside the inner edge of the wheel house 2. The deflector plate 100 is disposed so as to straddle the inner edge of the tire 1b in the vehicle width direction. For this reason, traveling wind passing under the under cover 10b from the front of the vehicle is deflected by the deflector plate 100, and is restricted from flowing into the wheel house 2 as compared with the case where the deflector plate 100 does not exist.

次に、デフレクタ板１００の作用について説明する。デフレクタ板１００は上記の通り、基本的にはホイールハウス２内へ車両前方から走行風が流入することを制限するものであるが、この実施例ではデフレクタ板１００が両端部１００ａおよび１００ｂの双方から車両前方へ膨出した形状を有しているため、走行風の一部がブレーキ装置３へ流れ、その冷却風とすることができる。図５は走行風の流れの説明図（一部断面底面図）である。   Next, the operation of the deflector plate 100 will be described. As described above, the deflector plate 100 basically restricts the flow of traveling wind into the wheel house 2 from the front of the vehicle. In this embodiment, the deflector plate 100 is provided from both ends 100a and 100b. Since it has a shape bulging forward of the vehicle, part of the traveling wind flows to the brake device 3 and can be used as cooling air. FIG. 5 is an explanatory diagram (partially sectional bottom view) of the flow of traveling wind.

デフレクタ板１００に衝突する走行風は、デフレクタ板１００を乗り越える気流ｄ１ａ、ｄ１ｂと、乗り越えずにデフレクタ板１００の側面を流れる気流ｄ２ａ、ｄ２ｂとに大別される。   The traveling wind that collides with the deflector plate 100 is roughly divided into airflows d1a and d1b that pass over the deflector plate 100 and airflows d2a and d2b that flow on the side surfaces of the deflector plate 100 without getting over the deflector plate 100.

まず、気流ｄ２ａはデフレクタ板１００の内側端部１００ａに続く側面に沿ってホイールハウス２内へ流れ、気流ｄ２ｂはデフレクタ板１００の外側端部１００ｂに続く側面に沿って車両側方へ流れる。本実施形態の場合、デフレクタ板１００が車両底面視で楕円弧状をなしており、緩やかにカーブしているため、デフレクタ板１００により左右に偏向される走行風である気流ｄ２ａおよびｄ２ｂはデフレクタ板１００の側面に沿って層状の流れを維持でき、乱れが少なくなる。このため、特に車両側方に流れる気流ｄ２ｂについて、車両全体のＣｄ値を向上できる。一方、気流ｄ２ａはホイールハウス２内へ流入して徐々に拡散する。このため、その一部が上昇して図５に示すように車両側方へ流れ、ブレーキ装置３の冷却風として機能することになる。本実施形態では、特に、デフレクタ板１００の内側端部１００ａ近傍が車両前後方向と平行に延びているため、気流ｄ２ａをより車両後方側へ、つまり、ブレーキ装置３へ導くことができる。   First, the air flow d2a flows into the wheel house 2 along the side surface that continues to the inner end portion 100a of the deflector plate 100, and the air flow d2b flows to the vehicle side along the side surface that continues to the outer end portion 100b of the deflector plate 100. In the case of the present embodiment, the deflector plate 100 has an elliptical arc shape when viewed from the bottom of the vehicle, and is gently curved. Therefore, the airflows d2a and d2b that are traveling winds deflected left and right by the deflector plate 100 are deflected. A laminar flow can be maintained along the side surface of the film, and turbulence is reduced. For this reason, the Cd value of the entire vehicle can be improved particularly with respect to the air flow d2b flowing to the side of the vehicle. On the other hand, the air flow d2a flows into the wheel house 2 and gradually diffuses. Therefore, a part of it rises and flows to the side of the vehicle as shown in FIG. 5, and functions as cooling air for the brake device 3. In the present embodiment, in particular, since the vicinity of the inner end portion 100a of the deflector plate 100 extends in parallel with the vehicle front-rear direction, the air flow d2a can be guided further to the vehicle rear side, that is, to the brake device 3.

一方、デフレクタ板１００を乗り越える気流ｄ１ａ、ｄ１ｂは、デフレクタ板１００の左右の湾曲方向が走行風の進行方向（車両前後方向）から傾いているため、図５に示すように渦状の気流となり、まとまりながら流れる。また、デフレクタ板１００を下方から上方へ乗り越えることになるので、渦状の上昇流となる。このうち、デフレクタ板１００の外側端部１００ｂに続く側面を乗り越えた気流ｄ１ｂは、外側端部１００ｂに続く側面が車両外方に指向していると共にタイヤ１ｂの存在により拡散しながら車両側方に流れ、気流ｄ２ｂと合流する。気流ｄ１ｂにより車両側方を流れる気流が若干乱れるが、気流ｄ１ｂはタイヤ１ｂに衝突して拡散し、気流が弱まることと気流ｄ２ｂとの合流により、車両側方を流れる気流の乱れは左程大きくならない。   On the other hand, the airflows d1a and d1b over the deflector plate 100 are swirled as shown in FIG. 5 because the left and right curve directions of the deflector plate 100 are inclined from the traveling direction of the traveling wind (the vehicle longitudinal direction). While flowing. Moreover, since it will get over the deflector board 100 from the downward | lower direction, it will become a spiral upflow. Of these, the airflow d1b that has crossed the side surface that follows the outer end portion 100b of the deflector plate 100 is directed to the vehicle side while the side surface continuing to the outer end portion 100b is directed outwardly of the vehicle and diffuses due to the presence of the tire 1b. Flows and merges with the air flow d2b. The airflow d1b slightly disturbs the airflow flowing on the side of the vehicle, but the airflow d1b collides with the tire 1b and diffuses, and due to the weakening of the airflow and the confluence with the airflow d2b, the turbulence of the airflow flowing on the side of the vehicle increases to the left. Don't be.

一方、デフレクタ板１００の内側端部１００ａに続く側面を乗り越えた気流ｄ１ａは、外側端部１００ａに続く側面がタイヤ１ｂの内縁よりも車両内方に指向していることにより、ホイールハウス２内を上昇しながら流れ、徐々に拡散する。しかして、気流ｄ１ａはブレーキ装置３の冷却風として機能することになる。この実施例では、特に、デフレクタ板１００の内側端部１００ａ近傍が車両前後方向と平行に延びているため、気流ｄ１ａをより車両後方側へ、つまり、ブレーキ装置３へ導くことができる。また、この実施例では、デフレクタ板１００の内側端部１００ａがホイールハウス２の前縁部に略一致しているため、デフレクタ板１００がホイールハウス２により近い位置に配設され、しかも、内側端部１００ａがブレーキ装置３へより近づくことから、気流ｄ１ａや気流ｄ２ａが完全に拡散してしまう前に、ブレーキ装置３へ届きやすくなり、ブレーキ装置３の冷却性を向上できる。   On the other hand, the airflow d1a that has overcome the side surface that follows the inner end portion 100a of the deflector plate 100 is directed inside the wheel house 2 because the side surface that continues to the outer end portion 100a is directed toward the vehicle inner side than the inner edge of the tire 1b. It flows while ascending and diffuses gradually. Thus, the air flow d1a functions as cooling air for the brake device 3. In this embodiment, in particular, since the vicinity of the inner end portion 100a of the deflector plate 100 extends in parallel with the vehicle front-rear direction, the air flow d1a can be guided further to the vehicle rear side, that is, to the brake device 3. In this embodiment, since the inner end portion 100a of the deflector plate 100 substantially coincides with the front edge portion of the wheel house 2, the deflector plate 100 is disposed at a position closer to the wheel house 2, and the inner end portion Since the portion 100a is closer to the brake device 3, the air flow d1a and the air flow d2a can easily reach the brake device 3 before the air flow d1a is completely diffused, and the cooling performance of the brake device 3 can be improved.

さらに、この実施例では、デフレクタ板１００の膨出方向が車両前後方向よりも車内側を向いているため、内側端部１００ａに続く側面は、走行風（車両前後方向）となす角度が相対的に浅くなり、外側端部１００ｂに続く側面は、相対的に深くなる。つまり、外側端部１００ｂに続く側面に走行風が衝突する場合よりも、内側端部１００ａに続く側面に走行風が衝突する場合の方が、拡散の程度が小さく、かつ、車両後方へ流れやすくなる。このため、気流ｄ１ａや気流ｄ２ａが車両後方へ、つまり、ブレーキ装置３へ指向しやすくなり、ブレーキ３の冷却性を向上できる。   Further, in this embodiment, since the bulging direction of the deflector plate 100 is directed to the vehicle inner side than the vehicle front-rear direction, the angle between the side surface following the inner end portion 100a and the traveling wind (vehicle front-rear direction) is relative. The side surface following the outer end portion 100b becomes relatively deep. That is, when the traveling wind collides with the side surface following the inner end portion 100a, the degree of diffusion is smaller and it is easier to flow to the rear of the vehicle than when the traveling wind collides with the side surface following the outer end portion 100b. Become. For this reason, the airflow d1a and the airflow d2a are easily directed toward the rear of the vehicle, that is, toward the brake device 3, and the cooling performance of the brake 3 can be improved.

このように、この実施例では、デフレクタ板１００の存在によりホイールハウス２内へ流入する走行風量が制限され、ホイールハウス２から車外へ流出する走行風量を低減し、車両Ａ全体のＣｄ値を向上させる。一方、デフレクタ板１００を、その車幅方向の両端部から車両前方へ膨出した形状とすることで、デフレクタ板１００を乗り越えてホイールハウス２内へ流入する走行風が、車両後方へ流れる渦状の上昇流を生じさせ、この渦状の上昇流がブレーキ装置３の冷却風となり、ブレーキ装置３の冷却性を向上する。従って、ブレーキ装置３の冷却性と、車両Ａ全体のＣｄ値とを両立し得る車両のデフレクタ構造を提供することができる。デフレクタ板１００の構成のみでこれらの効果を得られる。   Thus, in this embodiment, the travel air volume flowing into the wheel house 2 is limited due to the presence of the deflector plate 100, the travel air volume flowing out of the vehicle from the wheel house 2 is reduced, and the Cd value of the entire vehicle A is improved. Let On the other hand, the deflector plate 100 has a shape that bulges forward from both ends of the vehicle width direction to the front of the vehicle, so that the traveling wind that flows over the deflector plate 100 and flows into the wheel house 2 flows in the rear of the vehicle. An upward flow is generated, and this spiral upward flow becomes cooling air for the brake device 3, and the cooling performance of the brake device 3 is improved. Therefore, it is possible to provide a vehicle deflector structure that can achieve both the cooling performance of the brake device 3 and the Cd value of the entire vehicle A. These effects can be obtained only by the configuration of the deflector plate 100.

＜他の実施例＞
上記実施例では、デフレクタ板１００の底面視形状を楕円弧状としたが、デフレクタ板の車幅方向の両端部から車両前方へ膨出した形状はこれに限られず、種々の形状が採用できる。例えば、図６（ａ）のデフレクタ板２００のように円弧状（半円弧状）とすることもできる。また、参考例として、図６（ｂ）のデフレクタ板２０１のように三角状（底辺がないもの）とすることもできる。更に、参考例として、図６（ｃ）のデフレクタ板２０２のように台形状（底辺がないもの）とすることもできる。図６の（ａ）で示した実施例においても、デフレクタ板１００について説明した構成は適宜採用することができ、デフレクタ板１００と同様の効果が得られる。 <Other embodiments>
In the above embodiment, the shape of the deflector plate 100 viewed from the bottom is an elliptical arc shape, but the shape of the deflector plate that bulges forward from both ends in the vehicle width direction is not limited to this, and various shapes can be adopted. For example, it may be arcuate (semi-arc) like the deflector plate 200 in FIG. Moreover, as a reference example, it can also be made into a triangular shape (thing without a base) like the deflector board 201 of FIG.6 (b). Further, as a reference example, a trapezoidal shape (having no bottom) such as the deflector plate 202 of FIG. Also in the embodiment shown in FIG. 6A, the configuration described for the deflector plate 100 can be adopted as appropriate, and the same effect as the deflector plate 100 can be obtained.

１ 前輪
１ａ…ホイール
２ ホイールハウス
３ ブレーキ装置
３ａ…ブレーキディスク
１００、２００ デフレクタ板 1 wheel 1a ... wheel 2 wheel house 3 brake device 3a ... brake disc 100, 20 0 deflector plate

Claims (1)

ブレーキ装置が設けられた操舵輪である前輪の前方において、車体下面部から下方へ突出し、前記前輪を収容するホイールハウス内へ車両前方から流入する走行風量を制限するデフレクタ板を備えた車両のデフレクタ構造において、
前記ブレーキ装置はブレーキディスクを備え、該ブレーキ装置が前記前輪のホイール内に配設され、
前記デフレクタ板は、その前端が車両底面から下方に垂下する縦壁を有すると共に、
当該縦壁は底面視で車両後方から前方に向かって円弧状または楕円弧状に膨出した形状を有し、
前記デフレクタ板の両端部は、車幅方向で前記ホイールハウスの車幅方向の幅内に収まるように配設されると共に、
前記デフレクタ板の円弧状または楕円弧状に膨出した縦壁のうち、少なくともその前端部より車幅方向内側部分が、前記前輪の車幅方向中央部よりも車幅方向内側に配設されており、
前記縦壁は、前記車両底面から、前記前輪の前後方向の中心を車幅方向に通る車軸より下方まで垂下して配設されていることを特徴とする
車両のデフレクタ構造。 A vehicle deflector provided with a deflector plate that protrudes downward from the lower surface of the vehicle body in front of a front wheel, which is a steering wheel provided with a brake device, and restricts the amount of traveling air flowing from the front of the vehicle into a wheel house that houses the front wheel. In structure
The brake device includes a brake disc, and the brake device is disposed in a wheel of the front wheel.
The deflector plate has a vertical wall whose front end hangs downward from the vehicle bottom surface,
The vertical wall has a shape that bulges in an arc shape or an elliptical arc shape from the rear to the front in a bottom view,
Both ends of the deflector plate are disposed so as to be within the width of the wheel house in the vehicle width direction in the vehicle width direction,
Of the vertical wall of the deflector plate that bulges in an arc shape or elliptical arc shape, at least the inner portion in the vehicle width direction from the front end portion is disposed on the inner side in the vehicle width direction than the central portion in the vehicle width direction of the front wheel. ,
The vertical wall, said a vehicle bottom surface, the deflector structure of the vehicle, characterized in that it is arranged suspended in the longitudinal direction of the center of the front wheel to lower the axle through the vehicle width direction.
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