JP4886796B2 - Rear structure of the vehicle - Google Patents

Rear structure of the vehicle Download PDF

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JP4886796B2
JP4886796B2 JP2009002592A JP2009002592A JP4886796B2 JP 4886796 B2 JP4886796 B2 JP 4886796B2 JP 2009002592 A JP2009002592 A JP 2009002592A JP 2009002592 A JP2009002592 A JP 2009002592A JP 4886796 B2 JP4886796 B2 JP 4886796B2
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side wall
vehicle
air
bumper
joint portion
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JP2010158985A (en
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恭大 金子
誠 玉村
奏桜 田中
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Honda Access Corp
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Honda Access Corp
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Description

本発明は、車両の後部構造に関し、特に車両の後方に配置されるバンパー等に適用した場合に好適なものである。 The present invention relates to a rear structure of a vehicle, and is particularly suitable when applied to a bumper or the like disposed behind the vehicle.

従来、この種のバンパーとしては、車両前方より空気流を受ける車体のサイドコーナ部に少なくとも１個の碗型突起面を形成したものが開示されている（例えば、特許文献１）。このバンパーによれば、車両前方からの空気流が前記碗型突起面を回り込み、前記サイドコーナ部における車両の正面投影面が受ける圧力の前側への分力を大きくさせ、前記碗型突起面を回り込んだ空気流が車体側面へ向かう空気流を整えて、車体側面の空気流の剥離を抑制し、デザインを優先した形状であっても空気抵抗を減少させることができる。 Conventionally, as this type of bumper, a bumper in which at least one saddle-shaped projection surface is formed on a side corner portion of a vehicle body that receives an airflow from the front of the vehicle is disclosed (for example, Patent Document 1). According to this bumper, an air flow from the front of the vehicle wraps around the saddle-shaped projection surface, and increases the component force to the front side of the pressure received by the front projection surface of the vehicle at the side corner portion. The airflow that has flowed around adjusts the airflow toward the side surface of the vehicle body, suppresses separation of the airflow on the side surface of the vehicle body, and can reduce air resistance even in a shape that prioritizes design.

特許第３６２４６０９号公報Japanese Patent No. 3624609

しかしながら、上記特許文献１では、車体後部に適用した場合、車体側面の空気流の剥離が抑制されるので、当該空気流が車両の後部に回り込んで渦流を引き起こし、空気抵抗が大きくなるという懸念があった。 However, in the above-mentioned Patent Document 1, when applied to the rear part of the vehicle body, separation of the air flow on the side surface of the vehicle body is suppressed. was there.

そこで本発明は上記した問題点に鑑み、より空気抵抗を低減することができる車両の後部構造を提供することを目的とする。 In view of the above problems, an object of the present invention is to provide a rear structure of a vehicle that can further reduce air resistance.

本発明の請求項１に係る発明は、車両の後輪の後方を覆う後部構造において、前記後輪の表面に略平行に形成された第１側壁と、前記第１側壁の後方であって表面が前記第１側壁より内方であって前記第１側壁と略平行に形成された第２側壁と、前記第２側壁の後方に連続して形成され前記車両の内方へ延長された第３側壁とを備え、前記第１側壁は、後方端において前記第２側壁と接合部を介して一体的に形成され、前記接合部は略鉛直方向へ延び、前記接合部は、前記第１側壁及び第２側壁に対し略直角に形成された段部であり、前記接合部により前記第１側壁と第２側壁とは階段状に構成されていることを特徴とする。 According to a first aspect of the present invention, in the rear structure that covers the rear of the rear wheel of the vehicle, the first side wall formed substantially parallel to the surface of the rear wheel, and the rear surface of the first side wall Is a second side wall formed inward of the first side wall and substantially parallel to the first side wall, and a third side wall continuously formed behind the second side wall and extending inward of the vehicle. The first side wall is formed integrally with the second side wall at the rear end via the joint portion, the joint portion extends in a substantially vertical direction, and the joint portion includes the first side wall and the side wall. The step portion is formed at a substantially right angle with respect to the second side wall, and the first side wall and the second side wall are formed stepwise by the joint portion .

本発明の請求項２に係る発明は前記第１側壁と第２側壁との接合部である前記段部は、長さが約10ｍｍ程度に形成されていることを特徴とする。 The invention according to claim 2 of the present invention is characterized in that the step portion, which is a joint portion between the first side wall and the second side wall, is formed to have a length of about 10 mm .

本発明の請求項１に係る発明によれば、走行時における前方からの空気の流れを第１側壁と第２側壁とにおいて分離することにより、車両の周囲の空気の流れをスムーズにさせることで空気抵抗を減少させ走行性能及び燃費性能を改善することができる。 According to the first aspect of the present invention, by separating the air flow from the front during traveling at the first side wall and the second side wall, the air flow around the vehicle is made smoother. It is possible to reduce the air resistance and improve the driving performance and fuel consumption performance.

本発明の請求項１及び２に係る発明によれば、段部において、より確実に渦流を発生することができるので、より確実に第２側壁の後方へ空気の壁を形成することができる。 According to the first and second aspects of the present invention, since the vortex can be generated more reliably in the stepped portion, the air wall can be more reliably formed behind the second side wall.

本発明に係る車両後部構造の構成を示す車両の側面図である。1 is a side view of a vehicle showing a configuration of a vehicle rear structure according to the present invention. 本発明に係る車両後部構造の側面図である。It is a side view of the vehicle rear part structure which concerns on this invention. 本発明に係る車両後部構造の平面図である。It is a top view of the vehicle rear part structure which concerns on this invention. 本発明に係る車両後部構造の背面図である。It is a rear view of the vehicle rear part structure which concerns on this invention. 本発明に係る車両後部構造の使用状態を示す平面図である。It is a top view which shows the use condition of the vehicle rear part structure which concerns on this invention.

（全体構成）
以下、図面を参照して本発明の実施形態について詳細に説明する。尚、以下の説明において、車両の進行方向を「前」として前方向Ｆｒと示し、「後」、「左」、「右」はそれぞれ、後方向Ｒｒ、左方向Ｌ、右方向Ｒとして示す。 (overall structure)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the traveling direction of the vehicle is indicated as “front” as the front direction Fr, and “rear”, “left”, and “right” are indicated as the rear direction Rr, the left direction L, and the right direction R, respectively.

図1に示す車両１の後部構造では、後部としてのリアバンパー（以下、「バンパー」という。）２が、車両１の後方向の端部に設けられており、主に鉛直方向に略平行な面で構成され、後輪の後方及び車両１の後端部分を覆うように形成されている。また、バンパー２の上部には、テイルランプ３が左右一対設けられている。 In the rear structure of the vehicle 1 shown in FIG. 1, a rear bumper (hereinafter referred to as “bumper”) 2 as a rear portion is provided at the rear end of the vehicle 1 and is substantially parallel to the vertical direction. It is comprised by the surface, and it is formed so that the rear-wheel and the rear-end part of the vehicle 1 may be covered. A pair of tail lamps 3 are provided on the upper side of the bumper 2.

因みに車両１は、前輪４及び後輪５を左右一対ずつ備える四輪の自動車であり、前方の端部にフロントバンパー６が設けられている。本実施形態に係る車両１は、ユーザが乗車する車室７の天井部分が開閉自在の幌８で覆われている、オープンカータイプであり、前から順にエンジンルームを覆うボンネット９、フロントガラス10、幌８、荷物を収容するトランクルームを覆うトランクリッド11がそれぞれ配置されている。 Incidentally, the vehicle 1 is a four-wheeled vehicle that includes a pair of left and right front wheels 4 and rear wheels 5, and a front bumper 6 is provided at a front end portion. The vehicle 1 according to this embodiment is an open car type in which a ceiling portion of a passenger compartment 7 in which a user gets in is covered with an openable / closable hood 8, and a bonnet 9 and a windshield 10 that cover an engine room in order from the front. A hood 8 and a trunk lid 11 covering a trunk room for storing luggage are arranged.

また、車両１の側面1aは、前から順にフロントバンパー６、フロントフェンダー12、前輪４、ドアパネル13、後輪５、リアフェンダー14、及びバンパー２によって構成され、側面1aを流れる空気が前方から後方にかけてスムーズに流れるように形成されている。本実施形態において、車両１は、ドアパネル13の下方にサイドステップ15が設けられており、空気抵抗をより低減し得るように構成されている。 Further, the side surface 1a of the vehicle 1 is composed of a front bumper 6, a front fender 12, a front wheel 4, a door panel 13, a rear wheel 5, a rear fender 14, and a bumper 2 in order from the front, and the air flowing on the side surface 1a extends from the front to the rear. It is formed to flow smoothly. In the present embodiment, the vehicle 1 is provided with a side step 15 below the door panel 13 so that the air resistance can be further reduced.

尚、本発明に係る後部構造は、車両１のコーナー部に配置される部分に特徴があるが、左右対称であるので、簡単のため右側、すなわち車両１の右後のコーナー部についてのみ説明することとする。 The rear structure according to the present invention is characterized by a portion arranged at the corner portion of the vehicle 1 but is symmetrical, and therefore only the right side corner portion of the vehicle 1 is described for simplicity. I will do it.

図2に示すように、バンパー２は、車両１の側面1aに配置された第１側壁20と、前記第１側壁20の後方へ配置された第２側壁21と、前記第２側壁21から車両１の内方へ延長された第３側壁22とを備える。これにより、バンパー２は、第１側壁20と第２側壁21とで側面部2aが形成されており、第３側壁22で中央部2bが形成されている。 As shown in FIG. 2, the bumper 2 includes a first side wall 20 disposed on the side surface 1 a of the vehicle 1, a second side wall 21 disposed behind the first side wall 20, and the second side wall 21. 1 and a third side wall 22 extending inwardly. Thus, in the bumper 2, a side surface portion 2 a is formed by the first side wall 20 and the second side wall 21, and a central portion 2 b is formed by the third side wall 22.

第１側壁20は、後輪５のタイヤハウス16の後側部分となる前縁23を有し、表面が後輪５の表面と略平行に形成されている。この第１側壁20は、後方端において、第２側壁21と、接合部24を介して一体的に形成されている。接合部24は略鉛直方向へ延びる。 The first side wall 20 has a front edge 23 that becomes the rear side portion of the tire house 16 of the rear wheel 5, and the surface is formed substantially parallel to the surface of the rear wheel 5. The first side wall 20 is integrally formed with the second side wall 21 via the joint 24 at the rear end. The joint 24 extends in a substantially vertical direction.

第２側壁21は、車両１の側面1aを流れてきた空気を渦流に変え、車両１の側面1aの後方において空気の壁を形成し得るように構成されている。本実施形態では、第２側壁21は、図3に示すように、第１側壁20と略平行な面で構成されている。また、第１側壁20と第２側壁21との接合部24は、段部からなる。接合部24は、第１側壁20及び第２側壁21に対し略直角に形成されており、これにより、第１側壁20と第２側壁21とは、階段状に構成されている。車両１の側面1aを前方から流れてきた空気は、第１側壁20を通過後、接合部24を経て第２側壁21に接しながら後方へ流れ得る。 The second side wall 21 is configured to convert air flowing on the side surface 1a of the vehicle 1 into a vortex and form an air wall behind the side surface 1a of the vehicle 1. In the present embodiment, the second side wall 21 is constituted by a surface substantially parallel to the first side wall 20 as shown in FIG. Further, the joint 24 between the first side wall 20 and the second side wall 21 is a stepped portion. The joint portion 24 is formed at a substantially right angle with respect to the first side wall 20 and the second side wall 21, whereby the first side wall 20 and the second side wall 21 are configured in a stepped shape. After flowing through the first side wall 20, the air flowing from the front side 1 a of the vehicle 1 can flow rearward while contacting the second side wall 21 through the joint 24.

この第１側壁20と第２側壁21との接合部24である段部は、図3に示すように、長さｘが約10mm程度に形成される。 As shown in FIG. 3, the step portion which is the joint portion 24 between the first side wall 20 and the second side wall 21 has a length x of about 10 mm.

また、第３側壁22は、図4に示すように、第２側壁21の内方に形成され、バンパー２の中央部2bを構成してなる。バンパー２の上方には、テイルランプ３が設けられている。また、バンパー２は、下方に、排気ガスを外部に放出する排気口26を導出する導出枠27や、ライセンスプレート28を表出させるためのライセンスプレート枠29が形成されている。 Further, as shown in FIG. 4, the third side wall 22 is formed inward of the second side wall 21 and constitutes a central portion 2 b of the bumper 2. A tail lamp 3 is provided above the bumper 2. In addition, the bumper 2 is formed with a derivation frame 27 for deriving an exhaust port 26 that discharges exhaust gas to the outside and a license plate frame 29 for exposing the license plate 28.

（作用及び効果）
次に、上記のように構成された車両１の後部構造の作用及び効果について説明する。車両１が前方へ進行すると、車両１の周囲を空気が流れる。さらに速度を増して車両１が高速状態になると、車両１の周囲を流れる空気も高速になる。車両１のフロントバンパー６に当接した空気は、主にフロントバンパー６の上方および下方へと誘導され車両１の上部や下部を通って後方へと流れる。 (Function and effect)
Next, the operation and effect of the rear structure of the vehicle 1 configured as described above will be described. When the vehicle 1 travels forward, air flows around the vehicle 1. When the speed is further increased and the vehicle 1 enters a high speed state, the air flowing around the vehicle 1 also becomes high speed. The air in contact with the front bumper 6 of the vehicle 1 is mainly guided upward and downward of the front bumper 6 and flows backward through the upper and lower portions of the vehicle 1.

また、車両１の側面1aでは、空気が、フロントバンパー６、フロントフェンダー12、前輪、ドアパネル13、後輪、リアフェンダー14を経て、バンパー２へと流れる。このときの車両１の前方から後方へ流れる空気の流れは層流である。 On the side surface 1 a of the vehicle 1, air flows to the bumper 2 through the front bumper 6, the front fender 12, the front wheel, the door panel 13, the rear wheel, and the rear fender 14. The air flow flowing from the front to the rear of the vehicle 1 at this time is a laminar flow.

ところが、バンパー２は、車両１の側面1aに略平行な第１側壁20と、第１側壁20の後方であって前記第１側壁20より内方に形成された前記第１側壁20と略平行な第２側壁21とを備えることにより、第１側壁20と第２側壁21の接合部24において、空気の流れを乱し、渦流（図5中、破線矢印）を発生させる。 However, the bumper 2 is substantially parallel to the first side wall 20 substantially parallel to the side surface 1 a of the vehicle 1 and the first side wall 20 formed behind the first side wall 20 and inward from the first side wall 20. By providing the second side wall 21, the air flow is disturbed at the joint portion 24 between the first side wall 20 and the second side wall 21, and a vortex (a broken line arrow in FIG. 5) is generated.

そうすると、空気の流れは、バンパー２近傍において渦流となり、当該渦流の空気の流れの外側が層流となる（図5中、実線矢印）。このように接合部24において、空気の流れを層流と渦流とに分離する。このうち渦流となった空気は、第２側壁21に沿ってさらに後方へ流れる。そして、第２側壁21に沿って後方へ流れた渦流としての空気は、第１側壁20に沿って流れる層流を運ぶコロの役割を果たし、車両１の後コーナー部、すなわち第２側壁21と第３側壁22との境目を越えて、車両１の後部へ回りこまずに、層流の大部分を後方へ真っ直ぐ流し、車両１の内方と外方との間に空気の壁を形成する。 Then, the air flow becomes a vortex near the bumper 2, and the outside of the air flow of the vortex becomes a laminar flow (solid arrow in FIG. 5). In this way, the air flow is separated into a laminar flow and a vortex flow at the joint 24. Of these, the swirled air flows further rearward along the second side wall 21. The air as a vortex flow that flows backward along the second side wall 21 serves as a roller that carries a laminar flow that flows along the first side wall 20, and the rear corner portion of the vehicle 1, that is, the second side wall 21. Crossing the boundary with the third side wall 22, without flowing to the rear part of the vehicle 1, most of the laminar flow flows straight rearward to form an air wall between the inside and the outside of the vehicle 1. .

そうすると、従来であれば、車両１の側面1aを流れてきた空気が車両１の後コーナー部で車両１の後部へ回り込むが、本実施形態にかかるバンパー２では、渦流を発生させ、当該渦流となった空気の上に層流を車両１の後方へ真っ直ぐ流すことで、空気の壁を形成し、車両１の後部へ回り込もうとする空気の流れを遮る。これにより、車両１の後部構造は、車両１の後部へ回り込む空気の流れを遮断することができるので、空気抵抗を飛躍的に低減することができる。 Then, conventionally, the air flowing through the side surface 1a of the vehicle 1 wraps around the rear portion of the vehicle 1 to the rear portion of the vehicle 1. However, the bumper 2 according to the present embodiment generates a vortex, By flowing a laminar flow straight on the rear of the vehicle 1 to the rear of the vehicle 1, an air wall is formed to block the flow of air that tends to go around the rear of the vehicle 1. Thereby, since the rear part structure of the vehicle 1 can interrupt | block the flow of the air which wraps around to the rear part of the vehicle 1, it can reduce air resistance drastically.

このように、車両１の後部構造によれば、走行時における前方からの空気の流れを第１側壁20と第２側壁21の接合部24にて分離することにより、車両１の周囲の空気の流れをスムーズにさせることで空気抵抗を減少させ走行性能及び燃費性能を改善することができる。 Thus, according to the rear structure of the vehicle 1, the air flow from the front during traveling is separated at the joint 24 between the first side wall 20 and the second side wall 21, thereby By smoothing the flow, the air resistance can be reduced and the running performance and fuel consumption performance can be improved.

また、第１側壁20と第２側壁21との接合部24は、段部で構成したことにより、当該段部において、より確実に渦流を発生することができるので、より確実に第２側壁21の後方へ空気の壁を形成することができる。 In addition, since the joint portion 24 between the first side wall 20 and the second side wall 21 is formed of a stepped portion, a vortex can be generated more reliably in the stepped portion. An air wall can be formed in the rear of the air.

本発明は上記した実施形態に限定されるものではなく、本発明の趣旨の範囲内で適宜変更することが可能である。例えば、上記実施形態では、車両１がオープンカータイプである場合について説明したが、車室の天井部分が開閉せずに固定されたハードトップタイプの車両に適用することもできる。 The present invention is not limited to the above-described embodiment, and can be appropriately changed within the scope of the gist of the present invention. For example, in the above-described embodiment, the case where the vehicle 1 is an open car type has been described. However, the present invention can also be applied to a hard top type vehicle in which the ceiling portion of the passenger compartment is fixed without opening and closing.

１ 車両
５ 後輪
20 第１側壁
21 第２側壁
22 第３側壁
24 接合部 1 Vehicle 5 Rear wheel
20 1st side wall
21 Second side wall
22 3rd side wall
24 joints

Claims (2)

車両の後輪の後方を覆う後部構造において、前記後輪の表面に略平行に形成された第１側壁と、前記第１側壁の後方であって表面が前記第１側壁より内方であって前記第１側壁と略平行に形成された第２側壁と、前記第２側壁の後方に連続して形成され前記車両の内方へ延長された第３側壁とを備え、
前記第１側壁は、後方端において前記第２側壁と接合部を介して一体的に形成され、前記接合部は略鉛直方向へ延び、前記接合部は、前記第１側壁及び第２側壁に対し略直角に形成された段部であり、前記接合部により前記第１側壁と第２側壁とは階段状に構成されていることを特徴とする車両の後部構造。 In the rear structure that covers the rear of the rear wheel of the vehicle, a first side wall formed substantially parallel to the surface of the rear wheel, and a rear surface of the first side wall, the surface being inward of the first side wall. A second side wall formed substantially parallel to the first side wall; and a third side wall formed continuously behind the second side wall and extending inward of the vehicle;
The first side wall is integrally formed at the rear end with the second side wall via a joint portion, the joint portion extends in a substantially vertical direction, and the joint portion is connected to the first side wall and the second side wall. A rear structure of a vehicle, which is a step portion formed substantially at a right angle, and wherein the first side wall and the second side wall are formed in a step shape by the joint portion . 前記第１側壁と第２側壁との接合部である前記段部は、長さが約10ｍｍ程度に形成されていることを特徴とする請求項１記載の車両の後部構造。 2. The rear structure of a vehicle according to claim 1 , wherein the step portion, which is a joint portion between the first side wall and the second side wall, is formed to have a length of about 10 mm .
JP2009002592A 2009-01-08 2009-01-08 Rear structure of the vehicle Active JP4886796B2 (en)

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