JP6477632B2 - Lower rectification structure of automobile - Google Patents

Lower rectification structure of automobile Download PDF

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JP6477632B2
JP6477632B2 JP2016161782A JP2016161782A JP6477632B2 JP 6477632 B2 JP6477632 B2 JP 6477632B2 JP 2016161782 A JP2016161782 A JP 2016161782A JP 2016161782 A JP2016161782 A JP 2016161782A JP 6477632 B2 JP6477632 B2 JP 6477632B2
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recess
vehicle
width direction
vehicle width
underfloor
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JP2018030379A (en
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章博 中田
章博 中田
修一 中髪
修一 中髪
守英 山田
守英 山田
允也 西本
允也 西本
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Mazda Motor Corp
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/80Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/88Optimized components or subsystems, e.g. lighting, actively controlled glasses

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Description

この発明は、車体下面のリヤホイールハウス前方に凹部が設けられたような自動車の下部整流構造に関する。   The present invention relates to a lower rectification structure for an automobile in which a recess is provided in front of a rear wheel house on the lower surface of a vehicle body.

一般に、自動車は燃費向上を目的として、その床下を平面化することが行なわれている。
しかしながら、自動車は製造時やメンテナンス時に持上げるジャッキポイントが必要であって、その治具の取付け部がリヤホイールハウス前方に設けられることがあり、当該リヤホイールハウス前方には凹部が形成される。このため、該凹部により床下走行風が乱れたり、凹部からリヤホイールハウス内に流入した流入風がリヤホイールハウスから車体側方へ流出して、車体側面流が乱れるという問題があった。
In general, an automobile is flattened under the floor for the purpose of improving fuel consumption.
However, automobiles, a need jack points to lift during manufacture or maintenance, may mounting portion of the jig is provided in the front rear wheel house, recesses are formed in the front the rear wheel house . For this reason, there is a problem that the underfloor traveling wind is disturbed by the concave portion, or the inflow air flowing into the rear wheel house from the concave portion flows out from the rear wheel house to the side of the vehicle body, thereby disturbing the side flow of the vehicle body.

特許文献1には上述の如き凹部に可及的床下走行風が流入しないように傾斜ガイドを設けたものが開示されている。すなわち、車両底面視で直角三角形状の凹部を形成し、車両後方に位置する三角形の底辺に相当する部位に凹部後壁を形成する一方、上記凹部の前方には、車幅方向外側が車両前方に位置し、車幅方向内側が車両後方に位置する傾斜ガイドを設け、当該傾斜ガイドにより床下走行風を車幅方向内側へ案内して、床下走行風が可及的上記凹部に流入しないように構成したものである。 Patent Document 1, which as much as possible under the floor running wind to such recess described above is provided an inclined guide so as not to flow into is disclosed. That is, a concave portion having a right triangle shape is formed when viewed from the bottom of the vehicle, and a rear wall of the concave portion is formed at a portion corresponding to the bottom side of the triangle located at the rear of the vehicle. An incline guide that is located in the vehicle width direction is located behind the vehicle, and the underfloor traveling wind is guided in the vehicle width direction by the incline guide so that the underfloor traveling wind does not flow into the recess as much as possible. It is composed.

しかしながら、該特許文献1に開示された従来構造においては、床下走行風の一部は上記凹部に流入し、この流入風は勢いが弱い、言い換えると圧力が小さく、風量も少ないうえ、底面視で後方に拡幅する直角三角形状の凹部で拡散されるので、上記流入風がリヤホイールハウス内に回り込み、この回り込んだ風がリヤホイールハウスから車体側方へ流出して、車体側面流を乱すことになる。   However, in the conventional structure disclosed in Patent Document 1, a part of the underfloor traveling wind flows into the recess, and this inflowing wind has a low momentum, in other words, a low pressure, a small air volume, and a bottom view. Since it diffuses in a concave part with a right triangle shape that widens rearward, the above-mentioned inflow air flows into the rear wheel house, and this entrained air flows out from the rear wheel house to the side of the vehicle body, disturbing the side flow of the vehicle body. become.

特に、上記凹部の前壁に角の鋭いエッジが形成できない場合(例えば、床下平面化のために不織布のような繊維系素材から成るアンダカバーを採用した場合)には、床下走行風の適切な剥離作用が得られないため、上記凹部に流入した床下走行風が更にリヤホイールハウス内に回り込み易くなり、このようなリヤホイールハウスへの走行風の回り込みを防止するという観点で改善の余地があった。   In particular, when an edge with a sharp corner cannot be formed on the front wall of the concave portion (for example, when an under cover made of a fiber material such as a nonwoven fabric is used for under-floor planarization) Since the peeling action cannot be obtained, the underfloor traveling wind that has flowed into the recess is more likely to enter the rear wheel house, and there is room for improvement in terms of preventing such traveling wind from entering the rear wheel house. It was.

特許第5461715号公報Japanese Patent No. 5461715

そこで、この発明は、本来、床下走行風を流入させたくないリヤホイールハウス前方の凹部に敢えて床下走行風を集束させ、集束させることで床下走行風の動きを強めて、効果的に車両下方へ剥離し、床下走行風がリヤホイールハウス内に流入するのを抑制することができる自動車の下部整流構造の提供を目的とする。 Accordingly, the present invention is primarily, the rear wheel house in front of the recess do not want to flow into the underfloor running wind, dare it focuses the underfloor running wind, strengthen the movement of the underfloor traveling wind by focusing effectively vehicle lower An object of the present invention is to provide a lower rectification structure for an automobile that can be prevented from flowing into the rear wheel house.

この発明による自動車の下部整流構造は、車体下面のリヤホイールハウス前方に凹部が設けられた自動車の下部整流構造であって、上記凹部は前壁と後壁とを備え、上記後壁が車幅方向外側後方に延びると共に、車両下方に延設され、かつ上記凹部の後壁が上記リヤホイールハウスの車幅方向外側端よりも車幅方向内側に離間して設けられ、上記凹部の前壁は上記後壁の前方において車幅方向内側後方へ傾斜して延設され、上記前壁の下面縁部に、床下風の剥離促進用のエッジ部を有するガイド部が設けられたものである。
上述の車幅方向外側後方に延びる後壁は、車幅方向内側から車幅方向外側後方に向けて傾斜状に形成してもよく、あるいは、車幅方向内側から車幅方向外側後方に向けて段階的に延びるよう形成してもよい。
A lower rectifying structure for an automobile according to the present invention is a lower rectifying structure for an automobile in which a recess is provided in front of a rear wheel house on a lower surface of a vehicle body. The recess includes a front wall and a rear wall, and the rear wall is a vehicle width. Extending rearwardly in the direction of the vehicle and extending downward in the vehicle, and the rear wall of the recess is provided inward of the outer side of the rear wheel house in the vehicle width direction. The front wall of the recess is In the front of the rear wall, it is inclined and extended inward in the vehicle width direction, and a guide portion having an edge portion for promoting separation of underfloor wind is provided on the lower surface edge portion of the front wall .
The above-described rear wall extending rearward in the vehicle width direction may be formed in an inclined shape from the inner side in the vehicle width direction toward the rear rear in the vehicle width direction, or from the inner side in the vehicle width direction toward the rear rear in the vehicle width direction. You may form so that it may extend in steps.

上記構成によれば、本来、床下走行風を流入させたくないリヤホイールハウス前方の凹部に、敢えて床下走行風を集束させ、集束させることで床下走行風の動きを強め、当該床下走行風を、凹部後壁の車両下方に延設された部位にて、効果的に下方へ剥離し、以て、床下走行風がリヤホイールハウス内に流入するのを抑制することができる。このように、床下走行風の集束効果により、エッジが形成しにくい場合にあっても、当該床下走行風を集束させて車両下方にガイドすることで、確実に剥離させることができる。   According to the above configuration, the movement of the underfloor traveling wind is strengthened by focusing the underfloor traveling wind on the concave portion in front of the rear wheel house where the underfloor traveling wind is not desired to flow. It is possible to effectively peel downward at a portion of the rear wall of the concave portion that extends downward from the vehicle, thereby suppressing underfloor traveling wind from flowing into the rear wheel house. Thus, even when it is difficult to form an edge due to the convergence effect of the underfloor traveling wind, the underfloor traveling wind can be reliably peeled off by converging and guiding the vehicle under the vehicle.

しかも、上記凹部の前壁は上記後壁の前方において車幅方向内側後方へ傾斜して延設され、上記前壁の下面縁部に、床下風の剥離促進用のエッジ部を有するガイド部が設けられたものであるから、上記前壁のガイド部により余分な風を上記凹部よりも車幅方向内側へ排除したうえで、凹部と対応する位置で車両前方から車両後方へ流れる床下走行風のうち車幅方向外側の風(床下外側風)が、上記ガイド部のエッジ部で剥離され、この剥離風と凹部との間に負圧領域が発生し、上記床下走行風のうち車幅方向内側の風(床下内側風)を、負圧領域に引込んで、凹部の後壁のうち車幅方向外側に床下外側風と床下内側風とを集束させる。 In addition , the front wall of the recess is inclined and extended inward in the vehicle width direction in front of the rear wall, and a guide portion having an edge portion for promoting separation of underfloor wind is provided on the lower surface edge of the front wall. since those provided, of the front wall the excess air by the guide unit after having eliminated the vehicle width direction inner side than the concave portion, the floor traveling wind flowing from the front of the vehicle at a position corresponding to the recess to the rear of the vehicle Of these, wind outside the vehicle width direction (underfloor outside wind) is peeled off at the edge of the guide part, and a negative pressure region is generated between the peeled wind and the recessed portion. Wind (underfloor inner wind) is drawn into the negative pressure region, and the underfloor outer wind and underfloor inner wind are focused on the outer side in the vehicle width direction on the rear wall of the recess.

この集束により、床下走行風の動きを強めることで、当該床下走行風を、凹部後壁の車両下方に延設された部位にて、効果的に下方へ剥離して、床下走行風がリヤホイールハウス内に流入するのを抑制することができる。
また、上述の床下外側風と床下内側風とを負圧領域を利用して凹部後壁の車幅方向外側に集束させることで、車体側面に流出するのを防止することができる。
This focusing strengthens the movement of the underfloor running wind, and the underfloor running wind is effectively peeled downward at the portion of the rear wall of the recessed portion that extends below the vehicle so that the underfloor running wind is separated from the rear wheel. Inflow into the house can be suppressed.
Further, the above-described underfloor outer wind and underfloor inner wind are converged to the outside in the vehicle width direction of the rear wall of the recess using the negative pressure region, so that it can be prevented from flowing out to the side surface of the vehicle body.

この発明の一実施態様においては、上記車体下面は、フロントホイールハウス後縁から上記凹部までサイドシルに沿って後方に延びる側方凹部が設けられる一方、上記サイドシルの後端に設けられたデフレクタが、上記凹部の後壁よりも車幅方向外側に延設されたものである。
上記構成によれば、上述の側方凹部により、前輪下部やフロントホイールハウス内の空気を上記凹部まで導き、床下風と共に凹部後壁の車幅方向外側に集束させて、車体側面に流出するのを防止することができると共に、床下走行風の動きを更に強めることができる。
In one embodiment of the present invention, the vehicle body lower surface is provided with a side recess extending rearward along the side sill from the rear edge of the front wheel house to the recess, while a deflector provided at the rear end of the side sill, It extends outside the rear wall of the recess in the vehicle width direction.
According to the above configuration, the air in the lower part of the front wheel or the front wheel house is guided to the concave portion by the side concave portion described above , converged on the vehicle width direction outside of the rear wall of the concave portion together with the underfloor wind, and flows out to the side surface of the vehicle body. Can be prevented, and the movement of the underfloor traveling wind can be further strengthened.

この発明の一実施態様においては、上記車体下面はフロアアンダカバーで形成され、該フロアアンダカバーの後壁下端には車両後方に延びるフランジ部が形成されたものである。   In one embodiment of the present invention, the lower surface of the vehicle body is formed of a floor under cover, and a flange portion extending rearward of the vehicle is formed at the lower end of the rear wall of the floor under cover.

上記構成によれば、上述のフランジ部によるフロアアンダカバーの凹部後壁の補強と、フランジ部による床下走行風の剥離性確保との両立を図ることができる。   According to the above configuration, it is possible to achieve both the reinforcement of the rear wall of the recessed portion of the floor under cover by the flange portion and the securing of the peelability of the underfloor traveling wind by the flange portion.

この発明による自動車の下部整流構造は、また、車体下面のリヤホイールハウス前方に凹部が設けられた自動車の下部整流構造であって、上記凹部は前壁と後壁とを備え、上記後壁が車幅方向外側後方に延びると共に、車両下方に延設され、かつ上記凹部の後壁が上記リヤホイールハウスの車幅方向外側端よりも車幅方向内側に離間して設けられ、上記凹部はジャッキアップポイント形成用の凹部であることを特徴とする The lower rectifying structure for an automobile according to the present invention is also a lower rectifying structure for an automobile provided with a recess in front of the rear wheel house on the lower surface of the vehicle body, the recess including a front wall and a rear wall, and the rear wall is Extending rearward in the vehicle width direction and extending downward in the vehicle, the rear wall of the recess is provided at an inner side in the vehicle width direction from the outer end in the vehicle width direction of the rear wheel house. It is a recess for forming an up point .

上記構成によれば、本来、床下走行風を流入させたくないリヤホイールハウス前方の凹部に、敢えて床下走行風を集束させ、集束させることで床下走行風の動きを強め、当該床下走行風を、凹部後壁の車両下方に延設された部位にて、効果的に下方へ剥離し、以て、床下走行風がリヤホイールハウス内に流入するのを抑制することができる。このように、床下走行風の集束効果により、エッジが形成しにくい場合にあっても、当該床下走行風を集束させて車両下方にガイドすることで、確実に剥離させることができる
しかも、上述の如き効果を奏しつつ、上述の凹部により自動車の製造時、メンテナンス時に必要なジャッキアップポイントを確保することができる
According to the above configuration, the movement of the underfloor traveling wind is strengthened by focusing the underfloor traveling wind on the concave portion in front of the rear wheel house where the underfloor traveling wind is not desired to flow. It is possible to effectively peel downward at a portion of the rear wall of the concave portion that extends downward from the vehicle, thereby suppressing underfloor traveling wind from flowing into the rear wheel house. Thus, even when it is difficult to form an edge due to the convergence effect of the underfloor traveling wind, the underfloor traveling wind can be reliably peeled off by converging and guiding the vehicle under the vehicle .
In addition, the jack-up points required during the manufacture and maintenance of the automobile can be secured by the above-described recesses while exhibiting the effects as described above.

この発明によれば、本来、床下走行風を流入させたくないリヤホイールハウス前方の凹部に敢えて床下走行風を集束させ、集束させることで床下走行風の動きを強めて、効果的に車両下方へ剥離し、床下走行風がリヤホイールハウス内に流入するのを抑制することができる効果がある。 According to the present invention, the underfloor traveling wind is intentionally focused on the concave portion in front of the rear wheel house where the underfloor traveling wind is not desired to flow. There is an effect that the underfloor traveling wind can be suppressed from flowing into the rear wheel house.

本発明の下部整流構造を備えた自動車の底面図The bottom view of the motor vehicle provided with the lower rectification | straightening structure of this invention フロアアンダカバーを車両下方から見た状態で示す斜視図A perspective view showing the floor under cover as viewed from below the vehicle 図1の要部拡大図1 is an enlarged view of the main part of FIG. 自動車の下部整流構造を車両下方から見た状態で示す斜視図The perspective view which shows the lower rectification | straightening structure of a motor vehicle in the state seen from the vehicle downward direction 図3のA−A線に沿う要部の拡大断面図The expanded sectional view of the principal part in alignment with the AA of FIG. 図3のB−B線に沿う要部の矢視断面図FIG. 3 is a cross-sectional view of the main part along the line BB in FIG. 図3のC−C線に沿うフロアアンダカバーの矢視断面図Cross-sectional view of the floor undercover along the line CC in FIG. 図6の要部拡大図Enlarged view of the main part of FIG.

本来、床下走行風を流入させたくないリヤホイールハウス前方の凹部に敢えて床下走行風を集束させ、集束させることで床下走行風の動きを強めて、効果的に車両下方へ剥離し、床下走行風がリヤホイールハウス内に流入するのを抑制するという目的を、車体下面のリヤホイールハウス前方に凹部が設けられた自動車の下部整流構造において、上記凹部は前壁と後壁とを備え、上記後壁が車幅方向外側後方に延びると共に、車両下方に延設され、かつ上記凹部の後壁が上記リヤホイールハウスの車幅方向外側端よりも車幅方向内側に離間して設けられ、上記凹部の前壁は上記後壁の前方において車幅方向内側後方へ傾斜して延設され、上記前壁の下面縁部に、床下風の剥離促進用のエッジ部を有するガイド部が設けられるという構成にて実現した。 Originally, the rear wheel house in front of the recess do not want to flow into the underfloor running wind, dare focuses the underfloor running wind, strengthen the movement of the underfloor traveling wind by focusing, effectively stripping the bottom of the vehicle, under the floor traveling In the lower rectification structure of an automobile in which a recess is provided in front of the rear wheel house on the lower surface of the vehicle body, the recess includes a front wall and a rear wall for the purpose of suppressing wind from flowing into the rear wheel house. A rear wall extending rearwardly in the vehicle width direction and extending downward in the vehicle; and a rear wall of the recess is provided farther inward in the vehicle width direction than an outer end in the vehicle width direction of the rear wheel house , front wall of the recess extends inclined inwardly in the vehicle width direction behind the front of the rear wall, the lower surface edge of the front wall, that the guide portion having an edge portion for peeling promotion of underfloor air is provided Actually with the configuration It was.

この発明の一実施例を以下図面に基づいて詳述する。
図面は自動車の下部整流構造を示し、図1は当該下部整流構造を備えた自動車の底面図である。
自動車の下部整流構造の詳細な説明に先立って、まず、図1を参照して車体構造について説明する。
An embodiment of the present invention will be described in detail with reference to the drawings.
The drawing shows a lower rectifying structure of an automobile, and FIG. 1 is a bottom view of the automobile provided with the lower rectifying structure.
Prior to detailed description of the lower rectifying structure of the automobile, first, the vehicle body structure will be described with reference to FIG.

図1に示すように、エンジンルームには、エンジンを搭載すると共に、前輪1を懸架するフロントサスペンションを取付けるためのサブフレーム2が設けられている。このサブフレーム2は、前部において車幅方向に延びるフロントクロスメンバ(図示せず)と、後部において車幅方向に延びるリヤクロスメンバ3と、車両の前後方向に延びる左右のサイドメンバ4,4とを備えている。   As shown in FIG. 1, the engine room is provided with a subframe 2 for mounting an engine and attaching a front suspension for suspending a front wheel 1. The sub-frame 2 includes a front cross member (not shown) extending in the vehicle width direction at the front portion, a rear cross member 3 extending in the vehicle width direction at the rear portion, and left and right side members 4, 4 extending in the front-rear direction of the vehicle. And.

図1に示すように、エンジンルームの下方部はフロントアンダカバー5で覆われると共に、前輪1用のスプラッシュシールド(いわゆる、泥除け部材)6の下端部と、フロントアンダカバー5の側端部と、フロントバンパ7のサイド部とで囲繞された底面視略三角形状の領域、つまり前輪1前方の床下にはデフレクタ8が設けられている。   As shown in FIG. 1, the lower part of the engine room is covered with a front under cover 5, a lower end portion of a splash shield (so-called mudguard member) 6 for the front wheel 1, a side end portion of the front under cover 5, A deflector 8 is provided in a substantially triangular area viewed from the bottom, which is surrounded by the side portion of the front bumper 7, that is, under the floor in front of the front wheel 1.

フロアパネル9(図5参照)の左右両側部において、図1に示すように、車両の前後方向に延びる閉断面構造のサイドシル10を設け、このサイドシル10の少なくとも車幅方向外側部を、車両前後方向に延びるドア下ガーニッシュ11で覆っている。   As shown in FIG. 1, a side sill 10 having a closed cross-sectional structure extending in the front-rear direction of the vehicle is provided on both left and right side portions of the floor panel 9 (see FIG. 5). It is covered with a garnish 11 under the door extending in the direction.

図5(図5は後述する図3のA−A線に沿う要部の拡大断面図)に示すように、フロアパネル9の後部には、上方に立上がるキックアップ部12を介して後方に延びるリヤフロア13(フロアパネルの一部)を連設しており、上述のキックアップ部12の背面(リヤ側の面)とリヤフロア13の前部下面との間には、車幅方向に延びるクロスメンバロア14(いわゆる、No.3クロスメンバ)を取付け、キックアップ部12およびリヤフロア13と、クロスメンバロア14との間には、車幅方向に延びる閉断面15を形成している。
また、上述のキックアップ部12の上面には、クロスメンバアッパ16を取付け、このクロスメンバアッパ16とキックアップ部12上面との間には、車幅方向に延びる閉断面17を形成している。
As shown in FIG. 5 (FIG. 5 is an enlarged cross-sectional view of a main part taken along the line AA in FIG. 3 described later), the rear portion of the floor panel 9 is disposed rearward via a kick-up portion 12 rising upward. An extending rear floor 13 (a part of the floor panel) is continuously provided, and a cross extending in the vehicle width direction is provided between the back surface (rear side surface) of the kick-up portion 12 and the front lower surface of the rear floor 13. A member lower 14 (so-called No. 3 cross member) is attached, and a closed cross section 15 extending in the vehicle width direction is formed between the kick-up portion 12 and the rear floor 13 and the cross member lower 14.
A cross member upper 16 is attached to the upper surface of the kick-up portion 12 described above, and a closed cross section 17 extending in the vehicle width direction is formed between the cross member upper 16 and the upper surface of the kick-up portion 12. .

図5に示すように、上述のクロスメンバロア14およびクロスメンバアッパ16から車両後方に離間した位置のリヤフロア13の上下には、リヤクロスメンバアッパ18とリヤクロスメンバロア19とを上下対向位置に取付けている。   As shown in FIG. 5, the rear cross member upper 18 and the rear cross member lower 19 are vertically opposed to each other above and below the rear floor 13 at a position spaced rearward from the cross member lower 14 and the cross member upper 16. It is installed.

そして、上述のリヤクロスメンバアッパ18とリヤフロア13との間、並びに、リヤクロスメンバロア19とリヤフロア13との間には、車幅方向に延びる閉断面20,21を形成している。   Close cross sections 20 and 21 extending in the vehicle width direction are formed between the above-described rear cross member upper 18 and the rear floor 13 and between the rear cross member lower 19 and the rear floor 13.

図5に示すように、クロスメンバロア14(No.3クロスメンバ)とリヤクロスメンバロア19(No.4クロスメンバ)との間におけるリヤフロア13の下方部には、燃料タンク22を配設している。この燃料タンク22は、左右一対のタンク固定バンド23,23(但し、図面では一方のタンク固定バンドのみを示す)で支持されるもので、タンク固定バンド23の前端部は、ボルト、ナット等の取付け部材24によりクロスメンバロア14に固定されており、タンク固定バンド23の後端部は、ボルト、ナット等の取付け部材25によりリヤクロスメンバロア19に固定されている。   As shown in FIG. 5, a fuel tank 22 is disposed below the rear floor 13 between the cross member lower 14 (No. 3 cross member) and the rear cross member lower 19 (No. 4 cross member). ing. The fuel tank 22 is supported by a pair of left and right tank fixing bands 23 and 23 (however, only one tank fixing band is shown in the drawing), and the front end of the tank fixing band 23 is a bolt, a nut or the like. The tank fixing band 23 is fixed to the rear cross member lower 19 by mounting members 25 such as bolts and nuts.

一方、図1に示すように、リヤフロア13の左右両サイド下部に接合固定されて車両の前後方向に延びる閉断面構造のリヤサイドフレーム26には、リヤサスペンション装置取付け用のサブフレーム27が複数のブッシュを介して支持されている。このサブフレーム27は、車幅方向に延びるフロントクロスメンバ28と、車幅方向に延びるリヤクロスメンバ29と、車両の略前後方向に延びる左右一対のサイドメンバ30,30とを底面視で略井桁状に組合せたものである。 On the other hand, as shown in FIG. 1, the rear side frame 26 having a closed cross-section structure that is joined and fixed to the lower portions of the left and right sides of the rear floor 13 and extends in the front-rear direction of the vehicle has a plurality of sub-frames 27 for mounting the rear suspension device. It is supported via a bush. The sub-frame 27 includes a front cross member 28 extending in the vehicle width direction, a rear cross member 29 extending in the vehicle width direction, and a pair of left and right side members 30, 30 extending substantially in the front-rear direction of the vehicle. It is a combination.

また、図1に示すように、後輪31のナックルとリヤクロスメンバ29との間にロアアーム32を設け、ナックルとフロントクロスメンバ28との間にトーコントロールリンク33を設け、ナックルとその前方の車体との間にトレーリングアーム(図示せず)を設けると共に、ナックルと、リヤホイールハウスのダンパ取付け部との間にダンパ(いわゆる、ストラットダンパ)を設けることで、リヤサスペンション装置を構成している。 Further, as shown in FIG. 1, a lower arm 32 is provided between the knuckle of the rear wheel 31 and the rear cross member 29 , a toe control link 33 is provided between the knuckle and the front cross member 28, and the knuckle and the front thereof. A rear suspension device is constructed by providing a trailing arm (not shown) between the vehicle body and a damper (so-called strut damper) between the knuckle and the damper mounting portion of the rear wheel house. doing.

ところで、エンジンルームと車室とを前後方向に仕切るダッシュロアパネルの前方に設けられたエンジンには排気系部品が接続されている。図1に示すように、エンジンの排気系部品としては、触媒による排気ガスの浄化手段としてのキャタリスト34が介設された排気管35と、この排気管35の下流端に連通接続された消音器としてのサイレンサ36と、該サイレンサ36の左右両サイドに接続されたテールパイプ37,37とを備えており、図1に示すように、上述の排気管35はトンネル部の車外側つまり下側を通って後方に延びると共に、図1に示すように、燃料タンク22の下方を通ってさらに後方に延びている。 By the way, an exhaust system component is connected to an engine provided in front of a dash lower panel that partitions the engine room and the vehicle compartment in the front-rear direction. As shown in FIG. 1, the exhaust system parts of the engine include an exhaust pipe 35 provided with a catalyst 34 as a means for purifying exhaust gas by a catalyst, and a muffler connected in communication with the downstream end of the exhaust pipe 35. a silencer 36 as a vessel, and a tail pipe 37, 37 left and right are connected on both sides of the silencer 36, as shown in FIG. 1, the exhaust pipe 35 described above, the vehicle exterior clogging of a tunnel section As shown in FIG. 1, it extends rearward through the lower side of the fuel tank 22 and extends rearward.

図1に示すように、排気管35上部と燃料タンク22下部との間には、インシュレータ38が配設されている。
また、図1に示すように、上述のキャタリスト34の前部に対応して、トンネルブレース39を設けている。このトンネルブレース39はトンネル部の下部に位置する車体剛性部材としての左右一対のトンネルメンバ間を車幅方向に連結するもので、該トンネルブレース39の前方下側にはトンネル下カバー40が設けられている。
As shown in FIG. 1, an insulator 38 is disposed between the upper part of the exhaust pipe 35 and the lower part of the fuel tank 22.
Further, as shown in FIG. 1, a tunnel brace 39 is provided corresponding to the front part of the above-mentioned catalyst 34. This tunnel brace 39 connects a pair of left and right tunnel members as a vehicle body rigid member located in the lower part of the tunnel portion in the vehicle width direction. A tunnel lower cover 40 is provided on the lower front side of the tunnel brace 39. ing.

図2は床下部材としてのフロアアンダカバーを車両下方から見た状態で示す斜視図、図3は図1の要部拡大図、図4は自動車の下部整流構造を車両下方から見た状態で示す斜視図、図5は図3のA−A線に沿う要部の拡大断面図、図6は図3のB−B線に沿う要部の矢視断面図、図7は図3のC−C線に沿うフロアアンダカバーの矢視断面図、図8は図6の要部拡大図である。   2 is a perspective view showing a floor undercover as an underfloor member as seen from the lower side of the vehicle, FIG. 3 is an enlarged view of a main part of FIG. 1, and FIG. 4 shows a lower rectifying structure of the automobile as seen from the lower side of the vehicle. FIG. 5 is an enlarged cross-sectional view of the main part along the line AA in FIG. 3, FIG. 6 is a cross-sectional view of the main part along the line BB in FIG. 3, and FIG. FIG. 8 is a cross-sectional view of the floor under cover along the C line, and FIG. 8 is an enlarged view of a main part of FIG.

次に、自動車の下部整流構造について詳述する。
図1に示すように、車体の床下における前輪1と後輪31との間、この実施例では、トンネル部の下面側左右における前輪1と後輪31との間には床下部材としてのフロアアンダカバー50,50(以下、単にアンダカバーと略記する)が設けられている。
Next, the lower rectification structure of the automobile will be described in detail.
As shown in FIG. 1, between the front wheels 1 and rear wheels 31 of the vehicle body under the floor, in this embodiment, between the front wheels 1 and rear wheels 31 on the lower surface side left and right tunnel portion, the floor of the underfloor member Undercovers 50 and 50 (hereinafter simply referred to as undercovers) are provided.

図2はアンダカバー50の底面斜視図であって、図2の図示上側のアンダカバー50は車両左側のアンダカバー50Lであり、図2の図示下側のアンダカバー50は車両右側のアンダカバー50Rである。これら左右の各アンダカバー50L,50Rは左右略対称に形成されている。   2 is a bottom perspective view of the under cover 50. The upper under cover 50 shown in FIG. 2 is an under cover 50L on the left side of the vehicle, and the lower under cover 50 shown in FIG. 2 is an under cover 50R on the right side of the vehicle. It is. The left and right undercovers 50L and 50R are formed substantially symmetrically.

図1に示すように、上述のアンダカバー50,50は、トンネル部を除いて車体の床面(フロアパネル9参照)を下方から覆うもので、この実施例では、図2に示すように、該アンダカバー50は前側部材51と後側部材52との2部材から構成されており、これら前側部材51と後側部材52とを車両前後方向に沿って一体化している。   As shown in FIG. 1, the above-described under covers 50, 50 cover the floor of the vehicle body (see the floor panel 9) from below except for the tunnel portion. In this embodiment, as shown in FIG. The under cover 50 includes two members, a front member 51 and a rear member 52, and the front member 51 and the rear member 52 are integrated along the vehicle front-rear direction.

また、この実施例では、上述のアンダカバー50はその主要部が不織布で構成されている。具体的には、不織布にバインダとしての樹脂を含浸させたもの、また、ラバーシートや樹脂シートと積層したものを、押し固めて構成しており、このように、アンダカバー50の主要部を、繊維質を含む不織布で構成することにより、コーナ部(いわゆる角部)の成形性が悪く剥離部の形成に不利な素材(不織布)を有効活用し、素材の特質である軽量で、吸音性に優れ、かつ割れに強い点を活かしつつ、走行風の整流性を確保すると共に、軽量化と静粛性とを高めるように構成したものである。 Further, in this embodiment, the under cover 50 described above is composed of a nonwoven fabric as a main part. Specifically, a nonwoven fabric impregnated with a resin as a binder, or a laminate of a rubber sheet or a resin sheet is pressed and configured. Thus, the main part of the undercover 50 is By using a non-woven fabric containing fibers, the material (non-woven fabric), which has a poor formability at the corner (so-called corner) and is unfavorable for the formation of the peeling part, is effectively utilized. good, and, while taking advantage of the points strong cracking, while ensuring the rectification of the traveling wind, which is constituted so as to increase the weight and quiet.

図2に示すように、アンダカバー50はその前側部材51および後側部材52に車両前後方向に延びる略平坦な整流面としての床面53,54を有している。 As shown in FIG. 2, the undercover 50 has a floor 53, 54 of a substantially flat straightening surface extending in the longitudinal direction of the vehicle on a front-side member 51 and the rear member 52.

図2に示すように、左右一対の前側部材51,51がトンネル部側において対向する部分には、車両前後方向に延びる側面55と、車両前後方向に延びる下面56との間に、車両前後方向に延びる角部稜線L1が形成されており、この角部稜線L1には車体上方側へ窪んだ凹状の車体取付け部57が設けられている。   As shown in FIG. 2, the vehicle front-rear direction is formed between a side surface 55 extending in the vehicle front-rear direction and a lower surface 56 extending in the vehicle front-rear direction at a portion where the pair of left and right front members 51, 51 oppose each other on the tunnel side. A corner ridgeline L1 extending in the direction of the vehicle is formed, and a concave vehicle body mounting portion 57 that is recessed toward the vehicle body upper side is provided on the corner ridgeline L1.

同様に、左右一対の後側部材52,52がトンネル部側において対向する部分には、車両前後方向に延びる側面58と、車両前後方向に延びる下面59との間に、車両前後方向に延びる角部稜線L2が形成されており、この角部稜線L2にも車体上方側へ窪んだ凹状の車体取付け部60が設けられている。   Similarly, at a portion where the pair of left and right rear members 52, 52 face each other on the tunnel portion side, an angle extending in the vehicle longitudinal direction between a side surface 58 extending in the vehicle longitudinal direction and a lower surface 59 extending in the vehicle longitudinal direction. A ridge line L2 is formed, and the corner ridge line L2 is also provided with a concave vehicle body mounting portion 60 that is recessed toward the upper side of the vehicle body.

図1の要部を拡大して図3に示すように、車体下面のリヤホイールハウス61の直前方には、アンダカバー50における後側部材52の後部に凹部62が設けられている。   As shown in FIG. 3, the main part of FIG. 1 is enlarged, and a recess 62 is provided in the rear part of the rear member 52 of the under cover 50 in front of the rear wheel house 61 on the lower surface of the vehicle body.

ここで、図面では図示の便宜上、リヤホイールハウス61により形成されたホイールアーチを覆うアーチモール63を示している。
また、上述の凹部62はジャッキアップポイント形成用の凹部であって、この凹部62により、自動車の製造時やメンテナンス時に必要となるジャッキアップポイントを確保するものである。
Here, for convenience of illustration, the drawings show an arch molding 63 that covers a wheel arch formed by the rear wheel house 61.
The concave portion 62 is a concave portion for forming a jack-up point, and the concave portion 62 ensures a jack-up point that is necessary at the time of manufacturing or maintaining the automobile.

図2,図3,図4に示すように、上述の凹部62は後側部材52の床面54から車両上方に窪んだもので、該凹部62は前壁64、側壁65、後壁66を備えている。   As shown in FIGS. 2, 3, and 4, the recess 62 described above is recessed from the floor 54 of the rear member 52 to the upper side of the vehicle, and the recess 62 has a front wall 64, a side wall 65, and a rear wall 66. I have.

図2,図3に示すように、上述の後壁66は車幅方向内側が車両前方に位置し、車幅方向外側が車両後方に位置するように、車幅方向内側から車幅方向外側に向けて、車幅方向外側後方に段階的に延びると共に、図4,図6に示すように、車両下方に延設されており、該後壁66の下端には、車両後方に延びるフランジ部67が形成されている。 Figure 2, as shown in FIG. 3, the rear wall 66 of the above is situated in front of the vehicle inner side in the vehicle width direction, as the vehicle width direction outer side is positioned rearward, the vehicle width direction outside from the inside in the vehicle width direction 4 and 6 and extending downward in the vehicle width direction, as shown in FIGS. 4 and 6, and a flange portion extending rearward of the vehicle at the lower end of the rear wall 66 67 is formed.

図3,図6に示すように、上述の後壁66における車幅方向外端部には、車体に対する取付け部68が凹設形成されており、図6に示すように、この取付け部68はボルト、ナット等の取付け部材69を用いて、サイドシル10の底壁部10aに取付けられている。   As shown in FIGS. 3 and 6, a mounting portion 68 for the vehicle body is formed to be recessed in the outer end portion of the rear wall 66 in the vehicle width direction. As shown in FIG. It is attached to the bottom wall portion 10a of the side sill 10 using an attachment member 69 such as a bolt or a nut.

図3に示すように、上述の後壁66における側壁65の近傍部には、円弧状に湾曲形成された緩傾斜部66aが形成されており、この緩傾斜部66aで床下走行風の再付着の円滑化を図るよう構成している。   As shown in FIG. 3, in the vicinity of the side wall 65 of the rear wall 66 described above, a gently inclined portion 66a that is curved in an arc shape is formed, and this gentle inclined portion 66a reattaches the underfloor traveling wind. It is configured to facilitate smoothing.

同図に示すように、上述の緩傾斜部66aの車幅方向外側には、凹部62の後壁66に沿って一旦下方に突出した後に、床面54に沿って車両後方に真っ直ぐ延びる縦壁70が設けられている。   As shown in the figure, on the outer side in the vehicle width direction of the above-mentioned gently inclined portion 66a, a vertical wall that protrudes downward along the rear wall 66 of the recess 62 and then extends straight rearward along the floor surface 54. 70 is provided.

図3に示すように、上述の凹部62の前壁64は後壁66の前方において車幅方向内側後方へ傾斜して延設されている。すなわち、該前壁64は車幅方向外側が車両前方に位置し、車幅方向内側が車両後方に位置するよう傾斜状に延設されたものである。   As shown in FIG. 3, the front wall 64 of the above-described recess 62 extends obliquely inward in the vehicle width direction in front of the rear wall 66. That is, the front wall 64 extends in an inclined manner so that the outer side in the vehicle width direction is located in the front of the vehicle and the inner side in the vehicle width direction is located in the rear of the vehicle.

図3,図7に示すように、上述の前壁64の下面縁部には、床下風の剥離促進用のエッジ部71を有するガイド部72が設けられている。図7に示すように、上述のガイド部72は車両後方かつ下方に傾斜する傾斜ガイド部であって、エッジ部71に沿ってスリット73と連結部74とが交互に形成されている。   As shown in FIGS. 3 and 7, a guide portion 72 having an edge portion 71 for facilitating the separation of the underfloor wind is provided on the lower surface edge portion of the front wall 64 described above. As shown in FIG. 7, the above-described guide portion 72 is an inclined guide portion that is inclined backward and downward in the vehicle, and slits 73 and connecting portions 74 are alternately formed along the edge portion 71.

図3,図6に示すように、上述のサイドシル10の後端には、デフレクタ75が設けられている。このデフレクタ75は、アンダカバー50における後側部材52の車幅方向外側後端とサイドシル10との間の隙間を塞ぐと共に、図6に示すように、該デフレクタ75はフランジ部67よりもさらに下方に延び、縦壁70の下辺部と略同一位置で下方に延びている。   As shown in FIGS. 3 and 6, a deflector 75 is provided at the rear end of the side sill 10 described above. The deflector 75 closes the gap between the rear end of the rear member 52 in the vehicle width direction of the under cover 50 and the side sill 10, and the deflector 75 is further below the flange portion 67 as shown in FIG. Extending downward at substantially the same position as the lower side of the vertical wall 70.

図3に示すように、凹部62の前壁64が後壁66の前方において車幅方向内側後方に傾斜して延設され、その下面縁部に、エッジ部71を有するガイド部72が設けられたことで、前壁64のガイド部72により余分な風e1を凹部62よりも車幅方向内側へ排除する。また、縦壁70よりも車幅方向内側に相当する位置において、車両前方から車両後方に流れる床下走行風e2はエッジ部71で剥離した後に、緩傾斜部66aへ再付着し、再付着後においては上述の縦壁70で車幅方向外側へ行かないようにガイドして、車両後方に真っ直ぐに流す。 As shown in FIG. 3, the front wall 64 of the recess 62 extends obliquely inwardly in the vehicle width direction in front of the rear wall 66, and a guide portion 72 having an edge portion 71 is provided on the lower surface edge thereof. As a result, the excess wind e1 is removed from the recess 62 to the inside in the vehicle width direction by the guide portion 72 of the front wall 64. Further, at a position corresponding to the vehicle width direction inside than the vertical wall 70, floor traveling wind e2 flowing from the front of the vehicle to the vehicle rear, after peeling at the edge portion 71, and reattached to the gentle slope portion 66a, reattachment after Is guided so as not to go outward in the vehicle width direction by the vertical wall 70 described above, and flows straight to the rear of the vehicle.

凹部62と対応する位置で車両前方から車両後方へ流れる床下走行風e3,e4のうち車幅方向外側の風(床下外側風e3)は、ガイド部72のエッジ部71で剥離され、図7に示すように、この剥離風と凹部62との間に負圧領域npが発生し、上述の床下走行風e3,e4のうち車幅方向内側の風(床下内側風e4)を、負圧領域の負圧により引込んで、凹部62の後壁66のうち車幅方向外側に床下外側風e3と床下内側風e4とを集束させる。   Of the underfloor traveling winds e3 and e4 flowing from the front of the vehicle to the rear of the vehicle at a position corresponding to the recess 62, the wind on the outer side in the vehicle width direction (underfloor outer wind e3) is peeled off at the edge portion 71 of the guide portion 72, as shown in FIG. As shown, a negative pressure region np is generated between the separation wind and the recess 62, and the wind inside the vehicle width direction (the underfloor inner wind e4) of the underfloor traveling winds e3 and e4 is The underfloor outer wind e3 and the underfloor inner wind e4 are converged on the outer side in the vehicle width direction of the rear wall 66 of the recess 62 by being drawn in by negative pressure.

この集束により、床下走行風の動きを強め、かつ床下内側風e4を一旦後壁66に再付着させて、図8に示すように当該床下走行風e3,e4を、凹部62の後壁66が車両下方に延設された部位にて、効果的に下方へ剥離して、床下走行風e3,e4がリヤホイールハウス61に流入するのを抑制すると共に、床下外側風e3と床下内側風e4とを凹部62の後壁66における車幅方向外側に集束させることで、車体側面に流出するのを防止すべく構成したものである。 This focusing, strengthen the movement of the underfloor traveling wind, and the floor inside air e4 re attached so to the rear wall 66 once, as shown in FIG. 8, the floor traveling wind e3, e4, the rear wall of the recess 62 66 is effectively peeled downward at a portion extending below the vehicle, and the underfloor traveling winds e3 and e4 are prevented from flowing into the rear wheel house 61, and the underfloor outer wind e3 and the underfloor inner wind By focusing e4 on the outer side in the vehicle width direction of the rear wall 66 of the recess 62, it is configured to prevent outflow to the side surface of the vehicle body.

要するに、本来、床下走行風を流入させたくないリヤホイールハウス61前方の凹部62に、敢えて床下走行風e3,e4を集束させ、集束させることで床下走行風e3,e4の動きを強め、当該床下走行風e3,e4を、凹部62の後壁66が車両下方に延設された部位にて、効果的に下方へ剥離し、以て、床下走行風e3,e4がリヤホイールハウス61内に流入するのを抑制し、このような床下走行風の集束効果により、エッジが形成しにくいアンダカバー50であっても、当該床下走行風e3,e4を集束させて車両下方にガイドすることにより、確実に剥離させるよう構成したものである。
なお、図3においては床下内側風e4の流れを示す仮想線矢印は集束の程度を強調して図示している。
In short, the movement of the underfloor traveling winds e3 and e4 is strengthened by focusing the underfloor traveling winds e3 and e4 in the recess 62 in front of the rear wheel house 61 where the underfloor traveling wind is not desired to flow. The underfloor traveling winds e3 and e4 are effectively peeled downward at the portion where the rear wall 66 of the recess 62 extends downward from the vehicle, so that the underfloor traveling winds e3 and e4 enter the rear wheel house 61. By suppressing the inflow, and by focusing the underfloor traveling winds e3 and e4 and guiding them under the vehicle even if the undercover 50 is difficult to form an edge due to the convergence effect of the underfloor traveling wind, It is configured to ensure peeling.
In FIG. 3, the imaginary line arrows indicate the flow of the underfloor inner air e4 are shown to emphasize the degree of focusing.

ここで、図1、図2に示すように、アンダカバー50の前部には、前側のジャッキアップポイントとしてフロントホイールハウス90の後縁から後方に延びる側方前側凹部91と、側方前側凹部91と凹部62の間において、サイドシル10またはガーニッシュ11との間に溝形状を形成する側方後側凹部92が設けられており、両凹部91,92により、フロントホイールハウス90と凹部62間に延びる側方凹部を形成している。
なお溝形状は、サイドシル10との間に形成せずに、側方前側凹部と後側凹部のみで形成してもよい。これにより、フロントホイールハウス90や前輪1下部周辺の空気を床下走行風e5として凹部62に導くことができ、フロントホイールハウス90から車体側面に流出する走行風を削減できると共に、凹部62に発生する負圧領域npにより、フロントホイールハウス90からの床下走行風を凹部62に流入する他の床下走行風e3,e4に集束させることができるので、凹部62の後壁66に集束する床下走行風を更に強めることができる。
Here, as shown in FIGS. 1 and 2, the front portion of the under cover 50 includes a side front recess 91 extending rearward from the rear edge of the front wheel house 90 as a front jack-up point, and a side front recess. Between the front wheel house 90 and the concave portion 62, a side rear concave portion 92 is formed between the side sill 10 and the garnish 11 between the front wheel house 90 and the concave portion 62. An extending lateral recess is formed.
Incidentally, the groove shape is not formed between the side sill 10, may be formed only in the rear recess and side front recess. Thereby, the air around the front wheel house 90 and the lower part of the front wheel 1 can be guided to the recess 62 as the underfloor running wind e5, and the running wind flowing out from the front wheel house 90 to the side of the vehicle body can be reduced and generated in the recess 62. The negative pressure region np allows the underfloor traveling wind from the front wheel house 90 to be focused on the other underfloor traveling winds e3 and e4 flowing into the recess 62, so that the underfloor traveling wind that converges on the rear wall 66 of the recess 62 is generated. It can be further strengthened.

ところで、図3に示すように、アンダカバー50における後側部材52後部の車幅方向の過半部は、凹部62よりもさらに後方に延びるよう形成されており、これにより略平坦な下面(床面54参照)の拡大を図るように構成している。
このように略平坦な床面54が車両後方に拡大された部位の後端部には、剥離部80を設けている。
Meanwhile, as shown in FIG. 3, the majority portion of the rear member 52 the rear of the vehicle width direction of the under cover 50 is formed so as to extend further rearward than the recess 62, thereby, substantially flat lower surface (floor The surface 54 is configured to be enlarged.
A peeling portion 80 is provided at the rear end of the portion where the substantially flat floor surface 54 is enlarged rearward of the vehicle.

図2,図3,図5に示すように、上述の剥離部80は、ガイド面81と、このガイド面81の直下流に開口形成された開口部としてのスリット82と、補強用の連結部83とから形成されており、該スリット82および連結部83は車幅方向に一直線状に、かつ交互に並んで複数設けられている。
上述の剥離部80の車幅方向中間部には、図5に示すように、後部縦壁84を介して取付け片85が設けられており、予めタンク固定バンド23に取付けられたブラケット86の下端に、ボルト、ナット等の取付け部材87を用いて、上記取付け片85が取付けられている。
なお、図中、矢印Fは車両前方を示し、矢印Rは車両後方を示し、矢印UPは車両上方を示し、矢印OUTは車幅方向の外方を示す。
As shown in FIGS. 2, 3, and 5, the peeling portion 80 includes a guide surface 81, a slit 82 as an opening formed immediately downstream of the guide surface 81, and a connecting portion for reinforcement. 83 is formed from, the slit 82 and the connecting portion 83 in a straight line in the vehicle width direction, and provided with a plurality alternately arranged.
As shown in FIG. 5, an attachment piece 85 is provided on the intermediate portion of the peeling portion 80 in the vehicle width direction via a rear vertical wall 84, and the lower end of the bracket 86 attached to the tank fixing band 23 in advance. Further, the mounting piece 85 is mounted using mounting members 87 such as bolts and nuts.
In the figure, arrow F indicates the front of the vehicle, arrow R indicates the rear of the vehicle, arrow UP indicates the upper side of the vehicle, and arrow OUT indicates the outward in the vehicle width direction.

このように、上記実施例の自動車の下部整流構造は、車体下面のリヤホイールハウス61前方に凹部62が設けられた自動車の下部整流構造であって、上記凹部62は前壁64と後壁66とを備え、上記後壁66が車幅方向外側後方に延びると共に、車両下方に延設されたものである(図3,図8参照)。   As described above, the lower rectifying structure of the automobile of the above embodiment is a lower rectifying structure of the automobile in which the concave portion 62 is provided in front of the rear wheel house 61 on the lower surface of the vehicle body, and the concave portion 62 includes the front wall 64 and the rear wall 66. The rear wall 66 extends rearward and outward in the vehicle width direction, and extends downward from the vehicle (see FIGS. 3 and 8).

この構成によれば、本来、床下走行風を流入させたくないリヤホイールハウス61前方の凹部62に、敢えて床下走行風e3,e4を集束させ、集束させることで床下走行風の動きを強め、当該床下走行風e3,e4を、凹部62後壁66の車両下方に延設された部位にて、効果的に下方へ剥離し、以て、床下走行風e3,e4がリヤホイールハウス61内に流入するのを抑制することができる。このように、床下走行風の集束効果により、エッジが形成しにくい場合にあっても、当該床下走行風を集束させて車両下方にガイドすることで、確実に剥離させることができる。 According to this configuration, the underfloor traveling wind e3, e4 is intentionally focused on the recess 62 in front of the rear wheel house 61 where the underfloor traveling wind is not desired to flow, thereby strengthening the movement of the underfloor traveling wind, The underfloor traveling winds e3 and e4 are effectively peeled downward at the portion of the rear wall 66 of the recess 62 that extends below the vehicle, so that the underfloor traveling winds e3 and e4 enter the rear wheel house 61. Inflow can be suppressed. Thus, even when it is difficult to form an edge due to the convergence effect of the underfloor traveling wind, the underfloor traveling wind can be reliably peeled off by converging and guiding the vehicle under the vehicle.

この発明の一実施形態においては、上記凹部62の前壁64は上記後壁66の前方において車幅方向内側後方へ傾斜して延設され、上記前壁64の下面縁部に、床下風の剥離促進用のエッジ部71を有するガイド部72が設けられたものである(図3参照)。   In one embodiment of the present invention, the front wall 64 of the recess 62 extends obliquely inwardly in the vehicle width direction in front of the rear wall 66, and an underfloor wind is formed on the lower surface edge of the front wall 64. A guide portion 72 having an edge portion 71 for promoting peeling is provided (see FIG. 3).

この構成によれば、前壁64のガイド部72により余分な風e1を上記凹部62よりも車幅方向内側へ排除したうえで、凹部62と対応する位置で車両前方から車両後方へ流れる床下走行風e3,e4のうち車幅方向外側の風(床下外側風e3)が、上記ガイド部72のエッジ部71で剥離され、この剥離風と凹部62との間に負圧領域np(図7参照)が発生し、上記床下走行風e3,e4のうち車幅方向内側の風(床下内側風e4)を、負圧領域npに引込んで、凹部62の後66壁のうち車幅方向外側に床下外側風e3と床下内側風e4とを集束させる。   According to this configuration, the excess wind e1 is removed from the concave portion 62 to the inner side in the vehicle width direction by the guide portion 72 of the front wall 64 and then travels under the floor flowing from the front of the vehicle to the rear of the vehicle at a position corresponding to the concave portion 62. Of the winds e3 and e4, the wind outside the vehicle width direction (underfloor outside wind e3) is peeled off at the edge portion 71 of the guide portion 72, and a negative pressure region np (see FIG. 7) is provided between the peeling wind and the recess 62. ) Of the underfloor traveling winds e3 and e4, the wind on the inner side in the vehicle width direction (underfloor inner wind e4) is drawn into the negative pressure region np, and the floor 66 on the outer side in the vehicle width direction on the rear 66 wall of the recess 62 The outer wind e3 and the underfloor inner wind e4 are converged.

この集束により、床下走行風e3,e4の動きを強めることで、当該床下走行風e3,e4を、凹部62後壁66の車両下方に延設された部位にて、効果的に下方へ剥離して、床下走行風e3,e4がリヤホイールハウス61内に流入するのを抑制することができる。
また、上述の床下外側風e3と床下内側風e4とを凹部62後壁66の車幅方向外側に集束させることで、車体側面流が上記凹部62に流入するのを防止することができる。
By focusing the movement of the underfloor traveling winds e3 and e4, the underfloor traveling winds e3 and e4 are effectively peeled downward at the part of the rear wall 66 of the recess 62 that extends below the vehicle. Thus, the underfloor traveling winds e3 and e4 can be prevented from flowing into the rear wheel house 61.
Further, by focusing the underfloor outer wind e3 and the underfloor inner wind e4 on the outer side in the vehicle width direction of the rear wall 66 of the recess 62, it is possible to prevent the vehicle body side flow from flowing into the recess 62.

この発明の一実施形態においては、上記車体下面はフロアアンダカバー(アンダカバー50参照)で形成され、該フロアアンダカバー(アンダカバー50)の後壁66下端には車両後方に延びるフランジ部67が形成されたものである(図3,図8参照)。   In one embodiment of the present invention, the lower surface of the vehicle body is formed by a floor under cover (see the under cover 50), and a flange portion 67 extending rearward of the vehicle is formed at the lower end of the rear wall 66 of the floor under cover (under cover 50). It is formed (see FIGS. 3 and 8).

この構成によれば、上述のフランジ部67によるフロアアンダカバー(アンダカバー50)の凹部62後壁66の補強と、フランジ部67による床下走行風の剥離性確保との両立を図ることができる。   According to this configuration, it is possible to achieve both the reinforcement of the rear wall 66 of the recess 62 of the floor under cover (under cover 50) by the flange portion 67 and the separation of the underfloor traveling wind by the flange portion 67.

この発明の一実施形態においては、上記凹部62はジャッキアップポイント形成用の凹部であることを特徴とするものである。   In one embodiment of the present invention, the recess 62 is a recess for forming a jack-up point.

この構成によれば、上述の凹部62により自動車の製造時、メンテナンス時に必要なジャッキアップポイントを確保しつつ、該凹部62に床下走行風e3,e4を集束させて、その動きを強め、凹部62後壁66の車両下方に延設された部位にて、床下走行風e3,e4を効果的に下方へ剥離し、当該床下走行風e3,e4がリヤホイールハウス61内に流入するのを抑制することができる。 According to this configuration, the above-described recess 62 secures a jack-up point necessary for manufacturing and maintenance of the automobile, and focuses the underfloor traveling winds e3 and e4 on the recess 62 to strengthen the movement. 62 The underfloor traveling winds e3 and e4 are effectively peeled downward at a portion of the rear wall 66 extending below the vehicle, and the underfloor traveling winds e3 and e4 are prevented from flowing into the rear wheel house 61. can do.

この発明の構成と、上述の実施例との対応において、
この発明のフロアアンダカバーは、実施例のアンダカバー50(特に、後側部材52)に対応するも、
この発明は、上述の実施例の構成のみに限定されるものではない。
In the correspondence between the configuration of the present invention and the above-described embodiment,
The floor under cover of the present invention corresponds to the under cover 50 (particularly the rear member 52) of the embodiment.
The present invention is not limited to the configuration of the above-described embodiment.

例えば、車体下面はアンダカバー50のみに限定されるものではなく、フロアパネルやクロスメンバ等の車体構造の一部、または補機の一部により形成してもよい。さらに、床下部材の素材としては、不織布等の布状の繊維を有する素材に代えて、CFRPやGFRPなどの繊維強化プラスチックを採用してもよい。   For example, the lower surface of the vehicle body is not limited to the under cover 50 alone, and may be formed by a part of a vehicle body structure such as a floor panel or a cross member, or a part of an auxiliary machine. Further, as the material for the underfloor member, a fiber reinforced plastic such as CFRP or GFRP may be employed instead of a material having cloth-like fibers such as a nonwoven fabric.

以上説明したように、本発明は、車体下面のリヤホイールハウス前方に凹部が設けられた自動車の下部整流構造について有用である。   As described above, the present invention is useful for the lower rectification structure of an automobile in which a recess is provided in front of the rear wheel house on the lower surface of the vehicle body.

10…サイドシル
50…アンダカバー(フロアアンダカバー)
61…リヤホイールハウス
62…凹部
64…前壁
66…後壁
67…フランジ部
71…エッジ部
72…ガイド部
75…デフレクタ
90…フロントホイールハウス
91…側方凹部
92…側方前側凹部
10 ... Side sill 50 ... Undercover (floor undercover)
61 ... Rear wheel house 62 ... Recess 64 ... Front wall 66 ... Rear wall 67 ... Flange portion 71 ... Edge portion 72 ... Guide portion 75 ... Deflector 90 ... Front wheel house 91 ... Side recess 92 ... Side front recess

Claims (4)

車体下面のリヤホイールハウス前方に凹部が設けられた自動車の下部整流構造であって、
上記凹部は前壁と後壁とを備え、
上記後壁が車幅方向外側後方に延びると共に、車両下方に延設され、かつ上記凹部の後壁が上記リヤホイールハウスの車幅方向外側端よりも車幅方向内側に離間して設けられ
上記凹部の前壁は上記後壁の前方において車幅方向内側後方へ傾斜して延設され、
上記前壁の下面縁部に、床下風の剥離促進用のエッジ部を有するガイド部が設けられた
自動車の下部整流構造。
A lower rectification structure for an automobile in which a recess is provided in front of the rear wheel house on the lower surface of the vehicle body,
The recess includes a front wall and a rear wall,
The rear wall extends rearward in the vehicle width direction, and extends downward in the vehicle, and the rear wall of the recess is provided inwardly in the vehicle width direction from the vehicle width direction outer end of the rear wheel house ,
The front wall of the recess is inclined and extended inward in the vehicle width direction in front of the rear wall,
A lower rectifying structure for an automobile, wherein a guide portion having an edge portion for promoting separation of underfloor wind is provided on a lower surface edge portion of the front wall .
上記車体下面は、フロントホイールハウス後縁から上記凹部までサイドシルに沿って後方に延びる側方凹部が設けられる一方、
上記サイドシルの後端に設けられたデフレクタが、上記凹部の後壁よりも車幅方向外側に延設された
請求項に記載の自動車の下部整流構造。
While the vehicle body lower surface is provided with a side recess extending rearward along the side sill from the rear edge of the front wheel house to the recess,
The lower rectifying structure for an automobile according to claim 1 , wherein a deflector provided at a rear end of the side sill extends outward in the vehicle width direction from the rear wall of the recess.
上記車体下面はフロアアンダカバーで形成され、
該フロアアンダカバーの後壁下端には車両後方に延びるフランジ部が形成された
請求項1に記載の自動車の下部整流構造。
The lower surface of the vehicle body is formed with a floor under cover,
The lower rectifying structure for an automobile according to claim 1, wherein a flange portion extending rearward of the vehicle is formed at a lower end of a rear wall of the floor under cover.
車体下面のリヤホイールハウス前方に凹部が設けられた自動車の下部整流構造であって、
上記凹部は前壁と後壁とを備え、
上記後壁が車幅方向外側後方に延びると共に、車両下方に延設され、かつ上記凹部の後壁が上記リヤホイールハウスの車幅方向外側端よりも車幅方向内側に離間して設けられ、
上記凹部はジャッキアップポイント形成用の凹部であることを特徴とする
自動車の下部整流構造。
A lower rectification structure for an automobile in which a recess is provided in front of the rear wheel house on the lower surface of the vehicle body,
The recess includes a front wall and a rear wall,
The rear wall extends rearward in the vehicle width direction, and extends downward in the vehicle, and the rear wall of the recess is provided inwardly in the vehicle width direction from the vehicle width direction outer end of the rear wheel house,
A lower rectifying structure for an automobile, wherein the recess is a recess for forming a jack-up point.
JP2016161782A 2016-08-22 2016-08-22 Lower rectification structure of automobile Expired - Fee Related JP6477632B2 (en)

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Application Number Priority Date Filing Date Title
JP2016161782A JP6477632B2 (en) 2016-08-22 2016-08-22 Lower rectification structure of automobile

Publications (2)

Publication Number Publication Date
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JP7230770B2 (en) * 2019-10-16 2023-03-01 マツダ株式会社 vehicle body structure
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