JP2002347664A - Underfloor structure of vehicle - Google Patents
Underfloor structure of vehicleInfo
- Publication number
- JP2002347664A JP2002347664A JP2001159290A JP2001159290A JP2002347664A JP 2002347664 A JP2002347664 A JP 2002347664A JP 2001159290 A JP2001159290 A JP 2001159290A JP 2001159290 A JP2001159290 A JP 2001159290A JP 2002347664 A JP2002347664 A JP 2002347664A
- Authority
- JP
- Japan
- Prior art keywords
- vehicle
- muffler
- differential device
- floor
- rear side
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、車両の床下部に
おける空気流れによりデファレンシャルギアを冷却する
車両の床下構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle underfloor structure for cooling a differential gear by an air flow in a vehicle underfloor portion.
【０００２】[0002]
【従来の技術】後輪が駆動輪となっている車両におい
て、車両床下部における車両前方側に配置されたトラン
スミッションに連結されるプロペラシャフトの後端に
は、デファレンシャル装置が連結される。このデファレ
ンシャル装置を冷却するための床下構造として、例えば
特開平１１−１１３６０号公報に記載されたものがあ
る。2. Description of the Related Art In a vehicle having rear wheels as driving wheels, a differential device is connected to a rear end of a propeller shaft connected to a transmission disposed on a vehicle front side under a vehicle floor. As an underfloor structure for cooling the differential device, for example, there is one described in Japanese Patent Application Laid-Open No. 11-11360.
【０００３】この公報記載のものは、デファレンシャル
装置の車両前方側に、クロスメンバに固定した導風板を
配置している。導風板は、車両前端部がＲ形状を呈し、
下面に沿って流れる空気が、後方の上方誘導面に誘導さ
れてデファレンシャル装置に案内されるようになってい
る。In this publication, a wind guide plate fixed to a cross member is disposed on the vehicle front side of a differential device. The wind guide plate has an R shape at the front end of the vehicle,
The air flowing along the lower surface is guided to the rear upper guiding surface and guided to the differential device.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記し
た従来構造では、デファレンシャル装置を冷却するため
の専用の冷却部品、すなわち導風板を必要としているの
で、部品点数が増加して車両の組立工数が増大するとと
もに、床下構造が複雑なり、床下部での空気流れを乱す
ものとなる。However, the above-mentioned conventional structure requires a dedicated cooling component for cooling the differential device, that is, a baffle plate, so that the number of components is increased and the man-hour for assembling the vehicle is reduced. As it increases, the underfloor structure becomes more complex and disrupts airflow under the floor.
【０００５】そこで、この発明は、専用の冷却部品を用
いることなく、デファレンシャル装置を効果的に冷却で
きるようにすることを目的としている。Accordingly, an object of the present invention is to enable a differential device to be effectively cooled without using a dedicated cooling component.
【０００６】[0006]
【課題を解決するための手段】前記目的を達成するため
に、請求項１の発明は、車両後部のフロア下方にデファ
レンシャル装置が配置され、デファレンシャル装置の車
両前方側に、上面に空気流れ空間を有する消音器が配置
された車両の床下構造において、前記消音器の車両後方
側の端部上面の少なくとも一部を、前記デファレンシャ
ル装置の下端面より下方に配置した構成としてある。In order to achieve the above object, according to the present invention, a differential device is disposed below a floor at a rear portion of a vehicle, and an air flow space is provided on an upper surface of the differential device on a front side of the vehicle. In the underfloor structure of the vehicle in which the muffler is provided, at least a part of the upper surface of the end portion on the vehicle rear side of the muffler is arranged below the lower end surface of the differential device.
【０００７】請求項２の発明は、請求項１の発明の構成
において、デファレンシャル装置の下端面は、前記デフ
ァレンシャル装置の車両後方に配置されたスペアタイヤ
収容部の下端面より下方に配置されている構成としてあ
る。According to a second aspect of the present invention, in the configuration of the first aspect, a lower end surface of the differential device is disposed below a lower end surface of a spare tire accommodating portion disposed behind the differential device in a vehicle. There is a configuration.
【０００８】請求項３の発明は、請求項１または２の発
明の構成において、前記消音器は、この消音器の下面
が、消音器の左右に位置する車両床下面とほぼ同一面内
となるよう配置されている構成としてある。According to a third aspect of the present invention, in the configuration of the first or second aspect of the present invention, the lower surface of the muffler is substantially in the same plane as the lower surface of the vehicle floor located on the left and right sides of the muffler. It is configured as such.
【０００９】請求項４の発明は、請求項１ないし３のい
ずれかの発明の構成において、前記消音器の車幅方向ほ
ぼ中央位置の上面に、車両前後方向に延長される凹部を
形成し、この凹部における車両後方側の端部上面をデフ
ァレンシャル装置の下端面より下方に配置した構成とし
てある。According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, a concave portion extending in the vehicle front-rear direction is formed on an upper surface of the muffler at a substantially central position in a vehicle width direction, The upper surface of the end portion on the vehicle rear side in this concave portion is arranged below the lower end surface of the differential device.
【００１０】請求項５の発明は、請求項４の発明の構成
において、前記凹部は、車両後方側ほどその上面が下方
に位置するよう傾斜している構成としてある。According to a fifth aspect of the present invention, in the configuration of the fourth aspect of the present invention, the concave portion is inclined such that the upper surface thereof is positioned lower toward the rear of the vehicle.
【００１１】請求項６の発明は、請求項１ないし５のい
ずれかの発明の構成において、前記消音器の車両後方側
の端部は、デファレンシャル装置の車両前方側の端部直
前に位置している構成としてある。According to a sixth aspect of the present invention, in the configuration according to any one of the first to fifth aspects, the end of the muffler on the vehicle rear side is located immediately before the end of the differential device on the vehicle front side. There is a configuration.
【００１２】請求項７の発明は、請求項１ないし６のい
ずれかの発明の構成において、前記消音器の車両前方側
に配置したトランスミッションの車両後方側の下端面
を、車両後方側ほど上方となるよう傾斜させた構成とし
てある。According to a seventh aspect of the present invention, in the configuration of any one of the first to sixth aspects of the present invention, the lower end surface of the transmission arranged on the vehicle front side of the muffler on the vehicle rear side is set so as to be higher toward the vehicle rear side. The configuration is such that it is inclined.
【００１３】請求項８の発明は、請求項２の発明の構成
において、前記スペアタイヤ収容部の下端面は、車両後
方側ほど上方となるよう傾斜させた構成としてある。According to an eighth aspect of the present invention, in the configuration of the second aspect of the present invention, the lower end surface of the spare tire accommodating portion is inclined such that the lower end surface thereof becomes higher toward the rear side of the vehicle.
【００１４】請求項９の発明は、請求項１ないし８のい
ずれかの発明の構成において、前記消音器上面の空気流
れ空間は、デファレンシャル装置とトランスミッション
とを連結するプロペラシャフトが収容される床下凹部と
の間に形成されている構成としてある。According to a ninth aspect of the present invention, in the configuration of any one of the first to eighth aspects of the present invention, the air flow space on the upper surface of the muffler has a recess under the floor in which a propeller shaft connecting the differential device and the transmission is accommodated. This is a configuration formed between
【００１５】[0015]
【発明の効果】請求項１の発明によれば、消音器上面の
空気流れ空間を流れる空気流は、消音器の車両後方側の
端部上面の少なくとも一部からデファレンシャル装置の
下端面にスムーズに案内されるので、デファレンシャル
装置を効果的に冷却できるとともに、デファレンシャル
装置の車両前方側での空気流の乱れが抑制され、車両床
下部における空気流の整流効果が向上する。According to the first aspect of the present invention, the airflow flowing in the airflow space on the upper surface of the muffler smoothly flows from at least a portion of the upper surface of the rear end of the muffler to the lower end surface of the differential device. Since the differential device is guided, the differential device can be effectively cooled, and the turbulence of the air flow on the vehicle front side of the differential device is suppressed, and the rectifying effect of the air flow in the lower part of the vehicle floor is improved.
【００１６】請求項２の発明によれば、消音器上面の空
気流れ空間を流れる空気流は、消音器の車両後方側の端
部上面からデファレンシャル装置の下端面を経て、スペ
アタイヤ収容部の下端面にスムーズに案内されるので、
デファレンシャル装置の冷却効果および車両床下部にお
ける空気流の整流効果を向上させることができる。According to the second aspect of the present invention, the airflow flowing through the airflow space on the upper surface of the muffler passes from the upper surface of the rear end of the muffler through the lower end surface of the differential device to the lower part of the spare tire accommodating portion. As it is guided smoothly to the end face,
It is possible to improve the cooling effect of the differential device and the rectification effect of the airflow in the lower part of the vehicle floor.
【００１７】請求項３の発明によれば、消音器の下面
を、消音器の左右に位置する車両床下面内となるよう配
置することで、車両床下部における空気流の整流効果を
向上させることができる。According to the third aspect of the present invention, by arranging the lower surface of the muffler so as to be inside the lower surface of the vehicle floor located on the left and right of the muffler, the air flow rectification effect in the lower part of the vehicle floor is improved. Can be.
【００１８】請求項４の発明によれば、消音器の上面に
形成した凹部に沿って空気流が流れることで、空気流速
が高まるとともに、デファレンシャル装置に効率よく冷
却空気が案内されるので、デファレンシャル装置の冷却
効果が向上するとともに、整流効果も向上する。また、
消音器は、凹部を有することで、補強部材を別途設ける
ことなく、剛性を高めることができる。According to the fourth aspect of the present invention, since the air flow flows along the concave portion formed on the upper surface of the muffler, the air flow velocity increases, and the cooling air is efficiently guided to the differential device. The cooling effect of the device is improved, and the rectification effect is also improved. Also,
Since the silencer has the concave portion, the rigidity can be increased without separately providing a reinforcing member.
【００１９】請求項５の発明によれば、車両後方側ほど
その上面が下方に位置するよう傾斜している凹部を流れ
る空気を、デファレンシャル装置に効率よく案内するこ
とができる。According to the fifth aspect of the present invention, the air flowing through the concave portion inclined so that the upper surface thereof is positioned lower toward the rear of the vehicle can be efficiently guided to the differential device.
【００２０】請求項６の発明によれば、消音器上面の空
気流れ空間から車両後方へ向けて流出する空気流を、デ
ファレンシャル装置に確実に案内することができる。According to the sixth aspect of the present invention, the airflow flowing out of the airflow space on the upper surface of the muffler toward the rear of the vehicle can be reliably guided to the differential device.
【００２１】請求項７の発明によれば、トランスミッシ
ョン下面を流れる空気流を、その後端の傾斜面により消
音器の上面に導くことができ、デファレンシャル装置に
対する冷却効果をより向上させることができるととも
に、消音器の上下における空気流の整流効果も向上させ
ることができる。According to the seventh aspect of the present invention, the air flow flowing through the lower surface of the transmission can be guided to the upper surface of the muffler by the inclined surface at the rear end, and the cooling effect on the differential device can be further improved. The rectification effect of the air flow above and below the silencer can also be improved.
【００２２】請求項８の発明によれば、ペアタイヤ収容
部の下端面の傾斜に沿って流れる空気は、流速が高ま
り、車両床下部における空気流の整流効果がさらに向上
する。また、スペアタイヤ収容部の下端面における空気
流速が高まることで、車両後端における空気流による下
方へのダウンフォースも確保することができる。According to the eighth aspect of the present invention, the air flowing along the slope of the lower end face of the paired tire accommodating portion has an increased flow velocity, and the rectifying effect of the air flow in the lower part of the vehicle floor is further improved. In addition, by increasing the air flow velocity at the lower end surface of the spare tire accommodating portion, it is possible to secure a downward force due to the air flow at the rear end of the vehicle.
【００２３】請求項９の発明によれば、プロペラシャフ
トが収容される床下凹部と消音器上面との間の空気流れ
空間を流れる空気を、デファレンシャル装置に向けて効
率よく案内することができる。According to the ninth aspect of the present invention, the air flowing in the air flow space between the underfloor recess in which the propeller shaft is accommodated and the upper surface of the muffler can be efficiently guided toward the differential device.
【００２４】[0024]
【発明の実施の形態】以下、この発明の実施の形態を図
面に基づき説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００２５】図１は、この発明の実施の一形態に係わる
車両の床下構造を示す車幅方向中央位置での側面断面図
で、図２は、図１の床下構造を備えた車両の床下面を示
す底面図である。また、図３は、図２のＡ−Ａ断面図、
図４は図２のＢ−Ｂ断面図、図５は図２のＣ−Ｃ断面図
である。FIG. 1 is a side sectional view showing a vehicle under-floor structure according to an embodiment of the present invention at a center position in a vehicle width direction. FIG. 2 is a bottom view of a vehicle having the vehicle under-floor structure of FIG. FIG. FIG. 3 is a sectional view taken along line AA of FIG.
4 is a sectional view taken along line BB of FIG. 2, and FIG. 5 is a sectional view taken along line CC of FIG.
【００２６】フロアパネル１の路面に対向する車両床下
面３および、フロアパネル１の車両前後方向ほぼ中央よ
りやや後方位置のフロアパネル１の下部に配置された燃
料タンク５の路面に対向する車両床下面７には、図３〜
図５に示すように、車幅方向中央に床下凹部としてのフ
ロアトンネル９が形成され、このフロアトンネル９内に
はプロペラシャフト１１が収容されている。A vehicle floor lower surface 3 facing the road surface of the floor panel 1 and a vehicle floor facing a road surface of the fuel tank 5 disposed below the floor panel 1 slightly behind the center of the floor panel 1 in the vehicle longitudinal direction. 3 to 3
As shown in FIG. 5, a floor tunnel 9 as a recess under the floor is formed at the center in the vehicle width direction, and a propeller shaft 11 is accommodated in the floor tunnel 9.
【００２７】プロペラシャフト１１の図１および図２中
で矢印ＦＲで示す車両前方側の端部には、トランスミッ
ション１３が連結されるとともに、車両後方側の端部に
は、デファレンシャル装置１５が連結されている。トラ
ンスミッション１３における下部のオイルパン１４の車
両後方側の下端面は、車両後方側ほど上方となるよう傾
斜する傾斜面１４ａとなっている。A transmission 13 is connected to an end of the propeller shaft 11 on the front side of the vehicle indicated by an arrow FR in FIGS. 1 and 2, and a differential device 15 is connected to an end of the propeller shaft 11 on the rear side of the vehicle. ing. The lower end surface of the lower oil pan 14 of the transmission 13 on the vehicle rear side is an inclined surface 14a that is inclined so as to be more upward toward the vehicle rear side.
【００２８】デファレンシャル装置１５の車両前方側の
プロペラシャフト１１の下方のフロアトンネル９内に
は、消音器としてのサブマフラ１７が配置されている。
このサブマフラ１７とフロアトンメル９との間が空気流
れ空間１８となる。サブマフラ１７の下面は、図３〜図
５に示すように、サブマフラ１７の左右に位置する車両
床下面３および７とほぼ同一面内となるよう配置されて
いる。また、サブマフラ１７の車両後方側の端部は、デ
ファレンシャル装置１５の車両前方側の端部直前に位置
している。In the floor tunnel 9 below the propeller shaft 11 on the vehicle front side of the differential device 15, a sub-muffler 17 as a muffler is arranged.
The space between the sub-muffler 17 and the floor tommel 9 is an air flow space 18. As shown in FIGS. 3 to 5, the lower surface of the sub muffler 17 is disposed so as to be substantially in the same plane as the vehicle floor lower surfaces 3 and 7 located on the left and right of the sub muffler 17. The rear end of the sub-muffler 17 is located immediately before the front end of the differential device 15 on the vehicle.
【００２９】図６は、サブマフラ１７の斜視図である。
サブマフラ１７の車両前方側の端部には図示しないエン
ジンに連結される２本のフロントチューブ１９が連結管
２０を介して接続されるとともに、車両後方側の端部に
は、メインマフラ２１に接続されるリアチューブ２３が
接続されている。FIG. 6 is a perspective view of the sub-muffler 17.
Two front tubes 19 connected to an engine (not shown) are connected to an end of the sub-muffler 17 on the vehicle front side via a connection pipe 20, and a main muffler 21 is connected to an end on the vehicle rear side. The rear tube 23 is connected.
【００３０】サブマフラ１７の上面には、車幅方向の中
央位置に、車両前後方向に延長される凹部としての断面
円弧状の空気案内凹部２５が形成されてい る。空気案
内凹部２５は、エンボス加工によって形成され、車両前
方から後方に向けて、徐々に大きくなっている。すなわ
ち、空気案内凹部２５は、車両前方から後方に向けて、
車幅方向の寸法が徐々に大きくなるとともに、深さも徐
々に大きく形成され、車両後方側の端部上面２５ａは、
デファレンシャル装置１５の下端面より寸法Ｌだけ下方
に位置している。On the upper surface of the sub-muffler 17, an air guide recess 25 having a circular arc cross section is formed at a center position in the vehicle width direction as a recess extending in the vehicle front-rear direction. The air guide recess 25 is formed by embossing, and gradually increases from the front to the rear of the vehicle. That is, the air guide recess 25 extends from the front to the rear of the vehicle,
As the dimension in the vehicle width direction gradually increases, the depth is also gradually increased, and the end upper surface 25a on the vehicle rear side is
It is located below the lower end surface of the differential device 15 by the dimension L.
【００３１】デファレンシャル装置１５の車両後方側に
は、図示しないスペアタイヤが収容されるスペアタイヤ
収容部としてのスペアパン２７が設けられている。この
スペアパン２７は、下端面が車両後方側ほど上方となる
よう傾斜する傾斜面２７ａを有し、その車両前方側の最
下端位置は、サブマフラ１７の車両後方側の端部上面２
５ａより寸法Ｍ（Ｍ＞Ｌ）だけ上方に位置している。す
なわち、デファレンシャル装置１５の下端面は、スペア
パン２７の下端面より下方に位置している。A spare pan 27 as a spare tire accommodating portion for accommodating a spare tire (not shown) is provided on the vehicle rear side of the differential device 15. The spare pan 27 has an inclined surface 27a that is inclined so that the lower end surface is higher toward the rear side of the vehicle.
5a is located above dimension M (M> L). That is, the lower end surface of the differential device 15 is located lower than the lower end surface of the spare pan 27.
【００３２】図７は、サブマフラ１７の内部構造を示す
もので、車両前後方向に沿って３枚のバッフル２９，３
１，３３が収容固定されている。フロントチューブ１９
に接続される連結管２０は、サブマフラ１７の空気案内
凹部２５に対応する車幅方向中央位置にて、２枚のバッ
フル２９，３１をそれぞれ貫通し、バッフル３１，３３
相互間のスペースに開口している。一方リアチューブ２
３は、空気案内凹部２５の側方位置にて、最後部のバッ
フル３３を貫通し、バッフル３１，３３相互間のスペー
スに開口している。FIG. 7 shows the internal structure of the sub-muffler 17, in which three baffles 29, 3 are arranged along the longitudinal direction of the vehicle.
1, 33 are accommodated and fixed. Front tube 19
The connection pipe 20 penetrates through the two baffles 29, 31 at the center position in the vehicle width direction corresponding to the air guide recess 25 of the sub-muffler 17, and the baffles 31, 33
Open to the space between each other. On the other hand, rear tube 2
Numeral 3 penetrates the rearmost baffle 33 at the side position of the air guide recess 25 and opens to the space between the baffles 31, 33.
【００３３】次に作用を説明する。車両走行時、車両前
方から車両の床下に流入する空気は、その一部が図１中
で矢印Ｄで示すように、トランスミッション１３におけ
るオイルパン１４の車両後方側の下端面に形成した傾斜
面１３ａに案内され、フロアトンネル９内に流入し、サ
ブマフラ１７とフロアトンネル９との間の空気流れ空間
１８に入り込む。Next, the operation will be described. When the vehicle travels, the air flowing into the vehicle under the floor from the front of the vehicle is partially inclined by an inclined surface 13a formed on the lower end surface of the oil pan 14 in the transmission 13 on the vehicle rear side as shown by an arrow D in FIG. And flows into the floor tunnel 9 and enters the air flow space 18 between the sub-muffler 17 and the floor tunnel 9.
【００３４】空気流れ空間１８に流入した空気は、サブ
マフラ１７の上面に形成した空気案内凹部２５に案内さ
れて、その後方のデファレンシャル装置１５側に流出す
る。このとき、空気案内凹部２５の車両後方側の端部上
面２５ａは、デファレンシャル装置１５の下端面より寸
法Ｌだけ下方に位置し、またサブマフラ１７の車両後方
側の端部は、デファレンシャル装置１５の車両前方側の
端部直前に位置しているので、空気案内凹部２５から流
出した空気は、デファレンシャル装置１５の下端面を後
方に向けてスムーズに流れ、さらにその後方でかつ上方
位置にあるスペアパン２７の下端面の傾斜面２７ａに沿
って車両後方に向けてスムーズに流出する。The air that has flowed into the air flow space 18 is guided by an air guide recess 25 formed on the upper surface of the sub-muffler 17 and flows out toward the differential device 15 behind. At this time, the upper surface 25a on the vehicle rear side of the air guide recess 25 is located below the lower end surface of the differential device 15 by the dimension L, and the rear end of the sub-muffler 17 is located on the vehicle side of the differential device 15. Since it is located just before the front end, the air that has flowed out of the air guide recess 25 flows smoothly backward through the lower end surface of the differential device 15, and further flows into the spare pan 27 located behind and above the differential pan 15. It flows smoothly toward the rear of the vehicle along the inclined surface 27a at the lower end surface.
【００３５】これにより、デファレンシャル装置１５を
効果的に冷却できるとともに、デファレンシャル装置１
５前方での空気流の乱れが抑制され、車両における床下
部の空気流の整流効果が向上する。また、空気が空気案
内凹部２５を流れることで流速が高まるとともに、デフ
ァレンシャル装置１５に効率よく冷却空気が案内される
ので、デファレンシャル装置１５の冷却効果がさらに向
上するとともに、整流効果も向上する。さらに、サブマ
フラ１５は、空気案内凹部２５をエンボス加工によって
形成することで、補強部材を別途設けることなく、剛性
を高めることができる。Thus, the differential device 15 can be effectively cooled and the differential device 1 can be effectively cooled.
5 The turbulence of the airflow ahead is suppressed, and the rectification effect of the airflow below the floor in the vehicle is improved. In addition, since the air flows through the air guide recess 25 to increase the flow velocity and efficiently guide the cooling air to the differential device 15, the cooling effect of the differential device 15 is further improved, and the rectification effect is also improved. Further, by forming the air guide recess 25 by embossing, the rigidity of the sub muffler 15 can be increased without separately providing a reinforcing member.
【００３６】また、トランスミッション１３におけるオ
イルパン１４の車両後方側の下端面が傾斜面１４ａとな
っているので、サブマフラ１７の上面に流入する空気量
が増大し、デファレンシャル装置に対する冷却効果がよ
り向上するとともに、サブマフラ１７の上下における空
気流の整流効果も向上する。Since the lower end surface of the oil pan 14 in the transmission 13 on the vehicle rear side is the inclined surface 14a, the amount of air flowing into the upper surface of the sub-muffler 17 is increased, and the cooling effect on the differential device is further improved. At the same time, the rectification effect of the air flow above and below the sub-muffler 17 is also improved.
【００３７】また、スペアパン２７の下端面は、傾斜面
２７ａとなっていることから、車両前後方向の距離が水
平面とする場合に比べて長くなり、この結果傾斜面２７
ａに沿う空気の流速が高まり、床下部における空気流の
整流効果が向上する。さらに、傾斜面２７ａに沿う空気
流速が高まることで、車両後端の下方へのダウンフォー
スも確保することができる。Further, since the lower end surface of the spare pan 27 is an inclined surface 27a, the distance in the vehicle front-rear direction is longer than that in the case of a horizontal plane.
The flow velocity of the air along a is increased, and the rectifying effect of the air flow in the lower part of the floor is improved. Further, by increasing the air flow velocity along the inclined surface 27a, it is possible to secure a downforce downward of the rear end of the vehicle.
【００３８】さらに、サブマフラ１７の下面を、フロア
パネル３および燃料タンク５の各車両床下面３および７
とほぼ同一面とすることで、車両床下部における空気流
の整流効果を向上させることができる。Further, the lower surface of the sub muffler 17 is fixed to the vehicle panel lower surfaces 3 and 7 of the floor panel 3 and the fuel tank 5.
By making the plane substantially the same as that described above, it is possible to improve the rectifying effect of the airflow in the lower part of the vehicle floor.
【図１】この発明の実施の一形態に係わる車両の床下構
造を示す車幅方向中央位置での側面断面図である。FIG. 1 is a side cross-sectional view showing a structure under a floor of a vehicle according to an embodiment of the present invention at a center position in a vehicle width direction.
【図２】図１の床下構造を備えた車両の床下面を示す底
面図である。FIG. 2 is a bottom view showing the lower surface of the floor of the vehicle having the underfloor structure of FIG. 1;
【図３】図２のＡ−Ａ断面図である。FIG. 3 is a sectional view taken along line AA of FIG. 2;
【図４】図２のＢ−Ｂ断面図である。FIG. 4 is a sectional view taken along line BB of FIG. 2;
【図５】図２のＣ−Ｃ断面図である。FIG. 5 is a sectional view taken along line CC of FIG. 2;
【図６】図１の床下構造に使用されるサブマフラの斜視
図である。FIG. 6 is a perspective view of a sub-muffler used in the underfloor structure of FIG. 1;
【図７】図６のサブマフラの内部構造図である。FIG. 7 is an internal structure diagram of the sub-muffler of FIG. 6;
３，７ 車両床下面 ９ フロアトンネル（床下凹部） １１ プロペラシャフト １３ トランスミッション １４ａ 傾斜面 １５ デファレンシャル装置 １７ サブマフラ（消音器） １８ 空気流れ空間 ２５ 空気案内凹部（凹部） ２５ａ 端部上面 ２７ スペアパン（スペアタイヤ収容部） ２７ａ 傾斜面 3,7 Vehicle floor lower surface 9 Floor tunnel (underfloor recess) 11 Propeller shaft 13 Transmission 14a Inclined surface 15 Differential device 17 Sub-muffler (muffler) 18 Air flow space 25 Air guide recess (recess) 25a End upper surface 27 Spare pan (spare tire) Housing section) 27a Inclined surface
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ６２Ｄ 35/00 Ｂ６２Ｄ 35/00 Ｚ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) B62D 35/00 B62D 35/00 Z
Claims (9)
ル装置が配置され、デファレンシャル装置の車両前方側
に、上面に空気流れ空間を有する消音器が配置された車
両の床下構造において、前記消音器の車両後方側の端部
上面の少なくとも一部を、前記デファレンシャル装置の
下端面より下方に配置したことを特徴とする車両の床下
構造。An under-floor structure of a vehicle in which a differential device is disposed below a floor at a rear portion of a vehicle, and a muffler having an air flow space on an upper surface is provided on a front side of the differential device with respect to the vehicle. The underfloor structure of a vehicle, wherein at least a part of the upper surface of the side end portion is disposed below the lower end surface of the differential device.
前記デファレンシャル装置の車両後方に配置されたスペ
アタイヤ収容部の下端面より下方に配置されていること
を特徴とする請求項１記載の車両の床下構造。2. A lower end surface of the differential device,
2. The underfloor structure of a vehicle according to claim 1, wherein the underfloor structure is disposed below a lower end surface of a spare tire accommodating portion disposed behind the vehicle of the differential device.
音器の左右に位置する車両床下面とほぼ同一面内となる
よう配置されていることを特徴とする請求項１または２
記載の車両の床下構造。3. The muffler according to claim 1, wherein the lower surface of the muffler is disposed so as to be substantially in the same plane as the lower surface of the vehicle floor located on the left and right sides of the muffler.
The underfloor structure of the vehicle as described.
面に、車両前後方向に延長される凹部を形成し、この凹
部における車両後方側の端部上面をデファレンシャル装
置の下端面より下方に配置したことを特徴とする請求項
１ないし３のいずれかに記載の車両の床下構造。4. A concave portion extending in the vehicle front-rear direction is formed on an upper surface of the muffler substantially at a center position in a vehicle width direction, and an upper surface of an end portion of the concave portion on a vehicle rear side is lower than a lower end surface of the differential device. The underfloor structure of a vehicle according to any one of claims 1 to 3, wherein the underfloor structure is arranged.
下方に位置するよう傾斜していることを特徴とする請求
項４記載の車両の床下構造。5. The underfloor structure of a vehicle according to claim 4, wherein said concave portion is inclined such that the upper surface thereof is positioned lower toward the rear side of the vehicle.
ァレンシャル装置の車両前方側の端部直前に位置してい
ることを特徴とする請求項１ないし５のいずれかに記載
の車両の床下構造。6. The vehicle according to claim 1, wherein an end of the muffler on the vehicle rear side is located immediately before an end of the differential device on the vehicle front side. Underfloor structure.
ンスミッションの車両後方側の下端面を、車両後方側ほ
ど上方となるよう傾斜させたことを特徴とする請求項１
ないし６のいずれかに記載の車両の床下構造。7. The vehicle according to claim 1, wherein a lower end surface of a transmission disposed on a vehicle front side of the muffler on a vehicle rear side is inclined upward toward a vehicle rear side.
7. The under-floor structure of a vehicle according to any one of items 6 to 6.
両後方側ほど上方となるよう傾斜させたことを特徴とす
る請求項２記載の車両の床下構造。8. The underfloor structure of a vehicle according to claim 2, wherein a lower end surface of the spare tire accommodating portion is inclined so as to be higher toward a rear side of the vehicle.
ァレンシャル装置とトランスミッションとを連結するプ
ロペラシャフトが収容される床下凹部との間に形成され
ていることを特徴とする請求項１ないし８のいずれかに
記載の車両の床下構造。9. The air flow space on the upper surface of the muffler is formed between a recess under the floor where a propeller shaft connecting a differential device and a transmission is housed. The underfloor structure of the vehicle according to any one of the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001159290A JP3912037B2 (en) | 2001-05-28 | 2001-05-28 | Underfloor structure of vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001159290A JP3912037B2 (en) | 2001-05-28 | 2001-05-28 | Underfloor structure of vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002347664A true JP2002347664A (en) | 2002-12-04 |
| JP3912037B2 JP3912037B2 (en) | 2007-05-09 |
Family
ID=19002901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001159290A Expired - Fee Related JP3912037B2 (en) | 2001-05-28 | 2001-05-28 | Underfloor structure of vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3912037B2 (en) |
Cited By (7)
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|---|---|---|---|---|
| JP2006298235A (en) * | 2005-04-22 | 2006-11-02 | Mazda Motor Corp | Mounting structure of seat for vehicle |
| JP2008254682A (en) * | 2007-04-09 | 2008-10-23 | Suzuki Motor Corp | Exhaust device for vehicle |
| EP2942121A1 (en) | 2014-05-08 | 2015-11-11 | Toyota Jidosha Kabushiki Kaisha | Sub-muffler and manufacturing method of sub-muffler |
| EP2942122A1 (en) | 2014-05-08 | 2015-11-11 | Toyota Jidosha Kabushiki Kaisha | Sub-muffler and manufacturing method of sub-muffler |
| DE102016122287A1 (en) | 2016-11-21 | 2018-05-24 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Aerodynamically acting rear silencer for a motor vehicle |
| DE202016009175U1 (en) | 2016-11-21 | 2023-06-23 | Dr. Ing. h.c. F. Porsche Aktiengesellschaft | Aerodynamic rear silencer for a motor vehicle |
| DE202016009174U1 (en) | 2016-11-21 | 2023-06-23 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Aerodynamic rear silencer for a motor vehicle |
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| DE102016122287A1 (en) | 2016-11-21 | 2018-05-24 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Aerodynamically acting rear silencer for a motor vehicle |
| US10823021B2 (en) | 2016-11-21 | 2020-11-03 | Dr. Ing. H.C.F. Porsche Aktiengesellschaft | Aerodynamically acting final silencer for a motor vehicle |
| DE202016009175U1 (en) | 2016-11-21 | 2023-06-23 | Dr. Ing. h.c. F. Porsche Aktiengesellschaft | Aerodynamic rear silencer for a motor vehicle |
| DE202016009174U1 (en) | 2016-11-21 | 2023-06-23 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Aerodynamic rear silencer for a motor vehicle |
| DE102016122287B4 (en) | 2016-11-21 | 2023-07-20 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Aerodynamic rear silencer for a motor vehicle |
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| JP3912037B2 (en) | 2007-05-09 |
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