JP2015120451A - Vehicle lower part structure - Google Patents

Vehicle lower part structure Download PDF

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JP2015120451A
JP2015120451A JP2013266058A JP2013266058A JP2015120451A JP 2015120451 A JP2015120451 A JP 2015120451A JP 2013266058 A JP2013266058 A JP 2013266058A JP 2013266058 A JP2013266058 A JP 2013266058A JP 2015120451 A JP2015120451 A JP 2015120451A
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vehicle
opening
floor
tunnel
front opening
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JP6248613B2 (en
JP2015120451A5 (en
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杵島　史彦
Fumihiko Kinejima
史彦 杵島
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Toyota Motor Corp
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Toyota Motor Corp
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Abstract

PROBLEM TO BE SOLVED: To inhibit airflow from stagnating in a tunnel part covered by a floor cover.SOLUTION: A vehicle lower part structure 10 includes: a floor 12 provided at a vehicle lower part; a tunnel part 14 which is provided at a center position of the floor 12 when viewed in a vehicle width direction and communicates with an opening part 18 provided at a vehicle front part; and a floor cover 16 which covers the floor 12 including a front end to a rear end of the tunnel part 14 from the vehicle lower side and includes a first front opening part 31, a second front opening part 32, and a rear opening part 34 (an opening) at the vehicle lower side of the tunnel part 14.

Description

本発明は、車両下部構造に関する。   The present invention relates to a vehicle lower structure.

車両下部を車両前端から車両後端まで覆うフロアカバーが開示されている（特許文献１参照）。   A floor cover that covers the lower part of the vehicle from the front end of the vehicle to the rear end of the vehicle is disclosed (see Patent Document 1).

実開昭５８−１５３１７５号公報Japanese Utility Model Publication No. 58-153175

フロントグリル等、車両の前部から車両内側に取り入れられた空気は、エンジンルームを通過し、車両のフロアのトンネル部へと流れる。しかしながら、トンネル部の車両下側はフロアカバーで覆われていて開口がないため、トンネル部の空気の流れが停滞し易い。   Air taken into the vehicle inside from the front of the vehicle, such as the front grille, passes through the engine room and flows to the tunnel portion of the vehicle floor. However, since the vehicle lower side of the tunnel portion is covered with a floor cover and has no opening, the air flow in the tunnel portion is likely to stagnate.

本発明は、上記の事実を考慮し、フロアカバーで覆われたトンネル部における空気の流れの停滞を抑制することを目的とする。   In view of the above facts, an object of the present invention is to suppress the stagnation of air flow in a tunnel portion covered with a floor cover.

請求項１に係る車両下部構造は、車両下部に設けられるフロアと、前記フロアの車幅方向中央位置に設けられ、車両前部に設けられた開口部と連通したトンネル部と、前記トンネル部の前端から後端までを含む前記フロアを車両下側から覆い、かつ前記トンネル部の車両下側に開口を有するフロアカバーと、を備えている。   A vehicle lower structure according to claim 1 is a floor provided at a lower portion of the vehicle, a tunnel portion provided at a center position in the vehicle width direction of the floor, and communicated with an opening provided at a front portion of the vehicle, A floor cover that covers the floor including the front end to the rear end from the vehicle lower side and has an opening on the vehicle lower side of the tunnel portion.

この車両下部構造によれば、車両前部の開口部から車両内側に取り入れられた空気が、フロアカバーで覆われたトンネル部内を流れる際に、該フロアカバーの開口から車両外側へ排出される。これにより、トンネル部内の圧力が低くなるため、車両前部の開口部から車両内側に取り入れられた空気がトンネル部へ流れ易くなる。このため、フロアカバーで覆われたトンネル部における空気の流れの停滞を抑制することができる。   According to this vehicle lower structure, when the air taken into the vehicle inside from the opening at the front of the vehicle flows through the tunnel portion covered with the floor cover, the air is discharged from the opening in the floor cover to the outside of the vehicle. Thereby, since the pressure in the tunnel part becomes low, the air taken into the vehicle inside from the opening part of the vehicle front part easily flows into the tunnel part. For this reason, the stagnation of the air flow in the tunnel portion covered with the floor cover can be suppressed.

本発明によれば、フロアカバーで覆われたトンネル部における空気の流れの停滞を抑制することができる。   ADVANTAGE OF THE INVENTION According to this invention, the stagnation of the air flow in the tunnel part covered with the floor cover can be suppressed.

車両下部構造を示す底面図である。It is a bottom view which shows a vehicle lower part structure. （Ａ）車両下部構造における空気の流れを示す、図１における２Ａ−２Ａ矢視拡大断面図である。（Ｂ）フロアカバーにおける吸込みダクト及び部品逃げ穴を示す、図１における２Ｂ−２Ｂ矢視拡大断面図である。(A) It is a 2A-2A arrow expanded sectional view in FIG. 1 which shows the flow of the air in a vehicle lower part structure. (B) It is a 2B-2B arrow expanded sectional view in FIG. 1 which shows the suction duct and component escape hole in a floor cover. フロアカバーの吸込みダクト、部品逃げ穴、第１前開口部、第２前開口部及び後開口部を通じた空気の流れを示す斜視図である。It is a perspective view which shows the flow of the air through the suction duct of a floor cover, a component escape hole, a 1st front opening part, a 2nd front opening part, and a rear opening part. 変形例に係り、フロアカバーの開口を通じた空気の流れを示す斜視図である。It is a perspective view which shows the flow of the air through the opening of a floor cover concerning a modification.

以下、本発明に係る実施の形態について、図面を基に詳細に説明する。なお、説明の便宜上、各図において適宜示す矢印ＵＰを車両上方向、矢印ＦＲを車両前方向、矢印ＲＨを車両右方向、矢印ＬＨを車両左方向、矢印Ｗを車幅方向とする。   Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. For convenience of explanation, an arrow UP appropriately shown in each drawing is an upward direction of the vehicle, an arrow FR is a front direction of the vehicle, an arrow RH is a right direction of the vehicle, an arrow LH is a left direction of the vehicle, and an arrow W is a vehicle width direction.

図１において、本実施形態に係る車両下部構造１０は、フロア１２と、トンネル部１４（図２）と、フロアカバー１６と、を有している。   In FIG. 1, the vehicle lower structure 10 according to the present embodiment includes a floor 12, a tunnel portion 14 (FIG. 2), and a floor cover 16.

フロア１２は、車両下部に設けられる、例えばフロアパネルである。このフロア１２は、車両のボディの一部を構成している。   The floor 12 is, for example, a floor panel provided at the lower part of the vehicle. The floor 12 constitutes a part of the vehicle body.

トンネル部１４は、フロア１２の車幅方向中央位置に設けられ、車両下向きに凹状に形成され、車両前後方向に延びている。このトンネル部１４は、車両前部に設けられた開口部１８と連通している。開口部１８は、図示しないグリル等の空気取入れ口である。   The tunnel portion 14 is provided at a center position in the vehicle width direction of the floor 12, is formed in a concave shape downward in the vehicle, and extends in the vehicle front-rear direction. The tunnel portion 14 communicates with an opening 18 provided in the front portion of the vehicle. The opening 18 is an air intake such as a grill (not shown).

フロアカバー１６は、トンネル部１４の前端から後端までを含むフロア１２を車両下側から覆っており、フロア１２又は他の部位に対して、ボルト及びナットの締結や、クリップ留め（何れも図示せず）等により取り付けられている。このフロアカバー１６は、トンネル部１４の車両下側に、開口の一例たる部品逃げ穴２０、吸込みダクト２２、第１前開口部３１、第２前開口部３２、及び後開口部３４を有している。   The floor cover 16 covers the floor 12 including the front end to the rear end of the tunnel portion 14 from the lower side of the vehicle. The floor cover 16 is fastened with bolts and nuts or clipped to the floor 12 or other parts (both are shown in the figure). (Not shown) or the like. The floor cover 16 has a component relief hole 20, an intake duct 22, a first front opening 31, a second front opening 32, and a rear opening 34 as an example of an opening on the vehicle lower side of the tunnel portion 14. ing.

図２に示されるように、部品逃げ穴２０は、排気系部品２６との干渉や、排気系部品２６の熱の影響を避けるために形成されている。排気系部品２６とは、排気管、触媒コンバーター等である。この部品逃げ穴２０は、フロアカバー１６の車幅方向の中心に対して、左右対称に一対設けられている。各々の部品逃げ穴２０は、例えば略矩形に形成されている。   As shown in FIG. 2, the component relief hole 20 is formed to avoid interference with the exhaust system component 26 and the influence of heat from the exhaust system component 26. The exhaust system component 26 is an exhaust pipe, a catalytic converter, or the like. A pair of the component relief holes 20 are provided symmetrically with respect to the center of the floor cover 16 in the vehicle width direction. Each component relief hole 20 is formed in a substantially rectangular shape, for example.

吸込みダクト２２は、部品逃げ穴２０の車幅方向外側に隣接して形成され、トンネル部１４内の車両後方側に向けて開口している。吸込みダクト２２の車幅方向の幅は、車両後方へ向かって広がっている。また、吸込みダクト２２はガイド部２４を有している。このガイド部２４は、車両後方上側へ傾斜し、水平方向と成す角度が車両前方側から後方側へ向かって大きくなるＲ状とされている。   The suction duct 22 is formed adjacent to the outer side in the vehicle width direction of the component relief hole 20 and opens toward the vehicle rear side in the tunnel portion 14. The width of the suction duct 22 in the vehicle width direction is widened toward the rear of the vehicle. The suction duct 22 has a guide portion 24. The guide portion 24 is inclined in the rear upper side, and has an R shape in which an angle formed with the horizontal direction increases from the front side of the vehicle toward the rear side.

第２前開口部３２は、第１前開口部３１の車両後側に隣接して配置されている。第１前開口部３１及び第２前開口部３２は、車幅方向の中心に対して、左右対称に２つずつ設けられている。２つの第１前開口部３１は、車幅方向に互いに離間している。同様に、２つの第２前開口部３２は、車幅方向に互いに離間している。   The second front opening 32 is disposed adjacent to the vehicle rear side of the first front opening 31. Two first front openings 31 and two second front openings 32 are provided symmetrically with respect to the center in the vehicle width direction. The two first front openings 31 are separated from each other in the vehicle width direction. Similarly, the two second front openings 32 are separated from each other in the vehicle width direction.

第１前開口部３１はガイド部４１を有し、第２前開口部３２はガイド部４２を有している。ガイド部４１，４２は、Ｒ状に湾曲する板状とされ、Ｒ状の凸面側が前方下向きになるようにトンネル部１４内に配置されている。ガイド部４１，４２は、車両後方下側へ傾斜し、水平方向と成す角度が車両前方側から後方側へ向かって小さくなるＲ状とされている。   The first front opening 31 has a guide part 41, and the second front opening 32 has a guide part 42. The guide portions 41 and 42 are plate-shaped curved in an R shape, and are disposed in the tunnel portion 14 so that the R-shaped convex surface side faces downward in the front. The guide portions 41 and 42 are inclined to the lower rear side of the vehicle, and have an R shape in which the angle formed with the horizontal direction decreases from the front side of the vehicle toward the rear side.

ガイド部４１，４２の車両前側には、トンネル部１４内に開口する流入口５１，５２が形成されている。トンネル部１４から流入口５１，５２へ流入した空気は、ガイド部４１，４２の下面に沿って流れて、第１前開口部３１及び第２前開口部３２から車両外側へ排出されるようになっている。   Inlets 51 and 52 that open into the tunnel portion 14 are formed on the vehicle front side of the guide portions 41 and 42. Air flowing into the inflow ports 51 and 52 from the tunnel portion 14 flows along the lower surfaces of the guide portions 41 and 42 and is discharged from the first front opening 31 and the second front opening 32 to the outside of the vehicle. It has become.

フロアカバー１６の車両後側は、後開口部３４となっている。この後開口部３４は、車両外側に開放されており、トンネル部１４内のガイド部４２の上面に沿って流れる気流が、後開口部３４から車外へ排出されるようになっている。   A rear opening 34 is provided on the vehicle rear side of the floor cover 16. The rear opening 34 is open to the outside of the vehicle, and the airflow flowing along the upper surface of the guide part 42 in the tunnel part 14 is discharged from the rear opening 34 to the outside of the vehicle.

この他、フロアカバー１６には、小開口部３６、第１前開口部６１、第２前開口部６２が形成されている。小開口部３６は、例えば第１開口部３１を車幅方向に狭くした構造であり、フロアカバー１６の車幅方向の両端部に、夫々車両前後方向に直列に複数配置されている。第１前開口部６１及び第２前開口部６２は、エンジンルーム（図示せず）の車両下方に配置されている。この第１前開口部６１及び第２前開口部６２は、第１前開口部３１、第２前開口部３２よりも車幅方向及び車両前後方向に大きく形成されている。エンジンルーム２８内から車両下方に流れる空気の一部は、第１前開口部６１及び第２前開口部６２を通じて車外へ排出されるようになっている。   In addition, a small opening 36, a first front opening 61, and a second front opening 62 are formed in the floor cover 16. The small openings 36 have, for example, a structure in which the first openings 31 are narrowed in the vehicle width direction, and a plurality of small openings 36 are arranged in series in the vehicle front-rear direction at both ends of the floor cover 16 in the vehicle width direction. The first front opening 61 and the second front opening 62 are disposed below the vehicle in an engine room (not shown). The first front opening 61 and the second front opening 62 are formed larger in the vehicle width direction and the vehicle front-rear direction than the first front opening 31 and the second front opening 32. Part of the air flowing from the inside of the engine room 28 to the lower side of the vehicle is discharged outside the vehicle through the first front opening 61 and the second front opening 62.

車両の下部前側には、前アンダーカバー２８が配設されている。前アンダーカバー２８は、車両のエンジンルーム（不図示）下側を覆うように車両の前端から前輪１１の後側まで延出され、車両の底面を形成している。   A front under cover 28 is disposed on the lower front side of the vehicle. The front under cover 28 extends from the front end of the vehicle to the rear side of the front wheels 11 so as to cover the lower side of the engine room (not shown) of the vehicle, and forms the bottom surface of the vehicle.

（作用）
本実施形態は上記のように構成されており、以下その作用について説明する。図２，図３において、本実施形態に係る車両下部構造１０では、車両前部の開口部１８から車両内側に空気が取り入れられ、フロアカバー１６で覆われたトンネル部１４内を流れる。この際、この空気は、フロアカバー１６の開口（第１前開口部３１、第２前開口部３２、後開口部３４等）から車両外側へ排出される。これにより、トンネル部１４内の圧力が低くなるため、車両前部の開口部１８から車両内側に取り入れられた空気がトンネル部１４へ流れ易くなる。このため、フロアカバー１６で覆われたトンネル部１４における空気の流れの停滞を抑制することができる。 (Function)
This embodiment is configured as described above, and the operation thereof will be described below. 2 and 3, in the vehicle lower structure 10 according to the present embodiment, air is taken into the vehicle inside from the opening 18 at the front of the vehicle and flows through the tunnel portion 14 covered with the floor cover 16. At this time, the air is discharged from the opening of the floor cover 16 (the first front opening 31, the second front opening 32, the rear opening 34, etc.) to the outside of the vehicle. Thereby, since the pressure in the tunnel part 14 becomes low, the air taken into the vehicle inner side from the opening part 18 of the vehicle front part becomes easy to flow into the tunnel part 14. For this reason, the stagnation of the air flow in the tunnel portion 14 covered with the floor cover 16 can be suppressed.

具体的には、図２に示されるように、車両走行時におけるフロア１２の車両下側の空気は、車両床下に沿って後方へ流れる（気流Ａ１）。トンネル部１４内を流れる空気は、ガイド部４１，４２により車両後方下側へ向かい、気流Ａ４、Ａ５、Ａ６に分かれて、第１前開口部３１、第２前開口部３２及び後開口部３４から各々排出される。したがって、気流Ａ１、Ａ４、Ａ５、Ａ６をスムーズに合流させることができる。このため、気流Ａ１の乱れを抑制できる。   Specifically, as shown in FIG. 2, the air below the floor 12 of the vehicle when the vehicle travels flows backward along the vehicle floor (air flow A1). The air flowing through the tunnel portion 14 is directed to the rear lower side of the vehicle by the guide portions 41 and 42, and is divided into airflows A4, A5, and A6. Each is discharged from. Therefore, the airflows A1, A4, A5, A6 can be smoothly merged. For this reason, disturbance of airflow A1 can be suppressed.

また、図３に示されるように、本実施形態では、部品逃げ穴２０に隣接した吸込みダクト２２を通じて、フロア１２の車両下側の空気をトンネル部１４内に取り込むことができる（気流Ａ２）。気流Ａ２により生ずる負圧により、部品逃げ穴２０からの空気の吹出しを抑制し、該部品逃げ穴２０からも空気を取り込むことができる（気流Ａ３）。このため、気流Ａ１の乱れを抑制できる。また、気流Ａ２，Ａ３により、車外の比較的冷たい空気を排気系部品２６に当てることができるので、該排気系部品２６の冷却効率が向上する。   As shown in FIG. 3, in the present embodiment, the air below the vehicle on the floor 12 can be taken into the tunnel portion 14 through the suction duct 22 adjacent to the component relief hole 20 (airflow A2). The negative pressure generated by the airflow A2 can suppress the blow-out of air from the component escape hole 20 and can also take in air from the component escape hole 20 (airflow A3). For this reason, disturbance of airflow A1 can be suppressed. Further, since the airflows A2 and A3 allow relatively cool air outside the vehicle to be applied to the exhaust system component 26, the cooling efficiency of the exhaust system component 26 is improved.

部品逃げ穴２０及び吸込みダクト２２の車両後方には、第１前開口部３１、第２前開口部３２及び後開口部３４が配置されているので、部品逃げ穴２０及び吸込みダクト２２から取り込まれた気流Ａ２，Ａ３を、第１前開口部３１、第２前開口部３２及び後開口部３４から気流Ａ４、Ａ５、Ａ６として速やかに排出することができる。   Since the first front opening 31, the second front opening 32 and the rear opening 34 are arranged behind the parts relief hole 20 and the suction duct 22, they are taken in from the parts relief hole 20 and the suction duct 22. The airflows A2 and A3 can be quickly discharged as airflows A4, A5, and A6 from the first front opening 31, the second front opening 32, and the rear opening 34.

なお、フロアカバー１６に設けられた他の開口部（小開口部３６、第１前開口部６１、第２前開口部６２）からも、車外への空気の排出を行うことができる。   Note that air can also be discharged out of the vehicle from other openings provided in the floor cover 16 (small opening 36, first front opening 61, second front opening 62).

［他の実施形態］
上記実施形態では、部品逃げ穴２０と吸込みダクト２２とが車幅方向に隣接するものとしたが、図４に示されるように、吸込みダクト２２を設け、部品逃げ穴を設けない構成としてもよい。 [Other Embodiments]
In the above embodiment, the component relief hole 20 and the suction duct 22 are adjacent to each other in the vehicle width direction. However, as shown in FIG. 4, the suction duct 22 may be provided and the component relief hole may not be provided. .

また、第２前開口部３２がフロアカバー１６の後端に設けられるものとしたが、第２前開口部３２がより車両前方側に設けられ、後開口部３４と第２前開口部３２とが車両前後方向に離間していてもよい。
更に、第１前開口部３１及び第２前開口部３２のうち、何れかを省略してもよい。 Moreover, although the 2nd front opening part 32 shall be provided in the rear end of the floor cover 16, the 2nd front opening part 32 is provided in the vehicle forward side, and the rear opening part 34, the 2nd front opening part 32, May be spaced apart in the vehicle longitudinal direction.
Further, either the first front opening 31 or the second front opening 32 may be omitted.

１０ 車両下部構造
１２ フロア
１４ トンネル部
１６ フロアカバー
１８ 開口部
２２ 部品逃げ穴（開口）
３１ 第１前開口部（開口）
３２ 第２前開口部（開口）
３４ 後開口部（開口） DESCRIPTION OF SYMBOLS 10 Vehicle lower structure 12 Floor 14 Tunnel part 16 Floor cover 18 Opening part 22 Parts escape hole (opening)
31 First front opening (opening)
32 Second front opening (opening)
34 Rear opening (opening)

Claims (1)

車両下部に設けられるフロアと、
前記フロアの車幅方向中央位置に設けられ、車両前部に設けられた開口部と連通したトンネル部と、
前記トンネル部の前端から後端までを含む前記フロアを車両下側から覆い、かつ前記トンネル部の車両下側に開口を有するフロアカバーと、
を備えた車両下部構造。 A floor provided at the bottom of the vehicle;
A tunnel portion provided at a center position in the vehicle width direction of the floor, and communicated with an opening portion provided in a front portion of the vehicle;
A floor cover that covers the floor including the front end to the rear end of the tunnel portion from the vehicle lower side and has an opening on the vehicle lower side of the tunnel portion;
Vehicle lower structure equipped with.
JP2013266058A 2013-12-24 2013-12-24 Vehicle lower structure Active JP6248613B2 (en)

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DE102015220922A1 (en) * 2015-10-27 2017-04-27 Bayerische Motoren Werke Aktiengesellschaft Heat dissipation device for a transmission tunnel of a motor vehicle
CN107878576A (en) * 2016-09-30 2018-04-06 丰田自动车株式会社 Vehicle substructure
JP2018165119A (en) * 2017-03-28 2018-10-25 マツダ株式会社 Lower vehicle body structure of vehicle
JP2019064315A (en) * 2017-09-28 2019-04-25 マツダ株式会社 Substructure of vehicle body
JP2020082842A (en) * 2018-11-19 2020-06-04 小島プレス工業株式会社 Assembling structure of undercover under exhaust pipe

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JPH07215074A (en) * 1994-02-07 1995-08-15 Toyota Motor Corp Under-cover device for vehicle
JP2012011854A (en) * 2010-06-30 2012-01-19 Mazda Motor Corp Underfloor structure of vehicle

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JPH07215074A (en) * 1994-02-07 1995-08-15 Toyota Motor Corp Under-cover device for vehicle
JP2012011854A (en) * 2010-06-30 2012-01-19 Mazda Motor Corp Underfloor structure of vehicle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015220922A1 (en) * 2015-10-27 2017-04-27 Bayerische Motoren Werke Aktiengesellschaft Heat dissipation device for a transmission tunnel of a motor vehicle
CN107878576A (en) * 2016-09-30 2018-04-06 丰田自动车株式会社 Vehicle substructure
JP2018058383A (en) * 2016-09-30 2018-04-12 トヨタ自動車株式会社 Lower structure of vehicle
JP2018165119A (en) * 2017-03-28 2018-10-25 マツダ株式会社 Lower vehicle body structure of vehicle
JP2019064315A (en) * 2017-09-28 2019-04-25 マツダ株式会社 Substructure of vehicle body
JP2020082842A (en) * 2018-11-19 2020-06-04 小島プレス工業株式会社 Assembling structure of undercover under exhaust pipe
JP7106431B2 (en) 2018-11-19 2022-07-26 小島プレス工業株式会社 Assembly structure of under cover under exhaust pipe

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