JP2021070329A - Vehicle front structure - Google Patents

Vehicle front structure Download PDF

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JP2021070329A
JP2021070329A JP2019195761A JP2019195761A JP2021070329A JP 2021070329 A JP2021070329 A JP 2021070329A JP 2019195761 A JP2019195761 A JP 2019195761A JP 2019195761 A JP2019195761 A JP 2019195761A JP 2021070329 A JP2021070329 A JP 2021070329A
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heat source
cover
air
opening
engine room
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JP7313776B2 (en
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由宗 車野
Yoshimune Kurumano
由宗 車野
太一 森岡
Taichi Morioka
太一 森岡
圭汰 江藤
Keita Eto
圭汰 江藤
健佑 濱田
Kensuke Hamada
健佑 濱田
豊 大瀬良
Yutaka Osera
豊 大瀬良
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Daihatsu Motor Co Ltd
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Daihatsu Motor Co Ltd
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  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

To provide vehicle front structure which enhances cooling ability and at the same time makes it possible to bring the cost down in spite of comparatively simple structure.SOLUTION: In the cooling structure for air-cooling a heat source of inside of an engine room 12, it is configured so as to be provided with an inlet port 13 coming into fluid communication with inside of the engine room 12 on a vehicle forward end exterior member 11 and to be provided with a guide member 14 for introducing wind to a direction of the heat source on the inlet port 13 and to be arranged at a predetermined position with a cover 17 which covers at least one part of the heat source and at the same time includes an opening on lateral face on inside of the engine room 12 and so that the guide member 14 includes structure for introducing outside air so as to face an opening end part 18 of at least cover lateral face.SELECTED DRAWING: Figure 3

Description

本発明は、車両前部構造に関する。 The present invention relates to a vehicle front structure.

自動車のエンジンルーム内には、様々な熱源が存在する。これら熱源は、開口部を有するフロントグリルから取り込まれる外気（走行風）を利用して冷却が図られており、例えば、外気の取り込み性能をより向上させつつ、走行中の異物や泥水の浸入は抑制することのできるインタークーラー付自動車のグリル部構造が提案されている（例えば、特許文献１参照）。 There are various heat sources in the engine room of an automobile. These heat sources are cooled by using the outside air (running wind) taken in from the front grille having an opening. For example, while further improving the taking-in performance of the outside air, foreign matter and muddy water during running are prevented from entering. A grille structure of an automobile with an intercooler that can be suppressed has been proposed (see, for example, Patent Document 1).

特開２００４−１１４９８４号公報Japanese Unexamined Patent Publication No. 2004-114984

しかし、近年では、単に走行風を熱源に当てるだけではなく、より効率よく熱源を冷却することが求められている。エンジンルーム内が高温になる状態が長く続くと、部品に熱害が生じ易くなる。このような熱害を防ぎ、構成部品の機能低下を抑えるためには、高耐熱性素材を用いるなど、材質の高グレード化が必要となり、コストの増大につながっていた。そこで、より効率よく熱源を冷却することにより、例えば、熱源付近に設けられる部材について、高耐熱性素材を使用することなく構成することが可能となれば、コストダウンを図ることができ、さらに、リサイクルの容易化も可能となることから望ましい。本発明は前記課題を解決するものであり、比較的簡易な構造であるにもかかわらず、冷却能力を向上させるとともに、コストダウンも可能となる車両前部構造を提供することを目的とする。 However, in recent years, it has been required not only to apply the running wind to the heat source but also to cool the heat source more efficiently. If the temperature inside the engine room continues to be high for a long time, heat damage is likely to occur in the parts. In order to prevent such heat damage and suppress functional deterioration of component parts, it is necessary to upgrade the material such as using a highly heat-resistant material, which has led to an increase in cost. Therefore, by cooling the heat source more efficiently, for example, if it becomes possible to construct a member provided near the heat source without using a highly heat-resistant material, the cost can be reduced, and further, the cost can be reduced. It is desirable because it enables easy recycling. The present invention solves the above problems, and an object of the present invention is to provide a vehicle front structure capable of improving cooling capacity and reducing costs in spite of having a relatively simple structure.

上記目的を達成するために、本発明の車両前部構造は、エンジンルーム内の熱源を空冷するための冷却構造であって、車両前端外装部材には前記エンジンルーム内に連通する吸気口が設けられ、前記吸気口には、前記熱源の方向に導風するためのガイド部材が設けられており、前記エンジンルーム内には、前記熱源の少なくとも一部を覆うとともに側面に開口部を有するカバーが配設され、前記ガイド部材は、少なくとも前記カバー側面の開口端部に沿うように外気を導風する構造を有していることを特徴とする。 In order to achieve the above object, the vehicle front structure of the present invention is a cooling structure for air-cooling the heat source in the engine room, and the vehicle front end exterior member is provided with an intake port communicating with the engine room. The intake port is provided with a guide member for guiding air in the direction of the heat source, and in the engine room, a cover that covers at least a part of the heat source and has an opening on a side surface is provided. The guide member is disposed and is characterized by having a structure for guiding outside air at least along the open end portion of the side surface of the cover.

本発明によれば、比較的簡易な構造であるにもかかわらず、冷却能力を向上させるとともに、コストダウンも可能となる車両前部構造を提供することができる。 According to the present invention, it is possible to provide a vehicle front structure capable of improving cooling capacity and reducing costs in spite of having a relatively simple structure.

図１は、本発明にかかる車両前部構造の一例を、上側から見た概略図である。FIG. 1 is a schematic view of an example of the vehicle front structure according to the present invention as viewed from above. 図２は、ガイド部材の一例を、車両前側方向から見た斜視図である。FIG. 2 is a perspective view of an example of the guide member as viewed from the front side of the vehicle. 図３は、外気の導風の状態を説明する模式図である。FIG. 3 is a schematic diagram illustrating a state of air conduction of outside air. 図４は、フロントグリルにおける吸気口の形状の一例を示す正面図である。FIG. 4 is a front view showing an example of the shape of the intake port in the front grill.

以下、この発明の実施の形態を、図面を参照しながら説明する。ただし、本発明は、以下の例に限定および制限されない。なお、以下で参照する図面は、模式的に記載されたものであり、図面に描画された物体の寸法の比率などは、現実の物体の寸法の比率などとは異なる場合がある。図面相互間においても、物体の寸法比率等が異なる場合がある。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to and limited to the following examples. The drawings referred to below are schematically described, and the ratio of the dimensions of the objects drawn in the drawings may differ from the ratio of the dimensions of the actual object. The dimensional ratios of objects may differ between the drawings.

図１に、本発明にかかる車両前部構造の一例を、上側から見た概略図を示す。図１においては、下方向が車両の前方である。車両の前端には、外装部材であるフロントグリル１１が配置されている。フロントグリル１１には、外気をエンジンルーム１２の中に取り込むための吸気口１３が設けられている。吸気口１３は、エンジンルーム１２内に連通する開口をフロントグリル１１に設けることで構成されている。 FIG. 1 shows a schematic view of an example of the vehicle front structure according to the present invention as viewed from above. In FIG. 1, the downward direction is the front of the vehicle. A front grill 11 which is an exterior member is arranged at the front end of the vehicle. The front grill 11 is provided with an intake port 13 for taking in outside air into the engine room 12. The intake port 13 is configured by providing an opening in the front grill 11 that communicates with the engine room 12.

エンジンルーム１２の内部には、エンジン本体１０、ターボ１５ａ（リンクピン１５ｂを含む）、インシュレータ、エキゾーストマニホールド（排気ガスパイプ）１５ｃ、インタークーラー１６等が設けられている。これらのうち、ターボ１５ａやエキゾーストマニホールド１５ｃは熱源となる。熱源には、周辺部品との熱害防止（熱源による故障、溶融、めっき剥がれ、部品亀裂など）、整備時等における高温部との接触を防ぐために、遮熱板や遮水板等によるカバー１７が設けられている。熱源は、このカバー１７によって、効率的な冷却が阻害される場合があった。 Inside the engine room 12, an engine body 10, a turbo 15a (including a link pin 15b), an insulator, an exhaust manifold (exhaust gas pipe) 15c, an intercooler 16, and the like are provided. Of these, the turbo 15a and the exhaust manifold 15c serve as heat sources. The heat source includes a cover 17 with a heat shield, a water shield, etc. to prevent heat damage to peripheral parts (malfunction due to the heat source, melting, peeling of plating, cracks in parts, etc.) and to prevent contact with high temperature parts during maintenance. Is provided. As for the heat source, efficient cooling may be hindered by the cover 17.

本発明においては、カバー１７は、熱源の少なくとも一部を覆うとともに側面には開口部を有している。そして、吸気口１３には、エンジンルーム１２内に存在する熱源の方向に導風するためのガイド部材１４が設けられている。本実施の形態においては、フロントグリル１１後方に、ガイド部材１４としてエアダクトが配置されている。エアダクトは、熱源の前方位置となるように配置されている。そして、ガイド部材１４は少なくともカバー側面の開口端部１８に沿うように外気を導風する構造を有している。カバー側面の開口端部１８に沿うように外気を導入することで、カバー１７内部の熱気を引き抜くことができるため、冷却効率の向上を実現することができる。 In the present invention, the cover 17 covers at least a part of the heat source and has an opening on the side surface. The intake port 13 is provided with a guide member 14 for guiding air in the direction of the heat source existing in the engine room 12. In the present embodiment, an air duct is arranged as a guide member 14 behind the front grill 11. The air duct is arranged so as to be in front of the heat source. The guide member 14 has a structure for guiding the outside air at least along the opening end portion 18 on the side surface of the cover. By introducing the outside air along the opening end portion 18 on the side surface of the cover, the hot air inside the cover 17 can be drawn out, so that the cooling efficiency can be improved.

図２に、ガイド部材１４の一例である略角筒状のエアダクトの斜視図を示す。図２は、エアダクト１４を、フロントグリル１１側から見た状態である。このエアダクトは、開口の開口面積が車両前方側から車両後方側に向けて縮小する形状である。このように、エアダクト１４を車両後方側に向けて先細りの形状とすることで、導風される外気の流速を上げることができるため、開口部を大きくせずに効率的に冷却効果が得られる。なお、エアダクト１４を、このような先細りの形状とすると、空気抵抗を低くする、すなわち、ＣＤ値（車両においてエアダクト１４が省略された場合の空気抵抗係数からの変化量）を下げる）ことができる。さらに、エンジンルーム１２内の構造がフロント（Ｆｒ）側から見えにくくなることで、デザイン性の点でも有利である。エアダクトの開口内にはリブ１９が形成され、左右２室に分離されている。エアダクト１４の形状（外形）とリブ１９の方向を、いずれも右斜め方向とすることで、リブ１９の左側の開口から導入される外気を、カバー側面の開口端部１８に向かわせることができる。また、リブ１９の右側の開口から導入される外気は、カバー１７正面に向かわせることができる。このようにエアダクト１４に、導入される外気の指向性を高めるリブ１９を設け、導風方向とカバー側面の開口端部１８とを車幅方向で略同一とすることで、リブ１９の左側の開口から導入される外気は上記の熱気の引き抜きに寄与し、他方のリブ１９の右側の開口から導入される外気はカバー１７への導風によりカバー１７を外側から冷却可能とすることができる。なお、図１においては、カバー側面の開口端部１８は、車幅方向に設けられているが、開口端部１８の角度は、前記車幅方向に対して４５°以下程度のばらつきは許容される。 FIG. 2 shows a perspective view of a substantially square tubular air duct which is an example of the guide member 14. FIG. 2 shows a state in which the air duct 14 is viewed from the front grill 11 side. This air duct has a shape in which the opening area of the opening decreases from the front side of the vehicle toward the rear side of the vehicle. By forming the air duct 14 in a tapered shape toward the rear side of the vehicle in this way, the flow velocity of the outside air guided by the air can be increased, so that the cooling effect can be efficiently obtained without enlarging the opening. .. If the air duct 14 has such a tapered shape, the air resistance can be lowered, that is, the CD value (the amount of change from the air resistance coefficient when the air duct 14 is omitted in the vehicle) can be lowered. .. Further, the structure inside the engine room 12 is difficult to see from the front (Fr) side, which is advantageous in terms of design. A rib 19 is formed in the opening of the air duct and is separated into two chambers on the left and right. By setting both the shape (outer shape) of the air duct 14 and the direction of the rib 19 to the right oblique direction, the outside air introduced from the opening on the left side of the rib 19 can be directed to the opening end 18 on the side surface of the cover. .. Further, the outside air introduced from the opening on the right side of the rib 19 can be directed to the front surface of the cover 17. In this way, the air duct 14 is provided with a rib 19 that enhances the directivity of the introduced outside air, and the wind guiding direction and the opening end 18 on the side surface of the cover are substantially the same in the vehicle width direction, so that the left side of the rib 19 The outside air introduced from the opening contributes to the extraction of the hot air described above, and the outside air introduced from the opening on the right side of the other rib 19 can cool the cover 17 from the outside by guiding the air to the cover 17. In FIG. 1, the opening end portion 18 on the side surface of the cover is provided in the vehicle width direction, but the angle of the opening end portion 18 is allowed to vary by about 45 ° or less with respect to the vehicle width direction. To.

カバー１７には、側面（開口端部１８）に加えて正面側（車両前方）に、別の開口部（貫通孔、スリット）を設けてもよい。カバー側面の開口端部１８に沿うように外気を導入することによるカバー１７内部の熱気を引き抜く際に、前記スリットから導入される外気を取り込むことで、よりカバー１７内部の熱気を引き抜きやすくすることができ、冷却効率の向上を実現することができる。 The cover 17 may be provided with another opening (through hole, slit) on the front side (front of the vehicle) in addition to the side surface (opening end 18). When the hot air inside the cover 17 is pulled out by introducing the outside air along the opening end portion 18 on the side surface of the cover, the hot air inside the cover 17 can be more easily pulled out by taking in the outside air introduced from the slit. It is possible to improve the cooling efficiency.

ここでは、ガイド部材１４の一例としてエアダクトを説明したが、ガイド部材１４は、導風効果があればよく、形状は筒状であるものに限られず、リブ等をガイド部材１４として用いることもできる。一例として、車両のフード下方とフロントバンパ上部との間にガイドリブを設け、ガイドリブによって熱源まで導風する構成とすることができる。 Here, the air duct has been described as an example of the guide member 14, but the guide member 14 may have a wind guiding effect, and the shape is not limited to the tubular shape, and ribs and the like can also be used as the guide member 14. .. As an example, a guide rib may be provided between the lower part of the hood of the vehicle and the upper part of the front bumper, and the guide rib may be used to guide the air to the heat source.

また、カバー側面の開口端部１８に沿うように外気を導風するのに加えて、前記の別の開口部（貫通孔、スリット）方向に外気を導風可能となるような他のガイド部材をさらに有していると、冷却効率の観点からより好ましい。他のガイド部材として、例えば、熱源方向に導風する開口（吸気口）とは別にエンジンルーム内に貫通する開口（吸気口）を設けることができる。 Further, in addition to guiding the outside air along the opening end portion 18 on the side surface of the cover, another guide member that can guide the outside air in the direction of the other opening (through hole, slit) described above. Is more preferable from the viewpoint of cooling efficiency. As another guide member, for example, an opening (intake port) that penetrates into the engine room can be provided separately from the opening (intake port) that guides air toward the heat source.

図３に、外気の導風の状態を模式的に示して本発明の効果を説明する。ガイド部材（エアダクト）１４から外気は、図中の矢印方向に導風される。カバー１７の後側には熱源１５ａがあり、カバー１７の内部および熱源により熱を帯びやすい部材を効率よく冷却することができれば、前記部材が過熱されることがないため、高耐熱性素材から、例えばリサイクル特性に優れた素材への置き換えが可能となる。カバー１７内部および前記部材付近を効率的に冷却するためには、図中、Ｓで示す領域（カバー側面の開口端部１８付近）に特に外気を当てることが好ましい。この領域Ｓに外気を当てることで、カバー１７の側面の開口部から、カバー１７内部の熱気を引き抜き、冷却効率の向上が実現する。 FIG. 3 schematically shows the state of the wind guide of the outside air to explain the effect of the present invention. The outside air is guided from the guide member (air duct) 14 in the direction of the arrow in the drawing. There is a heat source 15a on the rear side of the cover 17, and if the inside of the cover 17 and the member that is easily heated by the heat source can be efficiently cooled, the member will not be overheated. For example, it can be replaced with a material having excellent recycling characteristics. In order to efficiently cool the inside of the cover 17 and the vicinity of the member, it is particularly preferable to apply outside air to the region indicated by S (near the opening end portion 18 on the side surface of the cover) in the drawing. By applying outside air to this region S, the hot air inside the cover 17 is extracted from the opening on the side surface of the cover 17, and the cooling efficiency is improved.

図４は、フロントグリル１１における吸気口１３の形状の一例を示す正面図である。フロントグリル１１には、例えば、同図に示すような矩形の開口が複数設けられて、吸気口１３の役割を果たしている。熱源を冷却するためには吸気口１３が必要であるが、空気抵抗（ＣＤ値）を下げるためには開口面積をできるだけ小さくすることが好ましい。しかし、前記開口が例えば５ｍｍ幅程度の幅狭のスリットであると、スリット通過直後には外気に勢いがあるものの、全体的な風量が少なく、開口から外気がほとんど導風されない。使用するガイド部材（エアダクト）の形状とフロントグリルの吸気口の形状とを、最適な組み合わせとすることで、左右の風量のバランスを好適なものにしたり、所望の位置での風量を確保することができる。矩形の開口の組み合わせによって吸気口とする場合、縦桟２０の幅や位置に依存して導風特性が変化することがある。そのため、縦桟２０の幅、および、縦桟２０の位置とエアダクト１４開口部の位置との関係に留意して、エアダクト１４の設置位置を調整することが好ましい。 FIG. 4 is a front view showing an example of the shape of the intake port 13 in the front grill 11. For example, the front grill 11 is provided with a plurality of rectangular openings as shown in the figure, and serves as an intake port 13. The intake port 13 is required to cool the heat source, but it is preferable to make the opening area as small as possible in order to reduce the air resistance (CD value). However, if the opening is a narrow slit having a width of, for example, about 5 mm, although there is momentum in the outside air immediately after passing through the slit, the overall air volume is small and the outside air is hardly guided from the opening. By optimally combining the shape of the guide member (air duct) to be used and the shape of the intake port of the front grill, the balance between the left and right air volumes can be optimized and the air volume at the desired position can be secured. Can be done. When the intake port is made by combining rectangular openings, the wind guiding characteristics may change depending on the width and position of the vertical rail 20. Therefore, it is preferable to adjust the installation position of the air duct 14 while paying attention to the width of the vertical rail 20 and the relationship between the position of the vertical rail 20 and the position of the opening of the air duct 14.

１０…エンジン本体
１１…フロントグリル（車両前端外装部材）
１２…エンジンルーム
１３…吸気口
１４…エアダクト（ガイド部材）
１５ａ…ターボ（熱源）
１５ｂ…リンクピン
１５ｃ…エキゾーストマニホールド（熱源）
１６…インタークーラー
１７…カバー
１８…カバー側面の開口端部
１９…リブ
２０…縦桟
Ｓ…要冷却領域 10 ... Engine body 11 ... Front grille (vehicle front end exterior member)
12 ... Engine room 13 ... Intake port 14 ... Air duct (guide member)
15a ... Turbo (heat source)
15b ... Link pin 15c ... Exhaust manifold (heat source)
16 ... Intercooler 17 ... Cover 18 ... Open end on the side of the cover 19 ... Rib 20 ... Vertical crosspiece S ... Cooling area required

Claims (1)

エンジンルーム内の熱源を空冷するための冷却構造であって、
車両前端外装部材には前記エンジンルーム内に連通する吸気口が設けられ、
前記吸気口には、前記熱源の方向に導風するためのガイド部材が設けられており、
前記エンジンルーム内には、前記熱源の少なくとも一部を覆うとともに側面に開口部を有するカバーが配設され、
前記ガイド部材は、少なくとも前記カバー側面の開口端部に沿うように外気を導風する構造を有していることを特徴とする車両前部構造。 It is a cooling structure for air-cooling the heat source in the engine room.
The vehicle front end exterior member is provided with an intake port that communicates with the engine compartment.
The intake port is provided with a guide member for guiding air in the direction of the heat source.
In the engine room, a cover that covers at least a part of the heat source and has an opening on the side surface is arranged.
The vehicle front structure is characterized in that the guide member has a structure for guiding outside air at least along the open end portion of the side surface of the cover.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0516678A (en) * 1991-07-09 1993-01-26 Toyota Motor Corp Cooling device for exhaust system
JPH06239148A (en) * 1993-02-17 1994-08-30 Mazda Motor Corp Engine room arranging structure of vehicle
JP2011126301A (en) * 2009-12-15 2011-06-30 Suzuki Motor Corp Cooling device for vehicular engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0516678A (en) * 1991-07-09 1993-01-26 Toyota Motor Corp Cooling device for exhaust system
JPH06239148A (en) * 1993-02-17 1994-08-30 Mazda Motor Corp Engine room arranging structure of vehicle
JP2011126301A (en) * 2009-12-15 2011-06-30 Suzuki Motor Corp Cooling device for vehicular engine

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