JP2020016206A - Internal combustion engine - Google Patents
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- JP2020016206A JP2020016206A JP2018140969A JP2018140969A JP2020016206A JP 2020016206 A JP2020016206 A JP 2020016206A JP 2018140969 A JP2018140969 A JP 2018140969A JP 2018140969 A JP2018140969 A JP 2018140969A JP 2020016206 A JP2020016206 A JP 2020016206A
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Abstract
Description
本発明は、内燃機関に関する。 The present invention relates to an internal combustion engine.
従来、カバーが取り付けられた内燃機関が周知である。特許文献１に開示の内燃機関は、ボルトによって取り付けられたカバーを有している。内燃機関には、ボルトを挿入する挿入孔が設けられている。 2. Description of the Related Art Conventionally, an internal combustion engine provided with a cover is well known. The internal combustion engine disclosed in Patent Literature 1 has a cover attached by bolts. The internal combustion engine is provided with an insertion hole for inserting a bolt.
ところで、カバーを取り付けた状態で、内燃機関の挿入孔とボルトとの間の隙間等に水が滞留すると、水の滞留箇所に腐食が発生するという問題があった。 By the way, if water stays in the gap between the insertion hole and the bolt of the internal combustion engine in a state where the cover is attached, there is a problem that corrosion occurs in the water staying place.
上記課題を解決するための内燃機関は、締結部材によって機関本体に取り付けられるカバーを備え、前記締結部材は、前記カバーの貫通孔を貫通しつつ、その先端部が前記機関本体の挿入孔に挿入されている内燃機関であって、前記カバーは、前記貫通孔を有する底壁と当該底壁の周縁から立設された側壁とを含み、前記機関本体に向かって窪む凹部と、前記機関本体と対向する面に設けられた溝とを備え、前記機関本体が車両に搭載された状態において、前記挿入孔は、前記締結部材の挿入方向の先から基に向かって車両下側に傾斜しており、前記側壁は、前記貫通孔よりも車両下側に位置する部分がその立設方向の基から先に向かって車両下側に傾斜しており、前記溝は、前記貫通孔を介して前記挿入孔及び前記締結部材の間の隙間と連通しつつ、前記貫通孔から車両下側に向かって延びている。 An internal combustion engine for solving the above problem includes a cover attached to the engine body by a fastening member, and the fastening member penetrates a through hole of the cover, and a tip end thereof is inserted into an insertion hole of the engine body. An internal combustion engine, wherein the cover includes a bottom wall having the through hole, and a side wall erected from a peripheral edge of the bottom wall, and a recess recessed toward the engine main body; And a groove provided on a surface facing the vehicle, and in a state in which the engine main body is mounted on the vehicle, the insertion hole is inclined downward from the tip of the fastening member in the insertion direction toward the lower side of the vehicle. In the side wall, a portion located on the lower side of the vehicle with respect to the through hole is inclined toward the lower side of the vehicle from the base in the upright direction, and the groove is formed through the through hole. The gap between the insertion hole and the fastening member And while, extends from the through hole toward the vehicle lower side.
この構成によれば、挿入孔と締結部材との間の隙間に浸入した水を溝に排出することができ、凹部内の水も凹部から排出することができる。したがって、挿入孔と締結部材との間の隙間や凹部に水が滞留しにくくなる。 According to this configuration, the water that has entered the gap between the insertion hole and the fastening member can be discharged to the groove, and the water in the concave portion can also be discharged from the concave portion. Therefore, it is difficult for water to stay in the gap or the concave portion between the insertion hole and the fastening member.
内燃機関の一実施形態について、図１及び図２に従って説明する。各図では、車両前方を「Ｆｒ」、車両後方を「Ｒｒ」、車両前方に向かって車幅方向の右手側を「ＲＨ」、車両前方に向かって車幅方向の左手側を「ＬＨ」、車両上方を「Ｕｐ」、車両下方を「Ｄｗ」としてそれぞれ矢印の向きで示している。前後方向、車幅方向、及び上下方向は、それぞれ直交している。 One embodiment of the internal combustion engine will be described with reference to FIGS. In each of the figures, "Fr" is the front of the vehicle, "Rr" is the rear of the vehicle, "RH" is the right hand side in the vehicle width direction toward the front of the vehicle, "LH" is the left hand side of the vehicle width direction toward the front of the vehicle, The upper part of the vehicle is indicated by “Up” and the lower part of the vehicle is indicated by “Dw” in the directions of the arrows. The front-rear direction, the vehicle width direction, and the vertical direction are orthogonal to each other.
図１に示すように、車両の前方に位置するエンジンルームに搭載される内燃機関１は、機関本体１０を備える。機関本体１０は、機関本体１０の車両前方に配置されている前面１１、車両後方に配置されている後面１２、車幅方向に配置される一対の側面１３、車両上方に配置されている上面１４及び車両下方に配置されている下面１５を備えている。機関本体１０は、車両に搭載された状態で、後面１２が車両の斜め下方向を向くように傾斜している。 As shown in FIG. 1, an internal combustion engine 1 mounted in an engine room located in front of a vehicle includes an engine body 10. The engine main body 10 includes a front surface 11 arranged in front of the vehicle of the engine main body 10, a rear surface 12 arranged in rear of the vehicle, a pair of side surfaces 13 arranged in the vehicle width direction, and an upper surface 14 arranged above the vehicle. And a lower surface 15 arranged below the vehicle. The engine body 10 is tilted such that the rear surface 12 faces obliquely downward of the vehicle when mounted on the vehicle.
機関本体１０の後面１２には、カバー２０が取り付けられている。本例のカバー２０は、機関本体１０で発生する振動や騒音の吸収、遮断、又はこれらの両方を行う。カバー２０は、例えば厚みのある発泡ウレタンからなり、機関本体１０において振動や騒音の発生部分の近傍に取り付けられる。 A cover 20 is attached to the rear surface 12 of the engine body 10. The cover 20 of the present embodiment absorbs and blocks vibration and noise generated in the engine body 10 or performs both of them. The cover 20 is made of, for example, a thick urethane foam, and is attached to the engine body 10 in the vicinity of a portion where vibration and noise are generated.
図１及び図２に示すように、カバー２０は、機関本体１０に複数の締結部材２１によって取り付けられている（図１では３箇所を図示）。締結部材２１は、例えばボルトであることが好ましい。 As shown in FIGS. 1 and 2, the cover 20 is attached to the engine body 10 by a plurality of fastening members 21 (three locations are shown in FIG. 1). The fastening member 21 is preferably, for example, a bolt.
カバー２０には、締結部材２１が取り付けられる部分に、機関本体１０側に向かって窪む凹部２２を備えている。凹部２２は、底壁２３と、底壁２３の周縁から立設された側壁２４を有する。本実施形態の場合、側壁２４は、底壁２３に対して垂直に設けられている。機関本体１０が車両に搭載された状態で、凹部２２の側壁２４は、その立設方向の基から先に向かって車両下側に傾斜している。 The cover 20 has a concave portion 22 that is recessed toward the engine body 10 at a portion where the fastening member 21 is attached. The recess 22 has a bottom wall 23 and side walls 24 erected from the periphery of the bottom wall 23. In the case of the present embodiment, the side wall 24 is provided perpendicular to the bottom wall 23. When the engine main body 10 is mounted on the vehicle, the side wall 24 of the concave portion 22 is inclined downward from the base in the standing direction toward the lower side of the vehicle.
凹部２２の底壁２３には、締結部材２１が貫通する貫通孔２５が設けられている。また、機関本体１０には、締結部材２１が挿入される挿入孔２６が設けられている。挿入孔２６には、締結部材２１（ボルト）に螺合する雌ねじが設けられている。締結部材２１は、カバー２０の貫通孔２５に外方から貫通しつつ機関本体１０の挿入孔２６に挿入される。貫通孔２５及び挿入孔２６は、締結部材２１の挿入方向の先から基へ向かって車両下側に傾斜している。 The bottom wall 23 of the recess 22 is provided with a through hole 25 through which the fastening member 21 passes. Further, the engine body 10 is provided with an insertion hole 26 into which the fastening member 21 is inserted. The insertion hole 26 is provided with a female screw that is screwed into the fastening member 21 (bolt). The fastening member 21 is inserted into the insertion hole 26 of the engine body 10 while penetrating the through hole 25 of the cover 20 from the outside. The through hole 25 and the insertion hole 26 are inclined downward from the tip of the fastening member 21 in the insertion direction toward the base of the vehicle.
カバー２０は、機関本体１０に対向する面に設けられた溝２７を備える。後面１２と溝２７との間には隙間が存在する。溝２７は、その上端が貫通孔２５に車両下側から接続している。溝２７は、貫通孔２５を介して挿入孔２６及び締結部材２１の間の隙間と連通しつつ、貫通孔２５から車両下側へ延びている。また、カバー２０は、機関本体１０に対向する面と機関本体１０との間に空間３０を有している。空間３０は、その車両下側でカバー２０の外部へ開口している。溝２７は、その下端が空間３０に接続している。 The cover 20 includes a groove 27 provided on a surface facing the engine body 10. There is a gap between the rear surface 12 and the groove 27. The upper end of the groove 27 is connected to the through hole 25 from below the vehicle. The groove 27 extends from the through hole 25 to the lower side of the vehicle while communicating with the gap between the insertion hole 26 and the fastening member 21 via the through hole 25. The cover 20 has a space 30 between the surface facing the engine body 10 and the engine body 10. The space 30 is open to the outside of the cover 20 on the lower side of the vehicle. The lower end of the groove 27 is connected to the space 30.
本実施形態の作用効果について説明する。
（１）本実施形態において、機関本体１０が車両に搭載された状態において、挿入孔２６は、締結部材２１の挿入方向の先から基へ向かって傾斜し、溝２７は、挿入孔２６と締結部材２１との間の隙間と貫通孔２５を介して連通しつつ、貫通孔２５から車両下側に向かって延びている。この構成により、挿入孔２６と締結部材２１との間の隙間に侵入した水は、溝２７に排出される。したがって、挿入孔２６と締結部材２１との間の隙間に水が滞留しにくくなる。
The operation and effect of the present embodiment will be described.
(1) In the present embodiment, when the engine body 10 is mounted on a vehicle, the insertion hole 26 is inclined from the tip of the fastening member 21 in the insertion direction toward the base, and the groove 27 is fastened to the insertion hole 26. It extends from the through hole 25 toward the lower side of the vehicle while communicating with the gap between the member 21 and the through hole 25. With this configuration, water that has entered the gap between the insertion hole 26 and the fastening member 21 is discharged to the groove 27. Therefore, water does not easily stay in the gap between the insertion hole 26 and the fastening member 21.
（２）本実施形態において、機関本体１０が車両に搭載された状態において、凹部２２は、その側壁２４のうち貫通孔２５よりも車両下側に位置する部分が、その立設方向の基から先に向かって車両下側に傾斜している。この構成により、挿入孔２６と締結部材２１との間の隙間に浸入した水が貫通孔２５を通じて凹部２２にした場合にも、凹部２２内の水は、貫通孔２５下側に位置する側壁２４の傾斜に従って、凹部２２の外へ排出される。したがって、凹部２２に水が滞留しにくくなる。 (2) In the present embodiment, when the engine main body 10 is mounted on the vehicle, the portion of the side wall 24 of the recess 22 located below the through hole 25 in the vehicle is viewed from the base in the upright direction. The vehicle is inclined downward toward the front. With this configuration, even when the water that has entered the gap between the insertion hole 26 and the fastening member 21 is made into the recess 22 through the through hole 25, the water in the recess 22 is removed by the side wall 24 located below the through hole 25. Is discharged out of the concave portion 22 according to the inclination of. Therefore, water is less likely to stay in the recess 22.
（３）本実施形態において、溝２７は、その下端で空間３０に接続する構成とした。この構成により、溝２７に侵入した水は、空間３０へ排出され、さらに空間３０の開口よりカバー２０の外部へ排出される。したがって、溝２７に水が滞留しにくくなる。 (3) In the present embodiment, the groove 27 is configured to be connected to the space 30 at its lower end. With this configuration, the water that has entered the groove 27 is discharged to the space 30 and further discharged from the opening of the space 30 to the outside of the cover 20. Therefore, water does not easily stay in the groove 27.
なお、本実施形態は、以下のように変更して実施することができる。本実施形態及び以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。
・本実施形態において、凹部２２において底壁２３に対して側壁２４は、垂直に立設する態様としたが、これに限定されない。例えば、他の態様について、図３を用いて説明する。
The present embodiment can be modified and implemented as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
In the present embodiment, the side wall 24 stands upright with respect to the bottom wall 23 in the recess 22. However, the present invention is not limited to this. For example, another embodiment will be described with reference to FIG.
図３に示すように、側壁２４は、その立設方向の基から先に向かって、凹部２２内の空間が広がるように底壁２３に対して傾斜している。この場合でも、側壁２４のうち貫通孔より車両下側の部分は、立設方向の基から先に向かって車両下側へ傾斜している。そのため、凹部２２に水が滞留しにくくなる。すなわち、凹部２２内に水が滞留しないように、側壁２４のうち貫通孔２５よりも車両下側に位置する部分が、その立設方向の基から先に向かって車両下側に傾斜していればよい。 As shown in FIG. 3, the side wall 24 is inclined with respect to the bottom wall 23 so that the space inside the concave portion 22 is widened from the base in the upright direction. Also in this case, the portion of the side wall 24 below the through hole is inclined downward from the base in the upright direction toward the vehicle bottom. Therefore, water does not easily stay in the concave portion 22. That is, the portion of the side wall 24 located below the through-hole 25 in the side wall 24 is inclined downward toward the vehicle from the base in the standing direction so that water does not stay in the recess 22. I just need.
・本実施形態において、溝２７は、貫通孔２５を介して挿入孔２６と連通しつつ、貫通孔２５から車両下側へ延びていればよく、溝２７の大きさや形状は、特に限定されない。また、溝２７の下端が空間３０に接続していることは、構成要素から省略可能である。すなわち、挿入孔２６と締結部材２１との間の隙間に浸入した水を、少なくとも溝２７に排出できればよい。ただし、溝２７に水を排出するにあたって、溝２７の下端が空間３０に接続していることで溝２７に水が滞留しにくくなる。なお、空間３０の形状は、特に限定されない。 In the present embodiment, the size and shape of the groove 27 are not particularly limited as long as the groove 27 extends from the through hole 25 to the lower side of the vehicle while communicating with the insertion hole 26 via the through hole 25. The connection of the lower end of the groove 27 to the space 30 can be omitted from the components. That is, it is sufficient that the water that has entered the gap between the insertion hole 26 and the fastening member 21 can be discharged at least to the groove 27. However, when discharging the water into the groove 27, the lower end of the groove 27 is connected to the space 30, so that the water does not easily stay in the groove 27. The shape of the space 30 is not particularly limited.
・本実施形態において、締結部材２１はボルトに限定されない。例えばクリップなどを適用できる。
・本実施形態において、カバー２０の材質は発泡ウレタンに限定されない。例えば、繊維状プラスチックなどの他の吸音材及び遮音材を用いてもよい。また、カバー２０の外方に化粧カバーを有していてもよい。
-In this embodiment, the fastening member 21 is not limited to a bolt. For example, a clip or the like can be applied.
-In this embodiment, the material of the cover 20 is not limited to urethane foam. For example, other sound absorbing materials and sound insulating materials such as fibrous plastics may be used. Further, a decorative cover may be provided outside the cover 20.
・本実施形態において、機関本体１０において、カバー２０の取付位置は、特に限定されない。例えば、カバー２０の取付位置は、前面１１、側面１３、上面１４、及び下面１５でもよい。また、機関本体１０には、例えばオイルパン、クランクケース、シリンダブロック、シリンダヘッド、トランスミッションケース及びチェーンケースなどの部材が含まれる。 In the present embodiment, the mounting position of the cover 20 in the engine body 10 is not particularly limited. For example, the mounting position of the cover 20 may be the front surface 11, the side surface 13, the upper surface 14, and the lower surface 15. The engine body 10 includes, for example, members such as an oil pan, a crankcase, a cylinder block, a cylinder head, a transmission case, and a chain case.
・本実施形態において、カバー２０は、振動や騒音を吸収又は遮断するものに限定されない。機関本体１０に取り付けられるカバーであれば、審美性を高めるための化粧カバーなど、どのような機能を有するものでもよい。 -In this embodiment, cover 20 is not limited to a thing which absorbs or blocks vibration and noise. As long as the cover can be attached to the engine body 10, any function having a function such as a decorative cover for enhancing aesthetics may be used.
１…内燃機関、１０…機関本体、２０…カバー、２１…締結部材、２２…凹部、２３…底壁、２４…側壁、２５…貫通孔、２６…挿入孔、２７…溝、３０…空間。 DESCRIPTION OF SYMBOLS 1 ... Internal combustion engine, 10 ... Engine main body, 20 ... Cover, 21 ... Fastening member, 22 ... Concave part, 23 ... Bottom wall, 24 ... Side wall, 25 ... Through hole, 26 ... Insertion hole, 27 ... Groove, 30 ... Space.
Claims (1)
前記カバーは、
前記貫通孔を有する底壁と当該底壁の周縁から立設された側壁とを含み、前記機関本体に向かって窪む凹部と、
前記機関本体と対向する面に設けられた溝とを備え、
前記機関本体が車両に搭載された状態において、
前記挿入孔は、前記締結部材の挿入方向の先から基に向かって車両下側に傾斜しており、
前記側壁は、前記貫通孔よりも車両下側に位置する部分がその立設方向の基から先に向かって車両下側に傾斜しており、
前記溝は、前記貫通孔を介して前記挿入孔及び前記締結部材の間の隙間と連通しつつ、前記貫通孔から車両下側に向かって延びている内燃機関。
An internal combustion engine including a cover attached to the engine body by a fastening member, wherein the fastening member penetrates a through hole of the cover, and a tip end thereof is inserted into an insertion hole of the engine body,
The cover,
A recess including a bottom wall having the through-hole and a side wall erected from the periphery of the bottom wall, and recessed toward the engine body;
A groove provided on a surface facing the engine body,
In a state where the engine body is mounted on a vehicle,
The insertion hole is inclined downward from the tip of the fastening member in the insertion direction toward the bottom of the vehicle,
In the side wall, a portion located below the vehicle with respect to the through hole is inclined downward from the base in the standing direction toward the vehicle lower side,
The internal combustion engine extends from the through hole toward a lower side of the vehicle while communicating with the gap between the insertion hole and the fastening member via the through hole.
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| JP2018140969A JP7004170B2 (en) | 2018-07-27 | 2018-07-27 | Internal combustion engine |
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| JP2018140969A JP7004170B2 (en) | 2018-07-27 | 2018-07-27 | Internal combustion engine |
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| JPH03249332A (en) * | 1990-02-27 | 1991-11-07 | Suzuki Motor Corp | Engine unit of motorcycle |
| JPH04128065U (en) * | 1991-05-08 | 1992-11-20 | 株式会社三ツ葉電機製作所 | Drainage structure of through-bolt penetration part in motor casing |
| JP2000234526A (en) * | 1999-02-15 | 2000-08-29 | Toyota Motor Corp | Cover for vibrating member |
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