JP2015190443A - Heat shield cover for exhaust manifold of vehicle internal combustion engine - Google Patents

Heat shield cover for exhaust manifold of vehicle internal combustion engine Download PDF

Info

Publication number
JP2015190443A
JP2015190443A JP2014070385A JP2014070385A JP2015190443A JP 2015190443 A JP2015190443 A JP 2015190443A JP 2014070385 A JP2014070385 A JP 2014070385A JP 2014070385 A JP2014070385 A JP 2014070385A JP 2015190443 A JP2015190443 A JP 2015190443A
Authority
JP
Japan
Prior art keywords
surface portion
exhaust manifold
heat shield
shield cover
cover
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
Application number
JP2014070385A
Other languages
Japanese (ja)
Other versions
JP6355191B2 (en
Inventor
晋 茂内
Shin Shigeuchi
晋 茂内
坪井　宏充
Hiromitsu Tsuboi
宏充 坪井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daihatsu Motor Co Ltd
Original Assignee
Daihatsu Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daihatsu Motor Co Ltd filed Critical Daihatsu Motor Co Ltd
Priority to JP2014070385A priority Critical patent/JP6355191B2/en
Publication of JP2015190443A publication Critical patent/JP2015190443A/en
Application granted granted Critical
Publication of JP6355191B2 publication Critical patent/JP6355191B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Exhaust Silencers (AREA)

Abstract

PROBLEM TO BE SOLVED: To suppress heat of an exhaust manifold from being transferred into a cabin via a partition wall of a vehicle even if an engine body is disposed to be proximate to the partition wall.SOLUTION: An exhaust manifold 14 is covered with a heat shield cover 20. The heat shield cover 20 includes an upper surface portion 21, an outer surface portion 22 and a lower surface portion 23, and a rear part 21a of the upper surface portion 21 is tilted backward and the lower surface portion 23 is entirely tilted backward in a side view. An upper connecting portion 29 connecting the upper surface portion 21 to the outer surface portion 22 is gently curved whereas a lower connecting portion 30 connecting the lower surface portion 23 to the outer surface portion 22 is curved into a state of being nearly bent. Travel air in the direction of the lower surface portion 23 is guided downward and travel air in the direction of the upper surface portion 21 is guided downward by the upper connecting portion 29. The travel air heated by the heat shield cover 20 can be guided downward to be promptly discharged to vehicle outside. It it, therefore, possible to reduce heat transferred into a cabin via a partition wall.

Description

本願発明は、車両に搭載される縦置き型内燃機関の排気マニホールドを覆う遮熱カバー（インシュレータ）に関するものである。   The present invention relates to a heat insulating cover (insulator) that covers an exhaust manifold of a vertical internal combustion engine mounted on a vehicle.

内燃機関の排気マニホールドは排気ガスによって高い温度になるため、他の部材の保護等のために金属板製の遮熱カバーで覆うことが行われている。他方、内燃機関を車両のエンジンルームに搭載する場合、クランク軸が車両の前後方向に向くように配置する縦置きと、クランク軸が車両の左右方向に向くように配置する横置きとがあり、縦置き式の内燃機関における排気マニホールド用遮熱カバーとして特許文献１には、遮熱カバーを側面視で水平姿勢に配置して、走行風を前面から外面に導く構成が開示されている。   Since the exhaust manifold of an internal combustion engine is heated to a high temperature by the exhaust gas, it is covered with a heat shield cover made of a metal plate to protect other members. On the other hand, when the internal combustion engine is mounted in the engine room of the vehicle, there are a vertical placement in which the crankshaft is oriented in the front-rear direction of the vehicle and a horizontal placement in which the crankshaft is oriented in the left-right direction of the vehicle, As a heat shield cover for an exhaust manifold in a vertically installed internal combustion engine, Patent Document 1 discloses a configuration in which a heat shield cover is disposed in a horizontal position in a side view and guides traveling wind from the front surface to the outer surface.

特開２０１３−３６４２７号公報JP 2013-36427 A

さて、車両用内燃機関の搭載位置はエンジンルームの広さや内燃機関の大きさ等によってまちまちであり、機関本体をエンジンルームの後部に配置せねばならない場合もある。すると、機関本体がエンジンルームと車内とを仕切る隔壁に近づくため、排気マニホールドの熱が隔壁を介して車内に伝わって、車内が熱害を受けやすくなることがある。   Now, the mounting position of the vehicle internal combustion engine varies depending on the size of the engine room, the size of the internal combustion engine, and the like, and it may be necessary to arrange the engine body at the rear of the engine room. Then, since the engine body approaches the partition wall that partitions the engine room and the vehicle interior, the heat of the exhaust manifold is transmitted to the vehicle interior through the partition wall, and the interior of the vehicle may be easily damaged by heat.

特に、縦置き型の内燃機関では走行風によって熱気が隔壁に送られるため、熱害の問題が顕著に現れる。しかるに、特許文献１の場合は、走行風を単に遮熱カバーに当てるに過ぎず、遮熱カバーによって受熱した走行風はそのまま隔壁に衝突するため、車内の熱害防止にはなんら貢献していないと云える。   In particular, in a vertically installed internal combustion engine, hot air is sent to the partition wall by the traveling wind, so the problem of heat damage appears remarkably. However, in the case of Patent Document 1, the traveling wind is merely applied to the heat shield cover, and the traveling wind received by the heat shield cover directly collides with the partition wall, so it does not contribute to the prevention of heat damage in the vehicle. It can be said.

本願発明は、このような現状を改善すべく成されたものである。   The present invention has been made to improve the current situation.

本願発明は、排気マニホールドを固定した長手一側面が車両の前後方向に長手となるように配置されたシリンダヘッドの前記長手一側面に固定されて前記排気マニホールドを外側から覆う遮熱カバーに関する。   The present invention relates to a heat shield cover that is fixed to the one longitudinal side surface of a cylinder head that is disposed so that one longitudinal side surface to which an exhaust manifold is fixed is longitudinal in the vehicle longitudinal direction and covers the exhaust manifold from the outside.

本願発明は、上記の遮熱カバーに関して多くの構成を有しており、その典型を各請求項で特定している。このうち請求項１の発明に係る遮熱カバーは、前記排気マニホールドを外側から覆うように上面部と外面部と下面部とを有して正面視で外向き突状に膨らんだ形状であり、前記下面部を後ろに行くほど下がるように傾斜させている。   The present invention has many configurations related to the above-described heat shield cover, and typical examples thereof are specified in the respective claims. Of these, the heat shield cover according to the invention of claim 1 has an upper surface portion, an outer surface portion, and a lower surface portion so as to cover the exhaust manifold from the outside, and has a shape bulging outwardly in a front view, The lower surface portion is inclined so as to be lowered toward the rear.

請求項２の発明に係る遮熱カバーは、前記排気マニホールドを外側から覆うように上面部と外面部と下面部とを有して正面視で外向き突状に膨らんだ形状であり、前記上面部は、側面視で上向き凸状でかつ前端よりも後端が低くなるように緩く湾曲している。   The heat shield cover according to the invention of claim 2 has an upper surface portion, an outer surface portion, and a lower surface portion so as to cover the exhaust manifold from the outside, and has a shape bulging outwardly in a front view, The portion is convex upward in a side view and is gently curved so that the rear end is lower than the front end.

請求項３の発明に係る遮熱カバーは、請求項１又は２において、前記上面部と外面部とを繋ぐ上側連接部は略全長に亙って緩く湾曲している一方、前記下面部と外面部とを繋ぐ
下側連接部のうち少なくとも一部が、前記上側連接部よりも急激に曲がっている。 According to a third aspect of the present invention, there is provided the heat shield cover according to the first or second aspect, wherein the upper connecting portion connecting the upper surface portion and the outer surface portion is gently curved over substantially the entire length, while the lower surface portion and the outer surface. At least a part of the lower connecting portion connecting the portions is bent more rapidly than the upper connecting portion.

請求項１の発明と請求項２の発明とを対立し合うものではなく、両者を組み合わせるのは好ましいことである。また、遮熱カバーの前部は、平面視でシリンダヘッドからの距離が徐々に大きくなるように傾斜又は湾曲させることが可能であり、これにより、走行風が遮熱カバーの外面部に当たる割合を大きくできる。   The invention of claim 1 and the invention of claim 2 are not opposed to each other, and it is preferable to combine the two. In addition, the front part of the heat shield cover can be inclined or curved so that the distance from the cylinder head gradually increases in a plan view, so that the rate at which the traveling wind hits the outer surface part of the heat shield cover can be increased. Can be big.

請求項１の発明では、機関本体を隔壁に近付けて配置していても、遮熱カバーの下面部が傾斜していることにより、走行風を斜め下向きにガイドして、エンジンルームの床下に速やかに逃がすことができる。これにより、下面部で受熱した走行風が車両の隔壁に直接に衝突することを抑制して、車内の熱害を抑制できる。また、下面部が傾斜していることで、下面部に当てる風量を増大できるため、下面部の冷却効果も向上できる。   In the first aspect of the invention, even if the engine body is disposed close to the partition wall, the lower surface portion of the heat shield cover is inclined, so that the traveling wind is guided obliquely downward and quickly under the floor of the engine room. Can escape. Thereby, it can suppress that the driving | running | working wind received by the lower surface part collides directly with the partition of a vehicle, and can suppress the heat damage in a vehicle. Further, since the lower surface portion is inclined, the amount of air applied to the lower surface portion can be increased, so that the cooling effect of the lower surface portion can also be improved.

更に、遮熱カバーの下面部に多くの走行風が当たることで、下面部の下方において走行風の流速が速くなるため、遮熱カバーの後ろ側では負圧気味となって下向きに引かれる傾向を呈することになり、その結果、遮熱カバーの上を流れてきた走行風を下向きに引き込んで車外に逃がすことができる。この面からも、遮熱カバーの熱が走行風を介して隔壁に伝わることを抑制して、車内に熱害が及ぶことを抑制できる。   Furthermore, since a lot of traveling wind hits the lower surface of the heat shield cover, the flow speed of the traveling wind is increased below the lower surface, so that the rear side of the heat shield cover tends to be pulled downward due to negative pressure. As a result, the traveling wind that has flowed over the heat shield cover can be drawn downward to escape outside the vehicle. Also from this surface, it is possible to suppress the heat of the heat shield cover from being transmitted to the partition via the traveling wind, and to suppress the heat damage in the vehicle.

請求項２の構成では、下面部の上面部と外面部との連接部が緩く湾曲していることにより、上面部を流れる走行風は外面部を舐めるような状態で下向きに風向を変えていく傾向を呈するため、外面部の冷却性も向上できる。   In the structure of Claim 2, the connection part of the upper surface part of a lower surface part and an outer surface part is curving loosely, and the running wind which flows through an upper surface part changes a wind direction in the state which licks an outer surface part. Since the tendency is exhibited, the cooling performance of the outer surface portion can also be improved.

更に、上面部は前端部よりも後端部が低くなっているが、走行風が外面部に沿って下向きに流れる傾向を呈することから、上面部を流れる走行風は遮熱カバーの後端に至っても下向きに引かれる作用を受けるため、上面部を流れる走行風の風向を下向きに変えて床下に逃がすことをスムースに行える。   Furthermore, the rear surface of the upper surface portion is lower than the front edge portion, but the traveling wind tends to flow downward along the outer surface portion. Even if it reaches the bottom, it receives the action of being pulled downward, so that the direction of the traveling wind flowing through the upper surface can be changed downward to allow it to escape smoothly under the floor.

従って、請求項２の発明においても、遮熱カバーの冷却性を向上できるのみならず、遮熱カバーで受熱した走行風を下向きにスムースに逃がすことができるため、機関本体を隔壁に近付けて配置していても、車内に熱害が及ぶことを抑制できる。   Therefore, in the invention of claim 2 as well, not only can the cooling performance of the heat shield cover be improved, but also the traveling wind received by the heat shield cover can be smoothly released downward, so the engine body is arranged close to the partition wall. Even if it does, it can suppress that a heat damage reaches the inside of a vehicle.

請求項３の構成を採用すると、遮熱カバーの下面部を流れる走行風が上に逃げることを防止できるため、走行風が全体として下向きに流れることを確実化できる。その結果、走行風を下向きに誘導してエンジンルームの外に排出することが、より確実になる。   If the structure of Claim 3 is employ | adopted, since the running wind which flows through the lower surface part of a thermal insulation cover can be prevented from escaping upward, it can be ensured that a running wind flows downward as a whole. As a result, the traveling wind is more reliably guided downward and discharged out of the engine room.

（Ａ）は実施形態の概略側面図、（Ｂ）は機関本体の概略正面図である。(A) is a schematic side view of an embodiment, and (B) is a schematic front view of an engine body. 排気マニホールド及び触媒ケースと遮熱カバーとの分離側面図である。It is a separation side view of an exhaust manifold, a catalyst case, and a heat shield cover. （Ａ）は排気マニホールド及び触媒ケースと遮熱カバーとの分離平面図、（Ｂ）は遮熱カバーの断面図である。(A) is a separated plan view of the exhaust manifold and the catalyst case and the heat shield cover, and (B) is a sectional view of the heat shield cover. （Ａ）は図１の要部拡大図、（Ｂ）は遮熱カバーの正面図である。(A) is a principal part enlarged view of FIG. 1, (B) is a front view of a thermal-insulation cover. （Ａ）は図４（Ａ）の VA-VA視断面図、（Ｂ）は遮熱カバーのみを表示した図４（Ａ）の VB-VB視断面図である。4A is a cross-sectional view taken along the line VA-VA in FIG. 4A, and FIG. 4B is a cross-sectional view taken along the line VB-VB in FIG.

(1).概要
次に、本願発明の実施形態を図面に基づいて説明する。まず、図１，２に基づいて概要を説明する。図１（Ａ）では車両において隔壁１で仕切られた室内２とエンジンルーム３とを表示しており、エンジンルーム３に機関本体４が配置されている。 (1). Outline Next, an embodiment of the present invention will be described with reference to the drawings. First, an outline will be described based on FIGS. FIG. 1A shows a room 2 and an engine room 3 partitioned by a partition wall 1 in the vehicle, and an engine body 4 is arranged in the engine room 3.

機関本体４は、シリンダブロック５とその上面に固定されたシリンダヘッド６とを有しており、シリンダヘッド６の上面にはシリンダヘッドカバー７が固定されて、シリンダブロック５の下面にはオイルパン８が固定されている。シリンダブロック５は、その下部に設けたマウント装置９を介して車体フレーム１０に支持されている。なお、マウント装置９は防振ゴムを備えている。   The engine body 4 includes a cylinder block 5 and a cylinder head 6 fixed to the upper surface thereof. A cylinder head cover 7 is fixed to the upper surface of the cylinder head 6, and an oil pan 8 is attached to the lower surface of the cylinder block 5. Is fixed. The cylinder block 5 is supported by the vehicle body frame 10 via a mounting device 9 provided in the lower part thereof. The mount device 9 is provided with a vibration proof rubber.

本実施形態の機関本体４は、クランク軸線１１が車両の前後方向を向いた姿勢で配置しており、かつ、シリンダボア軸線１２を鉛直線１３に対して若干の角度θだけ傾斜させている。すなわち、機関本体４はスラント型になっている。従って、シリンダヘッド６は、その長手一側面６ａが下側に傾いて、長手他側面６ｂが上側に傾いている。   The engine body 4 of the present embodiment is arranged in a posture in which the crank axis 11 is directed in the front-rear direction of the vehicle, and the cylinder bore axis 12 is inclined with respect to the vertical line 13 by a slight angle θ. That is, the engine body 4 is a slant type. Accordingly, the cylinder head 6 has one longitudinal side surface 6a inclined downward and the other longitudinal side surface 6b inclined upward.

そして、シリンダヘッド６の両長手側面６ａ，６ｂのうち下向きの長手一側面６ａに、排気ポート（図示せず）を開口させると共に排気マニホールド１４を固定しており、シリンダヘッド６の長手他側面６ｂには、吸気ポートが開口して吸気マニホールド（図示せず）が固定されている。なお、排気マニホールド１４の下方にマウント装置９が配置されている。   An exhaust port (not shown) is opened on one of the longitudinal side surfaces 6a and 6b of the cylinder head 6 and the exhaust manifold 14 is fixed to the longitudinal side surface 6a. The intake port is opened and an intake manifold (not shown) is fixed. A mount device 9 is disposed below the exhaust manifold 14.

本実施形態の内燃機関は４気筒タイプであり、そこで、図２に示すように、排気マニホールド１４は、４つの枝管１４ａとこれらが集まった集合管１４ｂとを有しており、集合管１４ｂの終端には触媒ケース１５が接続されている。触媒ケース１５には排気管１６が接続されており、排気管１６は車両の床下を通って後ろに延びている。   The internal combustion engine of the present embodiment is a four-cylinder type. Therefore, as shown in FIG. 2, the exhaust manifold 14 has four branch pipes 14a and a collecting pipe 14b in which these are collected, and the collecting pipe 14b. A catalyst case 15 is connected to the end of the. An exhaust pipe 16 is connected to the catalyst case 15, and the exhaust pipe 16 extends rearward under the floor of the vehicle.

車内１のうちその前端部でかつ床に近い部位には、アクセルペダル１７を配置している。本実施形態の車両は左ハンドルタイプであり、このため、機関本体４の後ろのあたりにアクセルペダル１７が位置しており、かつ、機関本体４は隔壁１にかなり近付けて配置されている。そして、排気マニホールド１４は、遮熱カバー２０で外側から覆われている。この点を、図３以下の図面も参照して説明する。   An accelerator pedal 17 is arranged at a front end portion of the vehicle interior 1 and close to the floor. The vehicle of the present embodiment is a left-hand drive type. For this reason, the accelerator pedal 17 is located behind the engine body 4, and the engine body 4 is arranged quite close to the partition wall 1. The exhaust manifold 14 is covered with a heat shield cover 20 from the outside. This point will be described with reference to FIG. 3 and subsequent drawings.

(2).遮熱カバーの詳細
遮熱カバー２０は前後方向に長い形態であり、排気マニホールド１４を外側から覆うように上面部２１と外面部２２と下面部２３とを有しており、正面視で外向き突状に膨らんだ形状になっている。また、遮熱カバー２０は、上面部２１と外面部２２と下面部２３とに連続した前面部２４も有しているが、後端は後ろ向きに開口している。 (2) Details of heat shield cover The heat shield cover 20 is long in the front-rear direction, and has an upper surface portion 21, an outer surface portion 22, and a lower surface portion 23 so as to cover the exhaust manifold 14 from the outside. It has a shape that bulges outwardly as viewed. The heat insulating cover 20 also has a front surface portion 24 continuous with the upper surface portion 21, the outer surface portion 22, and the lower surface portion 23, but the rear end is opened rearward.

また、上面部２１と下面部２３とにはシリンダヘッド６の長手側面６ａと略平行なフランジ２５が一体に繋がっており、図５（Ａ）に示すように、排気マニホールド１４から外向きに立ち上げた張り出し部２６にフランジ２５がボルト２７及びナット２８で締結されている。   Further, a flange 25 substantially parallel to the longitudinal side surface 6a of the cylinder head 6 is integrally connected to the upper surface portion 21 and the lower surface portion 23, and as shown in FIG. The flange 25 is fastened to the raised projecting portion 26 with bolts 27 and nuts 28.

遮熱カバー２０は、前部よりも後部の上下幅が大きくなるように、大まかには後ろに行くに従って上下幅寸法が大きくなっている。そして、上面部２１は、側面視で若干の上向き凸状に緩い湾曲しており、後端は前端よりも低くなっている。上面部２１の後部２１ａは前端よりも低くて緩く後傾しており、後部２１ａを除いた部分はかなり水平に近い程度で湾曲している。   The heat shield cover 20 has a generally larger vertical dimension as it goes rearward so that the vertical width of the rear part is larger than the front part. And the upper surface part 21 is slightly curved in a slightly upward convex shape in a side view, and the rear end is lower than the front end. The rear portion 21a of the upper surface portion 21 is lower than the front end and is gently inclined backward, and the portion excluding the rear portion 21a is curved to a level that is substantially horizontal.

外面部２２は正面視で外向き凸状にごく緩く湾曲しており、上面部２１と外面部２２と
が繋がっている上側連接部２９は、図５（Ａ）（Ｂ）に示すように、略全長にわたって緩く湾曲している。換言すると、上面部２１と外面部２２とは、大きなカーブで滑らかに連続している。 As shown in FIGS. 5 (A) and 5 (B), the outer surface portion 22 is curved very loosely in an outwardly convex shape in a front view, and the upper connecting portion 29 where the upper surface portion 21 and the outer surface portion 22 are connected is as shown in FIGS. It is gently curved over almost the entire length. In other words, the upper surface portion 21 and the outer surface portion 22 are smoothly continuous with a large curve.

遮熱カバー２０の上面部２１と下面部２３とは、外面部２２に近づくに従って間隔が僅かに狭くなるように設定されており、下面部２３と外面部２２とが繋がっている下側連接部３０は、図５（Ｂ）に示すように、上側連接部２９よりも小さい曲がりになっている。すなわち、上側連接部２９は大きく湾曲した形状であるのに対して、下側連接部３０は屈曲に近い曲がり形状になっている。更に換言すると、上側連接部２９及び下側連接部３０を円弧と過程すると、下側連接部３０の曲率半径が上側連接部２９の曲率半径よりもかなり小さくなっている。   The upper surface portion 21 and the lower surface portion 23 of the heat shield cover 20 are set so that the interval is slightly narrowed as the outer surface portion 22 is approached, and the lower connecting portion where the lower surface portion 23 and the outer surface portion 22 are connected. As shown in FIG. 5B, 30 is a smaller bend than the upper connecting portion 29. That is, the upper connecting portion 29 has a greatly curved shape, while the lower connecting portion 30 has a bent shape close to bending. In other words, when the upper connecting portion 29 and the lower connecting portion 30 are formed into a circular arc, the curvature radius of the lower connecting portion 30 is considerably smaller than the curvature radius of the upper connecting portion 29.

本実施形態の機関本体４は排気側の長手側面６ａが下向きとなるように傾斜しているので、図５に示すように、遮熱カバー２０の上面部２１及び下面部２３とも、シリンダヘッド６から離れるほど下がるように水平面に対して傾斜している。図５（Ａ）のとおり、外面部２２のうち前部は正断面視で円弧状に近い形態になっている。   Since the engine main body 4 of the present embodiment is inclined so that the longitudinal side surface 6a on the exhaust side faces downward, as shown in FIG. 5, both the upper surface portion 21 and the lower surface portion 23 of the heat shield cover 20 are in the cylinder head 6. It is inclined with respect to the horizontal plane so that it falls as it gets away from it. As shown in FIG. 5A, the front portion of the outer surface portion 22 has a shape close to an arc shape in a front sectional view.

遮熱カバー２０には、前部に位置した３条のフロントガイドリブ３１と、後部に位置した２条のリアガイドリブ３２とを外向きに突設している。両ガイドリブ３１，３２は前後方向に長手であり、フロントガイドリブ３１は側面視においておおよそ水平姿勢で、リアガイドリブ３２は側面視において水平に対して後傾している。リアガイドリブ３２は、側面視で下面部２３と略平行になっている。   The heat shield cover 20 is provided with three front guide ribs 31 located at the front and two rear guide ribs 32 located at the rear protruding outward. Both guide ribs 31 and 32 are long in the front-rear direction, the front guide rib 31 is in a substantially horizontal posture in a side view, and the rear guide rib 32 is inclined rearward with respect to the horizontal in a side view. The rear guide rib 32 is substantially parallel to the lower surface portion 23 in a side view.

外面部２２のうちやや前寄りの部位には、空気流入穴３３を空けている。空気流入穴３３は外面部２２の上下中間部に設けており、シリンダヘッド６と略平行な段部３４に空けている。従って、走行風が過度に流入することはない。   An air inflow hole 33 is formed in a part of the outer surface portion 22 slightly forward. The air inflow hole 33 is provided in an upper and lower intermediate portion of the outer surface portion 22 and is formed in a step portion 34 substantially parallel to the cylinder head 6. Therefore, the traveling wind does not flow excessively.

遮熱カバー２０の後端は、略過半部が手前に逃げるようにカットされているが、これは、触媒ケース１５との干渉を回避するためである。触媒ケース１５も、略半周程度が外側からケースカバー３５で覆われている。図３に示すように、遮熱カバー２０の外面部２２は、先端から後端に向けて外向き高さが高くなるように平面視で曲がっており、かつ、前部において大きく曲がっている。   The rear end of the heat shield cover 20 is cut so that a substantially majority part escapes to the front, but this is to avoid interference with the catalyst case 15. The catalyst case 15 is also covered with a case cover 35 from the outside in about a half circumference. As shown in FIG. 3, the outer surface portion 22 of the heat shield cover 20 is bent in a plan view so that the outward height increases from the front end toward the rear end, and is greatly bent at the front portion.

(3).まとめ
以上の構成において、車両の走行によって遮熱カバー２０には走行風が当たるが、遮熱カバー２０の下面部２３が後傾しているため、走行風を斜め下向きに向かわせるようにガイドして、走行風をエンジンルームの下方（車外）に速やかに逃がすことができる。これにより、遮熱カバー２０の下面部２３で受熱した走行風が車両の隔壁１に強く当たることを抑制して、車内１が熱害を受けることを抑制できる。 (3) Summary In the configuration described above, the traveling wind hits the heat shield cover 20 by traveling of the vehicle, but the lower surface portion 23 of the heat shield cover 20 is tilted backward, so that the traveling wind is directed obliquely downward. Thus, the traveling wind can be quickly released to the lower side of the engine room (outside the vehicle). Thereby, it can suppress that the driving | running | working wind received with the lower surface part 23 of the thermal insulation cover 20 hits against the partition 1 of a vehicle strongly, and can suppress that the vehicle interior 1 receives a heat damage.

本願発明のように遮熱カバー２０の後ろに触媒ケース１５を配置していると、遮熱カバー２０によって下向きにガイドされた走行風は、触媒ケース１５及びケースカバー３５を舐めるようにして下方に向かって車外に放出されるため、触媒ケース１５の冷却性も向上できる。その結果、車内１が触媒ケース１５の熱害を受けることも抑制できる。   When the catalyst case 15 is arranged behind the heat shield cover 20 as in the present invention, the traveling wind guided downward by the heat shield cover 20 causes the catalyst case 15 and the case cover 35 to lick and move downward. Since the catalyst case 15 is discharged toward the outside, the cooling performance of the catalyst case 15 can be improved. As a result, the inside of the vehicle 1 can be prevented from being damaged by the catalyst case 15.

また、下面部２３が傾斜していることで、下面部２３に当たる走行風量を増大して遮熱カバー２０の冷却性を向上できるのみならず、下面部２３の終端部において走行風が集まることで下方や触媒ケース１５に向かう走行風の流速は速くなっている。このため、触媒ケース１５の冷却性を一層向上できる。   In addition, since the lower surface portion 23 is inclined, not only can the traveling air volume hitting the lower surface portion 23 be increased to improve the cooling performance of the heat shield cover 20, but also the traveling air is collected at the terminal portion of the lower surface portion 23. The flow velocity of the traveling wind toward the lower side and the catalyst case 15 is increased. For this reason, the cooling performance of the catalyst case 15 can be further improved.

また、上側連連接部２９は緩く湾曲しているため、上面部２１に沿って流れる走行走行風は図４（Ａ）に矢印で示すように下向きに流れるようにガイドされる。このため、外面部２２の冷却性をアップできるのみならず、外面部２２に沿って下向きに流れる走行風が下面部２３によって下向きに導かれた走行風と合流することで、下向きに流れる走行風の勢いは一層強くなり、触媒ケース１５の冷却性を向上できると共に、受熱した走行風の抜け性も向上する。   Further, since the upper connecting portion 29 is gently curved, the traveling traveling wind flowing along the upper surface portion 21 is guided so as to flow downward as indicated by an arrow in FIG. For this reason, not only can the cooling performance of the outer surface portion 22 be improved, but also the traveling wind that flows downward along the outer surface portion 22 merges with the traveling wind guided downward by the lower surface portion 23, thereby causing the traveling wind to flow downward. This momentum becomes stronger, so that the cooling performance of the catalyst case 15 can be improved and the ability to remove the received traveling wind is also improved.

更に、上面部２１に沿って流れる走行風が下向きにガイドされることにより、上面部２１の後部に至った走行風も、外面部２２に沿って下向きに流れる走行風と一緒に下方に向かうことになり、このため、上面部２１に沿って流れる走行風はその全体がごくスムースに下向きに方向変換する。   Furthermore, the traveling wind that flows along the upper surface portion 21 is guided downward, so that the traveling wind that reaches the rear portion of the upper surface portion 21 also moves downward along with the traveling wind that flows downward along the outer surface portion 22. For this reason, the traveling wind flowing along the upper surface portion 21 changes its direction very smoothly downward.

本実施形態のように機関本体４が隔壁１に近接しているると、遮熱カバー２０の後ろの後部空間３６（図４で網かけ表示した空間）は、隔壁１とボンネット（図示せず）とで囲われた袋小路になっており、後部空間３６に空気が入り込みにくい一方、エンジンルーム３の下面に大きな空間が空いていると共に、遮熱カバー２０の下面部２３によってガイドされた走行風が下向きに向かっているため、遮熱カバー２０の後ろの部位は負圧状態になっており、このため、遮熱カバー２０の上面部２１を流れてきた走行風は、後部空間３６に向かうことなく下方に向かうようにガイドされる。これにより、受熱した走行風を車外に逃がすことが確実化される。   When the engine body 4 is close to the partition wall 1 as in the present embodiment, the rear space 36 (the space shaded in FIG. 4) behind the heat shield cover 20 is separated from the partition wall 1 and the bonnet (not shown). ), And it is difficult for air to enter the rear space 36, while a large space is vacated on the lower surface of the engine room 3 and the traveling wind guided by the lower surface portion 23 of the heat shield cover 20. Is directed downward, the portion behind the heat shield cover 20 is in a negative pressure state. Therefore, the traveling wind that has flowed through the upper surface portion 21 of the heat shield cover 20 is directed toward the rear space 36. It is guided so as to go downward. Thereby, it is ensured that the received traveling wind is released outside the vehicle.

また、遮熱カバー２０の下側連接部３０は屈曲に近い曲がりであるため、下面部２３に沿って流れた走行風が上向きに方向変換することはなくて、下向きの風向を確実に保持できると共に、外面部２２に沿って下向きに流れる走行風の流れと一体化して、強い下向きの流れを作ることができる。   Further, since the lower connecting portion 30 of the heat shield cover 20 is a bend that is close to bending, the traveling wind that flows along the lower surface portion 23 does not change upward, and the downward wind direction can be reliably maintained. At the same time, it can be integrated with the flow of the traveling wind flowing downward along the outer surface portion 22 to create a strong downward flow.

本実施形態のように、排気マニホールド１４を設けた長手側面６ａが下向きになるように機関本体４を傾斜させると、図５のとおり、遮熱カバー２０の外面部２２は下に行くほどシリンダヘッド６に近づくように傾斜する一方、外面部２２は前端から後端に向けて高さが高くなっているため、走行風は外面部２２によっても下向きにガイドされる。このため、走行風の下向きガイド機能が一層向上する。   When the engine body 4 is tilted so that the longitudinal side surface 6a provided with the exhaust manifold 14 faces downward as in the present embodiment, as shown in FIG. 5, the outer surface portion 22 of the heat shield cover 20 goes down toward the cylinder head. 6, while the outer surface portion 22 increases in height from the front end toward the rear end, the traveling wind is also guided downward by the outer surface portion 22. For this reason, the downward guide function of traveling wind is further improved.

また、下面部２３はシリンダヘッド６から遠ざかるに従って下になるように水平に対して傾斜するため、下面部２３に沿って流れてきた走行風が上向きに向かうことを確実に阻止して、下向きの強い流れを形成できる。本実施形態のように、ガイドリブ３１，３２を設けると、走行風を下向きにガイドする機能を向上できるのみならず、遮熱カバー２０の表面積を増大して遮熱カバー２０の冷却性能も向上できる。   Moreover, since the lower surface part 23 inclines with respect to the horizontal so that it goes down as it distances from the cylinder head 6, it surely prevents the traveling wind flowing along the lower surface part 23 from moving upward, A strong flow can be formed. When the guide ribs 31 and 32 are provided as in the present embodiment, not only the function of guiding the traveling wind downward can be improved, but also the surface area of the heat shield cover 20 can be increased to improve the cooling performance of the heat shield cover 20. .

更に、本実施形態のように空気流入穴３３を設けると、遮熱カバー２０と排気マニホールド１４との間の換気もできるため、排気マニホールド１４の冷却性も向上できる。この場合、遮熱カバー２０は縦断面積が後ろに行くほど大きくなっているので、空気流入穴３２に流入した走行風は、内部で淀むことなく速やかに排出される。   Furthermore, when the air inflow hole 33 is provided as in the present embodiment, ventilation between the heat shield cover 20 and the exhaust manifold 14 can be performed, so that the cooling performance of the exhaust manifold 14 can be improved. In this case, since the heat shield cover 20 becomes larger as the longitudinal cross-sectional area goes rearward, the traveling wind flowing into the air inflow hole 32 is quickly discharged without stagnating inside.

本願発明の実施形態の一例を説明したが、本願発明は他にも様々に具体化できる。例えば、排気マニホールドを覆う遮熱カバーは触媒ケースを覆うケースカバーとを一体化してもよい。スラント式でないシリンダボアを鉛直姿勢にした内燃機関にも適用できることはいうまでもない。   Although an example of the embodiment of the present invention has been described, the present invention can be embodied in various ways. For example, the heat insulating cover that covers the exhaust manifold may be integrated with the case cover that covers the catalyst case. Needless to say, the present invention can be applied to an internal combustion engine in which a cylinder bore which is not a slant type is in a vertical posture.

本願発明は、実際に内燃機関に具体化できる。従って、産業上利用できる。   The present invention can actually be embodied in an internal combustion engine. Therefore, it can be used industrially.

１ 隔壁
２ 車内
３ エンジンルーム
４ 機関本体
６ シリンダヘッド
６ａ 長手一側面（排気側面）
１１ クランク軸線
１２ シリンダボア軸線
１４ 排気マニホールド
１５ 触媒ケース
１７ アクセルペダル
２０ 遮熱カバー
２１ 上面部
２１ａ 上面部の後部
２２ 外面部
２３ 下面部
２４ 前面部
２９ 上側連接部
３０ 下側連接部 DESCRIPTION OF SYMBOLS 1 Bulkhead 2 Car interior 3 Engine room 4 Engine main body 6 Cylinder head 6a One longitudinal side (exhaust side)
11 Crank Axis 12 Cylinder Bore Axis 14 Exhaust Manifold 15 Catalyst Case 17 Accelerator Pedal 20 Heat Insulation Cover 21 Upper Surface Part 21a Upper Part of Rear Part 22 Outer Part 23 Lower Part 24 Front Part 29 Upper Joint Part 30 Lower Joint Part

Claims (3)

排気マニホールドを固定した長手一側面が車両の前後方向に長手となるように配置されたシリンダヘッドの前記長手一側面に固定されて前記排気マニホールドを外側から覆う遮熱カバーであって、
前記排気マニホールドを外側から覆うように上面部と外面部と下面部とを有して正面視で外向き突状に膨らんだ形状であり、前記下面部を後ろに行くほど下がるように傾斜させている、
車両用内燃機関の排気マニホールド用遮熱カバー。 A heat insulating cover that is fixed to the one longitudinal side surface of the cylinder head that is disposed so that one longitudinal side surface to which the exhaust manifold is fixed is longitudinal in the longitudinal direction of the vehicle and covers the exhaust manifold from the outside;
The exhaust manifold has an upper surface portion, an outer surface portion, and a lower surface portion so as to cover the exhaust manifold from the outside, and has a shape that bulges outward in a front view, and the lower surface portion is inclined so as to be lowered toward the rear. Yes,
Heat insulation cover for exhaust manifold of internal combustion engine for vehicles. 排気マニホールドを固定した長手一側面が車両の前後方向に長手となるように配置されたシリンダヘッドの前記長手一側面に固定されて前記排気マニホールドを外側から覆う遮熱カバーであって、
前記排気マニホールドを外側から覆うように上面部と外面部と下面部とを有して正面視で外向き突状に膨らんだ形状であり、前記上面部は、側面視で上向き凸状でかつ前端よりも後端が低くなるように緩く湾曲している、
車両用内燃機関の排気マニホールド用遮熱カバー。 A heat insulating cover that is fixed to the one longitudinal side surface of the cylinder head that is disposed so that one longitudinal side surface to which the exhaust manifold is fixed is longitudinal in the longitudinal direction of the vehicle and covers the exhaust manifold from the outside;
The exhaust manifold has an upper surface portion, an outer surface portion, and a lower surface portion so as to cover the exhaust manifold from the outside, and has a shape that bulges outward in a front view, and the upper surface portion is convex upward and has a front end in a side view Is gently curved so that the rear end is lower than
Heat insulation cover for exhaust manifold of internal combustion engine for vehicles. 前記上面部と外面部とを繋ぐ上側連接部は略全長に亙って緩く湾曲している一方、前記下面部と外面部とを繋ぐ下側連接部のうち少なくとも一部が、前記上側連接部よりも急激に曲がっている、
請求項１又は２に記載した車両用内燃機関の排気マニホールド用遮熱カバー。 The upper connecting portion connecting the upper surface portion and the outer surface portion is gently curved over substantially the entire length, and at least a part of the lower connecting portion connecting the lower surface portion and the outer surface portion is the upper connecting portion. Bends more rapidly than
A heat shield cover for an exhaust manifold of an internal combustion engine for a vehicle according to claim 1 or 2.
JP2014070385A 2014-03-28 2014-03-28 Vertically mounted internal combustion engine for vehicles Active JP6355191B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014070385A JP6355191B2 (en) 2014-03-28 2014-03-28 Vertically mounted internal combustion engine for vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014070385A JP6355191B2 (en) 2014-03-28 2014-03-28 Vertically mounted internal combustion engine for vehicles

Publications (2)

Publication Number Publication Date
JP2015190443A true JP2015190443A (en) 2015-11-02
JP6355191B2 JP6355191B2 (en) 2018-07-11

Family

ID=54425131

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2014070385A Active JP6355191B2 (en) 2014-03-28 2014-03-28 Vertically mounted internal combustion engine for vehicles

Country Status (1)

Country Link
JP (1) JP6355191B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017217995A (en) * 2016-06-07 2017-12-14 マツダ株式会社 Exhaust structure for longitudinal multi-cylinder engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0278718U (en) * 1988-12-01 1990-06-18
JPH09177564A (en) * 1995-12-27 1997-07-08 Nissan Motor Co Ltd Heat insulator of engine
JPH10331632A (en) * 1997-05-30 1998-12-15 Suzuki Motor Corp Exhaust manifold device for internal combustion engine
WO2011021306A1 (en) * 2009-08-21 2011-02-24 イビデン株式会社 Insulator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0278718U (en) * 1988-12-01 1990-06-18
JPH09177564A (en) * 1995-12-27 1997-07-08 Nissan Motor Co Ltd Heat insulator of engine
JPH10331632A (en) * 1997-05-30 1998-12-15 Suzuki Motor Corp Exhaust manifold device for internal combustion engine
WO2011021306A1 (en) * 2009-08-21 2011-02-24 イビデン株式会社 Insulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017217995A (en) * 2016-06-07 2017-12-14 マツダ株式会社 Exhaust structure for longitudinal multi-cylinder engine

Also Published As

Publication number Publication date
JP6355191B2 (en) 2018-07-11

Similar Documents

Publication Publication Date Title
JP5729487B2 (en) Vehicle front structure
JP4650261B2 (en) Intercooler arrangement structure for turbocharged engine
JP6500646B2 (en) Engine intake system
JP6248613B2 (en) Vehicle lower structure
JP6413782B2 (en) Engine intake system
JP6089790B2 (en) Intake device for vehicle engine
JP6350256B2 (en) Engine intake system
JP6355191B2 (en) Vertically mounted internal combustion engine for vehicles
JP2014058178A (en) Engine undercover
US11565583B2 (en) Engine cooling structure for motorcycle
WO2020238132A1 (en) All-terrain vehicle
JP6417860B2 (en) Intake device for internal combustion engine
JP2010196643A (en) Device for guiding air currents caused by vehicle travel to intercooler in vehicle
JP6156986B2 (en) Internal combustion engine for vehicles
JP5119799B2 (en) Vehicle structure
JP6901380B2 (en) Water collection chamber for exhaust pipe for internal combustion engine
JP2009208609A (en) Automobile engine underside-cover
JP2013015122A (en) Air-cooled internal combustion engine
JP2016211383A (en) Internal combustion engine for vehicle
JP7313776B2 (en) vehicle front structure
JP6512552B2 (en) Engine chamber air derivative
JP2012219696A (en) Intake air device for vehicle engine
JP7322677B2 (en) vehicle undercarriage
JP6930814B2 (en) Vehicle intake introduction device
JP5146200B2 (en) Engine intake system

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20170303

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20171115

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20171115

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20171227

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20180606

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20180608

R150 Certificate of patent or registration of utility model

Ref document number: 6355191

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250