JP2016118132A - Heat insulation member for suction port - Google Patents

Heat insulation member for suction port Download PDF

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JP2016118132A
JP2016118132A JP2014257444A JP2014257444A JP2016118132A JP 2016118132 A JP2016118132 A JP 2016118132A JP 2014257444 A JP2014257444 A JP 2014257444A JP 2014257444 A JP2014257444 A JP 2014257444A JP 2016118132 A JP2016118132 A JP 2016118132A
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intake port
intake
heat insulating
insulating member
combustion chamber
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JP6439435B2 (en
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幸司 秦
Koji Hata
幸司 秦
弘己 大島
Hiroki Oshima
弘己 大島
山本　剛司
Tsuyoshi Yamamoto
剛司 山本
征二 松田
Seiji Matsuda
征二 松田
田中　大
Masaru Tanaka
大 田中
貴之 城田
Takayuki Shirota
貴之 城田
欣也 井上
Kinya Inoue
欣也 井上
優貴 土橋
Yuki Dobashi
優貴 土橋
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Mitsubishi Motors Corp
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Mitsubishi Motors Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a heat insulation member for a suction port that is not fused and in which suction air is not heated.SOLUTION: A heat insulation member 5 for a suction port is disposed inside a suction port 2 formed in a cylinder head 1 of an internal combustion engine, and performs heat insulation to suction air C going toward a combustion chamber 3. The shape of an outlet part 5a from which suction air C is discharged is formed into a shape of separating from a wall part 1a of the cylinder head 1. A path to the combustion chamber 3 in the suction port 2 is disposed correspondingly to a long portion.SELECTED DRAWING: Figure 1

Description

本発明は、吸気ポート用断熱部材に関する。   The present invention relates to a heat insulating member for an intake port.

図８は従来の内燃機関を示している。同図において内燃機関２０は、シリンダブロック２１とアルミニウム製のシリンダヘッド２２とを有しており、シリンダブロック２１は筒状のシリンダ２３を形成し、シリンダ２３内にはコンロッド２４によって往復移動されるピストン２５が収容されている。シリンダヘッド２２は吸気ポート２６及び排気ポート２７を有しており、吸気ポート２６には吸気バルブ２８が、排気ポート２７には排気バルブ２９がそれぞれ開閉自在に設けられている。   FIG. 8 shows a conventional internal combustion engine. In FIG. 1, an internal combustion engine 20 includes a cylinder block 21 and an aluminum cylinder head 22. The cylinder block 21 forms a cylindrical cylinder 23, and is reciprocated by a connecting rod 24 in the cylinder 23. Piston 25 is accommodated. The cylinder head 22 has an intake port 26 and an exhaust port 27. An intake valve 28 is provided in the intake port 26, and an exhaust valve 29 is provided in the exhaust port 27 so as to be openable and closable.

シリンダ２３を形成しているシリンダブロック２１の内壁面と、シリンダヘッド２２のシリンダブロック２１側の面と、ピストン２５の上端面と、吸気バルブ２８の下端面と、排気バルブ２９の下端面とが形成する空間は燃焼室３０である。燃焼室３０は吸気ポート２６及び排気ポート２７に連通可能であり、燃焼室３０と吸気ポート２６との連通は吸気バルブ２８によって、燃焼室３０と排気ポート２７との連通は排気バルブ２９によってそれぞれ開閉される。   An inner wall surface of the cylinder block 21 forming the cylinder 23, a surface of the cylinder head 22 on the cylinder block 21 side, an upper end surface of the piston 25, a lower end surface of the intake valve 28, and a lower end surface of the exhaust valve 29 are provided. The space to be formed is the combustion chamber 30. The combustion chamber 30 can communicate with the intake port 26 and the exhaust port 27. The communication between the combustion chamber 30 and the intake port 26 is opened and closed by the intake valve 28, and the communication between the combustion chamber 30 and the exhaust port 27 is opened and closed by the exhaust valve 29. Is done.

シリンダヘッド２２の燃焼室３０のほぼ中央と対応する部位には点火装置３１が配設されている。点火装置３１は、図示しない点火プラグと点火コイルとが一体に構成されており、点火プラグ側の端部が燃焼室３０に露出している。吸気ポート２６の入口２６ａには樹脂製の吸気管３２が接続されており、吸気管３２が形成する吸気通路３３は吸気ポート２６に連通している。吸気管３２は複数のシリンダ２３毎に設けられており、各吸気管３２は樹脂により一体形成されたインテークマニホールドを構成する。吸気管３２は燃焼室３０と対向する端部が図示しない吸気導入部に接続されており、吸気導入部から導入された空気はそれぞれ図示しないエアクリーナ、スロットル、サージタンクを経由して吸気通路３３から吸気ポート２６に供給される。   An ignition device 31 is disposed in a portion of the cylinder head 22 corresponding to the substantially center of the combustion chamber 30. In the ignition device 31, an ignition plug and an ignition coil (not shown) are integrally formed, and an end portion on the ignition plug side is exposed to the combustion chamber 30. A resin intake pipe 32 is connected to the inlet 26 a of the intake port 26, and an intake passage 33 formed by the intake pipe 32 communicates with the intake port 26. An intake pipe 32 is provided for each of the plurality of cylinders 23, and each intake pipe 32 constitutes an intake manifold integrally formed of resin. The intake pipe 32 has an end facing the combustion chamber 30 connected to an intake introduction portion (not shown), and air introduced from the intake introduction portion passes through an intake passage 33 via an air cleaner, a throttle, and a surge tank (not shown). It is supplied to the intake port 26.

吸気管３２の出口部の上方には、吸気ポート２６に吸入される空気に対して燃料を噴射するインジェクタ３４が配設されている。インジェクタ３４は、一方の端部が吸気ポート２６内に露出し、他方の端部が燃料レール３５に接続されている。インジェクタ３４の一方の端部には図示しない噴出口が形成されており、インジェクタ３４はその一方の端部近傍をシリンダヘッド２２によって固定されている。   An injector 34 for injecting fuel to the air sucked into the intake port 26 is disposed above the outlet portion of the intake pipe 32. One end of the injector 34 is exposed in the intake port 26, and the other end is connected to the fuel rail 35. A jet port (not shown) is formed at one end of the injector 34, and the injector 34 is fixed near the one end by the cylinder head 22.

上述した内燃機関２０において、吸気管３２が樹脂製であるのに対しシリンダヘッド２２はアルミニウム等の金属製であり、シリンダヘッド２２は燃焼室３０の熱により高温（例えば８０〜９０℃）となるのに対し吸気管３２は温度上昇が少なく大気温度とほぼ同等の温度である場合が多い。このため、吸気管３２を通過した吸気は吸気ポート２６に流入すると温度上昇して体積膨張し、その結果として燃焼室３０に吸入される吸気流量が少なくなり内燃機関の出力が低下するという問題があった。そこで、吸気ポートに接続される樹脂製の吸気管の出口に、樹脂により一体形成され吸気ポートの入口から吸気ポートの内部に挿入される挿入部を備えた吸気管の取付構造が知られている（例えば「特許文献１」参照）。   In the internal combustion engine 20 described above, the intake pipe 32 is made of resin, whereas the cylinder head 22 is made of metal such as aluminum, and the cylinder head 22 becomes high temperature (for example, 80 to 90 ° C.) due to heat of the combustion chamber 30. On the other hand, the intake pipe 32 has a little temperature rise and is almost the same as the atmospheric temperature. For this reason, when the intake air that has passed through the intake pipe 32 flows into the intake port 26, the temperature rises and the volume expands. As a result, the intake flow rate drawn into the combustion chamber 30 decreases and the output of the internal combustion engine decreases. there were. Therefore, an intake pipe mounting structure is known in which an outlet portion of a resin-made intake pipe connected to the intake port is integrally formed of resin and has an insertion portion that is inserted into the intake port from the inlet port. (For example, refer to “Patent Document 1”).

特開２００７−２８５１７１号公報JP 2007-285171 A

内燃機関２０では、吸気ポート２６と排気ポート２７とが同時に開くバルブオーバラップ期間中に、燃焼室３０から吸気ポート２６内に熱気が流入する。このため、上述の技術のように吸気ポート２６内部の燃焼室３０に近い位置、例えば図９に符号Ａで示す溶融領域まで断熱部材を挿入すると、このバルブオーバラップ期間で樹脂製の断熱部材が溶融してしまう。そこで溶融しない位置、例えば図９に符号Ｂで示す非溶融領域まで断熱部材を吸気ポート２６の吸気流入方向上流側に移動させると、図１０に示すように、せっかく断熱部材３６によって断熱された吸気が、燃焼室に近く温度がより高いアルミニウム製のシリンダヘッド２２の壁に当たり、矢印で示すような熱気の流入により温められて上述した不具合が生じてしまう。
本発明は上述の問題点を解決し、溶融することなくかつ吸気が温められることがない吸気ポート用断熱部材の提供を目的とする。 In the internal combustion engine 20, hot air flows from the combustion chamber 30 into the intake port 26 during a valve overlap period in which the intake port 26 and the exhaust port 27 open simultaneously. For this reason, when the heat insulating member is inserted to a position close to the combustion chamber 30 inside the intake port 26 as in the above-described technique, for example, to the melting region indicated by the symbol A in FIG. It will melt. Therefore, when the heat insulating member is moved upstream of the intake port 26 in the intake air inflow direction to a position where it does not melt, for example, to the non-molten region indicated by B in FIG. 9, the intake air thermally insulated by the heat insulating member 36 as shown in FIG. However, it hits the wall of the aluminum cylinder head 22 that is close to the combustion chamber and has a higher temperature, and is heated by the inflow of hot air as shown by the arrows, causing the above-mentioned problems.
An object of the present invention is to solve the above-described problems and to provide an intake port heat insulating member that does not melt and that does not warm intake air.

請求項１記載の発明は、内燃機関のシリンダヘッドに形成された吸気ポートの内部に配設され燃焼室へと向かう吸気を断熱させる吸気ポート用断熱部材であって、前記吸気が排出される出口部の形状は、前記シリンダヘッドの壁部より離れる形状を呈し、前記吸気ポートのうち前記燃焼室までの経路が長い部分に対応して配設されていることを特徴とする。   The invention according to claim 1 is an intake port heat insulating member that is disposed inside an intake port formed in a cylinder head of an internal combustion engine and insulates intake air toward the combustion chamber, and is an outlet from which the intake air is discharged The shape of the portion is a shape separated from the wall portion of the cylinder head, and is arranged corresponding to a portion of the intake port that has a long path to the combustion chamber.

請求項２記載の発明は、請求項１記載の吸気ポート用断熱部材において、さらに前記吸気ポートのうち前記燃焼室までの経路が短い部分に対応して配設されていることを特徴とする。   According to a second aspect of the present invention, in the heat insulating member for an intake port according to the first aspect of the present invention, the intake port is further disposed corresponding to a portion having a short path to the combustion chamber.

請求項３記載の発明は、請求項２記載の吸気ポート用断熱部材において、さらに前記吸気ポートのうち前記燃焼室までの経路が長い部分の前記出口部の形状は前記燃焼室までの経路が短い部分の前記出口部の形状に比して前記壁部より離れる距離が大きくなるように形成されていることを特徴とする。   According to a third aspect of the present invention, in the heat insulating member for an intake port according to the second aspect, the shape of the outlet portion of the portion of the intake port where the path to the combustion chamber is long has a short path to the combustion chamber. The distance away from the wall portion is larger than the shape of the outlet portion of the portion.

請求項４記載の発明は、請求項１ないし３の何れか一つに記載の吸気ポート用断熱部材において、さらに前記出口部の形状は前記吸気の排出方向下流側に向かうに従い前記壁部から離れる形状であることを特徴とする。   According to a fourth aspect of the present invention, in the heat insulating member for an intake port according to any one of the first to third aspects, the shape of the outlet portion further moves away from the wall portion toward the downstream side in the discharge direction of the intake air. It is a shape.

本発明によれば、吸気ポートの非溶融領域に配設された吸気ポート用断熱部材は内燃機関のバルブオーバラップ期間中においても溶融することがなく、さらにその内部を通過する吸気が出口部によって方向付けられることにより壁部への接触が防止されるので、吸気が温められることがなく吸気の体積膨張を防止でき、内燃機関の出力低下を防止することができる。   According to the present invention, the intake port heat insulating member disposed in the non-melting region of the intake port is not melted even during the valve overlap period of the internal combustion engine, and the intake air passing through the intake port is prevented by the outlet portion. Since the orientation prevents the contact with the wall portion, the intake air is not warmed, the volume expansion of the intake air can be prevented, and the output reduction of the internal combustion engine can be prevented.

本発明の第１の実施形態を適用した内燃機関のシリンダヘッドに形成された吸気ポートの概略図である。It is the schematic of the intake port formed in the cylinder head of the internal combustion engine to which the first embodiment of the present invention is applied. 本発明の第１の実施形態に用いられる吸気ポート用断熱部材を示す概略図である。It is the schematic which shows the heat insulation member for intake ports used for the 1st Embodiment of this invention. 本発明の第１の実施形態に用いられる吸気ポート用断熱部材の形状を説明する概略図である。It is the schematic explaining the shape of the heat insulation member for intake ports used for the 1st Embodiment of this invention. 本発明の第２の実施形態に用いられる吸気ポート用断熱部材を説明する概略図である。It is the schematic explaining the heat insulation member for intake ports used for the 2nd Embodiment of this invention. 本発明の第３の実施形態に用いられる吸気ポート用断熱部材を説明する概略図である。It is the schematic explaining the heat insulation member for intake ports used for the 3rd Embodiment of this invention. 本発明の第４の実施形態に用いられる吸気ポート用断熱部材を説明する概略図である。It is the schematic explaining the heat insulation member for intake ports used for the 4th Embodiment of this invention. 本発明の第５の実施形態に用いられる吸気ポート用断熱部材を説明する概略図である。It is the schematic explaining the heat insulation member for intake ports used for the 5th Embodiment of this invention. 従来の内燃機関を説明する概略図である。It is the schematic explaining the conventional internal combustion engine. 従来の内燃機関のシリンダヘッドに形成された吸気ポートの概略図である。It is the schematic of the intake port formed in the cylinder head of the conventional internal combustion engine. 従来の問題点を説明する内燃機関のシリンダヘッドに形成された吸気ポートの概略図である。It is the schematic of the intake port formed in the cylinder head of the internal combustion engine explaining the conventional problem.

図１は、本発明の第１の実施形態を適用した内燃機関のシリンダヘッドに形成された吸気ポートの概略図である。同図において、アルミニウム製のシリンダヘッド１には従来と同様に吸気ポート２と図示しない排気ポートとが形成されており、吸気ポート２と図示しない排気ポートとは燃焼室３に連接されている。吸気ポート２には吸気バルブ４が、図示しない排気ポートには図示しない排気バルブがそれぞれ開閉自在に設けられている。   FIG. 1 is a schematic view of an intake port formed in a cylinder head of an internal combustion engine to which a first embodiment of the present invention is applied. In the figure, an aluminum cylinder head 1 is formed with an intake port 2 and an exhaust port (not shown) as in the prior art, and the intake port 2 and an exhaust port (not shown) are connected to a combustion chamber 3. The intake port 2 is provided with an intake valve 4 and the exhaust port (not shown) is provided with an exhaust valve (not shown) that can be opened and closed.

従来技術と同様に、吸気ポート２の非溶融領域には、本発明の特徴部である吸気ポート用断熱部材５が配設されている。吸気ポート用断熱部材５は、シリンダヘッド１よりも熱伝導率が低い部材、例えば樹脂によって形成されている。その内部を吸気Ｃが通過する吸気ポート用断熱部材５は、その吸気Ｃが排出される出口部５ａの形状が、吸気Ｃをシリンダヘッド１の壁部１ａから遠ざけるべく、吸気排出方向下流側に向かうに従い壁部１ａより離れる形状となるように形成されている。出口部５ａは、吸気Ｃが吸気ポート用断熱部材５から排出される際に大きな抵抗とならないように、吸気ポート用断熱部材５の内面と曲面形状によって連続されている。   As in the prior art, an intake port heat insulating member 5, which is a feature of the present invention, is disposed in the non-melting region of the intake port 2. The intake port heat insulating member 5 is formed of a member having a lower thermal conductivity than the cylinder head 1, for example, a resin. The intake port heat insulating member 5 through which the intake air C passes is formed so that the shape of the outlet portion 5a from which the intake air C is discharged is on the downstream side in the intake air discharge direction so as to keep the intake air C away from the wall portion 1a of the cylinder head 1. It forms so that it may become the shape which leaves | separates from the wall part 1a as it goes. The outlet portion 5a is continuous with the inner surface of the intake port heat insulating member 5 and the curved surface shape so as not to cause a large resistance when the intake air C is discharged from the intake port heat insulating member 5.

吸気ポート用断熱部材５は、第１の実施形態においては図２に示すような吸気ポート２の内周面全域に設けられたブッシュ形状を呈しているが、シリンダヘッド１に取り付けられるインテークマニホールドと一体形成されていてもよい。吸気ポート用断熱部材５は、図３に示すようにその全周に出口部５ａが形成されており、出口部５ａの突出量である高さは、図３において上側である吸気ポート２の燃焼室３までの経路が長い部分の高さがＤ、図３において下側である吸気ポート２の燃焼室３までの経路が短い部分の高さもＤとなるように形成されている。この高さＤは、吸気ポート用断熱部材５を通過する吸気Ｃの主流が壁部１ａに衝突しないように方向付けられる高さとなるように設定されている。   In the first embodiment, the heat insulating member 5 for the intake port has a bush shape provided on the entire inner peripheral surface of the intake port 2 as shown in FIG. 2, but an intake manifold attached to the cylinder head 1 and It may be integrally formed. As shown in FIG. 3, the intake port heat insulating member 5 has an outlet portion 5a formed on the entire periphery thereof, and the height of the protruding portion of the outlet portion 5a is the combustion of the intake port 2 on the upper side in FIG. The height of the portion where the path to the chamber 3 is long is D, and the height of the portion where the path to the combustion chamber 3 of the intake port 2 which is the lower side in FIG. The height D is set so as to be directed so that the main flow of the intake air C passing through the intake port heat insulating member 5 does not collide with the wall portion 1a.

上述の構成により、吸気ポート２の非溶融領域に配設された吸気ポート用断熱部材５は内燃機関のバルブオーバラップ期間中においても溶融することがなく、さらにその内部を通過する吸気Ｃが出口部５ａによって方向付けられることにより壁部１ａへの衝突が緩和されるので、吸気Ｃが温められることがなく吸気Ｃの体積膨張を防止でき、内燃機関の出力低下を防止することができる。   With the above-described configuration, the intake port heat insulating member 5 disposed in the non-melting region of the intake port 2 is not melted even during the valve overlap period of the internal combustion engine, and the intake C passing through the inside thereof is discharged from the outlet. Since the collision with the wall portion 1a is alleviated by being directed by the portion 5a, the intake C is not warmed, volume expansion of the intake C can be prevented, and output reduction of the internal combustion engine can be prevented.

図４は、本発明の第２の実施形態に用いられる吸気ポート用断熱部材６を示している。吸気ポート用断熱部材６は、図４において上側である吸気ポート２の燃焼室３までの経路が長い部分にのみ設けられており、その吸気Ｃが排出される出口部６ａの形状は吸気ポート用断熱部材５と同様に形成されている。この構成により、吸気Ｃのうち壁部１ａからの熱を受け易い吸気ポート２の燃焼室３までの経路が長い部分を通過する吸気Ｃを出口部６ａによって方向付け、これにより吸気Ｃが温められることが防止されるので、第１の実施形態とほぼ同様の作用効果を得ることができる。   FIG. 4 shows an intake port heat insulating member 6 used in the second embodiment of the present invention. The intake port heat insulating member 6 is provided only in a portion where the path to the combustion chamber 3 of the intake port 2 on the upper side in FIG. 4 is long, and the shape of the outlet portion 6a from which the intake C is discharged is for the intake port. It is formed similarly to the heat insulating member 5. With this configuration, the outlet portion 6a directs the intake air C that passes through the portion of the intake air C that is likely to receive heat from the wall portion 1a to the combustion chamber 3 of the intake port 2 to warm the intake air C. Since this is prevented, it is possible to obtain substantially the same operational effects as in the first embodiment.

図５は本発明の第３の実施形態に用いられる吸気ポート用断熱部材７を、図６は本発明の第４の実施形態に用いられる吸気ポート用断熱部材８をそれぞれ示している。吸気ポート用断熱部材７は、その出口部７ａの形状が、吸気Ｃをシリンダヘッド１の壁部１ａから遠ざけるべく、吸気排出方向下流側に向かうに従い壁部１ａより離れる形状となるように形成されていると共に、吸気Ｃが吸気ポート用断熱部材７から排出される際に大きな抵抗とならないように、吸気ポート用断熱部材７の内面と平面形状によって連続されている。吸気ポート用断熱部材８は、その出口部８ａの形状が、吸気Ｃをシリンダヘッド１の壁部１ａから遠ざけるべく、吸気排出方向下流側に向かうに従い壁部１ａより離れる形状となるように形成されていると共に、吸気Ｃが吸気ポート用断熱部材８から排出される際に大きな抵抗とならないように、吸気ポート用断熱部材８の内面と同一平面となるように形成されている。この構成により、第１の実施形態と同様の作用効果を得ることができる。   FIG. 5 shows an intake port heat insulating member 7 used in the third embodiment of the present invention, and FIG. 6 shows an intake port heat insulating member 8 used in the fourth embodiment of the present invention. The intake port heat insulating member 7 is formed so that the shape of the outlet portion 7a thereof is separated from the wall portion 1a toward the downstream side in the intake air discharge direction in order to keep the intake air C away from the wall portion 1a of the cylinder head 1. At the same time, the intake port C is continuous with the inner surface of the intake port heat insulating member 7 so as not to have a large resistance when being discharged from the intake port heat insulating member 7. The intake port heat insulating member 8 is formed so that the shape of the outlet portion 8a thereof is separated from the wall portion 1a toward the downstream side in the intake air discharge direction in order to keep the intake air C away from the wall portion 1a of the cylinder head 1. In addition, it is formed so as to be flush with the inner surface of the intake port heat insulating member 8 so that the intake C does not become a large resistance when discharged from the intake port heat insulating member 8. With this configuration, it is possible to obtain the same effects as those of the first embodiment.

図７は、本発明の第５の実施形態に用いられる吸気ポート用断熱部材９を示している。吸気ポート用断熱部材９は、吸気ポート２の燃焼室３までの経路が長い部分と対応した出口部９ａ及び吸気ポート２の燃焼室３までの経路が短い部分と対応した出口部９ｂの形状が、吸気Ｃをシリンダヘッド１の壁部１ａから遠ざけるべく、吸気排出方向下流側に向かうに従い壁部１ａより離れる形状となるように形成されていると共に、出口部９ａの突出量、すなわち壁部１ａから離れる距離Ｅが、出口部９ｂの突出量、すなわち壁部１ａから離れる距離Ｆよりも大きくなるように形成されている。なお、距離Ｆは第１の実施形態で示した高さＤと同じである。この構成により、吸気Ｃのうち壁部１ａからの熱を受け易い吸気ポート２の燃焼室３までの経路が長い部分を通過する吸気Ｃを出口部９ａによってより一層壁部１ａから遠ざかる向きに方向付け、これにより吸気Ｃが温められることがより一層防止されるので、内燃機関の出力低下を確実に防止することができる。   FIG. 7 shows an intake port heat insulating member 9 used in the fifth embodiment of the present invention. The heat insulating member 9 for the intake port has the shape of the outlet portion 9a corresponding to the portion where the route to the combustion chamber 3 of the intake port 2 is long and the shape of the outlet portion 9b corresponding to the portion where the route to the combustion chamber 3 of the intake port 2 is short. In order to keep the intake air C away from the wall portion 1a of the cylinder head 1, it is formed so as to be separated from the wall portion 1a toward the downstream side in the intake air discharge direction, and the protruding amount of the outlet portion 9a, that is, the wall portion 1a. The distance E away from the wall is formed so as to be larger than the protruding amount of the outlet 9b, that is, the distance F away from the wall 1a. The distance F is the same as the height D shown in the first embodiment. With this configuration, the direction of the intake air C passing through the portion of the intake air C that is likely to receive heat from the wall portion 1a to the combustion chamber 3 of the intake port 2 is further away from the wall portion 1a by the outlet portion 9a. In addition, this further prevents the intake air C from being warmed, so that a decrease in the output of the internal combustion engine can be reliably prevented.

以上、本発明の好ましい実施の形態について説明したが、本発明は上述した特定の実施形態に限定されるものではなく、上述の説明で特に限定していない限り、特許請求の範囲に記載された本発明の趣旨の範囲内において、種々の変形・変更が可能である。本発明の実施の形態に記載された効果は本発明から生じる最も好適な効果を列挙したに過ぎず、本発明による効果は本発明の実施の形態に記載されたものに限定されるものではない。   The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments described above, and is described in the claims unless specifically limited by the above description. Various modifications and changes can be made within the scope of the present invention. The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are not limited to those described in the embodiments of the present invention. .

１・・・シリンダヘッド、１ａ・・・壁部、２・・・吸気ポート、３・・・燃焼室、５，６，７，８，９・・・吸気ポート用断熱部材、５ａ，６ａ，７ａ，８ａ，９ａ，９ｂ・・・出口部、Ｃ・・・吸気 DESCRIPTION OF SYMBOLS 1 ... Cylinder head, 1a ... Wall part, 2 ... Intake port, 3 ... Combustion chamber, 5, 6, 7, 8, 9 ... Insulation member for intake ports, 5a, 6a, 7a, 8a, 9a, 9b ... outlet, C ... intake air

Claims (4)

内燃機関のシリンダヘッドに形成された吸気ポートの内部に配設され燃焼室へと向かう吸気を断熱させる吸気ポート用断熱部材であって、
前記吸気が排出される出口部の形状は、前記シリンダヘッドの壁部より離れる形状を呈し、前記吸気ポートのうち前記燃焼室までの経路が長い部分に対応して配設されていることを特徴とする吸気ポート用断熱部材。 A heat insulating member for an intake port that is disposed inside an intake port formed in a cylinder head of an internal combustion engine and insulates intake air toward the combustion chamber,
The shape of the outlet portion from which the intake air is discharged is a shape separated from the wall portion of the cylinder head, and is disposed corresponding to a portion of the intake port that has a long path to the combustion chamber. Insulation member for intake port. 請求項１記載の吸気ポート用断熱部材において、
前記吸気ポートのうち前記燃焼室までの経路が短い部分にも対応して配設されていることを特徴とする吸気ポート用断熱部材。 In the heat insulating member for an intake port according to claim 1,
A heat insulating member for an intake port, wherein the intake port is disposed corresponding to a portion of the intake port having a short path to the combustion chamber. 請求項２記載の吸気ポート用断熱部材において、
前記吸気ポートのうち前記燃焼室までの経路が長い部分の前記出口部の形状は前記燃焼室までの経路が短い部分の前記出口部の形状に比して前記壁部より離れる距離が大きくなるように形成されていることを特徴とする吸気ポート用断熱部材。 The heat insulating member for an intake port according to claim 2,
The shape of the outlet portion of the intake port where the path to the combustion chamber is long has a greater distance from the wall than the shape of the outlet portion where the path to the combustion chamber is short. A heat insulating member for an intake port, characterized in that it is formed. 請求項１ないし３の何れか一つに記載の吸気ポート用断熱部材において、
前記出口部の形状は前記吸気の排出方向下流側に向かうに従い前記壁部から離れる形状であることを特徴とする吸気ポート用断熱部材。 In the heat insulating member for an intake port according to any one of claims 1 to 3,
The heat insulating member for an intake port, wherein the shape of the outlet portion is a shape that is separated from the wall portion toward the downstream side in the discharge direction of the intake air.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018074205A1 (en) * 2016-10-21 2018-04-26 本田技研工業株式会社 Thermally insulated insert member and engine provided with same
DE102017111262A1 (en) 2017-05-23 2018-11-29 Man Truck & Bus Ag Heat-insulated air intake system for an internal combustion engine
JP2021076084A (en) * 2019-11-12 2021-05-20 株式会社Ｓｕｂａｒｕ engine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH084542A (en) * 1994-06-20 1996-01-09 Daihatsu Motor Co Ltd Intake port structure for internal combustion engine
JP2003056399A (en) * 2001-08-15 2003-02-26 Nissan Motor Co Ltd Heat insulation structure for intake port in internal combustion engine and spit-back flow rate estimating method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH084542A (en) * 1994-06-20 1996-01-09 Daihatsu Motor Co Ltd Intake port structure for internal combustion engine
JP2003056399A (en) * 2001-08-15 2003-02-26 Nissan Motor Co Ltd Heat insulation structure for intake port in internal combustion engine and spit-back flow rate estimating method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018074205A1 (en) * 2016-10-21 2018-04-26 本田技研工業株式会社 Thermally insulated insert member and engine provided with same
JPWO2018074205A1 (en) * 2016-10-21 2019-04-11 本田技研工業株式会社 Insulating insert member and engine equipped with the same
CN109891076A (en) * 2016-10-21 2019-06-14 本田技研工业株式会社 Heat-insulated insertion part and the engine for having the heat-insulated insertion part
US10907573B2 (en) 2016-10-21 2021-02-02 Honda Motor Co., Ltd. Thermally insulated insert member and engine having same
DE102017111262A1 (en) 2017-05-23 2018-11-29 Man Truck & Bus Ag Heat-insulated air intake system for an internal combustion engine
US11143138B2 (en) 2017-05-23 2021-10-12 Man Truck & Bus Ag Thermally insulated air inlet system for an internal combustion engine
JP2021076084A (en) * 2019-11-12 2021-05-20 株式会社Ｓｕｂａｒｕ engine
JP7365201B2 (en) 2019-11-12 2023-10-19 株式会社Subaru engine

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