JP2009264260A - Cooling water passage structure of cylinder head - Google Patents

Cooling water passage structure of cylinder head Download PDF

Info

Publication number
JP2009264260A
JP2009264260A JP2008115437A JP2008115437A JP2009264260A JP 2009264260 A JP2009264260 A JP 2009264260A JP 2008115437 A JP2008115437 A JP 2008115437A JP 2008115437 A JP2008115437 A JP 2008115437A JP 2009264260 A JP2009264260 A JP 2009264260A
Authority
JP
Japan
Prior art keywords
cooling water
water passage
cylinder head
spark plug
combustion chamber
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
JP2008115437A
Other languages
Japanese (ja)
Other versions
JP5035095B2 (en
Inventor
Yoshio Musha
義男 武者
Hiroki Nagabuchi
博樹 永渕
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP2008115437A priority Critical patent/JP5035095B2/en
Publication of JP2009264260A publication Critical patent/JP2009264260A/en
Application granted granted Critical
Publication of JP5035095B2 publication Critical patent/JP5035095B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling water passage structure of a cylinder head, which is suitable for a structure of a water jacket installed in a vehicle, and ensures cooling performance around a spark plug while relaxing the stress around the spark plug. <P>SOLUTION: The cooling water passage structure of the cylinder head, having cylinder head bolt through-holes at positions corresponding to four corners of a combustion chamber and including a spark plug mounting hole 14 at a position corresponding to an upper portion of the combustion chamber includes a cooling water passage 18 for allowing cooling water to flow around the spark plug mounting hole, and a columnar portion 50 which couples an upper wall 26a and a lower wall 26b of the cooling water passage. The columnar portion 50 is arranged at a distance from the spark plug mounting hole 14 between a plane including the two adjacent cylinder head bolt through-holes and the spark plug mounting hole 14. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は、内燃機関のシリンダヘッドの冷却水通路構造に係り、特に、車両に搭載されるウォータジャケットの構造に好適なシリンダヘッドの冷却水通路構造に関する。   The present invention relates to a cooling water passage structure of a cylinder head of an internal combustion engine, and more particularly to a cooling water passage structure of a cylinder head suitable for a water jacket structure mounted on a vehicle.

従来、例えば特許文献１に開示されているように、内燃機関のシリンダヘッドの上部壁と下部壁との間に冷却水通路を設けることが知られている。また、特許文献１には、ヘッドボルト通し孔の間に、冷却水通路の上部壁と下部壁とを結合する柱状部を配置したシリンダヘッドの冷却水通路構造が開示されている。   Conventionally, for example, as disclosed in Patent Document 1, it is known to provide a cooling water passage between an upper wall and a lower wall of a cylinder head of an internal combustion engine. Further, Patent Document 1 discloses a cooling water passage structure of a cylinder head in which a columnar portion that connects an upper wall and a lower wall of a cooling water passage is disposed between head bolt through holes.

特開２００３−１８４６４２号公報JP 2003-184642 A 実公平６−３９０７８号公報No. 6-39078 特開２００４−２３９１２６号公報JP 2004-239126 A

上記従来の冷却水通路構造によれば、ヘッドボルトに加えられる力の一部を柱状部に分散しヘッドボルト部の応力を緩和することができる。しかし、ヘッドボルトから離れた場所に位置する点火プラグ周辺の冷却水通路部に加わる応力の緩和は必ずしも十分ではない。上記従来の冷却水通路構造において、この点火プラグ周りの応力は、点火プラグ周りの冷却水通路部の内壁を厚くすることで緩和しうる。しかしながら、冷却水通路部の内壁を厚くすれば、点火プラグ周りと冷却水通路部との距離が離れてしまい、冷却性能が低下することになる。   According to the above-described conventional cooling water passage structure, a part of the force applied to the head bolt can be dispersed in the columnar portion to relieve the stress of the head bolt portion. However, the relaxation of the stress applied to the coolant passage portion around the spark plug located at a location away from the head bolt is not always sufficient. In the conventional cooling water passage structure, the stress around the spark plug can be alleviated by thickening the inner wall of the cooling water passage portion around the spark plug. However, if the inner wall of the cooling water passage portion is thickened, the distance between the spark plug and the cooling water passage portion is increased, and the cooling performance is lowered.

この発明は、上述のような課題を解決するためになされたもので、点火プラグ周りの応力を緩和しつつ点火プラグ周りの冷却性能を確保できるシリンダヘッドの冷却水通路構造を提供することを目的とする。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a cooling water passage structure for a cylinder head that can secure the cooling performance around the spark plug while relaxing the stress around the spark plug. And

第１の発明は、上記の目的を達成するため、シリンダヘッドの冷却水通路構造であって、燃焼室の四隅に相当する位置にヘッドボルト通し孔を有し、当該燃焼室の上部に相当する位置に点火プラグ取付け孔を備えたシリンダヘッドの冷却水通路構造において、
前記点火プラグ取付け孔の周囲に冷却水を流すことができる冷却水通路と、
前記冷却水通路の上部壁と下部壁とを結合する柱状部とを備え、
前記柱状部は、隣り合う２つの前記ヘッドボルト通し孔を含む平面と前記点火プラグ取付け孔との間に、前記点火プラグ取付け孔と距離を置いて配置されることを特徴とする。 In order to achieve the above object, the first invention is a cooling water passage structure of a cylinder head, having head bolt through holes at positions corresponding to the four corners of the combustion chamber, and corresponding to the upper portion of the combustion chamber. In the cooling water passage structure of the cylinder head having a spark plug mounting hole at a position,
A cooling water passage through which cooling water can flow around the spark plug mounting hole;
A columnar portion connecting the upper wall and the lower wall of the cooling water passage;
The columnar portion is disposed between a plane including the two adjacent head bolt through holes and the spark plug mounting hole at a distance from the spark plug mounting hole.

また、第２の発明は、第１の発明において、
前記点火プラグ取付け孔は、前記シリンダヘッドの長手方向に複数配置され、
前記柱状部は、前記シリンダヘッドの長手方向の両端にのみ配置されること、
を特徴とする。 The second invention is the first invention, wherein
A plurality of the spark plug mounting holes are arranged in the longitudinal direction of the cylinder head,
The columnar portions are disposed only at both ends in the longitudinal direction of the cylinder head;
It is characterized by.

また、第３の発明は、第１の発明又は第２の発明において、
前記シリンダヘッドは、燃焼室の上部に相当する位置に複数の排気ポートを備え、
前記冷却水通路は、前記柱状部から燃焼室の外縁に相当する部分に冷却水を流すことができる燃焼室外縁部冷却水通路を有し、
前記排気ポート間において、前記燃焼室外縁部冷却水通路と、前記点火プラグ取付け孔の周囲の冷却水通路とを接続する排気ポート間冷却水通路を備えることを特徴とする。 Moreover, 3rd invention is 1st invention or 2nd invention,
The cylinder head includes a plurality of exhaust ports at a position corresponding to the upper part of the combustion chamber,
The cooling water passage has a combustion chamber outer edge cooling water passage through which cooling water can flow from the columnar portion to a portion corresponding to the outer edge of the combustion chamber,
Between the exhaust ports, a cooling water passage between exhaust ports is provided that connects the combustion chamber outer edge cooling water passage and a cooling water passage around the spark plug mounting hole.

第１の発明によれば、点火プラグ取付け孔の近くに柱状部を配置することで、燃焼室上部の変形を抑え、点火プラグ周りに集中する応力を緩和することができる。点火プラグ周りの応力を緩和することで、冷却水通路を点火プラグの近くに配置することができる。そのため、点火プラグの近くに冷却水を流すことができ、十分な冷却性能を確保することができる。   According to the first invention, by arranging the columnar portion near the spark plug mounting hole, it is possible to suppress deformation of the upper portion of the combustion chamber and relieve stress concentrated around the spark plug. By relieving the stress around the spark plug, the cooling water passage can be disposed near the spark plug. Therefore, cooling water can be flowed near the spark plug, and sufficient cooling performance can be ensured.

第２の発明によれば、柱状部をシリンダヘッド長手方向の両端に位置する気筒の点火プラグ取付け孔の近くに配置することで、シリンダヘッドの端部に集中する応力を緩和することができる。また、他の気筒間には配置しないことで、シリンダヘッドの重量増加を抑えることができる。   According to the second invention, the stress concentrated on the end portion of the cylinder head can be relieved by arranging the columnar portions near the ignition plug mounting holes of the cylinders located at both ends of the cylinder head in the longitudinal direction. Moreover, the weight increase of a cylinder head can be suppressed by not arrange | positioning between other cylinders.

第３の発明によれば、冷却水通路に設けられた柱状部によって冷却水を分流させることができる。分流された冷却水によって、柱状部から燃焼室の外縁部に流れる流量が増加する。燃焼室外縁部に流れる流量が増加することで、排気ポート間に設けられた冷却水通路を流通する流量を増加させることができる。このため、本発明によれば、分流された冷却水により排気ポート間の冷却性能を高めることができる。   According to the third aspect, the cooling water can be diverted by the columnar portion provided in the cooling water passage. The flow rate flowing from the columnar portion to the outer edge of the combustion chamber is increased by the diverted cooling water. By increasing the flow rate flowing to the outer edge of the combustion chamber, the flow rate flowing through the cooling water passage provided between the exhaust ports can be increased. For this reason, according to this invention, the cooling performance between exhaust ports can be improved with the diverted cooling water.

実施の形態１．
［実施の形態１における基本構成］
以下、図１〜図７を参照して、本発明の実施の形態１について説明する。
図１は、本発明の実施の形態１における内燃機関のシリンダヘッドの構造を示す図である。図２は、図１のＢ−Ｂ線に沿ったシリンダヘッドの縦断面図である。図２に示すシリンダヘッド１０の下面には燃焼室の上壁部１２が形成されている。燃焼室の上壁部１２には、点火プラグ取付け孔１４が設けられている。シリンダヘッド１０の内部には、シリンダヘッド１０の各部を冷却するための冷却水通路１８が形成されている。冷却水通路１８には、ウォータポンプ（図示略）が接続されておりウォータポンプから冷却水が流入される。 Embodiment 1 FIG.
[Basic Configuration in Embodiment 1]
Hereinafter, the first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a diagram showing a structure of a cylinder head of an internal combustion engine in Embodiment 1 of the present invention. FIG. 2 is a longitudinal sectional view of the cylinder head taken along line BB in FIG. An upper wall portion 12 of the combustion chamber is formed on the lower surface of the cylinder head 10 shown in FIG. A spark plug mounting hole 14 is provided in the upper wall portion 12 of the combustion chamber. A cooling water passage 18 for cooling each part of the cylinder head 10 is formed in the cylinder head 10. A water pump (not shown) is connected to the cooling water passage 18 and cooling water flows from the water pump.

図３は図１のＡ−Ａ線に沿ったシリンダヘッドの横断面図である。図２で示した燃焼室の上壁部１２には、２つの吸気ポート２０と２つの排気ポート２２とが設けられている。また、燃焼室の上壁部１２の四隅には、シリンダヘッド１０の外壁部を貫通するヘッドボルト通し孔２４が設けられている。シリンダヘッド１０はシリンダブロック（図示略）の上側に配置され、ヘッドボルト通し孔２４に挿通するボルトによりシリンダブロックに締結することができる。   3 is a cross-sectional view of the cylinder head taken along line AA in FIG. Two intake ports 20 and two exhaust ports 22 are provided on the upper wall portion 12 of the combustion chamber shown in FIG. In addition, head bolt through holes 24 penetrating the outer wall portion of the cylinder head 10 are provided at the four corners of the upper wall portion 12 of the combustion chamber. The cylinder head 10 is disposed on the upper side of a cylinder block (not shown), and can be fastened to the cylinder block with a bolt inserted into the head bolt through hole 24.

［実施の形態１における特徴的構成］
次に、本実施形態のシリンダヘッドの特徴的構成について説明する。
図４は、図１のＡ−Ａ線に沿ったシリンダヘッドの横断面の特徴図である。図４に示すように、本実施の形態においては、シリンダヘッド１０の長手方向の両端部に追加柱５０が設けられている。詳細には、追加柱５０は、隣り合う２つのヘッドボルト通し孔２４を含む平面と点火プラグ取付け孔１４との間に配置されている。点火プラグ取付け孔１４と追加柱５０の間は冷却水通路１８と接続されており冷却水が流通する。 [Characteristic Configuration in Embodiment 1]
Next, a characteristic configuration of the cylinder head according to the present embodiment will be described.
FIG. 4 is a cross sectional characteristic view of the cylinder head taken along line AA in FIG. As shown in FIG. 4, in the present embodiment, additional columns 50 are provided at both ends in the longitudinal direction of the cylinder head 10. Specifically, the additional pillar 50 is disposed between the plane including the two adjacent head bolt through holes 24 and the spark plug mounting hole 14. Between the spark plug mounting hole 14 and the additional column 50, the cooling water passage 18 is connected, and the cooling water flows.

図５は、図２左側に配置された点火プラグ取付け孔１４の周辺図である。追加柱５０は、冷却水通路１８の上部壁２６ａと下部壁２６ｂに結合されている。追加柱５０の形状は、例えば円錐台を逆さにした形状である。   FIG. 5 is a peripheral view of the spark plug mounting hole 14 arranged on the left side of FIG. The additional column 50 is coupled to the upper wall 26 a and the lower wall 26 b of the cooling water passage 18. The shape of the additional column 50 is, for example, a shape in which a truncated cone is inverted.

図６は、図４左側に配置された点火プラグ取付け孔１４の周辺図である。冷却水通路１８は、柱状部５０から燃焼室の外縁に相当する部分に冷却水を流すことができる燃焼室外縁部冷却水通路５２を有している。また、上述した２つの排気ポート２２の間には隔壁が設けられている。排気ポート２２下流の排気弁近傍に位置する隔壁には、燃焼室外縁部冷却水通路５２と点火プラグ取付け孔１４の周囲の冷却水通路１８とを接続するＥＸ−ＥＸ間ドリルパス５４が設けられている。なお、本図において冷却水は右手方向に流される。   FIG. 6 is a peripheral view of the spark plug mounting hole 14 arranged on the left side of FIG. The cooling water passage 18 has a combustion chamber outer edge cooling water passage 52 through which cooling water can flow from the columnar portion 50 to a portion corresponding to the outer edge of the combustion chamber. A partition is provided between the two exhaust ports 22 described above. An EX-EX drill path 54 that connects the combustion chamber outer edge cooling water passage 52 and the cooling water passage 18 around the spark plug mounting hole 14 is provided in the partition wall located near the exhaust valve downstream of the exhaust port 22. Yes. In this figure, the cooling water flows in the right-hand direction.

［実施の形態１の効果］
以上のような構成によれば、点火プラグ取付け孔１４の近くに追加柱５０が配置されたことにより、点火プラグ取付け孔１４近傍の下部壁２６ｂに加わる燃焼圧による力の一部を追加柱５０に分散させることができる。力の分散により下部壁２６ｂの変形を抑えることができ、点火プラグ周りの応力集中を緩和することができる。また、点火プラグ周りの応力集中を緩和することで、十分な強度を確保しつつ燃焼室上部と点火プラグの近くに冷却水通路１８を配置することができる。燃焼室と点火プラグの近くに冷却水を流すことで冷却性能を高めることができる。
例えば、図７（点火プラグ取付け孔１４の周りの冷却水通路１８の拡大図）に示すように、追加柱５０を設けない場合には、点火プラグ周りの強度を確保するために冷却水通路１８を水路位置１００まで上げる必要が生じる。しかしながら、本発明で示される追加柱５０を設けた場合には、点火プラグ周りの応力を十分に緩和できるため、冷却水通路１８を水路位置１１０にすることができる。そのため、冷却水通路１８を燃焼室の近くに配置することができ冷却性能を向上させることができる。 [Effect of Embodiment 1]
According to the above configuration, since the additional column 50 is disposed near the spark plug mounting hole 14, part of the force due to the combustion pressure applied to the lower wall 26 b near the spark plug mounting hole 14 is added to the additional column 50. Can be dispersed. Due to the force distribution, the deformation of the lower wall 26b can be suppressed, and the stress concentration around the spark plug can be reduced. Further, by relaxing the stress concentration around the spark plug, the cooling water passage 18 can be disposed near the upper portion of the combustion chamber and the spark plug while ensuring sufficient strength. Cooling performance can be improved by flowing cooling water near the combustion chamber and the spark plug.
For example, as shown in FIG. 7 (enlarged view of the cooling water passage 18 around the spark plug mounting hole 14), when the additional column 50 is not provided, the cooling water passage 18 is secured in order to ensure the strength around the spark plug. Needs to be raised to the channel position 100. However, when the additional column 50 shown in the present invention is provided, the stress around the spark plug can be sufficiently relaxed, so that the cooling water passage 18 can be set at the water passage position 110. Therefore, the cooling water passage 18 can be disposed near the combustion chamber, and the cooling performance can be improved.

また、本実施形態の冷却水通路構造によれば、シリンダヘッド１０の長手方向の両端にのみ追加柱５０を配置する。シリンダヘッド１０に加わる応力は気筒間よりも端部に集中するため、応力が集中するシリンダヘッド１０の長手方向の両端に追加柱５０を配置することで効果的にシリンダヘッド１０の応力を緩和することができる。また、本実施形態の冷却水通路構造では、シリンダヘッド１０の他の気筒間には追加柱５０を配置しない。追加柱５０を必要以上に設けないことでシリンダヘッド１０の重量増加を抑えることができる。このため、本実施の形態によれば、追加柱５０に効果的に応力を分散させつつ、重量増加を抑えることができる。   Further, according to the cooling water passage structure of the present embodiment, the additional pillars 50 are arranged only at both ends in the longitudinal direction of the cylinder head 10. Since the stress applied to the cylinder head 10 is concentrated at the end rather than between the cylinders, the additional pillars 50 are disposed at both ends in the longitudinal direction of the cylinder head 10 where the stress is concentrated to effectively relieve the stress of the cylinder head 10. be able to. Further, in the cooling water passage structure of the present embodiment, no additional column 50 is disposed between the other cylinders of the cylinder head 10. By not providing the additional column 50 more than necessary, an increase in the weight of the cylinder head 10 can be suppressed. For this reason, according to the present embodiment, it is possible to suppress an increase in weight while effectively distributing the stress to the additional pillar 50.

また、本実施形態の冷却水通路構造によれば、冷却水通路１８の上流に設けられた追加柱５０により冷却水の流れが妨げられる。これにより、シリンダヘッド１０の中央を流れる水量は減少し、燃焼室外縁部冷却水通路５２を流れる水量が増加する。そのため、燃焼室外縁部冷却水通路５２からＥＸ−ＥＸ間ドリルパス５４に流れ込む冷却水の水量を増加させることができる。ＥＸ−ＥＸ間ドリルパス５４の冷却水の流量を増加させることで、高温の排気ガスが流れ出る排気口近傍の温度を効果的に下げることができる。そのため内燃機関の信頼性を向上させることができる。   Further, according to the cooling water passage structure of the present embodiment, the flow of the cooling water is hindered by the additional pillar 50 provided upstream of the cooling water passage 18. As a result, the amount of water flowing through the center of the cylinder head 10 decreases, and the amount of water flowing through the combustion chamber outer edge cooling water passage 52 increases. Therefore, the amount of cooling water flowing from the combustion chamber outer edge cooling water passage 52 into the EX-EX drill path 54 can be increased. By increasing the flow rate of the cooling water in the EX-EX drill path 54, the temperature in the vicinity of the exhaust port through which the high-temperature exhaust gas flows can be effectively lowered. Therefore, the reliability of the internal combustion engine can be improved.

ところで、上述した実施の形態１においては、追加柱５０を、シリンダヘッド１０の長手方向の両端部であって、隣り合う２つのヘッドボルト通し孔２４を含む平面よりも点火プラグ取付け孔１４の近くに配置しているが、この追加柱５０の配置はこれに限定されるものではない。例えば、シリンダヘッド１０の長手方向の両端部であれば、隣り合う２つのヘッドボルト通し孔２４の間や、当該ヘッドボルト通し孔２４の間よりもさらに端部に配置してもよい。   By the way, in the first embodiment described above, the additional pillars 50 are disposed at both ends in the longitudinal direction of the cylinder head 10 and closer to the spark plug mounting hole 14 than the plane including the two adjacent head bolt through holes 24. However, the arrangement of the additional pillar 50 is not limited to this. For example, as long as both ends of the cylinder head 10 in the longitudinal direction, the cylinder head 10 may be disposed at the end portion between two adjacent head bolt through holes 24 or between the head bolt through holes 24.

また、上述した実施の形態１においては、追加柱５０の形状を、円錐台を逆さにした形状としているが、この追加柱５０の形状はこれに限定されるものではない。例えば、円柱や楕円柱であってもよい。   Moreover, in Embodiment 1 mentioned above, although the shape of the additional pillar 50 is made into the shape which reversed the truncated cone, the shape of this additional pillar 50 is not limited to this. For example, a cylinder or an elliptic cylinder may be used.

尚、上述した実施の形態１においては、冷却水通路１８が前記第１の発明における「冷却水通路」に、追加柱５０が前記第１及び第２の発明における「柱状部」に、燃焼室外縁部冷却水通路５２が前記第３の発明における「燃焼室外縁部冷却水通路」に、ＥＸ−ＥＸ間ドリルパス５４が前記第３の発明における「排気ポート間冷却水通路」に、それぞれ相当している。   In the first embodiment described above, the cooling water passage 18 is the “cooling water passage” in the first invention, the additional column 50 is the “columnar portion” in the first and second inventions, and the outside of the combustion chamber. The edge cooling water passage 52 corresponds to the “combustion chamber outer edge cooling water passage” in the third invention, and the EX-EX drill path 54 corresponds to the “exhaust port cooling water passage” in the third invention. ing.

本発明の実施の形態１における内燃機関のシリンダヘッドの構造を示す図である。It is a figure which shows the structure of the cylinder head of the internal combustion engine in Embodiment 1 of this invention. 図１のＢ−Ｂ線に沿ったシリンダヘッドの縦断面図である。It is a longitudinal cross-sectional view of the cylinder head along the BB line of FIG. 図１のＡ−Ａ線に沿ったシリンダヘッドの横断面図である。FIG. 2 is a cross-sectional view of the cylinder head taken along line AA in FIG. 1. 図１のＡ−Ａ線に沿ったシリンダヘッドの横断面の特徴図である。FIG. 2 is a cross sectional characteristic view of the cylinder head taken along line AA in FIG. 1. 図２左側に配置された点火プラグ取付け孔１４の周辺図である。FIG. 3 is a peripheral view of a spark plug mounting hole 14 disposed on the left side of FIG. 2. 図４左側に配置された点火プラグ取付け孔１４の周辺図である。FIG. 5 is a peripheral view of a spark plug mounting hole 14 disposed on the left side of FIG. 4. 点火プラグ取付け孔１４の周りの冷却水通路１８の拡大図である。FIG. 3 is an enlarged view of a cooling water passage 18 around a spark plug attachment hole 14.

符号の説明Explanation of symbols

１０ シリンダヘッド
１２ 燃焼室の上壁部
１４ 点火プラグ取付け孔
１８ 冷却水通路
２０ 吸気ポート
２２ 排気ポート
２４ ヘッドボルト通し孔
２６ａ 上部壁
２６ｂ 下部壁
５０ 追加柱
５２ 燃焼室外縁部冷却水通路
５４ ＥＸ−ＥＸドリルパス DESCRIPTION OF SYMBOLS 10 Cylinder head 12 Upper wall part 14 of combustion chamber Spark plug mounting hole 18 Cooling water passage 20 Intake port 22 Exhaust port 24 Head bolt through hole 26a Upper wall 26b Lower wall 50 Additional column 52 Combustion chamber outer edge cooling water passage 54 EX- EX drill path

Claims (3)

燃焼室の四隅に相当する位置にヘッドボルト通し孔を有し、当該燃焼室の上部に相当する位置に点火プラグ取付け孔を備えたシリンダヘッドの冷却水通路構造において、
前記点火プラグ取付け孔の周囲に冷却水を流すことができる冷却水通路と、
前記冷却水通路の上部壁と下部壁とを結合する柱状部とを備え、
前記柱状部は、隣り合う２つの前記ヘッドボルト通し孔を含む平面と前記点火プラグ取付け孔との間に、前記点火プラグ取付け孔と距離を置いて配置されること、
を特徴とするシリンダヘッドの冷却水通路構造。 In the cooling water passage structure of the cylinder head having head bolt through holes at positions corresponding to the four corners of the combustion chamber and provided with spark plug mounting holes at positions corresponding to the upper portion of the combustion chamber,
A cooling water passage through which cooling water can flow around the spark plug mounting hole;
A columnar portion connecting the upper wall and the lower wall of the cooling water passage;
The columnar part is disposed at a distance from the spark plug mounting hole between a plane including the two adjacent head bolt through holes and the spark plug mounting hole,
A cooling water passage structure for a cylinder head. 前記点火プラグ取付け孔は、前記シリンダヘッドの長手方向に複数配置され、
前記柱状部は、前記シリンダヘッドの長手方向の両端にのみ配置されること、
を特徴とする請求項１記載のシリンダヘッドの冷却水通路構造。 A plurality of the spark plug mounting holes are arranged in the longitudinal direction of the cylinder head,
The columnar portions are disposed only at both ends in the longitudinal direction of the cylinder head;
The cooling water passage structure for a cylinder head according to claim 1. 前記シリンダヘッドは、燃焼室の上部に相当する位置に複数の排気ポートを備え、
前記冷却水通路は、前記柱状部から燃焼室の外縁に相当する部分に冷却水を流すことができる燃焼室外縁部冷却水通路を有し、
前記排気ポート間において、前記燃焼室外縁部冷却水通路と、前記点火プラグ取付け孔の周囲の冷却水通路とを接続する排気ポート間冷却水通路、
を備えることを特徴とする請求項１又は２記載のシリンダヘッドの冷却水通路構造。 The cylinder head includes a plurality of exhaust ports at a position corresponding to the upper part of the combustion chamber,
The cooling water passage has a combustion chamber outer edge cooling water passage through which cooling water can flow from the columnar portion to a portion corresponding to the outer edge of the combustion chamber,
Between the exhaust ports, a cooling water passage between the exhaust ports that connects the combustion chamber outer edge cooling water passage and a cooling water passage around the spark plug mounting hole,
The cooling water passage structure of a cylinder head according to claim 1 or 2, characterized by comprising:
JP2008115437A 2008-04-25 2008-04-25 Cylinder head cooling water passage structure Expired - Fee Related JP5035095B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008115437A JP5035095B2 (en) 2008-04-25 2008-04-25 Cylinder head cooling water passage structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008115437A JP5035095B2 (en) 2008-04-25 2008-04-25 Cylinder head cooling water passage structure

Publications (2)

Publication Number Publication Date
JP2009264260A true JP2009264260A (en) 2009-11-12
JP5035095B2 JP5035095B2 (en) 2012-09-26

Family

ID=41390404

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008115437A Expired - Fee Related JP5035095B2 (en) 2008-04-25 2008-04-25 Cylinder head cooling water passage structure

Country Status (1)

Country Link
JP (1) JP5035095B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012140722A1 (en) 2011-04-11 2012-10-18 トヨタ自動車 株式会社 Cylinder head of internal combustion engine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD1024133S1 (en) 2020-06-24 2024-04-23 Caterpillar Inc. Cylinder head

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0639078Y2 (en) * 1988-01-19 1994-10-12 トヨタ自動車株式会社 Cooling water passage structure of cylinder head of internal combustion engine
JPH09195846A (en) * 1996-01-19 1997-07-29 Toyota Motor Corp Cylinder head structure of multicylinder internal combustion engine
JP2002070642A (en) * 2000-08-25 2002-03-08 Honda Motor Co Ltd Cylinder head for multicylinder engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0639078Y2 (en) * 1988-01-19 1994-10-12 トヨタ自動車株式会社 Cooling water passage structure of cylinder head of internal combustion engine
JPH09195846A (en) * 1996-01-19 1997-07-29 Toyota Motor Corp Cylinder head structure of multicylinder internal combustion engine
JP2002070642A (en) * 2000-08-25 2002-03-08 Honda Motor Co Ltd Cylinder head for multicylinder engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012140722A1 (en) 2011-04-11 2012-10-18 トヨタ自動車 株式会社 Cylinder head of internal combustion engine
US8904975B2 (en) 2011-04-11 2014-12-09 Toyota Jidosha Kabushiki Kaisha Cylinder head of internal combustion engine

Also Published As

Publication number Publication date
JP5035095B2 (en) 2012-09-26

Similar Documents

Publication Publication Date Title
JP4438643B2 (en) Engine cylinder head structure
US10107171B2 (en) Cooling structure of internal combustion engine
JP6205730B2 (en) cylinder head
JP4788236B2 (en) Cylinder head cooling structure
JP2007278065A (en) Cooling structure of exhaust manifold integrated type cylinder head
JP2012189076A (en) Cylinder head for internal combustion engine, with integrated exhaust manifold and subgroups of exhaust conduits merging into manifold portions which are superimposed and spaced apart from each other
US20150167583A1 (en) Exhaust passage structure for internal combustion engine
EP2698522B1 (en) Cylinder head of internal combustion engine
JP5035095B2 (en) Cylinder head cooling water passage structure
JP2007162591A (en) Cylinder head of internal combustion engine
JP2015010598A (en) Engine and saddle type vehicle
JP2008014263A (en) Cooling structure for internal combustion engine and cylinder head gasket used for same
JP6696125B2 (en) Cylinder head cooling structure
JP2017031890A (en) cylinder head
JP2008095616A (en) Water jacket for cylinder head
JP4382508B2 (en) Exhaust manifold cooling structure
JP2017203430A (en) Cylinder head for internal combustion engine
KR101405177B1 (en) Engine that exhaust manifold and cylinder head are integrally fomred
JP2008150960A (en) Cylinder block for multi-cylinder internal combustion engine
JP2019173563A (en) Water jacket spacer
JP2015190351A (en) Multicylinder internal combustion engine
JP6057703B2 (en) Flow path
CN211737306U (en) Cooling jacket and cylinder head comprising same
KR101198790B1 (en) Engine that water jacket is formed
JP2009197725A (en) Cylinder head of internal combustion engine

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20100909

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110926

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20111004

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20111125

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: 20120605

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20120618

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150713

Year of fee payment: 3

R151 Written notification of patent or utility model registration

Ref document number: 5035095

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150713

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees