JPH0460159A - Cylinder head of engine - Google Patents
Cylinder head of engineInfo
- Publication number
- JPH0460159A JPH0460159A JP17228290A JP17228290A JPH0460159A JP H0460159 A JPH0460159 A JP H0460159A JP 17228290 A JP17228290 A JP 17228290A JP 17228290 A JP17228290 A JP 17228290A JP H0460159 A JPH0460159 A JP H0460159A
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- cylinder head
- wall
- cylinder
- water passage
- 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.)
- Pending
Links
- 239000000498 cooling water Substances 0.000 claims abstract description 131
- 238000002485 combustion reaction Methods 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 abstract description 7
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 238000011144 upstream manufacturing Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はエンジンのシリンダヘッドに関する。[Detailed description of the invention] (Industrial application field) The present invention relates to an engine cylinder head.
（従来の技術）
エンジンのシリンダヘッドとしては、該シリンダヘッド
を冷却するため、シリンダヘッド本体の内部に冷却水を
流通させるための冷却水通路を設け、シリンダブロック
を流通した後の冷却水をシリンダヘッド下面に形成した
流入口から上記冷却水通路に導く構造のものが知られて
いる。(Prior Art) In order to cool the cylinder head of an engine, a cooling water passage for circulating cooling water is provided inside the cylinder head body, and the cooling water after flowing through the cylinder block is transferred to the cylinder. A structure is known in which the cooling water is led to the cooling water passage from an inlet formed on the lower surface of the head.
ところで、エンジン燃焼時におけるシリンダヘッド本体
の温度分布は一様ではなく、例えばシリンダブロックの
燃焼室と接する燃焼室上壁及び燃焼後の高温の排気ガス
が流通する排気ポート壁は他の部分よりも高温化すると
いう特性を有している。By the way, the temperature distribution of the cylinder head body during engine combustion is not uniform; for example, the upper wall of the combustion chamber in contact with the combustion chamber of the cylinder block and the exhaust port wall through which high-temperature exhaust gas flows after combustion are higher than other parts. It has the property of heating up.
そこで、実開昭５４−１６１４０８号公報に示されるシ
リンダヘッドのように、冷却水通路内における燃焼室上
壁近傍の壁面或いは排気ポート近傍の壁面に冷却水を案
内するリブを設け、流入口から流入した冷却水を燃焼室
上壁近傍及び排気ポート壁近傍に効率的に流通させる構
造のものが提案されている。Therefore, as in the cylinder head shown in Japanese Utility Model Application Publication No. 54-161408, a rib is provided to guide the cooling water on the wall near the upper wall of the combustion chamber in the cooling water passage or on the wall near the exhaust port. A structure has been proposed that allows the inflowing cooling water to efficiently flow near the upper wall of the combustion chamber and near the exhaust port wall.
（発明が解決しようとする課題）
しかるに、シリンダヘッドにお−いては、シリンダヘッ
ド本体内の各所に形成される壁部をくまなく冷却する必
要性から冷却水通路の分岐部及び集合部が多くなると共
に、複雑な内部構造を有するシリンダヘッドの性質上、
冷却水通路において局部的に断面積が大きくなる箇所の
発生が避けられなかった。このため、分岐部、集合部或
いは断面積の大きい箇所で冷却水の淀みが生じ、シリン
ダヘッドに対する冷却性能の向上に限界があった。(Problem to be Solved by the Invention) However, in the cylinder head, there are many branching parts and convergence parts of the cooling water passage due to the need to thoroughly cool the walls formed at various places in the cylinder head body. In addition, due to the nature of the cylinder head, which has a complex internal structure,
The occurrence of locally large cross-sectional areas in the cooling water passages was unavoidable. As a result, cooling water stagnates at branching portions, converging portions, or locations with large cross-sectional areas, which limits the ability to improve cooling performance for the cylinder head.
上記に鑑みて、本発明は、冷却水通路を流通する冷却水
が淀まないようにして、シリンダヘッドに対する冷却性
能を向上させることを目的とする。In view of the above, an object of the present invention is to improve the cooling performance for the cylinder head by preventing the cooling water flowing through the cooling water passage from stagnation.
（課題を解決するための手段）
上記の目的を達成するため、請求項（１）の発明は、シ
リンダヘッド内の冷却水通路を上下の２系統にし、冷却
水通路の分岐部や集合部を少なくすると共に冷却水通路
に断面積が局部的に大きくなる箇所を生じさせないもの
である。(Means for Solving the Problems) In order to achieve the above object, the invention of claim (1) has two systems of cooling water passages, upper and lower, in the cylinder head, and the branching parts and gathering parts of the cooling water passages are divided into two systems, upper and lower. In addition to reducing the amount of water used, the cooling water passage does not have any portions where the cross-sectional area becomes locally large.
具体的に請求項（１）の本発明が講じた解決手段は、シ
リンダヘッド本体の下部に設けられ、冷却水を燃焼室上
壁の上方部、吸気ポート壁の下方部、排気ポート壁の下
方部及び点火プラグ用ホール壁下部の外周部に各々流通
させる第１冷却水通路と、上記シリンダヘッド本体の上
部に設けられ、冷却水を排気ポート壁の上方部に流通さ
せる第２冷却水通路と、上記シリンダヘッド本体の下面
に設けられ、シリンダブロックからの冷却水を上記第１
冷却水通路に導入する第１流入口と、上記シリンダヘッ
ド本体の下面における上記第１流入口と異なる位置に設
けられ、シリンダブロックから冷却水を上記第２冷却水
通路に導入する第２流入口とを備える構成とするもので
ある。Specifically, the solution taken by the present invention of claim (1) is that the cooling water is provided at the lower part of the cylinder head body, and the cooling water is directed to the upper part of the upper wall of the combustion chamber, the lower part of the intake port wall, and the lower part of the exhaust port wall. and a second cooling water passage provided in the upper part of the cylinder head body and allowing the cooling water to flow to the upper part of the exhaust port wall. , is provided on the lower surface of the cylinder head main body to direct the cooling water from the cylinder block to the first
a first inlet that introduces the cooling water into the cooling water passage; and a second inlet that is provided at a different position from the first inlet on the lower surface of the cylinder head body and that introduces the cooling water from the cylinder block into the second cooling water passage. The configuration includes the following.
また、請求項（２の発明では、第１冷却水通路を流通す
る冷却水で熱負荷が大きい箇所を効果的に冷却するため
、第１冷却水通路を該第１冷却水通路を流通する冷却水
の流量が上記第２冷却水通路を流通する冷却水の流量よ
りも多くなるよう形成するものである。In addition, in the invention of claim 2, in order to effectively cool a location with a large heat load with the cooling water flowing through the first cooling water passage, the cooling water flowing through the first cooling water passage is The flow rate of water is formed to be larger than the flow rate of cooling water flowing through the second cooling water passage.
さらに、請求項（３）の発明では、第１冷却水通路に第
２冷却水通路よりも多量の冷却水を導入すると共に各気
筒を略均等に冷却するため、気筒毎に２つの排気ポート
を備えたシリンダヘッドを前提とし、第１流入口は気筒
毎に２か所ずつ各排気ポート壁の下方に設けられ、上記
第２流入口は気筒毎に１か所ずつ当該気筒に対応する上
記第１流入口同士の間に設けられ、上記第１及び第２冷
却水通路は各々冷却水が排気側から吸気側へ流通するよ
うに設けられている構成とするものである。Furthermore, in the invention of claim (3), in order to introduce a larger amount of cooling water into the first cooling water passage than into the second cooling water passage and to cool each cylinder substantially equally, two exhaust ports are provided for each cylinder. The first inlet is provided at two locations below each exhaust port wall for each cylinder, and the second inlet is provided at one location for each cylinder at the lower part of the exhaust port wall corresponding to the cylinder. The first and second cooling water passages are provided between the two inlets, and each of the first and second cooling water passages is configured to allow cooling water to flow from the exhaust side to the intake side.
（作用）
請求項（１）の発明の構成により、シリンダヘッド本体
に別系統の第１及び第２冷却水通路を設けたため、冷却
水通路に分岐部、集合部或いは断面積が局部的に大きく
なる箇所が減少する。(Function) According to the structure of the invention of claim (1), since the first and second cooling water passages of separate systems are provided in the cylinder head main body, the cooling water passage has a branching part, a gathering part, or a locally large cross-sectional area. The number of places where this occurs will decrease.
また、シリンダヘッド本体の下部に第１冷却水通路を、
上部に第２冷却水通路を各々設け、第１冷却水通路を流
通する冷却水で、高温化し熱負荷が大きい燃焼室上壁、
点火プラグ用ホール壁の下部及び吸・排気ポート壁の下
部を集中的に冷却し、第２冷却水通路を流通する冷却水
で比較的熱負荷が小さい部分を冷却するようにしたため
、冷却水の流量をシリンダヘッド本体各部の熱負荷に対
応してきめ細かく設定することができる。In addition, a first cooling water passage is installed at the bottom of the cylinder head body.
A second cooling water passage is provided in the upper part, and the upper wall of the combustion chamber is heated to a high temperature and has a large heat load due to the cooling water flowing through the first cooling water passage.
The lower part of the spark plug hole wall and the lower part of the intake/exhaust port wall are intensively cooled, and the cooling water flowing through the second cooling water passage cools the parts with relatively small heat load. The flow rate can be precisely set in accordance with the heat load on each part of the cylinder head body.
（実施例） 以下、本発明の実施例を図面に基づいて説明する。(Example) Embodiments of the present invention will be described below based on the drawings.
第１及び第２図は各々本発明の一実施例に係るエンジン
のシリンダヘッドＡの縦断面構造を、第３図は該シリン
ダヘッドＡの底面構造を各々示しており、シリンダヘッ
ドＡは、直列４気筒、吸気２弁、排気２弁のエンジンに
おけるシリンダブロック（図示していない）に組み付け
られるものであって、該シリンダヘッドＡの上にはカム
キャ・ツブＢ及びヘッドカバーＣが各々組み付けられて
いる。1 and 2 each show a vertical cross-sectional structure of a cylinder head A of an engine according to an embodiment of the present invention, and FIG. 3 shows a bottom structure of the cylinder head A. It is assembled into a cylinder block (not shown) in a 4-cylinder, 2-valve intake, 2-valve exhaust engine, and a camshaft knob B and a head cover C are each assembled on top of the cylinder head A. .
第３図に示すように、シリンダヘッド本体１０には、気
筒毎に、吸気側（第１図及び第２図における右側、第３
図における下側）に各２つの独立した吸気ポート１２．
１２が、排気側に各２つの独立した排気ポート１４．１
４か各々気筒列方向に設けられている。また、シリンダ
ヘッド本体１０における吸気ポート１２．１２と排気ポ
ート１４１４とで囲まれた部分、つまり各気筒のボア中
心部と対応する部位には、点火プラグを取り付けるため
の点火プラグ用ホール１６か設けられている。As shown in FIG. 3, the cylinder head body 10 is provided with an intake side (on the right side in FIGS. 1 and 2, on the 3rd side in FIGS.
Two independent intake ports 12.
12, each with two independent exhaust ports 14.1 on the exhaust side
Each of the four cylinders is provided in the direction of the cylinder row. Further, a spark plug hole 16 for installing a spark plug is provided in a portion of the cylinder head body 10 surrounded by the intake port 12.12 and the exhaust port 1414, that is, a portion corresponding to the bore center of each cylinder. It is being
第１図及び第２図に示すように、シリンダヘッド本体１
０内の下部には気筒毎に排気側から吸気側に延びる第１
冷却水通路１８か設けられており、該第１冷却水通路１
８は、シリンダブロックとの合せ面であるシリンダヘッ
ド本体１０の下面２０における各排気ポート１４の下方
で開口し、冷却水をシリンダブロックのウォータージャ
ケットから導入するだめの２つの第１流入口２４．２４
と連通している。第１冷却水通路１８は、排気側のシリ
ンダブロック本体１０の下面２０の上方部１８ａで気筒
列方向に拡がり、排気ポート１４の上流部１４ａの壁の
下方部１８ｂで２つの排気ポート１４．１４の上流部１
４ａの間と両側へ分岐した後、燃焼室上壁の上方部１８
ｃ及び点火プラグ用ホール１６の下部の壁の外周部１８
ｄで集合し、さらに２つの吸気ポート１２．１２の下流
部］２ａの間及び両側へ分岐した後、吸気ポート］２の
壁の下方部１８ｅで集合し、さらに吸気ポート１２の壁
の下方を該吸気ポート１２に沿って上昇した後、集合部
２５で他の気筒の第１冷却水通路１８と集合している。As shown in FIGS. 1 and 2, the cylinder head body 1
At the bottom of the 0, there is a first cylinder extending from the exhaust side to the intake side for each cylinder.
A cooling water passage 18 is provided, and the first cooling water passage 1
8 are two first inflow ports 24.8 that open below each exhaust port 14 on the lower surface 20 of the cylinder head body 10, which is the mating surface with the cylinder block, and are for introducing cooling water from the water jacket of the cylinder block. 24
It communicates with The first cooling water passage 18 expands in the cylinder row direction at the upper part 18a of the lower surface 20 of the cylinder block main body 10 on the exhaust side, and connects the two exhaust ports 14.14 to the lower part 18b of the wall of the upstream part 14a of the exhaust port 14. upstream part 1
4a and after branching to both sides, the upper part 18 of the upper wall of the combustion chamber
c and outer periphery 18 of the lower wall of the spark plug hole 16
d, and after branching between the two intake ports 12 and 12 downstream and to both sides, converge at the lower part 18e of the wall of the intake port 2, and further downstream of the intake port 12. After rising along the intake port 12, it converges with the first cooling water passages 18 of other cylinders at a converging portion 25.
そして、２つの第１流入口２４．２４から第１冷却水通
路１８に流入した冷却水は、シリンダブロックの燃焼室
の熱で高温化し熱負荷が大きい燃焼室上壁及び点火プラ
グ用ホール１−６の壁の下部、高温の排気ガスに接し高
温化した排気ポート１４の壁の下部を各々冷却する。The cooling water that has flowed into the first cooling water passage 18 from the two first inlets 24, 24 becomes hot due to the heat of the combustion chamber of the cylinder block, and the upper wall of the combustion chamber with a large heat load and the spark plug hole 1- The lower part of the wall of the exhaust port 6 and the lower part of the wall of the exhaust port 14, which has become hot due to contact with the high-temperature exhaust gas, are cooled.
一方、シリンダヘッド本体１０内の上部には気筒毎に排
気側から吸気側に延びる第２冷却水通路２６が設けられ
ており、該第２冷却水通路２６は、２つの第１流入口２
４．２４の間におけるシリンダヘッド本体１０の下面２
０で開口し、冷却水をシリンダブロックのウォータージ
ャケットから導入するための第２流入口２８と連通して
いる。第２冷却水通路２６は、２つの排気ポート１４．
１４同士の間を上昇し、排気ポート１４の下流部１４ｂ
の壁の上方部２６ａ１点火プラグ用ホール１６の壁上部
の外周部２６ｂ１及び吸気ポート１２の上流部１２ｂの
壁の上方部２６ｃを各々通過し、２つの吸気ポート１２
．１２同士の間を下降し、集合部２５で他の気筒の第２
冷却水通路２６と集合する共に、該集合部２５で上記各
第１冷却水通路１８とも集合している。On the other hand, a second cooling water passage 26 is provided in the upper part of the cylinder head body 10 for each cylinder, extending from the exhaust side to the intake side.
4. The lower surface 2 of the cylinder head body 10 between 24
It opens at 0 and communicates with a second inlet 28 for introducing cooling water from the water jacket of the cylinder block. The second cooling water passage 26 has two exhaust ports 14.
14 and downstream part 14b of the exhaust port 14.
The two intake ports 12
．． 12, and at the gathering part 25, the second cylinder of the other cylinder
It converges with the cooling water passage 26 and also converges with each of the first cooling water passages 18 at the convergence portion 25 .
そして、第２流入口２８から第２冷却水通路２６に流入
した冷却水は、排気ポート１４の壁、吸気ポート１２の
壁及び点火プラグ用ホール１６の壁の各々の上部を冷却
する。The cooling water flowing into the second cooling water passage 26 from the second inlet 28 cools the upper portions of the walls of the exhaust port 14, the wall of the intake port 12, and the wall of the spark plug hole 16.
尚、第１図及び第３図において、３２は冷却水をシリン
ダブロックからシリンダヘッド内に導入する第３流入口
であって、該第３流入口から導入された冷却水はシリン
ダヘッド本体１０を冷却することなく、集合部２５を流
出口側に流通する。In FIGS. 1 and 3, 32 is a third inlet for introducing cooling water into the cylinder head from the cylinder block, and the cooling water introduced from the third inlet flows into the cylinder head body 10. The water flows through the collecting portion 25 to the outlet side without being cooled.
上記のように、シリンダヘッド本体１０内を流通する冷
却水の通路を２系統にしたため、冷却水通路において分
岐部、集合部或いは断面積の局部的に大きい箇所が形成
され難いため、冷却水が淀まなくなるので、シリンダヘ
ッドの内部を効率良く冷却できる。As mentioned above, since the cooling water passages flowing inside the cylinder head body 10 are divided into two systems, it is difficult to form a branch part, a gathering part, or a locally large cross-sectional area in the cooling water passage. Since there is no stagnation, the inside of the cylinder head can be efficiently cooled.
また、冷却水の通路を上下の２系統にし、第１冷却水通
路１８を流通する冷却水で高温化し易く熱負荷の大きい
シリンダヘッド本体１０の燃焼室上壁、点火プラグ用ホ
ール１６の壁の下部、吸・排気ポート１４の壁の下部を
冷却し、第２冷却水通路２６を流通する冷却水で比較的
熱負荷の小さい部分を冷却するため、冷却水の流量を熱
負荷に対応してきめ細かく設定することができるので、
冷却効率が向上する。このため、熱負荷の大きい部分を
冷却する第１冷却水通路１８の断面積を第２冷却水通路
２６の断面積よりも大きくする設定し、第１冷却水通路
１８を流通する冷却水の流量が第２冷却水通路２６を流
通する冷却水の流量よりも多くなるよう形成することが
好ましい。In addition, the cooling water passages are divided into two systems, upper and lower, so that the upper wall of the combustion chamber of the cylinder head body 10 and the wall of the spark plug hole 16, which easily heat up to high temperatures due to the cooling water flowing through the first cooling water passage 18 and have a large heat load, and the wall of the spark plug hole 16. In order to cool the lower part of the wall of the intake/exhaust port 14, and to cool the part with a relatively small heat load with the cooling water flowing through the second cooling water passage 26, the flow rate of the cooling water is adjusted according to the heat load. Since you can make detailed settings,
Cooling efficiency is improved. For this reason, the cross-sectional area of the first cooling water passage 18 that cools the portion with a large heat load is set to be larger than the cross-sectional area of the second cooling water passage 26, and the flow rate of the cooling water flowing through the first cooling water passage 18 is set to be larger than the cross-sectional area of the second cooling water passage 26. It is preferable that the flow rate of the cooling water is larger than the flow rate of the cooling water flowing through the second cooling water passage 26.
さらに、本実施例では、第１及び第２冷却水通路１８．
２６を気筒毎に独立させて冷却水を排気側から吸気側に
流通させるようにしたため、各気筒を略均等に冷却する
ことができると共に、熱負荷の大きい排気側を効果的に
冷却することができる。Furthermore, in this embodiment, the first and second cooling water passages 18.
26 for each cylinder independently to allow cooling water to flow from the exhaust side to the intake side, it is possible to cool each cylinder almost equally, and the exhaust side, which has a large heat load, can be effectively cooled. can.
尚、上記実施例では、第１及び第２冷却水通路１８．２
６を各々排気側から吸気側に延びる方向に設けたが、こ
れに代えて気筒列方向に設けてもよい。In the above embodiment, the first and second cooling water passages 18.2
6 are provided in the direction extending from the exhaust side to the intake side, but they may be provided in the cylinder row direction instead.
（発明の効果）
以上説明したように請求項（１）の発明に係るエンジン
のシリンダヘッドによると、シリンダヘッド本体の下部
に第１冷却水通路を、上部に第２冷却水通路を各々設け
て冷却水通路を上下の２系統にしたため、冷却水通路に
おける分岐部、集合部或いは断面積の局部的に大きくな
る箇所が減少し、冷却水が淀まなくなるので冷却性能が
向上し、また、第１冷却水通路を流通する冷却水で熱負
荷か大きい燃焼室上壁、点火プラグ用ホールの壁の下部
、吸・排気ポートの壁の下部を冷却し、第２冷却水通路
を流通する冷却水で比較的熱負荷が小さい部分を冷却す
るようにしたため、冷却水の流量を熱負荷に対応してき
め細かく設定することができるので冷却効率が向上する
。(Effects of the Invention) As explained above, according to the engine cylinder head according to the invention of claim (1), the first cooling water passage is provided in the lower part of the cylinder head body, and the second cooling water passage is provided in the upper part. Since the cooling water passage is divided into two systems, upper and lower, the number of branching parts, gathering parts, or places where the cross-sectional area becomes locally large in the cooling water passage is reduced, and the cooling water does not stagnate, improving cooling performance. The cooling water that flows through the first cooling water passage cools the upper wall of the combustion chamber with a large heat load, the lower part of the wall of the spark plug hole, and the lower part of the wall of the intake and exhaust ports, and the cooling water that flows through the second cooling water passage. Since the parts with a relatively small heat load are cooled, the flow rate of cooling water can be finely set in accordance with the heat load, improving cooling efficiency.
また、請求項（２）の発明に係るエンジンのシリンダヘ
ッドによると、第１冷却水通路を該第１冷却水通路を流
通する冷却水の流量が第２冷却水通路を流通する冷却水
の流量よりも多くなるよう形成したため、第１冷却水通
路を流通する冷却水で熱負荷が大きい箇所を集中的に冷
却することができるので、冷却性能が一層向上する。Further, according to the engine cylinder head according to the invention of claim (2), the flow rate of the cooling water flowing through the first cooling water passage is equal to the flow rate of the cooling water flowing through the second cooling water passage. Since the cooling water flowing through the first cooling water passage is formed so as to be larger than the number of cooling water passages, the cooling water flowing through the first cooling water passage can intensively cool a portion with a large heat load, so that the cooling performance is further improved.
また、請求項（３）の発明に係るエンジンのシリンダヘ
ッドによると、気筒毎に、第１流入口を２か所ずつ、第
２流入口を１か所ずつ設けたため、第１冷却水通路に第
２冷却水通路よりも多量の冷却水を導入することができ
るので、熱負荷が大きい箇所を一層集中的に冷却するこ
とができ、さらに第１及び第２冷却水通路を各々冷却水
が排気側から吸気側に流通するよう設けたため、各気筒
を略均等に冷却することができる。Further, according to the engine cylinder head according to the invention of claim (3), each cylinder is provided with two first inlets and one second inlet, so that the first cooling water passage is provided with two first inlets and one second inlet. Since a larger amount of cooling water can be introduced than the second cooling water passage, areas with a large heat load can be cooled more intensively, and the cooling water can be exhausted from the first and second cooling water passages respectively. Since it is provided so that the air flows from the side to the intake side, each cylinder can be cooled almost equally.
第１図〜第３図は本発明の一実施例であるエンジンのシ
リンダヘッドを示し、第１図は第３図におけるＩ−１線
断面図、第２図は第３図における■−■線断面図、第３
図は底面図である。
Ａ・・・シリンダヘッド
１０・・・シリンダヘッド本体
１２・・・吸気ポート
１４・・・排気ポート
１８・・・第１冷却水通路
１８ａ・・・シリンダヘッド本体下面の上方部１８ｂ・
・・排気ポート壁の下方部
１８ｃ・・・燃焼室上壁の上方部
ｉ８ｄ・・−点火プラグ用ホール壁下部の外周部１８ｅ
・・・吸気ボート壁の下方部
２０・・・シリンダヘッド本体の下面
２４・・・第１流入口
２６・・・第２冷却水通路
２６ａ・・・排気ポート壁の上方部
２８・・・第２流入口
Ａ
】 Ｏ
ユ４
１、８ ａ
１、８ ｂ
８ｃ
８ｄ
１、８ ｅ
ノリツタヘッド
／リンダヘット本体
吸気ポート
排気ポート
第コ玲却水通路
シリンダヘッド本体下面の上方部
・排気ポート壁の下方部
燃焼室上壁の上方部
点火プラグ用ホール壁下部の外周部
吸気ポート壁の下方部
シリンダヘット本体の上首
第コ流入口
第２４却水連路
υＦ気ポート壁の上方部
第２流入口
も１図1 to 3 show a cylinder head of an engine that is an embodiment of the present invention, FIG. 1 is a sectional view taken along line I-1 in FIG. 3, and FIG. 2 is a sectional view taken along line ■-■ in FIG. 3. Cross section, 3rd
The figure is a bottom view. A... Cylinder head 10... Cylinder head body 12... Intake port 14... Exhaust port 18... First cooling water passage 18a... Upper part 18b of the lower surface of the cylinder head main body.
...Lower part 18c of exhaust port wall...Upper part i8d of upper wall of combustion chamber...-Outer peripheral part 18e of lower part of spark plug hole wall
... lower part of intake boat wall 20 ... lower surface of cylinder head main body 24 ... first inlet 26 ... second cooling water passage 26a ... upper part of exhaust port wall 28 ... 2 Inlet A] O Yu 4 1, 8 a 1, 8 b 8c 8d 1, 8 e Noritsuta head/cylinder head main body intake port exhaust port No. 1 cooling water passage upper part of the lower surface of the cylinder head body/lower part of the exhaust port wall Upper part of the upper wall of the combustion chamber. The outer periphery of the lower part of the spark plug hole wall. The lower part of the intake port wall. The upper part of the cylinder head body. Figure 1
Claims (3)
燃焼室上壁の上方部、吸気ポート壁の下方部、排気ポー
ト壁の下方部及び点火プラグ用ホール壁下部の外周部に
各々流通させる第１冷却水通路と、 上記シリンダヘッド本体の上部に設けられ、冷却水を排
気ポート壁の上方部に流通させる第２冷却水通路と、 上記シリンダヘッド本体の下面に設けられ、シリンダブ
ロックからの冷却水を上記第１冷却水通路に導入する第
１流入口と、 上記シリンダヘッド本体の下面における上記第１流入口
と異なる位置に設けられ、シリンダブロックから冷却水
を上記第２冷却水通路に導入する第２流入口とを備えた
ことを特徴とするエンジンのシリンダヘッド。(1) Provided at the lower part of the cylinder head body, and allows cooling water to flow to the upper part of the upper wall of the combustion chamber, the lower part of the intake port wall, the lower part of the exhaust port wall, and the outer periphery of the lower part of the spark plug hole wall. a first cooling water passage; a second cooling water passage, which is provided in the upper part of the cylinder head body and allows the cooling water to flow to the upper part of the exhaust port wall; and a second cooling water passage which is provided in the lower surface of the cylinder head body and which allows the cooling water to flow from the cylinder block to the upper part of the cylinder head body. A first inlet that introduces cooling water into the first cooling water passage; and a first inlet that is provided at a position different from the first inlet on the lower surface of the cylinder head body, and which introduces cooling water from the cylinder block into the second cooling water passage. A cylinder head for an engine, characterized in that it is equipped with a second inlet for introducing the air.
する冷却水の流量が上記第２冷却水通路を流通する冷却
水の流量よりも多くなるよう形成されていることを特徴
とする請求項（１）に記載のエンジンのシリンダヘッド
。(2) The first cooling water passage is formed such that the flow rate of cooling water flowing through the first cooling water passage is greater than the flow rate of cooling water flowing through the second cooling water passage. A cylinder head for an engine according to claim (1).
１流入口は気筒毎に２か所ずつ各排気ポート壁の下方に
設けられ、上記第２流入口は気筒毎に１か所ずつ当該気
筒に対応する上記第１流入口同士の間に設けられ、上記
第１及び第２冷却水通路は各々冷却水が排気側から吸気
側へ流通するように設けられていることを特徴とする請
求項（１）又は（２）に記載のエンジンのシリンダヘッ
ド。(3) Each cylinder is provided with two exhaust ports, the first inlet is provided at two locations below each exhaust port wall for each cylinder, and the second inlet is provided at one location for each cylinder. Each of the first and second cooling water passages is provided between the first inlets corresponding to each cylinder, and each of the first and second cooling water passages is provided so that the cooling water flows from the exhaust side to the intake side. The engine cylinder head according to claim (1) or (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17228290A JPH0460159A (en) | 1990-06-28 | 1990-06-28 | Cylinder head of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17228290A JPH0460159A (en) | 1990-06-28 | 1990-06-28 | Cylinder head of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0460159A true JPH0460159A (en) | 1992-02-26 |
Family
ID=15939035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17228290A Pending JPH0460159A (en) | 1990-06-28 | 1990-06-28 | Cylinder head of engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0460159A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016094872A (en) * | 2014-11-13 | 2016-05-26 | トヨタ自動車株式会社 | Cylinder head |
| JP2016094873A (en) * | 2014-11-13 | 2016-05-26 | トヨタ自動車株式会社 | Cylinder head |
| CN106150745A (en) * | 2015-05-15 | 2016-11-23 | 丰田自动车株式会社 | Cylinder cover |
-
1990
- 1990-06-28 JP JP17228290A patent/JPH0460159A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016094872A (en) * | 2014-11-13 | 2016-05-26 | トヨタ自動車株式会社 | Cylinder head |
| JP2016094873A (en) * | 2014-11-13 | 2016-05-26 | トヨタ自動車株式会社 | Cylinder head |
| US10738680B2 (en) | 2014-11-13 | 2020-08-11 | Toyota Jidosha Kabushiki Kaisha | Cylinder head of multi-cylinder engine |
| CN106150745A (en) * | 2015-05-15 | 2016-11-23 | 丰田自动车株式会社 | Cylinder cover |
| JP2016217191A (en) * | 2015-05-15 | 2016-12-22 | トヨタ自動車株式会社 | Cylinder head |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4438643B2 (en) | Engine cylinder head structure | |
| US7051685B2 (en) | Cylinder head with integrated exhaust manifold | |
| JP3155993B2 (en) | Cylinder head cooling structure for multi-valve engine | |
| JPH0140218B2 (en) | ||
| JPS6232264A (en) | Cooling water passage structure in cylinder head of internal-combustion engine | |
| US7152566B2 (en) | Cylinder head structure | |
| US5868106A (en) | Cylinderhead of a multicylinder internal combustion engine | |
| KR100482120B1 (en) | water jacket for cylinder head | |
| JPS60125716A (en) | Cooling water passage of internal-combustion engine | |
| JPH04231655A (en) | Engine cooling device | |
| CN111852683A (en) | Cylinder head cooling structure, engine cooling structure and engine | |
| JP3073275B2 (en) | Cylinder head of water-cooled internal combustion engine | |
| JPS61175217A (en) | Cooling structure for cylinder head | |
| JPH0460159A (en) | Cylinder head of engine | |
| KR100921127B1 (en) | Coolant cross flow pattern typed 2 stage water jacket device | |
| JPS5833249Y2 (en) | Internal combustion engine cooling structure | |
| JP2017180304A (en) | Head gasket and cylinder head | |
| JPH09242602A (en) | Cylinder head | |
| JPH05312037A (en) | Cylinder block of internal combustion engine | |
| KR102216237B1 (en) | Internal combustion engine body | |
| JP3607964B2 (en) | Cylinder head cooling structure | |
| JPH0330602Y2 (en) | ||
| JP2530868Y2 (en) | Multi-cylinder engine cylinder head | |
| JP3264208B2 (en) | Cylinder head cooling structure | |
| JP3076662B2 (en) | Engine cooling water circulation device |