JPH0742613A - Cylinder head of internal combustion engine - Google Patents
Cylinder head of internal combustion engineInfo
- Publication number
- JPH0742613A JPH0742613A JP19241793A JP19241793A JPH0742613A JP H0742613 A JPH0742613 A JP H0742613A JP 19241793 A JP19241793 A JP 19241793A JP 19241793 A JP19241793 A JP 19241793A JP H0742613 A JPH0742613 A JP H0742613A
- Authority
- JP
- Japan
- Prior art keywords
- passage
- oil
- cooling water
- exhaust port
- cooling
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B2075/1804—Number of cylinders
- F02B2075/1816—Number of cylinders four
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F2001/244—Arrangement of valve stems in cylinder heads
- F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、内燃機関のシリンダ
ヘッドに関し、詳しくはその冷却水通路構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder head of an internal combustion engine, and more particularly to a cooling water passage structure thereof.
【０００２】[0002]
【従来の技術】内燃機関のシリンダヘッドには、図４〜
図６のように各気筒毎に燃焼室２、吸気ポート３、排気
ポート４、点火プラグの挿着筒５等が形成されると共
に、このシリンダヘッド１の燃焼室２側のロアデッキ６
と動弁機構側のアッパデッキ７間に冷却水が通る冷却水
通路８が形成されている。2. Description of the Prior Art A cylinder head of an internal combustion engine is shown in FIG.
As shown in FIG. 6, a combustion chamber 2, an intake port 3, an exhaust port 4, a spark plug insertion cylinder 5 and the like are formed for each cylinder, and a lower deck 6 on the combustion chamber 2 side of the cylinder head 1 is formed.
A cooling water passage 8 through which cooling water passes is formed between the upper deck 7 on the valve mechanism side.
【０００３】この冷却水通路８には、ウォータポンプか
らの冷却水が機関前端側の入口部９より流入され、気筒
列方向に流れて各部を冷却しながら、機関後端側の出口
部１０より排出される。Cooling water from a water pump flows into the cooling water passage 8 from an inlet portion 9 on the front end side of the engine, flows in the cylinder row direction to cool each portion, and from an outlet portion 10 on the rear end side of the engine. Is discharged.
【０００４】１１はシリンダヘッド１をシリンダブロッ
クに固定するためのヘッドボルト穴、１２は動弁機構を
潤滑しアッパデッキ６に落ちたオイルをシリンダブロッ
ク側に落とすオイル落流路である（実開昭６１ー７４６
４８号公報等参照）。Reference numeral 11 is a head bolt hole for fixing the cylinder head 1 to the cylinder block, and reference numeral 12 is an oil drop passage for lubricating the valve operating mechanism and dropping the oil dropped on the upper deck 6 to the cylinder block side. 61-746
48).
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、このよ
うな従来のシリンダヘッドは、冷却水通路７の各部にあ
って、冷却水は断面積が大きい部位ほど多く流れる一
方、断面積が小さく通路７の中央から離れた排気ポート
４下部、吸気ポート３下部に十分な冷却水流量を確保し
にくい。このため、燃焼室１壁が均一に冷却されないこ
とがある。However, in such a conventional cylinder head, in each portion of the cooling water passage 7, the cooling water flows more in a portion having a larger cross-sectional area, while the cooling water has a smaller cross-sectional area. It is difficult to secure a sufficient flow rate of the cooling water in the lower part of the exhaust port 4 and the lower part of the intake port 3 apart from the center. Therefore, the wall of the combustion chamber 1 may not be cooled uniformly.
【０００６】一方、冷却水通路７を形成するアッパデッ
キ６上には動弁機構を潤滑したオイルが落ちて流れる
が、このオイルの十分な冷却を行わせるように、通路７
のアッパデッキ側に冷却水を多く流すようにしたので
は、効率も悪く、またその分ポート側の冷却が不利にな
ってしまう。On the other hand, on the upper deck 6 forming the cooling water passage 7, the oil lubricating the valve operating mechanism flows down and flows, but the passage 7 is provided so as to sufficiently cool this oil.
If a large amount of cooling water is made to flow to the upper deck side, the efficiency will be poor and the cooling of the port side will be disadvantageous.
【０００７】この発明は、このような問題点を解決する
ことを目的としている。The present invention aims to solve such problems.
【０００８】[0008]
【課題を解決するための手段】この発明は、シリンダ列
方向に冷却水を通す冷却水通路を形成すると共に、動弁
機構を潤滑したオイルをシリンダブロック側に落とすオ
イル落流路を設けた内燃機関のシリンダヘッドにおい
て、前記冷却水通路を排気ポートの下部側もしくは吸気
ポートの下部側を通る下部通路とそれ以外の主通路とに
隔成すると共に、下部通路が前記オイル落流路の周囲を
通るように形成する。SUMMARY OF THE INVENTION According to the present invention, an internal combustion engine is provided in which a cooling water passage for passing cooling water is formed in a cylinder row direction, and an oil dropping passage for dropping oil lubricating a valve operating mechanism to a cylinder block side is provided. In a cylinder head of an engine, the cooling water passage is divided into a lower passage that passes through a lower side of an exhaust port or a lower side of an intake port and a main passage other than that, and the lower passage surrounds the oil drop passage. Form to pass.
【０００９】[0009]
【作用】したがって、排気ポートもしくは吸気ポートの
下部側が独立した通路となるため、それ以外の通路の冷
却水の流れによらず、十分な冷却水流量を確保でき、ま
た独立した下部通路としたため、それ以外の通路にあっ
て冷却水の流れがスムーズになり、通路内のポートの下
部側に必要量の冷却水を流すことができる。Therefore, since the lower side of the exhaust port or the intake port becomes an independent passage, a sufficient cooling water flow rate can be secured regardless of the flow of cooling water in the other passages, and an independent lower passage is provided. In the other passages, the flow of cooling water becomes smooth, and a required amount of cooling water can be made to flow to the lower side of the port in the passage.
【００１０】一方、この独立した下部通路がオイル落流
路の周囲を通るので、下部通路を流れる冷却水によって
動弁機構を潤滑したオイルを効率良く冷却できる。On the other hand, since the independent lower passage runs around the oil drop passage, the oil that lubricates the valve mechanism can be efficiently cooled by the cooling water flowing through the lower passage.
【００１１】[0011]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１２】図１〜図３は４バルブ４気筒エンジンのシ
リンダヘッド２０の各断面図で、２１は燃焼室、２２は
吸気ポート、２３は排気ポート、２４は点火プラグの挿
着筒である。1 to 3 are sectional views of a cylinder head 20 of a four-valve four-cylinder engine, in which 21 is a combustion chamber, 22 is an intake port, 23 is an exhaust port, and 24 is a spark plug insertion cylinder.
【００１３】シリンダヘッド２０内には、燃焼室２１側
のロアデッキ２５と動弁機構（図示しない）側のアッパ
デッキ２６間に形成される冷却水通路を、排気ポート２
３の下部側を通る下部通路２７と、それ以外の主通路２
８とに分割する隔壁２９が形成される。In the cylinder head 20, a cooling water passage formed between a lower deck 25 on the combustion chamber 21 side and an upper deck 26 on the valve operating mechanism (not shown) side is provided with an exhaust port 2
Lower passage 27 passing through the lower side of 3 and the other main passage 2
A partition 29 that divides into 8 and 8 is formed.
【００１４】この隔壁２９は、各気筒間の隣合う排気ポ
ート２３間に設けられる。この場合、その排気ポート２
３間には所定の位置に、シリンダヘッド２０をシリンダ
ブロック（図示しない）に固定するためのヘッドボルト
穴３０およびアッパデッキ２６上のオイルをシリンダブ
ロック側に落とすオイル落流路３１の柱状部３２が形成
され、隔壁２９はロアデッキ２５から排気ポート２３の
壁に沿って柱状部３２につながるように形成される。The partition wall 29 is provided between the adjacent exhaust ports 23 between the cylinders. In this case, the exhaust port 2
Between the three, at a predetermined position, a head bolt hole 30 for fixing the cylinder head 20 to a cylinder block (not shown) and a columnar portion 32 of an oil drop passage 31 for dropping the oil on the upper deck 26 to the cylinder block side. The partition wall 29 is formed so as to be connected to the columnar portion 32 from the lower deck 25 along the wall of the exhaust port 23.
【００１５】柱状部３２の下部が隔壁２９によって囲わ
れると共に、その柱状部３２の下部のオイル落流路３１
の周囲に環状の通路部３３が形成される。The lower portion of the columnar portion 32 is surrounded by the partition wall 29, and the oil falling channel 31 below the columnar portion 32 is formed.
An annular passage portion 33 is formed around the.
【００１６】シリンダヘッド２０のエンジン前端側に
は、下部通路２７の入口部３４と，主通路２８の入口部
３５とが形成され、エンジンの後端側には、下部通路２
７と主通路２８との合流出口部３６が形成される。An inlet portion 34 of the lower passage 27 and an inlet portion 35 of the main passage 28 are formed at the engine front end side of the cylinder head 20, and the lower passage 2 is provided at the rear end side of the engine.
A merging outlet portion 36 between the 7 and the main passage 28 is formed.
【００１７】入口部３４，３５より、ウォータポンプ
（図示しない）からの冷却水が流入される。Cooling water from a water pump (not shown) flows in through the inlets 34 and 35.
【００１８】なお、動弁機構を潤滑したオイルは、アッ
パデッキ２６上に落ちてオイル落流路３１に流入し、オ
イル落流路３１からシリンダブロック内を通ってオイル
パン側に回収される。The oil that lubricates the valve mechanism falls on the upper deck 26 and flows into the oil drop passage 31, and is collected from the oil drop passage 31 to the oil pan side through the inside of the cylinder block.
【００１９】このような構成のため、ウォータポンプか
ら送られた冷却水は、入口部３４，３５よりそれぞれ下
部通路２７、主通路２８を独立に流れるので、下部通路
２７に要求量の冷却水を流すことが可能である。With this structure, the cooling water sent from the water pump flows independently through the inlets 34 and 35 through the lower passage 27 and the main passage 28, so that the required amount of cooling water is supplied to the lower passage 27. It is possible to flush.
【００２０】この場合、入口部３４，３５の口径を変え
ることで、下部通路２７の冷却水量の増やすことができ
る。In this case, the amount of cooling water in the lower passage 27 can be increased by changing the diameters of the inlet portions 34 and 35.
【００２１】また、下部通路２７では入口部３４から流
入した冷却水は、排気ポート２３の下部側を通った後、
隔壁２９に沿う通路部３７およびオイル落流路３１の周
囲に形成した通路部３３を流れ、その流れを繰り返して
排出される。In the lower passage 27, the cooling water flowing from the inlet 34 passes through the lower side of the exhaust port 23,
It flows through the passage portion 37 along the partition wall 29 and the passage portion 33 formed around the oil drop passage 31, and the flow is repeatedly discharged.
【００２２】このため、排気ポート２３および下部のロ
アデッキ２５側を十分に冷却できると共に、オイル落流
路３１の周囲を流れる冷却水によって、動弁機構を潤滑
したオイルを効率的に冷却することができる。Therefore, the exhaust port 23 and the lower lower deck 25 side can be sufficiently cooled, and the oil that lubricates the valve operating mechanism can be efficiently cooled by the cooling water flowing around the oil drop passage 31. it can.
【００２３】また、下部通路２７を隔成したため、主通
路２８の冷却水の流れが従来と比べてスムーズになり、
その分吸気ポート２２側にも冷却水が流れやすくなる。Further, since the lower passage 27 is separated, the flow of the cooling water in the main passage 28 becomes smoother than in the conventional case,
As a result, the cooling water easily flows to the intake port 22 side.
【００２４】したがって、オイルを的確に冷却できると
共に、燃焼室２１壁を均一に冷却することができ、信頼
性が向上する。Therefore, the oil can be cooled accurately and the wall of the combustion chamber 21 can be cooled uniformly, and the reliability is improved.
【００２５】なお、下部通路２７は、オイル落流路３１
と共に吸気ポート２２側に設けても良い。The lower passage 27 has an oil drop passage 31.
It may be provided together with the intake port 22 side.
【００２６】[0026]
【発明の効果】以上のようにこの発明は、シリンダ列方
向に冷却水を通す冷却水通路を形成すると共に、動弁機
構を潤滑したオイルをシリンダブロック側に落とすオイ
ル落流路を設けた内燃機関のシリンダヘッドにおいて、
前記冷却水通路を排気ポートの下部側もしくは吸気ポー
トの下部側を通る下部通路とそれ以外の主通路とに隔成
すると共に、下部通路が前記オイル落流路の周囲を通る
ように形成したので、ポート下部側に要求の冷却水流量
を確保して燃焼室を均一に冷却できると共に、オイルを
効率的に冷却できる。As described above, according to the present invention, a cooling water passage for passing cooling water in the cylinder row direction is formed, and an internal oil flow passage for dropping the oil lubricating the valve operating mechanism to the cylinder block side is provided. In the cylinder head of the engine,
Since the cooling water passage is divided into a lower passage passing through the lower side of the exhaust port or the lower side of the intake port and the other main passages, the lower passage is formed so as to pass around the oil drop passage. In addition, the required cooling water flow rate can be secured on the lower side of the port to uniformly cool the combustion chamber and efficiently cool the oil.
【図１】実施例のシリンダヘッドを示す図２のＡ−Ａ線
に沿う断面図である。FIG. 1 is a cross-sectional view taken along line AA of FIG. 2 showing a cylinder head of an embodiment.
【図２】図１のＢ−Ｂ線に沿う部分断面図である。FIG. 2 is a partial cross-sectional view taken along the line BB of FIG.
【図３】図１のＣ−Ｃ線に沿う部分断面図である。FIG. 3 is a partial cross-sectional view taken along the line CC of FIG.
【図４】従来例の断面図である。FIG. 4 is a sectional view of a conventional example.
【図５】図４のＤ−Ｄ線に沿う部分断面図である。5 is a partial cross-sectional view taken along the line DD of FIG.
【図６】図４のＥ−Ｅ線に沿う部分断面図である。6 is a partial cross-sectional view taken along the line EE of FIG.
２０ シリンダヘッド ２１ 燃焼室 ２２ 吸気ポート ２３ 排気ポート ２４ 挿着筒 ２５ ロアデッキ ２６ アッパデッキ ２７ 下部通路 ２８ 主通路 ２９ 隔壁 ３１ オイル落流路 ３３ 通路部 ３４，３５ 入口部 ３７ 通路部 20 Cylinder Head 21 Combustion Chamber 22 Intake Port 23 Exhaust Port 24 Insertion Cylinder 25 Lower Deck 26 Upper Deck 27 Lower Passage 28 Main Passage 29 Partition Wall 31 Oil Drop Passage 33 Passage 34, 35 Inlet 37 Passage
Claims (1)
路を形成すると共に、動弁機構を潤滑したオイルをシリ
ンダブロック側に落とすオイル落流路を設けた内燃機関
のシリンダヘッドにおいて、前記冷却水通路を排気ポー
トの下部側もしくは吸気ポートの下部側を通る下部通路
とそれ以外の主通路とに隔成すると共に、下部通路が前
記オイル落流路の周囲を通るように形成したことを特徴
とする内燃機関のシリンダヘッド。1. A cylinder head for an internal combustion engine, comprising: a cooling water passage for passing cooling water in a cylinder row direction; and an oil drop passage for dropping oil that lubricates a valve operating mechanism to a cylinder block side. The water passage is divided into a lower passage that passes through the lower side of the exhaust port or the lower side of the intake port and the other main passage, and the lower passage is formed so as to pass around the oil drop passage. Cylinder head of internal combustion engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19241793A JPH0742613A (en) | 1993-08-03 | 1993-08-03 | Cylinder head of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19241793A JPH0742613A (en) | 1993-08-03 | 1993-08-03 | Cylinder head of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0742613A true JPH0742613A (en) | 1995-02-10 |
Family
ID=16290978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19241793A Pending JPH0742613A (en) | 1993-08-03 | 1993-08-03 | Cylinder head of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0742613A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010203412A (en) * | 2009-03-05 | 2010-09-16 | Toyota Motor Corp | Exhaust cooling structure of internal combustion engine and control device of exhaust cooling structure of internal combustion engine |
| JP2015113706A (en) * | 2013-12-09 | 2015-06-22 | マツダ株式会社 | Cooling structure of engine |
| CN109915274A (en) * | 2019-03-05 | 2019-06-21 | 广西玉柴机器股份有限公司 | A kind of braided channel cylinder head of anti-carbonization of oil |
-
1993
- 1993-08-03 JP JP19241793A patent/JPH0742613A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010203412A (en) * | 2009-03-05 | 2010-09-16 | Toyota Motor Corp | Exhaust cooling structure of internal combustion engine and control device of exhaust cooling structure of internal combustion engine |
| JP2015113706A (en) * | 2013-12-09 | 2015-06-22 | マツダ株式会社 | Cooling structure of engine |
| CN109915274A (en) * | 2019-03-05 | 2019-06-21 | 广西玉柴机器股份有限公司 | A kind of braided channel cylinder head of anti-carbonization of oil |
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