JPS62197658A - Cylinder head cooling device for internal combustion engine - Google Patents

Cylinder head cooling device for internal combustion engine

Info

Publication number
JPS62197658A
JPS62197658A JP3969886A JP3969886A JPS62197658A JP S62197658 A JPS62197658 A JP S62197658A JP 3969886 A JP3969886 A JP 3969886A JP 3969886 A JP3969886 A JP 3969886A JP S62197658 A JPS62197658 A JP S62197658A
Authority
JP
Japan
Prior art keywords
cylinder
cooling air
passage
intake
cylinder head
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
Application number
JP3969886A
Other languages
Japanese (ja)
Inventor
Mitsunori Iwata
岩田 三憲
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.)
Yanmar Co Ltd
Original Assignee
Yanmar Diesel Engine Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yanmar Diesel Engine Co Ltd filed Critical Yanmar Diesel Engine Co Ltd
Priority to JP3969886A priority Critical patent/JPS62197658A/en
Publication of JPS62197658A publication Critical patent/JPS62197658A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00Cylinders; Cylinder heads 
    • F02F1/24Cylinder heads
    • F02F1/26Cylinder heads having cooling means
    • F02F1/28Cylinder heads having cooling means for air cooling
    • F02F1/30Finned cylinder heads
    • F02F1/34Finned cylinder heads with means for directing or distributing cooling medium 

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)

Abstract

PURPOSE:To cool the portion facing each cylinder impartially and effectively by providing a cooling air inlet on an intake port side and forming a cooling passage for pouring cooling air from said inlet to an exhaust port side through said portion in parallel. CONSTITUTION:A cooling air inlet 30 is formed on an intake port side 15 of a cylinder block 1, opens to the under side of a cylinder head 13 positioned below the intake inlet 15, and communicates with a cooling air passage 20 formed by a cooling air guide 16. And the cooling air inlet 30 is communicated with a first passage 31 between valves extending from the periphery of a fuel injection valve inserting hole 27 of a first cylinder 8 to the counter side through the space between an intake and exhaust valves, a passage 32 between cylinders passing through the space between an exhaust passage 28 of a first cylinder 8 and an intake passage 35 of a second cylinder 9 and going through the counter side, and a second passage 33 between valves going through the space between the intake and exhaust valves from the periphery of fuel injection valve inserting hole 27 of the second cylinder 9, respectively.

Description

【発明の詳細な説明】 産業上の利用分野 この発明は、内燃機関の冷却装置であって、特にシリン
ダヘッドの冷却構造に関するものである。
DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to a cooling device for an internal combustion engine, and more particularly to a cooling structure for a cylinder head.

従来の技術 シリンダをクランク軸方向に直列配置した空冷式多気筒
機関では、フライホイール側に設けた冷却ファンからの
冷却風を、該冷却ファン側の導入口よりシリンダヘッド
間へ導き、これによって、シリンダヘッドの各弁間部や
燃料噴射弁廻りを冷却するようにしている。
Conventional technology In an air-cooled multi-cylinder engine in which cylinders are arranged in series in the direction of the crankshaft, cooling air from a cooling fan provided on the flywheel side is guided between the cylinder heads through an inlet on the cooling fan side. The area between each valve in the cylinder head and around the fuel injection valve is cooled.

発明が解決しようとする問題点 しかしながら、上記従来の冷却構造においては、まず、
フライホイール側の第1シリンダに対応する部分即ち第
1シリンダ側の弁間部や燃料噴射弁廻りを冷却した後、
その冷却風が第2シリンダ側へ供給されることとなり、
それゆえ、該第2シリンダ側の冷却が不充分となる欠点
がある。この発明は、かかる従来の欠点を解消して、各
シリンダを平等に冷却できるようにしたシリンダヘッド
の冷却構造を提供することを目的としている。
Problems to be Solved by the Invention However, in the above conventional cooling structure, first,
After cooling the part corresponding to the first cylinder on the flywheel side, that is, the part between the valves on the first cylinder side and around the fuel injection valve,
The cooling air will be supplied to the second cylinder side,
Therefore, there is a drawback that cooling on the second cylinder side is insufficient. SUMMARY OF THE INVENTION An object of the present invention is to provide a cylinder head cooling structure that eliminates such conventional drawbacks and allows each cylinder to be equally cooled.

問題点を解決するための手段 このような目的を達成するため、この発明では、直列配
置されたシリンダ(8)(9)中心間を結ぶ線を挾んで
その一方の側に吸気ポート(15)を、他方の側に排気
ボー) (36)  (37)を設けたシリンダヘッド
(13)において、前記吸気ポート(15)側に冷却風
導入口(30)を設け、この冷却風導入口(30)から
各シリンダ(8)(9)対応部を並列に通って上記排気
ボー) (36)  (37)側に向かって冷却風を流
す冷却経路(31)  (32)  (33)を形成し
たことを特徴とする。
Means for Solving the Problems In order to achieve this object, the present invention provides an intake port (15) on one side of the line connecting the centers of the cylinders (8) and (9) arranged in series. In the cylinder head (13) provided with an exhaust bow (36) (37) on the other side, a cooling air inlet (30) is provided on the intake port (15) side. ) A cooling path (31) (32) (33) is formed in which the cooling air flows from the exhaust bow (36) (37) side through the corresponding parts of each cylinder (8) (9) in parallel. It is characterized by

作用 吸気ポート(15)側の冷却風導入口(30)より入っ
た冷却風は、各シリンダ(8)(9)に対応する部分を
並列に流れて平等に冷却する。また、冷却風は、まず冷
却の必要な吸気ボー) (15)廻りを冷却し、最後に
排気ボー) (36)  (37)廻りを通って排出さ
れる。
The cooling air that enters from the cooling air inlet (30) on the working intake port (15) side flows in parallel to the portions corresponding to the cylinders (8) and (9) to cool them equally. In addition, the cooling air first cools the area around the intake bow (15) that requires cooling, and is finally discharged through the area around the exhaust bow (36) (37).

実施例 以下、この発明の構成を図示の実施例に基づいて説明す
ると、第2図及び第3図において、(1)はシリンダブ
ロック、(2)はクランクケースであり、この実施例で
は、これらシリンダブロック(1)とクランクケース(
2)とが一体に形成されている。クランクケース(2)
には、クランク軸(3)が軸支され、このクランク軸(
3)の一端に、フライホイール(4)と一体にして冷却
ファン(5)が形成されている。又、クランクケース(
2)の側面にはフランジ(6)が一体に形成され、この
フランジ(6)へ、上記フライホイール(4)及び冷却
ファン(5)を覆うファンケース(7)が取り付けられ
ている。シリンダブロック(1)には、上記クランク軸
(3)方向に直列して第1シリンダ(8)と第2シリン
ダ(9)が形成され、これらの各シリンダ(8)(9)
にシリンダヘッド(10)  (10)が挿入されてい
る。
Embodiment Below, the structure of the present invention will be explained based on the illustrated embodiment. In FIGS. 2 and 3, (1) is a cylinder block, and (2) is a crankcase. Cylinder block (1) and crankcase (
2) are integrally formed. Crank case (2)
The crankshaft (3) is supported by the crankshaft (3).
At one end of 3), a cooling fan (5) is formed integrally with the flywheel (4). Also, the crank case (
A flange (6) is integrally formed on the side surface of 2), and a fan case (7) that covers the flywheel (4) and cooling fan (5) is attached to this flange (6). A first cylinder (8) and a second cylinder (9) are formed in the cylinder block (1) in series in the direction of the crankshaft (3), and each of these cylinders (8) (9)
The cylinder head (10) (10) is inserted into the cylinder head (10).

(11)はピストン、(12)は連接棒を示している。(11) indicates a piston, and (12) indicates a connecting rod.

シリンダブロック(1)の外側面には、冷却用ひれ(1
4)が一体に形成しである。  (13)は、シリンダ
ブロック(1)の上面に据え付けられるシリンダヘッド
である。(15)は、このシリンダヘッド(13)の前
記クランク軸(3)と平行方向の一方の側面に開口した
吸気ポートであり、第3図に示すように、この吸気ポー
ト (15)側のシリンダヘッド(13)側壁部がシリ
ンダブロック(1)側面よりひさし状に突出している。
Cooling fins (1) are provided on the outer surface of the cylinder block (1).
4) is integrally formed. (13) is a cylinder head installed on the top surface of the cylinder block (1). (15) is an intake port opened on one side of the cylinder head (13) in a direction parallel to the crankshaft (3), and as shown in FIG. A side wall portion of the head (13) protrudes like a canopy from the side surface of the cylinder block (1).

(16)は、平面から見てL字形に折曲された冷却風ガ
イドであって、この冷却風ガイド(16)は、その一端
が、第4図の如く上記ファンケース(7)を取り付ける
ためのフランジ(6)まで延長され、その他端は、シリ
ンダブロック(1)の側面に沿って反フライホイール側
に伸びた後、シリンダブロック(1)の該反フライホイ
ール側側面を覆うよう略直角に折曲されている。また、
第4図で示すように、この冷却風ガイド(16)の下端
は、防振ゴム(17)を介し、シリンダブロック(1)
側面の突出部ヘボルl−(18)によって固着され、同
じく上端は、シリンダヘッド(1)の前記吸気ポート(
16)側突山部へ、同様に防振ゴム(19)を介して固
定されている。また、第1図で示すように、前記フラン
ジ(6)には、ファンケース(7)の出口と、この冷却
風ガイド(16)とシリンダブロック(1)側面間の冷
却風通路(20)とを連絡する開口部(21)が形成さ
れ、これによって、ファンケース(7)からの冷却風が
、該開口部(21)を通って冷却風ガイド(16)内に
入るようになっている。
(16) is a cooling air guide bent into an L-shape when viewed from above, and one end of this cooling air guide (16) is used to attach the fan case (7) as shown in Fig. 4. flange (6), and the other end extends along the side surface of the cylinder block (1) toward the anti-flywheel side, and then extends at a substantially right angle to cover the side surface of the cylinder block (1) on the anti-flywheel side. It is bent. Also,
As shown in Fig. 4, the lower end of this cooling air guide (16) is connected to the cylinder block (1) via a vibration isolating rubber (17).
It is fixed by a protrusion on the side (18), and the upper end also connects to the intake port (1) of the cylinder head (1).
16) It is similarly fixed to the side protruding portion via vibration isolating rubber (19). Further, as shown in FIG. 1, the flange (6) has an outlet of the fan case (7) and a cooling air passage (20) between the cooling air guide (16) and the side surface of the cylinder block (1). An opening (21) is formed in communication with the cooling air guide (16) so that the cooling air from the fan case (7) passes through the opening (21) and enters the cooling air guide (16).

シリンダヘッド(13)には、各シリンダ(8)(9)
に対応する部分において、各々吸・排気弁(22)  
(23)が、クランク軸(3)方向に並べて設けられる
。また、この吸・排気弁(22)  (23)間の中間
部分に、燃料噴射弁(24)が装着されている。第1図
に示す(25)  (26)は、上記吸・排気弁(22
)  (23)の挿入穴、(27)は同じく燃料噴射弁
挿入穴を示している。吸気ポー) (15)は、第1図
で示すように、シリンダヘッド(13)内部で第1吸気
通路(34)と第2吸気通路(35)の2方向に分かれ
、それぞれ各シリンダ(8)(9)側へ吸気を供給する
ようにしている。各排気通路(28)  (29)は、
おのおの、各シリンダ(8)(9)から、シリンダ中心
を結ぶ線Pを挟んで前記吸気ポート(15)の開口部と
反対側の側面に向けて形成されて、そのシリンダヘッド
(13)側面にボー) (36)  (37)が形成さ
れている。
Each cylinder (8) (9) is attached to the cylinder head (13).
In the parts corresponding to the intake and exhaust valves (22), respectively
(23) are arranged side by side in the direction of the crankshaft (3). Further, a fuel injection valve (24) is installed in an intermediate portion between the intake and exhaust valves (22) and (23). (25) and (26) shown in Fig. 1 are the intake/exhaust valves (22).
) (23) shows the insertion hole, and (27) also shows the fuel injection valve insertion hole. As shown in FIG. 1, the intake port (15) is divided into two directions, a first intake passage (34) and a second intake passage (35), inside the cylinder head (13), and is connected to each cylinder (8). (9) Intake air is supplied to the side. Each exhaust passage (28) (29) is
They are formed from each cylinder (8) (9) toward the side opposite to the opening of the intake port (15) across the line P connecting the cylinder centers, and are formed on the side of the cylinder head (13). Bo) (36) (37) are formed.

冷却風導入口(30)は、前記の如くシリンダブロック
(1)の側面より突出する吸気ポート(15)側におい
て、第2図の如く、該吸気ポート(15)の下側である
シリンダヘッド(13)下面に開口して、前記冷却風ガ
イド(16)によって形成される冷却風通路(20)へ
連通している。この導入孔(30)は、シリンダヘッド
(13)の前記クランク軸方向(3)の略全長にわたっ
て吸気ポー1− (15)の下面を跨ぐように形成され
ている。そして、この導入口(30)は、第1シリンダ
(8)における燃料噴射弁挿入孔(27)廻りから各部
・排気弁(22)  (23)間を通って反対側に向け
て流れる第1弁間道路(31) 、第1シリンダ(8)
の排気通路(28)と第2シリンダ(9)の吸気通路(
35)との間を通って反対側に抜けるシリンダ間通路(
32)、及び、第2シリンダ(9)における燃料噴射弁
挿入孔(27) 11りから吸排気弁(22)  (2
3)間を抜ける第2弁間道路(33)とに連通し、これ
によって、各シリンダ(8)(9)に対応する弁間道路
(31)  (33)等を並列的に流れて、これらを平
等に冷却するようにしている。(34)は、第2弁間道
路(33)から分岐して、第2排気ポートを冷却し、シ
リンダヘッド(13)の反フライホイール側側面へ抜け
る分岐路である。
The cooling air inlet (30) is located on the side of the intake port (15) protruding from the side surface of the cylinder block (1) as described above, and as shown in FIG. 13) It opens at the lower surface and communicates with the cooling air passage (20) formed by the cooling air guide (16). The introduction hole (30) is formed so as to straddle the lower surface of the intake port 1-(15) over substantially the entire length of the cylinder head (13) in the crankshaft direction (3). This inlet port (30) is connected to the first valve where the flow flows from around the fuel injection valve insertion hole (27) in the first cylinder (8) to the opposite side through various parts and between the exhaust valves (22) and (23). Intermediate road (31), 1st cylinder (8)
The exhaust passage (28) of the second cylinder (9) and the intake passage (
35) and the inter-cylinder passage (
32), and the intake and exhaust valve (22) (2) from the fuel injection valve insertion hole (27) 11 in the second cylinder (9).
3) It communicates with the second valve road (33) that passes through the gap, so that it flows in parallel through the valve roads (31), (33), etc. corresponding to each cylinder (8), (9), and so on. are cooled evenly. (34) is a branch road that branches off from the second valve road (33), cools the second exhaust port, and exits to the side surface of the cylinder head (13) on the side opposite to the flywheel.

発明の効果 この発明によれば、クランク枦(3)と平行方向の側面
側に冷却風導入口(3o)を形成し、この冷却風導入口
(30)から入った冷却風を各シリンダ(8)(9)対
応部を並列に流れてその反対側へ流すようにしているか
ら、クランク軸(3)方向に直列に配置された各シリン
ダ(8)(9)対応部分が平等に効率よく冷却される。
Effects of the Invention According to the present invention, the cooling air inlet (3o) is formed on the side surface parallel to the crankshaft (3), and the cooling air entering from the cooling air inlet (30) is directed to each cylinder (8). ) (9) Since the flow is made to flow through the corresponding parts in parallel and to the opposite side, the corresponding parts of each cylinder (8) and (9) arranged in series in the direction of the crankshaft (3) are equally and efficiently cooled. be done.

又、上記冷却風導入口(30)は、吸気ポー) (15
)側に形成されており、それゆえ、まずこの吸気ポート
(15)廻りを新鮮な空気で冷却することとなり、シリ
ンダ(8)(9)へ供給される吸気充填効率を向上でき
るとともに、排気ポート(36)  (37)側は冷却
風通路の最も下流に位置することとなって、該排気ポー
1− (36)  (37)側によって加熱された冷却
風が各部に供給されるという不都合がない。
In addition, the cooling air inlet (30) is an intake port (15).
) side, therefore, the area around this intake port (15) is first cooled with fresh air, improving the filling efficiency of the intake air supplied to the cylinders (8) and (9), and the exhaust port The (36) and (37) sides are located at the most downstream side of the cooling air passage, so there is no inconvenience that the cooling air heated by the exhaust port 1- (36) and (37) side is supplied to each part. .

【図面の簡単な説明】[Brief explanation of drawings]

第1図はシリンダへ、ドの横断平面図、第2図は、この
発明の実施例において、クランク軸と直角方向の面で切
断したエンジン全体の縦断面図、第3図は、同じくクラ
ンク軸方向で切断した縦断面図、第4図は、シリンダヘ
ッドを取り外して示すエンジンの概略斜視図である。 (8)・・・第1シリンダ、(9)・・・第2シリンダ
、(13)・・・シリンダヘッド、(15)・・・吸気
ポート、(30)・−・冷却風通路、(36)  (3
7)・・・排気ポート、(31)  (33)・・・弁
間部通路、(32)・・・シリンダ間通路。
Fig. 1 is a cross-sectional plan view of the cylinder, Fig. 2 is a longitudinal cross-sectional view of the entire engine cut along a plane perpendicular to the crankshaft in an embodiment of the present invention, and Fig. 3 is a longitudinal sectional view of the entire engine taken along the plane perpendicular to the crankshaft. FIG. 4 is a schematic perspective view of the engine with the cylinder head removed. (8)...First cylinder, (9)...Second cylinder, (13)...Cylinder head, (15)...Intake port, (30)...Cooling air passage, (36)... ) (3
7)...exhaust port, (31) (33)...passage between valves, (32)...passage between cylinders.

Claims (1)

【特許請求の範囲】[Claims] 直列配置されたシリンダ(8)(9)中心間を結ぶ線を
挟んでその一方の側に吸気ポート(15)を、他方の側
に排気ポート(36)(37)を設けたシリンダヘッド
(13)において、前記吸気ポート(15)側に冷却風
導入口(30)を設け、この冷却風導入口(30)から
各シリンダ(8)(9)対応部を並列に通って上記排気
ポート(36)(37)側に向かって冷却風を流す冷却
経路(31)(32)(33)(34)を形成したこと
を特徴とする内燃機関のシリンダヘッド冷却装置。
A cylinder head (13) is provided with an intake port (15) on one side and an exhaust port (36) (37) on the other side across a line connecting the centers of cylinders (8) and (9) arranged in series. ), a cooling air introduction port (30) is provided on the intake port (15) side, and the cooling air introduction port (30) passes through the corresponding parts of each cylinder (8) and (9) in parallel to the exhaust port (36). ) A cylinder head cooling device for an internal combustion engine, characterized in that cooling paths (31), (32), (33), and (34) are formed to flow cooling air toward the (37) side.
JP3969886A 1986-02-24 1986-02-24 Cylinder head cooling device for internal combustion engine Pending JPS62197658A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3969886A JPS62197658A (en) 1986-02-24 1986-02-24 Cylinder head cooling device for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3969886A JPS62197658A (en) 1986-02-24 1986-02-24 Cylinder head cooling device for internal combustion engine

Publications (1)

Publication Number Publication Date
JPS62197658A true JPS62197658A (en) 1987-09-01

Family

ID=12560238

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3969886A Pending JPS62197658A (en) 1986-02-24 1986-02-24 Cylinder head cooling device for internal combustion engine

Country Status (1)

Country Link
JP (1) JPS62197658A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0281919A (en) * 1988-09-16 1990-03-22 Kubota Ltd Head cooling system for multicylinder air-cooled engine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59206652A (en) * 1983-04-22 1984-11-22 ケ−エツチデ−・キヤナダ・インク・ドイツ・ア−ル・アンド・デ−・デイヴイジヨン Air-cooled reciprocating piston internal combustion engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59206652A (en) * 1983-04-22 1984-11-22 ケ−エツチデ−・キヤナダ・インク・ドイツ・ア−ル・アンド・デ−・デイヴイジヨン Air-cooled reciprocating piston internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0281919A (en) * 1988-09-16 1990-03-22 Kubota Ltd Head cooling system for multicylinder air-cooled engine

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