JPS61135960A - Cylinder head for air-cooled type internal combustion engine - Google Patents

Cylinder head for air-cooled type internal combustion engine

Info

Publication number
JPS61135960A
JPS61135960A JP25663984A JP25663984A JPS61135960A JP S61135960 A JPS61135960 A JP S61135960A JP 25663984 A JP25663984 A JP 25663984A JP 25663984 A JP25663984 A JP 25663984A JP S61135960 A JPS61135960 A JP S61135960A
Authority
JP
Japan
Prior art keywords
cylinder head
cooling
outlet
cooling air
cooling fan
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
JP25663984A
Other languages
Japanese (ja)
Other versions
JPH0148387B2 (en
Inventor
Jun Sasaki
佐々木 准
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 JP25663984A priority Critical patent/JPS61135960A/en
Publication of JPS61135960A publication Critical patent/JPS61135960A/en
Publication of JPH0148387B2 publication Critical patent/JPH0148387B2/ja
Granted legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P1/00Air cooling
    • F01P1/02Arrangements for cooling cylinders or cylinder heads, e.g. ducting cooling-air from its pressure source to cylinders or along cylinders
    • 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 

Abstract

PURPOSE:To lower the manufacturing cost of a cylinder head which is used as a forced draft type cooling system and also as an induced draft type cooling system, by employing such an arrangement that the type of cooling system can be changed by opening and closing inlet ports formed in the cylinder head. CONSTITUTION:Inlet ports 19, 20, 23 are opened in a cylinder head 3 at the positions thereby located on the opposite side of a cooling fan that is disposed by the side of the cylinder head 3, and cooling-air passages 22, 25 are formed to extend from said inlet ports 19, 20, 23 to outlet ports 21, 24 located on the side of the cooling fan. In case of using the cylinder head 3 as an induced draft type cooling system, cooling air drawn from the inlet ports 19, 20, 23 through operation of the cooling fan 10 is passed through the cooling-air passages 22, 25 are discharged to the outside from outlet ports 21, 24. In case of using the cylinder head as a forced draft type cooling system, on the other hand, inlet ports 19, 20 are closed by cap plates 27, 28 so that cooling air is concentrated toward the portion between valves in the cylinder head 3 and cooling air drawn by the cooling fan is carried in the direction of arrows shown by the solid line in the drawing.

Description

【発明の詳細な説明】 産業上の利用分野 この発明は、空冷式内燃機関のシリンダヘッドに関する
ものである。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a cylinder head for an air-cooled internal combustion engine.

従来の技術 従来、空冷式内燃機関の冷却方式としては、冷却ファン
と反対側より冷却風を吸込んで、該冷却ファン側へ向け
て冷却風を流す吸込み型の冷却方式と、逆に冷却ファン
側よりその反対側へ冷却風を流す押込み型冷却方式とが
ある。例えば、防音ケース等によって囲まれていない標
準型の内燃機関では押込め型の冷却方式が、他方、防音
ケースによって囲まれた防音型内燃機関においては、吸
込み型の冷却方式が用いられている。
Conventional technology Conventionally, the cooling methods for air-cooled internal combustion engines include a suction type cooling method, which sucks in cooling air from the side opposite to the cooling fan and directs the cooling air toward the cooling fan, and a suction type cooling method, which draws cooling air from the side opposite to the cooling fan and directs the cooling air toward the cooling fan. There is also a push-in type cooling system in which the cooling air is directed to the opposite side. For example, a standard internal combustion engine that is not surrounded by a soundproof case or the like uses a push-in type cooling system, while a soundproof internal combustion engine that is surrounded by a soundproof case uses a suction type cooling system.

また、シリンダヘッドには、該シリンダヘッド内を通る
冷却風通路が形成されて、冷却ファンによる冷却風をこ
の冷却風通路を通って流すようにしているが、この場合
、押込め型冷却方式と吸込み型冷却方式とでは、該冷却
風通路の形状も異なったものとしなければならない。即
ち、一般に押込め型方式の場合には、冷却ファンによっ
てエネルギーを与えられた動圧のため冷却風の直進性が
強(、そのため、最も熱負荷の大きい弁開部側へ冷却風
を導くよう、この弁開部へ向けて通路を形成する必要が
ある。他方、吸込み型冷却方式においては、冷却風自体
はエネルギーを与えられていないため、吸込み側即ち入
口部分の面積を出来るだけ多くして、冷却風量を多くす
る必要がある。
In addition, a cooling air passage is formed in the cylinder head, and the cooling air from the cooling fan is made to flow through this cooling air passage, but in this case, a push-in type cooling method is used. In the suction type cooling system, the shape of the cooling air passage must also be different. In other words, in the case of a push-in type system, the cooling air is generally directed in a straight line due to the dynamic pressure given energy by the cooling fan. , it is necessary to form a passage toward this valve opening.On the other hand, in the suction type cooling system, the cooling air itself is not given energy, so the area of the suction side, that is, the inlet part, should be made as large as possible. , it is necessary to increase the amount of cooling air.

従来においては、このような要求に応えるため、押込め
型冷却方式と吸込み型冷却方式の双方に合わ・口でシリ
ンダヘッドを製作し、夫々別のシリンダヘッドを用いる
こととしてこれに対処していた。
In the past, in order to meet these demands, cylinder heads were made to fit both the forced cooling system and the suction cooling system, and separate cylinder heads were used for each. .

発明が解決しようとする問題点 しかしながら、−1−記従来の構造においては、押込み
方式と吸込み方式の双方に合わせて2種類のシリンダヘ
ッドが必要となり、コスト高となる欠点を有している。
Problems to be Solved by the Invention However, in the conventional structure described in -1-, two types of cylinder heads are required for both the push-in type and the suction type, which has the disadvantage of increasing costs.

そこで、この発明は、かかる欠点を解消して、押込み方
式と吸込み方式の双方に同一のシリンダヘッドを兼用で
きるようにして、シリンダヘノl−の製作コストを低減
することを目的としている。
SUMMARY OF THE INVENTION An object of the present invention is to eliminate such drawbacks, to allow the same cylinder head to be used for both the push-in type and the suction type, and to reduce the manufacturing cost of the cylinder head.

問題点を解決するだめの手段 ごのような目的を達成するため、この発明では、第1図
及び第2図で示すように、シリンダヘッド(3)の側方
に冷却ファン(10)を配設し、同じくシリンダヘノF
’ +31の前記冷却ファン(10)と反zj側に開口
した入口(19>  (20)  (23)から、該冷
却ファン(10)側出口に至る冷却風通路(22)  
(25)を形成し、」二記入口(19)  (20) 
 (23)から出口(2+)  (21)を通って冷却
ファン(10)側へ冷却風を流す吸込み型冷却方式に対
し、冷却ファン(10)から上記出口(21)  (2
4)を通って入口(19)  (20)  (23)側
へ冷却風を流す押込み型冷却方式のとき、シリンダヘッ
ド(3)内の弁開部側へ冷却風を集中さすべく前記一部
の入口(19)  (20)を塞ぐことにより、同一の
シリンダヘッド(3)を吸込み型冷却方式と押込み型冷
却方式の双方へ兼用可能としたことを特徴としている。
In order to achieve the objective as a means to solve the problem, in this invention, as shown in FIGS. 1 and 2, a cooling fan (10) is disposed on the side of the cylinder head (3). and also cylinder heno F
' A cooling air passage (22) leading from the inlet (19> (20) (23) opened on the side opposite to the cooling fan (10) of +31 and the zz side to the outlet on the side of the cooling fan (10)
(25) and form two inlets (19) (20)
In contrast to the suction type cooling system in which cooling air flows from (23) through the outlet (2+) (21) to the cooling fan (10), from the cooling fan (10) to the outlet (21) (2
4) to the inlet (19), (20), and (23) side, in order to concentrate the cooling air to the valve opening side in the cylinder head (3), By blocking the inlets (19) and (20), the same cylinder head (3) can be used for both the suction type cooling system and the push type cooling system.

作   用 押込み方式の場合には、該押込み方式のときに出口側と
なる一部の入口(19)  (20)が塞がれ、そのた
め、冷却ファン(10)側より押し出された冷却風が弁
開部を通るよう向きを変更され、他方、吸込み型冷却方
式の場合には、上記入口(19)  (20)を開放し
、これによって、入口の開口全面積が増大され、大量の
冷却風を吸込むことができる。
In the case of the push-in method, some of the inlets (19) and (20) on the outlet side are blocked, so that the cooling air pushed out from the cooling fan (10) side flows through the valve. On the other hand, in the case of a suction type cooling system, the said inlets (19) (20) are opened, thereby increasing the total opening area of the inlet and allowing a large amount of cooling air to pass through. Can be inhaled.

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図は、吸込み型冷却方式を採用した場合のエ
ンジンの全体を示し、図において(1)はクランクケー
ス、(2)はシリンダボディ、(3)は、該シリンダボ
ディ(2)の上部に載置されたシリンダー・ノド、(4
)は、該シリンダヘッド(3)の上部に取付けられた弁
腕室ケースを示している。シリンダヘッド(3)の左右
方向の一方、即ち、左側の側面には、排気管(5)がそ
のフランジ(6)部において取付けられ、その反対側即
ち右側の側面には、吸気管(7)が取付けられている。
Embodiment Below, the structure of the present invention will be explained based on the illustrated embodiment. FIG. 2 shows the entire engine when a suction type cooling system is adopted. ) is the cylinder body, (3) is the cylinder throat placed on the upper part of the cylinder body (2), (4
) shows the valve arm chamber case attached to the upper part of the cylinder head (3). An exhaust pipe (5) is attached at its flange (6) to one side of the cylinder head (3) in the left and right direction, that is, the left side, and an intake pipe (7) is attached to the opposite side, that is, the right side. is installed.

(8)は、該吸気管(7)の管端へ取付けたエアクリー
ナである。また、この吸気管(7)と同じ側には、シリ
ンダヘッド側方下部に、クランク軸(9)の端部に冷却
ファン(10)が取付けられている。(11)は、この
冷却ファン(10)の羽根部分を覆うスクロールであり
、更に、このスクロール(II)とエンジン本体側との
間に跨ってファンケ−ス(12)が取付けられている。
(8) is an air cleaner attached to the end of the intake pipe (7). Further, on the same side as the intake pipe (7), a cooling fan (10) is attached to the end of the crankshaft (9) at the lower side of the cylinder head. Reference numeral (11) denotes a scroll that covers the blade portion of the cooling fan (10), and a fan case (12) is further installed spanning between the scroll (II) and the engine body side.

(13)は、前記冷却ファン(10)の反対側において
、エンジンへ連結した作業機としての発電機を示してい
る。
(13) indicates a generator as a working machine connected to the engine on the opposite side of the cooling fan (10).

この吸込み型冷却方式における冷却風は、上記冷却ファ
ン(10)と反対側におけるシリンダへ・ノド(3)の
左側側面より、該シリンダへ・ノド(3)内を通って吸
気管(7)に一体形成した冷却風ガイド(29)より、
冷却ファンケース(12)内へ入り、前記スクロール(
11)を通って外部へ排出される。
In this suction type cooling system, the cooling air is directed to the cylinder on the opposite side of the cooling fan (10), to the cylinder from the left side of the throat (3), to the intake pipe (7) through the inside of the throat (3). From the integrally formed cooling air guide (29),
Enter the cooling fan case (12) and press the scroll (
11) and is discharged to the outside.

第1図が〜上記シリンダヘッド(3)内の構造を示して
いる。(15)  (16)は、シリンダヘッド(3)
の中央部において左右に並設した排気弁挿入穴と吸気弁
挿入穴である。(17)は、前記排気弁挿入穴(15)
に連通し、かつ、その出口をシリンダヘッド(3)の左
側側面に開口した排気通路を示している。
FIG. 1 shows the structure inside the cylinder head (3). (15) (16) is the cylinder head (3)
An exhaust valve insertion hole and an intake valve insertion hole are arranged side by side on the left and right in the center of the cylinder. (17) is the exhaust valve insertion hole (15)
The figure shows an exhaust passage that communicates with the cylinder head (3) and has an outlet opening on the left side surface of the cylinder head (3).

他方、吸気弁挿入穴(16)に連通して吸気通路(18
)が形成され、この吸気通路(1B)の入口部がシリン
ダヘッド(3)の右側側面に開口している。
On the other hand, the intake passage (18) communicates with the intake valve insertion hole (16).
) is formed, and the inlet portion of this intake passage (1B) opens on the right side surface of the cylinder head (3).

排気通路(17)の後部側には、前後一対の入口(19
)  (20)がシリンダヘッド(3)の左側側面に開
1]形成され、この2+[l、lの入口(+9)  (
20)を合流させて、前記吸気通路(18)の後部側に
おいて、シリンダヘッド(3)の右側側面に開口する出
口(21)へ流れる1つの後部側冷却風通路(22)を
形成している。他方、排気通路(17)と吸気通路(1
8)の前部側には、シリンダヘッド(3)左側側面の入
口(23)より右側側面の出口(24) −・略直線状
に流れる前部側冷却風通路(25)が形成しである。
A pair of front and rear entrances (19) are provided on the rear side of the exhaust passage (17).
) (20) is formed on the left side surface of the cylinder head (3), and this 2+[l, l inlet (+9) (
20) to form one rear side cooling air passage (22) that flows to the outlet (21) that opens on the right side of the cylinder head (3) on the rear side of the intake passage (18). . On the other hand, the exhaust passage (17) and the intake passage (1
8) is formed with a front side cooling air passage (25) that flows approximately linearly from the inlet (23) on the left side of the cylinder head (3) to the outlet (24) on the right side. .

更に、これら後部側冷却風通路(22)と前部側冷却風
通路(25)とは、上記排気弁挿入穴(15)と吸気弁
挿入穴(16)間の弁開部通路(26)を介して共に連
通されている。
Furthermore, the rear side cooling air passage (22) and the front side cooling air passage (25) are connected to the valve opening passage (26) between the exhaust valve insertion hole (15) and the intake valve insertion hole (16). communicated together through.

なお、−に記冷却風通路(22)  (25)の入[コ
(19)  (22)  (23)及び出口(21) 
 (24)の名称は、吸込み型方式の場合を基準として
呼称したものであり、押込み型の場合は、出口(2])
  (24)が入口となり、1部の入口(23)が出口
となるが、この明細書では一応の識別のため上記の如く
呼称する。
In addition, the inlet (19) (22) (23) and outlet (21) of the cooling air passage (22) (25) shown in -
The name (24) is based on the suction type, and in the case of the push type, the name is the exit (2)
(24) serves as an inlet, and part of the inlet (23) serves as an outlet, but in this specification, they will be referred to as above for the purpose of identification.

さて、この第1図は、前記第2図の場合とは逆に、押込
み型冷却方式に用いる場合を示しており、前後の冷却風
通路(22)  (25)のうち、後部側冷却風通路(
22)の入口(19)  (20)は、その一方(20
)は、専用の蓋板(27)により、他方(19)は、排
気管(5)のフランジ(6)と一体形成した蓋板(28
)によって共に閉塞されている。図の実線矢印がこの場
合の冷却風の流れを示しており、冷却ファン(10)側
即ちシリンダヘッド(3)右側側面に形成した出口(2
1)  (24)より入った冷却風は、前部側冷却風通
路(25)においては、その出口(24)側より入口(
23)側に向けてそのまま略直線状に流れる。他方、後
部側冷却風通路(22)においては、その出【」である
入口(19)  (20)が塞がれているため、シリン
ダヘッド(3)側面の出口(21)より入った冷却風は
、この入口(19)  (20)よりは出ることができ
ず、そのため、前記弁開部通路(26)を通って、前部
側冷却風通路(23)側へ流れ、これによって弁開部を
集中的に冷却する。即ち、押込み型冷却方式の場合、冷
却風の直進性が強いため、前記蓋板(27)  (28
)を取付けない場合には、後部側出口(2I)より入っ
た冷却風がそのまま入口(19)(21)より流れでて
、弁開部の冷却を充分行ない得ないのであるが、このよ
うに各入口(19)  (20)を塞ぐことによって弁
開部へ冷却風を集中させるよう導き、冷却効果をあげる
ことができる。
Now, this Fig. 1 shows the case where the push-in type cooling system is used, contrary to the case of Fig. 2, and among the front and rear cooling air passages (22) (25), the rear side cooling air passage (
The entrances (19) and (20) of
) has a dedicated cover plate (27), and the other (19) has a cover plate (28) integrally formed with the flange (6) of the exhaust pipe (5).
) are both occluded by The solid arrows in the figure indicate the flow of cooling air in this case, and the outlet (2) formed on the cooling fan (10) side, that is, the right side of the cylinder head (3).
1) In the front side cooling air passage (25), the cooling air entering from (24) flows from the outlet (24) side to the inlet (25).
23) flows in a substantially straight line toward the side. On the other hand, in the rear cooling air passage (22), the inlets (19) and (20) are blocked, so the cooling air enters from the outlet (21) on the side of the cylinder head (3). cannot exit through the inlets (19) and (20), and therefore flows through the valve opening passage (26) to the front side cooling air passage (23), thereby opening the valve. is intensively cooled. That is, in the case of the push-in type cooling method, since the cooling air has a strong straight direction, the cover plate (27) (28
) is not installed, the cooling air that enters from the rear outlet (2I) will flow directly out from the inlets (19) and (21), and the valve opening will not be sufficiently cooled. By blocking each of the inlets (19) and (20), the cooling air can be directed to concentrate at the valve opening, thereby increasing the cooling effect.

他方、このシリンダヘッド(3)を吸込み型冷却方式に
用いる場合には、上記蓋4i (27)  <28)を
外し、入口(19)  (20)を開口させる。このよ
うにすることによって、入口(19)  (29)  
(23)の全開口面を増大さセて、大量の冷却風を吸込
み、吸込み方式に必要とされる充分な冷却風を流すこと
ができる。この場合の冷却風の流れを1点鎖線で示す。
On the other hand, when this cylinder head (3) is used in a suction type cooling system, the lid 4i (27) <28) is removed and the inlets (19) (20) are opened. By doing this, the entrance (19) (29)
By increasing the total opening area of (23), a large amount of cooling air can be sucked in and sufficient cooling air required for the suction method can be flowed. The flow of cooling air in this case is shown by a dashed line.

第3図以下は、上記出口(21)  (24)側に取付
ける冷却風ガイドの構造とその取付は構造を示している
Figures 3 and below show the structure of the cooling air guide installed on the outlet (21) and (24) sides, and the structure of its installation.

第3図は、吸込み型冷却方式の場合のガイド(29) 
 (29)を示しており、これらのガイド(29)(2
9)は、夫々吸気管(7)の前後両側に一体に形成され
ており、吸気管(7)の取付けに際し、両ガイド(29
)  (29)が、シリンダヘッド(3)の出口(21
)(24)全面を覆うようにして取付けられる。なお、
シリンダヘッド(3)側には、前部側出口(24)の前
部側口端部が切欠(31)されて、上記前部側ガイド(
29)をこの出口(24)へ合致させると、この部分に
隙間を生じるようにしている。これは、シリンダヘッド
(3)の前部側に冷却の必要な燃料タンク(図示せず)
が位置している場合において、この燃料タンク側へも冷
却風を流すためであり、したがって、そのような冷却の
必要な部品がない場合には、この部分をグロメット等に
よって塞いでおく。
Figure 3 shows the guide (29) for the suction type cooling system.
(29) and these guides (29) (2
9) are integrally formed on both the front and rear sides of the intake pipe (7), and when installing the intake pipe (7), both guides (29
) (29) is the outlet (21) of the cylinder head (3).
) (24) It can be installed so as to cover the entire surface. In addition,
On the cylinder head (3) side, the front end of the front side outlet (24) is cut out (31), and the front side guide (
29) to this outlet (24), a gap is created in this part. This is a fuel tank (not shown) that needs to be cooled on the front side of the cylinder head (3).
This is to allow cooling air to also flow to the fuel tank side when the fuel tank is located. Therefore, if there are no parts that require such cooling, this part should be covered with a grommet or the like.

第4図は、押込み型冷却方式の場合に用いられるガイド
(32)  (32)を示しており、前記と同様に、こ
の場合のガイド(32)  (32)も吸気管(7)の
前後両側に一体に形成されるが、前部側ガイド(32)
は吸込み型の場合の前部側ガイド(29)に比較してそ
の高さを低くしである。従って、この押込み型冷却方式
の場合のガイド(32)  (32)を吹付けた場合、
前部側出口(24)と前部側ガイド(32)との間には
、その上端部分に開口隙間(33)を生ずる。このよう
にした理由は次のとおりである。
Figure 4 shows the guides (32) (32) used in the case of the push-in type cooling system, and similarly to the above, the guides (32) (32) in this case are also used on both the front and rear sides of the intake pipe (7). The front side guide (32) is integrally formed with the front side guide (32).
Its height is lower than that of the front side guide (29) in the case of the suction type. Therefore, when the guides (32) (32) for this push type cooling method are sprayed,
An opening gap (33) is formed at the upper end portion between the front side outlet (24) and the front side guide (32). The reason for doing this is as follows.

即ち、第1図で示すように、押込み型冷却のとき、この
前部側出口(24)より入った冷却風は、そのまま略直
線状に流れて前部側入口(23)より外部へ排出される
。他方、後部側出口(21)より入った冷却風は、途中
で直角方向に屈曲されて弁開部通路(16)を通り、前
部側冷却風通路(25)へ合流して共に入口(23)よ
り配置されるが、このとき、前部側冷却風通路(23)
の冷却風量が多く直進性が強いと、弁開部通路(16)
を通って流れてくる風量が減少し、そのため、該弁開部
の冷却風を充分行ない得なくなる。そこで、この実施例
では、この直進側前部側冷却風通路(25)の出口(2
4)  (入口)面積を減少させ、これによって、該前
部側冷却風通路(25)の流量を少なくしたものである
That is, as shown in FIG. 1, during push-in cooling, the cooling air that enters from the front side outlet (24) flows in a substantially straight line and is discharged to the outside from the front side inlet (23). Ru. On the other hand, the cooling air that enters from the rear side outlet (21) is bent in the right angle direction midway through, passes through the valve opening passage (16), joins the front side cooling air passage (25), and flows together with the inlet (23). ), but at this time, the front side cooling air passage (23)
If the cooling air volume is large and the straightness is strong, the valve opening passage (16)
The amount of air flowing through the valve opening is reduced and therefore the valve opening is no longer sufficiently cooled. Therefore, in this embodiment, the outlet (2
4) The (inlet) area is reduced, thereby reducing the flow rate of the front side cooling air passage (25).

発明の効果 以上の如く、この発明によれば、押込み型冷却方式の場
合には、その出口側となる一部の入口を塞ぐことによっ
て弁開部側へ冷却風量を多く流し、他方、吸込み型冷却
方式の場合には、前記入口を開放することによって、該
吸込み方の場合に必要される風量を充分確保できるから
、仮に、上記人0を塞くための蓋板やガイド等を取り替
える必要があるとしてもこれらは小物部品であり、シリ
ンダヘノ]゛自身を取り替える場合に比較して、遥かに
低コストで製作できるという効果がある。
Effects of the Invention As described above, according to the present invention, in the case of a forced type cooling system, a large amount of cooling air is allowed to flow toward the valve opening side by blocking a part of the inlet serving as the outlet side; In the case of the cooling method, by opening the inlet, the amount of air required for the suction method can be secured sufficiently, so even if it is necessary to replace the cover plate, guide, etc. for blocking the above-mentioned person 0. Even if there are any, these are small parts and have the advantage of being able to be manufactured at a much lower cost than replacing the cylinder head itself.

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

第1図は本発明シリンダヘソ1′の水平断面図、第2図
はエンジン全体の要部縦断正面図、第3図はシリンダヘ
ッドへのガイドの取付り構造を示す分解斜視図、第4図
は押込み型冷却方式の場合のガイドの斜視図である。 +31−−シリンダへソド、 <10) −=冷却ファ
ン、(19)  (20)  (23)−m−入口、(
21)  (24)−出口、(22)’  (25)−
冷却風通路、(26)−弁開部通路、(29)  (3
2)−−ガイド。 特許 出願人 ヤンマーディーゼル株式会社代理人弁理
士 樽   本   久   幸区 寸 ?) 起X N      夕 −ゝ−2
Fig. 1 is a horizontal sectional view of the cylinder belly button 1' of the present invention, Fig. 2 is a vertical sectional front view of the main parts of the entire engine, Fig. 3 is an exploded perspective view showing the mounting structure of the guide to the cylinder head, and Fig. 4 is FIG. 3 is a perspective view of a guide in the case of a push-in cooling method. +31--To the cylinder, <10)-=Cooling fan, (19) (20) (23)-m-Inlet, (
21) (24)-Exit, (22)' (25)-
Cooling air passage, (26) - Valve opening passage, (29) (3
2) --Guide. Patent Applicant: Yanmar Diesel Co., Ltd. Representative Patent Attorney Hisashi Tarumoto ) KiX N Yu-ゝ-2

Claims (1)

【特許請求の範囲】 1、シリンダヘッドの側方に冷却ファンを配設し、同じ
くシリンダヘッドの前記冷却ファンと反対側に開口した
入口から該冷却ファン側出口に至る冷却風通路を形成し
、上記入口から出口を通って冷却ファン側へ冷却風を流
す吸込み型冷却方式に対し、冷却ファンから上記出口を
通って入口側へ冷却風を流す押込み型冷却方式のとき、
シリンダヘッド内の弁開部側へ冷却風を導くよう前記一
部の入口を塞ぐことにより、同一のシリンダヘッドを吸
込み型冷却方式と押込み型冷却方式の双方へ兼用可能と
したことを特徴とする空冷式内燃機関のシリンダヘッド
。 2、シリンダヘッドの前記出口側側面へ、該出口と冷却
ファンとを連絡するガイドを取付けるものにおいて、上
記出口の全面積を冷却ファン側へ連絡させる吸込み型冷
却方式用のガイドと、同じく出口の一部のみ冷却ファン
側へ連絡させる押込み型冷却方式用のガイドとを選択取
付けすることを特徴とする特許請求の範囲第1項記載の
空冷式内燃機関のシリンダヘッド。
[Claims] 1. A cooling fan is disposed on the side of the cylinder head, and a cooling air passage is formed from an inlet opening on the side opposite to the cooling fan of the cylinder head to an outlet on the side of the cooling fan, In contrast to the suction type cooling system in which cooling air flows from the inlet to the cooling fan side through the outlet, in the case of a push type cooling system in which cooling air flows from the cooling fan to the inlet side through the outlet,
By blocking some of the inlets so as to guide the cooling air to the valve opening side in the cylinder head, the same cylinder head can be used for both the suction type cooling system and the push type cooling system. Cylinder head of an air-cooled internal combustion engine. 2. A guide for connecting the outlet and the cooling fan is attached to the side surface of the cylinder head on the outlet side, and a guide for the suction type cooling system that connects the entire area of the outlet to the cooling fan side is similar to a guide for the outlet. 2. The cylinder head of an air-cooled internal combustion engine according to claim 1, wherein a guide for a push-in type cooling system is selectively attached, with only a portion communicating with the cooling fan side.
JP25663984A 1984-12-04 1984-12-04 Cylinder head for air-cooled type internal combustion engine Granted JPS61135960A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25663984A JPS61135960A (en) 1984-12-04 1984-12-04 Cylinder head for air-cooled type internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25663984A JPS61135960A (en) 1984-12-04 1984-12-04 Cylinder head for air-cooled type internal combustion engine

Publications (2)

Publication Number Publication Date
JPS61135960A true JPS61135960A (en) 1986-06-23
JPH0148387B2 JPH0148387B2 (en) 1989-10-19

Family

ID=17295395

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25663984A Granted JPS61135960A (en) 1984-12-04 1984-12-04 Cylinder head for air-cooled type internal combustion engine

Country Status (1)

Country Link
JP (1) JPS61135960A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006008868A1 (en) * 2004-07-22 2006-01-26 Yanmar Co., Ltd. Engine
WO2011134380A1 (en) * 2010-04-26 2011-11-03 隆鑫通用动力股份有限公司 Cylinder head valve arrangement structure and air-cooled diesel engine including the same
CN102400811A (en) * 2011-12-19 2012-04-04 力帆实业(集团)股份有限公司 Air cylinder head for three-air-valve engine
WO2012051791A1 (en) * 2010-10-19 2012-04-26 无锡开普动力有限公司 Cooling structure for engine cylinder head

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006008868A1 (en) * 2004-07-22 2006-01-26 Yanmar Co., Ltd. Engine
US7694655B2 (en) 2004-07-22 2010-04-13 Yanmar Co., Ltd. Engine
KR101131883B1 (en) * 2004-07-22 2012-04-03 얀마 가부시키가이샤 Engine
WO2011134380A1 (en) * 2010-04-26 2011-11-03 隆鑫通用动力股份有限公司 Cylinder head valve arrangement structure and air-cooled diesel engine including the same
WO2012051791A1 (en) * 2010-10-19 2012-04-26 无锡开普动力有限公司 Cooling structure for engine cylinder head
CN102400811A (en) * 2011-12-19 2012-04-04 力帆实业(集团)股份有限公司 Air cylinder head for three-air-valve engine

Also Published As

Publication number Publication date
JPH0148387B2 (en) 1989-10-19

Similar Documents

Publication Publication Date Title
US5005553A (en) Ventilation system for automotive engine
KR101131883B1 (en) Engine
US4958613A (en) Internal combustion engine with crankcase ventilation system
EP3940223A1 (en) Engine device
JP4392300B2 (en) Cylinder head cooling structure
JPS61135960A (en) Cylinder head for air-cooled type internal combustion engine
JP3137397B2 (en) Oil separator for blow-by gas reduction unit
JP3836900B2 (en) Turbocharger mount
JPH0517416Y2 (en)
JP2005220883A (en) Upper body structure of engine
JPH08284767A (en) Intake device for v-type multiple cylinder engine
JP3978815B2 (en) Vehicle outside air introduction structure
JPH09209848A (en) Exhaust gas recircuilating device
JPH0648094Y2 (en) Blow-by gas oil separator in internal combustion engine
US4520627A (en) Turbocharged internal combustion engine
JPH0232857Y2 (en)
JP6645154B2 (en) Intake manifold
JPS5815223Y2 (en) Engine oil pan cooling system for soundproof engine working equipment
JP2523458Y2 (en) Engine intake manifold device
JPS6187914A (en) &lt;=ylinder head cooling device for internal-combustion engine
JPH0238019Y2 (en)
JP2706955B2 (en) Blow-by gas / oil separator for horizontally opposed engines
JPH0141861Y2 (en)
JPH03491Y2 (en)
JP2001132426A (en) Blow-by gas recirculation device

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees