JPS6349045B2 - - Google Patents
Info
- Publication number
- JPS6349045B2 JPS6349045B2 JP22945085A JP22945085A JPS6349045B2 JP S6349045 B2 JPS6349045 B2 JP S6349045B2 JP 22945085 A JP22945085 A JP 22945085A JP 22945085 A JP22945085 A JP 22945085A JP S6349045 B2 JPS6349045 B2 JP S6349045B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder head
- fan
- cooling air
- cowling
- fan cowling
- 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.)
- Expired
Links
- 238000001816 cooling Methods 0.000 claims description 26
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 4
- 239000002826 coolant Substances 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P1/00—Air cooling
- F01P1/02—Arrangements for cooling cylinders or cylinder heads, e.g. ducting cooling-air from its pressure source to cylinders or along cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P5/06—Guiding or ducting air to, or from, ducted fans
-
- 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
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
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)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、小形立形内燃機関のシリンダヘツド
冷却装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cylinder head cooling device for a small vertical internal combustion engine.
周知のように、内燃機関がその作動を支障なく
運転できるためには、冷却用媒体でもつて、シリ
ンダ等を冷却する必要がある。冷却用媒体として
空気を使用する空冷内燃機関は、冷却用送風フア
ンをクランク軸から直接駆動し、加熱されるシリ
ンダ等に冷却空気を吹きつけて冷却を図つてい
る。その冷却空気量は、一般に約１m3／psminが
大体必要とされているので、かかる冷却空気量を
発生させる送風フアンの大きさは、機関の出力に
よつて略決まつてくる。したがつて、送風フアン
をカバーするフアンカウリングの大きさもその送
風フアンに相応して大きくとつている。そして、
一般には、そのフアンカウリングの膨大化によつ
て、シリンダヘツドの冷却通路も兼ねている。
As is well known, in order for an internal combustion engine to operate without any trouble, it is necessary to cool the cylinders and the like using a cooling medium. BACKGROUND ART Air-cooled internal combustion engines that use air as a cooling medium drive a cooling fan directly from the crankshaft to blow cooling air onto heated cylinders and the like to cool them. Since the amount of cooling air is generally required to be approximately 1 m 3 /psmin, the size of the blower fan that generates this amount of cooling air is approximately determined by the output of the engine. Therefore, the size of the fan cowling that covers the blower fan is also set to be large enough to correspond to the blower fan. and,
Generally, the enlarged fan cowling also serves as a cooling passage for the cylinder head.
ところが、従来の立形空冷内燃機関のメタル胴
方式にしても、側蓋方式にしても、かようにフア
ンカウリングを膨大させてシリンダヘツド頂部ま
で延長させ、しかも、吸気通路とクランク軸とを
互いに直角方向に配置し、エアクリーナと排気マ
フラーとは相対して設けている構造としているの
で、フアンカウリングが大形となるのみならず、
フアンカウリングの上方部でシリンダヘツド全側
面に冷却空気を漫然と導入していることから冷却
効果もよくない。 However, in both the metal body type and the side cover type of conventional vertical air-cooled internal combustion engines, the fan cowling is enlarged and extends to the top of the cylinder head, and the intake passage and crankshaft are connected to each other. The structure is such that the air cleaner and exhaust muffler are arranged at right angles, facing each other, so not only does the fan cowling become larger, but also
The cooling effect is not good because cooling air is introduced inadvertently to all sides of the cylinder head above the fan cowling.
そのため、フアンカウリングから導入される冷
却空気をシリンダヘツドに効率よく導くために、
冷却空気通路を特設しようとすれば、かかる膨大
させたフアンカウリングがあるため、エアクリー
ナの取付位置がフアンカウリングの一方側に限定
され、また、フアンカウリングが機関本体より浮
き出されるため、騒音を遮断し難い欠点が新たに
生じる。それで、吸気通路の個所のみのフアンカ
ウリングを欠如させた形状とすることも考えられ
るが、かかる場合、フアンカウリングの形状が金
型絞り（プレス成形）の際、破断し易くなるた
め、冷却空気通路を形成し難い欠点が生じる。 Therefore, in order to efficiently guide the cooling air introduced from the fan cowling to the cylinder head,
If you try to install a special cooling air passage, the enlarged fan cowling will limit the installation position of the air cleaner to one side of the fan cowling, and the fan cowling will be protruded from the engine body, making it difficult to block noise. A new drawback arises that is difficult to deal with. Therefore, it is conceivable to create a shape in which the fan cowling is omitted only at the intake passage, but in such a case, the shape of the fan cowling is likely to break during mold drawing (press forming), so the cooling air passage A disadvantage arises in that it is difficult to form.
そこで本発明者らは、従来技術の問題点を解決
しようと上のような試行錯誤の結果、フアンカウ
リングの高さをクランクケースの頂部と略同一の
大きさとし、該フアンカウリングの天井で開口し
た入口部およびシリンダヘツドカバー内に開口し
た出口部を有する冷却空気通路部材を特設し、か
つ、該冷却空気通路部材に機関吸気通路の中間部
材を一体形成した内燃機関のシリンダヘツド冷却
兼吸気通路用アダブターを創作して、従来の不具
合を一挙に解消しようとするものである。
In order to solve the problems of the conventional technology, the inventors of the present invention, as a result of trial and error as described above, set the height of the fan cowling to be approximately the same size as the top of the crankcase, and created an opening at the ceiling of the fan cowling. A cylinder head cooling/intake passage for an internal combustion engine in which a cooling air passage member having an inlet and an outlet opening in the cylinder head cover is specially provided, and an intermediate member of the engine intake passage is integrally formed with the cooling air passage member. The idea is to create an adapter that will solve all of the problems that existed in the past all at once.
以下、本発明の構成を実施例にもとづき詳細に
説明する。第１図は本発明の実施例の全体側面
図、第２図は要部側面図、第３図は第２図の反対
側よりみた要部側面図、第４図は第３図のＡ方向
側面図を示す。 Hereinafter, the configuration of the present invention will be explained in detail based on examples. Fig. 1 is an overall side view of an embodiment of the present invention, Fig. 2 is a side view of the main part, Fig. 3 is a side view of the main part seen from the opposite side of Fig. 2, and Fig. 4 is a direction A in Fig. 3. A side view is shown.
第１図において、１はクランク室、２はクラン
ク室１の一側に設けたフアンカウリングでその断
面を示し、フアンカウリング２には図示しない送
風フアンをクランク軸３に固着して内蔵してい
る。４はシリンダヘツドカバーで、その頂部には
ロツカカバー５を載置固着している。６は燃料タ
ンク、７は排気マフラーを示す。 In Fig. 1, 1 is a crank chamber, and 2 is a fan cowling provided on one side of the crank chamber 1, the cross section of which is shown.The fan cowling 2 has a built-in ventilation fan (not shown) fixed to the crankshaft 3. . 4 is a cylinder head cover, on the top of which a rocker cover 5 is placed and fixed. 6 indicates a fuel tank, and 7 indicates an exhaust muffler.
シリンダヘツドカバー４のクランク軸３の軸方
向の一側でフアンカウリング２の側に、吸気管用
アダブター８を固着している。 An intake pipe adapter 8 is fixed to the fan cowling 2 on one side of the cylinder head cover 4 in the axial direction of the crankshaft 3.
該アダブター８の構造は、第２図より第４図に
示している。すなわち、機関の吸気ポートに連通
する吸気通路部材９を冷却空気通路部材１０とを
一体に形成して一つの部材を構成している。 The structure of the adapter 8 is shown in FIGS. 2 to 4. That is, the intake passage member 9 communicating with the intake port of the engine is integrally formed with the cooling air passage member 10 to constitute one member.
該吸気通路部材９は、四角状の筒１１になつて
おり、筒１１の両端にフランジ１２，１３を設
け、該フランジ１２，１３に対面２隅に、ボルト
用挿通孔１４，１４を穿設し、機関吸気通路の中
間部材を構成している。 The intake passage member 9 has a rectangular cylinder 11, and flanges 12 and 13 are provided at both ends of the cylinder 11, and bolt insertion holes 14 and 14 are bored in two opposing corners of the flanges 12 and 13. It constitutes an intermediate member of the engine intake passage.
該冷却空気通路部材１０は、椀体を伏せた状態
において、その中央を上下方向に切断した半椀体
１５で構成している。入口部１６はフアンカウリ
ング２の天井に挿入し、出口部１７はシリンダヘ
ツドカバー４内に開口している。 The cooling air passage member 10 is constituted by a half-bowl body 15 which is cut in the vertical direction at the center with the bowl body turned upside down. The inlet part 16 is inserted into the ceiling of the fan cowling 2, and the outlet part 17 opens into the cylinder head cover 4.
本実施例によれば、送風フアンによつて送られ
る冷却空気の一部が、第１図の矢印Ｂのように、
半椀体１５に導入され、シリンダヘツドカバー４
内に導かれ、シリンダヘツドに吹き付け、これを
冷却する。 According to this embodiment, a part of the cooling air sent by the blower fan, as indicated by arrow B in FIG.
It is introduced into the half bowl body 15 and the cylinder head cover 4
It is directed into the cylinder head and is blown onto the cylinder head to cool it.
なお、エアクリーナ（図示せず）は該吸気管用
アダブター８の一方のフランジ１２に着脱自在に
固着されており、該アダブター８自体は、シリン
ダヘツドにボルトをボルト用挿通孔１４，１４に
挿入して固着している。 Note that an air cleaner (not shown) is detachably fixed to one flange 12 of the intake pipe adapter 8, and the adapter 8 itself can be assembled by inserting bolts into the bolt insertion holes 14, 14 into the cylinder head. It's stuck.
以上要するに本発明は、特許請求の範囲に記載
された構成を採用したので、以下の効果を奏す
る。 In summary, since the present invention employs the structure described in the claims, the following effects are achieved.
〔発明の効果〕
冷却空気を連通する吸気管用アダブターでも
つて、フアンカウリング内の冷却空気を一旦絞
ることにより、流速を速め、シリンダヘツドカ
バーの必要個所へ導入できシリンダヘツドに吹
き付けて、冷却効果を向上することができる。[Effects of the Invention] Even with an adapter for an intake pipe that communicates cooling air, by once restricting the cooling air inside the fan cowling, the flow velocity is increased and the air can be introduced to the required part of the cylinder head cover, and it can be blown onto the cylinder head to increase the cooling effect. can be improved.
フアンカウリングの高さをクランクケースの
頂部と略同一のものとしているので、フアンカ
ウリングを小形化することができる。 Since the height of the fan cowling is approximately the same as the top of the crankcase, the fan cowling can be made smaller.
機関吸気通路と冷却空気通路とを１個の吸気
管用アダブターで形成しているので、部品点数
が節減できるばかりか、その機関への組立も容
易となる。 Since the engine intake passage and the cooling air passage are formed by one intake pipe adapter, not only the number of parts can be reduced, but also assembly into the engine is facilitated.
第１図は本発明の実施例の全体側面図、第２図
は要部側面図、第３図は第２図の反対側よりみた
要部側面図、第４図は第３図のＡ方向側面図を示
す。
２……フアンカウリング、８……吸気管用アダ
ブター、９……吸気通路部材、１０……冷却空気
通路部材、１５……半椀体。
Fig. 1 is an overall side view of an embodiment of the present invention, Fig. 2 is a side view of the main part, Fig. 3 is a side view of the main part seen from the opposite side of Fig. 2, and Fig. 4 is a direction A in Fig. 3. A side view is shown. 2... Fan cowling, 8... Intake pipe adapter, 9... Intake passage member, 10... Cooling air passage member, 15... Half bowl body.
Claims (1)
もつフアンカウリングと、 該フアンカウリングの天井で開口した入口部お
よびシリンダヘツドカバー内に開口した出口部を
有して、フアンカウリング内の冷却空気をシリン
ダヘツドカバー内に連通させる冷却空気通路部材
と、一端にエアクリーナを装着した機関吸気通路
を構成する中間部材を該冷却空気通路部材と一体
的に形成した吸気管用アダプターと、 を備えた小形立形空冷内燃機関のシリンダヘツド
冷却装置。[Scope of Claims] 1. A fan comprising: a fan cowling having substantially the same height as the top of an engine crankcase; an inlet opening in the ceiling of the fan cowling; and an outlet opening in the cylinder head cover. a cooling air passage member that communicates cooling air in the cowling with the inside of the cylinder head cover; and an intake pipe adapter in which an intermediate member forming an engine intake passage having an air cleaner attached to one end is integrally formed with the cooling air passage member; Cylinder head cooling system for a small vertical air-cooled internal combustion engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22945085A JPS6187914A (en) | 1985-10-14 | 1985-10-14 | <=ylinder head cooling device for internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22945085A JPS6187914A (en) | 1985-10-14 | 1985-10-14 | <=ylinder head cooling device for internal-combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6187914A JPS6187914A (en) | 1986-05-06 |
| JPS6349045B2 true JPS6349045B2 (en) | 1988-10-03 |
Family
ID=16892395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22945085A Granted JPS6187914A (en) | 1985-10-14 | 1985-10-14 | <=ylinder head cooling device for internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6187914A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5391070A (en) * | 1990-11-02 | 1995-02-21 | Fanuc Ltd | Injection molding machine equipped with a movable display unit |
| JPH07232364A (en) * | 1994-02-24 | 1995-09-05 | Fanuc Ltd | Injection molder equipped with display equipment |
-
1985
- 1985-10-14 JP JP22945085A patent/JPS6187914A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6187914A (en) | 1986-05-06 |
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