JPH0117628Y2 - - Google Patents
Info
- Publication number
- JPH0117628Y2 JPH0117628Y2 JP1982145701U JP14570182U JPH0117628Y2 JP H0117628 Y2 JPH0117628 Y2 JP H0117628Y2 JP 1982145701 U JP1982145701 U JP 1982145701U JP 14570182 U JP14570182 U JP 14570182U JP H0117628 Y2 JPH0117628 Y2 JP H0117628Y2
- Authority
- JP
- Japan
- Prior art keywords
- passage
- cylinder
- cooling air
- cam chain
- air 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.)
- Expired
Links
- 238000001816 cooling Methods 0.000 claims description 29
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】 本考案はシリンダヘツドの冷却装置に関する。[Detailed explanation of the idea] The present invention relates to a cooling device for a cylinder head.
一般にオーバヘツドカム軸を有する４サイクル
エンジンにおいては、シリンダの側壁にカムチエ
ン室を設け、該室とシリンダとの間に冷却風通路
を設けると共に、シリンダヘツドの燃焼室とカム
軸室との間に冷却風通路を設けている。しかしな
がらこれらの通路は互に別個に形成されているた
め冷却風の吹き抜けが大きく冷却効果において不
十分であつた。 Generally, in a four-cycle engine having an overhead camshaft, a cam chain chamber is provided on the side wall of the cylinder, a cooling air passage is provided between the chamber and the cylinder, and a cooling air passage is provided between the combustion chamber of the cylinder head and the camshaft chamber. A passageway is provided. However, since these passages are formed separately from each other, a large amount of cooling air blows through, resulting in an insufficient cooling effect.
本考案はかゝる冷却効果の不十分さをおぎなう
ことを目的としたもので、シリンダブロツクの側
壁に、カムチエン室と、該カムチエン室とシリン
ダとの間のシリンダブロツク冷却風通路とを設け
ると共にシリンダヘツドに、燃焼室とカム軸室と
の間のシリンダヘツド冷却風通路を設けたものに
おいて、前記シリンダヘツド冷却風通路を車体進
行方向に向つて開口する中央の流入路と該流入路
に直交して前記カムチエン室と反対側のエンジン
側方に開口する流出路とをもつて形成し、該流出
路に、前記カムチエン室側において前記シリンダ
ブロツク冷却風通路と連通する風穴を設けたこと
を特徴とする。 The purpose of the present invention is to overcome the insufficiency of the cooling effect by providing a cam chain chamber on the side wall of the cylinder block and a cylinder block cooling air passage between the cam chain chamber and the cylinder. In a cylinder head in which a cylinder head cooling air passage is provided between the combustion chamber and the camshaft chamber, the cylinder head cooling air passage has a central inflow passage that opens toward the direction in which the vehicle body travels, and a central inflow passage that is perpendicular to the inflow passage. and an outflow passage opening on the side of the engine opposite to the cam chain chamber, and the outflow passage is provided with an air hole communicating with the cylinder block cooling air passage on the side of the cam chain chamber. shall be.
図面でシリンダヘツド１に形成される冷却風通
路２は第２図に示すように該シリンダブロツクを
搭載する車体の進行方向に向つて開口する中央の
流入路２ａと、該流入路２ａに直交する流出路２
ｂとからなり、該流出路２ｂの一端をシリンダブ
ロツク外に開口すると共に他端をカムチエン室５
の隔壁６まで延長し、その下面に風穴７を形成
し、該風穴７を介してシリンダブロツク３に形成
した冷却風通路４と連通させた。即ち、シリンダ
ブロツク３に形成される冷却風通路４は該シリン
ダを搭載する車体の進行方向に向つてシリンダブ
ロツクを前後に貫通するようにそのカムチエン室
５の側面に沿つて上下に複数個設けられるが、そ
の上部通路４にはシリンダヘツドとの合せ面に向
つて前記風穴７と整合する風穴８を開口し、これ
ら風穴７，８を介して前記通路２，４は連通させ
た。図中９はカム軸、１０はチエン、１１は燃焼
室、１２はピストンを示す。 As shown in FIG. 2, the cooling air passage 2 formed in the cylinder head 1 has a central inlet passage 2a that opens in the direction of movement of the vehicle body on which the cylinder block is mounted, and is perpendicular to the inlet passage 2a. Outflow channel 2
b, one end of the outflow passage 2b is opened to the outside of the cylinder block, and the other end is opened to the cam chain chamber 5.
An air hole 7 was formed in the lower surface of the partition wall 6, and the cooling air passage 4 formed in the cylinder block 3 was communicated with the air hole 7 through the air hole 7. That is, a plurality of cooling air passages 4 formed in the cylinder block 3 are provided vertically along the side surface of the cam chain chamber 5 so as to penetrate the cylinder block back and forth in the traveling direction of the vehicle body in which the cylinder is mounted. However, an air hole 8 aligned with the air hole 7 is opened in the upper passage 4 toward the mating surface with the cylinder head, and the passages 2 and 4 are communicated through the air holes 7 and 8. In the figure, 9 is a camshaft, 10 is a chain, 11 is a combustion chamber, and 12 is a piston.
このように本考案によるときは、シリンダヘツ
ド冷却風通路２を車体進行方向に向つて開口する
中央の流入路２ａと該流入路２ａに直交してシリ
ンダブロツク３のカムチエン室５と反対側のエン
ジン側方に開口する流出路２ｂとをもつて形成し
たからシリンダヘツド冷却風通路２は運転中の冷
却効果を高めることが出来、而もその流出路２ｂ
にはカムチエン室５側においてシリンダブロツク
３に設けたシリンダブロツク冷却風通路４と連通
する風穴７を設けたから、ヘツド冷却風はカムチ
エン室側からも導出することができて、ヘツドの
冷却効果を一層高めることができると共にシリン
ダの放熱性があまりよくないカムチエン室５側を
有効に冷却することができ特に停車時においては
シリンダブロツク冷却風通路４にてシリンダを冷
却して暖められた空気がスムーズにシリンダヘツ
ド１に抜けるため停車時のエンジンの冷却性を良
好にすることができ、かくて冷却エンジンに設け
られる冷却フインを小型化してエンジンの小型軽
量化に役立つ等の効果を有する。 In this way, according to the present invention, the cylinder head cooling air passage 2 has a central inlet passage 2a that opens in the direction of movement of the vehicle body, and an engine on the side opposite to the cam chain chamber 5 of the cylinder block 3, which is perpendicular to the inlet passage 2a. Since the cylinder head cooling air passage 2 is formed with an outflow passage 2b that opens laterally, the cooling effect during operation can be enhanced, and the outflow passage 2b
Since the air hole 7 is provided on the cam chain chamber 5 side to communicate with the cylinder block cooling air passage 4 provided in the cylinder block 3, the head cooling air can also be led out from the cam chain chamber side, further improving the head cooling effect. At the same time, it is possible to effectively cool the cam chain chamber 5 side, where the heat dissipation of the cylinder is not very good.Especially when the cylinder is stopped, the cylinder block cooling air passage 4 cools the cylinder and the warmed air can be smoothly dissipated. Since it passes through the cylinder head 1, it is possible to improve the cooling performance of the engine when the engine is stopped, and this has the effect of reducing the size of the cooling fins provided in the cooled engine, thereby helping to reduce the size and weight of the engine.
図面は本考案の一実施例を示すもので第１図は
縦断面図、第２図は第１図Ａ−Ａ線断面図であ
る。
１……シリンダヘツド、２……冷却風通路、３
……シリンダ、４……冷却風通路。
The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional view, and FIG. 2 is a sectional view taken along the line A--A in FIG. 1. 1...Cylinder head, 2...Cooling air passage, 3
...Cylinder, 4...Cooling air passage.
Claims (1)
該カムチエン室とシリンダとの間のシリンダブロ
ツク冷却風通路とを設けると共にシリンダヘツド
に、燃焼室とカム軸室との間のシリンダヘツド冷
却風通路を設けたものにおいて、前記シリンダヘ
ツド冷却風通路を車体進行方向に向つて開口する
中央の流入路と該流入路に直交して前記カムチエ
ン室と反対側のエンジン側方に開口する流出路と
をもつて形成し、該流出路に、前記カムチエン室
側において前記シリンダブロツク冷却風通路と連
通する風穴を設けたことを特徴とするシリンダヘ
ツドの冷却装置。 On the side wall of the cylinder block, there is a cam chain chamber,
A cylinder block cooling air passage is provided between the cam chain chamber and the cylinder, and a cylinder head cooling air passage is provided between the combustion chamber and the camshaft chamber in the cylinder head, in which the cylinder head cooling air passage is provided. The cam chain chamber is formed with a central inflow passage that opens toward the direction in which the vehicle body travels, and an outflow passage that is perpendicular to the inflow passage and opens to the side of the engine opposite to the cam chain chamber. A cooling device for a cylinder head, characterized in that an air hole communicating with the cylinder block cooling air passage is provided on the side thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14570182U JPS5949748U (en) | 1982-09-28 | 1982-09-28 | Cylinder head cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14570182U JPS5949748U (en) | 1982-09-28 | 1982-09-28 | Cylinder head cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5949748U JPS5949748U (en) | 1984-04-02 |
| JPH0117628Y2 true JPH0117628Y2 (en) | 1989-05-23 |
Family
ID=30324539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14570182U Granted JPS5949748U (en) | 1982-09-28 | 1982-09-28 | Cylinder head cooling system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5949748U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4504263B2 (en) * | 2005-06-23 | 2010-07-14 | 本田技研工業株式会社 | Air-cooled engine |
| MY144791A (en) | 2005-06-23 | 2011-11-15 | Honda Motor Co Ltd | Air-cooled engine |
| JP5415363B2 (en) * | 2010-06-11 | 2014-02-12 | 本田技研工業株式会社 | Cylinder head structure of internal combustion engine |
-
1982
- 1982-09-28 JP JP14570182U patent/JPS5949748U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5949748U (en) | 1984-04-02 |
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