JP2566838B2 - Siamese type cylinder cooling system for liquid-cooled multi-cylinder engine - Google Patents
Siamese type cylinder cooling system for liquid-cooled multi-cylinder engineInfo
- Publication number
- JP2566838B2 JP2566838B2 JP2145221A JP14522190A JP2566838B2 JP 2566838 B2 JP2566838 B2 JP 2566838B2 JP 2145221 A JP2145221 A JP 2145221A JP 14522190 A JP14522190 A JP 14522190A JP 2566838 B2 JP2566838 B2 JP 2566838B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- liquid
- cooling
- wall portion
- continuous
- 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 - Fee Related
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
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/108—Siamese-type cylinders, i.e. cylinders cast together
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)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、液冷多気筒エンジンのサイアミーズ形シリ
ンダ冷却装置に関する。The present invention relates to a Siamese type cylinder cooling device for a liquid-cooled multi-cylinder engine.
＜従来技術＞ 本発明は、その基本構造として、例えば第１図及び第
５図に示すように、液冷多気筒エンジン１の液冷ジャケ
ット２内で、前後に並ぶ複数本のシリンダ３同士をその
隣接部で一体に連続させてサイアミーズ形シリンダとし
て形成し、シリンダ３に摺動自在に内嵌するピストン４
に冷却用オイル供給手段５により冷却用オイルを供給す
るように構成したものに関する。<Prior Art> As a basic structure of the present invention, for example, as shown in FIGS. 1 and 5, in a liquid cooling jacket 2 of a liquid cooling multi-cylinder engine 1, a plurality of cylinders 3 arranged side by side are arranged. A piston 4 slidably fitted into the cylinder 3 which is formed as a siamese type cylinder by continuously adjoining at its adjacent portion.
Further, the present invention relates to the one configured to supply the cooling oil by the cooling oil supply means 5.
従来では、冷却用オイル供給手段５により冷却用オイ
ルを供給する箇所は、第５図に示すように、ピストン４
の内面であった。Conventionally, the place where the cooling oil is supplied by the cooling oil supply means 5 is, as shown in FIG.
Was inside.
＜発明が解決しようとする課題＞ しかし、上記従来例では、次の問題がある。<Problems to be Solved by the Invention> However, the above conventional example has the following problems.
（１）サイアミーズ形シリンダではシリンダ同士間の連
続肉壁部分がそれ以外の部分と比べ高温になるため、従
来例のように、ピストンの内面に冷却用オイルを供給す
ることによりシリンダの周側壁全体を冷却するもので
は、冷却効果が小さく、上記連続肉壁部分で油温が上昇
して、潤滑性能が低くなる。(1) In the Siamese type cylinder, since the continuous wall portion between the cylinders becomes hotter than the other portions, the cooling oil is supplied to the inner surface of the piston as in the conventional example, so that the entire peripheral wall of the cylinder is In the case of cooling the oil, the cooling effect is small, the oil temperature rises in the continuous meat wall portion, and the lubricating performance becomes low.
しかも、上記連続肉壁部分での冷却効果が小さいこと
から、シリンダの上記連続肉壁部分とそれ以外の部分と
で温度落差が大きく、シリンダが大きく歪む。Moreover, since the cooling effect at the continuous wall portion is small, the temperature difference between the continuous wall portion of the cylinder and the other portions is large, and the cylinder is greatly distorted.
このため、スカッフや焼付きが起こり易く、エンジン
の許容最大出力が低くなる。For this reason, scuffing and seizure are likely to occur, and the maximum allowable output of the engine becomes low.
（２）上記スカッフや焼付きを抑制するために、上記連
続肉壁部分を厚くする必要がある。この場合には、エン
ジンの全長が長くなる。本発明は、上記問題を解決する
事を課題とする。(2) In order to suppress the scuff and seizure, it is necessary to thicken the continuous wall portion. In this case, the total length of the engine becomes long. An object of the present invention is to solve the above problems.
＜課題を解決するための手段＞ 本発明は、上記課題を解決するため、例えば第１図に
示すように、次のように構成したものである。<Means for Solving the Problems> In order to solve the above problems, the present invention is configured as follows, for example, as shown in FIG.
即ち、冷却用オイル供給手段５は、シリンダ３とピス
トン４との摺動面間のうち、シリンダ３同士が隣接部で
一体に連続する連続肉壁部分６に臨む箇所のみに冷却用
オイルを供給するように構成したものである。That is, the cooling oil supply means 5 supplies the cooling oil only to the portion between the sliding surfaces of the cylinder 3 and the piston 4 which faces the continuous wall portion 6 where the cylinders 3 are adjacent and integrally continuous with each other. It is configured to do.
＜作用＞ 次に、作用を説明する。<Operation> Next, the operation will be described.
シリンダ３とピストン４との摺動面間のうち、シリン
ダ３同士が隣接部で一体に連続する連続肉壁部分６に臨
む箇所のみ（第２図において、×××印で示す箇所）に
冷却用オイルが供給されて、上記連続肉壁部分６に臨む
箇所のみを多量の冷却用オイルで冷却できて、上記連続
肉壁部分６のみを強力に冷却することができる。このた
め、上記連続肉壁部分６で油温が低くなり、潤滑性能が
高くなる。Among the sliding surfaces of the cylinder 3 and the piston 4, only the portion where the cylinders 3 face the continuous wall portion 6 that is integrally continuous at the adjacent portion (the portion indicated by XX mark in FIG. 2) is cooled. Since the working oil is supplied, only the portion facing the continuous meat wall portion 6 can be cooled with a large amount of cooling oil, and only the continuous meat wall portion 6 can be strongly cooled. Therefore, the oil temperature in the continuous wall portion 6 becomes low, and the lubricating performance becomes high.
しかも、上記連続肉壁部分６のみを強力に冷却するこ
とができることから、シリンダ３の上記連続肉壁部分６
とそれ以外の部分との温度落差が小さくなり、シリンダ
３の歪が無くなる。Moreover, since only the continuous wall portion 6 can be strongly cooled, the continuous wall portion 6 of the cylinder 3 can be cooled.
The temperature difference between the other parts and the other parts becomes smaller, and the distortion of the cylinder 3 is eliminated.
これにより、スカッフや焼付きが起こりにくい。 As a result, scuffing and seizure are less likely to occur.
＜発明の効果＞ 本発明は、上述のように構成され、作用することか
ら、次の効果を奏する。<Effects of the Invention> The present invention has the following effects since it is configured and operates as described above.
（イ）．サイアミーズシリンダでは、周知のように、シ
リンダ３の周壁のうちの連続肉壁部分６は、液冷ジャケ
ット２の冷却液で直接冷却されないため、これ以外のシ
リンダ周肉壁部分よりも局部的に高温になって過熱し、
シリンダ３が熱歪みを起こし易い。(I). In the Siamese cylinder, as is well known, the continuous wall portion 6 of the peripheral wall of the cylinder 3 is not directly cooled by the cooling liquid of the liquid cooling jacket 2, and therefore has a locally higher temperature than the other cylinder peripheral wall portions. Became overheated,
The cylinder 3 is likely to cause thermal strain.
本発明によると、この局部的に過熱される連続肉壁部
分６のみに集中して冷却用オイルを供給することによ
り、この連続肉壁部分６のみを冷却した分だけ、連続肉
壁部分６とこれ以外のシリンダ周肉壁部分との温度落差
が小さくなるので、シリンダ３の熱歪みを小さくして、
ピストン４の焼付きを防止することができる。According to the present invention, by supplying the cooling oil by concentrating only on the continuous meat wall portion 6 that is locally overheated, the continuous meat wall portion 6 and the continuous meat wall portion 6 are cooled as much as the continuous meat wall portion 6 is cooled. Since the temperature difference between the cylinder peripheral wall and other portions is smaller, the thermal strain of the cylinder 3 is reduced,
The seizure of the piston 4 can be prevented.
（ロ）．スカッフや焼付きが起こりにくいので、エンジ
ンの許容最大出力を高くすることができる。(B). Since scuffing and seizure hardly occur, the maximum allowable output of the engine can be increased.
（ハ）．上述のように、スカッフや焼付けが起こりにく
いので、連続肉壁部分を薄くできて、エンジンの全長を
短縮することができる。(C). As described above, since scuffing and baking do not easily occur, the continuous wall portion can be thinned and the total length of the engine can be shortened.
＜実施例＞ 本発明の実施例を、第１図乃至第４図に基づき説明す
る。<Example> An example of the present invention will be described with reference to Figs. 1 to 4.
本実施例では、エンジンは水冷（水冷に限るものでは
なく、油冷でもよい。）の多気筒エンジン１であり、こ
のエンジン１のシリンダは、シリンダブロック16内に形
成した水冷ジャケット（液冷ジャケット）２内で、前後
２本のシリンダ３同士がその隣接部で一体に連続するサ
イアミーズ形シリンダとして、形成されている。In the present embodiment, the engine is a water-cooled (not limited to water-cooled, oil-cooled) multi-cylinder engine 1. The cylinder of this engine 1 is a water-cooled jacket (liquid-cooled jacket) formed in a cylinder block 16. 2), the two front and rear cylinders 3 are formed as continuous siamese type cylinders adjacent to each other.
両シリンダ３と両シリンダ３内を摺動するピストン４
との摺動面間のうち、シリンダ３同士が隣接部で一体に
連続する連続肉壁部分６に臨む箇所のみ（第２図におい
て、×××印で示す箇所）には、冷却用オイル供給手段
５により冷却用オイルが供給される。Both cylinders 3 and pistons 4 that slide in both cylinders 3
Between the sliding surfaces of and, the cooling oil is supplied only to the portion where the cylinders 3 face the continuous wall portion 6 that is integrally continuous at the adjacent portion (the portion indicated by XXX mark in FIG. 2). Cooling oil is supplied by means 5.
冷却用オイル供給手段５は、第３図に示すように、ク
ランク軸７の軸受部８に付設されている。The cooling oil supply means 5 is attached to the bearing portion 8 of the crankshaft 7, as shown in FIG.
即ち、クランク軸７の軸受部８にオイル通路９及び噴
射口10が形成され、オイル通路９へはオイルパン11内の
オイルが潤滑ポンプ（図示略）等を介して圧送され、噴
射口10から上記連続肉壁部分６に臨む箇所に向けて冷却
用オイルが噴射される。That is, the oil passage 9 and the injection port 10 are formed in the bearing portion 8 of the crankshaft 7, and the oil in the oil pan 11 is pressure-fed to the oil passage 9 through a lubricating pump (not shown) or the like, and the oil is discharged from the injection port 10. Cooling oil is sprayed toward a portion facing the continuous meat wall portion 6.
また、第２図に示すように、上記連続肉壁部分６には
通水路12があけられており、この通水路12内を水冷ジャ
ケット２の冷却水が流通する構造であり、この冷却水の
流通によっても上記連続肉壁部分６は冷却される。Further, as shown in FIG. 2, a water passage 12 is opened in the continuous meat wall portion 6, and the cooling water of the water cooling jacket 2 flows through the water passage 12 and the cooling water is formed. The continuous wall portion 6 is also cooled by the circulation.
第４図には別実施例が示されており、コンロッド13、
ピストンピン14にオイル通路９を形成し、ピストンピン
内部の孔14aを介して、プラグ14bにあけた吹出し口15か
ら冷却用オイルを吹出すようにしたものである。FIG. 4 shows another embodiment, in which the connecting rod 13,
The oil passage 9 is formed in the piston pin 14, and the cooling oil is blown out from the blowout port 15 opened in the plug 14b through the hole 14a inside the piston pin.
図中、符号7a・7bは軸受、17はシリンダヘッドであ
る。In the figure, reference numerals 7a and 7b are bearings, and 17 is a cylinder head.
尚、上記実施例では、冷却用オイル供給手段５によ
り、上記連続肉壁部分６に臨む箇所を両方共冷却するよ
うにしているが、片方だけを冷却するようにしてもよ
い。In the above embodiment, the cooling oil supply means 5 is used to cool both the portions facing the continuous wall portion 6, but it is also possible to cool only one of them.
第１図乃至第４図は本発明の実施例を示し、第１図はエ
ンジンの縦断側面図、第２図はシリンダブロックの横断
平面図、第３図は第１図Ａ部の拡大図、第４図は別実施
例を示す要部断面図であり、第５図は従来例を示す要部
断面図である。 １……エンジン、２……液冷ジャケット、３……シリン
ダ、４……ピストン、５……冷却用オイル供給手段、６
……連続肉壁部分。1 to 4 show an embodiment of the present invention, FIG. 1 is a vertical sectional side view of an engine, FIG. 2 is a cross-sectional plan view of a cylinder block, and FIG. 3 is an enlarged view of part A of FIG. FIG. 4 is a cross-sectional view of an essential part showing another embodiment, and FIG. 5 is a cross-sectional view of the essential part showing a conventional example. 1 ... Engine, 2 ... Liquid cooling jacket, 3 ... Cylinder, 4 ... Piston, 5 ... Cooling oil supply means, 6
...... Continuous meat wall part.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高畑 正夫 大阪府堺市石津北町64 株式会社クボタ 堺製造所内 (56)参考文献 特開 昭63−253156（ＪＰ，Ａ) 特開 昭52−134944（ＪＰ，Ａ) 実開 平１−159120（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masao Takahata 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Plant (56) References JP-A-63-253156 (JP, A) JP-A-52-134944 ( JP, A) Actual Kaihei 1-159120 (JP, U)
Claims (1)
ト（２）内で、前後に並ぶ複数本のシリンダ（３）同士
をその隣接部で一体に連続させてサイアミーズ形シリン
ダとして形成し、 シリンダ（３）に摺動自在に内嵌するピストン（４）に
冷却用オイル供給手段（５）により冷却用オイルを供給
するように構成した液冷多気筒エンジンのサイアミーズ
形シリンダ冷却装置において、 冷却用オイル供給手段（５）は、シリンダ（３）とピス
トン（４）との摺動面間のうち、シリンダ（３）同士が
隣接部で一体に連続する連続肉壁部分（６）に臨む箇所
のみに冷却用オイルを供給するように構成した 事を特徴とする液冷多気筒エンジンのサイアミーズ形シ
リンダ冷却装置。1. A liquid cooling multi-cylinder engine (1) in which a plurality of cylinders (3) lined up in front and back are integrally connected to each other in a liquid cooling jacket (2) to form a Siamese type cylinder. In a Siamese type cylinder cooling device for a liquid-cooled multi-cylinder engine, configured to supply cooling oil to a piston (4) slidably fitted in a cylinder (3) by a cooling oil supply means (5), The cooling oil supply means (5) faces the continuous wall portion (6) where the cylinders (3) are integrally continuous at the adjacent portions, between the sliding surfaces of the cylinder (3) and the piston (4). A Siamese type cylinder cooling device for a liquid-cooled multi-cylinder engine, which is configured to supply cooling oil only to the points.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2145221A JP2566838B2 (en) | 1990-06-01 | 1990-06-01 | Siamese type cylinder cooling system for liquid-cooled multi-cylinder engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2145221A JP2566838B2 (en) | 1990-06-01 | 1990-06-01 | Siamese type cylinder cooling system for liquid-cooled multi-cylinder engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0441918A JPH0441918A (en) | 1992-02-12 |
| JP2566838B2 true JP2566838B2 (en) | 1996-12-25 |
Family
ID=15380159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2145221A Expired - Fee Related JP2566838B2 (en) | 1990-06-01 | 1990-06-01 | Siamese type cylinder cooling system for liquid-cooled multi-cylinder engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2566838B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10024207A1 (en) * | 2000-05-17 | 2002-01-24 | Man Nutzfahrzeuge Ag | Piston cooling for internal combustion engines |
| DE102010047325B4 (en) * | 2010-10-01 | 2021-11-18 | Daimler Ag | Internal combustion engine with a cylinder housing made of light metal cast and with cylinder liners made of rough cast |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52134944A (en) * | 1976-05-07 | 1977-11-11 | Fuji Heavy Ind Ltd | Piston for internal combustion engine |
| JPS63253156A (en) * | 1987-04-08 | 1988-10-20 | Daihatsu Motor Co Ltd | Cooling device for siamese type cylinder block |
| JPH01159120U (en) * | 1988-04-23 | 1989-11-02 |
-
1990
- 1990-06-01 JP JP2145221A patent/JP2566838B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0441918A (en) | 1992-02-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |