JPH0378517A - Cooling structure of engine - Google Patents
Cooling structure of engineInfo
- Publication number
- JPH0378517A JPH0378517A JP21262489A JP21262489A JPH0378517A JP H0378517 A JPH0378517 A JP H0378517A JP 21262489 A JP21262489 A JP 21262489A JP 21262489 A JP21262489 A JP 21262489A JP H0378517 A JPH0378517 A JP H0378517A
- Authority
- JP
- Japan
- Prior art keywords
- liner
- circumferential
- wall surface
- wall
- groove
- 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
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 11
- 239000000110 cooling liquid Substances 0.000 claims description 7
- 239000010687 lubricating oil Substances 0.000 abstract description 6
- 239000003921 oil Substances 0.000 abstract description 6
- 230000008646 thermal stress Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、エンジンの冷却構造に関するものである。[Detailed description of the invention] (Industrial application field) The present invention relates to an engine cooling structure.
（従来の技術）
車両用ディーゼルエンジン等湿式ライナを具えたニンジ
ンにおいて、ライナの外壁面に多数の円周溝又は螺旋溝
を設け、同円周溝又は螺旋溝内に潤滑油等の冷却液体を
流通させるようにした冷却構造が既に提案されている。(Prior art) In a vehicle equipped with a wet liner such as a diesel engine for a vehicle, a large number of circumferential grooves or spiral grooves are provided on the outer wall surface of the liner, and a cooling liquid such as lubricating oil is poured into the circumferential groove or spiral groove. Cooling structures that allow circulation have already been proposed.
この種の二／ソｙ冷却構造では、ライナ外壁面に比較的
密に円周溝又は螺旋溝が配置され、これらの溝内に冷却
液体が強制的に流通されるので、ライナ各部の温度分布
が比較的均一になる特徴があり、温度分布の著しい不均
等に基づくライナの過大変形や大きな熱応力の発生を効
果的に回避し得る利点がある。In this type of bi/soy cooling structure, circumferential grooves or spiral grooves are arranged relatively densely on the outer wall surface of the liner, and the cooling liquid is forced to flow through these grooves, so the temperature distribution in each part of the liner is improved. This has the advantage that excessive deformation of the liner and generation of large thermal stress due to markedly uneven temperature distribution can be effectively avoided.
（発明が解決しようとする課題）
上述したライナ外壁面の円周溝又は螺旋溝の深さは、従
来は円周方向全周にわたり実質的に均一である。このた
め隣接するシリンダから流れてくる熱の影響をうけてデ
ア間におけるライナ壁の温度が、他の部分のライナ壁の
温度より若干高くなる傾向がある。(Problems to be Solved by the Invention) Conventionally, the depth of the circumferential groove or spiral groove on the outer wall surface of the liner is substantially uniform over the entire circumferential direction. Therefore, the temperature of the liner wall between the cylinders tends to be slightly higher than the temperature of the liner wall in other parts due to the influence of heat flowing from adjacent cylinders.
本発明は、上記事実に鑑み創案されたもので、ライナの
外壁面に形成される円周溝又は螺旋溝の形状に工夫を加
えることによって、ライナ壁の温度を全周にわたシ従来
よシ均等ならしめることができるようにしたエンジンの
冷却構造を提供することを目的とするものである。The present invention has been devised in view of the above-mentioned facts, and by adding innovation to the shape of the circumferential groove or spiral groove formed on the outer wall surface of the liner, the temperature of the liner wall can be improved over the entire circumference compared to the conventional one. The object of the present invention is to provide an engine cooling structure that can achieve uniform cooling.
（課題を解決するための手段）
上記目的を達成するため、本発明に係る二／ジンの冷却
構造は、クランクケースのシリンダがア部にライナを嵌
装し、同うイチの外壁面に冷却液体を流通させる円周溝
又は螺旋溝を設けたものにおいて、上記円周溝又は螺旋
溝の溝底とライナ内壁面との間のライナ壁の厚さを円周
方向に変化させたことを特徴とするものである。(Means for Solving the Problem) In order to achieve the above object, the cooling structure of the second engine according to the present invention is such that the cylinder of the crankcase is fitted with a liner in the part A, and the cylinder is cooled on the outer wall surface of the same one. A device provided with a circumferential groove or a spiral groove for flowing liquid, characterized in that the thickness of the liner wall between the bottom of the circumferential groove or the spiral groove and the inner wall surface of the liner is varied in the circumferential direction. That is.
（作用）
本発明によれば、ライナの外壁面に形成される円周溝又
は螺旋溝の深さを円周方向に関し変化させること１例え
ば上述したボア間部分の溝の深さを他の部分より大きく
し、ビア間部分のライナ壁の厚さを薄くすることによっ
て、この部分の熱放散を増大させることができ、この結
果円周方向のライナ壁温度の一層の均等化が達成される
。(Function) According to the present invention, the depth of the circumferential groove or the spiral groove formed on the outer wall surface of the liner can be changed in the circumferential direction. By making the liner wall larger and reducing the thickness of the liner wall in the inter-via section, heat dissipation in this section can be increased, resulting in greater uniformity of circumferential liner wall temperature.
（実施例）
以下本発明の実施例を添付図面について具体的に説明す
る。図中符号１０はトラック用の直接噴射式ディーゼル
エンジ／を総括的に示し、１２は同エンジンのクランク
ケース、１４はシリンダヘッド、１６は上記クランクケ
ース１２に形成されたデア部１８内に嵌装されたシリン
ダライナ。(Example) Examples of the present invention will be specifically described below with reference to the accompanying drawings. In the figure, reference numeral 10 generally indicates a direct injection diesel engine for trucks, 12 is a crankcase of the engine, 14 is a cylinder head, and 16 is fitted into a dere part 18 formed in the crankcase 12. cylinder liner.
２０はシリンダライナ１６内に嵌装されたピストン、２
２はコネクティングロッド、２４はクランクケース１２
内にクランク軸線方向に延在して形成された入口側オイ
ルギヤラリ、２６は同クランクケース１２内にクランク
軸線方向に延在して形成された出口側オイルギヤラリ、
２８は上記シリンダヘッド１４に装着された燃料噴射ノ
ズルである。20 is a piston fitted in the cylinder liner 16;
2 is the connecting rod, 24 is the crankcase 12
An inlet oil gear lary 26 is formed within the crankcase 12 and extends in the crank axial direction;
28 is a fuel injection nozzle attached to the cylinder head 14.
上記ライナ１６の外壁面には１図示の実施例の場合、シ
リンダ軸線方向に適宜の間隔を存して多数の円周溝３０
が形成され、これらの円周溝３０は、ライナ１６の外壁
面にシリンダ軸線方向に延在して形成された自体周知の
連通溝（図示せず）によって適数の群に区分され、上記
入口側オイルギヤラリ２４から供給された冷却用潤滑油
は群別された円周溝３０内を順次流れて出口側オイルギ
ヤラリ２６から排出される。In the case of the embodiment shown in FIG. 1, the outer wall surface of the liner 16 has a large number of circumferential grooves 30 at appropriate intervals in the cylinder axis direction.
These circumferential grooves 30 are divided into an appropriate number of groups by well-known communication grooves (not shown) formed on the outer wall surface of the liner 16 extending in the cylinder axial direction, and The cooling lubricating oil supplied from the side oil gearing 24 sequentially flows through the grouped circumferential grooves 30 and is discharged from the outlet side oil gearing 26.
上記円周溝３０は、夫々隣接するシリンダのデア間部分
即ちクランク軸線方向Ｏ−０の深さす、が。The circumferential groove 30 has a depth in the portion between the cylinders adjacent to each other, that is, in the crank axis direction O-0.
クランク軸線に対し直角方向の深さｂ２よシ大きく形成
されている。換言すれば、上記円周溝３０の溝底とライ
ナ１６の内壁面との間のライナ壁の厚さが、デア間部分
において他の部分より小さく形成されている。通常の場
合、隣接するシリンダ内で行なわれる爆発燃焼のために
、ライナ１６のボア間部分に熱が停滞し易く他の部分よ
り高温になる傾向があるが、上記のように円周溝３０の
深さをボア間において深くして間部のライナ壁の厚さを
他の部分より小さくすることによって、２７間のライナ
壁から冷却液体即ち潤滑油に伝達される熱（ｔ’に他の
部分より大きくシ、この結果、２７間におけるライナ壁
の温度上昇を防止し又は効果的に低減してライナ１６の
円周方向の温度分布を従来より均等化することができ、
ライナ１６の半径方向の熱変形を全周にわたり均等化し
て過大な熱応力の発生を抑止することができる。The depth is larger than b2 in the direction perpendicular to the crank axis. In other words, the thickness of the liner wall between the groove bottom of the circumferential groove 30 and the inner wall surface of the liner 16 is smaller in the inter-diale portion than in other portions. Normally, heat tends to stagnate in the area between the bores of the liner 16 due to explosive combustion that occurs in adjacent cylinders, and the temperature tends to be higher than other areas. By increasing the depth between the bores so that the thickness of the liner wall there is smaller than elsewhere, the heat transferred from the liner wall between the bores to the cooling liquid or lubricating oil (t') As a result, it is possible to prevent or effectively reduce the temperature rise of the liner wall between the lines 16 and 27, making the temperature distribution in the circumferential direction of the liner 16 more uniform than before,
It is possible to equalize the thermal deformation in the radial direction of the liner 16 over the entire circumference, thereby suppressing the generation of excessive thermal stress.
なお図示の構成では、ボア間部分だけ円周溝３０の深さ
ｂｌが大きく形成されているが、ライナ１６を保持する
クランクケース１２の構成如何によっては、ボア間以外
の部分にも熱の放散が悪く高温になり易い部分が存在す
ることがあり、この場合当該高温になシ易いライナ部分
の溝の深さを大きくすることが好ましい。また、図示の
実施例では円周溝３０が例示されているが、ライナ１６
の軸線の周りに螺旋状に形成された螺旋溝の場合も同様
に本発明を適用することができ、・更にライナ軸線方向
に多数並設された円周溝又は螺旋溝のすべてについて、
ライナ壁の厚さを円周方向に関し変化させる必要はな□
・ぐ、円周方向の温度分布の変動が著しいライナ部分の
円周溝又は螺旋溝のみに本発明を適用することができる
。なおまた、冷却液体として上記実施例に例示した潤滑
油に代え冷却水等地の冷却液体を使用することができ、
また上記円周溝又は螺旋溝内を流れてライナ１６を冷却
した潤滑油を第１図に示されているように出口側オイル
ギヤラリ２６に収容せず、直接ライナ１６の外周下端部
分からオイルパン内に流下させることも勿論可能である
。In the illustrated configuration, the depth bl of the circumferential groove 30 is formed to be large only in the portion between the bores, but depending on the configuration of the crankcase 12 that holds the liner 16, heat may be dissipated in portions other than between the bores. There may be a portion where the liner has a poor temperature and is easily exposed to high temperatures. In this case, it is preferable to increase the depth of the groove in the liner portion that is susceptible to high temperatures. Additionally, although the illustrated embodiment illustrates the circumferential groove 30, the liner 16
The present invention can be similarly applied to the case of a spiral groove formed in a spiral around the axis of the liner, and furthermore, for all of the circumferential grooves or spiral grooves arranged in parallel in the liner axis direction,
There is no need to vary the thickness of the liner wall in the circumferential direction.
- The present invention can be applied only to circumferential grooves or spiral grooves in the liner portion where the temperature distribution in the circumferential direction fluctuates significantly. Furthermore, as the cooling liquid, a cooling liquid such as cooling water can be used instead of the lubricating oil exemplified in the above embodiment.
Furthermore, the lubricating oil that has cooled the liner 16 by flowing through the circumferential groove or the spiral groove is not stored in the outlet side oil gear lary 26 as shown in FIG. Of course, it is also possible to allow the water to flow down.
（発明の効果）
叙上のように、本発明に係るエンジンの冷却構造は、ク
ランクケースのシリンダゲア部にライナを嵌装し、同う
イチの外壁面に冷却液体を流通させる円周溝又は螺旋溝
を設けたものにおいて、上記円周溝又は螺旋溝の溝底と
ライナ内壁面との間のライナ壁の厚さを円周方向に関し
変化させたことを特徴とし、ライナの円周方向における
温度分布を均一化して熱変形及び熱応力の発生を低減し
、ライナの耐久性及び信頼性を改善し得る効果を奏する
ものである。(Effects of the Invention) As described above, the engine cooling structure according to the present invention includes a liner fitted to the cylinder gear part of the crankcase, and a circumferential groove or spiral for circulating the cooling liquid on the outer wall surface of the same. A grooved device is characterized in that the thickness of the liner wall between the bottom of the circumferential groove or the spiral groove and the inner wall surface of the liner is varied in the circumferential direction, and the temperature in the circumferential direction of the liner is This has the effect of making the distribution uniform, reducing the occurrence of thermal deformation and thermal stress, and improving the durability and reliability of the liner.
第１図は本発明の一実施例を示す概略断面図、第２図は
第１図の■−■線に沿う断面図（ただしピストン２０は
除去されている）、第３図は第２図の■−■線に沿う部
分的断面図、第４図は第２図のＩＶ−ＩＶ線に沿う部分
的断面図でる。
１０・・・エンジン、１２・・・クランクケース、１４
・・・シリ／ダヘッド、１６−・・シリンダライナ、２
０・・・ピストン、
Ｏ・・・円周溝。
第１図
第２図FIG. 1 is a schematic cross-sectional view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG. 1 (however, the piston 20 is removed), and FIG. FIG. 4 is a partial sectional view taken along line IV--IV in FIG. 2. FIG. 10...Engine, 12...Crankcase, 14
...Cylinder/da head, 16-...Cylinder liner, 2
0... Piston, O... Circumferential groove. Figure 1 Figure 2
Claims (1)
同ライナの外壁面に冷却液体を流通させる円周溝又は螺
旋溝を設けたものにおいて、上記円周溝又は螺旋溝の溝
底とライナ内壁面との間のライナ壁の厚さを円周方向に
関し変化させたことを特徴とするエンジンの冷却構造。Fit the liner into the cylinder bore of the crankcase,
In the case where the outer wall surface of the liner is provided with a circumferential groove or a spiral groove for circulating the cooling liquid, the thickness of the liner wall between the bottom of the circumferential groove or spiral groove and the inner wall surface of the liner is measured in the circumferential direction. An engine cooling structure characterized by changes in the following aspects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21262489A JPH0378517A (en) | 1989-08-18 | 1989-08-18 | Cooling structure of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21262489A JPH0378517A (en) | 1989-08-18 | 1989-08-18 | Cooling structure of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0378517A true JPH0378517A (en) | 1991-04-03 |
Family
ID=16625761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21262489A Pending JPH0378517A (en) | 1989-08-18 | 1989-08-18 | Cooling structure of engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0378517A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04342859A (en) * | 1991-05-20 | 1992-11-30 | Teikoku Piston Ring Co Ltd | Cooling structure of cylinder liner |
| JPH0530443U (en) * | 1991-09-25 | 1993-04-23 | 帝国ピストンリング株式会社 | Cylinder liner cooling structure |
| US6679526B2 (en) | 1999-08-27 | 2004-01-20 | Sumitomo Metal Industries, Ltd. | Threaded joint for an oil well pipe |
| US7866706B2 (en) | 2004-04-06 | 2011-01-11 | Sumitomo Metal Industries, Ltd. | Threaded joint for steel pipe |
| CN106988922A (en) * | 2017-03-29 | 2017-07-28 | 江苏常发农业装备股份有限公司 | A kind of single-cylinder air-cooled diesel engine |
-
1989
- 1989-08-18 JP JP21262489A patent/JPH0378517A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04342859A (en) * | 1991-05-20 | 1992-11-30 | Teikoku Piston Ring Co Ltd | Cooling structure of cylinder liner |
| JPH0530443U (en) * | 1991-09-25 | 1993-04-23 | 帝国ピストンリング株式会社 | Cylinder liner cooling structure |
| US6679526B2 (en) | 1999-08-27 | 2004-01-20 | Sumitomo Metal Industries, Ltd. | Threaded joint for an oil well pipe |
| US7866706B2 (en) | 2004-04-06 | 2011-01-11 | Sumitomo Metal Industries, Ltd. | Threaded joint for steel pipe |
| CN106988922A (en) * | 2017-03-29 | 2017-07-28 | 江苏常发农业装备股份有限公司 | A kind of single-cylinder air-cooled diesel engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5086733A (en) | Cooling system for multi-cylinder engine | |
| WO2016001988A1 (en) | Internal combustion engine | |
| US4683844A (en) | Cylinder block and head assembly for internal combustion engines | |
| JP4395002B2 (en) | Cylinder block cooling structure | |
| US4753201A (en) | Crankshaft supporting structure for multicylinder internal combustion engines | |
| US8689744B2 (en) | Cooling device and insert for water jacket of internal combustion engine | |
| GB2201197A (en) | I.c. engine cylinder block water jacket | |
| JPH0378517A (en) | Cooling structure of engine | |
| US11187181B2 (en) | Combustion engine housing having cylinder cooling | |
| JP2014231791A (en) | Internal combustion engine | |
| US2012739A (en) | Cylinder block construction for air cooled engines | |
| US4542719A (en) | Engine cooling system | |
| JPH06330808A (en) | Cylinder block structure of water cooled engine | |
| JPH0613861B2 (en) | Two-cycle engine piston | |
| JP2516800B2 (en) | Multi-cylinder engine cooling system | |
| US5176113A (en) | Cylinder liner | |
| JPS62253945A (en) | Cylinder cooling structure of liquid-cooling internal combustion engine | |
| JPH0378519A (en) | Cooling device for engine | |
| US2953126A (en) | Engine coolant distribution | |
| JP4297618B2 (en) | Cylinder block cooling structure for internal combustion engine | |
| KR100475811B1 (en) | Cooling apparatus for cylinder liner | |
| JPH0248658Y2 (en) | ||
| WO2016001987A1 (en) | Internal combustion engine | |
| JPH0378518A (en) | Cooling structure for engine | |
| JPS6210453Y2 (en) |