JPS6329862Y2 - - Google Patents
Info
- Publication number
- JPS6329862Y2 JPS6329862Y2 JP1981121109U JP12110981U JPS6329862Y2 JP S6329862 Y2 JPS6329862 Y2 JP S6329862Y2 JP 1981121109 U JP1981121109 U JP 1981121109U JP 12110981 U JP12110981 U JP 12110981U JP S6329862 Y2 JPS6329862 Y2 JP S6329862Y2
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- cylinder
- water passage
- cylinder block
- 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
- 239000000498 cooling water Substances 0.000 claims description 60
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は、冷却性能の向上、特にシリンダ部
間の熱だまりを解消するようにしたエンジンのシ
リンダブロツク構造に関するものである。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an engine cylinder block structure that improves cooling performance, and in particular eliminates heat accumulation between cylinder sections.
（従来技術）
第３図に示すシリンダブロツク１０の外周壁１
０ａと、シリンダ部１１の外周との間に、冷却水
通路１２を形成した多気筒エンジンのシリンダブ
ロツクにあつては、冷却水の通過し難いシリンダ
ボア間１３に対応するシリンダ部１１ａに熱だま
りが生じ易く、そのためこの部分に亀裂を生じる
おそれがあり、シリンダブロツク１０の信頼性と
耐久性を損なう問題がある。また、シリンダボア
間１３に対応する部分１１ａが他の部分よりも高
くなつて片寄ることになり、燃費が悪くなるなど
の欠点を有している。(Prior art) Outer peripheral wall 1 of cylinder block 10 shown in FIG.
In the case of a cylinder block of a multi-cylinder engine in which a cooling water passage 12 is formed between the cooling water passage 12 and the outer periphery of the cylinder portion 11, heat may accumulate in the cylinder portion 11a corresponding to the cylinder bore gap 13 through which cooling water is difficult to pass. Therefore, there is a risk of cracks occurring in this portion, which poses a problem of impairing the reliability and durability of the cylinder block 10. Furthermore, the portion 11a corresponding to the cylinder bore space 13 is higher than other portions and is offset, resulting in disadvantages such as poor fuel efficiency.
上記の欠点を解消して、特にシリンダボア間の
冷却性能を向上させるため、すでに実開昭52−
113105号において、シリンダボア間のボア壁にボ
ア列に沿つた両側のジヤケツトを連通するパイプ
を設け、冷却媒体のバイパス路を形成したシリン
ダブロツクが提案されている。 In order to eliminate the above drawbacks and improve the cooling performance especially between the cylinder bores,
No. 113105 proposes a cylinder block in which a pipe is provided on the bore wall between the cylinder bores to communicate the jackets on both sides along the bore row, thereby forming a bypass path for the cooling medium.
しかしながら、上記のものは、両側のジヤケツ
トを連通するパイプを設けただけの構成であつ
て、冷却媒体、つまり冷却水を強制的にシリンダ
ボア間に指向させる手段を講じていないため、冷
却水は上記パイプ内を通過し難く、したがつて、
実際上は冷却性能を向上することができない欠点
を有している。 However, the above structure only has a pipe that communicates the jackets on both sides, and there is no means for forcing the cooling medium, that is, the cooling water, to be directed between the cylinder bores. It is difficult to pass through the pipe, therefore,
In practice, it has the disadvantage that cooling performance cannot be improved.
このようなシリンダボア間の熱だまりの問題に
関して、例えば実開昭55−132315号公報に見られ
るように、シリンダ列の一側に冷却水導管を設
け、この冷却水導管に、隣接する各シリンダ部の
間隙に冷却水を噴出する噴孔を形成するようにし
たものが提案されている。 Regarding this problem of heat accumulation between cylinder bores, for example, as seen in Japanese Utility Model Application Publication No. 55-132315, a cooling water conduit is provided on one side of the cylinder row, and each adjacent cylinder part is connected to this cooling water conduit. It has been proposed that a nozzle hole for spouting cooling water is formed in the gap.
しかし、このような構成とした場合には、シリ
ンダブロツク内に、別途、冷却水導管を設けなけ
ればならず、部品点数の増加、あるいはシリンダ
ブロツクの構造の複雑化をきたすという問題があ
る。 However, with such a configuration, a cooling water conduit must be provided separately within the cylinder block, resulting in an increase in the number of parts or a complicated structure of the cylinder block.
そこで、本考案の目的は、簡単な構成でシリン
ダ部間の熱だまりを解消するようにしたエンジン
のシリンダブロツク構造を提供することを目的と
する。 SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a cylinder block structure for an engine that is simple in construction and eliminates heat buildup between cylinder sections.
（技術的課題を達成するための手段、作用）
上記技術的課題を達成すべく、本考案にあつて
は、シリンダブロツク内の冷却水通路を、隣接す
るシリンダ部間の間隙を通り、一のシリンダ部の
一方の外側壁側から他のシリンダ部の他方の外側
壁側へと、冷却水をシリンダブロツクの長手方向
に蛇行させる主冷却水通路と、前記各シリンダ部
の前記主冷却水通路とは反対の外側壁側の少なく
とも上部に設けられ上流および下流端が主冷却水
通路と連通する副冷却水通路とで構成し、該副冷
却水通路の通路面積を、前記主冷却水通路の通路
面積よりも小さく構成してある。(Means and effects for achieving the technical problem) In order to achieve the above technical problem, in the present invention, the cooling water passage in the cylinder block passes through the gap between adjacent cylinder parts, and A main cooling water passage that meanderes cooling water in the longitudinal direction of the cylinder block from one outer wall side of the cylinder part to the other outer wall side of the other cylinder part, and the main cooling water passage of each of the cylinder parts. consists of a sub-cooling water passage provided at least in the upper part of the opposite outer wall side and having upstream and downstream ends communicating with the main cooling water passage, and the passage area of the sub-cooling water passage is set to be equal to or smaller than that of the main cooling water passage. It is configured to be smaller than the area.
すなわち、本考案は、シリンダブロツク内の冷
却水通路の通路面積に着目し、隣接するシリンダ
部において、一のシリンダ部では一方の外側壁側
に、他のシリンダ部では他方の外側壁側に、
夫々、通路面積の相対的に小さな副冷却水通路と
するようにして、強制的にシリンダブロツク内の
冷却水の本流を隣接するシリンダ部の間隙を通つ
て一方の外側壁側から他方の外側壁側へというよ
うに、シリンダブロツクの長手方向に蛇行するよ
うにしたものである。そして、上記副冷却水通路
はシリンダ部周回りの熱分布を考慮して、少なく
とも上記シリンダ部の上部に設けるようにしてあ
る。 That is, the present invention focuses on the passage area of the cooling water passage in the cylinder block, and in adjacent cylinder parts, one cylinder part has a cooling water passage on one outer wall side, and the other cylinder part has a cooling water passage on the other outer wall side.
Each sub-cooling water passage has a relatively small passage area, and the main flow of cooling water in the cylinder block is forced to flow from one outer wall side to the other outer wall side through the gap between adjacent cylinder parts. It is designed to meander in the longitudinal direction of the cylinder block. The sub-cooling water passage is provided at least in the upper part of the cylinder part in consideration of heat distribution around the cylinder part.
（実施例）
以下、この考案の実施例を図面に従つて説明す
る。(Example) Hereinafter, an example of this invention will be described according to the drawings.
第１図において、１はエンジンのシリンダブロ
ツク、２は各気筒のシリンダ部を示す、シリンダ
ブロツク１の外周壁１ａとシリンダ部２の外周の
間に冷却水通路３を形成している。 In FIG. 1, reference numeral 1 indicates a cylinder block of an engine, and reference numeral 2 indicates a cylinder section of each cylinder. A cooling water passage 3 is formed between an outer peripheral wall 1a of the cylinder block 1 and an outer periphery of the cylinder section 2.
上記冷却水通路３は、実線矢印Ａで示すような
各シリンダ部２の一方の外側壁側２ａと、シリン
ダボア間、つまり隣接する各シリンダ部２の間隙
２ｂとを通つて、シリンダブロツク１の長手方向
に蛇行する主冷却水通路３ａと、点線矢印Ｂで示
すような各シリンダ部２の他方の外側壁側２ｃに
設けられて、上流および下流側が上記主冷却水通
路３ａと連通する副冷却水通路３ｂとで構成さ
れ、該副冷却水通路３ｂは第２図で明らかなよう
に、シリンダ部２の上部に設けられ、またその通
路面積を主冷却水通路３ａの通路面積より小さく
設定している。図中４はシリンダヘツド、５はピ
ストン、６は排気弁、７は吸気弁、８はシリンダ
ブロツク１の冷却水通路３と、シリンダヘツド４
の冷却水通路９とを連通する連通孔で、シリンダ
ブロツク１の冷却水通路３内の冷却水の一部が該
連通孔８を通つてシリンダヘツド４の冷却水通路
９に供給される構成となつている。 The cooling water passage 3 passes along the longitudinal direction of the cylinder block 1 through one outer wall side 2a of each cylinder part 2 as shown by solid arrow A and the gap 2b between the cylinder bores, that is, the adjacent cylinder parts 2. A main cooling water passage 3a meandering in the direction, and a sub-cooling water provided on the other outer wall side 2c of each cylinder portion 2 as shown by the dotted arrow B, and whose upstream and downstream sides communicate with the main cooling water passage 3a. As is clear from FIG. 2, the auxiliary cooling water passage 3b is provided at the upper part of the cylinder portion 2, and its passage area is set smaller than that of the main cooling water passage 3a. There is. In the figure, 4 is the cylinder head, 5 is the piston, 6 is the exhaust valve, 7 is the intake valve, 8 is the cooling water passage 3 of the cylinder block 1, and the cylinder head 4.
A part of the cooling water in the cooling water passage 3 of the cylinder block 1 is supplied to the cooling water passage 9 of the cylinder head 4 through the communication hole 8. It's summery.
上記構成において、冷却水通路３の主冷却水通
路３ａの通路面積よりも、副冷却水通路３ｂの通
路面積を小さく設定して絞つているため、冷却水
流に対する抵抗は当然副冷却水通路３ｂの方が大
きくなる。したがつて、冷却水は隣接する各シリ
ンダ部２の間隙２ｂを通つて、シリンダブロツク
１の長手方向に蛇行する主冷却水通路３ａに多量
に流れる。すなわち、副冷却水通路３ｂに生じる
流体抵抗によつて、冷却水は上記間隙２ｂへ強制
指向されて積極的に流れることになり、間隙２ｂ
に対応するシリンダ部２の冷却性能を向上させ
る。 In the above configuration, since the passage area of the auxiliary cooling water passage 3b is set to be smaller than the passage area of the main cooling water passage 3a of the cooling water passage 3, the resistance to the cooling water flow naturally occurs in the auxiliary cooling water passage 3b. is larger. Therefore, a large amount of cooling water flows into the main cooling water passage 3a which meanders in the longitudinal direction of the cylinder block 1 through the gaps 2b between adjacent cylinder parts 2. That is, due to the fluid resistance generated in the sub-cooling water passage 3b, the cooling water is forcibly directed toward the gap 2b and actively flows.
The cooling performance of the cylinder section 2 corresponding to the above is improved.
そのため、間隙２ｂに対応するシリンダ部２の
局部的な過熱現象が消失し、シリンダ部２の円周
方向の熱分布が均一化され、シリンダ部２の亀裂
を防止し、かつ燃費の向上を図ることができる。
また、副冷却水通路３ｂは、最も冷却を必要とす
るシリンダ部２の上部を通るようにしてあるた
め、効率的に好ましいものとすることができる。 Therefore, the local overheating phenomenon of the cylinder part 2 corresponding to the gap 2b disappears, and the heat distribution in the circumferential direction of the cylinder part 2 is made uniform, thereby preventing cracks in the cylinder part 2 and improving fuel efficiency. be able to.
Moreover, since the sub-cooling water passage 3b passes through the upper part of the cylinder part 2 which requires the most cooling, it can be made efficient and preferable.
（考案の効果）
以上説明したように、この考案は、通路面積変
えるという簡単な構成で、シリンダブロツク内を
流れる冷却水は、相対的に通路面積の小さな副冷
却水通路の通路抵抗によつて、各シリンダ部間隙
を通る主冷却水通路へ強制指向されることとな
る。したがつて、特に過熱し易いシリンダ部の間
隙の冷却性能を著しく向上させ得る利点がある。(Effects of the invention) As explained above, this invention has a simple structure of changing the passage area, and the cooling water flowing inside the cylinder block is controlled by the passage resistance of the sub-cooling water passage, which has a relatively small passage area. , the cooling water is forcibly directed to the main cooling water passage passing through each cylinder gap. Therefore, there is an advantage that the cooling performance of the gap in the cylinder section, which is particularly prone to overheating, can be significantly improved.
また、副冷却水通路がシリンダ部の少なくとも
上部に設けるようにしてあるため、熱負荷の大き
いシリンダ部上部の冷却性を阻害することはな
い。 Moreover, since the sub-cooling water passage is provided at least in the upper part of the cylinder part, the cooling performance of the upper part of the cylinder part, which has a large thermal load, is not hindered.
第１図はこの考案を抵抗したエンジンのシリン
ダブロツクを示す横断平面図、第２図は第１図に
おける−線に沿つた断面図、第３図は従来例
の横断平面図である。
１：シリンダブロツク、１ａ：外周壁、２：シ
リンダ部、２ａ：一方の外側壁側、２ｂ：間隙、
２ｃ：他方の外側壁側、３：冷却水通路、３ａ：
主冷却水通路、３ｂ：副冷却水通路。
FIG. 1 is a cross-sectional plan view showing the cylinder block of an engine that resisted this idea, FIG. 2 is a cross-sectional view taken along the - line in FIG. 1, and FIG. 3 is a cross-sectional plan view of a conventional example. 1: Cylinder block, 1a: Outer peripheral wall, 2: Cylinder part, 2a: One outer wall side, 2b: Gap,
2c: Other outer wall side, 3: Cooling water passage, 3a:
Main cooling water passage, 3b: sub-cooling water passage.
Claims (1)
の間に冷却水通路を形成してなる多気筒エンジン
のシリンダブロツク構造において、 上記冷却水通路を、隣接するシリンダ部間の間
隙を通り、一のシリンダ部の一方の外側壁側から
他のシリンダ部の他方の外側壁側へと、冷却水を
シリンダブロツクの長手方向に蛇行させる主冷却
水通路と、前記各シリンダ部の前記主冷却水通路
とは反対の外側壁側の少なくとも上部に設けられ
上流および下流端が主冷却水通路と連通する副冷
却水通路とで構成し、 該副冷却水通路の通路面積を、前記主冷却水通
路の通路面積よりも小さく構成してなる、 ことを特徴とするエンジンのシリンダブロツク構
造。[Claims for Utility Model Registration] In a cylinder block structure for a multi-cylinder engine in which a cooling water passage is formed between the outer peripheral wall of the cylinder block and the outer periphery of the cylinder part, the cooling water passage is connected between adjacent cylinder parts. A main cooling water passage that meanderes cooling water in the longitudinal direction of the cylinder block from one outer wall side of one cylinder section to the other outer wall side of the other cylinder section through the gap, and A sub-cooling water passage is provided at least in the upper part of the outer wall opposite to the main cooling water passage, and the upstream and downstream ends thereof communicate with the main cooling water passage, and the passage area of the sub-cooling water passage is set as above. An engine cylinder block structure characterized by having a passage area smaller than that of a main cooling water passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12110981U JPS5827548U (en) | 1981-08-15 | 1981-08-15 | Engine cylinder block structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12110981U JPS5827548U (en) | 1981-08-15 | 1981-08-15 | Engine cylinder block structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5827548U JPS5827548U (en) | 1983-02-22 |
| JPS6329862Y2 true JPS6329862Y2 (en) | 1988-08-10 |
Family
ID=29915053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12110981U Granted JPS5827548U (en) | 1981-08-15 | 1981-08-15 | Engine cylinder block structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5827548U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07109969B2 (en) * | 1989-08-31 | 1995-11-22 | キンセキ株式会社 | Electrode structure of piezoelectric vibrator |
| JPH0437210A (en) * | 1990-05-31 | 1992-02-07 | Kinseki Ltd | Electrode structure of piezoelectric vibrator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5732273Y2 (en) * | 1976-10-05 | 1982-07-15 | ||
| JPS6040840Y2 (en) * | 1979-03-14 | 1985-12-10 | ヤンマーディーゼル株式会社 | Internal combustion engine cylinder liner cooling system |
-
1981
- 1981-08-15 JP JP12110981U patent/JPS5827548U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5827548U (en) | 1983-02-22 |
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