JPS63272950A - Cylinder block construction for engine - Google Patents
Cylinder block construction for engineInfo
- Publication number
- JPS63272950A JPS63272950A JP10595187A JP10595187A JPS63272950A JP S63272950 A JPS63272950 A JP S63272950A JP 10595187 A JP10595187 A JP 10595187A JP 10595187 A JP10595187 A JP 10595187A JP S63272950 A JPS63272950 A JP S63272950A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- side wall
- cast iron
- cylinder bore
- array
- 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
- 238000010276 construction Methods 0.000 title 1
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 12
- 229910001234 light alloy Inorganic materials 0.000 claims description 6
- 238000001816 cooling Methods 0.000 abstract description 10
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 6
- 239000000498 cooling water Substances 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000005266 casting Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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
-
- 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
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B2075/1804—Number of cylinders
- F02B2075/1812—Number of cylinders three
-
- 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
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
-
- 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
- F02F2200/00—Manufacturing
- F02F2200/06—Casting
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)
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シリンダブロック構造に係り、詳し
くは、軽合金で形成されるシリンダブロックのボア側壁
部に鋳鉄製のプレートが鋳込まれたエンジンのシリンダ
ブロック構造に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a cylinder block structure for an engine, and more specifically, a cylinder block made of a light alloy has a cast iron plate cast into the bore side wall of the cylinder block. Related to engine cylinder block structure.
従来、シリンダブロックはアルミ合金などの軽合金で形
成され軽量化が図られている（例えば実開昭５９−６４
４４６号公報参照）。更にこの様なシリンダブロックに
おいては、シリンダボアもアルミ合金で一体的に形成す
ることにより、軽量化を促進することができるものであ
るが、この場合においては、シリンダブロック全体の剛
性が低下してしまう。この剛性の低下を克服するにあた
っては、複数のシリンダボアを配列位置に一体的に連結
することが考えられる。また、冷却水を流通させるウォ
ータジャケットはシリンダボアの外側部、すなわち、シ
リンダ列の両側部にシリンダボアを囲繞し、かつシリン
ダ列方向に沿って冷却水を導くように設けられるという
構成上、各シリンダ列の中央部よりも、両側部における
シリンダボア側壁部の方がより効果的に冷却され、両者
間にかなりの温度差が発生する。そして、アルミ合金が
比較的に熱膨張率が大きいことから、上述のように、シ
リンダボア間を連結して剛性を向上させたものでは、高
温時にはシリンダ列方向に対する幅方向の伸びがシリン
ダ列両側部のそれよりも大きくなる。しかしながら、剛
性が高いため、その熱膨張は、剛性が低くかつ効果的に
冷却されて比較的に温度も低くなっている両側部に影響
を及ぼし、シリンダボア側壁部に歪変形を発生させると
いう問題があった。また、両側部が過度に冷却されやす
いため、冷却損失として放熱される熱量が大になるとい
う難点もあった。Conventionally, cylinder blocks have been made of light alloys such as aluminum alloys to reduce weight (for example,
(See Publication No. 446). Furthermore, in such a cylinder block, weight reduction can be promoted by integrally forming the cylinder bore with aluminum alloy, but in this case, the rigidity of the entire cylinder block decreases. . In order to overcome this decrease in rigidity, it is conceivable to integrally connect a plurality of cylinder bores at arranged positions. In addition, the water jacket through which cooling water flows is provided outside the cylinder bore, that is, on both sides of the cylinder row, to surround the cylinder bore and guide the cooling water along the direction of the cylinder row. The cylinder bore side walls on both sides are cooled more effectively than the center, creating a significant temperature difference between them. Since aluminum alloy has a relatively large coefficient of thermal expansion, as mentioned above, in the case where cylinder bores are connected to improve rigidity, at high temperatures, the elongation in the width direction with respect to the cylinder row direction is limited to both sides of the cylinder row. be larger than that of However, due to its high rigidity, its thermal expansion affects both sides, which have low rigidity and are effectively cooled and have a relatively low temperature, resulting in the problem of causing distortion in the cylinder bore side wall. there were. Furthermore, since both sides are likely to be excessively cooled, there is also the problem that a large amount of heat is radiated as cooling loss.
（発明が解決しようとする問題点）
本発明は、このような事情を考慮してなされ、シリンダ
ボア側壁部におけるシリンダ列の両側部の剛性を向上さ
せるとともに、熱伝導率を低下させてシリンダボア側壁
部の冷却時の温度分布の均一化を図り、シリンダボアの
熱変形が抑制されるようにするとともに、冷却損失を低
減させるようにしたエンジンのシリンダブロック構造を
提供することを目的とする。(Problems to be Solved by the Invention) The present invention has been made in consideration of the above circumstances, and improves the rigidity of both sides of the cylinder row in the cylinder bore side wall, and reduces the thermal conductivity of the cylinder bore side wall. It is an object of the present invention to provide a cylinder block structure for an engine, which achieves uniform temperature distribution during cooling, suppresses thermal deformation of a cylinder bore, and reduces cooling loss.
本発明の手段は、軽合金で形成されるエンジンのシリン
ダブロックにあって、複数のシリンダボアをその配列方
向に一体的に連結するとともに、シリンダ列方向と直交
する方向に位置するシリンダボア側壁部に、鋳鉄製のプ
レートを鋳込んだことである。The means of the present invention is provided in an engine cylinder block made of a light alloy, in which a plurality of cylinder bores are integrally connected in the arrangement direction thereof, and a cylinder bore side wall portion located in a direction perpendicular to the cylinder row direction has a This is because a cast iron plate was cast.
シリンダ列方向と直交する方向に位置するシリンダボア
側壁部に鋳込まれた鋳鉄製のプレートによってその部分
が補強されて剛性が向上され、シリンダボア側壁部のシ
リンダ列中央部との強度的な均衡が保たれ、変形しにく
くなっている。そして、プレートの熱伝導率が低いこと
から、冷却水によって過度に冷却されやすいシリンダボ
ア側壁部のシリンダ列方向と直交する方向に位置する両
側部からの放熱が抑制され、中央部との温度差が低減さ
れる。そのため、冷却損失として放出される熱量が低減
されるとともに、冷却効果が良好に発揮されて、シリン
ダボア側壁部のシリンダ列中央部における熱膨張が、両
側部に影響を及ぼして歪変形を発生させるようなことな
く、シリンダの変形が防止される。A cast iron plate cast into the cylinder bore side wall located in a direction perpendicular to the cylinder row direction reinforces that part and improves rigidity, maintaining a balance in strength between the cylinder bore side wall and the center of the cylinder row. It is less likely to sag or deform. Since the plate has low thermal conductivity, heat radiation from both sides of the cylinder bore side wall, which is easily cooled excessively by cooling water, in a direction perpendicular to the cylinder row direction, is suppressed, and the temperature difference with the center part is reduced. Reduced. Therefore, the amount of heat released as cooling loss is reduced, and the cooling effect is well exhibited, so that thermal expansion in the center of the cylinder row on the side wall of the cylinder bore affects both sides and causes distortion. This prevents deformation of the cylinder.
本発明のエンジンのシリンダブロック構造は、軽合金で
形成されるエンジンのシリンダブロックにあって、複数
のシリンダボアをその配列方向に一体的に連結するとと
もに、シリンダ列方向と直交する方向に位置するシリン
ダボア側壁部に、鋳鉄製のプレートを鋳込んだので、そ
の両側部の剛性が向上されるとともに、放熱量が低下さ
れて中央部との温度差が低減される。したがって、シリ
ンダの変形が防止されるとともに、冷却損失として放出
される熱量が低減される。The engine cylinder block structure of the present invention is an engine cylinder block made of a light alloy, in which a plurality of cylinder bores are integrally connected in the arrangement direction thereof, and the cylinder bores are located in a direction perpendicular to the cylinder row direction. Since cast iron plates are cast into the side walls, the rigidity of both sides is improved, and the amount of heat dissipated is reduced, reducing the temperature difference with the center. Therefore, deformation of the cylinder is prevented and the amount of heat released as cooling loss is reduced.
以下に本発明を実施例に基づいて詳細に説明する。 The present invention will be explained in detail below based on examples.
本例のエンジンのシリンダブロック構造は、軽合金で形
成されるエンジンのシリンダブロックに通用され、シリ
ンダの変形の防止と冷却損失の低減化を図るようにした
もので、以下のように構成される。The cylinder block structure of the engine in this example is commonly used for engine cylinder blocks made of light alloy, and is designed to prevent cylinder deformation and reduce cooling loss, and is configured as follows. .
Ｖ型６気筒エンジンの片側のシリンダ列におけるシリン
ダブロックを示す第１図にて、シリンダ列方向と直交す
る方向に位置するシリンダボア２の側壁部３鋳鉄製のプ
レート４が鋳込まれている。In FIG. 1 showing a cylinder block in one cylinder row of a V-type six-cylinder engine, a side wall portion 3 of a cylinder bore 2 located in a direction perpendicular to the cylinder row direction has a cast iron plate 4 cast therein.
シリンダブロック１は、アルミ合金で形成され、各シリ
ンダボア側壁部３の内面には、鋳鉄製のシリンダライナ
５が嵌入装着され、その外方を囲繞するように、略半円
筒状に形成された一対のプレート４がシリンダボア側壁
部３内に一体固定に配置されている。プレート４の外方
には、第２図に示すように、冷却水を流通させるための
ウォータジャケット６が、シリンダボア２のシリンダ列
の両側部１ａを囲繞するように配設されている。シリン
ダブロック１は、グイキャスト鋳造によって形成され、
第３図に示すように、ウォータジャケット６を形成する
ための金型７内に強力な磁石８を埋込み固定して、鋳造
時にプレート４が所定の位置からずれることがないよう
な配慮がなされる。The cylinder block 1 is made of aluminum alloy, and a cast iron cylinder liner 5 is fitted into the inner surface of each cylinder bore side wall 3, and a pair of substantially semi-cylindrical cylinder liners 5 surround the outside of the cylinder liner 5. A plate 4 is disposed integrally and fixedly within the cylinder bore side wall portion 3. As shown in FIG. 2, on the outside of the plate 4, a water jacket 6 for circulating cooling water is arranged so as to surround both sides 1a of the cylinder row of the cylinder bore 2. The cylinder block 1 is formed by Guicast casting,
As shown in FIG. 3, a strong magnet 8 is embedded and fixed in the mold 7 for forming the water jacket 6, so that the plate 4 will not shift from its predetermined position during casting. .
このようなエンジンのシリンダブロック構造にあっては
、プレート４を形成する鋳鉄は、アルミ合金よりも剛性
が高く、熱伝導率が低い。そのため、シリンダ列両側部
１ａの、シリンダ列方向と直交する方向に位置するシリ
ンダボア２の側壁部３はプレート４によって補強されて
剛性が向上され、シリンダボア２がシリンダ列方向に相
互に近接して配置されていることにより比較的に高剛性
とされるシリンダ列中央部１ｂとの剛性の均衡が保たれ
、変形しに（くなっている。そして、熱伝導率の低いプ
レート４によって冷却時における両側部１ａに位置する
シリンダボア側壁部３からの放熱が抑制され、冷却され
にくい中央部１ｂとの温度差が低減されるようになって
いる。したがって、高温時の冷却効果が良好となり、剛
性の高いシリンダ列中央部１ｂのシリンダ列と直交する
幅方向の熱膨張が、剛性が低くかつ過冷却されやすい両
側部１ａに影響を及ぼしてシリンダに歪変形を発生させ
るようなことは回避される。また、両側部１ａに位置す
るシリンダボア側壁部３から冷却損失として放出される
熱量が低減され、エンジンの熱効率が向上される。In such an engine cylinder block structure, the cast iron forming the plate 4 has higher rigidity and lower thermal conductivity than aluminum alloy. Therefore, the side wall portions 3 of the cylinder bores 2 located in the direction orthogonal to the cylinder row direction on both sides 1a of the cylinder row are reinforced by the plate 4 to improve rigidity, and the cylinder bores 2 are arranged close to each other in the cylinder row direction. As a result, the rigidity is maintained in balance with the center part 1b of the cylinder row, which is said to have relatively high rigidity, and is prevented from deforming. Heat dissipation from the cylinder bore side wall 3 located in the portion 1a is suppressed, and the temperature difference with the central portion 1b, which is difficult to cool, is reduced.Therefore, the cooling effect at high temperatures is good, and the cylinder bore has high rigidity. It is avoided that the thermal expansion in the width direction orthogonal to the cylinder row of the central portion 1b of the cylinder row affects the both side portions 1a, which have low rigidity and are prone to overcooling, and cause strain deformation in the cylinder. , the amount of heat released as cooling loss from the cylinder bore side wall portions 3 located on both sides 1a is reduced, and the thermal efficiency of the engine is improved.
−第１図は本発明のエンジンのシリンダブロック構造の
平面図、第２図は第１図におけるｎ−ｎ線断面図、第３
図はプレートを位置決めするための磁石がウォータジャ
ケットを形成するための金型内に埋め込み配置されてい
る状態を示す断面図である。
１−シリンダブロック、１ａ・−側部、２−・シリンダ
ボア、３−シリンダボア側壁部、４−プレート。
特許出願人 マ ツ ダ 株式会社代 理 人
弁理士 吉村勝俊（ばか１名）第１図
第２図- Fig. 1 is a plan view of the cylinder block structure of the engine of the present invention, Fig. 2 is a sectional view taken along the line nn in Fig. 1, and Fig. 3
The figure is a sectional view showing a state in which a magnet for positioning a plate is embedded in a mold for forming a water jacket. 1 - cylinder block, 1a - side part, 2 - cylinder bore, 3 - cylinder bore side wall part, 4 - plate. Patent applicant Mazda Co., Ltd. Agent Patent attorney Katsutoshi Yoshimura (one idiot) Figure 1 Figure 2
Claims (1)
において、 複数のシリンダボアをその配列方向に一体的に連結する
とともに、シリンダ列方向と直交する方向に位置するシ
リンダボア側壁部に、鋳鉄製のプレートを鋳込んだこと
を特徴とするエンジンのシリンダブロック構造。(1) In an engine cylinder block made of light alloy, a plurality of cylinder bores are integrally connected in the direction in which they are arranged, and a cast iron plate is attached to the side wall of the cylinder bore located in a direction perpendicular to the cylinder row direction. The engine cylinder block structure is characterized by being cast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10595187A JPS63272950A (en) | 1987-04-28 | 1987-04-28 | Cylinder block construction for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10595187A JPS63272950A (en) | 1987-04-28 | 1987-04-28 | Cylinder block construction for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63272950A true JPS63272950A (en) | 1988-11-10 |
Family
ID=14421138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10595187A Pending JPS63272950A (en) | 1987-04-28 | 1987-04-28 | Cylinder block construction for engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63272950A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5463989A (en) * | 1993-12-16 | 1995-11-07 | Saab Automobile Aktiebolag | Reinforced cylinder head |
| US6581550B2 (en) | 2000-06-30 | 2003-06-24 | Toyota Jidosha Kabushiki Kaisha | Cooling structure of cylinder block |
| US6834625B2 (en) | 2002-06-12 | 2004-12-28 | Toyota Jidosha Kabushiki Kaisha | Cooling apparatus of an internal combustion engine |
| US6874451B2 (en) | 2002-06-12 | 2005-04-05 | Toyota Jidosha Kabushiki Kaisha | Cooling apparatus of an internal combustion engine |
-
1987
- 1987-04-28 JP JP10595187A patent/JPS63272950A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5463989A (en) * | 1993-12-16 | 1995-11-07 | Saab Automobile Aktiebolag | Reinforced cylinder head |
| US6581550B2 (en) | 2000-06-30 | 2003-06-24 | Toyota Jidosha Kabushiki Kaisha | Cooling structure of cylinder block |
| US6834625B2 (en) | 2002-06-12 | 2004-12-28 | Toyota Jidosha Kabushiki Kaisha | Cooling apparatus of an internal combustion engine |
| US6874451B2 (en) | 2002-06-12 | 2005-04-05 | Toyota Jidosha Kabushiki Kaisha | Cooling apparatus of an internal combustion engine |
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