JP2005264892A - Cylinder block - Google Patents

Cylinder block Download PDF

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JP2005264892A
JP2005264892A JP2004082084A JP2004082084A JP2005264892A JP 2005264892 A JP2005264892 A JP 2005264892A JP 2004082084 A JP2004082084 A JP 2004082084A JP 2004082084 A JP2004082084 A JP 2004082084A JP 2005264892 A JP2005264892 A JP 2005264892A
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cylinder block
cooling water
bore
water passage
passage
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JP2004082084A
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Japanese (ja)
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Koji Fukushima
康二 福島
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Hino Motors Ltd
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Hino Motors Ltd
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Priority to JP2004082084A priority Critical patent/JP2005264892A/en
Publication of JP2005264892A publication Critical patent/JP2005264892A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a well-productive cylinder block with a bore-to-bore portion having reduced thermal load. <P>SOLUTION: A recessed portion 8 recessed to the center side of the cylinder block is formed in the immersion face of a water jacket 2 on the side of an exhaust valve in the bore-to-bore portion 1 during casting, and a cooling water passage 9 extending upward from the recessed portion 8 and passing through the upper face of the cylinder block is drilled by applying a drill to the bore-to-bore portion 1 at its top. An additional cooling water passage 10 extending upward from an intermediate portion of the cooling water passage 9 and passing through the upper face of the cylinder block is drilled by applying the drill to the bore-to-bore portion 1 at its top. The upper ends of the cooling water passages 9, 10 range to the water jacket formed in the cylinder head. Cooling water in the water jacket 2 flows from the recessed portion 8 into the cooling water passages 9, 10 to efficiently cool the bore-to-bore portion 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明はシリンダブロックに関するものである。   The present invention relates to a cylinder block.

内燃機関のシリンダブロックでは、その内部に形成したウォータジャケットに冷却水を流し、シリンダ近傍部分を冷やしている(例えば、非特許文献1参照)。   In a cylinder block of an internal combustion engine, cooling water is allowed to flow through a water jacket formed inside the cylinder block to cool the vicinity of the cylinder (for example, see Non-Patent Document 1).

図3は従来のシリンダブロックの一例を示すもので、1はボア間部位、2は排気弁側のウォータジャケット、3は吸気弁側のウォータジャケット、4はボルト穴、5,6は側壁開口を表している。
シリンダブロックの上部には、給排気系、動弁系、並びに燃料噴射系などの部品が付帯したシリンダヘッド(図示せず)が載置され、当該シリンダヘッドは、ボルト穴4に螺合するヘッドボルトによりシリンダブロックに締結されている。
FIG. 3 shows an example of a conventional cylinder block, where 1 is an area between bores, 2 is a water jacket on the exhaust valve side, 3 is a water jacket on the intake valve side, 4 is a bolt hole, and 5 and 6 are side wall openings. Represents.
A cylinder head (not shown) with components such as an air supply / exhaust system, a valve operating system, and a fuel injection system is placed on the upper part of the cylinder block. The cylinder head is screwed into the bolt hole 4. It is fastened to the cylinder block by bolts.

更に、上記のウォータジャケット2,3とは別途に、シリンダヘッドの内部に形成してあるウォータジャケットにも冷却水を流し、シリンダヘッド燃焼面や排気経路近傍部分を冷やすようにしている。
また、ボア間部位1の熱負荷を減らすために、ボア間部位1を水平に貫通してウォータジャケット2,3を結ぶ冷却水通路7を設けたものもある(例えば、特許文献1参照)。
実願昭57−201551号(実開昭59−100946号)のマイクロフィルム GP企画センター、「自動車のメカはどうなっているか エンジン系」、株式会社グランプリ出版、2003年2月28日第15刷発行、p44−46
Further, separately from the water jackets 2 and 3 described above, cooling water is also supplied to the water jacket formed inside the cylinder head so as to cool the cylinder head combustion surface and the vicinity of the exhaust path.
Moreover, in order to reduce the thermal load of the part 1 between bores, there also exists what provided the cooling water channel | path 7 which penetrates the part 1 between bores horizontally, and connects the water jackets 2 and 3 (for example, refer patent document 1).
Microfilm of Japanese Utility Model No. 57-201551 (Japanese Utility Model Application Publication No. 59-1000094) GP Planning Center, “How is the mechanism of automobiles? Engine system”, Grand Prix Publishing Co., Ltd., February 28, 2003, 15th edition, p. 44-46

ところが特許文献1のシリンダブロックでは、平面的に見た冷却水通路7の貫通方向をエンジン軸心に斜めに設定し、冷却水通路7とボルト穴4との干渉を回避しているので、冷却水通路7が長くなる傾向を呈し、冷却水通路7をドリルで穿設する場合は、ドリルの折損が発生しやすく、生産性が良いとはいえない。   However, in the cylinder block of Patent Document 1, since the penetration direction of the cooling water passage 7 in a plan view is set obliquely about the engine axis and the interference between the cooling water passage 7 and the bolt hole 4 is avoided, When the water passage 7 tends to be long and the cooling water passage 7 is drilled with a drill, the drill is likely to break, and the productivity cannot be said to be good.

また、冷却水通路7を穿設するのにあたっては、側壁開口5,6の一方からボア間部位1にドリルを当てることになるため、冷却水通路7の位置をシリンダブロック上面の近くに設定できず、ボア間部位1の上端寄り箇所、つまり、燃焼室温度に対応して高温になる部分を効率よく冷やせなかった。   Further, when drilling the cooling water passage 7, since the drill is applied to the part 1 between the bores from one of the side wall openings 5 and 6, the position of the cooling water passage 7 can be set close to the upper surface of the cylinder block. Therefore, the part near the upper end of the part 1 between the bores, that is, the part having a high temperature corresponding to the combustion chamber temperature could not be efficiently cooled.

更に、シリンダブロックの鋳造時に冷却水通路7を鋳抜き孔として形成させる場合は、ボア間部位1のシリンダ配列方向の厚みを充分にとる必要があり、その結果、エンジンの全長が延びることになる。   Further, when the cooling water passage 7 is formed as a cast hole during the casting of the cylinder block, it is necessary to take a sufficient thickness in the cylinder arrangement direction of the portion 1 between the bores. As a result, the overall length of the engine is extended. .

本発明は上述した実情に鑑みてなしたもので、生産性がよく且つボア間部位の熱負荷を減らせるシリンダブロックを提供することを目的としている。   The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a cylinder block that has good productivity and can reduce the thermal load on the portion between the bores.

上記目的を達成するため、請求項1に記載の発明は、ボア間部位のウォータジャケット浸漬面にシリンダブロック中心側へ窪む凹陥部を形成し、該凹陥部から上向きに延びてシリンダブロック上面へ貫通し且つシリンダヘッド内部のウォータジャケットに連なる冷却水通路を穿設している。   In order to achieve the above object, according to the first aspect of the present invention, a recessed portion that is recessed toward the center of the cylinder block is formed on the water jacket immersion surface of the portion between the bores, and extends upward from the recessed portion to the upper surface of the cylinder block. A cooling water passage that penetrates and continues to the water jacket inside the cylinder head is formed.

請求項2に記載の発明は、ボア間部位のウォータジャケット浸漬面からシリンダブロック中心側へ向けて横向きに延びる取水通路を穿設し、該取水通路から上向きに延びてシリンダブロック上面へ貫通し且つシリンダヘッド内部のウォータジャケットに連なる冷却水通路を穿設している。   According to a second aspect of the present invention, there is provided a water intake passage extending laterally from the water jacket immersion surface of the portion between the bores toward the center of the cylinder block, extending upward from the water intake passage and penetrating to the upper surface of the cylinder block; A cooling water passage that continues to the water jacket inside the cylinder head is formed.

請求項3に記載の発明は、冷却水通路から上向きに延びてシリンダブロック上面へ貫通し且つシリンダヘッド内部のウォータジャケットに連なる追加の冷却水通路を穿設している。   According to a third aspect of the present invention, an additional cooling water passage extending upward from the cooling water passage and penetrating to the upper surface of the cylinder block and continuing to the water jacket inside the cylinder head is formed.

請求項1に記載の発明においては、ボア間部位側方にあるウォータジャケットの冷却水を、凹陥部からボア間部位内方を上向きに延びる冷却水通路へ流す。
請求項2に記載の発明においては、ボア間部位側方にあるウォータジャケットの冷却水を、取水通路からボア間部位内方を上向きに延びる冷却水通路へ流す。
請求項3に記載の発明においては、冷却水の一部を追加の冷却水通路へ流す。
In the first aspect of the present invention, the cooling water in the water jacket located on the side of the inter-bore region is allowed to flow into the cooling water passage extending upward from the recessed portion toward the inside of the inter-bore region.
In the second aspect of the present invention, the cooling water in the water jacket located on the side of the inter-bore region is allowed to flow from the intake passage to the cooling water passage extending upward inward of the inter-bore region.
In invention of Claim 3, a part of cooling water is poured into an additional cooling water channel | path.

本発明のシリンダブロックによれば、下記のような優れた効果を奏し得る。   According to the cylinder block of the present invention, the following excellent effects can be obtained.

(1)請求項1乃至請求項3に記載の発明はそのいずれもが、ボア間部位内方を上向きに延びる冷却水通路に冷却水を流すので、燃焼室温度に対応して高温になるボア間部位の上端寄り箇所の熱負荷が減り、エンジン出力を高めることができる。   (1) In any of the first to third aspects of the present invention, since the cooling water flows through the cooling water passage extending upward inwardly between the bores, the bore becomes a high temperature corresponding to the combustion chamber temperature. The heat load near the upper end of the intermediate part is reduced, and the engine output can be increased.

(2)請求項1に記載の発明では、凹陥部を形成した分だけ、冷却水通路の穿設距離が短くなるので、穿孔加工が容易で且つドリルの折損も発生しにくく、生産効率が向上してコストの低減を図ることができる。   (2) In the invention described in claim 1, since the drilling distance of the cooling water passage is shortened by the amount of the concave portion formed, the drilling process is easy and the drill is not easily broken, and the production efficiency is improved. Thus, cost can be reduced.

(3)請求項2に記載の発明では、取水通路を穿設した分だけ、冷却水通路の穿設距離が短くなり、また、取水通路の穿設距離も元々短いので、穿孔加工が容易で且つドリルの折損も発生しにくく、生産効率が向上してコストの低減を図ることができる。   (3) In the invention according to claim 2, the drilling distance of the cooling water passage is shortened by the amount of the drilling passage, and the drilling distance of the intake passage is originally short, so that the drilling process is easy. In addition, breakage of the drill hardly occurs, production efficiency can be improved, and cost can be reduced.

(4)請求項3に記載の発明では、追加の冷却水通路の穿設距離が短いので、穿孔加工が容易で且つドリルの折損も発生しにくく、生産効率が向上してコストの低減を図ることができる。   (4) In the invention described in claim 3, since the drilling distance of the additional cooling water passage is short, drilling is easy and the drill is not easily broken, and the production efficiency is improved and the cost is reduced. be able to.

以下、本発明の実施の形態を図面に基づき説明する。
図1は本発明のシリンダブロックの実施の形態の第1の例を示すもので、図中、図3と同一の符号を付した部分は同一物を表している。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a first example of an embodiment of a cylinder block according to the present invention. In the figure, the same reference numerals as those in FIG. 3 denote the same parts.

このシリンダブロックでは、ボア間部位1の排気弁側のウォータジャケット2浸漬面にシリンダブロック中心側へ窪む凹陥部8を鋳造時に形成しておき、該凹陥部8から上向き斜めに延びてシリンダブロック上面へ貫通する冷却水通路9を、ボア間部位1の頂部からドリルを当てて穿設している。
更に、冷却水通路9の中間部から上向き斜めに延びてシリンダブロック上面へ貫通する追加の冷却水通路10を、ボア間部位1の頂部からドリルを当てて穿設している。
In this cylinder block, a recessed portion 8 that is recessed toward the center of the cylinder block is formed on the immersion surface of the water jacket 2 on the exhaust valve side of the portion 1 between the bores, and the cylinder block extends obliquely upward from the recessed portion 8. A cooling water passage 9 penetrating to the upper surface is formed by applying a drill from the top of the portion 1 between the bores.
Further, an additional cooling water passage 10 extending obliquely upward from the middle portion of the cooling water passage 9 and penetrating to the upper surface of the cylinder block is drilled from the top of the portion 1 between the bores.

これら冷却水通路9,10の上端は、シリンダヘッド(図示せず)内部に形成してあるウォータジャケットに連なっており、ウォータジャケット2の冷却水が凹陥部8からボア間部位1内方の冷却水通路9,10へ流れる。
よって、燃焼室温度に対応して高温になるボア間部位1の上端寄り箇所が効率よく冷却され、エンジン出力を高めることが可能になる。
The upper ends of the cooling water passages 9 and 10 are connected to a water jacket formed inside a cylinder head (not shown), and the cooling water in the water jacket 2 is cooled from the recessed portion 8 to the inside of the portion 1 between the bores. It flows to the water passages 9 and 10.
Therefore, the part near the upper end of the part 1 between the bores that becomes high temperature corresponding to the combustion chamber temperature is efficiently cooled, and the engine output can be increased.

また、凹陥部8の分だけ冷却水通路9の穿設距離が短くなり、追加の冷却水通路10は冷却水通路9に比べると穿設距離が短いので、穿孔加工が容易で且つドリルの折損も発生しにくくなる。   Further, the drilling distance of the cooling water passage 9 is shortened by the amount of the recessed portion 8, and the additional cooling water passage 10 has a shorter drilling distance than the cooling water passage 9, so that the drilling process is easy and the drill breaks. Is less likely to occur.

図2は本発明のシリンダブロックの実施の形態の第2の例を示すもので、図中、図1と同一の符号を付した部分は同一物を表している。   FIG. 2 shows a second example of the embodiment of the cylinder block according to the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same parts.

このシリンダブロックでは、ボア間部位1の排気弁側のウォータジャケット2浸漬面に側壁開口5よりドリルを当てて、シリンダブロック中心側へ向けて横向きに延びる短尺の取水通路11を穿設し、該取水通路11から上向き斜めに延びてシリンダブロック上面へ貫通する冷却水通路9を、ボア間部位1の頂部からドリルを当てて穿設している。
更に、冷却水通路9の中間部から上向きに延びてシリンダブロック上面へ貫通する追加の冷却水通路10を、ボア間部位1の頂部からドリルを当てて穿設している。
In this cylinder block, a drill is applied from the side wall opening 5 to the immersion surface of the water jacket 2 on the exhaust valve side of the portion 1 between the bores, and a short intake passage 11 extending laterally toward the center side of the cylinder block is formed, A cooling water passage 9 extending obliquely upward from the water intake passage 11 and penetrating to the upper surface of the cylinder block is formed by applying a drill from the top of the portion 1 between the bores.
Further, an additional cooling water passage 10 extending upward from an intermediate portion of the cooling water passage 9 and penetrating to the upper surface of the cylinder block is drilled from the top of the portion 1 between the bores.

これにより、ウォータジャケット2の冷却水が取水通路11を経てボア間部位1内方の冷却水通路9,10へ流れる。
よって、燃焼室温度に対応して高温になるボア間部位1の上端寄り箇所が効率よく冷却され、エンジン出力を高めることが可能になる。
Thereby, the cooling water of the water jacket 2 flows through the intake passage 11 to the cooling water passages 9 and 10 inside the bore portion 1.
Therefore, the part near the upper end of the part 1 between the bores that becomes high temperature corresponding to the combustion chamber temperature is efficiently cooled, and the engine output can be increased.

また、取水通路11の分だけ冷却水通路9の穿設距離が短くなり、取水通路11の穿設距離も元々短く、追加の冷却水通路10は冷却水通路9に比べると穿設距離が短いので、穿孔加工が容易で且つドリルの折損も発生しにくくなる。   Further, the drilling distance of the cooling water passage 9 is shortened by the intake water passage 11, the drilling distance of the intake water passage 11 is originally short, and the additional cooling water passage 10 is shorter than the cooling water passage 9. Therefore, drilling is easy and drill breakage is less likely to occur.

なお、本発明のシリンダブロックは上述した実施の形態のみに限定されるものではなく、冷却水通路の数を増減すること、その他、本発明の要旨を逸脱しない範囲において変更を加え得ることは勿論である。   It should be noted that the cylinder block of the present invention is not limited to the embodiment described above, and it goes without saying that the number of cooling water passages can be increased or decreased and other modifications can be made without departing from the scope of the present invention. It is.

本発明のシリンダブロックは、輸送機器、産業機器、発電機器などに組み込む内燃機関に適用できる。   The cylinder block of the present invention can be applied to an internal combustion engine incorporated in transportation equipment, industrial equipment, power generation equipment, and the like.

本発明のシリンダブロックの実施の形態の第1の例を示す横断面図である。It is a cross-sectional view which shows the 1st example of embodiment of the cylinder block of this invention. 本発明のシリンダブロックの実施の形態の第2の例を示す横断面図である。It is a cross-sectional view which shows the 2nd example of embodiment of the cylinder block of this invention. 従来のシリンダブロックの一例を示す横断面図である。It is a cross-sectional view showing an example of a conventional cylinder block.

符号の説明Explanation of symbols

1 ボア間部位
2 ウォータジャケット
8 凹陥部
9 冷却水通路
10 冷却水通路
11 取水通路
1 Bore area 2 Water jacket 8 Recess 9 Cooling water passage 10 Cooling water passage 11 Water intake passage

Claims (3)

ボア間部位のウォータジャケット浸漬面にシリンダブロック中心側へ窪む凹陥部を形成し、該凹陥部から上向きに延びてシリンダブロック上面へ貫通し且つシリンダヘッド内部のウォータジャケットに連なる冷却水通路を穿設したことを特徴とするシリンダブロック。   A concave portion that is recessed toward the center of the cylinder block is formed on the water jacket immersion surface between the bores, and a cooling water passage that extends upward from the concave portion and penetrates to the upper surface of the cylinder block and continues to the water jacket inside the cylinder head is formed. Cylinder block characterized by having been installed. ボア間部位のウォータジャケット浸漬面からシリンダブロック中心側へ向けて横向きに延びる取水通路を穿設し、該取水通路から上向きに延びてシリンダブロック上面へ貫通し且つシリンダヘッド内部のウォータジャケットに連なる冷却水通路を穿設したことを特徴とするシリンダブロック。   A water intake passage extending laterally from the water jacket immersion surface between the bores toward the center of the cylinder block is drilled, extending upward from the water intake passage and penetrating to the upper surface of the cylinder block and continuing to the water jacket inside the cylinder head. A cylinder block having a water passage. 冷却水通路から上向きに延びてシリンダブロック上面へ貫通し且つシリンダヘッド内部のウォータジャケットに連なる追加の冷却水通路を穿設した請求項1あるいは請求項2のいずれかに記載のシリンダブロック。   3. The cylinder block according to claim 1, further comprising an additional cooling water passage extending upward from the cooling water passage and penetrating to the upper surface of the cylinder block and continuing to a water jacket inside the cylinder head.
JP2004082084A 2004-03-22 2004-03-22 Cylinder block Pending JP2005264892A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014190299A (en) * 2013-03-28 2014-10-06 Kubota Corp Inter cylinder bore cooling device of multi-cylinder water-cooled engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014190299A (en) * 2013-03-28 2014-10-06 Kubota Corp Inter cylinder bore cooling device of multi-cylinder water-cooled engine

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