JP2000170603A - Cylinder block high rigidity structure - Google Patents
Cylinder block high rigidity structureInfo
- Publication number
- JP2000170603A JP2000170603A JP10351266A JP35126698A JP2000170603A JP 2000170603 A JP2000170603 A JP 2000170603A JP 10351266 A JP10351266 A JP 10351266A JP 35126698 A JP35126698 A JP 35126698A JP 2000170603 A JP2000170603 A JP 2000170603A
- Authority
- JP
- Japan
- Prior art keywords
- main bearing
- rigidity
- cylinder block
- partition
- thickness
- 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
- 238000005192 partition Methods 0.000 claims abstract description 269
- 239000000463 material Substances 0.000 claims description 50
- 238000005266 casting Methods 0.000 claims description 41
- 230000013011 mating Effects 0.000 claims description 26
- 239000000470 constituent Substances 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 abstract description 30
- 230000000452 restraining effect Effects 0.000 abstract 2
- 239000013585 weight reducing agent Substances 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 230000000994 depressogenic effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、シリンダブロック
の軽量化に伴う剛性の低下を防止できる、シリンダブロ
ック高剛性構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a highly rigid structure for a cylinder block, which can prevent a reduction in rigidity due to a reduction in the weight of the cylinder block.
【0002】[0002]
【従来の技術】自動車の燃費向上、生産コスト低減等の
ため、エンジンのシリンダブロックの軽量化が盛んに研
究されており、軽量化の一手段として、シリンダブロッ
クを構成する壁の薄肉化が図られている。2. Description of the Related Art In order to improve the fuel efficiency of automobiles and to reduce production costs, the weight of engine cylinder blocks has been actively studied. One way to reduce the weight is to reduce the wall thickness of the cylinder blocks. Have been.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、壁をむ
やみに薄肉化すると、機械的荷重に対するシリンダブロ
ックの剛性が低下し、そのために、運転中にシリンダブ
ロックが変形して、エンジンの停止、振動の増大、損傷
といった問題の生じる恐れがあった。特に、主軸受キャ
ップの上下方向の変形、主軸受キャップのクランク軸方
向の変形、操縦側と非操縦側との上下変形量の差に因っ
てシリンダブロックが操縦側に凸となる変形等が、目立
っていた。However, if the wall is thinned unnecessarily, the rigidity of the cylinder block with respect to the mechanical load is reduced, and as a result, the cylinder block is deformed during operation, causing the engine to stop and vibrate. Problems such as increase and damage may occur. In particular, deformation of the main bearing cap in the vertical direction, deformation of the main bearing cap in the crankshaft direction, deformation of the cylinder block protruding to the control side due to the difference in the amount of vertical deformation between the control side and the non-control side, etc. Was outstanding.
【0004】本発明は、軽量化に伴う剛性低下を抑制で
き、シリンダブロックの種々の変形を抑制できる、シリ
ンダブロック高剛性構造を提供することを目的とする。An object of the present invention is to provide a cylinder block high rigidity structure capable of suppressing a reduction in rigidity due to weight reduction and suppressing various deformations of the cylinder block.
【0005】[0005]
【課題を解決するための手段】請求項1記載の発明は、
シリンダブロックにおいて、次の(1)〜(3)の構造の内の
少なくとも2つを採用したことを特徴とするシリンダブ
ロック高剛性構造。 (1)主軸受回りの上部隔壁の内、少なくとも主軸受ボル
トボス部の剛性を、主軸受回りの上部隔壁の内の他の隔
壁に比して高めた。 (2)主軸受回りの隔壁の内、主軸受キャップ合わせ面か
らオイルパン合わせ面にかけての隔壁の剛性を、主軸受
回りの隔壁の内の他の隔壁に比して高めた。 (3)シリンダ部の操縦側の剛性を高めて、カム室及びそ
れを支持するリブを備えたシリンダ部の非操縦側の剛性
と同等とした。According to the first aspect of the present invention,
A high rigidity structure of a cylinder block, wherein at least two of the following structures (1) to (3) are adopted in the cylinder block. (1) The rigidity of at least the main bearing bolt boss portion of the upper partition wall around the main bearing is increased as compared with the other partition walls of the upper partition wall around the main bearing. (2) Among the bulkheads around the main bearing, the rigidity of the bulkhead from the mating surface of the main bearing cap to the mating surface of the oil pan is increased as compared with other bulkheads around the main bearing. (3) The rigidity on the control side of the cylinder is increased to be equal to the rigidity on the non-control side of the cylinder provided with the cam chamber and the rib supporting the cam chamber.
【0006】まず、シリンダブロックにおいては、図1
における矢印に示すような下向きの機械的荷重がクラン
ク軸1から主軸受キャップに加わるため、図2における
矢印に示すように、主軸受キャップ2に上下方向の変形
が生じる。そこで、この変形と主軸受3回りの上部隔壁
との関係を調べた。即ち、主軸受3回りの上部隔壁を、
図2に示すように、外側隔壁A、主軸受ボルトボス部
B、内側隔壁Cの3つの領域に分割し、各領域のみで主
軸受キャップ2を支持した場合における主軸受キャップ
2の上下方向変形量とジャーナル楕円変形比を求めた。
それによると、3つの場合を比較して両者が満足できる
低値であるのは、主軸受ボルトボス部Bのみで支持した
場合であった。即ち、3つの隔壁領域A,B,Cの内、
主軸受キャップ2の上下方向の変形に最も影響する隔壁
領域は主軸受ボルトボス部Bであることがわかった。従
って、請求項1記載の発明において、構造(1)を採用し
て、主軸受ボルトボス部Bの剛性を他の隔壁A,Cに比
して高めた場合には、主軸受キャップ2の上下方向の変
形が最も効果的に抑制される。なお、ジャーナル楕円変
形比は、次式で求めた。式中のh,vは図2に示す。 ジャーナル楕円変形比=(|水平方向成分h|+|垂直
方向成分v|)/ジャーナル径First, in the cylinder block, FIG.
2, a downward mechanical load is applied from the crankshaft 1 to the main bearing cap, so that the main bearing cap 2 is vertically deformed as shown by the arrow in FIG. Therefore, the relationship between this deformation and the upper partition around the main bearing 3 was examined. That is, the upper partition around the main bearing 3 is
As shown in FIG. 2, the vertical deformation amount of the main bearing cap 2 when the main bearing cap 2 is divided into three regions of the outer partition wall A, the main bearing bolt boss portion B, and the inner partition wall C, and the main bearing cap 2 is supported only in each region. And the journal elliptical deformation ratio were determined.
According to the results, the lower value satisfying both in comparison with the three cases was a case where the main bearing bolt boss B supported only. That is, of the three partition areas A, B, and C,
It was found that the partition wall region that most affected the vertical deformation of the main bearing cap 2 was the main bearing bolt boss portion B. Therefore, when the structure (1) is adopted and the rigidity of the main bearing bolt boss portion B is increased in comparison with the other partition walls A and C in the first aspect of the present invention, the vertical direction of the main bearing cap 2 is increased. Is most effectively suppressed. The journal elliptic deformation ratio was determined by the following equation. H and v in the equation are shown in FIG. Journal elliptical deformation ratio = (| horizontal component h | + | vertical component v |) / journal diameter
【0007】また、シリンダブロックにおいては、図3
における矢印に示すようなクランク軸方向(図3の左右
方向)の機械的荷重がクランク軸1から主軸受キャップ
に加わるため、図4におけるX部分即ち主軸受3の周辺
部が奥(図4の紙面裏面側)へ凹むような変形即ち主軸
受キャップ2のクランク軸方向(図4の紙面に垂直な方
向)の変形が生じる。そこで、図5に示すように、主軸
受3回りの上部隔壁の内、主軸受キャップ2の上下方向
の変形に最も影響する隔壁領域である主軸受ボルトボス
部Bのみで主軸受キャップ2を支持した状態において、
主軸受キャップ2のクランク軸方向の変形と主軸受3回
りのリブ構造との関係を調べた。即ち、上向きリブD、
水平リブE、下向きリブFの3つのリブをそれぞれ設
け、リブを設けない場合、上向きリブDを設けた場合、
水平リブEを設けた場合、下向きリブFを設けた場合に
おける主軸受キャップ2のクランク軸方向変形量を求め
た。それによると、下向きリブFを設けた場合が最も低
値であった。即ち、主軸受キャップ2のクランク軸方向
の変形に最も影響するリブ構造は下向きリブFであるこ
とがわかった。従って、請求項1記載の発明において、
構造(2)を採用して、主軸受3回りの隔壁の内、主軸受
キャップ合わせ面からオイルパン合わせ面にかけての隔
壁の剛性、即ち下向きリブFに相当する部分を含んだ隔
壁の剛性を、前記隔壁の内の他の隔壁に比して高めた場
合には、主軸受キャップ2のクランク軸方向の変形が効
果的に抑制される。In the cylinder block, FIG.
4 applies a mechanical load in the crankshaft direction (left-right direction in FIG. 3) from the crankshaft 1 to the main bearing cap. The main bearing cap 2 is deformed in the crankshaft direction (a direction perpendicular to the paper surface of FIG. 4) so as to be depressed toward the rear surface of the paper. Therefore, as shown in FIG. 5, the main bearing cap 2 is supported only by the main bearing bolt boss portion B, which is the partition region that most affects the vertical deformation of the main bearing cap 2 among the upper partition around the main bearing 3. In the state
The relationship between the deformation of the main bearing cap 2 in the crankshaft direction and the rib structure around the main bearing 3 was examined. That is, the upward rib D,
When three ribs, a horizontal rib E and a downward rib F, are provided, and no rib is provided, and when an upward rib D is provided,
The amount of deformation of the main bearing cap 2 in the crankshaft direction when the horizontal rib E was provided and when the downward rib F was provided was determined. The lowest value was obtained when the downward rib F was provided. That is, it was found that the rib structure that most affected the deformation of the main bearing cap 2 in the crankshaft direction was the downward rib F. Therefore, in the invention of claim 1,
By adopting the structure (2), the rigidity of the partition wall from the mating surface of the main bearing cap to the mating surface of the oil pan, that is, the rigidity of the partition wall including a portion corresponding to the downward rib F, among the partition walls around the main bearing 3, When the height is increased as compared with the other partition walls, the deformation of the main bearing cap 2 in the crankshaft direction is effectively suppressed.
【0008】更に、シリンダブロックの各部において
は、加わる機械的荷重によって図6における矢印方向に
変形が生じる。そして、カム室81及びそれを支持する
リブ82が設けられているシリンダ部62の非操縦側の
剛性がシリンダ部62の操縦側の剛性より高いため、操
縦側の上下変形量が非操縦側より大きくなってシリンダ
ブロックが操縦側に凸となる変形が生じる。このこと
は、シリンダブロックの操縦側に凸となる変形と非操縦
側のカム室81及びリブ82との関係を調べたところ、
明らかであった。即ち、カム室81及びリブ82が共に
無い場合、カム室81は有るがリブ82が無い場合、カ
ム室81及びリブ82が共に有る場合の3つの場合につ
いて、操縦側と非操縦側との上下変形量の差を求めたと
ころ、3つの場合を比較して前記差が最小であるのは、
カム室81及びリブ82が共に無い場合であった。これ
は、シリンダブロックの操縦側に凸となる変形に対して
は、非操縦側のカム室81及びリブ82が大きく影響し
ていることを示している。ところで、カム室81及びリ
ブ82を共に無くすことは不可能である。そこで、シリ
ンダ部62の操縦側の剛性を、カム室81及びリブ82
が設けられているシリンダ部62の非操縦側の剛性と同
等とすることを考えた。従って、請求項1記載の発明に
おいて、構造(3)を採用して、シリンダ部62の操縦側
の剛性を高めてシリンダ部62の非操縦側の剛性と同等
とした場合には、操縦側の上下変形量と非操縦側の上下
変形量とが同等となり、シリンダブロックの操縦側に凸
となる変形が効果的に抑制される。Further, each part of the cylinder block is deformed in the direction of the arrow in FIG. 6 by the applied mechanical load. Since the rigidity on the non-steering side of the cylinder portion 62 provided with the cam chamber 81 and the rib 82 supporting the cam chamber 81 is higher than the rigidity on the steering side of the cylinder portion 62, the amount of vertical deformation on the steering side is greater than that on the non-steering side. As the cylinder block becomes larger, a deformation occurs in which the cylinder block becomes convex on the steering side. This was confirmed by examining the relationship between the deformation of the cylinder block that became convex on the control side and the cam chamber 81 and rib 82 on the non-control side.
It was clear. That is, in the three cases where the cam chamber 81 and the rib 82 are not provided, the case where the cam chamber 81 is provided but the rib 82 is not provided, and the case where the cam chamber 81 and the rib 82 are provided together, When the difference in the amount of deformation was determined, the difference between the three cases was the smallest,
This is the case where neither the cam chamber 81 nor the rib 82 is provided. This indicates that the cam chamber 81 and the rib 82 on the non-steering side have a great influence on the deformation of the cylinder block that is convex on the steering side. By the way, it is impossible to eliminate both the cam chamber 81 and the rib 82. Therefore, the rigidity of the cylinder portion 62 on the control side is reduced by the cam chamber 81 and the rib 82.
Is considered to be equivalent to the rigidity on the non-steering side of the cylinder portion 62 provided with. Therefore, in the first aspect of the present invention, when the structure (3) is adopted to increase the rigidity of the cylinder portion 62 on the control side to be equal to the rigidity of the cylinder portion 62 on the non-control side, The vertical deformation amount is equal to the vertical deformation amount on the non-steering side, and the deformation of the cylinder block that is convex on the steering side is effectively suppressed.
【0009】以上のように、請求項1記載の発明におい
ては、構造(1)〜(3)の内の少なくとも2つを採用するの
で、主軸受キャップ2の上下方向の変形、主軸受キャッ
プ2のクランク軸方向の変形、シリンダブロックが操縦
側に凸となる変形の内の少なくとも2つが効果的に抑制
される。As described above, in the first aspect of the present invention, since at least two of the structures (1) to (3) are employed, the deformation of the main bearing cap 2 in the vertical direction, At least two of the deformation in the crankshaft direction and the deformation in which the cylinder block is convex on the steering side are effectively suppressed.
【0010】請求項2記載の発明は、請求項1記載の発
明において、前記構造(1)を採用した場合において、主
軸受回りで主軸受ボルトボス部の外側の隔壁の内、ロア
デッキから主軸受キャップ合わせ面にかけての隔壁の剛
性を、前記外側の隔壁の内の他の隔壁に比して高めたも
のである。According to a second aspect of the present invention, in the first aspect of the present invention, when the structure (1) is employed, the main bearing cap is disposed between the lower deck and the lower deck around the main bearing and outside the main bearing bolt boss portion. The rigidity of the partition wall over the mating surface is increased as compared with the other partition walls of the outer partition wall.
【0011】主軸受キャップ2の上下方向の変形と主軸
受3回りのリブ構造との関係を調べた。即ち、図7に示
すように、主軸受ボルトボス部Bのみで主軸受キャップ
2を支持した状態で、上向きリブD、水平リブE、下向
きリブFの3つのリブをそれぞれ設け、リブを設けない
場合、上向きリブDを設けた場合、水平リブEを設けた
場合、下向きリブFを設けた場合における主軸受キャッ
プ2の上下方向変形量とジャーナル楕円変形比を求め
た。それによると、4つの場合を比較して両者が満足で
きる低値であるのは、上向きリブDを設けた場合であっ
た。即ち、主軸受キャップ2の上下方向の変形に最も影
響するリブ構造は上向きリブDであることがわかった。
これに基づき、請求項2記載の発明では、主軸受3回り
で主軸受ボルトボス部Bの外側の隔壁の内、ロアデッキ
から主軸受キャップ合わせ面にかけての隔壁、即ち上向
きリブDに相当する部分を含んだ隔壁の剛性を、前記外
側の隔壁の内の他の隔壁に比して高めたので、主軸受キ
ャップ2の上下方向の変形が更に効果的に抑制される。The relationship between the vertical deformation of the main bearing cap 2 and the rib structure around the main bearing 3 was examined. That is, as shown in FIG. 7, in a state where the main bearing cap 2 is supported only by the main bearing bolt boss B, three ribs of the upward rib D, the horizontal rib E, and the downward rib F are provided, and no rib is provided. The vertical deformation amount and the journal elliptical deformation ratio of the main bearing cap 2 when the upward rib D was provided, when the horizontal rib E was provided, and when the downward rib F was provided were obtained. According to the results, the case where the upward rib D is provided is a low value that can satisfy both of the four cases. That is, it was found that the rib structure that most affected the vertical deformation of the main bearing cap 2 was the upward rib D.
On the basis of this, the invention according to claim 2 includes a partition from the lower deck to the main bearing cap mating surface, that is, a portion corresponding to the upward rib D, of the partition around the main bearing 3 and outside the main bearing bolt boss portion B. Since the rigidity of the partition wall is increased as compared with the other partition walls of the outer partition wall, the deformation of the main bearing cap 2 in the vertical direction is more effectively suppressed.
【0012】請求項3記載の発明は、請求項1記載の発
明において、前記構造(1)を採用した場合において、主
軸受回りで主軸受ボルトボス部の外側の隔壁の内、ロア
デッキから主軸受キャップ合わせ面にかけての隔壁であ
って、主軸受キャップ合わせ面から上向き45度以上の
隔壁の剛性を、前記外側の隔壁の内の他の隔壁に比して
高めたものである。According to a third aspect of the present invention, in the first aspect of the present invention, when the structure (1) is employed, the main bearing cap is disposed between the lower deck and the lower deck around the main bearing and outside the main bearing bolt boss portion. The partition wall extending over the mating surface, wherein the rigidity of the partition wall upward by 45 degrees or more from the main bearing cap mating surface is increased as compared with the other partition walls among the outer partition walls.
【0013】請求項3記載の発明においても、上向きリ
ブDに実質的に相当する箇所の隔壁の剛性が高められて
いるので、請求項2記載の発明と同様に、主軸受キャッ
プ2の上下方向の変形が更に効果的に抑制される。しか
も、剛性を高める隔壁の領域が請求項2の場合より小さ
いので、肉厚を調節して剛性を高める場合には厚肉化す
る隔壁の領域が請求項2の場合より小さくなり、それ故
に、請求項2の場合より軽量化が図られる。Also in the third aspect of the invention, the rigidity of the partition wall substantially corresponding to the upward rib D is increased, so that the vertical direction of the main bearing cap 2 is the same as in the second aspect of the invention. Is more effectively suppressed. Moreover, since the area of the partition wall for increasing the rigidity is smaller than that of the second aspect, when the thickness is adjusted to increase the rigidity, the area of the partition wall to be thickened is smaller than that of the second aspect. Weight reduction is achieved compared to the case of claim 2.
【0014】請求項4記載の発明は、請求項1記載の発
明において、前記構造(3)を採用した場合において、シ
リンダ部の操縦側の外壁に、トップデッキからスカート
部上部に至る上下方向のリブを設け、これによって剛性
を高めたものである。According to a fourth aspect of the present invention, in the first aspect of the invention, when the structure (3) is adopted, the vertical wall extending from the top deck to the upper part of the skirt portion is provided on the outer wall on the steering side of the cylinder portion. Ribs are provided to increase rigidity.
【0015】請求項4記載の発明においては、リブによ
って剛性が高められるので、製造作業が容易である。According to the fourth aspect of the invention, the rigidity is enhanced by the ribs, so that the manufacturing operation is easy.
【0016】請求項5記載の発明は、請求項1記載の発
明において、少なくとも前記構造(1)及び(3)を採用した
場合において、シリンダ部の操縦側の外壁に、トップデ
ッキからスカート部上部に至る上下方向のリブを設け、
これによって前記構造(3)における剛性を高め、該リブ
に繋げて操縦側の主軸受ボルトボス部を通って主軸受キ
ャップ合わせ面まで至るリブを設けるとともに、非操縦
側の主軸受ボルトボス部を通って主軸受キャップ合わせ
面まで至るリブを設け、これによって前記(1)における
剛性を高めたものである。According to a fifth aspect of the present invention, in the first aspect of the invention, when at least the structures (1) and (3) are adopted, the outer wall on the steering side of the cylinder portion is provided from the top deck to the upper portion of the skirt portion. Up and down ribs
This increases the rigidity of the structure (3), and provides a rib connected to the rib and extending to the mating surface of the main bearing cap through the main bearing bolt boss on the steering side, and through the main bearing bolt boss on the non-control side through the main bearing bolt boss. A rib extending to the main bearing cap mating surface is provided, thereby increasing the rigidity in the above (1).
【0017】請求項5記載の発明においては、リブを形
成するだけで、前記構造(1)及び(3)を実現できるので、
製造作業が容易である。According to the fifth aspect of the present invention, the structures (1) and (3) can be realized only by forming the ribs.
Manufacturing work is easy.
【0018】請求項6記載の発明は、請求項1記載の発
明において、前記構造(1)又は(2)を採用した場合におい
て、肉厚を調節することによって剛性を高めたものであ
る。According to a sixth aspect of the present invention, in the first aspect of the invention, when the structure (1) or (2) is adopted, the rigidity is increased by adjusting the thickness.
【0019】請求項6記載の発明においては、肉厚の調
節によって剛性が高められるので、製造作業が容易であ
る。According to the sixth aspect of the present invention, since the rigidity is increased by adjusting the thickness, the manufacturing operation is easy.
【0020】請求項7記載の発明は、請求項2又は3に
記載の発明において、前記構造(1)を採用した場合にお
いて、主軸受ボルトボス部の肉厚の0.5〜1.0倍の
肉厚とすることによって剛性を高めたものである。According to a seventh aspect of the present invention, when the structure (1) is employed in the second or third aspect, the thickness of the main bearing bolt boss is 0.5 to 1.0 times the wall thickness. The rigidity is enhanced by increasing the wall thickness.
【0021】請求項7記載の発明においては、0.5倍
以上であるので、剛性は高くなり、1.0倍以下である
ので、軽量化も図られる。In the present invention, the rigidity is increased by 0.5 times or more, and the weight is reduced by 1.0 times or less.
【0022】請求項8記載の発明は、請求項1記載の発
明において、前記構造(2)を採用した場合において、主
軸受キャップの肉厚の0.5〜1.0倍の肉厚とするこ
とによって剛性を高めたものである。According to an eighth aspect of the present invention, when the structure (2) is adopted in the first aspect, the thickness of the main bearing cap is 0.5 to 1.0 times the thickness of the main bearing cap. This increases the rigidity.
【0023】請求項8記載の発明においては、0.5倍
以上であるので、剛性は高くなり、1.0倍以下である
ので、軽量化も図られる。According to the eighth aspect of the present invention, the rigidity is increased because it is 0.5 times or more, and the weight is reduced because it is 1.0 times or less.
【0024】請求項9記載の発明は、請求項1記載の発
明において、前記構造(1)又は(2)を採用した場合におい
て、前記他の隔壁の構成材料よりヤング率の高い材料を
鋳込むことによって剛性を高めたものである。According to a ninth aspect of the present invention, in the first aspect of the present invention, when the structure (1) or (2) is employed, a material having a higher Young's modulus than the constituent material of the other partition wall is cast. This increases the rigidity.
【0025】請求項9記載の発明においては、隔壁の構
成材料を変質させることによって剛性が高められるの
で、肉厚を調節することによって剛性を高める場合に比
して、軽量化が図られる。According to the ninth aspect of the present invention, since the rigidity is increased by altering the material of the partition wall, the weight can be reduced as compared with the case where the rigidity is increased by adjusting the wall thickness.
【0026】請求項10記載の発明は、請求項1記載の
発明において、前記構造(3)を採用した場合において、
シリンダ部の操縦側のトップデッキからスカート部上部
に至る壁部に、シリンダ部の他の部分の構成材料よりヤ
ング率の高い材料を鋳込むことによって剛性を高めたも
のである。According to a tenth aspect of the present invention, when the structure (3) is adopted in the first aspect,
The rigidity is increased by casting a material having a higher Young's modulus than the constituent material of the other parts of the cylinder portion into a wall portion extending from the top deck on the operation side of the cylinder portion to the upper portion of the skirt portion.
【0027】なお、請求項9及び10に記載の発明にお
いて、ヤング率の高い材料は、母材よりヤング率が高い
材料であり、例えば母材がFC材の場合ではFCDやS
USを用いる。In the inventions according to the ninth and tenth aspects, the material having a higher Young's modulus is a material having a higher Young's modulus than the base material. For example, when the base material is an FC material, FCD or SCD is used.
US is used.
【0028】請求項10記載の発明においては、シリン
ダ部の構成材料を変質させることによって剛性が高めら
れるので、リブを設けることによって剛性を高める場合
に比して、軽量化が図られる。According to the tenth aspect of the present invention, since the rigidity is increased by altering the constituent material of the cylinder portion, the weight can be reduced as compared with the case where the rigidity is increased by providing the ribs.
【0029】請求項11記載の発明は、請求項1記載の
発明において、前記構造(1)又は(2)を採用した場合にお
いて、前記他の隔壁の肉厚を、鋳物としての最低の肉厚
としたものである。According to an eleventh aspect of the present invention, when the structure (1) or (2) is adopted in the first aspect, the thickness of the other partition wall is set to a minimum thickness as a casting. It is what it was.
【0030】請求項11記載の発明においては、シリン
ダブロックの変形を抑制しながら、最大の軽量化が図ら
れる。According to the eleventh aspect of the invention, the maximum weight reduction is achieved while suppressing deformation of the cylinder block.
【0031】[0031]
【発明の実施の形態】(実施形態1)図8は本実施形態
のシリンダブロック10の横断面略図である。図におい
て、2は主軸受キャップ、3は主軸受、4はロアデッ
キ、5は主軸受キャップ合わせ面、61はスカート部、
62はシリンダ部、7はオイルパン合わせ面、81はカ
ム室、82はカム室81を支持するリブ、9はトップデ
ッキである。また、カム室81のある側が非操縦側、そ
の反対側が操縦側である。(Embodiment 1) FIG. 8 is a schematic cross-sectional view of a cylinder block 10 of the present embodiment. In the figure, 2 is a main bearing cap, 3 is a main bearing, 4 is a lower deck, 5 is a main bearing cap mating surface, 61 is a skirt portion,
62 is a cylinder portion, 7 is an oil pan mating surface, 81 is a cam chamber, 82 is a rib for supporting the cam chamber 81, and 9 is a top deck. The side with the cam chamber 81 is the non-control side, and the opposite side is the control side.
【0032】本実施形態では、主軸受3回りの隔壁の
内、主軸受ボルトボス部Bのボス部隔壁11と、外側隔
壁12の内の主軸受キャップ合わせ面5からオイルパン
合わせ面7にかけての外側下部隔壁122の各剛性を、
外側隔壁12の内のロアデッキ4から主軸受キャップ合
わせ面5にかけての外側上部隔壁121及び内側隔壁1
3に比して高めている。具体的には、外側上部隔壁12
1及び内側隔壁13の各肉厚を鋳物として最低の肉厚と
し、ボス部隔壁11及び外側下部隔壁122の各肉厚を
それより厚くするとともに、外側下部隔壁122の肉厚
を主軸受キャップ2の肉厚の0.5〜1.0倍とした。In this embodiment, of the bulkheads around the main bearing 3, the boss partition walls 11 of the main bearing bolt bosses B and the outer walls 12 of the outer partition walls 12 from the main bearing cap mating surface 5 to the oil pan mating surface 7. Each rigidity of the lower partition 122 is
The outer upper partition 121 and the inner partition 1 from the lower deck 4 of the outer partition 12 to the main bearing cap mating surface 5.
It is higher than 3. Specifically, the outer upper partition 12
The thickness of each of the boss partition wall 11 and the outer lower partition wall 122 is made larger than that of the main bearing cap 2 and the thickness of the outer lower partition wall 122. 0.5 to 1.0 times the wall thickness of
【0033】上記構造のシリンダブロック10では、主
軸受キャップ2の上下方向の変形に最も影響するボス部
隔壁11の剛性を確保したので、主軸受キャップ2の上
下方向の変形が効果的に抑制され、しかも、主軸受キャ
ップ2のクランク軸方向の変形に最も影響する下向きリ
ブ構造(図5)に相当する部分を含んだ外側下部隔壁1
22の剛性を確保したので、主軸受キャップ2のクラン
ク軸方向の変形が効果的に抑制される。即ち、主軸受キ
ャップ2の上下方向の変形及び同じくクランク軸方向の
変形が共に抑制される。更に、外側上部隔壁121及び
内側隔壁13の肉厚を鋳物として最低の肉厚としたの
で、前記両変形を効果的に抑制しながら、最大の軽量化
が図られる。In the cylinder block 10 having the above structure, the rigidity of the boss partition wall 11, which most affects the vertical deformation of the main bearing cap 2, is ensured, so that the vertical deformation of the main bearing cap 2 is effectively suppressed. Moreover, the outer lower partition wall 1 including a portion corresponding to the downward rib structure (FIG. 5) that most affects the deformation of the main bearing cap 2 in the crankshaft direction.
Since the rigidity of the main bearing cap 22 is ensured, the deformation of the main bearing cap 2 in the crankshaft direction is effectively suppressed. That is, both the vertical deformation of the main bearing cap 2 and the deformation in the crankshaft direction are suppressed. Further, since the outer upper partition wall 121 and the inner partition wall 13 have the minimum thickness as a casting, the above-described deformation is effectively suppressed, and the maximum weight reduction is achieved.
【0034】(実施形態2)図9は本実施形態のシリン
ダブロック10の横断面略図である。図9において、図
8と同一符号は同じ又は相当するものを示す。本実施形
態では、ボス部隔壁11と、外側隔壁12全体即ち外側
上部隔壁121及び外側下部隔壁122の各剛性を、内
側隔壁13に比して高めている。具体的には、内側隔壁
13の肉厚を鋳物として最低の肉厚とし、ボス部隔壁1
1、外側上部隔壁121、及び外側下部隔壁122の各
肉厚をそれより厚くするとともに、外側上部隔壁121
の肉厚をボス部隔壁11の肉厚の0.5〜1.0倍と
し、且つ外側下部隔壁122の肉厚を主軸受キャップ2
の肉厚の0.5〜1.0倍とした。(Embodiment 2) FIG. 9 is a schematic cross-sectional view of a cylinder block 10 of this embodiment. 9, the same reference numerals as those in FIG. 8 denote the same or corresponding components. In the present embodiment, the rigidity of the boss partition 11 and the entire outer partition 12, that is, the rigidity of each of the outer upper partition 121 and the outer lower partition 122 is higher than that of the inner partition 13. Specifically, the thickness of the inner partition 13 is set to the minimum thickness as a casting, and
1. The thickness of each of the outer upper partition wall 121 and the outer lower partition wall 122 is made larger than that of the outer upper partition wall 121 and the outer upper partition wall 121.
Is 0.5 to 1.0 times the thickness of the boss partition 11, and the thickness of the outer lower partition 122 is the main bearing cap 2.
0.5 to 1.0 times the wall thickness of
【0035】上記構造のシリンダブロック10では、主
軸受キャップ2の上下方向の変形に最も影響するボス部
隔壁11の剛性を確保するだけでなく、主軸受キャップ
2の上下方向の変形に最も影響する上向きリブ構造(図
7)に相当する部分を含んだ外側上部隔壁121の剛性
も確保したので、主軸受キャップ2の上下方向の変形が
実施形態1の場合に比してより効果的に抑制され、しか
も、主軸受キャップ2のクランク軸方向の変形に最も影
響する下向きリブ構造に相当する部分を含んだ外側下部
隔壁122の剛性を確保したので、主軸受キャップ2の
クランク軸方向の変形が効果的に抑制される。即ち、主
軸受キャップ2の上下方向の変形及び同じくクランク軸
方向の変形が共に抑制される。更に、内側隔壁13の肉
厚を鋳物として最低の肉厚としたので、前記両変形を効
果的に抑制しながら、最大の軽量化が図られる。In the cylinder block 10 having the above structure, not only the rigidity of the boss partition wall 11 which most affects the vertical deformation of the main bearing cap 2 but also the vertical bearing deformation of the main bearing cap 2 is most affected. Since the rigidity of the outer upper partition wall 121 including the portion corresponding to the upward rib structure (FIG. 7) is also secured, the deformation of the main bearing cap 2 in the vertical direction is more effectively suppressed as compared with the first embodiment. In addition, since the rigidity of the outer lower partition wall 122 including the portion corresponding to the downward rib structure that most affects the deformation of the main bearing cap 2 in the crankshaft direction is secured, the deformation of the main bearing cap 2 in the crankshaft direction is effective. Is suppressed. That is, both the vertical deformation of the main bearing cap 2 and the deformation in the crankshaft direction are suppressed. Further, since the thickness of the inner partition wall 13 is set to the minimum thickness as a casting, the maximum weight reduction can be achieved while effectively suppressing the above-mentioned deformations.
【0036】(実施形態3)図10は本実施形態のシリ
ンダブロック10の横断面略図である。図10におい
て、図8と同一符号は同じ又は相当するものを示す。本
実施形態では、ボス部隔壁11と、外側上部隔壁121
であって主軸受キャップ合わせ面5から上向き45度以
上の上部上半部隔壁1211と、外側下部隔壁122の
各剛性を、外側上部隔壁121であって主軸受キャップ
合わせ面5から上向き45度未満の上部下半部隔壁12
12及び内側隔壁13に比して高めている。具体的に
は、上部下半部隔壁1212及び内側隔壁13の各肉厚
を鋳物として最低の肉厚とし、ボス部隔壁11、上部上
半部隔壁1211、及び外側下部隔壁122の各肉厚を
それより厚くするとともに、上部上半部隔壁1211の
肉厚をボス部隔壁11の肉厚の0.5〜1.0倍とし、
且つ外側下部隔壁122の肉厚を主軸受キャップ2の肉
厚の0.5〜1.0倍とした。(Embodiment 3) FIG. 10 is a schematic cross-sectional view of a cylinder block 10 of the present embodiment. 10, the same reference numerals as those in FIG. 8 denote the same or corresponding components. In this embodiment, the boss partition 11 and the outer upper partition 121 are provided.
The rigidity of the upper upper half partition 1211 and the outer lower partition 122 that is 45 degrees or more upward from the main bearing cap mating surface 5 and the outer upper partition 121 is less than 45 degrees upward from the main bearing cap mating surface 5. Upper lower half partition 12
12 and the inner partition wall 13. Specifically, each thickness of the upper lower half partition 1212 and the inner partition 13 is set to the minimum thickness as a casting, and each thickness of the boss partition 11, the upper upper half partition 1211 and the outer lower partition 122 is reduced. While making it thicker, the thickness of the upper upper half partition 1211 is set to 0.5 to 1.0 times the thickness of the boss partition 11,
The thickness of the outer lower partition wall 122 is set to 0.5 to 1.0 times the thickness of the main bearing cap 2.
【0037】上記構造のシリンダブロック10では、主
軸受キャップ2の上下方向の変形に最も影響するボス部
隔壁11の剛性を確保するだけでなく、主軸受キャップ
2の上下方向の変形に最も影響する上向きリブ構造に相
当する部分を含んだ上部上半部隔壁1211の剛性も確
保したので、実施形態2と同様に主軸受キャップ2の上
下方向の変形がより効果的に抑制され、しかも、主軸受
キャップ2のクランク軸方向の変形に最も影響する外側
下部隔壁122の剛性を確保したので、主軸受キャップ
2のクランク軸方向の変形が効果的に抑制される。即
ち、主軸受キャップ2の上下方向の変形及び主軸受キャ
ップ2のクランク軸方向の変形が共に抑制される。更
に、上部下半部隔壁1212及び内側隔壁13の各肉厚
を鋳物として最低の肉厚としたので、前記両変形を効果
的に抑制しながら、最大の軽量化が図られる。しかも、
上部上半部隔壁1211の領域は外側上部隔壁121よ
り小さいので、厚肉化する部分が実施形態2の場合より
少なく、その分だけ、実施形態2よりも軽量化が図られ
る。In the cylinder block 10 having the above structure, not only the rigidity of the boss partition wall 11, which most affects the vertical deformation of the main bearing cap 2, but also the vertical deformation of the main bearing cap 2 is most affected. Since the rigidity of the upper upper half partition 1211 including the portion corresponding to the upward rib structure is also ensured, the vertical deformation of the main bearing cap 2 is more effectively suppressed as in the second embodiment. Since the rigidity of the outer lower partition wall 122 that most affects the deformation of the cap 2 in the crankshaft direction is ensured, the deformation of the main bearing cap 2 in the crankshaft direction is effectively suppressed. That is, both the vertical deformation of the main bearing cap 2 and the deformation of the main bearing cap 2 in the crankshaft direction are suppressed. Furthermore, since the thickness of each of the upper and lower half partition walls 1212 and the inner partition wall 13 is set to the minimum thickness as a casting, maximum reduction in weight can be achieved while effectively suppressing both deformations. Moreover,
Since the region of the upper upper partition wall 1211 is smaller than the outer upper partition wall 121, the thickness of the portion is smaller than that of the second embodiment, and the weight is reduced by that much compared to the second embodiment.
【0038】(実施形態4)本実施形態は、図11に示
すように、実施形態1において、外側下部隔壁122全
体の剛性を高める代わりに、外側下部隔壁122の内側
周縁部1221のみの剛性を高め、その他は実施形態1
と同じとしたものである。具体的には、内側周縁部12
21の肉厚を主軸受キャップ2の肉厚の0.5〜1.0
倍とした。なお、外側下部隔壁122のその他の部分即
ち外側部1222の肉厚は鋳物として最低の肉厚とし
た。(Embodiment 4) In this embodiment, as shown in FIG. 11, instead of increasing the rigidity of the entire outer lower partition 122 in Embodiment 1, the rigidity of only the inner peripheral edge 1221 of the outer lower partition 122 is increased. High, others in the first embodiment
Is the same as Specifically, the inner peripheral portion 12
21 is 0.5 to 1.0 of the thickness of the main bearing cap 2.
Doubled. The thickness of the other portion of the outer lower partition wall 122, that is, the thickness of the outer portion 1222 was set to the minimum thickness as a casting.
【0039】これによっても、主軸受キャップ2のクラ
ンク軸方向の変形に最も影響する下向きリブ構造に実質
的に相当する内側周縁部1221の剛性を確保したの
で、実施形態1と同様の作用効果が発揮される。しか
も、内側周縁部1221の領域は外側下部隔壁122よ
り小さいので、厚肉化する部分が実施形態1の場合より
少なく、その分だけ、実施形態1よりも軽量化が図られ
る。This also ensures the rigidity of the inner peripheral portion 1221 substantially corresponding to the downward rib structure that most affects the deformation of the main bearing cap 2 in the crankshaft direction. Be demonstrated. Moreover, since the area of the inner peripheral portion 1221 is smaller than the outer lower partition wall 122, the thickness of the portion is smaller than that of the first embodiment, and the weight is reduced by that much compared to the first embodiment.
【0040】なお、外側下部隔壁122全体の代わりに
内側周縁部1221のみの剛性を高めるという前記構造
は、実施形態2,3においても適用できる。The above-described structure in which the rigidity of only the inner peripheral edge portion 1221 is increased instead of the entire outer lower partition wall 122 can be applied to the second and third embodiments.
【0041】(実施形態5)本実施形態は、図12に示
すように、実施形態3において、上部上半部隔壁121
1全体の剛性を高める代わりに、その下縁部1211a
のみの剛性を高め、外側下部隔壁122全体の剛性を高
める代わりに、その内側周縁部1221のみの剛性を高
め、その他は実施形態3と同じとしたものである。具体
的には、下縁部1211aの肉厚をボス部隔壁11の肉
厚の0.5〜1.0倍とし、内側周縁部1221の肉厚
を主軸受キャップ2の肉厚の0.5〜1.0倍とした。
なお、上部上半部隔壁1211のその他の部分即ち上側
部1211b及び外側下部隔壁122の外側部1222
の各肉厚は鋳物として最低の肉厚とした。(Embodiment 5) In this embodiment, as shown in FIG.
1 Instead of increasing the overall rigidity, its lower edge 1211a
Instead of increasing the rigidity of only the outer lower partition wall 122 and the rigidity of the entire outer lower partition 122, the rigidity of only the inner peripheral edge portion 1221 is increased, and the other configuration is the same as that of the third embodiment. Specifically, the thickness of the lower edge portion 1211a is set to 0.5 to 1.0 times the thickness of the boss partition wall 11, and the thickness of the inner peripheral portion 1221 is set to 0.5 times the thickness of the main bearing cap 2. 1.01.0 times.
The other portions of the upper upper partition 1211, that is, the upper portion 1211 b and the outer portion 1222 of the outer lower partition 122.
Were made the minimum thickness as a casting.
【0042】これによっても、主軸受キャップ2の上下
方向の変形に最も影響する上向きリブ構造に実質的に相
当する下縁部1211aの剛性を確保し、また、主軸受
キャップ2のクランク軸方向の変形に最も影響する下向
きリブ構造に実質的に相当する内側周縁部1221の剛
性を確保したので、実施形態3と同様の作用効果が発揮
される。しかも、下縁部1211aの領域は上部上半部
隔壁1211より小さく、また、内側周縁部1221の
領域は外側下部隔壁122より小さいので、厚肉化する
部分が実施形態3の場合より少なく、その分だけ、実施
形態3よりも軽量化が図られる。This also ensures the rigidity of the lower edge portion 1211a substantially corresponding to the upward rib structure that most affects the vertical deformation of the main bearing cap 2, and also allows the main bearing cap 2 to be moved in the crankshaft direction. Since the rigidity of the inner peripheral portion 1221 substantially corresponding to the downward rib structure that most affects the deformation is secured, the same operation and effect as in the third embodiment are exerted. Moreover, since the area of the lower edge 1211a is smaller than the upper upper partition 1211 and the area of the inner peripheral edge 1221 is smaller than the outer lower partition 122, the thickness of the portion is smaller than that of the third embodiment. For this reason, the weight can be reduced as compared with the third embodiment.
【0043】なお、上部上半部隔壁1211全体の代わ
りに下縁部1211aのみの剛性を高め、且つ外側下部
隔壁122全体の代わりに内側周縁部1221のみの剛
性を高めるという前記構造は、実施形態2においても適
用できる。The structure in which the rigidity of only the lower edge 1211a is increased instead of the entire upper upper half partition 1211 and the rigidity of only the inner peripheral edge 1221 is increased instead of the entire outer lower partition 122 is described in the embodiment. 2 can also be applied.
【0044】(実施形態6)実施形態1〜5において、
剛性を高める隔壁の肉厚を調節することによってその隔
壁の剛性を高める代わりに、剛性を高める隔壁に、他の
隔壁の構成材料よりヤング率の高い材料を鋳込むことに
よって剛性を高めるようにしてもよい。ヤング率の高い
材料は、母材よりヤング率が高い材料であり、例えば母
材がFC材の場合ではFCDやSUSを用いる。(Embodiment 6) In Embodiments 1 to 5,
Instead of increasing the rigidity of the bulkhead by adjusting the wall thickness of the bulkhead that increases the rigidity, the rigidity of the bulkhead is increased by casting a material having a higher Young's modulus than the constituent material of the other bulkheads. Is also good. The material having a higher Young's modulus is a material having a higher Young's modulus than the base material. For example, when the base material is an FC material, FCD or SUS is used.
【0045】これによれば、実施形態1〜5と同様の作
用効果が発揮されるとともに、隔壁の構成材料を変質さ
せることによって剛性が高められるので、肉厚を調節す
ることによって剛性を高める実施形態1〜5の場合に比
して、軽量化が図られる。According to this, the same operation and effect as those of the first to fifth embodiments can be exhibited, and the rigidity can be increased by altering the constituent material of the partition walls. Therefore, the rigidity can be increased by adjusting the wall thickness. Weight reduction is achieved as compared with the cases of modes 1 to 5.
【0046】(実施形態7)図13は本実施形態のシリ
ンダブロック10の横断面略図である。図13におい
て、図8と同一符号は同じ又は相当するものを示す。本
実施形態では、主軸受3回りの隔壁の内、主軸受ボルト
ボス部Bのボス部隔壁11の剛性を、外側隔壁12及び
内側隔壁13に比して高めるとともに、シリンダ部62
の操縦側の剛性を高めてシリンダ部62の非操縦側の剛
性と同等としている。具体的には、外側隔壁12及び内
側隔壁13の各肉厚を鋳物として最低の肉厚とし、ボス
部隔壁11の肉厚をそれより厚くするとともに、シリン
ダ部62の操縦側の外壁にトップデッキ9からスカート
部61上部に至るリブ15を設けた。リブ15は、ボア
間及びジャーナル間中心に、複数列設けられている。(Embodiment 7) FIG. 13 is a schematic cross-sectional view of a cylinder block 10 of the present embodiment. 13, the same reference numerals as those in FIG. 8 denote the same or corresponding components. In the present embodiment, the rigidity of the boss partition wall 11 of the main bearing bolt boss portion B of the partition wall around the main bearing 3 is increased as compared with the outer partition wall 12 and the inner partition wall 13, and the cylinder section 62.
The rigidity on the control side is increased to be equal to the rigidity on the non-control side of the cylinder portion 62. Specifically, the thickness of each of the outer partition wall 12 and the inner partition wall 13 is set to the minimum thickness as a casting, the thickness of the boss partition wall 11 is made larger than that, and the top deck is mounted on the outer wall of the cylinder section 62 on the control side. A rib 15 extending from 9 to the upper part of the skirt 61 is provided. A plurality of ribs 15 are provided in the center between the bores and between the journals.
【0047】上記構造のシリンダブロック10では、主
軸受キャップ2の上下方向の変形に最も影響するボス部
隔壁11の剛性を確保したので、主軸受キャップ2の上
下方向の変形が効果的に抑制され、しかも、リブ15に
よってシリンダ部62の操縦側の剛性を高めてシリンダ
部62の非操縦側の剛性と同等としたので、シリンダブ
ロック10の操縦側に凸となる変形が抑制される。即
ち、主軸受キャップ2の上下方向の変形及びシリンダブ
ロック10の操縦側に凸となる変形が共に抑制される。
更に、外側隔壁12及び内側隔壁13の肉厚を鋳物とし
て最低の肉厚としたので、前記両変形を効果的に抑制し
ながら、最大の軽量化が図られる。In the cylinder block 10 having the above structure, the rigidity of the boss partition wall 11, which most affects the vertical deformation of the main bearing cap 2, is ensured, so that the vertical deformation of the main bearing cap 2 is effectively suppressed. In addition, since the rigidity of the cylinder portion 62 on the control side is increased by the ribs 15 to be equal to the rigidity of the cylinder portion 62 on the non-control side, deformation of the cylinder block 10 that is convex on the control side is suppressed. That is, the deformation of the main bearing cap 2 in the vertical direction and the deformation of the cylinder block 10 that is convex on the steering side are both suppressed.
Furthermore, since the thickness of the outer partition 12 and the inner partition 13 is made the minimum thickness as a casting, the maximum weight reduction can be achieved while effectively suppressing both the deformations.
【0048】(実施形態8)図14は本実施形態のシリ
ンダブロック10の横断面略図である。図14におい
て、図8と同一符号は同じ又は相当するものを示す。本
実施形態では、ボス部隔壁11と、外側上部隔壁121
の各剛性を、外側下部隔壁122及び内側隔壁13に比
して高めるとともに、シリンダ部62の操縦側の剛性を
高めてシリンダ部62の非操縦側の剛性と同等としてい
る。具体的には、外側下部隔壁122及び内側隔壁13
の各肉厚を鋳物として最低の肉厚とし、ボス部隔壁11
及び外側上部隔壁121の各肉厚をそれより厚くすると
ともに、外側上部隔壁121の肉厚をボス部隔壁11の
肉厚の0.5〜1.0倍とし、更に、シリンダ部62の
操縦側の外壁にトップデッキ9からスカート部61上部
に至るリブ15を設けた。リブ15は、ボア間及びジャ
ーナル間中心に、複数列設けられている。(Eighth Embodiment) FIG. 14 is a schematic cross-sectional view of a cylinder block 10 of the present embodiment. 14, the same reference numerals as those in FIG. 8 denote the same or corresponding components. In this embodiment, the boss partition 11 and the outer upper partition 121 are provided.
Are increased in comparison with the outer lower partition wall 122 and the inner partition wall 13, and the rigidity of the cylinder portion 62 on the control side is increased to be equal to the rigidity of the cylinder portion 62 on the non-control side. Specifically, the outer lower partition 122 and the inner partition 13
Of the boss partition 11
The thickness of the outer upper partition 121 is made larger than that, the thickness of the outer upper partition 121 is set to 0.5 to 1.0 times the thickness of the boss partition 11, and The ribs 15 extending from the top deck 9 to the upper part of the skirt portion 61 are provided on the outer wall of the. A plurality of ribs 15 are provided in the center between the bores and between the journals.
【0049】上記構造のシリンダブロック10では、主
軸受キャップ2の上下方向の変形に最も影響するボス部
隔壁11の剛性を確保するだけでなく、主軸受キャップ
2の上下方向の変形に最も影響する上向きリブ構造に相
当する部分を含んだ外側上部隔壁121の剛性も確保す
るので、主軸受キャップ2の上下方向の変形が実施形態
7の場合に比してより効果的に抑制され、しかも、リブ
15によってシリンダ部62の操縦側の剛性を高めてシ
リンダ部62の非操縦側の剛性と同等としたので、シリ
ンダブロック10の操縦側に凸となる変形が抑制され
る。即ち、主軸受キャップ2の上下方向の変形及びシリ
ンダブロック10の操縦側に凸となる変形が共に抑制さ
れる。更に、外側下部隔壁122及び内側隔壁13の各
肉厚を鋳物として最低の肉厚としたので、前記両変形を
効果的に抑制しながら、最大の軽量化が図られる。In the cylinder block 10 having the above-described structure, not only the rigidity of the boss partition wall 11 which most affects the vertical deformation of the main bearing cap 2 is ensured, but also the vertical deformation of the main bearing cap 2 is most affected. Since the rigidity of the outer upper partition wall 121 including the portion corresponding to the upward rib structure is also ensured, the deformation of the main bearing cap 2 in the vertical direction is more effectively suppressed than in the case of the seventh embodiment. 15, the rigidity of the cylinder portion 62 on the control side is increased to be equal to the rigidity of the cylinder portion 62 on the non-control side, so that deformation of the cylinder block 10 that is convex on the control side is suppressed. That is, the deformation of the main bearing cap 2 in the vertical direction and the deformation of the cylinder block 10 that is convex on the steering side are both suppressed. Furthermore, since the thickness of each of the outer lower partition wall 122 and the inner partition wall 13 is set to the minimum thickness as a casting, maximum reduction in weight can be achieved while effectively suppressing both deformations.
【0050】(実施形態9)図15は本実施形態のシリ
ンダブロック10の横断面略図である。図15におい
て、図8と同一符号は同じ又は相当するものを示す。本
実施形態では、ボス部隔壁11と、上部上半部隔壁12
11の各剛性を、上部下半部隔壁1212、外側下部隔
壁122、及び内側隔壁13に比して高めるとともに、
シリンダ部62の操縦側の剛性を高めてシリンダ部62
の非操縦側の剛性と同等としている。具体的には、上部
下半部隔壁1212、外側下部隔壁122、及び内側隔
壁13の各肉厚を鋳物として最低の肉厚とし、ボス部隔
壁11及び上部上半部隔壁1211の各肉厚をそれより
厚くするとともに、上部上半部隔壁1211の肉厚をボ
ス部隔壁11の肉厚の0.5〜1.0倍とし、更に、シ
リンダ部62の操縦側の外壁にトップデッキ9からスカ
ート部61上部に至るリブ15を設けた。リブ15は、
ボア間及びジャーナル間中心に、複数列設けられてい
る。(Embodiment 9) FIG. 15 is a schematic cross-sectional view of a cylinder block 10 of the present embodiment. 15, the same reference numerals as those in FIG. 8 denote the same or corresponding components. In the present embodiment, the boss partition 11 and the upper upper half partition 12
11 while increasing the rigidity of each of the upper and lower halves 1212, the outer lower partition 122, and the inner partition 13,
By increasing the rigidity of the cylinder portion 62 on the control side,
The rigidity on the non-control side is the same. Specifically, each thickness of the upper lower half partition 1212, the outer lower partition 122, and the inner partition 13 is set to the minimum thickness as a casting, and the respective thicknesses of the boss partition 11 and the upper upper partition 1211 are reduced. The thickness of the upper upper partition 1211 is set to be 0.5 to 1.0 times the thickness of the boss partition 11, and the outer side wall of the cylinder portion 62 on the control side is further skirted from the top deck 9. The rib 15 reaching the upper part of the part 61 was provided. The rib 15
A plurality of rows are provided between the bores and between the journals.
【0051】上記構造のシリンダブロック10では、主
軸受キャップ2の上下方向の変形に最も影響するボス部
隔壁11の剛性を確保するだけでなく、主軸受キャップ
2の上下方向の変形に最も影響する上向きリブ構造に実
質的に相当する上部上半部隔壁1211の剛性も確保す
るので、実施形態8と同様に主軸受キャップ2の上下方
向の変形がより効果的に抑制され、しかも、リブ15に
よってシリンダ部62の操縦側の剛性を高めてシリンダ
部62の非操縦側の剛性と同等としたので、シリンダブ
ロック10の操縦側に凸となる変形が抑制される。即
ち、主軸受キャップ2の上下方向の変形及びシリンダブ
ロック10の操縦側に凸となる変形が共に抑制される。
更に、上部下半部隔壁1212、外側下部隔壁122、
及び内側隔壁13の各肉厚を鋳物として最低の肉厚とし
たので、前記両変形を効果的に抑制しながら、最大の軽
量化が図られる。しかも、上部上半部隔壁1211の領
域は外側上部隔壁121より小さいので、厚肉化する部
分が実施形態8の場合より少なく、その分だけ、実施形
態8よりも軽量化が図られる。In the cylinder block 10 having the above-described structure, not only the rigidity of the boss partition wall 11, which most affects the vertical deformation of the main bearing cap 2, but also the vertical deformation of the main bearing cap 2 is most affected. Since the rigidity of the upper upper half partition wall 1211 substantially corresponding to the upward rib structure is also ensured, the vertical deformation of the main bearing cap 2 is more effectively suppressed as in the eighth embodiment. Since the rigidity of the cylinder portion 62 on the control side is increased to be equal to the rigidity of the cylinder portion 62 on the non-control side, deformation of the cylinder block 10 that is convex on the control side is suppressed. That is, the deformation of the main bearing cap 2 in the vertical direction and the deformation of the cylinder block 10 that is convex on the steering side are both suppressed.
Further, an upper lower half partition 1212, an outer lower partition 122,
In addition, since the thickness of each of the inner partition walls 13 is set to the minimum thickness as a casting, the maximum weight reduction can be achieved while effectively suppressing the above-mentioned deformations. In addition, since the region of the upper upper partition wall 1211 is smaller than the outer upper partition wall 121, the number of thickened portions is smaller than in the case of the eighth embodiment, and the weight is reduced as much as that of the eighth embodiment.
【0052】(実施形態10)図16は本実施形態のシ
リンダブロック10の横断面略図である。図16におい
て、図8と同一符号は同じ又は相当するものを示す。本
実施形態では、主軸受ボルトボス部Bの剛性を、外側隔
壁12及び内側隔壁13に比して高めるとともに、シリ
ンダ部62の操縦側の剛性を高めてシリンダ部62の非
操縦側の剛性と同等としている。具体的には、シリンダ
部62の操縦側の外壁にトップデッキ9からスカート部
61上部に至るリブ15を設けるとともに、リブ15に
繋げて、操縦側の主軸受ボルトボス部Bを通って主軸受
キャップ合わせ面5まで至るリブ161を設けた。リブ
15は、ボア間及びジャーナル間中心に、複数列設けら
れており、リブ161と繋がっているリブ15はジャー
ナル間中心に設けられたものである。また、非操縦側の
主軸受ボルトボス部Bにもリブ161と対称にリブ16
2を設けた。更に、外側隔壁12及び内側隔壁13の各
肉厚を鋳物として最低の肉厚とした。(Embodiment 10) FIG. 16 is a schematic cross-sectional view of a cylinder block 10 of this embodiment. In FIG. 16, the same reference numerals as those in FIG. 8 denote the same or corresponding components. In the present embodiment, the rigidity of the main bearing bolt boss portion B is increased as compared with the outer partition wall 12 and the inner partition wall 13, and the rigidity of the cylinder portion 62 on the control side is increased to be equal to the rigidity of the cylinder portion 62 on the non-control side. And Specifically, a rib 15 extending from the top deck 9 to the upper part of the skirt portion 61 is provided on the outer wall on the control side of the cylinder portion 62, and is connected to the rib 15 so as to pass through the main bearing bolt boss B on the control side and pass the main bearing cap. A rib 161 reaching the mating surface 5 was provided. The ribs 15 are provided in a plurality of rows at the center between the bores and between the journals, and the ribs 15 connected to the ribs 161 are provided at the center between the journals. Also, the ribs 16 are provided symmetrically with the rib 161 on the main bearing bolt boss portion B on the non-steering side.
2 were provided. Further, the thickness of each of the outer partition wall 12 and the inner partition wall 13 was set to the minimum thickness as a casting.
【0053】上記構造のシリンダブロック10では、リ
ブ15によってシリンダ部62の操縦側の剛性を高めて
シリンダ部62の非操縦側の剛性と同等としたので、シ
リンダブロック10の操縦側に凸となる変形が抑制さ
れ、しかも、主軸受キャップ2の上下方向の変形に最も
影響する主軸受ボルトボス部Bの剛性をリブ161,1
62によって確保したので、主軸受キャップ2の上下方
向の変形が効果的に抑制される。即ち、シリンダブロッ
ク10の操縦側に凸となる変形及び主軸受キャップ2の
上下方向の変形が共に抑制される。更に、外側隔壁12
及び内側隔壁13の各肉厚を鋳物として最低の肉厚とし
たので、前記両変形を効果的に抑制しながら、最大の軽
量化が図られる。しかも、リブ15とリブ161とが繋
がって形成されるので、製造作業が容易である。In the cylinder block 10 having the above-described structure, the rigidity of the cylinder portion 62 on the control side is increased by the ribs 15 to be equal to the rigidity of the cylinder portion 62 on the non-control side. Deformation is suppressed, and the rigidity of the main bearing bolt boss portion B, which most affects the vertical deformation of the main bearing cap 2, is reduced by the ribs 161,1.
62, the deformation of the main bearing cap 2 in the vertical direction is effectively suppressed. That is, both the deformation of the cylinder block 10 that is convex on the steering side and the deformation of the main bearing cap 2 in the vertical direction are suppressed. Further, the outer partition 12
In addition, since the thickness of each of the inner partition walls 13 is set to the minimum thickness as a casting, the maximum weight reduction can be achieved while effectively suppressing the above-mentioned deformations. Moreover, since the ribs 15 and the ribs 161 are formed so as to be connected, the manufacturing operation is easy.
【0054】(実施形態11)本実施形態は、図17に
示すように、実施形態7において、リブ15を設けるこ
とによって剛性を高める代わりに、シリンダ部62の操
縦側のトップデッキ9からスカート部61上部に至る壁
部17に、シリンダ部62の他の部分の構成材料よりヤ
ング率の高い材料を鋳込むことによって剛性を高め、ボ
ス部隔壁11の肉厚を調節することによって剛性を高め
る代わりに、ボス部隔壁11に、主軸受3回りの他の隔
壁12,13の構成材料よりヤング率の高い材料を鋳込
むことによって剛性を高めたものである。ヤング率の高
い材料は、母材よりヤング率が高い材料であり、例えば
母材がFC材の場合ではFCDやSUSを用いる。(Embodiment 11) In this embodiment, as shown in FIG. 17, instead of increasing the rigidity by providing the ribs 15 in the embodiment 7, instead of increasing the stiffness from the top deck 9 on the control side of the cylinder portion 62, Instead of increasing the rigidity by casting a material having a higher Young's modulus than the constituent material of the other part of the cylinder portion 62 into the wall portion 17 reaching the upper portion, and increasing the rigidity by adjusting the thickness of the boss portion partition wall 11. The rigidity is increased by casting a material having a higher Young's modulus than the constituent material of the other partitions 12 and 13 around the main bearing 3 into the boss partition 11. The material having a higher Young's modulus is a material having a higher Young's modulus than the base material. For example, when the base material is an FC material, FCD or SUS is used.
【0055】これによれば、実施形態7と同様の作用効
果が発揮されるとともに、隔壁の構成材料を変質させる
ことによって剛性が高められるので、肉厚を調節するこ
とによって剛性を高める実施形態7の場合に比して、軽
量化が図られる。According to this, the same operation and effect as those of the seventh embodiment are exhibited, and the rigidity is enhanced by altering the constituent material of the partition walls. Therefore, the rigidity is enhanced by adjusting the wall thickness. Lightening is achieved as compared with the case of
【0056】なお、ヤング率の高い材料を鋳込むことに
よって剛性を高めるという前記構造は、実施形態8,9
においても適用できる。The structure in which the rigidity is increased by casting a material having a high Young's modulus is described in the eighth and ninth embodiments.
Can be applied to
【0057】(実施形態12)図18は本実施形態のシ
リンダブロック10の横断面略図である。図18におい
て、図8と同一符号は同じ又は相当するものを示す。本
実施形態では、外側隔壁12の内の外側下部隔壁122
の剛性を、ボス部隔壁11、外側上部隔壁121、及び
内側隔壁13に比して高めるとともに、シリンダ部62
の操縦側の剛性を高めてシリンダ部62の非操縦側の剛
性と同等としている。具体的には、ボス部隔壁11、外
側上部隔壁121、及び内側隔壁13の各肉厚を鋳物と
して最低の肉厚とし、外側下部隔壁122の肉厚をそれ
より厚くし且つ主軸受キャップ2の肉厚の0.5〜1.
0倍とし、更に、シリンダ部62の操縦側の外壁にトッ
プデッキ9からスカート部61上部に至るリブ15を設
けた。リブ15は、ボア間及びジャーナル間中心に、複
数列設けられている。(Embodiment 12) FIG. 18 is a schematic cross-sectional view of a cylinder block 10 of the present embodiment. 18, the same reference numerals as those in FIG. 8 denote the same or corresponding components. In the present embodiment, the outer lower partition 122 of the outer partition 12 is used.
The rigidity of the cylinder portion 62 is increased as compared with the boss portion partition wall 11, the outer upper partition wall 121, and the inner partition wall 13.
The rigidity on the control side is increased to be equal to the rigidity on the non-control side of the cylinder portion 62. Specifically, the thickness of each of the boss partition wall 11, the outer upper partition wall 121, and the inner partition wall 13 is set to the minimum thickness as a casting, the thickness of the outer lower partition wall 122 is made larger than that, and the thickness of the main bearing cap 2 is increased. 0.5-1.
The rib 15 is provided on the outer wall on the control side of the cylinder part 62 and extends from the top deck 9 to the upper part of the skirt part 61. A plurality of ribs 15 are provided in the center between the bores and between the journals.
【0058】上記構造のシリンダブロック10では、主
軸受キャップ2のクランク軸方向の変形に最も影響する
下向きリブ構造に相当する部分を含んだ外側下部隔壁1
22の剛性を確保したので、主軸受キャップ2のクラン
ク軸方向の変形が効果的に抑制され、しかも、リブ15
によってシリンダ部62の操縦側の剛性を高めてシリン
ダ部62の非操縦側の剛性と同等としたので、シリンダ
ブロック10の操縦側に凸となる変形が抑制される。即
ち、即ち、主軸受キャップ2のクランク軸方向の変形及
びシリンダブロック10の操縦側に凸となる変形が共に
抑制される。更に、ボス部隔壁11、外側上部隔壁12
1、及び内側隔壁13の各肉厚を鋳物として最低の肉厚
としたので、前記両変形を効果的に抑制しながら、最大
の軽量化が図られる。In the cylinder block 10 having the above structure, the outer lower partition wall 1 includes a portion corresponding to the downward rib structure which most affects the deformation of the main bearing cap 2 in the crankshaft direction.
22, the deformation of the main bearing cap 2 in the crankshaft direction is effectively suppressed, and the ribs 15
As a result, the rigidity of the cylinder portion 62 on the control side is increased to be equal to the rigidity of the cylinder portion 62 on the non-control side, so that deformation of the cylinder block 10 that is convex on the control side is suppressed. That is, both the deformation of the main bearing cap 2 in the crankshaft direction and the deformation of the cylinder block 10 protruding toward the steering side are suppressed. Further, the boss partition 11 and the outer upper partition 12
Since the thickness of each of the first and inner partition walls 13 is set to the minimum thickness as a casting, the maximum reduction in weight can be achieved while effectively suppressing the above-mentioned deformations.
【0059】(実施形態13)本実施形態は、図19に
示すように、実施形態12において、外側下部隔壁12
2全体の剛性を高める代わりに、外側下部隔壁122の
内側周縁部1221のみの剛性を高め、その他は実施形
態12と同じとしたものである。具体的には、内側周縁
部1221の肉厚を主軸受キャップ2の肉厚の0.5〜
1.0倍とした。なお、外側下部隔壁122の外側部1
222の肉厚は鋳物として最低の肉厚とした。(Embodiment 13) As shown in FIG. 19, this embodiment differs from Embodiment 12 in that
Instead of increasing the overall rigidity, the rigidity of only the inner peripheral edge 1221 of the outer lower partition wall 122 is increased, and the other components are the same as in the twelfth embodiment. Specifically, the thickness of the inner peripheral portion 1221 is set to 0.5 to the thickness of the main bearing cap 2.
1.0 times. The outer portion 1 of the outer lower partition 122
The thickness of 222 was the minimum thickness as a casting.
【0060】これによっても、実施形態12と同様の作
用効果が発揮されるとともに、主軸受キャップ2のクラ
ンク軸方向の変形に最も影響する下向きリブ構造に実質
的に相当する内側周縁部1221の剛性を確保したの
で、実施形態12と同様の作用効果が発揮される。しか
も、内側周縁部1221の領域は外側下部隔壁122よ
り小さいので、厚肉化する部分が実施形態12の場合よ
り少なく、その分だけ、実施形態12よりも軽量化が図
られる。With this configuration, the same operation and effect as those of the twelfth embodiment are exhibited, and the rigidity of the inner peripheral edge portion 1221 substantially corresponding to the downward rib structure which most affects the deformation of the main bearing cap 2 in the crankshaft direction. Therefore, the same function and effect as those of the twelfth embodiment are exerted. In addition, since the area of the inner peripheral edge portion 1221 is smaller than the outer lower partition wall 122, the thickness of the portion is smaller than that of the twelfth embodiment, and the weight is reduced by that much compared to the twelfth embodiment.
【0061】(実施形態14)本実施形態は、図20に
示すように、実施形態13において、リブ15を設ける
ことによって剛性を高める代わりに、シリンダ部62の
操縦側のトップデッキ9からスカート部61上部に至る
壁部17に、シリンダ部62の他の部分の構成材料より
ヤング率の高い材料を鋳込むことによって剛性を高め、
内側周縁部1221の肉厚を調節することによって剛性
を高める代わりに、内側周縁部1221に、主軸受3回
りの他の隔壁の構成材料よりヤング率の高い材料を鋳込
むことによって剛性を高め、その他は実施形態13と同
じとしたものである。(Embodiment 14) In this embodiment, as shown in FIG. 20, instead of increasing the rigidity by providing the ribs 15 in the embodiment 13, instead of increasing the rigidity, the skirt portion is moved from the top deck 9 on the control side of the cylinder portion 62. The rigidity is increased by casting a material having a higher Young's modulus than the constituent material of the other part of the cylinder part 62 into the wall part 17 reaching the upper part of the cylinder part 61,
Instead of increasing the rigidity by adjusting the thickness of the inner peripheral portion 1221, the rigidity is increased by casting a material having a Young's modulus higher than that of the other partition walls around the main bearing 3 into the inner peripheral portion 1221. Others are the same as the thirteenth embodiment.
【0062】これによれば、実施形態13と同様の作用
効果が発揮されるとともに、隔壁の構成材料を変質させ
ることによって剛性が高められるので、肉厚を調節する
ことによって剛性を高める実施形態13の場合に比し
て、軽量化が図られる。According to this, the same operation and effect as those of the thirteenth embodiment can be obtained, and the rigidity can be increased by altering the constituent material of the partition walls. Therefore, the thirteenth embodiment can increase the rigidity by adjusting the wall thickness. Lightening is achieved as compared with the case of
【0063】なお、ヤング率の高い材料を鋳込むことに
よって剛性を高めるという前記構造は、実施形態12に
おいても適用できる。The structure in which the rigidity is increased by casting a material having a high Young's modulus can be applied to the twelfth embodiment.
【0064】(実施形態15)図21は本実施形態のシ
リンダブロック10の横断面略図である。図21におい
て、図8と同一符号は同じ又は相当するものを示す。本
実施形態では、主軸受3回りの隔壁の内、主軸受ボルト
ボス部Bのボス部隔壁11と、外側隔壁12の外側下部
隔壁122の各剛性を、外側上部隔壁121及び内側隔
壁13に比して高めるとともに、シリンダ部62の操縦
側の剛性を高めてシリンダ部62の非操縦側の剛性と同
等としている。具体的には、外側上部隔壁121及び内
側隔壁13の各肉厚を鋳物として最低の肉厚とし、ボス
部隔壁11及び外側下部隔壁122の各肉厚をそれより
厚くするとともに、外側下部隔壁122の肉厚を主軸受
キャップ2の肉厚の0.5〜1.0倍とし、シリンダ部
62の操縦側の外壁にトップデッキ9からスカート部6
1上部に至るリブ15を設けた。リブ15は、ボア間及
びジャーナル間中心に、複数列設けられている。(Embodiment 15) FIG. 21 is a schematic cross-sectional view of a cylinder block 10 of the present embodiment. 21, the same reference numerals as those in FIG. 8 denote the same or corresponding components. In the present embodiment, the rigidity of the boss partition wall 11 of the main bearing bolt boss B and the outer lower partition wall 122 of the outer partition wall 12 among the partition walls around the main bearing 3 are compared with those of the outer upper partition wall 121 and the inner partition wall 13. And the rigidity of the cylinder portion 62 on the control side is increased to be equal to the rigidity of the cylinder portion 62 on the non-control side. Specifically, the thickness of each of the outer upper partition 121 and the inner partition 13 is set to a minimum thickness as a casting, and the thickness of each of the boss partition 11 and the outer lower partition 122 is made larger. Of the main bearing cap 2 is 0.5 to 1.0 times the thickness of the main bearing cap 2, and the top deck 9 and the skirt 6
One rib 15 was provided to reach the upper part. A plurality of ribs 15 are provided in the center between the bores and between the journals.
【0065】上記構造のシリンダブロック10では、主
軸受キャップ2の上下方向の変形に最も影響するボス部
隔壁11の剛性を確保したので、主軸受キャップ2の上
下方向の変形が効果的に抑制され、また、主軸受キャッ
プ2のクランク軸方向の変形に最も影響する下向きリブ
構造に相当する部分を含んだ外側下部隔壁122の剛性
を確保したので、主軸受キャップ2のクランク軸方向の
変形が効果的に抑制され、しかも、リブ15によってシ
リンダ部62の操縦側の剛性を高めてシリンダ部62の
非操縦側の剛性と同等としたので、シリンダブロック1
0の操縦側に凸となる変形が抑制される。即ち、主軸受
キャップ2の上下方向の変形、主軸受キャップ2のクラ
ンク軸方向の変形、及びシリンダブロック10の操縦側
に凸となる変形が共に抑制される。更に、外側上部隔壁
121及び内側隔壁13の各肉厚を鋳物として最低の肉
厚としたので、前記3種の変形を効果的に抑制しなが
ら、最大の軽量化が図られる。In the cylinder block 10 having the above-described structure, the rigidity of the boss partition wall 11, which most affects the vertical deformation of the main bearing cap 2, is ensured, so that the vertical deformation of the main bearing cap 2 is effectively suppressed. In addition, since the rigidity of the outer lower partition wall 122 including the portion corresponding to the downward rib structure that most affects the deformation of the main bearing cap 2 in the crankshaft direction is secured, the deformation of the main bearing cap 2 in the crankshaft direction is effective. The rigidity of the cylinder portion 62 on the control side is increased by the ribs 15 to be equal to the rigidity of the cylinder portion 62 on the non-control side.
Deformation that is convex on the steering side of 0 is suppressed. That is, the deformation of the main bearing cap 2 in the vertical direction, the deformation of the main bearing cap 2 in the crankshaft direction, and the deformation of the cylinder block 10 that is convex on the steering side are all suppressed. Further, since the thickness of each of the outer upper partition 121 and the inner partition 13 is set to the minimum thickness as a casting, the maximum weight reduction is achieved while effectively suppressing the above three types of deformation.
【0066】(実施形態16)図22は本実施形態のシ
リンダブロック10の横断面略図である。図22におい
て、図8と同一符号は同じ又は相当するものを示す。本
実施形態では、ボス部隔壁11と、外側隔壁12全体即
ち外側上部隔壁121及び外側下部隔壁122の各剛性
を、内側隔壁13に比して高めるとともに、シリンダ部
62の操縦側の剛性を高めてシリンダ部62の非操縦側
の剛性と同等としている。具体的には、内側隔壁13の
肉厚を鋳物として最低の肉厚とし、ボス部隔壁11、外
側上部隔壁121、及び外側下部隔壁122の各肉厚を
それより厚くするとともに、外側上部隔壁121の肉厚
をボス部隔壁11の肉厚の0.5〜1.0倍とし、且つ
外側下部隔壁122の肉厚を主軸受キャップ2の肉厚の
0.5〜1.0倍とし、更に、シリンダ部62の操縦側
の外壁にトップデッキ9からスカート部61上部に至る
リブ15を設けた。リブ15は、ボア間及びジャーナル
間中心に、複数列設けられている。(Embodiment 16) FIG. 22 is a schematic cross-sectional view of a cylinder block 10 of the present embodiment. 22, the same reference numerals as those in FIG. 8 denote the same or corresponding components. In the present embodiment, the rigidity of the boss partition wall 11 and the entire outer partition wall 12, that is, the respective rigidities of the outer upper partition wall 121 and the outer lower partition wall 122 are increased as compared with the inner partition wall 13, and the rigidity of the cylinder portion 62 on the control side is increased. And the rigidity of the cylinder portion 62 on the non-steering side is the same. More specifically, the thickness of the inner partition wall 13 is set to the minimum thickness as a casting, and the thickness of each of the boss partition wall 11, the outer upper partition wall 121, and the outer lower partition wall 122 is made larger than that of the outer upper partition wall 121. Is 0.5 to 1.0 times the thickness of the boss partition 11, and the thickness of the outer lower partition 122 is 0.5 to 1.0 times the thickness of the main bearing cap 2. The rib 15 extending from the top deck 9 to the upper part of the skirt portion 61 is provided on the outer wall on the control side of the cylinder portion 62. A plurality of ribs 15 are provided in the center between the bores and between the journals.
【0067】上記構造のシリンダブロック10では、主
軸受キャップ2の上下方向の変形に最も影響するボス部
隔壁11の剛性を確保するだけでなく、主軸受キャップ
2の上下方向の変形に最も影響する上向きリブ構造に相
当する部分を含んだ外側上部隔壁121の剛性も確保し
たので、主軸受キャップ2の上下方向の変形がより効果
的に抑制され、また、主軸受キャップ2のクランク軸方
向の変形に最も影響する下向きリブ構造に相当する部分
を含んだ外側下部隔壁122の剛性を確保したので、主
軸受キャップ2のクランク軸方向の変形が効果的に抑制
され、しかも、リブ15によってシリンダ部62の操縦
側の剛性を高めてシリンダ部62の非操縦側の剛性と同
等としたので、シリンダブロック10の操縦側に凸とな
る変形が抑制される。即ち、主軸受キャップ2の上下方
向の変形、主軸受キャップ2のクランク軸方向の変形、
及びシリンダブロック10の操縦側に凸となる変形が共
に抑制される。更に、内側隔壁13の肉厚を鋳物として
最低の肉厚としたので、前記3種の変形を効果的に抑制
しながら、最大の軽量化が図られる。In the cylinder block 10 having the above-described structure, not only the rigidity of the boss partition wall 11 which most affects the vertical deformation of the main bearing cap 2 is ensured, but also the vertical deformation of the main bearing cap 2 is most affected. Since the rigidity of the outer upper partition wall 121 including the portion corresponding to the upward rib structure is also ensured, the vertical deformation of the main bearing cap 2 is more effectively suppressed, and the deformation of the main bearing cap 2 in the crankshaft direction. The rigidity of the outer lower partition wall 122 including the portion corresponding to the downward rib structure that has the greatest influence on the axial direction is ensured, so that the deformation of the main bearing cap 2 in the crankshaft direction is effectively suppressed. The rigidity on the control side is increased to be equal to the rigidity on the non-control side of the cylinder portion 62, so that the deformation of the cylinder block 10 that is convex on the control side is suppressed. . That is, the deformation of the main bearing cap 2 in the vertical direction, the deformation of the main bearing cap 2 in the crankshaft direction,
In addition, the deformation of the cylinder block 10 that is convex on the steering side is suppressed. Further, since the thickness of the inner partition wall 13 is made the minimum thickness as a casting, the maximum weight reduction is achieved while effectively suppressing the above three types of deformation.
【0068】(実施形態17)図23は本実施形態のシ
リンダブロック10の横断面略図である。図23におい
て、図8と同一符号は同じ又は相当するものを示す。本
実施形態では、ボス部隔壁11と、外側上部隔壁121
の上部上半部隔壁1211と、外側下部隔壁122の各
剛性を、外側上部隔壁121の上部下半部隔壁1212
及び内側隔壁13に比して高めるとともに、シリンダ部
62の操縦側の剛性を高めてシリンダ部62の非操縦側
の剛性と同等としている。具体的には、上部下半部隔壁
1212及び内側隔壁13の各肉厚を鋳物として最低の
肉厚とし、ボス部隔壁11、上部上半部隔壁1211、
及び外側下部隔壁122の各肉厚をそれより厚くすると
ともに、上部上半部隔壁1211の肉厚をボス部隔壁1
1の肉厚の0.5〜1.0倍とし、且つ外側下部隔壁1
22の肉厚を主軸受キャップ2の肉厚の0.5〜1.0
倍とし、更に、シリンダ部62の操縦側の外壁にトップ
デッキ9からスカート部61上部に至るリブ15を設け
た。リブ15は、ボア間及びジャーナル間中心に、複数
列設けられている。(Embodiment 17) FIG. 23 is a schematic cross-sectional view of a cylinder block 10 of the present embodiment. 23, the same reference numerals as those in FIG. 8 denote the same or corresponding components. In this embodiment, the boss partition 11 and the outer upper partition 121 are provided.
The rigidity of the upper upper partition wall 1211 and the outer lower partition wall 122 is determined by the upper lower partition wall 1212 of the outer upper partition wall 121.
And the rigidity of the cylinder portion 62 on the control side is increased to be equal to the rigidity of the cylinder portion 62 on the non-control side. Specifically, the thickness of each of the upper lower half partition 1212 and the inner partition 13 is set to the minimum thickness as a casting, and the boss partition 11, the upper upper partition 1211,
And the thickness of the outer lower partition wall 122 is made greater than that of the boss partition wall 1.
1 to 0.5 to 1.0 times the thickness of the outer partition wall 1
22 is 0.5 to 1.0 of the thickness of the main bearing cap 2.
The ribs 15 extending from the top deck 9 to the upper part of the skirt 61 are provided on the outer wall on the control side of the cylinder 62. A plurality of ribs 15 are provided in the center between the bores and between the journals.
【0069】上記構造のシリンダブロック10では、主
軸受キャップ2の上下方向の変形に最も影響するボス部
隔壁11の剛性を確保するだけでなく、主軸受キャップ
2の上下方向の変形に最も影響する上向きリブ構造に相
当する部分を含んだ上部上半部隔壁1211の剛性も確
保したので、主軸受キャップ2の上下方向の変形がより
効果的に抑制され、また、主軸受キャップ2のクランク
軸方向の変形に最も影響する下向きリブ構造に相当する
部分を含んだ外側下部隔壁122の剛性を確保したの
で、主軸受キャップ2のクランク軸方向の変形が効果的
に抑制され、しかも、リブ15によってシリンダ部62
の操縦側の剛性を高めてシリンダ部62の非操縦側の剛
性と同等としたので、シリンダブロック10の操縦側に
凸となる変形が抑制される。即ち、主軸受キャップ2の
上下方向の変形、主軸受キャップ2のクランク軸方向の
変形、及びシリンダブロック10の操縦側に凸となる変
形が共に抑制される。更に、上部下半部隔壁1212及
び内側隔壁13の各肉厚を鋳物として最低の肉厚とした
ので、前記3種の変形を効果的に抑制しながら、最大の
軽量化が図られる。しかも、上部上半部隔壁1211の
領域は外側上部隔壁121より小さいので、厚肉化する
部分が実施形態16の場合より少なく、その分だけ、実
施形態16よりも軽量化が図られる。In the cylinder block 10 having the above structure, not only is the rigidity of the boss partition wall 11 most influential on the vertical deformation of the main bearing cap 2 secured, but also the most influential on the vertical deformation of the main bearing cap 2. Since the rigidity of the upper upper half partition 1211 including the portion corresponding to the upward rib structure is also ensured, the deformation of the main bearing cap 2 in the vertical direction is more effectively suppressed, and the main bearing cap 2 in the crankshaft direction. Since the rigidity of the outer lower partition wall 122 including the portion corresponding to the downward rib structure which most affects the deformation of the main bearing cap 2 is secured, the deformation of the main bearing cap 2 in the crankshaft direction is effectively suppressed. Part 62
The rigidity on the control side is increased to be equal to the rigidity on the non-control side of the cylinder portion 62, so that the deformation of the cylinder block 10 that is convex on the control side is suppressed. That is, the deformation of the main bearing cap 2 in the vertical direction, the deformation of the main bearing cap 2 in the crankshaft direction, and the deformation of the cylinder block 10 that is convex on the steering side are all suppressed. Further, since the thickness of each of the upper and lower half partition walls 1212 and the inner partition wall 13 is the minimum thickness as a casting, the maximum weight reduction is achieved while effectively suppressing the above three types of deformation. In addition, since the region of the upper upper partition wall 1211 is smaller than the outer upper partition wall 121, the thickness of the portion is smaller than that of the sixteenth embodiment, and the weight is reduced by that much.
【0070】(実施形態18)本実施形態は、図24に
示すように、実施形態17において、上部上半部隔壁1
211全体の剛性を高める代わりに、その下縁部121
1aのみの剛性を高め、外側下部隔壁122全体の剛性
を高める代わりに、その内側周縁部1221のみの剛性
を高め、その他は実施形態17と同じとしたものであ
る。具体的には、下縁部1211aの肉厚をボス部隔壁
11の肉厚の0.5〜1.0倍とし、内側周縁部122
1の肉厚を主軸受キャップ2の肉厚の0.5〜1.0倍
とした。なお、上部上半部隔壁1211の上側部121
1b及び外側下部隔壁122の外側部1222の各肉厚
は鋳物として最低の肉厚とした。(Embodiment 18) In this embodiment, as shown in FIG.
Instead of increasing the rigidity of the entire 211, its lower edge 121
Instead of increasing the rigidity of only 1a and increasing the rigidity of the entire outer lower partition 122, the rigidity of only the inner peripheral portion 1221 is increased, and the other configuration is the same as that of the seventeenth embodiment. Specifically, the thickness of the lower edge portion 1211a is set to 0.5 to 1.0 times the thickness of the boss partition wall 11, and the inner peripheral portion 122
1 was 0.5 to 1.0 times the thickness of the main bearing cap 2. The upper part 121 of the upper upper half partition 1211 is used.
The thicknesses of the outer wall 122b of the outer lower partition wall 1b and the outer lower partition wall 122 were set to the minimum thickness as a casting.
【0071】これによっても、主軸受キャップ2の上下
方向の変形に最も影響する上向きリブ構造に実質的に相
当する下縁部1211aの剛性を確保し、また、主軸受
キャップ2のクランク軸方向の変形に最も影響する下向
きリブ構造に実質的に相当する内側周縁部1221の剛
性を確保したので、実施形態17と同様の作用効果が発
揮される。しかも、下縁部1211aの領域は上部上半
部隔壁1211より小さく、また、内側周縁部1221
の領域は外側下部隔壁122より小さいので、厚肉化す
る部分が実施形態17の場合より少なく、その分だけ、
実施形態17よりも軽量化が図られる。This also ensures the rigidity of the lower edge portion 1211a substantially corresponding to the upward rib structure that most affects the vertical deformation of the main bearing cap 2 and also allows the main bearing cap 2 to move in the crankshaft direction. Since the rigidity of the inner peripheral portion 1221 substantially corresponding to the downward rib structure that most affects the deformation is secured, the same operation and effect as those of the seventeenth embodiment are exerted. Moreover, the area of the lower edge 1211a is smaller than the upper upper half partition 1211 and the inner peripheral edge 1221a.
Is smaller than the outer lower partition wall 122, so that the portion to be thickened is smaller than in the case of the seventeenth embodiment.
Lighter weight than the seventeenth embodiment is achieved.
【0072】なお、外側上部隔壁121全体の代わりに
下縁部1211aのみの剛性を高め、且つ外側下部隔壁
122全体の代わりに内側周縁部1221のみの剛性を
高めるという前記構造は、実施形態16においても適用
できる。The structure in which the rigidity of only the lower edge 1211a is increased instead of the entire outer upper partition 121 and the rigidity of only the inner peripheral edge 1221 is increased instead of the entire outer lower partition 122 is the same as that of the sixteenth embodiment. Can also be applied.
【0073】(実施形態19)図25は本実施形態のシ
リンダブロック10の横断面略図である。図25におい
て、図8と同一符号は同じ又は相当するものを示す。本
実施形態では、主軸受ボルトボス部B、上部上半部隔壁
1211の下縁部1211a、及び外側下部隔壁122
の内側周縁部1221の各剛性を、内側隔壁13、上部
上半部隔壁1211の上側部1211b、及び外側下部
隔壁122の外側部1222の各剛性に比して高めると
ともに、シリンダ部62の操縦側の剛性を高めてシリン
ダ部62の非操縦側の剛性と同等としている。具体的に
は、シリンダ部62の操縦側の外壁にトップデッキ9か
らスカート部61上部に至るリブ15を設けるととも
に、リブ15に繋げて操縦側の主軸受ボルトボス部Bを
通って主軸受キャップ合わせ面5まで至るリブ161を
設けた。リブ15は、ボア間及びジャーナル間中心に、
複数列設けられており、リブ161と繋がっているリブ
15はジャーナル間中心に設けられたものである。ま
た、非操縦側の主軸受ボルトボス部Bにもリブ161と
対称にリブ162を設けた。また、下縁部1211aの
肉厚をボス部隔壁11の肉厚の0.5〜1.0倍とし、
内側周縁部1221の肉厚を主軸受キャップ2の肉厚の
0.5〜1.0倍とした。なお、上部上半部隔壁121
1の上側部1211b、外側下部隔壁122の外側部1
222、及び内側隔壁13の各肉厚は鋳物として最低の
肉厚とした。(Embodiment 19) FIG. 25 is a schematic cross-sectional view of a cylinder block 10 of the present embodiment. 25, the same symbols as those in FIG. 8 indicate the same or corresponding elements. In the present embodiment, the main bearing bolt boss B, the lower edge 1211a of the upper upper half partition 1211 and the outer lower partition 122
And the rigidity of the inner peripheral portion 1221 of the cylinder portion 62, the upper portion 1211b of the upper upper half partition 1211 and the outer portion 1222 of the outer lower partition 122 are increased. And the rigidity of the cylinder portion 62 on the non-steering side is made equal. Specifically, a rib 15 extending from the top deck 9 to the upper part of the skirt portion 61 is provided on the outer wall on the control side of the cylinder portion 62, and is connected to the rib 15 to pass through the main bearing bolt boss portion B on the control side to fit the main bearing cap. The rib 161 reaching the surface 5 was provided. The rib 15 is located between the bores and between the journals.
The ribs 15 provided in a plurality of rows and connected to the rib 161 are provided at the center between the journals. The rib 162 is also provided symmetrically with the rib 161 on the main bearing bolt boss B on the non-steering side. Further, the thickness of the lower edge portion 1211a is set to 0.5 to 1.0 times the thickness of the boss partition wall 11,
The thickness of the inner peripheral portion 1221 is set to 0.5 to 1.0 times the thickness of the main bearing cap 2. In addition, the upper upper half partition 121
1 upper portion 1211b, outer portion 1 of outer lower partition wall 122
The thickness of each of the inner wall 222 and the inner partition 13 was set to the minimum thickness as a casting.
【0074】上記構造のシリンダブロック10では、リ
ブ15によってシリンダ部62の操縦側の剛性を高めて
シリンダ部62の非操縦側の剛性と同等としたので、シ
リンダブロック10の操縦側に凸となる変形が抑制さ
れ、また、主軸受キャップ2の上下方向の変形に最も影
響する主軸受ボルトボス部Bの剛性をリブ161,16
2によって確保するとともに主軸受キャップ2の上下方
向の変形に最も影響する上向きリブ構造に実質的に相当
する下縁部1211aの剛性を確保したので、主軸受キ
ャップ2の上下方向の変形が効果的に抑制され、しか
も、主軸受キャップ2のクランク軸方向の変形に最も影
響する下向きリブ構造に実質的に相当する内側周縁部1
221の剛性を確保したので、主軸受キャップ2のクラ
ンク軸方向の変形が効果的に抑制される。即ち、主軸受
キャップ2の上下方向の変形、主軸受キャップ2のクラ
ンク軸方向の変形、及びシリンダブロック10の操縦側
に凸となる変形が共に抑制される。更に、上側部121
1b、外側部1222、及び内側隔壁13の各肉厚は鋳
物として最低の肉厚としたので、前記3種の変形を効果
的に抑制しながら、最大の軽量化が図られる。しかも、
リブ15とリブ161とが繋がって形成されるので、製
造作業が容易である。In the cylinder block 10 having the structure described above, the rigidity of the cylinder portion 62 on the control side is increased by the ribs 15 so as to be equal to the rigidity of the cylinder portion 62 on the non-control side. Deformation is suppressed, and the rigidity of the main bearing bolt boss portion B, which most affects the vertical deformation of the main bearing cap 2, is reduced by ribs 161, 16
2 as well as the rigidity of the lower edge portion 1211a substantially corresponding to the upward rib structure that has the greatest influence on the vertical deformation of the main bearing cap 2, so that the vertical deformation of the main bearing cap 2 is effective. And the inner peripheral portion 1 substantially corresponding to the downward rib structure that most affects the deformation of the main bearing cap 2 in the crankshaft direction.
As a result, the deformation of the main bearing cap 2 in the crankshaft direction is effectively suppressed. That is, the deformation of the main bearing cap 2 in the vertical direction, the deformation of the main bearing cap 2 in the crankshaft direction, and the deformation of the cylinder block 10 that is convex on the steering side are all suppressed. Further, the upper part 121
Since the thickness of each of the outer wall 1b, the outer portion 1222, and the inner partition wall 13 is the minimum thickness as a casting, the maximum weight reduction is achieved while effectively suppressing the three types of deformation. Moreover,
Since the rib 15 and the rib 161 are formed so as to be connected, the manufacturing operation is easy.
【0075】(実施形態20)本実施形態は、図26に
示すように、実施形態19において、リブ15を設ける
ことによって剛性を高める代わりに、シリンダ部62の
操縦側のトップデッキ9からスカート部61上部に至る
壁部17に、シリンダ部62の他の部分の構成材料より
ヤング率の高い材料を鋳込むことによって剛性を高め、
リブ161,162を設けることによって主軸受ボルト
ボス部Bの剛性を高める代わりに、及び下縁部1211
aと内側周縁部1221の各肉厚を調節することによっ
て剛性を高める代わりに、ボス部隔壁11、下縁部12
11a、及び内側周縁部1221に、主軸受3回りの他
の隔壁即ち上側部1211b、外側部1222、及び内
側隔壁13の構成材料よりヤング率の高い材料を鋳込む
ことによって剛性を高めたものである。ヤング率の高い
材料は、母材よりヤング率が高い材料であり、例えば母
材がFC材の場合ではFCDやSUSを用いる。(Embodiment 20) In this embodiment, as shown in FIG. 26, instead of increasing the rigidity by providing the ribs 15 in the embodiment 19, instead of increasing the rigidity by providing the ribs 15 from the top deck 9 on the control side of the cylinder portion 62, The rigidity is increased by casting a material having a higher Young's modulus than the constituent material of the other part of the cylinder part 62 into the wall part 17 reaching the upper part of the cylinder part 61,
Instead of increasing the rigidity of the main bearing bolt boss portion B by providing the ribs 161 and 162, and the lower edge portion 1211
Instead of increasing the rigidity by adjusting the thickness of each of the inner peripheral portion 1221 and the inner peripheral portion 1221, the boss portion partition 11 and the lower
The rigidity is increased by casting a material having a higher Young's modulus than the constituent materials of the other partitions around the main bearing 3, that is, the upper portion 1211 b, the outer portion 1222, and the inner partition 13, into the inner peripheral portion 122 a and the inner peripheral portion 122 a. is there. The material having a higher Young's modulus is a material having a higher Young's modulus than the base material. For example, when the base material is an FC material, FCD or SUS is used.
【0076】これによれば、実施形態19と同様の作用
効果が発揮されるとともに、隔壁の構成材料を変質させ
ることによって剛性が高められるので、肉厚を調節する
ことによって剛性を高める実施形態19の場合に比し
て、軽量化が図られる。According to this, the same operation and effect as those of the nineteenth embodiment are exhibited, and the rigidity is increased by altering the constituent material of the partition walls. Therefore, the rigidity is enhanced by adjusting the wall thickness. Lightening is achieved as compared with the case of
【0077】(別の実施形態)実施形態1〜20では、
剛性を高める壁以外の壁の肉厚を鋳物として最低の肉厚
としているが、必ずしも最低としなくてもよい。(Alternative Embodiment) In the first to twentieth embodiments,
Although the thickness of the wall other than the wall for increasing the rigidity is set to the minimum thickness as a casting, it is not always necessary to set the thickness to the minimum.
【0078】[0078]
【発明の効果】請求項1記載の発明によれば、構造(1)
〜(3)の内の少なくとも2つを採用するので、主軸受キ
ャップの上下方向の変形、主軸受キャップ2のクランク
軸方向の変形、シリンダブロックが操縦側に凸となる変
形の内の少なくとも2つを抑制できる。According to the first aspect of the present invention, the structure (1)
Since at least two of (3) are adopted, at least two of the deformation of the main bearing cap in the vertical direction, the deformation of the main bearing cap 2 in the crankshaft direction, and the deformation of the cylinder block protruding toward the control side are adopted. Can be suppressed.
【0079】請求項2記載の発明によれば、主軸受キャ
ップの上下方向の変形を更に効果的に抑制できる。According to the second aspect of the invention, the deformation of the main bearing cap in the vertical direction can be more effectively suppressed.
【0080】請求項3記載の発明によれば、主軸受キャ
ップの上下方向の変形を更に効果的に抑制できる。しか
も、剛性を高める隔壁の領域が請求項2の場合より小さ
いので、肉厚を調節して剛性を高める場合には厚肉化す
る隔壁の領域が請求項2の場合より小さくなり、それ故
に、請求項2の場合より軽量化を図ることができる。According to the third aspect of the invention, the deformation of the main bearing cap in the vertical direction can be more effectively suppressed. Moreover, since the area of the partition wall for increasing the rigidity is smaller than that of the second aspect, when the thickness is adjusted to increase the rigidity, the area of the partition wall to be thickened is smaller than that of the second aspect. The weight can be reduced as compared with the case of the second aspect.
【0081】請求項4記載の発明によれば、リブによっ
て剛性を高めるので、製造作業を容易なものにできる。According to the fourth aspect of the present invention, since the rigidity is increased by the rib, the manufacturing operation can be simplified.
【0082】請求項5記載の発明によれば、リブを形成
するだけで、前記構造(1)及び(3)を実現できるので、製
造作業を容易なものにできる。According to the fifth aspect of the present invention, since the structures (1) and (3) can be realized only by forming the ribs, the manufacturing operation can be simplified.
【0083】請求項6記載の発明によれば、肉厚の調節
によって剛性を高めるので、製造作業を容易なものにで
きる。According to the sixth aspect of the invention, since the rigidity is increased by adjusting the thickness, the manufacturing operation can be simplified.
【0084】請求項7記載の発明によれば、剛性を高く
できるとともに軽量化も図ることができる。According to the seventh aspect of the invention, the rigidity can be increased and the weight can be reduced.
【0085】請求項8記載の発明によれば、剛性を高く
できるとともに軽量化も図ることができる。According to the eighth aspect of the invention, the rigidity can be increased and the weight can be reduced.
【0086】請求項9記載の発明によれば、隔壁の構成
材料を変質させることによって剛性を高めるので、肉厚
を調節することによって剛性を高める場合に比して、軽
量化を図ることができる。According to the ninth aspect of the present invention, since the rigidity is increased by altering the material of the partition walls, the weight can be reduced as compared with the case where the rigidity is increased by adjusting the wall thickness. .
【0087】請求項10記載の発明によれば、シリンダ
部の構成材料を変質させることによって剛性を高めるの
で、リブを設けることによって剛性を高める場合に比し
て、軽量化を図ることができる。According to the tenth aspect of the present invention, since the rigidity is increased by altering the material of the cylinder portion, the weight can be reduced as compared with the case where the rigidity is increased by providing the ribs.
【0088】請求項11記載の発明によれば、シリンダ
ブロックの変形を抑制しながら、最大の軽量化を図るこ
とができる。According to the eleventh aspect, maximum weight reduction can be achieved while suppressing deformation of the cylinder block.
【図1】 クランク軸から加わる機械的荷重を示すクラ
ンク軸方向断面図である。FIG. 1 is a sectional view in the crankshaft direction showing a mechanical load applied from a crankshaft.
【図2】 主軸受回りの上部隔壁を説明するためのシリ
ンダブロックの模式横断面図である。FIG. 2 is a schematic cross-sectional view of a cylinder block for explaining an upper partition wall around a main bearing.
【図3】 クランク軸から加わる機械的荷重を示すクラ
ンク軸方向断面図である。FIG. 3 is a sectional view in the direction of the crankshaft showing a mechanical load applied from the crankshaft.
【図4】 主軸受キャップのクランク軸方向の変形を説
明するためのシリンダブロックの模式横断面図である。FIG. 4 is a schematic cross-sectional view of a cylinder block for explaining deformation of a main bearing cap in a crankshaft direction.
【図5】 主軸受回りのリブ構造を説明するためのシリ
ンダブロックの模式横断面図である。FIG. 5 is a schematic cross-sectional view of a cylinder block for explaining a rib structure around a main bearing.
【図6】 シリンダブロックの操縦側及び非操縦側にお
ける上下変形量の差を説明するためのシリンダブロック
の横断面図である。FIG. 6 is a cross-sectional view of the cylinder block for explaining a difference in vertical deformation between the control side and the non-control side of the cylinder block.
【図7】 主軸受回りのリブ構造を説明するためのシリ
ンダブロックの模式横断面図である。FIG. 7 is a schematic cross-sectional view of a cylinder block for explaining a rib structure around a main bearing.
【図8】 実施形態1のシリンダブロックの横断面略図
である。FIG. 8 is a schematic cross-sectional view of the cylinder block of the first embodiment.
【図9】 実施形態2のシリンダブロックの横断面略図
である。FIG. 9 is a schematic cross-sectional view of a cylinder block according to a second embodiment.
【図10】 実施形態3のシリンダブロックの横断面略
図である。FIG. 10 is a schematic cross-sectional view of a cylinder block according to a third embodiment.
【図11】 実施形態4のシリンダブロックの横断面略
図である。FIG. 11 is a schematic cross-sectional view of a cylinder block according to a fourth embodiment.
【図12】 実施形態5のシリンダブロックの横断面略
図である。FIG. 12 is a schematic cross-sectional view of a cylinder block according to a fifth embodiment.
【図13】 実施形態7のシリンダブロックの横断面略
図である。FIG. 13 is a schematic cross-sectional view of a cylinder block according to a seventh embodiment.
【図14】 実施形態8のシリンダブロックの横断面略
図である。FIG. 14 is a schematic cross-sectional view of a cylinder block according to an eighth embodiment.
【図15】 実施形態9のシリンダブロックの横断面略
図である。FIG. 15 is a schematic cross-sectional view of a cylinder block according to a ninth embodiment.
【図16】 実施形態10のシリンダブロックの横断面
略図である。FIG. 16 is a schematic cross-sectional view of a cylinder block according to a tenth embodiment.
【図17】 実施形態11のシリンダブロックの横断面
略図である。FIG. 17 is a schematic cross-sectional view of a cylinder block according to an eleventh embodiment.
【図18】 実施形態12のシリンダブロックの横断面
略図である。FIG. 18 is a schematic cross-sectional view of a cylinder block according to a twelfth embodiment.
【図19】 実施形態13のシリンダブロックの横断面
略図である。FIG. 19 is a schematic cross-sectional view of a cylinder block according to a thirteenth embodiment.
【図20】 実施形態14のシリンダブロックの横断面
略図である。FIG. 20 is a schematic cross-sectional view of a cylinder block according to a fourteenth embodiment.
【図21】 実施形態15のシリンダブロックの横断面
略図である。FIG. 21 is a schematic cross-sectional view of a cylinder block according to a fifteenth embodiment.
【図22】 実施形態16のシリンダブロックの横断面
略図である。FIG. 22 is a schematic cross-sectional view of a cylinder block according to a sixteenth embodiment.
【図23】 実施形態17のシリンダブロックの横断面
略図である。FIG. 23 is a schematic cross-sectional view of a cylinder block according to a seventeenth embodiment.
【図24】 実施形態18のシリンダブロックの横断面
略図である。FIG. 24 is a schematic cross-sectional view of a cylinder block according to an eighteenth embodiment.
【図25】 実施形態19のシリンダブロックの横断面
略図である。FIG. 25 is a schematic cross-sectional view of a cylinder block according to a nineteenth embodiment.
【図26】 実施形態20のシリンダブロックの横断面
略図である。FIG. 26 is a schematic cross-sectional view of a cylinder block according to a twentieth embodiment.
2 主軸受キャップ 3 主軸受 4 ロアデッキ 5 主軸受キャップ合わせ面 61 スカート部 62 シリンダ部 7 オイルパン合わせ面 81 カム室 82 リブ 9 トップデッキ 10 シリンダブロック 11 ボス部隔壁 12 外側隔壁 121 外側上部隔壁 1211 上部上半部隔壁 1211a 下縁部 1211b 上側部 1212 上部下半部隔壁 122 外側下部隔壁 1221 内側周縁部 1222 外側部 13 内側隔壁 15 リブ 161,162 リブ 17 壁部 2 Main bearing cap 3 Main bearing 4 Lower deck 5 Main bearing cap mating surface 61 Skirt portion 62 Cylinder portion 7 Oil pan mating surface 81 Cam chamber 82 Rib 9 Top deck 10 Cylinder block 11 Boss partition 12 Outer partition 121 Outer upper partition 1211 Upper part Upper half partition 1211a Lower edge 1211b Upper part 1212 Upper lower half partition 122 Outer lower partition 1221 Inner peripheral part 1222 Outer part 13 Inner partition 15 Ribs 161 and 162 Ribs 17 Wall
Claims (11)
とを特徴とするシリンダブロック高剛性構造。 (1)主軸受回りの上部隔壁の内、少なくとも主軸受ボル
トボス部の剛性を、主軸受回りの上部隔壁の内の他の隔
壁に比して高めた。 (2)主軸受回りの隔壁の内、主軸受キャップ合わせ面か
らオイルパン合わせ面にかけての隔壁の剛性を、主軸受
回りの隔壁の内の他の隔壁に比して高めた。 (3)シリンダ部の操縦側の剛性を高めて、カム室及びそ
れを支持するリブを備えたシリンダ部の非操縦側の剛性
と同等とした。1. A highly rigid structure for a cylinder block, wherein at least two of the following structures (1) to (3) are employed in the cylinder block. (1) The rigidity of at least the main bearing bolt boss portion of the upper partition wall around the main bearing is increased as compared with the other partition walls of the upper partition wall around the main bearing. (2) Among the bulkheads around the main bearing, the rigidity of the bulkhead from the mating surface of the main bearing cap to the mating surface of the oil pan is increased as compared with the other bulkheads around the main bearing. (3) The rigidity of the cylinder section on the control side is increased to be equal to the rigidity of the cylinder section having the cam chamber and the rib supporting the cam chamber on the non-control side.
主軸受回りで主軸受ボルトボス部の外側の隔壁の内、ロ
アデッキから主軸受キャップ合わせ面にかけての隔壁の
剛性を、前記外側の隔壁の内の他の隔壁に比して高めた
請求項1記載のシリンダブロック高剛性構造。2. When the structure (1) is adopted,
2. The partition according to claim 1, wherein the rigidity of the partition between the lower deck and the main bearing cap mating surface of the partition outside the main bearing bolt boss around the main bearing is increased as compared with the other partitions among the outer partition. High rigidity cylinder block structure.
主軸受回りで主軸受ボルトボス部の外側の隔壁の内、ロ
アデッキから主軸受キャップ合わせ面にかけての隔壁で
あって、主軸受キャップ合わせ面から上向き45度以上
の隔壁の剛性を、前記外側の隔壁の内の他の隔壁に比し
て高めた請求項1記載のシリンダブロック高剛性構造。3. When the structure (1) is adopted,
Of the bulkheads outside the main bearing bolt boss around the main bearing, the bulkhead is from the lower deck to the main bearing cap mating surface, and has a rigidity of the bulkhead of 45 degrees or more upward from the main bearing cap mating surface, The high rigidity structure of the cylinder block according to claim 1, wherein the structure is higher than other partition walls in the cylinder block.
シリンダ部の操縦側の外壁に、トップデッキからスカー
ト部上部に至る上下方向のリブを設け、これによって剛
性を高めた請求項1記載のシリンダブロック高剛性構
造。4. When the structure (3) is adopted,
2. The cylinder block high rigidity structure according to claim 1, wherein a vertical rib extending from a top deck to an upper part of the skirt is provided on an outer wall on the control side of the cylinder to thereby increase rigidity.
た場合において、シリンダ部の操縦側の外壁に、トップ
デッキからスカート部上部に至る上下方向のリブを設
け、これによって前記構造(3)における剛性を高め、該
リブに繋げて操縦側の主軸受ボルトボス部を通って主軸
受キャップ合わせ面まで至るリブを設けるとともに、非
操縦側の主軸受ボルトボス部を通って主軸受キャップ合
わせ面まで至るリブを設け、これによって前記(1)にお
ける剛性を高めた請求項1記載のシリンダブロック高剛
性構造。5. In a case where at least the structures (1) and (3) are adopted, a vertical rib extending from a top deck to an upper part of a skirt portion is provided on an outer wall on the control side of the cylinder portion, whereby the structure ( The rigidity in 3) is increased, and a rib is provided connecting the rib to the main bearing cap boss portion through the main bearing bolt boss portion on the steering side, and the main bearing cap mating surface through the main bearing bolt boss portion on the non-control side. 2. The cylinder block high rigidity structure according to claim 1, wherein ribs are provided to extend the rigidity in (1).
いて、肉厚を調節することによって剛性を高めた請求項
1記載のシリンダブロック高剛性構造。6. The cylinder block high rigidity structure according to claim 1, wherein when the structure (1) or (2) is adopted, the rigidity is increased by adjusting the wall thickness.
主軸受ボルトボス部の肉厚の0.5〜1.0倍の肉厚と
することによって剛性を高めた請求項2又は3に記載の
シリンダブロック高剛性構造。7. When the structure (1) is adopted,
The cylinder block high rigidity structure according to claim 2 or 3, wherein the rigidity is enhanced by making the thickness of the main bearing bolt boss part 0.5 to 1.0 times the thickness.
主軸受キャップの肉厚の0.5〜1.0倍の肉厚とする
ことによって剛性を高めた請求項1記載のシリンダブロ
ック高剛性構造。8. When the structure (2) is adopted,
2. The cylinder block high rigidity structure according to claim 1, wherein the rigidity is increased by making the thickness of the main bearing cap 0.5 to 1.0 times the thickness.
いて、前記他の隔壁の構成材料よりヤング率の高い材料
を鋳込むことによって剛性を高めた請求項1記載のシリ
ンダブロック高剛性構造。9. The cylinder block height according to claim 1, wherein when the structure (1) or (2) is adopted, the rigidity is increased by casting a material having a higher Young's modulus than the constituent material of the other partition. Rigid structure.
て、シリンダ部の操縦側のトップデッキからスカート部
上部に至る壁部に、シリンダ部の他の部分の構成材料よ
りヤング率の高い材料を鋳込むことによって剛性を高め
た請求項1記載のシリンダブロック高剛性構造。10. In the case where the structure (3) is adopted, a material having a Young's modulus higher than that of the other parts of the cylinder portion is applied to a wall portion extending from the top deck on the control side of the cylinder portion to the upper portion of the skirt portion. The cylinder block high rigidity structure according to claim 1, wherein the rigidity is increased by casting.
おいて、前記他の隔壁の肉厚を、鋳物としての最低の肉
厚とした請求項1記載のシリンダブロック高剛性構造。11. The cylinder block high rigidity structure according to claim 1, wherein in the case where the structure (1) or (2) is adopted, the thickness of the other partition wall is a minimum thickness as a casting.
Priority Applications (1)
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JP10351266A JP2000170603A (en) | 1998-12-10 | 1998-12-10 | Cylinder block high rigidity structure |
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JP10351266A JP2000170603A (en) | 1998-12-10 | 1998-12-10 | Cylinder block high rigidity structure |
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JP10351266A Pending JP2000170603A (en) | 1998-12-10 | 1998-12-10 | Cylinder block high rigidity structure |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2228530A1 (en) * | 2009-03-13 | 2010-09-15 | Ford Global Technologies, LLC | Crankcase for a piston engine |
CN110425055A (en) * | 2019-08-27 | 2019-11-08 | 浙江义利汽车零部件有限公司 | Vehicle crank shaft case and vehicle |
-
1998
- 1998-12-10 JP JP10351266A patent/JP2000170603A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2228530A1 (en) * | 2009-03-13 | 2010-09-15 | Ford Global Technologies, LLC | Crankcase for a piston engine |
CN110425055A (en) * | 2019-08-27 | 2019-11-08 | 浙江义利汽车零部件有限公司 | Vehicle crank shaft case and vehicle |
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