JPH05126257A - Cylinder head gasket - Google Patents
Cylinder head gasketInfo
- Publication number
- JPH05126257A JPH05126257A JP32007491A JP32007491A JPH05126257A JP H05126257 A JPH05126257 A JP H05126257A JP 32007491 A JP32007491 A JP 32007491A JP 32007491 A JP32007491 A JP 32007491A JP H05126257 A JPH05126257 A JP H05126257A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder head
- combustion chamber
- head gasket
- seal member
- bead
- 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.)
- Granted
Links
Landscapes
- Gasket Seals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は内燃機関のシリンダヘッ
ドとシリンダブロックとの間に介装するシリンダヘッド
ガスケットに関し、特に金属製の基板に燃焼室孔を穿設
しその周囲にビードを形成すると共に、ビードの外周裾
縁に沿ってシール部材を設けたシリンダヘッドガスケッ
トに係る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder head gasket interposed between a cylinder head and a cylinder block of an internal combustion engine, and more particularly, a combustion chamber hole is formed in a metal substrate and a bead is formed around the combustion chamber hole. In addition, the present invention relates to a cylinder head gasket provided with a seal member along the outer peripheral hem of the bead.
【０００２】[0002]
【従来の技術】内燃機関のシリンダヘッドとシリンダブ
ロックとの間に介装されるシリンダヘッドガスケットに
関し、近時は金属製の板材から成るシリンダヘッドガス
ケットが注目されている。例えば、金属製の基板に燃焼
ガスが通過する複数の燃焼室孔を穿設し、各々の燃焼室
孔の周囲にビードを形成して接合部材に対し高い面圧を
確保し得るようにしたものが知られている。2. Description of the Related Art With respect to a cylinder head gasket interposed between a cylinder head and a cylinder block of an internal combustion engine, a cylinder head gasket made of a metal plate material has recently attracted attention. For example, a plurality of combustion chamber holes through which combustion gas passes are formed in a metal substrate, and a bead is formed around each combustion chamber hole so that a high surface pressure can be secured for the joining member. It has been known.
【０００３】このようなシリンダヘッドガスケットに関
し、例えば実開昭６４−８５５６号公報には、ビードの
水孔側のつけ根部に軟質のシール部材を配設し水の浸透
による腐食を防止するようにしたシリンダヘッドガスケ
ットが開示されている。また、実開平１−１４１３５４
号公報にもビードの周囲に沿ってその全周又は一部に耐
熱性の弾性部材層を形成したシリンダヘッド用金属ガス
ケットが開示されている。更に、実公平２−３５０８６
号公報には、金属ガスケット基板のビード部分の頂部、
基部に作用する相手面の接触面圧の大小に応じて密封材
料の塗着の厚み、幅を変更し、密封材料をスクリーン印
刷法で塗着することによりビード部分の所期のシール圧
を維持し、高価な密封材料を節約することが提案されて
いる。Regarding such a cylinder head gasket, for example, in Japanese Utility Model Laid-Open No. 64-8556, a soft seal member is provided at the base of the bead on the water hole side to prevent corrosion due to water penetration. Cylinder head gaskets are disclosed. Moreover, the actual Kaihei 1-141354
The publication also discloses a metal gasket for a cylinder head in which a heat-resistant elastic member layer is formed on the entire circumference or a part of the circumference of the bead. In addition, the actual fair 2-35086
In the publication, the top of the bead portion of the metal gasket substrate,
The desired sealing pressure at the bead is maintained by changing the thickness and width of the sealing material applied according to the magnitude of the contact surface pressure of the mating surface acting on the base and applying the sealing material by screen printing. However, it has been proposed to save expensive sealing material.
【０００４】[0004]
【発明が解決しようとする課題】上記実開昭６４−８５
５６号公報に記載のシリンダヘッドガスケットにおいて
は、ビードのつけ根部即ち裾縁にシール部材が設けられ
ているので燃焼ガスに対してもシール性が向上する。然
し乍ら近時の内燃機関の高出力化、小型化等に伴ない、
基板に穿設された相互に隣接する燃焼室孔の間の距離即
ち中間部の幅が短かくなり、両者間のシール性の確保が
重要課題となっている。このため、例えばビードについ
ては、隣接する燃焼室孔の各々を囲繞するビードを中間
部で集合させ略同一幅のビードとすることにより所定の
面圧を確保するようにされているが、上記シール部材に
ついても、上記隣接する燃焼室孔の間の中間部を含み各
々の燃焼室孔の全周に亘り略均等の面圧を確保すること
が望まれる。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Saikai 64-85
In the cylinder head gasket described in Japanese Patent Publication No. 56, a seal member is provided at the root of the bead, that is, the hem edge, so that the sealability against combustion gas is improved. However, with the recent increase in output and downsizing of internal combustion engines,
The distance between the combustion chamber holes adjacent to each other formed in the substrate, that is, the width of the intermediate portion becomes short, and it is an important issue to secure the sealing property between the both. For this reason, for example, regarding a bead, the beads surrounding each of the adjacent combustion chamber holes are gathered at an intermediate portion to form a bead having substantially the same width so as to ensure a predetermined surface pressure. As for the members, it is desired to secure a substantially uniform surface pressure over the entire circumference of each combustion chamber hole including the intermediate portion between the adjacent combustion chamber holes.
【０００５】また、燃焼室孔の周囲に複数のボルト孔が
穿設され、これらのボルト孔を介してボルトが挿通され
てシリンダヘッドとシリンダブロックとの間に緊締され
るシリンダヘッドガスケットにおいては、ボルト孔近傍
は他の部分に比し大きな軸力が加えられ面圧が大とな
る。前掲の実公平２−３５０８６号公報には、ビード部
分に付着する密封材料の厚さ等を変更してビード部分の
所期のシール圧を維持する旨記載されているが、ビード
の外周裾縁に設けるシール部材自体の面圧分布の均一化
を図ったものではなく、また上述のようなシリンダヘッ
ドガスケットのシール部材に特有の面圧分布に鑑みた対
応がなされたものでもない。Further, in a cylinder head gasket in which a plurality of bolt holes are bored around the combustion chamber hole and bolts are inserted through these bolt holes and tightened between the cylinder head and the cylinder block, A large axial force is applied in the vicinity of the bolt holes as compared with other parts, and the surface pressure becomes large. The above-mentioned Japanese Utility Model Publication No. 2-35086 describes that the thickness of the sealing material adhered to the bead portion is changed to maintain the desired sealing pressure at the bead portion. It is not intended that the surface pressure distribution of the seal member itself provided in the above is uniformed, nor is the countermeasure taken in consideration of the surface pressure distribution peculiar to the seal member of the cylinder head gasket as described above.
【０００６】更に、シリンダヘッドガスケットにおいて
は、これが装着される内燃機関のシリンダヘッド及びシ
リンダブロック間の締結力の分布に応じた面圧分布とす
ることが望ましいことは言うまでもない。上記締結力の
分布に関し、シリンダヘッドの長手方向では前後部分を
除き各燃焼室孔回りは略同一の締結力分布となるが、幅
方向では吸気側と排気側とで異なる締結力分布となる場
合がある。このような場合には、シリンダヘッドガスケ
ットに対し、シール部材を前後、左右何れにも対称な面
圧分布となるように形成するのではなく、シール部材の
厚さを締結力分布に応じて吸気側と排気側とで異なるよ
うにすればシール性が一層向上することとなる。Further, it goes without saying that it is desirable for the cylinder head gasket to have a surface pressure distribution corresponding to the distribution of the fastening force between the cylinder head and the cylinder block of the internal combustion engine to which it is mounted. Regarding the distribution of the fastening force, in the longitudinal direction of the cylinder head, the fastening force distribution is the same around each combustion chamber hole except for the front and rear portions, but the fastening force distribution is different between the intake side and the exhaust side in the width direction. There is. In such a case, the seal member is not formed on the cylinder head gasket so as to have a symmetrical surface pressure distribution both in the front and rear and in the left and right, and the thickness of the seal member is adjusted according to the fastening force distribution. If the side and the exhaust side are made different, the sealing property will be further improved.
【０００７】そこで、本発明は金属製の基板に燃焼ガス
が通過する複数の燃焼室孔を穿設し各燃焼室孔の周囲に
ビードを形成すると共に、各々のビードの凸部側の外周
裾縁に沿ってシール部材を設けたシリンダヘッドガスケ
ットにおいて、シール部材に対し各燃焼室孔の全周に亘
り略均等の面圧を確保し、シール性の一層の向上を図る
ことを目的とする。Therefore, according to the present invention, a plurality of combustion chamber holes through which combustion gas passes are formed in a metal substrate to form a bead around each combustion chamber hole, and an outer peripheral hem of each bead on the convex portion side. An object of the present invention is to provide a cylinder head gasket having a seal member along the edge thereof, to secure a substantially uniform surface pressure to the seal member over the entire circumference of each combustion chamber hole, and to further improve the sealing property.
【０００８】[0008]
【課題を解決するための手段】上記の目的を達成するた
め、本発明は、金属製の基板に燃焼ガスが通過する複数
の燃焼室孔を一列に穿設すると共に、該複数の燃焼室孔
回りに複数のボルト孔を穿設し、前記複数の燃焼室孔の
各々の周囲にビードを形成すると共に、該ビードの各々
の凸部側の外周裾縁に沿って連続するシール部材を設け
たシリンダヘッドガスケットにおいて、前記基板の長手
方向に対し左右方向の少くとも一方側の前記シール部材
の厚さを、前記複数のボルト孔が相互に隣接するボルト
孔間に位置する部分とその他の部分とで異なる値とした
ものである。In order to achieve the above-mentioned object, the present invention provides a plurality of combustion chamber holes through which a combustion gas passes through a metal substrate and the plurality of combustion chamber holes. A plurality of bolt holes were drilled around, a bead was formed around each of the plurality of combustion chamber holes, and a continuous seal member was provided along the outer peripheral hem on the convex side of each bead. In the cylinder head gasket, the thickness of the sealing member on at least one side in the left-right direction with respect to the longitudinal direction of the substrate is set so that the plurality of bolt holes are located between bolt holes adjacent to each other and other portions. It is a different value.
【０００９】前記シリンダヘッドガスケットの前記基板
の長手方向に対し左右方向の一方側の前記シール部材の
厚さに関し、前記ボルト孔間の中央部分を最大値に設定
し、前記複数の燃焼室孔が相互に隣接する中間部に対峙
する部分を前記ボルト孔間の中央部分より小さく設定
し、前記ボルト孔の近傍部分を最小値に設定するとよ
い。With respect to the thickness of the sealing member on one side in the left-right direction with respect to the longitudinal direction of the substrate of the cylinder head gasket, the central portion between the bolt holes is set to the maximum value, and the plurality of combustion chamber holes are It is preferable that a portion facing the intermediate portions adjacent to each other is set smaller than a central portion between the bolt holes, and a portion in the vicinity of the bolt holes is set to a minimum value.
【００１０】更に、前記シリンダヘッドガスケットの前
記基板の長手方向に対し左右方向の他方側の前記シール
部材の厚さに関し、前記複数の燃焼室孔が相互に隣接す
る中間部に対峙する部分を最大値に設定することとして
もよい。Further, regarding the thickness of the sealing member on the other side in the left-right direction with respect to the longitudinal direction of the substrate of the cylinder head gasket, the maximum portion where the plurality of combustion chamber holes face the mutually adjacent intermediate portions is maximized. It may be set to a value.
【００１１】[0011]
【作用】上記の構成になるシリンダヘッドガスケット
を、シリンダヘッドとシリンダブロックとの間に介装
し、所定の締付力を以って両者を締結すると、ビードが
圧縮されて変形し、これらの圧縮変形されたビードの弾
性復元力によりシリンダヘッド及びシリンダブロックに
対する所定の面圧が確保されると共に、シール部材が何
れか一方に密着し、両者間がシールされる。この場合に
おいて、基板の長手方向に対し左右方向の少くとも一方
側のシール部材の厚さに関し、複数のボルト孔が相互に
隣接するボルト孔間に位置する部分とその他の部分とで
異なる値とされているので、シール部材の全周に亘り略
均等の面圧が得られる。When the cylinder head gasket having the above structure is interposed between the cylinder head and the cylinder block and both are fastened with a predetermined tightening force, the bead is compressed and deformed. A predetermined surface pressure on the cylinder head and the cylinder block is ensured by the elastic restoring force of the bead that has been compressed and deformed, and at the same time, the seal member is brought into close contact with either one to seal between them. In this case, with respect to the thickness of the seal member on at least one side in the left-right direction with respect to the longitudinal direction of the substrate, a value different between a portion where a plurality of bolt holes are located between mutually adjacent bolt holes and another portion Therefore, a substantially uniform surface pressure can be obtained over the entire circumference of the seal member.
【００１２】更に、シリンダヘッドガスケットの基板の
長手方向に対し左右方向の一方側のシール部材の厚さに
関し、ボルト孔間の中央部分を最大値に設定し、複数の
燃焼室孔が相互に隣接する中間部に対峙する部分をボル
ト孔間の中央部分より小さく設定し、ボルト孔の近傍部
分を最小値に設定すると共に、基板の長手方向に対し左
右方向の他方側のシール部材の厚さに関し、複数の燃焼
室孔が相互に隣接する中間部に対峙する部分を最大値に
設定したシリンダヘッドガスケットによれば、シリンダ
ヘッドガスケットに加えられる締結力の分布が基板の長
手方向に対し左右方向で異なる場合にも各燃焼室孔のシ
ール部材の全周に亘り実質的に均一の面圧分布が得られ
一層良好なシール性が得られる。Further, regarding the thickness of the seal member on one side in the left-right direction with respect to the longitudinal direction of the substrate of the cylinder head gasket, the central portion between the bolt holes is set to the maximum value, and the plurality of combustion chamber holes are adjacent to each other. Set the part facing the intermediate part smaller than the central part between the bolt holes, set the part near the bolt hole to the minimum value, and set the thickness of the seal member on the other side in the left-right direction with respect to the longitudinal direction of the substrate. According to a cylinder head gasket in which a plurality of combustion chamber holes are located at the maximum value in a portion facing the mutually adjacent intermediate portion, the distribution of the fastening force applied to the cylinder head gasket is distributed in the left-right direction with respect to the longitudinal direction of the substrate. Even when they are different, a substantially uniform surface pressure distribution is obtained over the entire circumference of the seal member of each combustion chamber hole, and a better sealing property is obtained.
【００１３】[0013]
【実施例】以下、本発明のシリンダヘッドガスケットの
実施例を図面を参照して説明する。図１は本発明の一実
施例に係る、多気筒内燃機関のシリンダヘッドとシリン
ダブロックとの間に介装されるシリンダヘッドガスケッ
トを示すもので、弾性金属板、例えばステンレス鋼板
（ＳＵＳ）の基板１０を有し、この基板１０に気筒数に
対応する数、例えば図１に示すように直列四気筒の内燃
機関用として四個の燃焼室孔１１が直線上に穿設されて
いる。また、基板１０には複数の冷却水孔（図示せず）
及び潤滑油孔（図示せず）が穿設され、燃焼室孔１１の
周囲に複数のボルト孔１２が穿設されている。Embodiments of the cylinder head gasket of the present invention will be described below with reference to the drawings. FIG. 1 shows a cylinder head gasket interposed between a cylinder head and a cylinder block of a multi-cylinder internal combustion engine according to an embodiment of the present invention, which is an elastic metal plate, for example, a stainless steel plate (SUS) substrate. The substrate 10 has a number corresponding to the number of cylinders, for example, as shown in FIG. 1, four combustion chamber holes 11 are bored in a straight line for an in-line four-cylinder internal combustion engine. Further, the substrate 10 has a plurality of cooling water holes (not shown).
Further, a lubricating oil hole (not shown) is formed, and a plurality of bolt holes 12 are formed around the combustion chamber hole 11.
【００１４】更に、各燃焼室孔１１回りには、図２に明
らかなようにビード１３が形成されている。ビード１３
は各燃焼室孔１１の全周に亘り夫々同一幅に形成されて
いるが、隣接する燃焼室孔１１，１１間に位置する部分
では合流して一つのビードとなっている。ボルト孔１２
は各燃焼室孔１１の周囲に略均等な間隔で例えば計十個
形成され、組付時には図１の上方側が内燃機関の吸気側
となるように配置された後、各々に締結ボルト（図示せ
ず）が挿通され、シリンダヘッド（図示せず）及びシリ
ンダブロック（図示せず）間に緊締される。Further, a bead 13 is formed around each combustion chamber hole 11 as shown in FIG. Bead 13
Are formed to have the same width over the entire circumference of each combustion chamber hole 11, but they merge into a bead at the portion located between the adjacent combustion chamber holes 11, 11. Bolt hole 12
For example, ten in total are formed around each combustion chamber hole 11 at substantially equal intervals, and when assembled, the upper side of FIG. 1 is arranged to be the intake side of the internal combustion engine, and then fastening bolts (not shown) are attached to each. No.) is inserted and tightened between a cylinder head (not shown) and a cylinder block (not shown).
【００１５】基板１０のビード１３の凸部側のビード１
３から燃焼室孔１１に至るまでの平坦面には、所定幅の
真円の金属環、例えばステンレス鋼板のスペーサ、所謂
シムリング１４が接合されている。即ち、シムリング１
４は、それ自体によるシール機能を確保するに充分な所
定幅に設定されると共に、図２に示すようにビード１３
の高さより薄く設定され、例えばパルス駆動のレーザ溶
接機により全周に亘り実質的に連続して基板１０に溶接
されている。これにより、図２に示すようにシムリング
１４の全周に連続した溶接部１５が形成されている。The bead 1 on the convex side of the bead 13 of the substrate 10
On the flat surface from 3 to the combustion chamber hole 11, a perfect circular metal ring having a predetermined width, for example, a spacer made of a stainless steel plate, a so-called shim ring 14 is joined. That is, shim ring 1
4 is set to a predetermined width sufficient to secure the sealing function by itself, and the bead 13 is set as shown in FIG.
Is set thinner than the height of the substrate 10 and is welded to the substrate 10 substantially continuously over the entire circumference by, for example, a pulse driving laser welding machine. As a result, as shown in FIG. 2, a continuous welded portion 15 is formed on the entire circumference of the shim ring 14.
【００１６】そして、ビード１３の凸部側の外周裾縁に
沿って、例えば加硫フッ素系ゴムのシール部材１６が形
成されている。図３は隣接するビード１３，１３が集合
する集合部１３ｃ近傍を図１の上方側即ち吸気側からみ
た側面を示すもので、シール部材１６に関し、ボルト孔
１２，１２間の中央部分Ａの厚さＴａが最大値に設定さ
れ、燃焼室孔１１，１１が相互に隣接する中間部に対峙
する部分Ｂの厚さＴｂが、最大厚さＴａより小さく設定
されている。そして、ボルト孔１２の近傍部分Ｄの厚さ
Ｔｄが最小値に設定され、従って残りの部分Ｃの厚さＴ
ｃが厚さＴｂとＴｄの中間値に設定されている。シール
部材１６の最大厚さＴａは、シムリング１４の厚さと同
等か若干大きく設定するとよい。尚、各部分Ａ乃至Ｄの
形状は図３に示すように滑らかな山形に形成するのが望
ましいが、段差を以って階段状に形成することとしても
よい。A seal member 16 of, for example, vulcanized fluorinated rubber is formed along the outer peripheral hem on the convex side of the bead 13. FIG. 3 is a side view of the vicinity of the gathering portion 13c where the adjacent beads 13 are gathered, as viewed from the upper side of FIG. 1, that is, the intake side. Regarding the seal member 16, the thickness of the central portion A between the bolt holes 12 and 12 is shown. The thickness Ta is set to the maximum value, and the thickness Tb of the portion B where the combustion chamber holes 11 and 11 face the mutually adjacent intermediate portions is set to be smaller than the maximum thickness Ta. Then, the thickness Td of the portion D near the bolt hole 12 is set to the minimum value, and therefore the thickness Td of the remaining portion C is set.
c is set to an intermediate value between the thicknesses Tb and Td. The maximum thickness Ta of the seal member 16 may be set to be equal to or slightly larger than the thickness of the shim ring 14. The shape of each of the portions A to D is preferably formed in a smooth mountain shape as shown in FIG. 3, but it may be formed in a step shape with a step.
【００１７】而して、シール部材１６の各部分Ａ乃至Ｄ
の厚さＴａ乃至Ｔｄは、図３に示すようにＴａ＞Ｔｂ＞
Ｔｃ＞Ｔｄとなるように形成され、これらの各値は燃焼
室孔１１の全周に亘って均一の面圧が得られるように夫
々適宜設定される。一方、図１の下方側即ち排気側のシ
ール部材１６は燃焼室孔１１，１１が相互に隣接する中
間部に対峙する部分Ｂの厚さが最大値となるように設定
され、その他の部分Ｅはこれより薄い略一定の厚さＴ
ｅ、例えばＴｂもしくはＴｃと同等の厚さに設定されて
いる。Thus, the respective parts A to D of the seal member 16
The thicknesses Ta to Td are Ta>Tb> as shown in FIG.
It is formed so that Tc> Td, and each of these values is appropriately set so that a uniform surface pressure can be obtained over the entire circumference of the combustion chamber hole 11. On the other hand, the seal member 16 on the lower side of FIG. 1, that is, on the exhaust side, is set so that the thickness of the portion B facing the intermediate portions where the combustion chamber holes 11, 11 are adjacent to each other becomes the maximum value, and the other portion E. Is a substantially constant thickness T which is thinner than this
e, for example, a thickness equivalent to Tb or Tc.
【００１８】尚、図示は省略したが、本実施例のシール
部材１６を形成する前に、基板１０及びシムリング１４
の全面に、加硫されたフッ素系ゴムから成る加硫ゴム層
を形成することが好ましい。更に、シリンダブロック及
びシリンダヘッドとの接合時のシール性を確保すべく、
シール部材１６、シムリング１４及び基板１０の全表面
に、加硫剤を含有していない非加硫ゴム、又は加硫剤を
含有しているが加硫処理が行われていない未加硫ゴムを
付着することとしてもよい。Although illustration is omitted, before forming the seal member 16 of this embodiment, the substrate 10 and the shim ring 14 are formed.
It is preferable to form a vulcanized rubber layer made of vulcanized fluoro rubber on the entire surface of the. Furthermore, in order to secure the sealing property when joining the cylinder block and the cylinder head,
On the entire surfaces of the seal member 16, the shim ring 14, and the substrate 10, non-vulcanized rubber containing no vulcanizing agent or unvulcanized rubber containing a vulcanizing agent but not vulcanized. It may be attached.
【００１９】上記のように構成されたシリンダヘッドガ
スケットが内燃機関に装着され締付力が加えられると、
先ずビード１３の頂部がシリンダヘッド（又はシリンダ
ブロック）に当接しビード１３が圧縮変形する。このと
き、ビード１３の高さはシムリング１４の厚さより大で
あるためビード１３はシムリング１４の厚さと等しくな
るまで変形し得るが、それ以上は変形しない。即ち、シ
リンダヘッド及びシリンダブロック間が緊締され、シム
リング１４が圧縮されるに至ると、ビード１３の変形は
それ以上進むことなく、その弾性復元力を以ってシリン
ダヘッドガスケットがシリンダブロック及びシリンダヘ
ッドに密着することとなる。従って、燃焼室孔１１に対
するシール機能という観点からすると、シムリング１４
はビード１３のシール機能を保持すると共にそれ自体シ
ール部材として機能し、結局シール部材１６を含み三段
のシールを構成し安定したシール性が確保される。When the cylinder head gasket constructed as described above is mounted on an internal combustion engine and a tightening force is applied,
First, the top of the bead 13 comes into contact with the cylinder head (or cylinder block), and the bead 13 is compressed and deformed. At this time, since the height of the bead 13 is larger than the thickness of the shim ring 14, the bead 13 can deform until it becomes equal to the thickness of the shim ring 14, but it does not deform further. That is, when the space between the cylinder head and the cylinder block is tightened and the shim ring 14 is compressed, the deformation of the bead 13 does not proceed any further, and the elastic restoring force of the bead 13 causes the cylinder head gasket to move the cylinder block and the cylinder head. Will be in close contact with. Therefore, from the viewpoint of the sealing function for the combustion chamber hole 11, the shim ring 14
Holds the sealing function of the bead 13 and also functions as a sealing member by itself, and eventually, the sealing member 16 is included to form a three-stage seal, and stable sealing performance is ensured.
【００２０】上記シリンダヘッドガスケットに加えられ
る締結力の分布に応じて、シール部材１６が吸気側及び
排気側で夫々適切な厚さ分布と成るように形成されてい
るので、シリンダヘッドガスケットのシール部材１６形
成部分は各燃焼室孔１１の全周に亘り実質的に均一の面
圧分布が得られ、良好なシール性が確保される。尚、シ
ール部材１６の燃焼室孔１１，１１が相互に隣接する中
間部に対峙する部分Ｂに関し、吸気側と排気側とで厚さ
を異ならせるようにしてもよく、例えば吸気側（図１の
上方側）の同部分Ｂの厚さを排気側の同部分Ｂの厚さよ
り大に形成することとしてもよい。The seal member 16 is formed to have an appropriate thickness distribution on the intake side and the exhaust side according to the distribution of the fastening force applied to the cylinder head gasket. In the portion where 16 is formed, a substantially uniform surface pressure distribution is obtained over the entire circumference of each combustion chamber hole 11, and good sealability is secured. Regarding the portion B where the combustion chamber holes 11, 11 of the seal member 16 face the mutually adjacent intermediate portions, the thickness may be different between the intake side and the exhaust side, for example, the intake side (FIG. 1). The thickness of the same portion B on the upper side) may be made larger than the thickness of the same portion B on the exhaust side.
【００２１】[0021]
【発明の効果】本発明は上述のように構成されているの
で、以下に記載する効果を奏する。即ち、本発明のシリ
ンダヘッドガスケットにおいては、基板の長手方向に対
し左右方向の少くとも一方側のシール部材の厚さに関
し、複数のボルト孔が相互に隣接するボルト孔間に位置
する部分とその他の部分とで異なる値とされているの
で、シール部材の全周に亘り略均等の面圧が得られ、燃
焼室孔の全周に亘り良好なシール性を確保することがで
きる。Since the present invention is configured as described above, it has the following effects. That is, in the cylinder head gasket of the present invention, regarding the thickness of the seal member on at least one side in the left-right direction with respect to the longitudinal direction of the substrate, a portion in which a plurality of bolt holes are located between mutually adjacent bolt holes and other Since the value is different from that of the portion, a substantially uniform surface pressure can be obtained over the entire circumference of the seal member, and good sealing performance can be ensured over the entire circumference of the combustion chamber hole.
【００２２】更に、シリンダヘッドガスケットのシール
部材を、基板の長手方向に対し左右方向で厚さの分布が
異なるように形成したものにあっては、シリンダヘッド
ガスケットに加えられる締結力の分布が基板の長手方向
に対し左右方向で異なる場合でも全周に亘って実質的に
均一の面圧分布が得られるので、一層良好なシール性を
確保することができる。Further, in the case where the seal member of the cylinder head gasket is formed so that the thickness distribution is different in the left-right direction with respect to the longitudinal direction of the substrate, the distribution of the fastening force applied to the cylinder head gasket is Even if the lengthwise direction differs from the left-right direction, a substantially uniform surface pressure distribution can be obtained over the entire circumference, so that better sealing performance can be secured.
【図１】本発明の一実施例に係るシリンダヘッドガスケ
ットの平面図である。FIG. 1 is a plan view of a cylinder head gasket according to an embodiment of the present invention.
【図２】本発明の一実施例に係るシリンダヘッドガスケ
ットの一部の断面図で、図１のＸ−Ｘ線断面図である。FIG. 2 is a partial cross-sectional view of a cylinder head gasket according to an embodiment of the present invention, which is a cross-sectional view taken along line XX of FIG.
【図３】本発明の一実施例に係るシリンダヘッドガスケ
ットの一部の側面図である。FIG. 3 is a side view of a part of the cylinder head gasket according to the embodiment of the present invention.
１０ 基板 １１ 燃焼室孔 １２ ボルト孔 １３ ビード １４ シムリング １６ シール部材 10 Substrate 11 Combustion Chamber Hole 12 Bolt Hole 13 Bead 14 Shim Ring 16 Sealing Member
───────────────────────────────────────────────────── フロントページの続き (72)発明者 新保 善一 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 (72)発明者 中田 和哉 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Zenichi Zenbo, Toyota Town, Toyota City, Aichi Prefecture, Toyota Toyota Motor Corporation (72) Inventor, Kazuya Nakata, Toyota Town, Toyota City, Aichi Prefecture, Toyota Motor Corporation
Claims (3)
の燃焼室孔を一列に穿設すると共に、該複数の燃焼室孔
回りに複数のボルト孔を穿設し、前記複数の燃焼室孔の
各々の周囲にビードを形成すると共に、該ビードの各々
の凸部側の外周裾縁に沿って連続するシール部材を設け
たシリンダヘッドガスケットにおいて、前記基板の長手
方向に対し左右方向の少くとも一方側の前記シール部材
の厚さを、前記複数のボルト孔が相互に隣接するボルト
孔間に位置する部分とその他の部分とで異なる値とした
ことを特徴とするシリンダヘッドガスケット。1. A plurality of combustion chamber holes through which combustion gas passes are formed in a row on a metal substrate, and a plurality of bolt holes are formed around the plurality of combustion chamber holes to form a plurality of combustion chambers. In a cylinder head gasket in which a bead is formed around each of the holes and a sealing member is provided continuously along the outer peripheral hem on the convex side of each bead, the cylinder head gasket has a small amount in the left-right direction with respect to the longitudinal direction of the substrate. A cylinder head gasket, wherein the thickness of the seal member on one side is different between a portion of the plurality of bolt holes located between adjacent bolt holes and another portion.
板の長手方向に対し左右方向の一方側の前記シール部材
の厚さに関し、前記ボルト孔間の中央部分を最大値に設
定し、前記複数の燃焼室孔が相互に隣接する中間部に対
峙する部分を前記ボルト孔間の中央部分より小さく設定
し、前記ボルト孔の近傍部分を最小値に設定したことを
特徴とする請求項１記載のシリンダヘッドガスケット。2. With respect to the thickness of the seal member on one side in the left-right direction with respect to the longitudinal direction of the substrate of the cylinder head gasket, the central portion between the bolt holes is set to the maximum value, and the plurality of combustion chambers are set. 2. The cylinder head gasket according to claim 1, wherein a portion of the hole facing the intermediate portion adjacent to each other is set smaller than a central portion between the bolt holes, and a portion in the vicinity of the bolt hole is set to a minimum value. ..
板の長手方向に対し左右方向の他方側の前記シール部材
の厚さに関し、前記複数の燃焼室孔が相互に隣接する中
間部に対峙する部分を最大値に設定したことを特徴とす
る請求項２記載のシリンダヘッドガスケット。3. The thickness of the seal member on the other side in the left-right direction with respect to the longitudinal direction of the substrate of the cylinder head gasket is such that the maximum portion where the plurality of combustion chamber holes face the mutually adjacent intermediate portions is maximized. The cylinder head gasket according to claim 2, wherein the value is set to a value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32007491A JP3310313B2 (en) | 1991-10-28 | 1991-10-28 | Cylinder head gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32007491A JP3310313B2 (en) | 1991-10-28 | 1991-10-28 | Cylinder head gasket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05126257A true JPH05126257A (en) | 1993-05-21 |
| JP3310313B2 JP3310313B2 (en) | 2002-08-05 |
Family
ID=18117429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32007491A Expired - Fee Related JP3310313B2 (en) | 1991-10-28 | 1991-10-28 | Cylinder head gasket |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3310313B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5628113A (en) * | 1993-07-07 | 1997-05-13 | Nippon Leakless Industry Co., Ltd. | Metal gasket assembly |
-
1991
- 1991-10-28 JP JP32007491A patent/JP3310313B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5628113A (en) * | 1993-07-07 | 1997-05-13 | Nippon Leakless Industry Co., Ltd. | Metal gasket assembly |
| US6619666B1 (en) | 1993-07-07 | 2003-09-16 | Nippon Leakless Industry Co., Ltd. | Metal gasket assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3310313B2 (en) | 2002-08-05 |
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