JPH08291865A - Cylinder head gasket - Google Patents
Cylinder head gasketInfo
- Publication number
- JPH08291865A JPH08291865A JP12073495A JP12073495A JPH08291865A JP H08291865 A JPH08291865 A JP H08291865A JP 12073495 A JP12073495 A JP 12073495A JP 12073495 A JP12073495 A JP 12073495A JP H08291865 A JPH08291865 A JP H08291865A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder head
- material layer
- sealing material
- around
- coated
- 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】本発明は単一或は複数の金属板か
らなるシリンダヘッドガスケットに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder head gasket composed of a single metal plate or a plurality of metal plates.
【０００２】[0002]
【従来の技術】単板金属板或は複数枚積層した金属板か
らなるシリンダヘッド用の金属ガスケットにおいては、
シリンダヘッド及びシリンダブロックの接合面に接する
金属板表面に、また金属ガスケットを構成する他の金属
板と対向する金属板表面に、金属表面の粗さや不整を吸
収してシール性を高めるために、耐熱性及び柔軟性を有
するシール材層例えばフッ素ゴム、シリコーンゴム、ニ
トリルゴム等の被膜を被覆している。かかるシール材層
は金属板の全体に一様に被覆するのが通常である。2. Description of the Related Art In a metal gasket for a cylinder head, which is composed of a single metal plate or a metal plate in which a plurality of metal plates are laminated,
In order to improve the sealability by absorbing the roughness and irregularity of the metal surface on the metal plate surface in contact with the joint surface of the cylinder head and the cylinder block, and on the metal plate surface facing the other metal plate constituting the metal gasket, A sealing material layer having heat resistance and flexibility, for example, a coating of fluororubber, silicone rubber, nitrile rubber or the like is coated. Such a sealing material layer usually covers the entire metal plate uniformly.
【０００３】[0003]
【発明が解決しようとする課題】シリンダヘッドがアル
ミニウムからなりシリンダブロックが鋳鉄からなるエン
ジンにおいては、両者の熱膨張の特性の相違に基づき、
エンジンの運転開始時にまた運転停止時にシリンダヘッ
ドの接合面とシリンダブロックの接合面との間に相対的
な移動を生じる。そしてかかる相対的移動の繰返しによ
り、該接合面間に挟着された金属ガスケットの接合面に
圧接される金属板表面の軟質のシール材層に外方への押
出し、摩耗、接着剥離等による劣化や破断を生じ、ガス
ケットのシール性能を損なうという問題がある。シリン
ダヘッド及びシリンダブロックの双方がアルミニウムか
らなる場合においても、シリンダヘッドとブロックとの
構造の相違により熱膨張に差を生じ（通常はシリンダヘ
ッド側の膨張が大きい）、上記と同様な問題を生じる。In an engine in which the cylinder head is made of aluminum and the cylinder block is made of cast iron, the difference in thermal expansion characteristics between the two causes
Relative movement occurs between the joint surface of the cylinder head and the joint surface of the cylinder block when the engine is started and when the engine is stopped. By repeating such relative movement, deterioration due to outward extrusion, abrasion, peeling of adhesive, etc. to the soft sealing material layer on the surface of the metal plate pressed against the joint surface of the metal gasket sandwiched between the joint surfaces. There is a problem in that the seal performance of the gasket is impaired due to breakage or breakage. Even when both the cylinder head and the cylinder block are made of aluminum, there is a difference in thermal expansion due to the difference in structure between the cylinder head and the block (usually the expansion on the cylinder head side is large), and the same problem as described above occurs. .
【０００４】上記のシール材層の劣化、破断は熱膨張が
大きい接合面（通常、シリンダヘッドの接合面）に接す
る金属板表面の燃焼室用開口の周り、水穴、油穴等の液
体通路穴の周り及びガスケットの周縁部を輪廻する周縁
シール部等の部位のシール材層、またボルト穴周りのシ
ール材層において生じ易い。これらの部位は、燃焼室用
開口、液体通路穴或はガスケット周縁をシールするため
にビード、折り返し、グロメット等が施され、高い面圧
のシール線が形成されている高面圧の部位であり、ま
た、ボルト穴周りは、ボルト穴周りにビードが形成され
ていない場合においても、ボルトの締付力により高い面
圧を受けている部位である。The deterioration and rupture of the above-mentioned sealing material layer is caused by a liquid passage such as a water hole, an oil hole, etc. around the opening for the combustion chamber on the surface of the metal plate in contact with the joint surface (usually the joint surface of the cylinder head) having a large thermal expansion. It is likely to occur in the sealing material layer around the holes and in the peripheral sealing portion that circles around the peripheral edge of the gasket, and also in the sealing material layer around the bolt holes. These parts are high surface pressure parts where beads, folds, grommets, etc. are applied to seal the combustion chamber opening, the liquid passage hole or the peripheral edge of the gasket, and a seal line with high surface pressure is formed. Also, the area around the bolt hole is a portion that is subjected to a high surface pressure due to the tightening force of the bolt even when a bead is not formed around the bolt hole.
【０００５】かかる高面圧部位においては、シリンダヘ
ッド及びブロックの接合面に接するシール材層が該接合
面から大きい圧力を受けており、接合面が熱膨張差に基
づき相対的に移動するときにシール材層に大きい摩擦力
が作用する。また高面圧部位のシール材層には、高い面
圧によりシール材層を隣接する低面圧部側に流動させる
力が作用している。これらが、上記の部位においてシー
ル材層の劣化や破断を生じ易い原因となっていると思わ
れる。At such a high surface pressure portion, the sealing material layer in contact with the joint surface of the cylinder head and the block receives a large pressure from the joint surface, and when the joint surface relatively moves due to the difference in thermal expansion. A large frictional force acts on the sealing material layer. Further, a force that causes the seal material layer to flow to the adjacent low surface pressure portion side acts on the seal material layer at the high surface pressure portion due to the high surface pressure. It is considered that these are the causes of the deterioration and breakage of the sealing material layer in the above-mentioned region.
【０００６】シール材層の劣化、破断が生じ易い燃焼室
用開口周り、液体通路穴周り等は最も肝心なシール部位
であり、かかる部位において生じたシール材層の劣化、
破断はガスケットのシール性能に影響する所が大きく、
シール材層の機能が失われることは固より、劣化、破断
したシール材層がシール面を粗面化、不整面化する等し
てガスケットのシール性能を阻害することにもなり易
い。Around the combustion chamber opening, around the liquid passage hole, etc., where the sealing material layer is liable to be deteriorated or broken, is the most important sealing portion, and the deterioration of the sealing material layer caused at such portion,
Fracture largely affects the gasket sealing performance,
The loss of the function of the sealing material layer is more likely to impair the sealing performance of the gasket due to the deteriorated or broken sealing material layer roughening or irregularizing the sealing surface.
【０００７】本発明は上記の問題点を解消し、シリンダ
ヘッド及びシリンダブロックの接合面の中の熱膨張が大
きい側の接合面に接する金属板表面の燃焼室用開口の周
り、液体通路穴の周り等の高面圧部においてシール材層
に劣化、破断を生じ、ガスケットのシール性能が阻害さ
れるのを防止することを目的とするものである。The present invention solves the above-mentioned problems and surrounds the opening for the combustion chamber on the surface of the metal plate which is in contact with the joint surface of the joint surface of the cylinder head and the cylinder block on the side where the thermal expansion is large, and the liquid passage hole. The purpose is to prevent the sealing performance of the gasket from being impaired due to deterioration and breakage of the sealing material layer in a high surface pressure portion such as the periphery.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成する本発
明は、燃焼室用開口、液体通路穴及びボルト挿通用のボ
ルト穴を備えた単一もしくは複数の金属板からなり、少
なくともシリンダヘッド及びブロックの接合面に接する
金属板表面にシール材層を被覆したシリンダヘッドガス
ケットにおいて、シリンダヘッド及びブロックの接合面
の中の熱膨張が大きい側の接合面に接する金属板表面の
少なくとも燃焼室用開口の周りの高面圧部位に比較的低
面圧の部位の軟質シール材層よりも硬質のシール材層を
被覆したことを特徴とするものである。また本発明は、
上記の燃焼室用開口の周りの高面圧部位に加えて、液体
通路穴周りの部位にも、また、これらに加えてガスケッ
トの周縁部を輪廻する周縁シール部位にも、更にはこれ
らに加えてボルト穴周りの高面圧部位にも、前記の硬質
のシール材層を被覆することを特徴とするものである。SUMMARY OF THE INVENTION The present invention for achieving the above object comprises a single or a plurality of metal plates having a combustion chamber opening, a liquid passage hole and a bolt hole for inserting a bolt. In a cylinder head gasket in which a sealing material layer is coated on the surface of a metal plate in contact with the joint surface of a block, at least the combustion chamber opening on the surface of the metal plate in contact with the joint surface of the joint surface of the cylinder head and the block on which the thermal expansion is large It is characterized in that a high surface pressure portion around the is covered with a sealing material layer which is harder than the soft sealing material layer in a portion having a relatively low surface pressure. The present invention also provides
In addition to the above-mentioned high surface pressure area around the opening for the combustion chamber, also in the area around the liquid passage hole, and in addition to these, in the peripheral seal area that revolves around the gasket peripheral edge, and in addition to these The high surface pressure portion around the bolt hole is also coated with the hard sealing material layer.
【０００９】なお、上記した本発明の構成において言う
高面圧部位及び比較的低面圧の部位とは、後記の実施例
に示されているように、それぞれ下記の部位を言う。す
なわち、高面圧部位とはビード、折り返し、グロメッ
ト、シム板等の面圧を高めるための手段が施されている
部位及びボルト穴の近傍の部位を言い、かかる部位では
ガスケットをシリンダヘッドとブロックの接合面の間に
挟着し、ボルト締結し、ガスケットを締付け圧縮したと
きに高い面圧を生じる。比較的低面圧の部位とは、ビー
ド、折り返し、グロメット、シム板等の面圧を高めるた
めの手段が施されていない、また締結ボルトの近傍の高
面圧部位でもない部位を言い、ガスケットを締付けたと
きのこれらの部位における面圧は上記の高面圧部位の面
圧に較べかなり小さい。The high surface pressure portion and the relatively low surface pressure portion in the above-mentioned structure of the present invention respectively refer to the following portions, as shown in Examples described later. That is, the high surface pressure part means a part where a means for increasing the surface pressure such as a bead, a folded part, a grommet, a shim plate, etc. is provided and a part in the vicinity of the bolt hole. It is sandwiched between the joint surfaces of, and bolted, and a high surface pressure is generated when the gasket is tightened and compressed. A part with relatively low surface pressure means a part that is not provided with means for increasing the surface pressure such as beads, folds, grommets, shim plates, etc., and is also not a high surface pressure part near the fastening bolts. The surface pressures at these parts when tightened are considerably smaller than the surface pressures at the above-mentioned high surface pressure parts.
【００１０】[0010]
【作用】上記した構成の本発明のシリンダヘッドガスケ
ットにおいては、少なくとも、シリンダヘッド及びブロ
ックの接合面の中の熱膨張が大きい方の接合面に接する
金属板表面において高面圧部位と比較的低面圧の部位と
でシール材を使い分け、少なくとも、該表面中で最も高
い面圧の部位となる燃焼室用開口の周りの高面圧部位に
は硬質のシール材層を被覆し、また好ましくは、液体通
路穴の周りの高面圧部位、周縁シール部位、更にはボル
ト穴近傍の高面圧部位にも硬質のシール材層を被覆する
ので、これら部位におけるシール材層は耐押出性、耐摩
耗性、耐流動性、金属板との接着強度が著しく改善され
る。従って、エンジンの運転開始時或は運転停止時等
に、シリンダヘッドとシリンダブロックとの熱膨張の差
に基づき熱膨張が大きい側の接合面がガスケット表面を
圧接しながら相対的に移動することが繰返されても、上
記の硬質のシール材層が被覆された高面圧部位におい
て、シール材の押出、摩耗、流動等によるシール材層の
劣化や破断は生じない。In the cylinder head gasket of the present invention having the above-mentioned structure, at least the metal plate surface contacting the joint surface of the cylinder head and the block, which has the larger thermal expansion, has a relatively low surface area and a relatively high surface pressure portion. A sealant is selectively used depending on the surface pressure portion, and at least a high surface pressure portion around the combustion chamber opening, which is the highest surface pressure portion on the surface, is covered with a hard sealant layer, and preferably Since a high sealing pressure layer around the liquid passage hole, a peripheral sealing portion, and a high sealing pressure portion near the bolt hole are also covered with a hard sealing material layer, the sealing material layer in these portions is resistant to extrusion and Abrasion resistance, flow resistance, and adhesive strength with a metal plate are significantly improved. Therefore, at the time of starting or stopping the operation of the engine, the joint surface on the side of large thermal expansion may relatively move while pressing the gasket surface due to the difference in thermal expansion between the cylinder head and the cylinder block. Even if it is repeated, deterioration or breakage of the sealing material layer due to extrusion, wear, flow, etc. of the sealing material does not occur at the high surface pressure portion covered with the hard sealing material layer.
【００１１】シール材層を構成するシール材にはシール
面の粗さや不整を吸収してシール性を高める点からは比
較的軟質のシール材が適しており、硬質のシール材層は
シール材層としての機能が軟質のシール材よりも劣ると
考えられるが、硬質のシール材層を施す部位は高面圧部
位であるから、シール材が硬質であっても、充分なシー
ル性能を確保できる。A relatively soft sealing material is suitable for the sealing material constituting the sealing material layer from the viewpoint of absorbing roughness and irregularity of the sealing surface to enhance the sealing property, and a hard sealing material layer is a sealing material layer. Although it is considered that the above function is inferior to that of the soft sealing material, since the portion where the hard sealing material layer is applied is the high surface pressure portion, sufficient sealing performance can be secured even if the sealing material is hard.
【００１２】一方、比較的低面圧の部位においては従来
と同様な軟質のシール材層を被覆するので、低面圧下で
も充分なシール性を確保できる。そして比較的低面圧の
部位においては前述の摩擦力も小さく、押出力も殆んど
作用しないので、被覆されたシール材層が軟質であって
も劣化、破断が生じる危険は少ない。本発明において
は、上記の通り、部位の面圧の高低によりシール材層を
硬質、軟質使い分けるので、高面圧部位においては充分
な耐摩耗性、耐押出性、耐流動性をもつ硬度が大きいシ
ール材を用いることができるとともに、比較的低面圧の
部位においてはシール材を従来よりもより軟質とし、同
部位におけるシール性を向上させることもできる。On the other hand, since a soft sealing material layer similar to the conventional one is coated on a portion having a relatively low surface pressure, sufficient sealing performance can be secured even under a low surface pressure. In the region of relatively low surface pressure, the above-mentioned frictional force is small and the pushing force hardly acts, so that even if the coated sealing material layer is soft, there is little risk of deterioration and breakage. In the present invention, as described above, the sealing material layer is selectively used depending on whether the surface pressure of the portion is high or low. Therefore, in the high surface pressure portion, the hardness having sufficient wear resistance, extrusion resistance and fluidity resistance is large. A sealing material can be used, and the sealing material can be made softer than before in a portion having a relatively low surface pressure to improve the sealing property in the portion.
【００１３】[0013]
【実施例】本発明の詳細を実施例の図面に基づき以下に
説明する。ただし、以下においてはシリンダヘッドがシ
リンダブロックよりも熱膨張が大きいものと仮定して説
明する。図１は本発明の第１実施例の平面図であり、図
２は図１のＡ−Ａ線による断面図である。図３は本発明
の第２実施例についての図２と同様な断面図である。図
４及び図５は、それぞれ、燃焼室用開口の周りに高面圧
部を形成する他の構造を示す断面図である。図６は本発
明の第３実施例の上面図である。各図において同一符号
は同一部分を示している。また、断面図を示す図面にお
いては上方側がシリンダヘッド側とする。The details of the present invention will be described below with reference to the accompanying drawings. However, in the following description, it is assumed that the cylinder head has a larger thermal expansion than the cylinder block. 1 is a plan view of a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. FIG. 3 is a sectional view similar to FIG. 2 of the second embodiment of the present invention. 4 and 5 are cross-sectional views showing another structure for forming the high surface pressure portion around the combustion chamber opening, respectively. FIG. 6 is a top view of the third embodiment of the present invention. In each figure, the same reference numerals indicate the same parts. Further, in the drawings showing the cross-sectional views, the upper side is the cylinder head side.
【００１４】図１及び図２において、本発明の第１実施
例のシリンダヘッドガスケットＧ１は、ステンレス鋼等
の弾性を有する硬質金属からなる単板の金属板１により
形成されている。該金属板１は燃焼室用開口１１と冷却
水通路穴、オイル通路穴等の液体通路穴１２とシリンダ
ヘッドをシリンダブロックに締結するボルトを挿通する
ボルト穴１４とを備えている。燃焼室用開口１１の周り
には該開口を囲繞する山形ビード１５が形成され、液体
通路穴１２の周りには該開口を囲繞する段差ビード１６
が形成されている。またガスケットＧ１の周縁部には、
上記の燃焼室用開口１１、液体通路穴１２及びボルト穴
１３を包囲して輪廻する段差ビード１７が設けられてい
る。図１では各ビードをその中心線の点線で示してい
る。1 and 2, the cylinder head gasket G1 of the first embodiment of the present invention is formed of a single metal plate 1 made of a hard metal having elasticity such as stainless steel. The metal plate 1 is provided with a combustion chamber opening 11, a liquid passage hole 12 such as a cooling water passage hole and an oil passage hole, and a bolt hole 14 through which a bolt for fastening the cylinder head to the cylinder block is inserted. A chevron bead 15 is formed around the combustion chamber opening 11 so as to surround the opening, and a step bead 16 is formed around the liquid passage hole 12 so as to surround the opening.
Are formed. In addition, in the peripheral portion of the gasket G1,
A step bead 17 that surrounds the combustion chamber opening 11, the liquid passage hole 12, and the bolt hole 13 is provided so as to rotate around. In FIG. 1, each bead is shown by the dotted line of its center line.
【００１５】ガスケットＧ１をエンジンのシリンダヘッ
ドとブロックの接合面の間に挟着し、シリンダヘッド締
結用のボルトを締結してガスケットＧ１を締付けたと
き、上記の山形ビード１５、段差ビード１６及び１７は
それぞれボルトの締付力により圧縮され、山形ビード１
４を有する燃焼室用開口周りの部位２１、段差ビードを
備えた液体通路穴周りの部位２２及び段差ビード１７を
有する周縁シール部位２３には高い面圧が与えられ、そ
れぞれ燃焼室用開口１１、液体通路穴１２及びガスケッ
トの周縁部をシールする。図１に示すボルト穴の周りに
はビード等のシール手段を形成していないが、ボルト穴
周りの部位２４にはボルトの締付力により高い面圧が与
えられる。When the gasket G1 is clamped between the joining surfaces of the cylinder head and the block of the engine and the bolts for fastening the cylinder head are fastened to tighten the gasket G1, the above-mentioned chevron beads 15, step beads 16 and 17 are provided. Are respectively compressed by the tightening force of the bolts, and the chevron-shaped beads 1
A high surface pressure is applied to a portion 21 around the opening for the combustion chamber having the step 4, a portion 22 around the liquid passage hole having the step bead, and a peripheral sealing portion 23 having the step bead 17, and the opening 11 for the combustion chamber, respectively. The liquid passage hole 12 and the peripheral portion of the gasket are sealed. Although no sealing means such as beads is formed around the bolt hole shown in FIG. 1, a high surface pressure is applied to the portion 24 around the bolt hole by the tightening force of the bolt.
【００１６】本発明によるシリンダヘッドガスケットＧ
１は、シリンダヘッド及びシリンダブロックの接合面の
中の熱膨張が大きいシリンダヘッドの接合面に接する金
属板１表面（図２の上方側の面）の中の上記した高面圧
の部位２１、２２、２３及び２４においては硬質のシー
ル材層２５（図１においては図面を複雑にしないために
２５の符号及び同符号部分のハッチングを省略してい
る）例えばシリコーン樹脂、エポキシ樹脂、フェノール
樹脂等のプラスチック或はこれらにカーボン、ガラス、
セラミック、金属等の補強充填材を混合した強化プラス
チックス或はアルミニウム等の軟質金属からなるシール
材層が被覆されている。そして上記の部位以外の比較的
低面圧の部位（図１においてハッチングをしている部
位）には従来と同様な軟質のシール材層２６例えばフッ
素ゴム、シリコーンゴム、ニトリルゴム、アクリルゴム
等からなるシール材層が被覆されている。Cylinder head gasket G according to the present invention
The reference numeral 1 designates the above-mentioned high surface pressure portion 21 in the surface (the upper surface in FIG. 2) of the metal plate 1 which is in contact with the joint surface of the cylinder head having a large thermal expansion in the joint surface of the cylinder head and the cylinder block In 23, 24, and 24, a hard sealing material layer 25 (in FIG. 1, the reference numeral 25 and the hatching of the same reference numeral are omitted in order not to complicate the drawing), for example, silicone resin, epoxy resin, phenol resin, etc. Plastic or carbon, glass,
A sealing material layer made of a reinforced plastic mixed with a reinforcing filler such as ceramic or metal or a soft metal such as aluminum is coated. In addition to the above-mentioned portion, a relatively low surface pressure portion (hatched portion in FIG. 1) is made of a soft sealing material layer 26 similar to the conventional one such as fluororubber, silicone rubber, nitrile rubber, acrylic rubber or the like. Is covered with a sealing material layer.
【００１７】上記した硬質シール材層２５及び軟質シー
ル材層２６はフェノール樹脂系接着剤、エポキシ樹脂系
接着剤、アミン系シラン化合物等の接着剤により金属板
１の表面に接着されている。上記の硬質のシール材層は
耐摩耗性、耐押出性、耐流動性に優れ、また金属板との
接着強度も大きい。The hard sealing material layer 25 and the soft sealing material layer 26 described above are adhered to the surface of the metal plate 1 with an adhesive such as a phenol resin adhesive, an epoxy resin adhesive, an amine silane compound or the like. The hard sealing material layer has excellent wear resistance, extrusion resistance, and fluidity resistance, and also has a large adhesive strength with a metal plate.
【００１８】なお、本実施例のガスケットＧ１において
は、シリンダヘッドの接合面に接する表面の中の燃焼室
用開口の周りの高面圧の部位２１、液体通路穴周りの高
面圧の部位２２、周縁シール部位２３及びボルト穴周り
の高面圧の部位２４の全てにおいて硬質のシール材層２
５を被覆したが、最も面圧が高くかつ高温の燃焼ガスの
影響を受け易い燃焼室用開口の周りの部位２１のみを硬
質のシール材層としてもよく、或は燃焼室用開口の周り
の部位２１と液体通路穴の周りの部位２２とを硬質のシ
ール材層とし、或はこれらに加えて周縁シール部位２３
をも硬質のシール材層としてもよい。この点は後記の他
の実施例においても同様である。In the gasket G1 of this embodiment, a high surface pressure portion 21 around the combustion chamber opening and a high surface pressure portion 22 around the liquid passage hole in the surface contacting the joint surface of the cylinder head. The hard sealing material layer 2 in all of the peripheral sealing portion 23 and the high surface pressure portion 24 around the bolt hole.
However, only the portion 21 around the combustion chamber opening, which has the highest surface pressure and is easily affected by the high temperature combustion gas, may be a hard seal material layer, or the portion around the combustion chamber opening may be covered. The portion 21 and the portion 22 around the liquid passage hole are made of a hard sealing material layer, or in addition to these, the peripheral sealing portion 23
May be a hard sealing material layer. This point is the same in other examples described later.
【００１９】図３に断面図を示す本発明の第２実施例の
ガスケットＧ２は、図２に示す第１実施例の単板金属板
１と同じくステンレス鋼等の弾性を有する硬質金属から
なりかつ燃焼室用開口１１の周りにこれを囲繞する山形
ビード１５と液体通路穴１２の周りにこれを囲繞する段
差ビード１６と周縁部を輪廻する段差ビード１７とを備
えたビード板２を備えている。該ビード板２の両側には
ビード板を挟むように、ビード板２よりも硬度が小さい
ステンレス鋼板、鋼板等よりなる表面板３及び４が積層
されている。The gasket G2 of the second embodiment of the present invention, the cross-sectional view of which is shown in FIG. 3, is made of an elastic hard metal such as stainless steel like the single metal plate 1 of the first embodiment shown in FIG. The bead plate 2 is provided with a chevron bead 15 that surrounds the combustion chamber opening 11, a step bead 16 that surrounds the liquid passage hole 12, and a step bead 17 that surrounds the periphery of the liquid passage hole 12. . On both sides of the bead plate 2, surface plates 3 and 4 made of a stainless steel plate, a steel plate or the like having a hardness lower than that of the bead plate 2 are laminated so as to sandwich the bead plate.
【００２０】表面板３及び４それぞれの両表面にはシー
ル材層が被覆されるが、表面板３のシリンダヘッドの接
合面に接する側の表面（図の上方側の表面）において
は、燃焼室用開口の周りのビード１５を備えた高面圧の
部位２１、液体通路穴周りの段差ビード１６を備えた高
面圧の部位２２及び段差ビード１７を備えた周縁シール
部位には前記と同様な硬質のシール材層２５を被覆し、
この表面中の残りの部位及び表面板３のビード板２に対
向にする表面並びに表面板４の両表面には前記と同様な
軟質のシール材層２６を被覆している。Both surfaces of the surface plates 3 and 4 are coated with a sealing material layer, but the surface of the surface plate 3 on the side in contact with the joint surface of the cylinder head (the surface on the upper side in the figure) is the combustion chamber. A high surface pressure portion 21 having a bead 15 around the opening for use, a high surface pressure portion 22 having a step bead 16 around the liquid passage hole, and a peripheral sealing portion having a step bead 17 are similar to the above. Covering the hard sealing material layer 25,
The remaining portion of the surface, the surface of the surface plate 3 facing the bead plate 2 and both surfaces of the surface plate 4 are coated with the same soft sealing material layer 26 as described above.
【００２１】図４に燃焼室用開口１１周りの部分の断面
図を示しているガスケットＧ４はビード板２と折返し板
５とを積層してなり、折返し板５はその燃焼室用開口１
１の周縁に折返し部１７を備え、ビード板２は上記折返
し部１７の外側の位置において燃焼室用開口１１を囲繞
するビード１５を備えている。折返し板５のシリンダヘ
ッド接合面と接する側の表面においては高面圧部位であ
る折返し部１８、ビード１５を備えた燃焼室用開口１１
周りの部位２１には前記と同様な硬質のシール材層２５
を被覆し、ビード１５よりも外側の比較的低面圧の部位
には前記と同様な軟質のシール材層２６を被覆してい
る。折返し板５のビード板２に対向する表面及びビード
板２のシリンダブロックに接する側の面（図の下側の
面）にも軟室のシール材層２６を被覆している。なお、
上記例においては折返し部１８により燃焼室用開口１１
の周縁に厚肉部を形成しているが、、折返し部１８の代
りにシム板を溶接する等して厚肉部を形成してもよい。FIG. 4 shows a cross-sectional view of a portion around the combustion chamber opening 11. A gasket G4 is formed by laminating a bead plate 2 and a folding plate 5, and the folding plate 5 is the combustion chamber opening 1 thereof.
1, the bead plate 2 is provided with a bead 15 surrounding the combustion chamber opening 11 at a position outside the folding part 17. A combustion chamber opening 11 provided with a folded portion 18 and a bead 15 that are high surface pressure portions on the surface of the folded plate 5 that is in contact with the cylinder head joint surface.
A hard sealing material layer 25 similar to the above is provided on the surrounding portion 21.
And a portion having a relatively low surface pressure outside the bead 15 is covered with a soft sealing material layer 26 similar to the above. The surface of the folding plate 5 facing the bead plate 2 and the surface of the bead plate 2 in contact with the cylinder block (the lower surface in the figure) are also covered with the sealing material layer 26 of the soft chamber. In addition,
In the above example, the folding chamber 18 is formed by the folded-back portion 18.
Although the thick portion is formed on the peripheral edge of the above, the thick portion may be formed by welding a shim plate instead of the folded-back portion 18.
【００２２】図５に燃焼室用開口１１周りの部分の断面
図を示しているガスケットＧ５は、上板６と中間板７と
下板８とを積層してなり、下板８の燃焼室用開口１１周
りの端縁８ａを上板６の開口１１周縁部上に折返してグ
ロメット１９を形成している。シリンダヘッドの接合面
に接する上板６の外表面においては燃焼室用開口周りの
グロメット１９を備えた高面圧部位２１に硬質のシール
材層２５を被覆し、グロメットの外側の比較的低面圧の
部位及び下板８の外側表面に軟質のシール材層２６を被
覆している。なお、グロメット１９は上記のように下板
を折返して形成する代りに別体のグロメット部材を上
板、中間板及び下板の開口周縁部を覆うように被着して
形成してもよい。FIG. 5 shows a cross-sectional view of a portion around the combustion chamber opening 11 in which a gasket G5 is formed by laminating an upper plate 6, an intermediate plate 7 and a lower plate 8. An edge 8a around the opening 11 is folded back on the peripheral edge of the opening 11 of the upper plate 6 to form a grommet 19. On the outer surface of the upper plate 6 in contact with the joint surface of the cylinder head, a high surface pressure portion 21 provided with the grommet 19 around the opening for the combustion chamber is covered with a hard sealing material layer 25, and a relatively low surface outside the grommet. A soft sealing material layer 26 is coated on the pressure portion and the outer surface of the lower plate 8. Note that the grommet 19 may be formed by attaching a separate grommet member so as to cover the peripheral edges of the openings of the upper plate, the intermediate plate and the lower plate, instead of folding and forming the lower plate as described above.
【００２３】図６に上面を示す第３実施例のガスケット
Ｇ３においては、燃焼室用開口１１の周りのビード１５
を備えた高面圧の部位２１、液体通路穴１２の周りのビ
ード１６を備えた高面圧の部位２２、ビード１７を備え
た周縁シール部位２３及びボルト穴１４周りの高面圧の
部位２４にはそれぞれ硬質のシール材層を被覆し、これ
らの高面圧の部位２１、２２、２３及び２４に隣接する
部位（図６のハッチング部分）に軟質のシール材層２６
を被覆している。この第３実施例は、図１の第１実施例
との比較により明らかな通り、ガスケットの面内のシー
ルに殆んど寄与しない部分２７にはシール材層を被覆し
ないので、ボルトの締付トルクがこれらの部分によって
無駄に消費されるのを防いで面圧分布を改善し、またシ
ール材を節減できる利点がある。In the gasket G3 of the third embodiment, the upper surface of which is shown in FIG. 6, the bead 15 around the combustion chamber opening 11 is used.
High surface pressure portion 21 with a bead 16, a high surface pressure portion 22 with a bead 16 around the liquid passage hole 12, a peripheral sealing portion 23 with a bead 17 and a high surface pressure portion 24 around the bolt hole 14. Is coated with a hard sealing material layer, and the soft sealing material layer 26 is applied to the portions (hatched portions in FIG. 6) adjacent to these high surface pressure portions 21, 22, 23 and 24.
Is covered. In this third embodiment, as is clear from a comparison with the first embodiment of FIG. 1, the portion 27 that hardly contributes to the in-plane sealing of the gasket is not covered with the seal material layer, so that the bolt is tightened. There is an advantage that the torque is prevented from being wasted by these portions, the surface pressure distribution is improved, and the sealing material is saved.
【００２４】本発明は上記説明した実施例及びその変形
以外にも種々の変形が可能である。例えばボルト穴１４
の周りにビードを設けることもできるし、個々の冷却水
通路穴の周りにはビード等のシール手段を設けず、多数
個の冷却水通路穴を一括して包囲するビードを設けるこ
ともできる。この場合は個々の冷却水通路穴の周りには
高面圧部が形成されず、一括包囲するビード部分が高面
圧部位を形成することになり、シール材層もこれに応じ
て改変される。また、第１実施例のような単板金属ガス
ケットにおいてはガスケットの周縁部を輪廻する周縁部
シールとして段差ビード等のビードを設ける代りに、硬
質ゴム、硬質プラスチック或は軟質金属等の凸条部材か
らなる周縁部シールを設けるようにしてもよい。この場
合は周縁部シールの凸条部材の表面にシール材層を被覆
する必要はない。The present invention can be variously modified in addition to the above-described embodiments and modifications thereof. For example, bolt hole 14
A bead may be provided around the cooling water passage hole, or a bead that surrounds a large number of cooling water passage holes at once may be provided without providing a sealing means such as a bead around each cooling water passage hole. In this case, the high surface pressure portion is not formed around each cooling water passage hole, and the bead portion enclosing the cooling water passage hole forms the high surface pressure portion, and the sealing material layer is also modified accordingly. . Further, in the single plate metal gasket as in the first embodiment, instead of providing a bead such as a stepped bead as a peripheral edge seal that revolves around the peripheral edge of the gasket, a convex strip member made of hard rubber, hard plastic or soft metal is used. You may make it provide the peripheral part seal which consists of. In this case, it is not necessary to coat the surface of the protruding member of the peripheral edge seal with the sealing material layer.
【００２５】[0025]
【発明の効果】上記説明した本発明のシリンダヘッドガ
スケットにおいては、シリンダヘッド及びブロックの接
合面の中の熱膨張が大きい方の接合面に接する金属板の
表面の燃焼室用開口周り等の高面圧部位には耐摩耗性、
耐押出性、耐流動性に優れた硬質のシール材層が被覆さ
れ、比較的低面圧の部位にはシール性に優れた軟質のシ
ール材層が被覆されているので、エンジンの運転開始時
或は運転停止時等にシリンダヘッドとシリンダブロック
との熱膨張特性の差に基づき熱膨張が大きい側の接合面
が他の接合面に対し相対的に移動し、これが繰返されて
も、上記高面圧部位においてシール材層が摩耗、押出
し、流動等による劣化や破断を生じることがなく、また
劣化、破断したシール材層がガスケットのシール性能を
阻害することがない。本発明の金属ガスケットは良好な
シール性能を保持することができる。In the cylinder head gasket of the present invention described above, the height around the combustion chamber opening of the surface of the metal plate in contact with the joint surface of the joint surface of the cylinder head and the block having the greater thermal expansion. Wear resistance at the surface pressure area,
A hard sealant layer with excellent extrusion resistance and fluidity resistance is covered, and a soft sealant layer with excellent sealability is covered on the parts with relatively low surface pressure. Alternatively, even if the joint surface on the side of large thermal expansion moves relative to the other joint surfaces due to the difference in thermal expansion characteristics between the cylinder head and the cylinder block when the operation is stopped, etc. The sealing material layer does not deteriorate or break due to wear, extrusion, flow or the like at the surface pressure portion, and the deteriorated or broken sealing material layer does not hinder the sealing performance of the gasket. The metal gasket of the present invention can maintain good sealing performance.
【図１】本発明の第１実施例の平面図。FIG. 1 is a plan view of a first embodiment of the present invention.
【図２】図１のＡ−Ａ線による断面図。FIG. 2 is a sectional view taken along line AA of FIG.
【図３】本発明の第２実施例についての図２と同様な断
面図。FIG. 3 is a sectional view similar to FIG. 2 of a second embodiment of the present invention.
【図４】燃焼室用開口の周りの高面圧部の他の構成の断
面図。FIG. 4 is a cross-sectional view of another configuration of the high surface pressure portion around the opening for the combustion chamber.
【図５】燃焼室用開口の周りの高面圧部の更に他の構成
の断面図。FIG. 5 is a sectional view of still another configuration of the high surface pressure portion around the opening for the combustion chamber.
【図６】本発明の第３実施例の上面図。FIG. 6 is a top view of the third embodiment of the present invention.
１１ 燃焼室用開口 １２ 液体通路穴 １４ ボルト穴 １５ 山形段差ビード １６及び１７ 段差ビード ２１ 燃焼室用開口周りの高面圧部位 ２２ 液体通路穴周りの高面圧部位 ２３ 周縁シール部位 ２４ ボルト穴周りの高面圧部位 ２５ 硬質のシール材層 ２６ 軟質のシール材層 11 Combustion Chamber Openings 12 Liquid Passage Holes 14 Bolt Holes 15 Angle Stepped Beads 16 and 17 Stepped Beads 21 High Surface Pressure Areas Around Combustion Chamber Openings 22 High Surface Pressure Areas Around Liquid Passage Holes 23 Peripheral Sealed Areas 24 Bolt Hole Surroundings High surface pressure part of 25 25 Hard sealing material layer 26 Soft sealing material layer
Claims (5)
通用のボルト穴を備えた単一もしくは複数の金属板から
なり、少なくともシリンダヘッド及びブロックの接合面
に接する金属板表面にシール材層を被覆したシリンダヘ
ッドガスケットにおいて、シリンダヘッド及びシリンダ
ブロックの接合面の中の熱膨張が大きい側の接合面に接
する金属板表面における少なくとも燃焼室用開口周りの
高面圧部位に比較的低面圧の部位に被覆された軟質のシ
ール材層よりも硬質の硬質シール材層を被覆したことを
特徴とするシリンダヘッドガスケット。1. A sealant layer made of a single or a plurality of metal plates having a combustion chamber opening, a liquid passage hole, and a bolt hole for inserting a bolt, and at least a metal plate surface in contact with a joint surface of a cylinder head and a block. In a cylinder head gasket covered with, a relatively low surface pressure is applied to at least the high surface pressure area around the opening for the combustion chamber on the surface of the metal plate in contact with the joint surface of the cylinder head and the cylinder block where the thermal expansion is large. A cylinder head gasket characterized by being coated with a hard sealing material layer that is harder than the soft sealing material layer that has been coated on the part.
の金属板表面における液体通路穴の周りの高面圧部位に
も前記の硬質シール材層を被覆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. The hard sealing material layer is also coated on the high surface pressure portion around the liquid passage hole on the surface of the metal plate which is in contact with the joint surface on the side of large thermal expansion. Cylinder head gasket described.
の金属板表面において、その周縁部を輪廻する周縁シー
ル部位にも前記の硬質シール材層を被覆したことを特徴
とする請求項１又は２記載のシリンダヘッドガスケッ
ト。3. The hard sealing material layer is also coated on a peripheral edge sealing portion which circulates the peripheral edge portion on the surface of the metal plate in contact with the joint surface on the side where the thermal expansion is large. Alternatively, the cylinder head gasket according to item 2.
の金属板表面におけるボルト穴周りの高面圧部にも前記
の硬質シール材層を被覆することを特徴とする請求項３
記載のシリンダヘッドガスケット。4. The hard seal material layer is also coated on a high surface pressure portion around a bolt hole on the surface of the metal plate which is in contact with the joint surface on the side of large thermal expansion.
Cylinder head gasket described.
通用のボルト穴を備えた単一もしくは複数の金属板から
なり、少なくともシリンダヘッド及びブロックの接合面
に接する金属板表面にシール材層を被覆したシリンダヘ
ッドガスケットにおいて、シリンダヘッド及びブロック
の接合面の中の熱膨張が大きい側の接合面に接する金属
板表面における燃焼室用開口の周り及び液体通路穴の周
りの高面圧部位並びにガスケットの周縁部を輪廻する周
縁シール部位に硬質のシール材層を被覆し、上記高面圧
部位及び周縁シール部位に隣接する比較的低面圧の部位
に軟質のシール材層を被覆したことを特徴とするシリン
ダヘッドガスケット。5. A sealant layer made of a single or a plurality of metal plates having a combustion chamber opening, a liquid passage hole, and a bolt hole for inserting a bolt, and at least a surface of the metal plate in contact with a joint surface of a cylinder head and a block. In the cylinder head gasket coated with, a high surface pressure portion around the combustion chamber opening and the liquid passage hole in the metal plate surface in contact with the joint surface on the side of large thermal expansion in the joint surface of the cylinder head and the block, and A hard sealing material layer was coated on the peripheral sealing portion that revolves around the peripheral portion of the gasket, and a soft sealing material layer was coated on the relatively low surface pressure portion adjacent to the high surface pressure portion and the peripheral sealing portion. Characteristic cylinder head gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12073495A JP3688013B2 (en) | 1995-04-20 | 1995-04-20 | Cylinder head gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12073495A JP3688013B2 (en) | 1995-04-20 | 1995-04-20 | Cylinder head gasket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08291865A true JPH08291865A (en) | 1996-11-05 |
| JP3688013B2 JP3688013B2 (en) | 2005-08-24 |
Family
ID=14793671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12073495A Expired - Fee Related JP3688013B2 (en) | 1995-04-20 | 1995-04-20 | Cylinder head gasket |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3688013B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1083371A2 (en) | 1999-09-08 | 2001-03-14 | Ishikawa Gasket Co. Ltd. | Cylinder head gasket with gas releasing portion |
-
1995
- 1995-04-20 JP JP12073495A patent/JP3688013B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1083371A2 (en) | 1999-09-08 | 2001-03-14 | Ishikawa Gasket Co. Ltd. | Cylinder head gasket with gas releasing portion |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3688013B2 (en) | 2005-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5427388A (en) | Metallic gasket | |
| EP1275889A2 (en) | Cylinder head gasket | |
| JP2002054745A (en) | Head gasket | |
| US20080197579A1 (en) | Laminate-type gasket | |
| US5310197A (en) | Gasket construction | |
| EP0892199B1 (en) | Metal laminate gasket with wide and narrow flange portions | |
| JP3094284B2 (en) | Metal gasket | |
| EP0787934B1 (en) | Metal laminate gasket with different coating layers | |
| KR0174743B1 (en) | A steel laminate gasket with wide sealing area | |
| US6986516B2 (en) | Metal gasket with partial coating | |
| US6318733B1 (en) | Metal laminate gasket with elastic auxiliary sealing member | |
| JPH10281289A (en) | Cylinder head gasket | |
| JP3369648B2 (en) | gasket | |
| EP0486150B2 (en) | Steel laminate gasket with seal protecting member | |
| JPH08291865A (en) | Cylinder head gasket | |
| EP0431227B1 (en) | A steel laminate gasket | |
| JPH051727Y2 (en) | ||
| EP0713989B1 (en) | Metal laminate type cylinder head gasket with heat preventing portion | |
| JP3769523B2 (en) | Cylinder head gasket | |
| JP2002054742A (en) | Head gasket | |
| JPH08303595A (en) | Metallic gasket | |
| JPH0642135Y2 (en) | Metallic laminated gasket for cylinder head | |
| JP2640803B2 (en) | Metal gasket | |
| JPH0835560A (en) | Cylinder head gasket | |
| JPH10196791A (en) | Metallic gasket |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20031219 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20040113 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20040315 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040615 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20040816 |
|
| A911 | Transfer of reconsideration by examiner before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20041005 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20050510 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20050607 |
|
| R150 | Certificate of patent (=grant) or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090617 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090617 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100617 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110617 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110617 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120617 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120617 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130617 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130617 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140617 Year of fee payment: 9 |
|
| LAPS | Cancellation because of no payment of annual fees |