EP1053420A1 - Cylinder-head gasket for internal combustion engine - Google Patents

Cylinder-head gasket for internal combustion engine

Info

Publication number
EP1053420A1
EP1053420A1 EP99902591A EP99902591A EP1053420A1 EP 1053420 A1 EP1053420 A1 EP 1053420A1 EP 99902591 A EP99902591 A EP 99902591A EP 99902591 A EP99902591 A EP 99902591A EP 1053420 A1 EP1053420 A1 EP 1053420A1
Authority
EP
European Patent Office
Prior art keywords
metal plates
cylinder head
head gasket
plates
bridges
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.)
Withdrawn
Application number
EP99902591A
Other languages
German (de)
French (fr)
Inventor
Alexis Combet
Francis Martin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Federal Mogul Sealing Systems GmbH
Solyem SAS
Original Assignee
Federal Mogul Sealing Systems GmbH
Federal Mogul Sealing Systems SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Federal Mogul Sealing Systems GmbH, Federal Mogul Sealing Systems SAS filed Critical Federal Mogul Sealing Systems GmbH
Publication of EP1053420A1 publication Critical patent/EP1053420A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
    • F16J15/0818—Flat gaskets
    • F16J15/0825—Flat gaskets laminated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
    • F16J15/0818—Flat gaskets
    • F16J2015/085—Flat gaskets without fold over
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
    • F16J15/0818—Flat gaskets
    • F16J2015/0856—Flat gaskets with a non-metallic coating or strip

Definitions

  • the present invention relates to a cylinder head gasket for an internal combustion engine.
  • a cylinder head gasket is intended to be mounted between the engine block and the cylinder head of an engine, in order to ensure leaktightness at the level of the combustion chambers, as well as leaktightness to fluids, and in particular coolant and liquid engine lubrication.
  • the sealing conditions are different, depending on whether the gas tightness is to be carried out at high temperature around the combustion chambers, or the fluid tightness outside the combustion chambers.
  • the object of the invention is to provide a cylinder head gasket obtained from a reduced number of elements, and which has excellent sealing properties both for gases and for fluids.
  • the cylinder head gasket which it relates to of the type comprising metal plates forming the core of the gasket and elastomeric cords intended to ensure leaktightness to fluids, such as cooling water and oil, is characterized in what he understands:
  • This joint is of simple structure, insofar as it comprises only three elements, two metal plates and an elastomeric bead.
  • the elastomeric cord which assembles the two metal plates ensures fluid tightness by being trapped in the metal plates, allowing them to play the role of clamping stops.
  • the bridges of the two metal plates are alternated from one plate to the other, in order to occupy offset positions after assembly of the two plates, and the bridges of each metal plate are offset from the median plane thereof, so as to be located substantially mid-thickness of the joint in the assembled position of the two metal plates.
  • the lateral blocking means of the two metal plates consist of corresponding bosses formed therein and intended to be fitted into each other, in the superposed position of the two plates. These lateral locking means of the two plates are effective before the two plates are assembled by the elastomer sealing bead.
  • each sealing bead has, seen in cross section, at least one rib projecting from each face of the joint, and at least one rib situated behind each face of the seal.
  • the two metal plates have ribs oriented in opposite directions, constituting the rings of fire, surrounding the openings corresponding to the combustion chambers.
  • Figure 1 is a partial perspective view of a cylinder head gasket
  • Figure 2 is an exploded perspective view of the two metal plates constituting this cylinder head gasket
  • Figures 3 and 4 are two views in cross section and on an enlarged scale of this cylinder head gasket, respectively along the lines III-III and IV-IV of Figure 1.
  • the cylinder head gasket according to the invention consists of three elements, two similar metal plates forming the core of the gasket and an elastomeric sealing bead.
  • the metal plates consist of an upper plate 2 and a lower plate 3.
  • Each plate has openings 4 corresponding to the combustion chambers, 5 for the passage of lubricating oil, 6 for the passage of cooling water and 7 for tighten the seal between the engine block and the cylinder head.
  • the plates 2 and 3 have inverted ribs 8 at the combustion chambers, in order to form rings of fire.
  • the metal plates 2 and 3 also include a certain number of bosses 9 obtained by stamping, the bosses 9 of the plate 3 being intended to be engaged in the female part of the bosses 9 of the plate 2, as shown in particular in FIG. 4. These bosses 9 allow, in the superimposed position of the two plates 2 and 3, to ensure lateral locking thereof.
  • Each plate 2, 3 comprises a central main part and a peripheral part separated from each other by a slot 10. The connection between the central part and the peripheral part is produced by means of bridges 12.
  • the bridges 12 of the two plates 2 and 3 are alternated from one plate to another, in order to occupy offset positions, after assembly of the two plates.
  • the bridges 12 of each metal plate 2, 3 are offset with respect to the median plane of this plate so as to be located substantially at mid-thickness of the joint in the assembled position of the two metal plates.
  • an elastomeric bead 13 is molded inside the slots 10. As shown in Figures 3 and 4, this cord connects the two plates in the areas where there are no bridges, and covers the bridges in the areas where one of the two plates has a connecting bridge between the central part and the outer part. As shown in particular in Figures 3 and 4, the elastomeric bead comprises, seen in cross section, two ribs 14 projecting from each face of the two plates 2, 3, as well as grooves 15 disposed set back from the two faces of the joint.
  • the elastomeric cord 13 When tightening the seal between the engine block and the cylinder head, the elastomeric cord 13 will be compressed, without risk of being damaged and losing its sealing qualities, insofar as the cord can be compressed in the thickness of the gasket, the metal plates ensuring the function of clamping stops.
  • the invention brings a great improvement to the existing technique by providing a cylinder head gasket for thermal engines, of simple structure and having excellent reliability.

Abstract

The invention concerns two superposed similar metal plates (2, 3), whereof each comprises a main central part and a peripheral part separated from each other by a slot (10) designed to receive an elastomer seal bead (13), the two parts of each plate being locally connected by bridges (129, the coincident slots of the two superposed metal plates lined with the same elastomer seal bead (13) overlapping the joint two surfaces, means for laterally blocking (9) the two metal plates.

Description

JOINT DE CULASSE POUR MOTEUR A COMBUSTION INTERNE CYLINDER HEAD GASKET FOR INTERNAL COMBUSTION ENGINE
La présente invention a pour objet un joint de culasse pour moteur à combustion interne.The present invention relates to a cylinder head gasket for an internal combustion engine.
Un joint de culasse est destiné à être monté entre le bloc moteur et la culasse d'un moteur, afin d'assurer l'étancheite au niveau des chambres de combustion, ainsi que l'étancheite aux fluides, et notamment liquide de refroidissement et liquide de lubrification du moteur.A cylinder head gasket is intended to be mounted between the engine block and the cylinder head of an engine, in order to ensure leaktightness at the level of the combustion chambers, as well as leaktightness to fluids, and in particular coolant and liquid engine lubrication.
Les conditions d'étanchéité sont différentes, suivant qu'il s'agit de réaliser l'étancheite aux gaz, à haute température, autour des chambres de combustion, ou l'étancheite aux fluides, à l'extérieur des chambres de combustion.The sealing conditions are different, depending on whether the gas tightness is to be carried out at high temperature around the combustion chambers, or the fluid tightness outside the combustion chambers.
De ce fait, l'étancheite aux gaz est réalisée par des anneaux de feu métalliques, tandis que l'étancheite aux fluides est réalisée par des cordons en élastomère. II est déjà connu de réaliser des joints de culasse à l'aide de plaques métalliques qui constituent l'âme du joint. Les cordons d'élastomère destinés à assurer l'étancheite aux fluides sont déposés sur les deux faces du joint, par exemple par des techniques de sérigraphie, ou de surmoulage, à l'intérieur de rainures ménagées sur les deux faces de la plaque.Therefore, gas tightness is achieved by metal fire rings, while fluid tightness is achieved by elastomeric cords. It is already known to produce cylinder head gaskets using metal plates which constitute the core of the joint. The elastomer cords intended to ensure fluid tightness are deposited on the two faces of the joint, for example by screen printing techniques, or overmolding, inside grooves made on the two faces of the plate.
Si ces cordons en élastomère assurent une bonne étanchéité aux fluides, ils présentent l'inconvénient d'être vulnérables lorsque le joint est serré entre le bloc moteur et la culasse. En effet, si le serrage dépasse une valeur prédéterminée, les cordons éclatent et perdent leur fonction d'étanchéité. Pour éviter cette dégradation, il convient de prévoir des butées de serrage sur le joint.If these elastomer cords provide good fluid tightness, they have the disadvantage of being vulnerable when the seal is tight between the engine block and the cylinder head. Indeed, if the tightening exceeds a predetermined value, the cords burst and lose their sealing function. To avoid this degradation, it is necessary to provide clamping stops on the joint.
Le but de l'invention est de fournir un joint de culasse obtenu à partir d'un nombre réduit d'éléments, et qui possède d'excellentes propriétés d'étanchéité tant aux gaz qu'aux fluides. A cet effet, le joint de culasse qu'elle concerne, du type comportant des plaques métalliques formant l'âme du joint et des cordons élastomères destinés à assurer l'étancheite aux fluides, tels qu'eau de refroidissement et huile, est caractérisé en ce qu'il comprend :The object of the invention is to provide a cylinder head gasket obtained from a reduced number of elements, and which has excellent sealing properties both for gases and for fluids. To this end, the cylinder head gasket which it relates to, of the type comprising metal plates forming the core of the gasket and elastomeric cords intended to ensure leaktightness to fluids, such as cooling water and oil, is characterized in what he understands:
- deux plaques métalliques similaires superposées, dont chacune comprend une partie principale centrale et une partie périphérique séparées l'une de l'autre par une fente destinée à recevoir un cordon élastomère d'étanchéité, les deux parties de chaque plaque étant reliées localement par des ponts,- two similar superimposed metal plates, each of which comprises a central main part and a peripheral part separated from each other by a slot intended to receive a cord sealing elastomer, the two parts of each plate being connected locally by bridges,
- un même cordon élastomère d'étanchéité débordant des deux faces du joint, garnissant les fentes coïncidantes des deux plaques métalliques superposées,- the same elastomeric sealing bead extending from the two faces of the seal, lining the coincident slots of the two superimposed metal plates,
- des moyens de blocage latéral des deux plaques métalliques. Ce joint est de structure simple, dans la mesure où il ne comporte que trois éléments, deux plaques métalliques et un cordon élastomère. Le cordon élastomère qui réalise l'assemblage des deux plaques métalliques, assure l'étancheite aux fluides en étant emprisonné dans les plaques métalliques, permettant à celles-ci de jouer le rôle de butées de serrage.- means for lateral locking of the two metal plates. This joint is of simple structure, insofar as it comprises only three elements, two metal plates and an elastomeric bead. The elastomeric cord which assembles the two metal plates, ensures fluid tightness by being trapped in the metal plates, allowing them to play the role of clamping stops.
Afin d'assurer une continuité du cordon d'étanchéité, les ponts des deux plaques métalliques sont alternés d'une plaque à l'autre, afin d'occuper des positions décalées après assemblage des deux plaques, et les ponts de chaque plaque métallique sont décalés par rapport au plan médian de celle-ci, afin d'être situés sensiblement à mi-épaisseur du joint en position assemblée des deux plaques métalliques.In order to ensure continuity of the sealing bead, the bridges of the two metal plates are alternated from one plate to the other, in order to occupy offset positions after assembly of the two plates, and the bridges of each metal plate are offset from the median plane thereof, so as to be located substantially mid-thickness of the joint in the assembled position of the two metal plates.
Suivant une autre caractéristique de l'invention, les moyens de blocage latéral des deux plaques métalliques sont constitués par des bossages correspondants ménagés dans celles-ci et destinés à être emboîtés les uns dans les autres, en position superposée des deux plaques. Ces moyens de blocage latéral des deux plaques sont effectifs avant que les deux plaques ne soient assemblées par le cordon d'étanchéité en élastomère.According to another characteristic of the invention, the lateral blocking means of the two metal plates consist of corresponding bosses formed therein and intended to be fitted into each other, in the superposed position of the two plates. These lateral locking means of the two plates are effective before the two plates are assembled by the elastomer sealing bead.
Avantageusement, afin de permettre une bonne déformation du joint sans détérioration de celui-ci, chaque cordon d'étanchéité présente, vu en coupe transversale, au moins une nervure dépassant de chaque face du joint, et au moins une nervure située en retrait de chaque face du joint. Suivant une autre caractéristique de l'invention, les deux plaques métalliques comportent des nervures orientées de façon opposée, constituant les anneaux de feu, entourant les ouvertures correspondant aux chambres de combustion.Advantageously, in order to allow good deformation of the joint without deterioration of the latter, each sealing bead has, seen in cross section, at least one rib projecting from each face of the joint, and at least one rib situated behind each face of the seal. According to another characteristic of the invention, the two metal plates have ribs oriented in opposite directions, constituting the rings of fire, surrounding the openings corresponding to the combustion chambers.
De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemple non limitatif, une forme d'exécution d'un joint de culasse :In any case, the invention will be clearly understood with the aid of the description which follows, with reference to the attached schematic drawing representing, by way of nonlimiting example, an embodiment of a cylinder head gasket:
Figure 1 est une vue partielle en perspective d'un joint de culasse ; Figure 2 est une vue en perspective éclatée des deux plaques métalliques constitutives de ce joint de culasse ;Figure 1 is a partial perspective view of a cylinder head gasket; Figure 2 is an exploded perspective view of the two metal plates constituting this cylinder head gasket;
Figures 3 et 4 sont deux vues en coupe transversale et à échelle agrandie de ce joint de culasse, suivant respectivement les lignes lll-lll et IV-IV de figure 1 . Le joint de culasse selon l'invention est constitué à partir de trois éléments, deux plaques métalliques similaires formant l'âme du joint et un cordon élastomère d'étanchéité. Les plaques métalliques sont constituées par une plaque supérieure 2 et une plaque inférieure 3. Chaque plaque possède des ouvertures 4 correspondant aux chambres de combustion, 5 pour le passage d'huile de lubrification, 6 pour le passage d'eau de refroidissement et 7 pour assurer le serrage du joint entre le bloc moteur et la culasse. Les plaques 2 et 3 possèdent des nervures 8 inversées au niveau des chambres de combustion, afin de former des anneaux de feu. Les plaques métalliques 2 et 3 comportent également un certain nombre de bossages 9 obtenus par emboutissage, les bossages 9 de la plaque 3 étant destinés à être engagés dans la partie femelle des bossages 9 de la plaque 2, comme montré notamment à la figure 4. Ces bossages 9 permettent, en position superposée des deux plaques 2 et 3, d'assurer un blocage latéral de celles-ci. Chaque plaque 2, 3 comprend une partie principale centrale et une partie périphérique séparée l'une de l'autre par une fente 10. La liaison entre la partie centrale et la partie périphérique est réalisée par l'intermédiaire de ponts 12.Figures 3 and 4 are two views in cross section and on an enlarged scale of this cylinder head gasket, respectively along the lines III-III and IV-IV of Figure 1. The cylinder head gasket according to the invention consists of three elements, two similar metal plates forming the core of the gasket and an elastomeric sealing bead. The metal plates consist of an upper plate 2 and a lower plate 3. Each plate has openings 4 corresponding to the combustion chambers, 5 for the passage of lubricating oil, 6 for the passage of cooling water and 7 for tighten the seal between the engine block and the cylinder head. The plates 2 and 3 have inverted ribs 8 at the combustion chambers, in order to form rings of fire. The metal plates 2 and 3 also include a certain number of bosses 9 obtained by stamping, the bosses 9 of the plate 3 being intended to be engaged in the female part of the bosses 9 of the plate 2, as shown in particular in FIG. 4. These bosses 9 allow, in the superimposed position of the two plates 2 and 3, to ensure lateral locking thereof. Each plate 2, 3 comprises a central main part and a peripheral part separated from each other by a slot 10. The connection between the central part and the peripheral part is produced by means of bridges 12.
Comme montré notamment à la figure 3, les ponts 12 des deux plaques 2 et 3 sont alternés d'une plaque à l'autre, afin d'occuper des positions décalées, après assemblage des deux plaques. En outre, les ponts 12 de chaque plaque métallique 2, 3 sont décalés par rapport au plan médian de cette plaque afin d'être situés sensiblement à mi-épaisseur du joint en position assemblée des deux plaques métalliques.As shown in particular in Figure 3, the bridges 12 of the two plates 2 and 3 are alternated from one plate to another, in order to occupy offset positions, after assembly of the two plates. In addition, the bridges 12 of each metal plate 2, 3 are offset with respect to the median plane of this plate so as to be located substantially at mid-thickness of the joint in the assembled position of the two metal plates.
Une fois les deux plaques métalliques 2, 3 superposées, il est procédé au moulage d'un cordon élastomère 13 à l'intérieur des fentes 10. Comme montré aux figures 3 et 4, ce cordon relie les deux plaques dans les zones où il n'y a pas de ponts, et recouvrent les ponts dans les zones où l'une des deux plaques présente un pont de liaison entre la partie centrale et la partie extérieure. Comme montré notamment aux figures 3 et 4, le cordon élastomère comporte, vu en coupe transversale, deux nervures 14 faisant saillie de chaque face des deux plaques 2, 3, ainsi que des rainures 15 disposées en retrait des deux faces du joint.Once the two metal plates 2, 3 are superimposed, an elastomeric bead 13 is molded inside the slots 10. As shown in Figures 3 and 4, this cord connects the two plates in the areas where there are no bridges, and covers the bridges in the areas where one of the two plates has a connecting bridge between the central part and the outer part. As shown in particular in Figures 3 and 4, the elastomeric bead comprises, seen in cross section, two ribs 14 projecting from each face of the two plates 2, 3, as well as grooves 15 disposed set back from the two faces of the joint.
Lors du serrage du joint entre le bloc moteur et la culasse, le cordon élastomère 13 va être comprimé, sans risque d'être détérioré et de perdre ses qualités d'étanchéité, dans la mesure où le cordon peut se comprimer dans l'épaisseur du joint, les plaques métalliques assurant la fonction de butées de serrage.When tightening the seal between the engine block and the cylinder head, the elastomeric cord 13 will be compressed, without risk of being damaged and losing its sealing qualities, insofar as the cord can be compressed in the thickness of the gasket, the metal plates ensuring the function of clamping stops.
Comme il ressort de ce qui précède, l'invention apporte une grande amélioration à la technique existante en fournissant un joint de culasse pour moteurs thermiques, de structure simple et possédant une excellente fiabilité.As is apparent from the above, the invention brings a great improvement to the existing technique by providing a cylinder head gasket for thermal engines, of simple structure and having excellent reliability.
Comme il va de soi, l'invention ne se limite pas à la seule forme d'exécution de ce joint, décrite ci-dessus à titre d'exemple, elle en embrasse au contraire toutes les variantes. C'est ainsi notamment que les moyens de blocage latéral des deux plaques métalliques 2, 3 pourraient être constitués non pas par des bossages, mais par des points de soudure, sans que l'on sorte pour autant du cadre de l'invention. It goes without saying that the invention is not limited to the sole embodiment of this joint, described above by way of example, on the contrary, it embraces all of its variants. Thus in particular that the lateral locking means of the two metal plates 2, 3 could be constituted not by bosses, but by welding points, without departing from the scope of the invention.

Claims

REVENDICATIONS
1. Joint de culasse pour moteur à combustion interne, du type comportant des plaques métalliques formant l'âme du joint et des cordons élastomères destinés à assurer l'étancheite aux fluides, tels qu'eau de refroidissement et huile, caractérisé en ce qu'il comprend :1. Cylinder head gasket for an internal combustion engine, of the type comprising metal plates forming the core of the gasket and elastomeric cords intended to seal fluid, such as cooling water and oil, characterized in that He understands :
- deux plaques métalliques similaires (2, 3) superposées, dont chacune comprend une partie principale centrale et une partie périphérique séparées l'une de l'autre par une fente (10) destinée à recevoir un cordon élastomère d'étanchéité ( 13), les deux parties de chaque plaque étant reliées localement par des ponts (12),- two superimposed similar metal plates (2, 3), each of which comprises a central main part and a peripheral part separated from each other by a slot (10) intended to receive an elastomeric sealing bead (13), the two parts of each plate being connected locally by bridges (12),
- un même cordon élastomère (13) d'étanchéité débordant des deux faces du joint, garnissant les fentes coïncidantes des deux plaques métalliques superposées (2, 3),- the same elastomeric sealing bead (13) projecting from the two faces of the seal, lining the coincident slots of the two superimposed metal plates (2, 3),
- des moyens de blocage latéral (9) des deux plaques métalliques.- lateral locking means (9) of the two metal plates.
2. Joint de culasse selon la revendication 1 , caractérisé en ce que les ponts (12) des deux plaques métalliques (2, 3) sont alternés d'une plaque à l'autre, afin d'occuper des positions décalées après assemblage des deux plaques. 2. cylinder head gasket according to claim 1, characterized in that the bridges (12) of the two metal plates (2, 3) are alternated from one plate to another, in order to occupy offset positions after assembly of the two plates.
3. Joint de culasse selon l'une quelconque des revendications 1 et 2, caractérisé en ce que les ponts ( 12) de chaque plaque métallique (2, 3) sont décalés par rapport au plan médian de celle-ci, afin d'être situés sensiblement à mi-épaisseur du joint en position assemblée des deux plaques métalliques (2, 3). 3. cylinder head gasket according to any one of claims 1 and 2, characterized in that the bridges (12) of each metal plate (2, 3) are offset from the median plane thereof, so as to be located substantially mid-thickness of the joint in the assembled position of the two metal plates (2, 3).
4. Joint de culasse selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les moyens de blocage latéral des deux plaques métalliques (2, 3) sont constitués par des bossages (9) correspondants ménagés dans celles-ci et destinés à être emboîtés les uns dans les autres, en position superposée des deux plaques. 4. cylinder head gasket according to any one of claims 1 to 3, characterized in that the lateral locking means of the two metal plates (2, 3) are constituted by corresponding bosses (9) formed therein and intended to be fitted into each other, in the superimposed position of the two plates.
5. Joint de culasse selon l'une quelconque des revendications 1 à 4, caractérisé en ce que chaque cordon d'étanchéité (13) présente, vu en coupe transversale, au moins une nervure (14) dépassant de chaque face du joint, et au moins une nervure (15) située en retrait de chaque face du joint. 5. cylinder head gasket according to any one of claims 1 to 4, characterized in that each sealing bead (13) has, seen in cross section, at least one rib (14) projecting from each face of the gasket, and at least one rib (15) located behind each side of the seal.
6. Joint de culasse selon l'une quelconque des revendications 1 à 5, caractérisé en ce que les deux plaques métalliques comportent des nervures (8) orientées de façon opposée, constituant les anneaux de feu, entourant les ouvertures (4) correspondant aux chambres de combustion. 6. cylinder head gasket according to any one of claims 1 to 5, characterized in that the two metal plates comprise ribs (8) oriented in opposite directions, constituting the rings of fire, surrounding the openings (4) corresponding to the combustion chambers.
EP99902591A 1998-02-05 1999-02-04 Cylinder-head gasket for internal combustion engine Withdrawn EP1053420A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9801573 1998-02-05
FR9801573A FR2774430B1 (en) 1998-02-05 1998-02-05 CYLINDER HEAD GASKET FOR INTERNAL COMBUSTION ENGINE
PCT/FR1999/000241 WO1999040346A1 (en) 1998-02-05 1999-02-04 Cylinder-head gasket for internal combustion engine

Publications (1)

Publication Number Publication Date
EP1053420A1 true EP1053420A1 (en) 2000-11-22

Family

ID=9522813

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99902591A Withdrawn EP1053420A1 (en) 1998-02-05 1999-02-04 Cylinder-head gasket for internal combustion engine

Country Status (7)

Country Link
US (1) US6371489B1 (en)
EP (1) EP1053420A1 (en)
JP (1) JP2002502945A (en)
KR (1) KR20010032455A (en)
BR (1) BR9908356A (en)
FR (1) FR2774430B1 (en)
WO (1) WO1999040346A1 (en)

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Publication number Priority date Publication date Assignee Title
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US6371489B1 (en) 2002-04-16
FR2774430A1 (en) 1999-08-06
JP2002502945A (en) 2002-01-29
BR9908356A (en) 2001-10-02
KR20010032455A (en) 2001-04-25
WO1999040346A1 (en) 1999-08-12
FR2774430B1 (en) 2000-04-21

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