초록 ▼

The invention relates to the application of a projection to a metal layer of a metallic cylinder-head gasket for an internal-combustion engine having at least one elastic metal sheet, which is provided with one opening or a plurality of adjacent openings depending on the number of combustion chamber

The invention relates to the application of a projection to a metal layer of a metallic cylinder-head gasket for an internal-combustion engine having at least one elastic metal sheet, which is provided with one opening or a plurality of adjacent openings depending on the number of combustion chambers of the internal-combustion engine, a bead being provided in the at least one elastic metal sheet around each opening, at a distance from the latter, so that a straight section of sheet metal is left clear in the region of the edge of the opening, for which bead a spring travel limiter or stopper, which runs coaxially with respect to the bead and is formed by the projection, is provided, the projection being produced from a mixture which contains a plastic with a high mineral filler content. A mixture of an elastomer in particular with a filler which has been surface-treated by means of a silane is used.

대표청구항 ▼

1. A metallic cylinder-head gasket for an internal-combustion engine, comprising: at least one elastic metal sheet, including, at least one opening therethrough and a mechanically deformable metal sealing bead in the at least one elastic metal sheet around each opening at a distance from the open

1. A metallic cylinder-head gasket for an internal-combustion engine, comprising: at least one elastic metal sheet, including, at least one opening therethrough and a mechanically deformable metal sealing bead in the at least one elastic metal sheet around each opening at a distance from the opening; and a stopper projection comprising an elastomer and a mineral filler which has been surface-treated by a silane, wherein the stopper projection is substantially inelastic and functions to limit mechanical deformation of the metal sealing bead. 2. The cylinder-head gasket of claim 1, wherein the stopper projection an elastomer/filler ratio of 1:1 to 1:5. 3. A method for applying a stopper projection to a metal layer of a metallic cylinder-head gasket for an internal-combustion engine, comprising: providing the gasket having at least one elastic metal sheet provided with at least one opening depending on the number of combustion chambers of the internal-combustion engine, a sealing bead in the at least one elastic metal sheet around each opening, at a distance from the opening; forming a mixture which contains a high mineral filler which has been surface-treated by a silane and an elastomer; and applying the mixture to the metal layer to form the stopper projection associated with the bead. 4. The method according to claim 3, wherein the elastomer is one of the group consisting of fluororubber and fluorosilicone rubber. 5. The method according to claim 3, wherein the mixture has an elastomer/filler ratio of 1:1 to 1:5. 6. The method according to claim 3, wherein the filler is silica flour. 7. The method according to claim 6, wherein the mass of silica flour is in the range of approximately 10 to 100% of the mass of the elastomer. 8. The method according to claim 3, wherein the silane is one of the group consisting of an epoxysilane and an aminosilane. 9. The method according to claim 3, comprising adding the silane to the mixture as an adhesion promoter. 10. The method according to claim 3, comprising applying the mixture by screen-printing. 11. The method according to claim 3, comprising applying the mixture as a bead.