Cylinder head gasket
View Patent ↗A gasket system is described and depicting having a gasket located between and sealing a cylinder head and a cylinder block. The gasket has a first metal layer and a second metal layer adjacent said first metal layer. The second metal layer has a bead region and a stopper region. At least a portion of the bead region has a predetermined tensile strength and a predetermined range of yield strength.
1. A gasket system, comprising:
a cylinder head assembly;
a cylinder block assembly; and
a gasket located between and sealing said cylinder head and said cylinder block, said gasket having a plurality of cylinder apertures, bolt apertures and jacket apertures, said gasket comprising a first metal layer and a second metal layer adjacent said first metal layer, said second metal layer having a bead region and a stopper region, wherein said bead region is formed of a stainless steel, wherein at least a portion of said bead region has a predetermined tensile strength in a range of about 1000 MPA to about 1150 MPA, and a predetermined range of yield strength, wherein said yield strength is greater than about 90% of said tensile strength, wherein approximately 70% of said tensile strength of about 1000 MPA to about 1150 MPA and approximately 70% of said yield strength is throughout the operating conditions of an internal combustion engine for a vehicle.
2. The gasket system of claim 1 , wherein said tensile strength of about 1000 MPA to about 1150 MPA is measured at about 70 degrees F., and said bead region has a tensile strength of greater than about 700 MPA at about 1600 degrees F.
3. The gasket system of claim 1 , wherein said yield strength of greater than about 90% of said tensile strength is measured at about 70 degrees F., and said bead region has a yield strength greater than about 630 MPA at about 1600 degrees F.
4. The gasket system of claim 1 , wherein said bead region surrounds at least one of said cylinder apertures.
5. The gasket system of claim 1 , wherein said bead region selectively moves relative to the cylinder block assembly.
6. The gasket system of claim 1 , wherein all portions of said metal layer have a predetermined tensile strength in a range of about 1000 MPA to about 1150 MPA, and a predetermined range of yield strength is greater than about 90% of said tensile strength.
7. The gasket system of claim 1 , wherein said stopper region circumscribes said bead region.
8. The gasket system of claim 1 , wherein said second metal layer is a single sheet of metal forming a cylinder region surface, said bead region and said stopper region.
9. The gasket system of claim 1 , wherein said bead region is axially compressible and radially movable.
10. The gasket system of claim 1 , wherein said first metal layer is a single sheet of substantially planar metal.
11. A gasket system, comprising:
a cylinder head assembly;
a cylinder block assembly; and
a gasket located between and sealing said cylinder head and said cylinder block, said gasket having a plurality of cylinder apertures, bolt apertures and jacket apertures, said gasket comprising a first metal layer and a second metal layer adjacent said first metal layer, said second metal layer having a bead region and a stopper region, wherein said bead region is formed of a nickel based alloy, wherein at least a portion of said bead region has a predetermined tensile strength in a range of about 1000 MPA to about 1150 MPA, and a predetermined range of yield strength, wherein said yield strength is greater than about 90% of said tensile strength, wherein approximately 70% of said tensile strength of about 1000 MPA to about 1150 MPA and approximately 70% of said yield strength is throughout the operating conditions of an internal combustion engine for a vehicle.