Patent ID: 7997585
Filing Date: 2011-08-16
Classification: F02F,F16J

Abstract:
1. In a metallic cylinder head gasket for an internal combustion engine having a cylinder block with adjacent combustion chambers separated by respective webs and a cylinder head connected to said block by bolts, having at least one sheet metal layer of resilient metal, which is provided with combustion chamber openings separated by respective gasket webs corresponding to the combustion chambers and webs of the internal combustion engine, and also fluid and bolt passage openings, where, around each combustion chamber opening, at a distance from the latter, leaving a plane sheet metal section in an edge area of the opening, a bead is provided, whose spring stroke is limited by a stopper having a height and width extending concentrically with respect to the bead, the improvement comprising that: said stopper has a varying height around said combustion chamber opening, dependent on both (a) variations in component stiffness of the gasket when bolted to the cylinder head and (b) variations in component thermal expansion at the operating temperature of the engine; and the height of the stopper at the center of the gasket web on a line connecting the centers of adjacent combustion chamber openings has a first, additive height contribution for compensation of component stiffness at the center of the web and a second, subtractive height contribution in the range of about 10 to 60 μm relative to said additive height contribution for compensation of thermal expansion at the center of the web.