Abstract
Efforts to improve engine performance have led to a tendency to increase the maximum combustion pressure (Pmax) in an engine. This leads to the cylinder head gasket sealing being exposed to tough conditions which can result in gas leakage. This problem has become important in recent years and its solution is required. In the present study, the relationship between the deformation in the lower surface of the cylinder head due to Pmax and the primary seal part of a gasket which is the edge of the circumference of a cylinder is discussed. The reinforcement of the secondary seal part in the gasket structure which is a new viewpoint in gasket sealing and its validity are also discussed.
