Patent ID: 6036194
Filing Date: 2000-03-14
Classification: F16J

Abstract:
A combustion seal for sealing high pressure combustion gas within at least one cylinder of an internal combustion engine, comprising:a cylinder block having one or more cylindrical bores having corresponding central axes formed therein;a cylinder head having a top face and a bottom face, said cylinder head being rigidly attached to said cylinder block;a cylinder head gasket positioned in between said cylinder block and said cylinder head for enhancing the seal therebetween;a cylinder liner having a top face and pressure fitted into at least one of said bores formed in said cylinder block, said cylinder liner having a groove formed in said top face, said groove having a first sidewall and a second sidewall positioned radially outward of said first sidewall, said second sidewall having a first section oriented generally parallel with the central axis of the cylindrical bore and a second section inclined in cross-section at an angle less than 90.degree. with respect to said first section to form a ridge at the intersection of said first and second sections; anda metal O-ring positioned in said groove formed in said cylinder liner, said O-ring being in an abutting relationship with said second sidewall of said groove, said O-ring having a curvilinear cross-section;wherein said O-ring is compressed when said cylinder head is secured on said cylinder block such that said curvilinear cross-section of said O-ring is deformed including deformation around said ridge to create at least a three point seal.