Sealing structure for cylinder and cylinder head in reciprocating type internal combustion engine and assembling method thereof

A sealing structure for a cylinder and a cylinder head in a reciprocating type internal combustion engine comprising:

• a gasket interposed between said cylinder and said cylinder head, said cylinder and said cylinder head being removably connected to each other;
• said gasket being formed in a ring-shape and being disposed at an edge portion of a cylinder bore of said cylinder on a side being brought into contact with said cylinder head;
• the edge portion of said cylinder bore on the side being brought in contact with said cylinder head has a notched inclined surface having an inside diameter gradually enlarged from an inner peripheral surface of said cylinder bore to the contact surface between said cylinder bore and said cylinder head;
• an outer peripheral portion of said ring-like gasket on a cylinder side has a taperingly inclined surface capable of being brought into close contact with the notched inclined surface of said cylinder bore;
• and
• wherein said gasket includes a generally planar end surface, said generally planar end surface being generally coplanar with an upper end surface of said cylinder when said cylinder and said cylinder head are connected to each other.

A sealing structure for a cylinder and a cylinder head in a reciprocating type internal combustion engine in which said cylinder and said cylinder head are sealed by drawing said cylinder and said cylinder head closer to each other comprising:

• a ring-like gasket being interposed between said cylinder and said cylinder head within a cylinder bore of said cylinder;
• an outer peripheral surface of said ring-like gasket being formed into a taperingly inclined surface so that said ring-like gasket receives a compressive force along a circumferential direction of said ring-like gasket;
• at least one of said cylinder and said cylinder head includes an inclined surface brought into close contact with said taperingly inclined surface of said ring-like gasket by said compressive force;
• and
• wherein said ring-like gasket includes a generally planar, upper end surface, said generally planar, upper end surface being generally co-planar with an upper end surface of said cylinder and a lower end surface of said cylinder head when said cylinder head and cylinder are drawn close to each other.

A method for providing a sealing structure for a cylinder and a cylinder head in a reciprocating type internal combustion engine in which said cylinder and said cylinder head are sealed by drawing said cylinder and said cylinder head closer to each other comprising the following steps:

• forming an outer peripheral surface of a ring-like gasket into a taperingly inclined surface so that said ring-like gasket receives a compressive force along a circumferential direction of said ring-like gasket;
• interposing said ring-like gasket between said cylinder and said cylinder head within a cylinder bore of said cylinder;
• forming at least one of said cylinder and said cylinder head to include an inclined surface brought into close contact with said taperingly inclined surface of said ring-like gasket by said compressive force;
• clamping said gasket by said securing means through said cylinder and said cylinder head;
• and
• compressing a generally planar, upper end surface of said ring-like gasket during said clamping step to bring said generally planar, upper end surface into generally co-planar relationship with an upper end surface of said cylinder and a lower end surface of said cylinder head.