Toyota Jidosha Kabushiki Kaisha

Nippon Gasket Company, Ltd.

Yasumaro Takeda

Kazuya Yoshijima

Yoshihiko Masuda

Ryosuke Fujiki

Toru Takasu

Shigeo Kiyoi

A cylinder head gasketis sandwiched between a cylinder headand a cylinder blockwith a cylinder boreand includes a substratewith a combustion chamber holedrilled at a position of the cylinder bore, and seal platesto, the substrateand the seal plates are stacked on one another. Fixation membersandare secured to the substrate around a periphery of the combustion chamber hole. The seal plates include an engagement holeformed therein and with which the fixation members are engaged. The engagement hole is engaged with the fixation members. The fixation members are sandwiched between the cylinder head and the cylinder block. The cylinder head and the cylinder block can be firmly coupled together via the fixation members.

Cylinder head gasket

A cylinder head gasket includes a first gasket base plate at a cylinder head side, a second gasket base plate at a cylinder block side, a shim that adjusts the gasket thickness, and a pressure increasing plate that increases the surface pressure at the side of periphery portions of the cylinders. In the first and second gasket base plates full beads are swollen at the side of periphery portions of cylinders, and half beads are swollen at a site outward of the full beads. The full beads of the first and second gasket base plates are formed so that top portions of the full beads face each other at positions that are opposite to each other in the up-down direction. The shim and the pressure increasing plate are sandwiched between the top portions.

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Toyota, Japan

Yasumaro Takeda