| 摘要 |
PROBLEM TO BE SOLVED: To balance and equalize bearing pressure generated in a skirt part of a bead of a metal laminated type cylinder head gasket, by using a difference in a radius of curvature of an asymmetrical bead. SOLUTION: The cylinder head gasket is formed by laminating first to third metallic plates 11 to 13. The asymmetrical bead 14 is formed around a combustion chamber hole 16 in the first metallic plate 11, and the other metallic plate is laminated on the projecting part side of the asymmetrical bead. The asymmetrical bead 14 is constituted so that the relationship between a width (a) of a bead part 14b being larger in a radius of curvature on the combustion chamber hole 16 side than a bead top 14a and a width (b) of a bead part 14c being smaller in a radius of curvature on the opposite side than the bead top, is set at a>b, and the minimum radius of curvature R in the bead is set at R≥0.5 mm, and the relationship between the width (a) of the bead part 14b and the radius of curvature R is set at a≥2R. COPYRIGHT: (C)2008,JPO&INPIT
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