Nippon Reinz Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Jidoshokki

Tetsuya Hida

Kazuya Yoshijima

Katsuhide Fujisawa

Eiichi Tahara

Yoshihiro Okuno

Tsutomu Endou

The thickness of an intermediate plate portion () is smaller than the thickness of a stopper portion (). The thickness of a portion of a cylinder head gasket () having the stopper portion () is set to be greater than the thickness of other portions of the cylinder head gasket (). Before the cylinder head gasket () is provided between contact surfaces (), a space (S) is formed between the stopper portion () and an adjustment stopper portion (), and the intermediate plate portion () partially contacts the adjustment plate portion, and a bead () contacts the adjustment plate portion ().

Cylinder head gasket and engine

A laminated metal gasket used as a cylinder head gasket for an internal combustion engine, disposed between a pair of joint surfaces having at least one hole to be sealed comprising at least one intermediate plate made of a metal plate, and a pair of surface plates made of elastic metal plates, such as steel plates or stainless steel plates, laminated on both sides of the intermediate plate, the intermediate plate and the surface plates each having at least one hole portion corresponding to the hole to be sealed, the intermediate plate being equipped with a folded portion which is made by folding back the inner peripheral edge portion around the hole portion to the joint surface subjected to more significant distortion and deformation during operation among the pair of joint surfaces, and the surface plates each being equipped with a bead surrounding the hole portion outside the folded portion, the bead of the surface plate coming into contact with the joint surface to be subjected to more significant distortion and deformation is made higher than that of the surface plate coming into contact with the other joint surface.

Laminated metal gasket with diverse bead height

Growing community of inventors

Yamato, Japan

Tetsuya Hida