Patent ID: 8042815

Claim:
A cylinder head gasket that is provided between a contact surface of a cylinder head and a contact surface of a cylinder block, which are connected to each other, wherein the cylinder block has a cylinder bore, and a combustion chamber opening is formed in the cylinder head gasket so as to correspond to the cylinder bore, the cylinder head gasket being characterized by: an intermediate plate having a stopper portion that is provided around the combustion chamber opening, the intermediate plate having an intermediate plate portion that is positioned at the outer side of the stopper portion with respect to the combustion chamber opening, wherein the thickness of the intermediate plate portion is smaller than the thickness of the stopper portion, and an intermediate step is formed, as a step portion, at the boundary between the stopper portion and the intermediate plate portion; an adjustment plate that is provided closer to the cylinder head or to the cylinder block with respect to the intermediate plate, the adjustment plate having an adjustment stopper portion facing the stopper portion and an adjustment plate portion facing the intermediate plate portion, wherein an adjustment step is formed, as a step facing the intermediate step, at the boundary between the adjustment stopper portion and the adjustment plate portion, wherein the height of the intermediate step from the intermediate plate portion to the adjustment plate is set to be smaller than the height of the adjustment step from the adjustment plate portion to the intermediate plate; and a bead plate that is provided between the adjustment plate and the cylinder head or between the adjustment plate and the cylinder block, the bead plate having a bead that surrounds the combustion chamber opening at the outer side of the stopper portion with respect to the combustion chamber opening, wherein the intermediate plate, the adjustment plate, and the bead plate are laminated on each other and the thickness of a portion of the cylinder head gasket that has the stopper portion is set to be greater than the thickness of other portions of the cylinder head gasket, wherein the cylinder head gasket is formed such that, before the cylinder head gasket is provided between the contact surfaces, a space is formed between the stopper portion and the adjustment stopper portion, and that the intermediate plate portion at least partially contacts the adjustment plate portion, and the bead contacts the adjustment plate portion, and wherein the intermediate plate portion has an intermediate bead that is a bead surrounding the combustion chamber opening at the outer side of the stopper portion, and a portion of the intermediate plate portion other than the intermediate bead contacts the adjustment plate portion.