Cylinder head gasket

#The invention relates to a cylinder head gasket formed of a single metal base plate, which is installed between two members, such as a cylinder head and a cylinder block, of an internal combustion engine to seal therebetween.

#When a joint surface between the cylinder head and the cylinder block (cylinder body) of the engine of the automobile is sealed, the cylinder head gasket is installed therebetween to seal combustion gas, cooling water and the like.

#In view of demand for a light weight and low cost of the engine, a structure of the cylinder head gasket has been shifted to a simple type formed of a single metal base plate from a laminated type having a number of metal plates. Due to a single plate structure, only limited types of materials can be used.

#FIG. 1 is a partial perspective view showing a cylinder head gasket;

#FIG. 2 is a partial section view of the cylinder head gasket;

#FIGS. 3(a)-3(f) are partial perspective views showing primary sealing portions of the cylinder head gasket, wherein FIGS. 3(a) and 3(b) show structures of grommets, FIGS. 3(c) and 3(d) show structures of a shim provided on one side, and FIGS. 3(e) and 3(f) show structures of shims provided on both sides;

#Hereunder, embodiments of a cylinder head gasket according to the present invention will be explained with reference to the accompanied drawings.

#As shown in FIG. 5, a cylinder head gasket 1 of an embodiment according to the present invention is installed between a cylinder head and a cylinder block, i.e. a cylinder body, of an engine. The cylinder head gasket 1 seals combustion gas with a high temperature and pressure in a cylinder bore, and a fluid, such as cooling water and cooling oil, passing through a cooling water path and a cooling oil path.

#Incidentally, FIGS. 1-4(f) is explanatory schematic views. A plate thickness, a dimension of a sealing groove and a length to width ratio of the cylinder head gasket are different from the actual ones for a demonstration purpose.