Cylinder head for compression-ignition internal combustion engine

Claim 1

A cylinder head for a compression-ignition internal combustion engine of the type having precombustion chambers associated with the engine cylinders, the head being constituted by an elongate block formed to define walls delimiting both a cooling chamber and a plurality of cavities the latter of which provide for each of said engine cylinders, a precombustion chamber, induction and discharge ducts, and a seat for a fuel injector, said cooling chamber being traversable by coolant liquid to cool said walls which delimit the said cavities, and one said wall delimiting said cooling chamber constituting a base wall the outer surface of which faces into the cylinders of the engine when the cylinder head is assembled onto the engine cylinder block, the said base wall being integral with said head and formed, intermediate portions of the head corresponding to said engine cylinders, with means to allow expansion comprising slits having a uniform thickness extending into said cylinder head from the said outer surface of the said base wall in a plane perpendicular to the longitudinal direction of the cylinder head across the whole width thereof adjacently spaced from said cooling chamber whereby the portions of the cylinder head corresponding to different cylinders are partially separated from one another.