Cylinder head for an internal combustion engine

Claim 1

In a diesel engine of the type having a plurality of cylinders each comprising a central injector and two axially spaced apart inlet valves and two axially spaced apart outlet valves, the four valves being grouped around the injector, a cylinder head to fit two or more adjacent cylinders comprising: a. for each of the cylinders two inlet conduits, all of the inlet conduits being open to a first side face of the head, the first side face being provided with a common depression having a base, each of the inlet conduits extending from the base of the common depression, b. for each of the cylinders two outlet conduits, each being associated with an outlet valve, the conduits opening to a second side face of the head, the second side face being opposite to the first side face, a common partition between the each of the two outlet conduits, the partition terminating short of the second side face such that the two conduits merge into a single conduit proximate the second side face, and wherein c. the inlet conduit associated with the inlet valve most distant from the first side face includes a first rectilinear section substantially perpendicular to the first side face and a second curvilinear section which provides turbulence around the housing of the injector, the inlet conduit associated with the inlet valve closest to the first side face has a first rectilinear section inclined to the first side face followed by an S-shaped section such that the flow of gases about each inlet valve of the cylinder is substantially equal and the inlet conduit of the inlet valve closest to the first side face associated with a first cylinder being adjacent to the inlet conduit of the inlet valve most distant from the first side face of a second cylinder, the adjacent inlet conduits converging towards the base of the common depression.