Abstract: A cylinder head (10) for an internal combustion engine, having at least two inlet valves (20) associated with the or each combustion chamber, the inlet valves (20) being supported in the cylinder head (10) with their axes spaced from one another in a first direction, at least two exhaust valves (22) with their axes of reciprocation also spaced from one another in the first direction and at least two receiving formations for operating elements (such as a spark plug (38) and fuel injector (40)), the receiving formations opening into the combustion chamber portion in a central region bounded by the heads of the valves, wherein the receiving formations are inclined to one another so as to diverge generally in the first direction as they extend away from the combustion chamber portion.

Abstract: A cylinder head (10) for an internal combustion engine, having at least two inlet valves (20) associated with the or each combustion chamber, the inlet valves (20) being supported in the cylinder head (10) with their axes spaced from one another in a first direction, at least two exhaust valves (22) with their axes of reciprocation also spaced from one another in the first direction and at least two receiving formations for operating elements (such as a spark plug (38) and fuel injector (40)), the receiving formations opening into the combustion chamber portion in a central region bounded by the heads of the valves, wherein the receiving formations are inclined to one another so as to diverge generally in the first direction as they extend away from the combustion chamber portion.

Abstract: A cylinder head arrangement for an internal combustion engine, having a combustion chamber portion for defining a combustion chamber above a cylinder in which a piston is reciprocable; two inlet valves lying substantially to one side of the combustion chamber portion, and two exhaust valves lying substantially to the other side of the combustion chamber portion; and a fuel injector disposed in an edge region of the combustion chamber portion at the exhaust valve side thereof, and arranged to inject fuel generally across the combustion chamber portion towards the inlet valve side thereof.