Patent ID: 7219637

Claim:
An engine comprising a cylinder head, at least one combustion chamber formed in part by the cylinder head, at least one cam chamber formed at least in part by the cylinder head, the cylinder head including at least one port communicating with the combustion chamber, a valve selectively closing the port, a camshaft disposed within the cam chamber to actuate the valve, and a variable valve timing device coupled to the camshaft and including a hydraulic pressure switchover valve, the hydraulic pressure switchover valve having an elongated valve body and being disposed outside the cam chamber and oriented such that a longitudinal axis of the elongated valve body lies generally parallel to a rotational axis of the camshaft, wherein the cylinder head includes a side wall and the hydraulic pressure switchover valve is disposed to an outer side of the side wall and arranged to lie generally parallel to the side wall and the engine additionally comprising a camshaft drive member mounted on the camshaft, and the hydraulic pressure switchover valve being arranged so that the elongated valve body extends from one side of the camshaft drive member to the other side thereof in a direction along the camshaft.