| 主权项 |
1. An internal combustion engine comprising:
at least one cylinder head; and at least one cylinder which has at least one inlet opening fluidly connected to an intake system configured to generate charge air, and a valve assembly comprising a lifting valve for each inlet opening and comprising a valve actuating device for actuating the at least one lifting valve, which valve actuating device comprises at least one overhead camshaft with at least one cam;
where each lifting valve has a valve stem, on whose end facing toward the cylinder there is arranged a valve head corresponding to the inlet opening and whose other end faces toward the valve actuating device and which is mounted so as to be displaceable in translational fashion in a bushing-like valve stem guide such that the valve, when actuated and during rotation of the camshaft, performs an oscillating lifting movement in the direction of its longitudinal axis between a valve closed position and a valve open position so as to open up and close off the inlet opening; andwhere in the valve stem of at least one valve, there is provided an air supply duct which extends in a main section along the longitudinal axis of the valve, wherein, at a cylinder-side end of the air supply duct, at least one rectilinear section of the air supply duct branches off and emerges from the valve, and the air supply duct is, toward an end facing away from the cylinder, fluidly connected to the intake system via a line. |
