Device to modify the angular phase of an internal combustion engine camshaft

摘要

Adjustment member (6) includes a hydraulic pump part (7) driven by the drive gear and a hydraulic drive part (8) connected to the camshaft (1a). The pump output has a flow connection to the drive part input and the flow rate and/or pressure of the working fluid delivered by the pump part can be controlled. Preferably pump and drive part are displacement machines.