Patent ID: 6374785
Filing Date: 2002-04-23
Classification: F01L

Abstract:
A vane-cell positioning device to adjust a rotary angle position of a camshaft with respect to a crankshaft of an internal combustion engine, comprising:an external rotor (1) driven off of the crankshaft and an internal rotor (2) coaxial to the external rotor that is connected to and turns with the camshaft and has a common rotation axis (11) with the external rotor (1); inside the external rotor (1) is at least one hydraulic working space (31) that is divided into a first and second pressure chamber (32, 33) by a pivoting vane (15) of the internal rotor (2); the pressure chambers (32, 33) are in fluid communication with two annular spaces (25, 26) in the internal rotor and are supplied with pressurized oil by the pressure chambers in alternating fashion or at the same time; the internal rotor (2) has at least one vane mounting notch (16) for the pivoting vane (15); between a notch base (19) of the vane mounting notch (16) and a bottom (18) of the pivoting vane (15) is a gap (20) for a vane pressure spring (23), the bottom (18) of the pivoting vane (15) is loaded with pressurized oil when the internal combustion engine is running and the bottom (18) of the pivoting vane (15) is in fluid communication with at least one of the pressure chambers (32, 33) and the annular spaces (25, 26) located in the internal rotor (2); the pivoting vane (15) includes two working surfaces (38) which have radial and centered feed notches (39).