Patent ID: 9598987
Date: 2017-03-21
CPC Classifications: F01L

Claim:
1. A camshaft adjusting device for an internal combustion engine comprising: a rotor that is lockable in rotation with a camshaft of the internal combustion engine, and a pot-shaped stator that is drivable by a crankshaft and encompasses the rotor, and an annular space present between the stator and the rotor and divided into several pressure chambers by stator ribs extending up to the rotor, wherein the pressure chambers are each divided by vanes provided on the rotor into two work chambers (A, B), and a central valve with a displaceable valve body by which a pressurized medium fed out from a pressurized medium reservoir (T) via a pressurized medium pump (P) is selectively fed into the work chambers (A, B) on one side of the vane as a function of a position of the displaceable valve body and is returned from the work chambers (A, B) into the pressurized medium reservoir (T) on the other side of the vane, and a pressure limiting valve in the camshaft adjusting device that enables a return of the pressurized medium back into the pressurized medium reservoir (T) or to the pressurized medium pump (P) when a predetermined pressure in the camshaft adjusting device is exceeded.