Schaeffler Technologies Ag & Co .Kg

Matthias Friedrichs

Dirk Heintzen

a cam adjuster for adjusting the angle-of-rotation positions of a cam shaft relative to a crankshaft. The cam shaft adjuster has at least two operating chambers to which pressure oil can be supplied to change the angle-of-rotation position. At least one of the operating chambers can be deactivated depending on an operating parameter by blocking the pressure oil supply.

Cam shaft adjuster and method for adjusting the angle-of-rotation position of a cam shaft relative to a crankshaft

A camshaft adjusting device of an internal combustion engine having two camshafts supported concentrically to one another, the axial position of the outer camshaft being determined by an axial bearing and the outer camshaft interacting with a sealing cover of an adjusting apparatus. A first cam is rotationally fixed to the outer camshaft. A second cam is rotationally fixed to the inner camshaft, which can be rotated relative to the outer camshaft by the adjusting apparatus, wherein the inner camshaft has a locking contour on at least one section of the outside of the inner camshaft, which locking contour engages in a form-closed manner in a mating contour on at least one section of the inside of the outer camshaft in order to fix the axial position of the inner camshaft relative to the outer camshaft.

Phase-adjusting device of a camshaft for an internal combustion engine

A camshaft adjusting system of an internal combustion engine, which has a rotor, a stator, and first and second concentrically arranged camshafts one of which is driven by the stator and the other one of which is driven by the rotor. The camshafts can be rotated relative to one another to change phase angles of at least one cam on the first of the camshafts relative to at least one cam on the second of the camshafts. Hydraulic vane cells between the stator and the rotor control the rotation of the rotor relative to the stator. The total difference in the shapes and positions of the camshafts is smaller than bearing gaps of at least one bearing point between the rotor and the stator, and sealing elements which can be adjusted to the bearing gaps are provided in the bearing gaps between the rotor and the stator.

Camshaft adjusting system

An apparatus () for the variable setting of control times of gas exchange valves () of an internal combustion engine (), having an inner rotor () and an outer rotor () which is arranged such that it can rotate relative to the former, and the inner rotor () has a constant phase relationship to a crankshaft () of the internal combustion engine (). The apparatus () has one or more coupling elements (), into which a drive shaft () of an additional assembly () can engage, and wherein torque can be transmitted from the apparatus () to the drive shaft () by the coupling element () or coupling elements (). It is provided here to connect the coupling element () or coupling elements () fixedly in terms of rotation to the inner rotor () or to configure it/them in one piece with the inner rotor.

Growing community of inventors

Nuremberg, Germany

Matthias Friedrichs