Arrangement for the automatically controlled varying of the relative rotating position of shafts in an internal-combustion engine

An arrangement for automatically controlled varying of a relative rotating position of two shafts in an internal-combustion engine, said shafts including a camshaft and a second shaft, the camshaft being rotatable relative to said second shaft as a function of parameters of said internal-combustion engine, the arrangement comprising:

• a driving wheel which drives the camshaft and carries a first set of gear teeth;
• a second set of gear teeth connected with the camshaft with at least one of the first and second sets of gear teeth being a set of helical gear teeth;
• an intermediate timing gear axially displaceable between at least two end positions and arranged between the driving wheel and the camshaft to act upon the second set of gear teeth;
• a stationary intermediate timing gear bearing ring which coaxially surrounds the intermediate timing gear at least in sections and bounds an annulus formed between the bearing ring and the intermediate timing gear;
• a fluid in the annulus, said fluid having a viscosity which can be changed by application of voltage;
• an electronic control device coupled to apply a first output voltage to the fluid, wherein application of the first output voltage to the fluid creates a braking moment that acts on the intermediate timing gear, the braking moment causing an axial force that displaces the intermediate timing gear towards one of the end positions.