the cylinder 23 a circular segment shaped cutout 15 3 and finally an annular gap 15 4 between the left hand in fig4 connecting rod screw 1 3 and the bore 26 of the connecting rod bearing cap 1 2 or the connecting rod main body 1 1 in a similar way the second duct 12 which connects the lower supporting space 1 1 4 to the directional valve 10 hydraulically consists of a bore section 12 1 and an annular gap 12 2 between the right hand in fig4 connecting rod screw 1 3 and the connecting rod bearing cap 1 2 and the connecting rod main body 1 1 1 the way in which the ducts 15 and 12 are routed is determined predominantly by manufacturing aspects the routing of the ducts 15 and 12 within the connecting rod main body 1 1 is of minor significance for the function of the invention in the exemplary embodiment which is shown both ducts 12 and 15 open into the valve 10 at the bottom on the underside of the connecting rod bearing cap 1 2 as has already been explained the lubricating oil is present at an inlet of the directional valve 10 at the pressure which is provided by the oil supply of the internal combustion engine the directional valve 10 can be switched.