Camshaft adjusting system with means for catching hydraulic fluid draining from a valve in order to directly recirculate the fluid into the camshaft adjuster

Abstract

The invention relates to a camshaft adjusting system () for an internal combustion engine of a motor vehicle, including a hydraulic camshaft adjuster () which has a stator (), a rotor () that is rotatably mounted in the stator (), and a hydraulic control system () that has a valve (). The rotor () has at least one vane which protrudes into a pressure chamber formed between the rotor () and the stator () such that the pressure chamber is divided into two sub-chambers, each of which interacts with the hydraulic control system () such that a hydraulic pressure ratio is established between the two sub-chambers, said ratio specifying a relative rotational position between the rotor () and the stator (), and is adjusted on the basis of the position of the valve (). The camshaft adjusting system also includes an actuator () which is arranged adjacently in the axial direction of the camshaft adjuster () and which acts on the valve () for adjusting purposes. A hydraulic fluid section () is arranged on an actuator () face facing the camshaft adjuster (), with this hydraulic fluid section () being designed to deflect a flow of hydraulic fluid exiting the valve () into the surroundings of the camshaft adjuster () back into the camshaft adjuster () in an operational state.