Patent ID: 7946266

Claim:
A hydraulic circuit of a motor vehicle, comprising: a hydraulic piston which has at least two oppositely oriented hydraulic chambers and is acted upon by an external force in one of an alternating manner or in a rising manner, the hydraulic piston performing a positional variation as a result of differing pressure loading on the oppositely oriented hydraulic chambers, a hydraulic shunt for controlling the differing pressure loading and drawing a hydraulic medium from a hydraulic pressure source, and at least one non-return valve, wherein: the hydraulic circuit belongs to an internal-combustion engine; the hydraulic piston comprises a swivel-motor-type camshaft adjuster into which an alternating force of at least one camshaft is fed; in addition to the pressure loading via a hydraulic adjustment of the shunt, a pressure loading on the hydraulic medium by the hydraulic piston from a negative constituent of the alternating force is utilized, by opening at the at least one non-return valve, to vary the position of the hydraulic piston; the negative constituent of the alternating force is fed in, via the at least one non-return valve operating as a bypass; the hydraulic medium comprises engine oil; the at least one non-return valve establishes, in a blocking direction, a connection from a hydraulically pressure-loaded input side of the hydraulic shunt to at least one corresponding output side of the hydraulic shunt, the at least one corresponding output side being in communication with at least one corresponding hydraulic chamber.