Patent ID: 7069951

Claim:
A proportional solenoid valve for a camshaft adjusting device of motor vehicles, the proportional solenoid valve comprising: a valve housing; a piston movably arranged in the valve housing and provided with at least one pressure medium passage; a solenoid part connected to the valve housing and acting on the piston; the valve housing having at least one working connector, a tank connector, and a pressure connector configured to supply a pressure medium into the piston; one or more leakage passages connecting the pressure connector at all times to the at least one working connector; wherein the piston is a hollow piston having a wall and wherein the at least one pressure medium passage is at least one opening penetrating the wall; wherein several of the openings penetrating the wall are provided and wherein a first and a second one of the working connectors are provided, wherein the first and second working connectors each have at least one of the openings penetrating the wall correlated therewith.