Patent ID: 8505582

Claim:
A hydraulic valve for an oscillating-motor camshaft adjuster, comprising: a bush, a hollow piston with a piston bottom on which an actuator is applied, the piston being axially movable within the bush by means of the actuator against a force of a screw-type pressure spring, a sleeve within the hollow piston which is secured in the bush and disposed for movement relative to the piston, and a wall of the sleeve having at least one though-opening, which leads to at least one opening of the hollow piston, the at least one opening of the hollow piston leading a supply pressure applied inside the sleeve alternatively to two sets of pressure chambers of the oscillating-motor camshaft adjuster, wherein: the sleeve has a sleeve bottom closing an inside space of the hollow piston, the bush has two working ports for adjusting the two sets of pressure chambers, the two working ports are axially distanced relative to one another, and an additional port is provided between the two working ports for utilizing camshaft alternating torques.