Patent ID: 7389848

Claim:
A hydraulic power assisting steering apparatus comprising a valve that is arranged to be actuated depending on an applied torque for altering pressure of an hydraulic fluid to be received by a hydraulic power steering system for applying a steering assist force, wherein the valve is arranged to be dynamically further actuated depending on at least one external or internal vehicle input parameter; wherein the valve is arranged to be dynamically further actuated by displacement of a first valve member relative to a second valve member; wherein said first valve member is arranged to be axially displaced with respect to a shaft in the hydraulic power steering system; wherein said first valve member is arranged to be electromechanically displaced by means of an electric motor; and wherein the electric motor is arranged to actuate a cam that is arranged to move the first valve member, the cam being arranged to rotatably engage with a guide portion arranged on the first valve member to cause axial displacement of the first valve member upon rotation of the cam.