RESEARCHES ON THE ROTARY VALVES OF THE HYDRAULIC STEERING SYSTEMS

摘要

The paper presents the researches carried out by the authors on the steady-state behaviour of the open centre, flow control valves, included in the hydraulic steering systems of the modern cars. A test bench was designed, in order to validate the theoretical models of the valves, and to find out the pressure sensitivity. The paper contains the test procedure and the experimental results obtained by testing a Volvo ZF Servotronic hydraulic steering.