Patent ID: 6698711
Filing Date: 2004-03-02
Classification: F02M

Abstract:
A valve for controlling fluids, comprising an actuator unit (4) for actuating a valve member (3), which is axially displaceable in a valve body and with which a valve closing member (12) is associated, which valve closing member cooperates with at least one valve seat (14, 15) for opening and closing the valve (1) and separates a low-pressure region (16) at system pressure from a high-pressure region (17), the valve member (3) having at least one first piston (9) and one second piston (11) between which a hydraulic chamber (13) functioning as a hydraulic booster is embodied, and a filling device (24) connectable to the high-pressure region (17) to compensate for leakage losses, the filling device (24) being embodied with at least one channel-like hollow chamber (25), in which at least one throttle body (26) is disposed in such a way that on one end of the throttle body (26), a line (33) leading to the high-pressure region (17) discharges into the hollow chamber, and that on the opposite end of the throttle body (26), a system pressure line (28) leading to the hydraulic chamber (13) branches off, wherein system pressure (p_sys), is controlled by the geometry of a throttle bore (27) in the throttle body (26) and by the dimensions of the first piston (9), wherein the system pressure (p_sys) is reduced toward the low-pressure region (16), and is built up by pressure (p_R) prevailing in the high-pressure region (17).