Level regulator for automotive vehicles

A level regulator for automotive vehicles, comprising a hydraulically operating level adjusting device associated with at least one axle of the automotive vehicle, a fluid separator provided with a hydraulic cylinder wherein at least one inlet pressure chamber, through a hydraulic piston to which a restoring force acting against the pressure in the inlet pressure chamber is applied is separated from at least one outlet pressure chamber connectable to the level adjusting device, the inlet pressure chamber through at least one switch valve being connectable temporarily to a hydraulic pressure source of the vehicle, said level adjusting device being normally connected to a hydraulic fluid return reservoir, wherein the fluid separator comprises an input cylindrical housing in which is disposed a first piston portion adapted to close the first inlet pressure chamber, an ouput cylindrical housing attached to the input cylindrical housing and accommodating a second piston portion adapted to close the outlet pressure chamber, the first piston portion mounted to apply pressure to the second piston portion through a pushrod, wherein the input cylindrical housing includes a stepped bore including a pressure chamber section and a separating section, the separating section being of a substantially larger cross-section than the pressure chamber section and the pushrod being substantially located in the separating section, and wherein a first limit switch is mounted on the fluid separator for contact with said hydraulic piston to indicate an initial position of the hydraulic piston.

A level regulator for automotive vehicles, comprising a hydraulically operating level adjusting device associated with at least one axle of the automotive vehicle, a fluid separator provided with a hydraulic cylinder wherein at least one inlet pressure chamber, through a hydraulic piston to which a restoring force acting against the pressure in the inlet pressure chamber is applied is separated from at least one outlet pressure chamber connectable to the level adjusting device, the inlet pressure chamber through at least one switch valve being connectable temporarily to a hydraulic pressure source of the vehicle, said level adjusting device being normally connected to a hydraulic fluid return reservoir, wherein the fluid separator comprises an input cylindrical housing in which is disposed a first piston portion adapted to close the first inlet pressure chamber, an output cylindrical housing attached to the input cylindrical housing and accommodating a second piston portion adapted to close the outlet pressure chamber, the first piston portion mounted to apply pressure to the second piston portion through a pushrod, wherein the first piston portion of the fluid separator includes two sides to which pressure can be applied, said first piston portion being in a pressure chamber and separating the first inlet pressure chamber from a second inlet pressure chamber and the second piston portion includes a first and a second piston section adapted to close the first and a second outlet pressure chamber, respectively, wherein the two outlet pressure chambers are each in communication with a level adjusting circuit of the level adjusting device through separate check valves, and, further including a limit switch for detecting an end position of the piston located on the fluid separator.