New assistance system

Abstract

A closed-circuit hydraulic system supplying at least one hydraulic machine comprising a first and a second orifice, including a closed-circuit high-pressure pump comprising a first and a second orifice, a high-pressure valve block hydraulically connected to the high-pressure pump, through which a first hydraulic line and a second hydraulic line pass, respectively connecting the first and second orifices of the pump and the hydraulic machine, one or the other of the first or second hydraulic lines being able to be alternately subjected to high hydraulic pressure, and containing a bypass spool ZP1ZP2 between the supply line and the return line suitable for connecting the first and second hydraulic lines, and a low-pressure valve block containing valves and check valves, characterized in that the high-pressure valve block and the low-pressure valve block are separated and connected to each other by hydraulic lines.and in that only the high-pressure valve block can receive high hydraulic pressure, the low-pressure block receiving only low hydraulic pressure. FIG.1,