HYDRAULIC SYSTEM, CONTROL METHOD AND MACHINE COMPRISING SAID HYDRAULIC SYSTEM Russian patent published in 2019 - IPC F15B11/17 

FIELD: machine building.

SUBSTANCE: invention relates to a hydraulic system comprising: a hydraulic steering system; working tool hydraulic system; variable-capacity hydraulic pump for supply of working fluid to hydraulic steering system and constant-pressure hydraulic pump to supply working fluid to working tool hydraulic system; hydraulic system, further comprising a selective valve, which includes: a first inlet having a fluid connection to the hydraulic steering system for receiving power feedback from it; second inlet opening, capable of entering into fluid connection with working tool hydraulic system to receive power feedback from it; outlet port for maximum pressure supply from the first inlet hole and the second inlet hole to the variable-capacity hydraulic pump for variable-performance hydraulic pump operation control, where the hydraulic system comprises a logic valve assembly having a fluid connection to the working tool hydraulic system and the selective valve, made so that second inlet of selective valve is disconnected from working tool hydraulic system, when feedback pressure from working tool hydraulic system exceeds preset value. Invention further relates to a method of controlling a hydraulic system and a machine comprising said hydraulic system.

EFFECT: disclosed are a hydraulic system, a control method and a machine comprising said hydraulic system.

10 cl, 3 dwg