LOWERING HYDRAULIC CONTROL METHOD, LOWERING HYDRAULIC CONTROL SYSTEM AND ENGINEERING EQUIPMENT Russian patent published in 2025 - IPC F15B11/42 F15B11/08 F15B13/44 

FIELD: mechanical engineering.

SUBSTANCE: method of lowering hydraulic control, lowering hydraulic control system and engineering equipment. Method of hydraulic control of lowering includes: obtaining a pressure value in boom extension changing cylinder blind side; when the pressure value is greater than or equal to the predetermined pressure value, establishing a first control mode for the input current of the electric proportional control valve, wherein the first control mode includes a plurality of first control sub-modes; and based on the boom lowering speed, which is selected by the user, selecting the control current of the corresponding first control sub-mode as the electric proportional control valve input current.

EFFECT: method for hydraulic control of lowering solves the problem of complexity of controlling the lowering speed of the boom; and by means of method of hydraulic lowering control various first control sub-modes can be selected according to user needs, and therefore the input current of the electric proportional control valve can be adjusted so that the boom lowering speed can be controlled automatically and, consequently, the boom is lowered at different speeds.

15 cl, 5 dwg