公开(公告)号：US20240352951A1

公开(公告)日：2024-10-24

申请号：US18682369

申请日：2022-08-05

Applicant: HD HYUNDAI INFRACORE CO., LTD.

Inventor： Myeongku YEO

IPC: F15B13/06 ,  F15B13/02

CPC classification number: F15B13/06 ,  F15B13/025 ,  F15B2211/45

Abstract: A hydraulic system according to an embodiment of the present invention comprises: a main hydraulic pump for discharging a hydraulic fluid; a plurality of driving apparatuses operating by receiving the hydraulic fluid; a parallel flow path through which the hydraulic fluid discharged by the main hydraulic pump flows; a plurality of control spools respectively connected to the parallel flow path in parallel to control the supply of hydraulic fluid to the plurality of driving apparatuses; and a plurality of electronic proportional decompression valves for adjusting a pilot pressure, applied to the respective control spools to be proportional to a current signal which has been input, wherein, if the plurality of control spools do not operate, the hydraulic fluid discharged by the main hydraulic pump is drained into an oil tank via the parallel flow path without passing through the plurality of control spools.