Invention Grant
- Patent Title: Hydraulic control system
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Application No.: US15544078Application Date: 2015-01-27
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Publication No.: US10337172B2Publication Date: 2019-07-02
- Inventor: Sang Hee Lee , Eun Byeol Lee
- Applicant: VOLVO CONSTRUCTION EQUIPMENT AB
- Applicant Address: SE Eskilstuna
- Assignee: Volvo Construction Equipment AB
- Current Assignee: Volvo Construction Equipment AB
- Current Assignee Address: SE Eskilstuna
- Agency: WRB-IP LLP
- International Application: PCT/KR2015/000822 WO 20150127
- International Announcement: WO2016/122010 WO 20160804
- Main IPC: E02F9/22
- IPC: E02F9/22 ; E02F9/20 ; F15B11/02 ; F15B11/042

Abstract:
A hydraulic control system includes a flow rate control valve; a variable displacement hydraulic pump which is connected to the flow rate control valve and discharges hydraulic pressure to the flow rate control valve; a pump discharge pressure detector which is installed in a section where the flow rate control valve and the variable displacement hydraulic pump are connected, and detects the discharge pressure of the hydraulic pressure discharged from the variable displacement hydraulic pump to the flow rate control valve; and a hydraulic controller including a detection unit which is connected to the pump discharge pressure detector, detects the discharge pressure of the variable displacement hydraulic pump and converts the discharge pressure to a pump discharge pressure value, a comparison unit which receives the pump discharge pressure value from the detection unit, compares the pump discharge pressure value with a pre-stored lowest recognition pressure value, and determines whether the pump discharge pressure value is greater or less than the lowest recognition pressure value, and a calculation unit which, by interworking with the comparison unit, if the pump discharge pressure value is less than the lowest recognition pressure value, calculates a control pressure by recognizing the control.
Public/Granted literature
- US20180002898A1 HYDRAULIC CONTROL SYSTEM Public/Granted day:2018-01-04
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