Invention Grant
- Patent Title: Hydraulic control system having swing energy recovery
- Patent Title (中): 具有摆动能量回收的液压控制系统
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Application No.: US13718907Application Date: 2012-12-18
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Publication No.: US09328744B2Publication Date: 2016-05-03
- Inventor: Rustu Cesur , Lawrence J. Tognetti , Pengfei Ma , Jiao Zhang , Tonglin Shang
- Applicant: Caterpillar Inc.
- Applicant Address: US IL Peoria
- Assignee: Caterpillar Inc.
- Current Assignee: Caterpillar Inc.
- Current Assignee Address: US IL Peoria
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner, LLP
- Agent Edward Lin
- Main IPC: F15B1/00
- IPC: F15B1/00 ; F15B1/033 ; F15B13/04 ; F15B21/14 ; F15B1/02 ; F15B21/08

Abstract:
A hydraulic control system for a machine is disclosed. The hydraulic control system may have a tank, a pump, and a fluid actuator. The hydraulic control system may further have an accumulator configured to selectively receive pressurized fluid discharged from the fluid actuator and selectively supply pressurized fluid to the fluid actuator. The hydraulic control system may also have a pressure sensor configured to generate a signal indicative of a pressure of the accumulator, a charge valve, a discharge valve, and a controller in communication with the control valve, the charge valve, and the discharge valve. The controller may be configured to detect stall of the fluid actuator, to make a comparison of the pressure of the accumulator with a threshold pressure, and to selectively move the charge valve to charge the accumulator or move the discharge valve to discharge the accumulator during the stall based on the comparison.
Public/Granted literature
- US20140060031A1 HYDRAULIC CONTROL SYSTEM HAVING SWING ENERGY RECOVERY Public/Granted day:2014-03-06
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