发明名称 HYDRAULIC CONTROL SYSTEM HAVING OVER-PRESSURE PROTECTION
摘要 A hydraulic control system for a machine is disclosed. The hydraulic control system may have a tank, a pump configured to draw fluid from the tank and pressurize the fluid, an actuator, and a control valve configured to direct fluid from the pump to the actuator and from the actuator to the tank to move the actuator. The hydraulic system may also have a main relief valve movable away from a closed position to pass pressurized fluid to the tank when a pressure of the fluid directed to the actuator exceeds a first threshold pressure, and a controller in communication with the pump. The controller may be configured to selectively reduce a displacement of the pump after the main relief valve has moved away from the closed position when the pressure of the fluid directed to the actuator exceeds a second threshold pressure.
申请公布号 US2014060020(A1) 申请公布日期 2014.03.06
申请号 US201213714017 申请日期 2012.12.13
申请人 CATERPILLAR INC. 发明人 PETERSON RANDAL N.;EGELJA ALEKSANDAR M.;CESUR RUSTU
分类号 E02F9/22 主分类号 E02F9/22
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