发明名称 HYBRID EXCAVATOR BOOM ACTUATING SYSTEM AND METHOD FOR CONTROLLING SAME
摘要 The present invention relates to a hybrid excavator boom actuating system and to a method for controlling the same. The hybrid excavator boom actuating system comprises: an electric motor serving as a motor or a generator; an ultra capacitor for storing electrical energy generated by the electric motor; a hydraulic pump motor driven by said electric motor to supply working oil to a boom; a boom control valve which has a closed circuit for selectively connecting or disconnecting an outlet line and an inlet line of the hydraulic pump motor to or from a head or a rod side of the boom; a main pump driven by the engine to supply working oil to a bucket, a travel motor or an arm; a motor bypass valve connected to the outlet line and the inlet line to interconnect the outlet line and the inlet line or disconnect the outlet line from the inlet line; and a control unit for controlling the electric motor, the hydraulic pump motor, the boom control valve and the motor bypass valve. According to the present invention, the hydraulic pump motor and the system are prevented from unstably operating and an operating performance of the boom is ensured to recover regenerative energy of the boom during a boom descending operation.
申请公布号 WO2012087080(A3) 申请公布日期 2012.09.27
申请号 WO2011KR10083 申请日期 2011.12.26
申请人 DOOSAN INFRACORE CO., LTD.;KANG, BYUNG IL;HONG, KI HWAN 发明人 KANG, BYUNG IL;HONG, KI HWAN
分类号 E02F9/22;B60K6/38;F02D29/04 主分类号 E02F9/22
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