Mattingly & Malur, PC
Work machine
A work machine is adapted for reduced fuel consumption in regions where swinging by a hydraulic motor is prone to deterioration in efficiency, such as when the operating stroke of the swinging is small. The work machine includes an engine, a hydraulic pump, a swing structure, an electric motor for driving the swing structure, and a hydraulic motor for driving the swing structure, the hydraulic motor being driven by the hydraulic pump, and includes a swing control lever device that commands the swing structure to be driven. A control device operates in either an electric swing mode in which the swing structure is driven mainly by torque of the electric motor or a hydraulic swing mode in which the swing structure is driven mainly by torque of the hydraulic motor, depending on an operating stroke of the control lever device and/or a swing speed of the swing structure.
HITACHI CONSTRUCTION MACHINERY CO., LTD.
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E02F F15B E02F F15B F15B F15B F15B F15B
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Hidetoshi Tomoaki Kouji Shiho Shinya Shinji
Satake Kaneta Ishikawa Izumi Imura Nishikawa