Abstract: A hydraulic control system in a working machine includes hydraulic cylinders that make a working part ascend and descend; a first main pump that suctions oil from an oil tank and discharges the oil; an accumulator that accumulates oil discharged from weight holding side oil chambers of the hydraulic cylinders when the working part descends; and a hybrid pump that suctions accumulated oil pressure in the accumulator and discharges the oil pressure. When the working part ascends, discharged oil from the hybrid pump is supplied to the weight holding side oil chambers of the hydraulic cylinders. When an insufficient supply flow from the hybrid pump to the hydraulic cylinders exists, a complementary flow corresponding to the insufficient supply flow is supplied from the first main pump to the weight holding side oil chambers of the hydraulic cylinders.

Abstract: The present invention is a control system for controlling movement of a work implement from a dig location to a dump location. The work implement has at least four degrees of freedom defined by a swing joint angle &thgr;swing, a boom joint angle &thgr;boom, a stick joint angle &thgr;stick, and a bucket joint angle &thgr;bucket. In one embodiment, the control system comprises a central processing unit and a memory device. The control system further comprises an initialization module stored on the memory device and adapted to determine specified initial and final joint angles for an initial cycle of the work implement indicative of the specified dig and dump locations, respectively. The control system further comprises a hydraulic valve connected to the central processing unit and to the work implement. The control system further comprises a fuzzy control module stored on the memory device.