Excavating – Ditcher – Condition responsive
Patent
1994-03-23
1995-09-05
Taylor, Dennis L.
Excavating
Ditcher
Condition responsive
414699, 36442407, E02F 300, G06F 1520
Patent
active
054469805
ABSTRACT:
A control system automatically controls a work implement of an excavating machine through a machine work cycle. The work implement includes a boom, stick and bucket, each being controllably actuated by at least one respective hydraulic cylinder. A position sensor produces respective position signals in response to the respective position of the boom, stick and bucket. A microprocessor receives the position signals, compares at least one of the boom, stick and bucket position signals to a predetermined one of a plurality of position setpoints. A pressure sensor produces respective pressure signals in response to the associated hydraulic pressures associated with the boom, stick, and bucket hydraulic cylinders. The microprocessor receives the pressure signals, and compares at least one of the boom, stick and bucket pressures to a predetermined one of a plurality of pressure setpoints. An operator interface produces a material condition setting, the material condition setting being representative of a predetermined condition of the excavating soil. The logic device produces a command signal in response to the pressure and position comparisons, the command signal having a magnitude responsive to the material condition setting. An electrohydraulic system receives the command signal and controllably actuates predetermined ones of the hydraulic cylinders to perform the work cycle.
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Caterpillar Inc.
Masterson David M.
Pezzuto Robert
Taylor Dennis L.
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