Volvo Construction Equipment Ab

Valentin Pause

The disclosed subject matter relates to an operator assist system for a working machine having a boom and an arm and with a freely suspended tool comprising at least one sensor arrangeable at the freely suspended tool or at the arm, which is able to measure angle, velocity and/or acceleration, fast reacting drives for boom and arm and as swing drive, and a control unit, which is able to calculate a needed counter or amplifier movement based on information on angle, velocity and/or acceleration received from the at least one sensor and control the fast reacting drives to carry out the counter or amplifier movement accordingly or to initiate a deceleration or acceleration of the working machine according to the calculated needed counter movement, if the working machine is moving along.

Operator assist system, working machine and method for annihilation or amplifying oscillation

The invention relates to a hydraulic system for a work machine. The system comprising: a main hydraulic machine connected to an output shaft of an engine of the work machine for providing power to working hydraulics of the work machine; a main pressure line connecting the main hydraulic machine to the working hydraulics; a support hydraulic machine connected to the output shaft; a hydraulic accumulator; a discharge valve connected between the accumulator and an input side of the support hydraulic machine; a charge valve connected between an output side of the support hydraulic machine and the hydraulic accumulator to selectively allow a flow from the support hydraulic machine to the hydraulic accumulator; a flow support valve connected between the output side of the support hydraulic machine and the main pressure line to selectively allow a flow from the support hydraulic machine to the main pressure line; and a hydraulic tank connected to the input side of the support hydraulic machine.

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Konz, Germany

Valentin Pause