Energy recuperation system and method for construction equipment
AssigneeVolvo Construction Equipment AB
InventorDongsoo Kim
Life of this patent
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Abstract
An energy recuperation system for construction equipment includes an actuator driving upward and downward operations of a work unit; an accumulator connected to the actuator; and a controller determining a predicted downward mode associated with the downward operation of the work unit, regulating a dischargeable lowest limit pressure of the accumulator to a target pressure corresponding to the predicted downward mode, and charging the accumulator having the dischargeable lowest limit pressure regulated to the target pressure with pressurized oil discharged from the actuator during the downward operation of the work unit to recuperate energy, and an energy recuperation method.
Claims20
An energy recuperation system for construction equipment, comprising:
- an actuator configured to drive an upward operation and a downward operation of a work unit;
- an accumulator connected to the actuator;
- and
- a controller configured to determine a predicted downward mode associated with the downward operation of the work unit, to regulate a dischargeable lowest limit pressure of the accumulator to a target pressure corresponding to the predicted downward mode, and to charge the accumulator having the dischargeable lowest limit pressure regulated to the target pressure with pressurized oil discharged from the actuator during the downward operation of the work unit such that an energy recuperation is achieved.
An energy recuperation method for construction equipment, the method comprising:
- determining a predicted downward mode of a work unit;
- regulating a dischargeable lowest limit pressure of an accumulator to a target pressure on the basis of the predicted downward mode;
- and
- charging the accumulator having the dischargeable lowest limit pressure regulated to the target pressure with pressurized oil discharged from an actuator actuating the work unit during downward of the work unit to recuperate energy.
Dependencies are inferred from the claim text.