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Control Device For Hybrid Construction Machine

  • US 20110035102A1
  • Filed: 04/20/2009
  • Published: 02/10/2011
  • Est. Priority Date: 04/25/2008
  • Status: Active Grant
First Claim
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1. A control device for a hybrid construction machine, includinga variable displacement type of a main pump,a circuit system connected to the main pump and including a plurality of operated valves for controlling actuators, andan operated valve for controlling a rotating motor provided in the circuit system, comprising:

  • a single operation detection unit that detects single operation of the rotating motor;

    a variable displacement type of a sub-pump;

    a tilt angle control unit that controls a tilt angle of the sub-pump;

    an electric motor that is a driving source of the sub-pump;

    a merging passage connected to the sub-pump and communicating with a discharge side of the main pump;

    an assist control input unit that inputs a signal representing whether or not assist control is required in the single operation of the rotating motor; and

    a controller that controls the tilt angle of the sub-pump and a rotational speed of the electric motor, whereinthe controller comprising a function of controlling one of or both a rotational speed of the electric motor and a tilt angle of the sub-pump on the basis of a low output set value which is relatively lower than a low output set value in regular working operations except the single operation of the rotating motor, when the controller receives the signal representing a rotating-motor single operation from the single operation detection unit and receives the signal representing a need for an assist from the assist control input unit.

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