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Control device and control method for construction machine

  • US 10,570,585 B2
  • Filed: 06/08/2016
  • Issued: 02/25/2020
  • Est. Priority Date: 06/10/2015
  • Status: Active Grant
First Claim
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1. A control device for a construction machine, the control device comprising:

  • an electronic joystick configured to generate a request signal for operation of a working device;

    a main controller configured to receive the request signal and generate a torque command and a pilot signal;

    an engine control unit configured to receive the torque command and generate an engine revolutions-per-minute (RPM) command;

    an engine configured to be operated in compliance with the engine RPM command;

    a hydraulic motor/pump configured to be operated by the engine and discharge a working fluid or to be driven by an entering working fluid and output power;

    an auxiliary power device additionally installed on the engine or hydraulic motor/pump, and configured to provide auxiliary power to the engine or hydraulic motor/pump; and

    an engine load device including an air conditioner compressor configured to be powered by the engine;

    wherein when the auxiliary rower is provided from the auxiliary power device, the main controller or engine control unit controls the engine RPM of the engine to be lowered to a first engine RPM adapted for the maintenance of the engine in an ON state.

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