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CONTROL DEVICE OF ENGINE, CONTROL DEVICE OF ENGINE AND HYDRAULIC PUMP, AND CONTROL DEVICE OF ENGINE, HYDRAULIC PUMP, AND GENERATOR MOTOR

  • US 20090320461A1
  • Filed: 10/27/2006
  • Published: 12/31/2009
  • Est. Priority Date: 10/28/2005
  • Status: Active Grant
First Claim
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1. :

  • A control device of an engine comprising;

    a hydraulic pump driven by the engine;

    hydraulic actuators supplied with pressurized fluid discharged from the hydraulic pump;

    an operation unit for operating each hydraulic actuator;

    a detection unit for detecting an operation amount of the operation unit;

    a target flow rate calculating unit for calculating a target flow rate of the hydraulic pump based on the operation amount of the operation unit;

    a first target revolution calculating unit for calculating a first target revolution of the engine according to the target flow rate;

    an operation state determining unit for determining a switch of the operation unit from a non-operation state to an operation state;

    a second target revolution setting unit for setting the target revolution of the engine to a second target revolution which is higher than a low idle revolution when determined that switch is made to the operation state by the operation state determining unit; and

    a revolution control unit for controlling the engine revolution to match the higher target revolution of the first target revolution and the second target revolution.

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