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Engine control apparatus and construction machine

  • US 9,567,916 B2
  • Filed: 12/20/2012
  • Issued: 02/14/2017
  • Est. Priority Date: 11/20/2012
  • Status: Expired due to Fees
First Claim
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1. An engine control apparatus for controlling an engine which drives a hydraulic pump to discharge operation oil, the engine control apparatus comprising:

  • a pump driving power limit unit configured to limit pump driving power, which is power used to drive the hydraulic pump, based on pressure of the operation oil discharged by the hydraulic pump when in a state in which a part of the operation oil discharged by the hydraulic pump is released because pressure of the operation oil discharged by the hydraulic pump has become equal to or higher than preset relief pressure; and

    an engine output control unit configured to control output of the engine so that target speed, which is speed of the engine set as a target, becomes equal to or higher than a value at a point of time when limiting of the pump driving power is started.

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