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ENGINE ROTATIONAL SPEED CONTROL APPARATUS

  • US 20150291003A1
  • Filed: 03/17/2015
  • Published: 10/15/2015
  • Est. Priority Date: 04/11/2014
  • Status: Active Grant
First Claim
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1. A rotational speed control apparatus for an engine, the engine configured to drive a compressor that compresses a cooling medium for air conditioning, the rotational speed control apparatus comprising:

  • an electronic control unit that is configured to;

    (a) correct a torque of the engine through feedback in accordance with a deviation between a rotational speed of the engine during idle operation and a target rotational speed;

    (b) (i) calculate a load torque of the compressor, and (ii) correct the calculated value of the load torque in accordance with a deviation between the rotational speed of the engine and the target rotational speed and correct a required value of the torque of the engine in accordance with the corrected value of the calculated value of the load torque, as changeover transition period control, in a changeover transition period between a driven state of the compressor and a stopped state of the compressor; and

    (c) set an execution period of the changeover transition period control such that the execution period in a changeover transition period from the stopped state of the compressor to the driven state of the compressor is longer than an execution period of the changeover transition period control in a changeover transition period from the driven state of the compressor to the stopped state of the compressor.

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