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Engine output calculation method and engine output calculation apparatus

  • US 20070100534A1
  • Filed: 11/01/2006
  • Published: 05/03/2007
  • Est. Priority Date: 11/01/2005
  • Status: Active Grant
First Claim
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1. An engine output calculation method, comprising:

  • making a torque estimation model that defines a relation between indicated torque and characteristic values that indicate a flow of gas and a combustion state in an internal combustion engine;

    determining a value of a parameter relating to a heat-generation rate dQ/dθ

    , which is a rate of change of a heating value Q in a cylinder with respect to a crank angle θ

    based on an operating condition;

    calculating the heat-generation rate dQ/dθ

    under a desired operating condition, using the value of the parameter; and

    estimating the indicated torque of the internal combustion engine based on the torque estimation model, using the heat-generation rate dQ/dθ

    .

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