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METHOD AND APPARATUS TO DETERMINE INSTANTANEOUS ENGINE POWER LOSS FOR A POWERTRAIN SYSTEM

  • US 20080262698A1
  • Filed: 04/19/2007
  • Published: 10/23/2008
  • Est. Priority Date: 04/19/2007
  • Status: Active Grant
First Claim
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1. Article of manufacture, comprising a storage medium having a machine-executable program encoded therein to control operation of an internal combustion engine, the program comprising:

  • code to monitor engine operating conditions;

    code to determine a nominal power loss based upon an engine operating point;

    code to determine a power loss correction to the nominal power loss based upon the engine operating conditions and the engine operating point, the power loss correction determinable for combinations of an engine air/fuel ratio mode, an engine cylinder activation state, and, an engine operating temperature mode; and

    ,code to estimate a power loss for the internal combustion engine based upon the nominal power loss and the power loss correction.

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