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Method for determining the condition of engine oil based on soot modeling

  • US 5,914,890 A
  • Filed: 10/30/1997
  • Issued: 06/22/1999
  • Est. Priority Date: 10/30/1997
  • Status: Expired due to Fees
First Claim
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1. A method for determining the condition of lubricating oil in an internal combustion engine, including the steps of:

  • determining a plurality of parameters associated with the engine;

    determining a model of the duration of injection of fuel into a cylinder in the engine;

    determining a wall area of the cylinder that is coated with soot during injection;

    determining a model of the soot in the oil as a function of the parameters, the fuel injection duration model, and the coated wall area; and

    responsively determining the condition of the oil.

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