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Viscosity detection using sump

  • US 9,523,320 B2
  • Filed: 10/15/2013
  • Issued: 12/20/2016
  • Est. Priority Date: 10/15/2013
  • Status: Expired due to Fees
First Claim
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1. A method for controlling an engine, comprising:

  • after engine shutdown, learning engine oil viscosity based on time to drain oil back into an engine sump and oil temperature during said draining; and

    correcting an engine operating parameter based on said learned oil viscosity, said engine operating parameter comprising a throttle plate controlled by an engine controller for controlling air inducted into the engine.

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