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Methods and systems for monitoring engine oil temperature of an operating engine

  • US 8,850,876 B2
  • Filed: 07/19/2012
  • Issued: 10/07/2014
  • Est. Priority Date: 07/19/2012
  • Status: Active Grant
First Claim
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1. A system for monitoring engine oil temperature of an operating engine comprising:

  • a plurality of sensors for obtaining sensor signals from the operating engine for a predetermined set of engine conditions, at least one of the plurality of sensors comprising an oil temperature sensor for measuring an engine oil temperature;

    an engine control unit (ECU) where a plurality of predetermined limit values for engine oil temperatures corresponding to at least one predetermined set of engine operating conditions is stored, the engine control unit configured to select a predetermined limit value for the engine oil temperature corresponding to a measured set of engine operating conditions, to calculate a maintenance limit value using the selected predetermined limit value, and to compare the measured engine oil temperature with the maintenance limit value, the maintenance limit value defining a maximum engine oil temperature that the engine oil is allowed to reach before a predetermined warning is outputted; and

    an output unit capable of outputting the predetermined warning depending on the result of the comparison.

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