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Method for predicting reactive clutch loads and preemptively adjusting line pressure

  • US 8,706,371 B1
  • Filed: 02/21/2013
  • Issued: 04/22/2014
  • Est. Priority Date: 02/21/2013
  • Status: Active Grant
First Claim
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1. Method for adjusting hydraulic line pressure applied to a clutch device in an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and at least one electric machine, comprising:

  • predicting a first plurality of powertrain parameters for an upcoming event based on an operator torque request;

    determining, for each of a plurality of available engine torques, a predicted output torque and a predicted clutch load that minimizes a total powertrain operating cost based on the predicted first plurality of powertrain parameters; and

    adjusting hydraulic line pressure based on the engine torque having a lowest powertrain operating cost from among the plurality of available engine torques.

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