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METHOD FOR CONTROLLING POWERTRAIN PUMPS

  • US 20130046425A1
  • Filed: 08/17/2011
  • Published: 02/21/2013
  • Est. Priority Date: 08/17/2011
  • Status: Active Grant
First Claim
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1. A method of controlling a first pump supplying a fluid to a transmission within a powertrain, comprising:

  • sensing a requested power for the powertrain, wherein the requested power substantially meets the needs of the powertrain;

    sensing an excess power for the powertrain, wherein the excess power is non-zero and is not included in the requested power;

    sensing a triggering condition, wherein the triggering condition occurs in response to the ability to convert the excess power into heat in the transmission;

    determining a calibrated baseline command for the first pump, wherein the calibrated baseline command is configured to supply the fluid based upon the requested power;

    determining that an operating temperature of the transmission is below a minimum-efficiency temperature;

    determining a first dissipation command for the first pump, wherein the first dissipation command is configured to consume the excess power with the first pump; and

    operating the first pump at a combined command equal to the calibrated baseline command plus the first dissipation command.

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