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METHOD AND APPARATUS TO CONTROL WARM-UP OF AN EXHAUST AFTERTREATMENT SYSTEM FOR A HYBRID POWERTRAIN

  • US 20090118969A1
  • Filed: 09/19/2008
  • Published: 05/07/2009
  • Est. Priority Date: 11/07/2007
  • Status: Active Grant
First Claim
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1. A method of controlling an internal combustion engine during an operating cycle, said engine fluidly connected to an exhaust aftertreatment system and operatively connected to a transmission to transmit tractive power to a driveline, the method comprising;

  • monitoring ambient operating conditions and engine operating conditions;

    determining a temperature of the exhaust aftertreatment system;

    determining a preferred engine operation to achieve a preferred temperature of the exhaust aftertreatment system and to minimize a total energy loss during the engine operating cycle;

    controlling the engine to the preferred engine operation; and

    controlling the transmission to achieve a torque output based upon the preferred engine operation.

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