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Method for controlling a hybrid drive

  • US 8,651,998 B2
  • Filed: 08/14/2007
  • Issued: 02/18/2014
  • Est. Priority Date: 10/12/2006
  • Status: Active Grant
First Claim
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1. A method for controlling a hybrid drive of a vehicle, having at least one internal combustion engine, at least one electric machine, a first clutch situated between the electric machine and a drive train of the vehicle, and a second clutch situated between the electric machine and the internal combustion engine, comprising:

  • applying a predefinable clutch torque to the second clutch for a start of the internal combustion engine by the operating electric machine;

    monitoring a rotational speed of the internal combustion engine; and

    incrementing the clutch torque to a higher value if the rotational speed of the internal combustion engine is less than a predefinable threshold value within a predefinable time interval, wherein the clutch torque resulting in a successful start of the internal combustion engine is predefined as a setpoint value for a subsequent start of the internal combustion engine.

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