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Methods and system for transitioning between control modes while creeping

  • US 9,573,579 B2
  • Filed: 07/30/2014
  • Issued: 02/21/2017
  • Est. Priority Date: 07/30/2014
  • Status: Active Grant
First Claim
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1. A driveline method, comprising:

  • operating a torque source in a speed control mode during a vehicle creep mode while a clutch of a torque converter is open;

    transitioning operating the torque source from the speed control mode to a torque control mode and locking the clutch during the vehicle creep mode in response to a vehicle operating condition; and

    adjusting torque of the torque source in response to torque converter impeller speed when the torque converter clutch is unlocked.

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