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Trimmed lock-up clutch

  • US 9,670,972 B2
  • Filed: 04/28/2014
  • Issued: 06/06/2017
  • Est. Priority Date: 04/28/2014
  • Status: Active Grant
First Claim
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1. A method of damping torsional vibrations in a drive line including a clutch, the method comprising the steps of:

  • controlling a clutch slip speed of the clutch, and an output shaft speed of the drive; and

    wherein said controlling step includes maintaining a positive slope of a total torque of the drive line versus the clutch slip speed and wherein the maintaining the positive slope of the total torque of the drive line versus the clutch slip speed occurs at a slip speed of less than about 30 rotations per minute.

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