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Methods and systems for reducing gear lash noise

  • US 8,965,616 B2
  • Filed: 02/25/2013
  • Issued: 02/24/2015
  • Est. Priority Date: 05/04/2012
  • Status: Active Grant
First Claim
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1. A method for controlling driveline lash, comprising:

  • shifting a transmission to a gear that permits an electric machine that is coupled to the transmission to operate at a lower speed than a base speed of the electric machine in response to a decrease in a driver demand torque; and

    reducing gear tooth to gear tooth impact via operating the electric machine in a speed control mode during a driveline torque transition from a negative torque to a positive torque.

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