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Clutch Torque Trajectory Correction to Provide Torque Hole Filling During a Ratio Upshift

  • US 20120316738A1
  • Filed: 06/08/2011
  • Published: 12/13/2012
  • Est. Priority Date: 06/08/2011
  • Status: Active Grant
First Claim
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1. A powertrain having a source of input torque and a multiple ratio power transmission with oncoming and off-going friction elements, and a shift controller configured for correcting an estimated oncoming friction element torque during a torque phase of a ratio shift using a measured powertrain operating variable whereby an increasing torque for the oncoming friction element is achieved with minimal torque transients during the torque phase.

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