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METHOD AND SYSTEM FOR CONTROLLING RATE OF CHANGE OF RATIO IN A CONTINUOUSLY VARIABLE TRANSMISSION

  • US 20100280722A1
  • Filed: 04/05/2010
  • Published: 11/04/2010
  • Est. Priority Date: 03/19/2003
  • Status: Active Grant
First Claim
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1. A method for controlling the operation of a continuously variable transmission (CVT), comprising:

  • mapping rate of change of ratio to clamping pressure and/or differential pressure between pulleys in said CVT;

    controlling clamping pressure and/or differential pressure between pulleys in said CVT based on said mapping; and

    applying a torque clipping algorithm adapted to throttle back the torque to the primary pulley when the clamping pressure is insufficient.

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