Abstract: A control system and control method for a swap-shift transmission having auxiliary and main gearsets wherein precise synchronization control of ratio changes of each gearset at the start and at the end of a swap-upshift progression is achieved using an adaptive control to adjust friction element pressure values and slip times for friction elements of each gearset, whereby shift synchronization is achieved throughout the operating life of the transmission.
Type:
Grant
Filed:
November 13, 2003
Date of Patent:
October 3, 2006
Assignee:
Ford Global Technologies, LLC
Inventors:
Ihab Soliman, Brian Keyse, Steve Cicala, Ken Sovel, Charles Suter, Bradley Riedle