Brooks Kushman P.C.
Automatic transmission shift control based on clutch torque capacity detection using calculated transmission input torque
A system and method for controlling a vehicle powertrain having a transmission to improve shift quality is based on detection of an initial rise time of an on-coming clutch torque capacity, which indicates the start of the torque phase. The initial rise time is detected using a transmission input shaft torque computation. The system may include a vehicle powertrain having an engine, a transmission coupled to the engine via a torque converter and a controller configured to initiate torque phase control when a difference between a first transmission input shaft torque and a second transmission input shaft torque exceeds a first predetermined threshold parameter during a shift event characterized by a preparatory phase, a torque phase and an inertia phase.
Ford Global Technologies, LLC
F F
F16H F16H
additional inventional
Seung-Hoon Christopher John Bradley Dean Michael Glenn Yuji
Lee Teslak Riedle Fodor Fujii