Interrelated power delivery controls – including engine control – Transmission control – Engine controlled by transmission
Reexamination Certificate
2008-04-01
2008-04-01
Pang, Roger (Department: 3681)
Interrelated power delivery controls, including engine control
Transmission control
Engine controlled by transmission
C477S143000
Reexamination Certificate
active
07351183
ABSTRACT:
A gear ratio shift control and control method controls gear ratio upshifts in a multiple-ratio transmission for an automotive vehicle. Pressure actuated friction elements establish torque flow paths in transmission gearing as they are selectively engaged and released. A net torque reduction at a transmission torque output shaft during an upshift event is reduced by increasing transmission input torque prior to the start of the inertia phase of the upshift event.
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Cowan Ronald Thomas
Fujii Yuji
Hrovat Davorin David
Kraska Marvin Paul
Ortmann Walter Joseph
Brooks & Kushman P.C.
Ford Global Technologies LLC
Kelly David B.
Pang Roger
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