Ford Global Technolgoies, LLC

Nicholas Joseph Witte

Joseph F Kucharski

Gregory Michael Pietron

Bradley Dean Riedle

Yuji Fujii

Diana Yanakiev

Davorin David Hrovat

Stephen Michael Cicala

Nimrod Kapas

Charles William Suter

Jianping Zhang

Daniel T Lin

David M Dillon

Michael J O'Day

A transmission and control method are disclosed which ensure proper stroke pressure and minimize torque transients during a shift event. The transmission includes a clutch having a torque capacity based on a fluid pressure, a torque sensor adapted to measure a torque value that varies in relationship to the torque capacity, and a controller. The method includes varying the fluid pressure around a predetermined value, measuring a resulting torque difference with the torque sensor, and adjusting a clutch control parameter if the resulting torque difference is less than a threshold value.

Transmission and method of controlling clutch during ratio change

A method for controlling wheel-hop in a vehicle driveline includes detecting that a wheel-hop condition occurs upon determining an amplitude and frequency of speed oscillations of a component that transmits power to wheels of the driveline, engaging a transmission friction clutch that transmits torque in the driveline between an engine and the wheels, and modulating requested engine torque.

Controlling wheel hop in a vehicle driveline

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Wixom, MI, United States of America

Nicholas Joseph Witte