System and method for controlling a transmission gear shift
AssigneeFord Global Technologies, LLC
InventorsBernard D. Nefcy, Christopher Alan Lear, Mark Steven Yamazaki
Life of this patent
Estimating the term…
Abstract
A system and method for controlling a transmission gear shift in a vehicle having a driveline and an electric motor operable to output torque to the driveline includes applying a negative motor torque to the driveline to reduce driveline oscillations resulting from the transmission gear shift. The negative motor torque is based on vehicle conditions occurring after the transmission gear shift has begun and before the transmission gear shift is complete.
Claims12
A method for controlling a transmission gear shift in a vehicle having a driveline and an electric motor, comprising:
- applying a negative motor torque to the driveline to reduce driveline oscillations resulting from the transmission gear shift, the negative motor torque being based on vehicle conditions occurring at a predetermined percentage of completion of the transmission gear shift indicated by a comparison of an output speed of the transmission to:
- an input speed of the transmission translated to an off-going gear ratio in the transmission, and
- the input speed of the transmission translated to an oncoming gear ratio in the transmission.
A method for controlling a transmission gear shift in a vehicle having a driveline and an electric motor, comprising:
- applying a negative motor torque to the driveline after an end of the transmission gear shift when an oncoming clutch is capacitized to a predetermined level, the negative motor torque being based on vehicle conditions occurring at a stage of the transmission gear shift prior to completion of the transmission gear shift.
A system for controlling a transmission gear shift in a vehicle having a driveline, comprising:
- an electric motor;
- and
- at least one controller configured to control the motor to apply a torque to the driveline to reduce driveline oscillations resulting from the transmission gear shift, the torque being based on vehicle conditions occurring after the transmission gear shift has begun and at a predetermined percentage of completion of the transmission gear shift indicated by a comparison of an output speed of the transmission to an input speed of the transmission translated to an off-going gear ratio in the transmission, and the input speed of the transmission translated to an oncoming gear ratio in the transmission.
Dependencies are inferred from the claim text.