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AssigneeFord Global Technologies, LLC
InventorsJerry Dean Robichaux, Tobias John Pallett, Gary Bruce Webster
Estimating the term…
A system and method for controlling a vehicular powertrain including an internal combustion engine, an automatic transmission having a plurality of selectable gear ratios, and a controller in communication with the internal combustion engine, the transmission, and an accelerator pedal, include determining a driver requested wheel torque based on position of the accelerator pedal, and determining a vehicle speed ratio changing threshold based on the driver requested wheel torque. In one embodiment, the system and method determine a value indicative of current barometric pressure, determine a current gear ratio, and modify the driver requested wheel torque based on the current barometric pressure and the current gear ratio to determine a compensated wheel torque. The compensated wheel torque is used to determining the ratio changing threshold. Offset values are included to adjust for barometric pressure variation, transmission oil temperature, and to prevent gear hunting or excessive ratio changing.
A method for controlling a vehicular powertrain including an internal combustion engine and an automatic transmission having a plurality of selectable input to output speed ratios, and a controller in communication with the internal combustion engine, the transmission, and an accelerator pedal, the method comprising:
A computer readable storage medium having stored therein data representing instructions executable by a computer to control a vehicle powertrain including an electronic throttle control system and an automatic transmission having a plurality of selectable gear ratios, the computer readable storage medium comprising:
Dependencies are inferred from the claim text.