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AssigneeGM Global Technology Operations LLC
InventorsGoro Tamai, Birendra P. Bhattarai, William L. Aldrich
Estimating the term…
A method and system to control transmission shifting in a motor vehicle having an automatic transmission is provided, wherein a command for a transmission up-shift is detected, and, inhibited, based upon operator input, engine speed, and vehicle operating conditions. A fuel cutoff event is immediately implemented, along with electrical energy regeneration using vehicle kinetic energy. Operator input includes monitoring accelerator pedal input, and inhibiting the command for the transmission up-shift when a tip-out event occurs. The command for inhibiting the transmission up-shift is discontinued when an accelerator pedal tip-in is detected, or accelerator pedal position is greater than a calibrated value, or when engine output torque exceeds a torque threshold, or when engine speed exceeds a speed threshold.
Method to control transmission shifting in a vehicle having an internal combustion engine operably connected to an automatic transmission operably connected to a vehicle driveline, said shifting controlled using a predetermined gear shifting pattern, comprising:
Method to optimize fuel economy of a vehicle having an internal combustion engine operably connected to an automatic transmission operably connected to a vehicle driveline, wherein shifting of the automatic transmission is controlled using a predetermined gear shifting pattern, comprising:
Article of manufacture, comprising a storage medium having a computer program encoded therein for effecting a method to control an automatic transmission operably connected to an internal combustion engine of a vehicle, comprising:
Dependencies are inferred from the claim text.