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US 10,207,696 B2Granted
Timing transmission gearing shifts for a hybrid electric powertrain
AssigneeFord Global Technologies, LLC
InventorsBernard D. Nefcy, Marvin P. Kraska, Daniel S. Colvin
Life of this patent
Estimating the term…
Abstract
A transmission shift is timed for a hybrid electric powertrain as a function of a torque capacity of an electric machine relative to a shifting torque required to change gearings of a transmission. A vehicle is being propelled by the machine, with an engine stopped, when the shift is requested. If the machine has insufficient torque capacity to change transmission gearings, then the shift request is delayed until the engine has started.
Claims11
A method of controlling a hybrid powertrain comprising:
- receiving a transmission shift request while an electric machine, which is always drivingly connected to vehicle wheels, is propelling a vehicle and an engine is stopped;
- and
- timing completion of the shift request as a function of a torque capacity of the machine relative to a shifting torque required to complete the shift request.
A method of controlling a hybrid powertrain comprising:
- receiving an acceleration request while an electric machine is propelling a vehicle and an engine is stopped, where downshifting a transmission and starting the engine are needed to meet the acceleration request;
- and
- timing downshifting the transmission as a function of a torque capacity of the machine relative to a shifting torque required to downshift the transmission by changing transmission gearings.
Dependencies are inferred from the claim text.