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US 10,160,440 B2Granted
Methods and system for controlling driveline torque
AssigneeFord Global Technologies, LLC
InventorsRajit Johri, Fazal Urrahman Syed, Ming Lang Kuang
Life of this patent
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Abstract
Systems and methods for operating a hybrid powertrain that includes an engine and a motor/generator are described. The systems and methods adjust torque converter clutch opening responsive to whether or not a motor/generator is available to provide a negative torque to a driveline. Further, the motor/generator and the vehicle's engine are operated to provide a desired amount of driveline braking.
Claims9
A powertrain operating method, comprising:
- providing a negative input torque to a transmission via a motor in response to the motor being available to supply the negative input torque and driver demand torque less than a threshold;
- providing the negative input torque to the transmission via an engine operating in a deceleration fuel cut off mode in response to the motor being unavailable to supply the negative input torque and the driver demand torque less than the threshold;
- and
- opening a torque converter clutch in response to a request to enter a gear having a ratio greater than a threshold and the motor being unavailable to supply the negative input torque.
1 more element
Dependencies are inferred from the claim text.