Control strategy for multi-mode vehicle propulsion system
AssigneeFord Global Technologies, LLC
InventorsHarald Stoffels, Klemens Grieser
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Abstract
A method for controlling a propulsion system for a vehicle including a transmission coupling an output shaft of the internal combustion engine to a drive wheel of the vehicle, wherein said transmission includes a lash region, the method comprising of adjusting an operating parameter of the engine so that at least one cylinder of the engine is transitioned between a first combustion mode and a second combustion mode, and varying a timing of said transition responsive to whether the transmission is operating within the lash region of the transmission.
Claims6
A method of operating a hybrid propulsion system for a vehicle, the hybrid propulsion system including at least an internal combustion engine and a motor both coupled to a drive wheel by a driveline, wherein said driveline includes at least one lash region, the method comprising:
- operating the engine to provide a first torque to the driveline;
- operating the motor to exchange a second torque with the driveline;
- and
- varying an amount of said second torque responsive to an amount of said first torque at least during a transition through said lash region.
Dependencies are inferred from the claim text.