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US 10,549,744 B2Granted
Methods and system for downshifting a transmission
AssigneeFord Global Technologies, LLC
InventorJeffrey Allen Doering
Life of this patent
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Abstract
Systems and methods for operating a driveline of a hybrid vehicle are disclosed. In one example, an engine may enter or stay in one of two cylinder deactivation modes or enter or stay in a combustion mode in response to a request to downshift a transmission while a vehicle in which the engine resides is coasting.
Claims20
A driveline operating method, comprising:
- via a controller, adjusting an amount of torque of a motor, adjusting a state of an engine cylinder poppet valve actuator, and adjusting, via activating or deactivating, a fuel injector operating state via one or more controllers in response to an increase in an amount of requested transmission input shaft torque and a transmission downshift request during vehicle coasting.
A driveline operating method, comprising:
- operating with an engine rotating while driver demand torque is less than a threshold;
- and
- entering the engine into a first or second cylinder deactivation mode in response to a transmission gear downshift request while the engine is rotating and while driver demand torque is less than the threshold, the engine entering the first or second cylinder deactivation mode in response to torque capacity of a motor and engine torque capacity in each of the first and second cylinder deactivation modes.
A system, comprising:
- an engine;
- an integrated starter/generator coupled to the engine;
- a transmission coupled to the integrated starter/generator;
- and
- a vehicle system controller including executable instructions stored in non-transitory memory to maintain or increase torque output of the integrated starter/generator and enter the engine into one of two cylinder deactivation modes in response to a request to downshift a transmission while a vehicle in which the engine resides is coasting.
2 more elements
Dependencies are inferred from the claim text.