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US 10,899,335 B2Granted
Methods and systems for a hybrid vehicle
AssigneeFord Global Technologies, LLC
InventorsKevin Ray Ruybal, Jeffrey Allen Doering, Jason Meyer, Michael Glenn Fodor, Xiaoyong Wang
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for operating a driveline of a hybrid vehicle that includes an internal combustion engine, an electric machine, and a transmission are described. In one example, the engine is started and coupled to the driveline via closing a clutch of a dual clutch transmission. Speed of the engine and clutch pressure are controlled to reduce driveline torque disturbances and provide a desired wheel torque.
Claims11
A driveline operating method, comprising:
- propelling a vehicle solely via an electric machine while an engine of the vehicle is decoupled from a driveline of the vehicle, the electric machine positioned in the driveline downstream of a transmission;
- starting the engine and prepositioning a clutch of the transmission in response to an increasing demand torque, the clutch prepositioned via partially filling the clutch with fluid and transferring an amount of torque through the clutch less than or equal to a threshold amount;
- accelerating the engine in a speed control mode to a speed greater than a desired transmission input shaft speed in response to output torque of the electric machine exceeding a threshold;
- and
- increasing a slip of the clutch in response to a decrease in desired driveline torque.
2 more elements
A system, comprising:
- an engine;
- a dual clutch transmission coupled to the engine, the dual clutch transmission not including a parking pawl;
- an electric machine coupled to the dual clutch transmission;
- and
- a controller including executable instructions stored in non-transitory memory to propel a vehicle solely via the electric machine while the engine is decoupled from a driveline, the electric machine positioned in the driveline downstream of the dual clutch transmission, shifting gears of the dual clutch transmission while the engine has stopped rotating;
- starting the engine and prepositioning a clutch of the dual clutch transmission in response to an increasing demand torque, the clutch prepositioned via partially filling the clutch with fluid and transferring an amount of torque through the clutch less than or equal to a threshold amount;
- and adjusting a torque transfer capacity of the clutch in response to an increase in driveline demand torque.
4 more elements
Dependencies are inferred from the claim text.