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US 2022/0213856 A1Published application
Methods and system for starting an engine
AssigneeFord Global Technologies, LLC
InventorsTimothy Baxendale, Thomas Ciccone, Corey Blue
Life of this patent
Estimating the term…
Abstract
Systems and methods for operating various components of a hybrid driveline during starting of an internal combustion engine are described. In one example, output of an electric machine is not adjusted during engine starting when a speed of the electric machine exceeds a threshold speed so that torque reporting is accurate and to ensure combustion is reliable.
Claims20
A method for starting an engine, comprising:
- operating an electric machine in a speed control mode to achieve a first requested speed in response to a request to start an engine;
- closing a driveline disconnect clutch to couple the engine to the electric machine in response to the request to start the engine;
- and
- reducing a speed of the electric machine to a second requested speed in response to a line pressure of a transmission reaching a threshold pressure and a speed of the engine increasing.
1 more element
A system, comprising:
- an electric machine;
- an internal combustion engine;
- a driveline disconnect clutch to selectively couple the electric machine to the internal combustion engine;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to not adjust torque of the electric machine when the electric machine achieves a speed above a first requested speed in response to a request to start the internal combustion engine.
2 more elements
A method for starting an engine, comprising:
- operating an electric machine in a speed control mode to achieve a first requested speed in response to a request to start an engine;
- closing a driveline disconnect clutch to couple the engine to the electric machine in response to the request to start the engine;
- and
- reducing a speed of the electric machine to a second requested speed in response to a line pressure of a transmission reaching a first threshold pressure and a speed of the electric machine exceeding a second threshold.
1 more element
Dependencies are inferred from the claim text.