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US 12,304,457 B2Granted
System and method for starting an engine
AssigneeFord Global Technologies, LLC
InventorsMaruthi Ravichandran, Rajit Johri, Steven Anatole Frait
Life of this patent
Estimating the term…
Abstract
Systems and methods for operating a driveline of a hybrid vehicle are presented. In one example, an electrically driven transmission fluid pump may be deactivated in response to an engine pull-up request so that a driveline disconnect clutch may provide more consistent torque transfer capacity during closing of the driveline disconnect clutch.
Claims17
A method for operating a vehicle, comprising:
- via one or more controllers,
- detecting an engine pull-up request, and deactivating an electric transmission fluid pump from an activated state while an engine of the vehicle is stopped in response to the engine pull-up request;
- maintaining a state where both the electric transmission fluid pump is deactivated and the engine of the vehicle is stopped simultaneously for a period of time after receiving the engine pull-up request and before starting the engine of the vehicle;
- and then
- starting the engine of the vehicle via an engine starting device after deactivating the activated electric transmission fluid pump while the engine was stopped.
2 more elements
A system, comprising:
- an internal combustion engine;
- an integrated starter/generator;
- a disconnect clutch positioned in a driveline between the internal combustion engine and the integrated starter/generator;
- a transmission included in the driveline;
- an electric transmission fluid pump;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to:
- activate the electric transmission fluid pump while the internal combustion engine is stopped in response to a temperature of the integrated starter/generator exceeding a threshold temperature,
- detect an engine pull-up request,
- deactivate the electric transmission fluid pump while the internal combustion engine is still stopped in response to the engine pull-up request and while the temperature of the integrated starter/generator still exceeds the threshold temperature,
- maintain a state where simultaneously the electric transmission fluid pump is deactivated, the internal combustion engine of the vehicle is stopped, and the temperature of the integrated starter/generator still exceeds the threshold temperature after receiving the engine pull-up request and before starting the internal combustion engine of the vehicle;
- and then
- start the internal combustion engine via an engine starting device in response to the engine pull-up request.
10 more elements
A method for operating a vehicle, comprising:
- via one or more controllers,
- detecting an engine pull-up request;
- deactivating an activated electric transmission fluid pump while an engine of the vehicle is stopped in response to the engine pull-up request;
- maintaining a state where both the electric transmission fluid pump is deactivated and the engine of the vehicle is stopped simultaneously for a period of time after receiving the engine pull-up request and before starting the engine of the vehicle;
- then
- starting the engine responsive to the engine pull-up request after deactivating the activated electric transmission fluid pump;
- and
- via the one or more controllers, reactivating the activated electric transmission fluid pump in response to a driveline disconnect clutch being fully closed.
5 more elements
Dependencies are inferred from the claim text.