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US 10,857,993 B2Granted
Methods and system activating a vehicle
AssigneeFord Global Technologies, LLC
InventorsKendrick Morrison, Andrew E. Burt, Christopher A. Lear
Life of this patent
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Abstract
Systems and methods for operating a hybrid powertrain or driveline that includes an engine and an integrated starter/generator are described. In one example, the integrated starter/generator may rotate a torque converter during a vehicle activation process if a vehicle soak time exceeds a threshold. The integrated starter/generator may not rotate the torque converter during a vehicle activation process if a vehicle soak time is less than the threshold.
Claims20
A powertrain operating method, comprising:
- via a controller, rotating a torque converter impeller during a vehicle activation while a vehicle soak time is indicative of less than a threshold amount of fluid in a torque converter;
- and
- via the controller, not rotating the torque converter impeller during the vehicle activation while the vehicle soak time is indicative of more than the threshold amount of fluid in the torque converter.
A powertrain operating method, comprising:
- updating parameters of a torque converter fluid draining model responsive to a difference between a torque converter impeller speed and a torque converter turbine speed, the speed difference occurring during a first vehicle activation;
- and
- rotating or not rotating a torque converter impeller via an electric machine during a second vehicle activation according to a first threshold amount of time that is based on the torque converter fluid draining model.
A system, comprising:
- an engine;
- an integrated starter/generator (ISG);
- a driveline disconnect clutch coupled to the engine and the ISG;
- a transmission including a torque converter coupled to the ISG, the torque converter including an impeller and a turbine;
- and
- a controller including executable instructions stored in non-transitory memory to rotate the impeller at a first speed via the controller for vehicle soak times greater than a first amount of time and less than a second amount of time, and to rotate the impeller at a second speed for vehicle soak times greater than the second amount of time via the controller.
3 more elements
Dependencies are inferred from the claim text.