Adaptive controls of engine disconnect clutch
AssigneeFord Global Technologies, LLC
InventorsAkshay Bichkar, Jason Meyer
Life of this patent
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Abstract
A hybrid vehicle includes an engine, an electric machine, and a clutch configured to selectively couple the engine to the electric machine. A controller is programmed to command a torque to the electric machine based on a clutch model that includes a learned time constant previously selected using a family of candidate time constants based on a comparison of the family to measured pressure data of a previous engagement of the clutch.
Claims20
A hybrid vehicle comprising:
- an engine;
- an electric machine;
- a clutch configured to selectively couple the engine to the electric machine;
- and
- a controller programmed to, responsive to an engine-start request, command a torque to the electric machine based on a clutch model that includes a learned time constant previously selected from a family of candidate time constants, each associated with a candidate clutch model, based on a comparison of the candidate clutch model to measured pressure data of a previous engagement of the clutch.
A hybrid vehicle comprising:
- an engine;
- an electric machine;
- a clutch configured to selectively couple the engine to the electric machine;
- and
- a controller programmed to command a torque to the electric machine based on a clutch model that includes a learned time constant previously selected using a family of candidate time constants based on a comparison of the family to measured pressure data of a previous engagement of the clutch.
A method of controlling a disconnect clutch configured to selectively couple an engine and an electric machine, the method comprising:
- commanding a torque to an electric machine based on a clutch model that includes a learned time constant previously selected using a family of candidate time constants, each associated with a candidate clutch model, based on a comparison of the candidate clutch models to measured pressure data of a previous engagement of the clutch.
Dependencies are inferred from the claim text.