METHOD FOR OPERATING A HYBRID ELECTRIC POWERTRAIN BASED ON PREDICTIVE EFFECTS UPON AN ELECTRICAL ENERGY STORAGE DEVICE
First Claim
1. Method for operating a hybrid electric powertrain including an electrical energy storage device adapted for exchanging electrical energy with a hybrid vehicular powertrain including first and second electric machines, each machine operable to impart torque to a two-mode, compound-split electro-mechanical transmission having four fixed gear ratios and two continuously variable operating modes, comprising:
- establishing a plurality of values for current of the electrical energy storage device during periods of vehicle activity;
for each respective value, determining a corresponding change in state of life for the energy storage device based upon said respective value; and
operating the electric machines based on the determined changes in state of life.
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Accused Products
Abstract
A hybrid electric powertrain includes an electrical energy storage device and electric machines. A method for operating the powertrain is disclosed to control the electric machines effective to attain a predetermined state of life profile for the electric energy storage device.
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Citations
19 Claims
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1. Method for operating a hybrid electric powertrain including an electrical energy storage device adapted for exchanging electrical energy with a hybrid vehicular powertrain including first and second electric machines, each machine operable to impart torque to a two-mode, compound-split electro-mechanical transmission having four fixed gear ratios and two continuously variable operating modes, comprising:
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establishing a plurality of values for current of the electrical energy storage device during periods of vehicle activity; for each respective value, determining a corresponding change in state of life for the energy storage device based upon said respective value; and operating the electric machines based on the determined changes in state of life. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Method for operating a hybrid electric powertrain including an electrical energy storage device adapted for exchanging electrical energy with a hybrid vehicular powertrain including first and second electric machines, each machine operable to impart torque to a two-mode, compound-split electro-mechanical transmission having four fixed gear ratios and two continuously variable operating modes, comprising:
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providing a plurality of potential currents for the electrical energy storage device during periods of vehicle activity; for each potential current, predicting a respective effect upon electrical energy storage device state of life; and operating the electric machines based on the predicted effects upon electrical energy storage device state of life. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 18, 19)
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16. Method for operating a hybrid electric powertrain including an electrical energy storage device adapted for exchanging electrical energy with a hybrid vehicular powertrain including first and second electric machines, each machine operable to impart torque to a two-mode, compound-split electro-mechanical transmission having four fixed gear ratios and two continuously variable operating modes, comprising:
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providing a plurality of predicted effects upon electrical energy storage device state of life based on a plurality of potential electrical energy storage device currents during periods of vehicle activity; providing a target profile for electrical energy storage device state of life; and establishing electric machine current based on the predicted effects and target profile. - View Dependent Claims (17)
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Specification