Method and apparatus for controlling vehicle battery charging
First Claim
1. Control system for a charging system operable to supply electrical energy to an electrical energy storage system of a vehicle having a hybrid propulsion system including an internal combustion engine, operable to provide propulsion torque to a driveline of the vehicle, and operable to provide charging torque to the charging system, comprising:
- the control system, operable to;
determine a state-of-charge of the electrical energy storage system;
determine operating efficiency of the internal combustion engine; and
, control operation of the charging system, based upon;
the state-of-charge of the electrical energy storage system, and, the operating efficiency of the internal combustion engine.
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Accused Products
Abstract
An electrical charging strategy and system for a high voltage electrical energy storage system able to supply electrical energy to a hybrid vehicle is disclosed. The system charges the electrical energy storage system so state-of-charge at the end of a trip is substantially unchanged. The strategy and system employs opportunity charging to achieve maximum energy efficiency of the hybrid system, thus minimizing fuel consumption and maximizing fuel economy. The charging system operation is controlled, based upon: the state-of-charge of the electrical energy storage system, and, the operating efficiency of the internal combustion engine. Battery life is likewise extended through use of this strategy.
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Citations
19 Claims
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1. Control system for a charging system operable to supply electrical energy to an electrical energy storage system of a vehicle having a hybrid propulsion system including an internal combustion engine, operable to provide propulsion torque to a driveline of the vehicle, and operable to provide charging torque to the charging system, comprising:
- the control system, operable to;
determine a state-of-charge of the electrical energy storage system;
determine operating efficiency of the internal combustion engine; and
,control operation of the charging system, based upon;
the state-of-charge of the electrical energy storage system, and, the operating efficiency of the internal combustion engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- the control system, operable to;
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12. Method to control operation of a charging system for an electrical energy storage system of a vehicle having a hybrid propulsion system comprising:
- an internal combustion engine, and, an electric generator operably coupled to the engine and having an electrical output to an electrical energy storage system, comprising;
determining a state-of-charge of the electrical energy storage system;
determining operating efficiency of the internal combustion engine; and
,controlling operation of the charging system, based upon;
the state-of-charge of the electrical energy storage system, and, the operating efficiency of the internal combustion engine. - View Dependent Claims (13, 14, 15)
- an internal combustion engine, and, an electric generator operably coupled to the engine and having an electrical output to an electrical energy storage system, comprising;
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16. Method to optimize life of an electrical energy storage system, comprising:
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determining a state-of-charge of the electrical energy storage system;
determining operating efficiency of the internal combustion engine;
determining an operating point of the internal combustion engine;
controlling operation of the electrical charging system, based upon;
the state-of-charge of the electrical energy storage system, the operating efficiency of the internal combustion engine, and, the engine operating point;
selectively operating the electrical charging system when a change in the operating efficiency due to operation of the electrical charging system exceeds a predetermined value;
increasing range of engine operation at which the electrical charging system operates, based upon a decrease in the state-of-charge;
limiting range of engine operation at which the electrical charging system operates, based upon an increase in the state-of-charge, and, discontinuing operation of the electrical charging system when the state-of-charge exceeds a maximum value. - View Dependent Claims (17)
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18. Method to control operation of a charging system for an electrical energy storage system of a vehicle having a hybrid propulsion system including an internal combustion engine and an electric generator operably coupled to the engine and having an electrical output to an electrical energy storage system, comprising:
controlling operation of the charging system to bias charging of the energy storage system during periods of engine operation whereat charging induced increases in engine loads result in relatively greater operating efficiency of the internal combustion engine. - View Dependent Claims (19)
Specification