METHOD FOR OPERATING AN ENGINE IN A HYBRID POWERTRAIN SYSTEM
First Claim
1. Method for controlling an engine and an electric machine operative to communicate tractive power with a transmission device to control output power to an output member, said electric machine electrically coupled to an energy storage device, the method comprising:
- monitoring an operator request for power;
monitoring a state of charge of the energy storage device;
determining an operating cost for each of a plurality of candidate engine operating points based on the operator request for power and the state of charge of the energy storage device; and
operating the engine at the candidate engine operating point having a preferred operating cost.
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Accused Products
Abstract
An engine and an electric machine are operative to communicate tractive power with a transmission device to control output power to an output member. The electric machine is electrically coupled to an energy storage device. A method for controlling the engine and electric machine includes monitoring an operator request for power, monitoring a state of charge of the energy storage device, determining an operating cost for each of a plurality of candidate engine operating points based on the operator request for power and the state of charge of the energy storage device; and operating the engine at the candidate engine operating point having a preferred operating cost.
207 Citations
20 Claims
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1. Method for controlling an engine and an electric machine operative to communicate tractive power with a transmission device to control output power to an output member, said electric machine electrically coupled to an energy storage device, the method comprising:
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monitoring an operator request for power; monitoring a state of charge of the energy storage device; determining an operating cost for each of a plurality of candidate engine operating points based on the operator request for power and the state of charge of the energy storage device; and operating the engine at the candidate engine operating point having a preferred operating cost. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. Method for controlling an engine and an electric machine to communicate tractive power with a transmission device to control power to an output member, said electric machine electrically coupled to an energy storage device, the method comprising:
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monitoring an operator request for power; monitoring a state of charge of the energy storage device; selecting a candidate engine operating point for each of a plurality of engine states; determining an operating cost for each of the candidate engine operating points for each of the plurality of engine states based on the operator request for power and the state of charge of the energy storage device; and operating the engine at the candidate engine operating point having a preferred operating cost. - View Dependent Claims (16, 17, 18, 19)
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20. Method for controlling an engine and an electric machine to communicate tractive power with a transmission device to control output power to an output member, said electric machine electrically coupled to an energy storage device, the method comprising:
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monitoring an operator torque request; monitoring a state of charge of the energy storage device; determining operating costs for each of a plurality of candidate engine torques for a candidate engine state based on the operator request for power and the state of charge of the energy storage device; and operating the engine at the candidate engine state and the candidate engine operating point having a minimum operating cost.
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Specification