METHOD FOR PREFERENTIAL SELECTION OF MODE AND GEAR AND INPUT SPEED BASED ON MULTIPLE ENGINE STATE FUELING COSTS FOR A HYBRID POWERTRAIN SYSTEM
First Claim
1. A method for controlling operation of a powertrain including an engine coupled to an input member of a hybrid transmission including first and second torque generating machines to transmit power to an output member, the engine selectively operative in one of an all-cylinder state and a cylinder deactivation state, the method comprising:
- determining an operator torque request;
iteratively selecting candidate engine operating points;
determining an engine power cost for each candidate engine operating point;
determining torque outputs from the first and second torque generating machines based upon the candidate engine operating point and the operator torque request; and
determining a total powertrain system power loss for each candidate engine operating point based upon the engine power cost and the torque outputs from the first and second torque generating machines.
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Accused Products
Abstract
A method for controlling a hybrid powertrain system including an engine selectively operative in one of an all-cylinder state and a cylinder deactivation state based upon power costs includes determining engine power costs for each operating range state of the transmission, determining a system power cost, selecting a preferred cost and corresponding engine operating points, selecting a preferred operating range state, selecting the engine state, and controlling the engine based upon the selected operating range state, the selected engine state, and the engine operating points.
291 Citations
19 Claims
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1. A method for controlling operation of a powertrain including an engine coupled to an input member of a hybrid transmission including first and second torque generating machines to transmit power to an output member, the engine selectively operative in one of an all-cylinder state and a cylinder deactivation state, the method comprising:
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determining an operator torque request; iteratively selecting candidate engine operating points; determining an engine power cost for each candidate engine operating point; determining torque outputs from the first and second torque generating machines based upon the candidate engine operating point and the operator torque request; and determining a total powertrain system power loss for each candidate engine operating point based upon the engine power cost and the torque outputs from the first and second torque generating machines. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for controlling an internal combustion engine operatively connected to a hybrid transmission, the engine selectively operative in an engine state including one of an all-cylinder state and a cylinder deactivation state, the method comprising:
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determining an operator torque request; executing a search engine to iteratively select candidate engine operating points; determining an engine power cost for each candidate engine operating point; determining torque outputs from the first and second torque generating machines based upon the candidate engine operating point and the operator torque request; determining a total powertrain system power loss for each candidate engine operating point based upon the engine power cost and the torque outputs from the first and second torque generating machines; selecting a preferred engine operating point; selecting the engine state comprising one of the all-cylinder state and the cylinder deactivation state based upon the preferred engine operating point; and controlling the engine based upon the selected engine state and the engine operating point. - View Dependent Claims (12, 13, 14, 15)
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16. A method for operating a powertrain system including an engine and a plurality of electric machines coupled to a transmission selectively operative in one of a plurality of operating range states to transfer power to an output member, the engine selectively operative in an engine state including one of an all-cylinder state and a cylinder deactivation state, the method comprising:
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determining an operator torque request; iteratively selecting candidate engine operating points for each of the transmission operating range states; determining an engine power cost for each candidate engine operating point for each of the transmission operating range states; determining torque outputs from the first and second torque generating machines based upon the candidate engine operating point and the operator torque request; and determining a total powertrain system power loss for each candidate engine operating point for each of the transmission operating range states based upon the engine power cost and the torque outputs from the first and second torque generating machines; and selecting a preferred transmission operating range state, a preferred engine state, and a preferred engine operating point based upon the total powertrain system power loss. - View Dependent Claims (17, 18, 19)
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Specification