Method for load-based stabilization of mode and fixed gear operation of a hybrid powertrain system
First Claim
1. Method for controlling a powertrain system including an engine mechanically coupled to an electro-mechanical transmission selectively operative in one of a plurality of transmission operating range states and one of a plurality of engine states, comprising:
- determining a current transmission operating range state and engine state;
determining at least one potential transmission operating range state and engine state;
determining preferability factors associated with the current transmission operating range state and engine state, and potential transmission operating range states and engine states, wherein said preferability factors associated with potential transmission operating range states include load-stabilizing preferability factors;
preferentially weighting the preferability factors for the current transmission operating range state and engine state; and
selectively commanding changing the current transmission operating range state and engine state based upon said preferability factors.
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Accused Products
Abstract
A powertrain system includes an engine mechanically coupled to an electromechanical transmission selectively operative in one of a plurality of transmission operating range states and one of a plurality of engine states. A method for controlling the powertrain system includes determining a current transmission operating range state and engine state, determining at least one potential transmission operating range state and engine state, determining preferability factors associated with the current and potential transmission operating range state and the engine state wherein the preferability factors associated with potential transmission operating range states include load-stabilizing preferability factors, preferentially weighting the preferability factors for the current transmission operating range state and engine state, and selectively commanding changing the present transmission operating range state and engine state based upon the preferability factors.
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Citations
17 Claims
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1. Method for controlling a powertrain system including an engine mechanically coupled to an electro-mechanical transmission selectively operative in one of a plurality of transmission operating range states and one of a plurality of engine states, comprising:
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determining a current transmission operating range state and engine state; determining at least one potential transmission operating range state and engine state; determining preferability factors associated with the current transmission operating range state and engine state, and potential transmission operating range states and engine states, wherein said preferability factors associated with potential transmission operating range states include load-stabilizing preferability factors; preferentially weighting the preferability factors for the current transmission operating range state and engine state; and selectively commanding changing the current transmission operating range state and engine state based upon said preferability factors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A system for controlling a powertrain system including an engine mechanically coupled to an electromechanical transmission selectively operative in one of a plurality of transmission operating range states and one of a plurality of engine states, comprising:
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a microprocessor configured to receive data and provide an output, said data including a first set of preferability factors, a second set of preferability factors relating to desired operating range states of said transmission, a third set of preferability factors relating to current operating range states of said transmission, and a fourth set of preferability factors, said fourth set of preferability factors comprising load-stabilizing preferability factors; a control module configured to control shifting events in said transmission, said control module having inputs and outputs, wherein output from said microprocessor is provided as input to said control module, said control module being configured to provide said third set of preferability factors to said microprocessor as an input thereto; and said electro-mechanical transmission in effective electrical communication with output from said control module.
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Specification