Method and control architecture for selection of optimal engine input torque for a powertrain system
First Claim
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1. Method for operating an internal combustion engine adapted to transmit torque to a hybrid transmission, comprising:
- determining an engine input torque range transmittable to the hybrid transmission for each respective engine state of a plurality of engine states;
determining costs for operating the engine and hybrid transmission in the determined engine input torque range for each respective engine state to substantially meet an operator torque request, the determined costs based on factors related to vehicle drivability, fuel economy, emissions and battery life;
selecting a preferred engine state and a preferred engine input torque based upon the determined costs; and
,controlling the engine based upon the preferred engine state and the preferred engine input torque to substantially meet an operator torque request.
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Abstract
A method and article of manufacture are provided for operating an internal combustion engine adapted to transmit torque to a hybrid transmission. The method comprises determining engine input torque transmittable to the hybrid transmission for each of a plurality of engine states. Costs are determined for operating the engine and hybrid transmission in the engine states to substantially meet an operator torque request. A preferred engine state is selected based upon the determined costs. The engine is controlled based upon the preferred engine state to substantially meet an operator torque request.
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Citations
13 Claims
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1. Method for operating an internal combustion engine adapted to transmit torque to a hybrid transmission, comprising:
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determining an engine input torque range transmittable to the hybrid transmission for each respective engine state of a plurality of engine states; determining costs for operating the engine and hybrid transmission in the determined engine input torque range for each respective engine state to substantially meet an operator torque request, the determined costs based on factors related to vehicle drivability, fuel economy, emissions and battery life; selecting a preferred engine state and a preferred engine input torque based upon the determined costs; and
,controlling the engine based upon the preferred engine state and the preferred engine input torque to substantially meet an operator torque request. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Method for operating a powertrain comprising an internal combustion engine and first and second electrical machines and an electro-mechanical transmission selectively operative to transmit torque therebetween and to transmit torque to a driveline, the method comprising:
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determining allowable engine states and an operator torque request; determining an engine input torque range transmittable to the hybrid powertrain system at each respective allowable engine state; determining powertrain system costs for operating the engine and hybrid transmission in the engine input torque range for each respective allowable engine state to substantially meet the operator torque request, the determined powertrain system costs based on factors related to vehicle drivability, fuel economy, emissions and battery life; selecting a preferred engine state and a preferred engine input torque based upon the determined powertrain system costs for the allowable engine states; and
,controlling the engine based upon the preferred engine state and a preferred engine input torque to substantially meet the operator torque request. - View Dependent Claims (12, 13)
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Specification