METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE TO TRANSMIT POWER TO A DRIVELINE
First Claim
1. A method for operating an internal combustion engine mechanically coupled to an electromechanical transmission to transmit power to a driveline in response to an operator torque request, the method comprising:
- defining a two-dimensional search region based upon an input power transmittable between the internal combustion engine and the electromechanical transmission;
iterativelydividing the two-dimensional search region into a plurality of subregions based upon one of the input power and the input speed,determining an engine operating point within each of the subregions,calculating an operating cost to operate the internal combustion engine and the electromechanical transmission to meet the operator torque request for each engine operating point within each of the subregions,identifying the subregion having a minimum operating cost to meet the operator torque request; and
determining a preferred engine operating point based upon the engine operating point within the identified subregion having the minimum operating cost to meet the operator torque request.
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Accused Products
Abstract
A method for operating an engine includes defining a two-dimensional search region based upon an input power transmittable between the internal combustion engine and an electromechanical transmission. The method further includes iteratively dividing the two-dimensional search region into a plurality of subregions based upon one of the input power and the input speed, iteratively determining an engine operating point within each of the subregions, iteratively calculating an operating cost to operate the internal combustion engine and the electromechanical transmission to meet the operator torque request for each engine operating point within each of the subregions, and iteratively identifying the subregion having a minimum operating cost to meet the operator torque request. A preferred engine operating point is determined based upon the engine operating point within the identified subregion having the minimum operating cost to meet the operator torque request.
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Citations
20 Claims
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1. A method for operating an internal combustion engine mechanically coupled to an electromechanical transmission to transmit power to a driveline in response to an operator torque request, the method comprising:
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defining a two-dimensional search region based upon an input power transmittable between the internal combustion engine and the electromechanical transmission; iteratively dividing the two-dimensional search region into a plurality of subregions based upon one of the input power and the input speed, determining an engine operating point within each of the subregions, calculating an operating cost to operate the internal combustion engine and the electromechanical transmission to meet the operator torque request for each engine operating point within each of the subregions, identifying the subregion having a minimum operating cost to meet the operator torque request; and determining a preferred engine operating point based upon the engine operating point within the identified subregion having the minimum operating cost to meet the operator torque request. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for operating an internal combustion engine mechanically connected to an electromechanical transmission to transmit power to a driveline in response to an operator torque request, the method comprising:
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defining a two-dimensional search region comprising an input torque range and an input speed range transmittable from the internal combustion engine to the electromechanical transmission; iteratively dividing the two-dimensional search region into a plurality of subregions based upon one of the input torque and the input speed, determining an engine operating point within each of subregions, calculating an operating cost to operate the internal combustion engine and the electromechanical transmission to meet the operator torque request for each of the engine operating points within each of the subregions, identifying the subregion having a minimum operating cost based on the operator torque request; and determining a preferred input speed and a preferred input torque for operating the internal combustion engine based upon the iteratively identified subregion having the minimum operating cost based on the operator torque request. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification