Control architecture and method for one-dimensional optimization of input torque and motor torque in fixed gear for a hybrid powertrain system
First Claim
1. 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, the method comprising:
- determining a range of permissible input torques from the internal combustion engine to the electro-mechanical transmission;
iteratively selecting states for input torque from the range of permissible torques;
optimizing a motor torque output from the first electrical machine based upon the selected state for the input torque;
determining a motor torque output from the second electrical machine based upon the optimized motor torque output from the first electrical machine;
calculating a cost for each of the iteratively selected states for the input torque and the motor torques from the first and second electrical machines; and
,identifying a preferred input torque based upon the plurality of costs.
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Accused Products
Abstract
There is provided a control system for a powertrain system including an electro-mechanical transmission operative in a plurality of fixed gear modes and continuously variable modes. The control system is adapted to identify preferred operating conditions for operating the powertrain in a fixed gear operating range state. The method comprises determining a range of permissible input torques. States for input torque are iteratively selected, and a motor torque output from the first electrical machine is optimized based upon the selected state for the input torque. A motor torque output from the second electrical machine is determined based upon the optimized motor torque output from the first electrical machine. A cost for each of the iteratively selected states for the input torque and the motor torques from the first and second electrical machines is calculated. A preferred operating range is identified based upon the plurality of costs.
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Citations
20 Claims
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1. 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, the method comprising:
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determining a range of permissible input torques from the internal combustion engine to the electro-mechanical transmission; iteratively selecting states for input torque from the range of permissible torques; optimizing a motor torque output from the first electrical machine based upon the selected state for the input torque; determining a motor torque output from the second electrical machine based upon the optimized motor torque output from the first electrical machine; calculating a cost for each of the iteratively selected states for the input torque and the motor torques from the first and second electrical machines; and
,identifying a preferred input torque based upon the plurality of costs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. Method to identify preferred operating conditions for operating a powertrain in a fixed gear operating range state the powertrain comprising an internal combustion engine and first and second electrical machines and an electro-mechanical transmission selectively operative to transmit torque therebetween, the method comprising:
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determining a range of permissible input torques; determining a plurality of costs, each cost based upon a selected permissible input torque; and
,identifying a preferred input torque based upon the plurality of costs. - View Dependent Claims (13, 14, 15, 16, 17)
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18. Apparatus, comprising:
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a distributed control module architecture comprising;
a plurality of control modules operatively connected to a powertrain comprising an internal combustion engine and first and second electrical machines and an electro-mechanical transmission selectively operative to transmit torque therebetween the transmission selectively operative in one of a plurality of fixed gear operating range states through selective actuation of a plurality of torque-transfer clutches;
the control modules adapted to execute a plurality of algorithms contained therein to effect the following steps, the algorithms comprising;code to determine a range of permissible input torques from the internal combustion engine to the electro-mechanical transmission; code to iteratively select states for input torque from the range of permissible torques; code to optimize a motor torque output from the first electrical machine based upon the selected state for the input torque; code to determine a motor torque output from the second electrical machine based upon the optimized motor torque output from the first electrical machine; code to calculate a cost for each of the iteratively selected states for the input torque and the motor torques from the first and second electrical machines; code to identify a preferred input torque based upon the plurality of costs; and
, code to select a preferred fixed gear operating range state. - View Dependent Claims (19, 20)
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Specification