Method for controlling a powertrain system based upon torque machine temperature
First Claim
1. Method for controlling a powertrain system comprising an engine coupled to an input member of a transmission device operative to transmit torque between the input member and a torque machine and an output member, the torque machine connected to an energy storage device, the method comprising:
- monitoring a temperature of the torque machine;
selecting a candidate powertrain system operating point;
determining an electrical power input and a motor power output of the torque machine for the candidate powertrain system operating point;
determining a power loss for the torque machine associated with the motor power output of the torque machine and the electrical power input;
executing a temperature cost modifier value of the torque machine accessed from a look-up table based on the monitored temperature of the torque machine to bias operation away from powertrain system operating points that generate increased temperature within the torque machine; and
determining operating costs for operating the powertrain system at the candidate powertrain system operating point associated with the power loss from the torque machine and based upon the temperature cost modifier value of the torque machine.
17 Assignments
0 Petitions
Accused Products
Abstract
A powertrain system includes an engine coupled to an input member of a transmission device operative to transmit torque between the input member and a torque machine and an output member. The torque machine is connected to an energy storage device. A method for controlling the powertrain system include monitoring a temperature of the torque machine, selecting a candidate powertrain system operating point, determining an electrical power input and a motor power output of the torque machine for the candidate powertrain system operating point, determining a power loss for the torque machine associated with the motor power output of the torque machine and the electrical power input, and determining operating costs for operating the powertrain system at the candidate powertrain system operating point associated with the power loss from the torque machine and based upon the temperature of the torque machine.
226 Citations
20 Claims
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1. Method for controlling a powertrain system comprising an engine coupled to an input member of a transmission device operative to transmit torque between the input member and a torque machine and an output member, the torque machine connected to an energy storage device, the method comprising:
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monitoring a temperature of the torque machine; selecting a candidate powertrain system operating point; determining an electrical power input and a motor power output of the torque machine for the candidate powertrain system operating point; determining a power loss for the torque machine associated with the motor power output of the torque machine and the electrical power input; executing a temperature cost modifier value of the torque machine accessed from a look-up table based on the monitored temperature of the torque machine to bias operation away from powertrain system operating points that generate increased temperature within the torque machine; and determining operating costs for operating the powertrain system at the candidate powertrain system operating point associated with the power loss from the torque machine and based upon the temperature cost modifier value of the torque machine. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Method for controlling a powertrain system comprising an engine coupled to an input member of a transmission device operative to transmit torque between the input member and a torque machine and an output member, the torque machine connected to an energy storage device, the method comprising:
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monitoring a temperature of the torque machine; selecting a candidate powertrain system operating point; determining an electrical power input and a motor power output of the torque machine for the candidate powertrain system operating point; determining a power loss for the torque machine associated with the motor power output of the torque machine and the electrical power input; determining operating costs for operating the powertrain system at the candidate powertrain system operating point associated with the power loss from the torque machine and based upon the temperature of the torque machine; iteratively selecting candidate powertrain system operating points; determining operating costs for operating the powertrain system at each candidate powertrain system operating point associated with the power loss from the torque machine and based upon the temperature of the torque machine; and selecting a preferred powertrain system operating point comprising the candidate powertrain system operating point having a minimum operating cost for operating the powertrain system. - View Dependent Claims (8, 9, 10, 11, 12)
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13. Method for controlling a powertrain system comprising an engine coupled to an input member of a transmission device operative to transmit torque between the input member and first and second torque machines and an output member, the torque machines connected to an energy storage device, the method comprising:
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monitoring a temperature of the first electric machine; monitoring a temperature of the second electric machine; selecting a candidate powertrain system operating point; determining a electric power output and a motor power output of the first electric machine for the candidate powertrain system operating point; determining a electric power output and a motor power output of the second electric machine for the candidate powertrain system operating point; determining a power loss value of the first electric machine based upon the first motor power output and the first electric power output; determining a power loss value of the second electric machine based upon the second motor power output and the second electric power output; and determining an operating cost for operating the powertrain system associated with the power loss value from the first electric machine, the power loss value from the second electric machine, the temperature of the first electric machine, and the temperature of the second electric machine. - View Dependent Claims (14, 15, 16, 17, 18)
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19. Method for controlling a powertrain system comprising an engine coupled to an input member of a transmission device operative to transmit torque between the input member and first and second electric machines and an output member, the first and second electric machines connected to an energy storage device, the method comprising:
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monitoring temperatures of the first and second electric machines; iteratively selecting candidate powertrain operating points; determining an electrical power input and a motor power output of the first and second electric machines for each candidate powertrain system operating point; determining a power loss for the first and second electric machines associated with the motor power output and the electrical power input and the temperatures of the first and second electric machines; determining operating costs for operating the powertrain system at the candidate powertrain system operating point associated with the power loss for the first and second electric machines; selecting a preferred powertrain operating point comprising the candidate powertrain operating point having a minimum operating cost for operating the powertrain system; and controlling operation of the powertrain system based upon the preferred powertrain operating point. - View Dependent Claims (20)
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Specification