METHOD FOR DETERMINING AN ACHIEVABLE TORQUE OPERATING REGION FOR A TRANSMISSION
First Claim
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1. A method for controlling a transmission operative to transfer power between an input member and first and second torque machines and an output member, the first and second torque machines connected to an energy storage device, the method comprising:
- determining a range of available power from the energy storage device and motor torque constraints for the first and second torque machines;
providing equations for the range of available power from the energy storage device and the motor torque constraints for the first and second torque machines;
transforming the equations for the range of available power from the energy storage device and the motor torque constraints for the first and second torque machines to a second coordinate system;
simultaneously solving the transformed equations for the range of available power from the energy storage device and the motor torque constraints for the first and second torque machines; and
determining an achievable operating region for the transmission in the second coordinate system based upon the simultaneously solved transformed equations.
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Abstract
A method for controlling a transmission operative to transfer power between an input member and torque machines and an output member includes determining available power, motor torque constraints, and other constraints on torque transfer. Equations are provided, transformed to a second coordinate system and simultaneously solved. An achievable torque operating region is determined.
289 Citations
17 Claims
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1. A method for controlling a transmission operative to transfer power between an input member and first and second torque machines and an output member, the first and second torque machines connected to an energy storage device, the method comprising:
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determining a range of available power from the energy storage device and motor torque constraints for the first and second torque machines; providing equations for the range of available power from the energy storage device and the motor torque constraints for the first and second torque machines; transforming the equations for the range of available power from the energy storage device and the motor torque constraints for the first and second torque machines to a second coordinate system; simultaneously solving the transformed equations for the range of available power from the energy storage device and the motor torque constraints for the first and second torque machines; and determining an achievable operating region for the transmission in the second coordinate system based upon the simultaneously solved transformed equations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for controlling a transmission operative to transfer power between an input member and first and second torque machines and an output member by selectively applying a plurality of clutches, the first and second torque machines connected to an energy storage device, the method comprising:
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determining a range of available power from the energy storage device, motor torque constraints for the first and second torque machines, and first and second constraints on torque transfer through the transmission; providing equations for the range of available power from the energy storage device, the motor torque constraints for the first and second torque machines, and the first and second constraints on torque transfer through the transmission in a first coordinate system; providing an equation for a transmission torque term of interest; transforming the equations for the range of available power from the energy storage device, the motor torque constraints for the first and second torque machines, and the first and second constraints on torque transfer through the transmission to a second coordinate system; transforming the equation for the transmission torque term of interest to the second coordinate system; simultaneously solving the transformed equations for the range of available power from the energy storage device, the motor torque constraints for the first and second torque machines, the first and second constraints on torque transfer through the transmission, and the transmission torque term of interest; determining an achievable operating region for the transmission in the second coordinate system based upon the simultaneously solved transformed equations; and determining a preferred state for the transmission torque term of interest in the second coordinate system based upon achievable operating region for the transmission in the second coordinate system. - View Dependent Claims (12, 13, 14, 15)
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16. A method for controlling a transmission operative to transfer power between an input member and torque machines and an output member, the torque machines connected to an energy storage device, the method comprising:
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determining a range of available power from the energy storage device, motor torque constraints for the torque machines, and constraints on torque transfer through the transmission; providing equations for the range of available power from the energy storage device, the motor torque constraints for the torque machines, and the constraints on torque transfer through the transmission in a first coordinate system; transforming the equations for the range of available power from the energy storage device, the motor torque constraints for the torque machines, and the constraints on torque transfer through the transmission to a second coordinate system; simultaneously solving the transformed equations for the range of available power from the energy storage device, the motor torque constraints for the torque machines, and the constraints on torque transfer through the transmission; and determining an achievable operating region for the transmission in the second coordinate system based upon the simultaneously solved transformed equations. - View Dependent Claims (17)
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Specification