Method for determining an achievable torque operating region for a transmission
AssigneesGM Global Technology Operations LLC, Daimler AG, Chrysler Corporation, Bayerische Motoren Werke Aktiengesellschaft
InventorAnthony H. Heap
Life of this patent
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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.
Claims17
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 power and coordinate relationships representing the range of available power from the energy storage device and the motor torque constraints for the first and second torque machines;
- transforming the power and coordinate relationships representing 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 power and coordinate relationships representing 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 power and coordinate relationships.
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:
- 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 power and coordinate relationships representing 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 a power and coordinate relationship representing a transmission torque term of interest;
- transforming the power and coordinate relationships representing 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 power and coordinate relationship representing the transmission torque term of interest to the second coordinate system;
- simultaneously solving the transformed power and coordinate relationships representing 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 power and coordinate relationships;
- 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.
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:
- 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 power and coordinate relationships representing 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 power and coordinate relationships representing 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 power and coordinate relationships representing 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 power and coordinate relationships.
Dependencies are inferred from the claim text.