METHOD OF DETERMINING OUTPUT TORQUE LIMITS OF A HYBRID TRANSMISSION OPERATING IN A FIXED GEAR OPERATING RANGE STATE
First Claim
1. Method for controlling a hybrid transmission operative to transfer power between an input member and first and second torque machines and an output member in a fixed gear operating range state, the first and second torque machines connected to an energy storage device, the method comprising:
- determining an output torque command at the output member;
determining motor torque constraints for the first and second torque machines and determining power constraints for the energy storage device;
iteratively selecting candidate input torques transferable to the input member and associated output torques;
determining a second torque constraint associated with the candidate input torque;
determining a third torque constraint associated with the candidate input torque; and
determining a preferred input torque comprising the candidate input torque that achieves the commanded output torque at the output member and satisfies the motor torque constraints for the first and second torque machines, satisfies the power constraints for the energy storage device, and satisfies the second and third torque constraints associated with the candidate input torque when operating in the fixed gear operating range state.
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Accused Products
Abstract
A hybrid transmission is operative to transfer power between an input member and first and second torque machines and an output member in a fixed gear operating range state. The first and second torque machines are connected to an energy storage device. A method for controlling the hybrid transmission includes determining an output torque command at the output member, determining motor torque constraints for the first and second torque machines and determining power constraints for the energy storage device, iteratively selecting candidate input torques transferable to the input member and associated output torques, determining a second torque constraint associated with the candidate input torque, determining a third torque constraint associated with the candidate input torque, and determining a preferred input torque comprising the candidate input torque that achieves the commanded output torque at the output member and satisfies the motor torque constraints for the first and second torque machines, satisfies the power constraints for the energy storage device, and satisfies the second and third torque constraints associated with the candidate input torque when operating in the fixed gear operating range state.
304 Citations
16 Claims
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1. Method for controlling a hybrid transmission operative to transfer power between an input member and first and second torque machines and an output member in a fixed gear operating range state, the first and second torque machines connected to an energy storage device, the method comprising:
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determining an output torque command at the output member; determining motor torque constraints for the first and second torque machines and determining power constraints for the energy storage device; iteratively selecting candidate input torques transferable to the input member and associated output torques; determining a second torque constraint associated with the candidate input torque; determining a third torque constraint associated with the candidate input torque; and determining a preferred input torque comprising the candidate input torque that achieves the commanded output torque at the output member and satisfies the motor torque constraints for the first and second torque machines, satisfies the power constraints for the energy storage device, and satisfies the second and third torque constraints associated with the candidate input torque when operating in the fixed gear operating range state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Method for controlling a hybrid transmission, the hybrid transmission operative in one of a plurality of fixed gear operating range states by selectively applying torque transfer clutches 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 an output torque command at the output member; determining motor torque constraints for the first and second torque machines and determining battery power constraints for the energy storage device; iteratively selecting candidate input torques transferable to the input member and associated output torques; determining a second torque constraint based upon reactive clutch torque of a first selectively applied torque transfer clutch; determining a third torque constraint based upon reactive clutch torque of a second selectively applied torque transfer clutch; and determining a preferred input torque comprising the candidate input torque that achieves the commanded output torque at the output member and satisfies the motor torque constraints for the first and second torque machines, satisfies the battery power constraints, and satisfies the second and third torque constraints when operating in the fixed gear operating range state. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification