METHOD AND APPARATUS FOR CONSTRAINING OUTPUT TORQUE IN A HYBRID POWERTRAIN SYSTEM
First Claim
1. Method for controlling a powertrain system including a transmission operative to transfer power between an engine coupled to an input member and a plurality of torque machines and an output member, the method comprising:
- monitoring system operation and determining an output torque request;
determining a closed loop speed error;
determining motor torque offsets to the torque machines based upon the closed loop speed error;
determining output torque constraints based upon the motor torque offsets and the system operation;
determining an output torque command based upon the output torque request and the output torque constraints;
determining preferred motor torque commands for the torque machines based upon the output torque command;
reducing the preferred motor torque commands for the torque machines using the motor torque offsets to the torque machines; and
adjusting the reduced preferred motor torque commands for the torque machines based upon the closed loop speed error.
17 Assignments
0 Petitions
Accused Products
Abstract
A powertrain system includes a transmission operative to transfer power between an engine coupled to an input member and a plurality of torque machines and an output member, A method for controlling the powertrain system includes monitoring system operation and determining an output torque request, determining a closed loop speed error, determining motor torque offsets to the torque machines based upon the closed loop speed error, determining output torque constraints based upon the motor torque offsets and the system operation, determining an output torque command based upon the output torque request and the output torque constraints, determining preferred motor torque commands for the torque machines based upon the output torque command, reducing the preferred motor torque commands for the torque machines using the motor torque offsets to the torque machines, and adjusting the reduced preferred motor torque commands for the torque machines based upon the closed loop speed error.
294 Citations
11 Claims
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1. Method for controlling a powertrain system including a transmission operative to transfer power between an engine coupled to an input member and a plurality of torque machines and an output member, the method comprising:
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monitoring system operation and determining an output torque request; determining a closed loop speed error; determining motor torque offsets to the torque machines based upon the closed loop speed error; determining output torque constraints based upon the motor torque offsets and the system operation; determining an output torque command based upon the output torque request and the output torque constraints; determining preferred motor torque commands for the torque machines based upon the output torque command; reducing the preferred motor torque commands for the torque machines using the motor torque offsets to the torque machines; and adjusting the reduced preferred motor torque commands for the torque machines based upon the closed loop speed error. - View Dependent Claims (2, 3, 4, 5)
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6. Method for controlling a powertrain system including a transmission operative to transfer power between an input member and a torque machine and an output member, the transmission including an applied torque transfer clutch, the method comprising:
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determining an output torque request; monitoring system operation; determining a closed loop speed error; determining a motor torque command to effect driveline damping; determining a motor torque offset to the torque machine based upon the closed loop speed error and the motor torque command to effect driveline damping; determining output torque constraints based upon the motor torque offset and the system operation; determining an output torque command based upon the output torque request and the output torque constraints; determining a preferred motor torque command for the torque machine based upon the output torque command; reducing the preferred motor torque command for the torque machine using the motor torque offset to the torque machine; and adjusting the reduced preferred motor torque command for the torque machine based upon the closed loop speed error and the motor torque command to effect driveline damping. - View Dependent Claims (7, 8, 9)
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10. Method for controlling a powertrain system including a transmission operative to transfer power between an input member and a torque machine and an output member, the transmission including an applied torque transfer clutch, the method comprising:
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determining an operator torque request; monitoring system operation; determining a closed loop speed error for the input member and a determining motor torque command to compensate for the closed loop speed error to achieve the operator torque request; determining a motor torque offset to the torque machine based upon the motor torque command to compensate for the closed loop speed error; determining output torque constraints based upon the motor torque offset; determining an output torque command based upon the operator torque request and achievable within the output torque constraints; determining a preferred motor torque command for the torque machine based upon the output torque command; compensating the preferred motor torque command for the torque machine using the motor torque offset to the torque machine; and adjusting the compensated preferred motor torque command for the torque machine based upon the motor torque command to compensate for the closed loop speed error. - View Dependent Claims (11)
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Specification