Control system and method for transmission solenoids
AssigneeGM Global Technology Operations LLC
InventorsChristopher G Benson, Matthew R Malik
Life of this patent
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Abstract
A current control output (CCO) system for transmission solenoids includes a current determination module, a current compensation module, and a current control module. The current determination module determines a desired current for the solenoids based on a desired pressure. The current compensation module generates a compensated current by adjusting the desired current based on a system pressure and a temperature of oil in the transmission. The current control module performs current-based control of and applies hysteresis to the solenoids based on the compensated current.
Claims20
A current control output (CCO) system for transmission solenoids, comprising:
- a current determination module that determines a desired current for the solenoids based on a desired pressure;
- a current compensation module that generates a compensated current by adjusting the desired current based on a system pressure and a temperature of oil in the transmission;
- a current transformation module that determines a hysteresis gain based on the desired pressure and a previous pressure, and that generates a transformed current by adjusting the compensated current based on the determined hysteresis gain;
- and
- a current control module that performs current-based control of the solenoids based on the transformed current.
A current control output (CCO) system for transmission solenoids, comprising:
- a current determination module that determines a desired current for the solenoids based on a desired pressure;
- a current compensation module that generates a compensated current by adjusting the desired current based on a system pressure and a temperature of oil in the transmission;
- and
- a current control module that performs current-based control of and applies hysteresis to the solenoids based on the compensated current, wherein the current compensation module includes a plurality of lookup tables, wherein each of the plurality of lookup tables include a plurality of current offsets relating to at least one of the system pressure and the temperature of the oil in the transmission.
A current control method for transmission solenoids, comprising:
- determining a desired current for the solenoids based on a desired pressure;
- generating a compensated current by adjusting the desired current based on a system pressure and a temperature of oil in the transmission;
- determining a hysteresis gain based on the desired pressure and a previous pressure;
- generating a transformed current by adjusting the compensated current based on the determined hysteresis gain;
- and
- performing current-based control of the solenoids based on the transformed current.
A current control method for transmission solenoids, comprising:
- determining a desired current for the solenoids based on a desired pressure;
- generating a compensated current by adjusting the desired current based on a system pressure and a temperature of oil in the transmission;
- and
- performing current-based control of and applying hysteresis to the solenoids based on the compensated current, wherein the compensated current is generated using at least one of a plurality of lookup tables, wherein each of the plurality of lookup tables include a plurality of current offsets relating to at least one of the system pressure and the temperature of the oil in the transmission.
Dependencies are inferred from the claim text.