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AssigneeGM Global Technology Operations LLC
InventorsRobert L. Williams, Steven P. Moorman, Matthew D. Whitton
Estimating the term…
A method of controlling a transmission includes estimating an expected coefficient of friction of the clutch, estimating a value of an expected torque required to maintain a constant slip of the clutch for a current input torque applied to the transmission, and determining a value of an actual torque applied to the clutch to maintain the constant slip of the clutch at the current input torque. An actual coefficient of friction of the clutch is calculated by dividing the actual torque applied to the clutch by the expected torque applied to the clutch, and multiplying that quotient by the expected coefficient of friction of the clutch. A feed forward torque command is then adjusted based upon the actual coefficient of friction of the clutch to define a revised value of the feed forward torque command, which may then be used to control the clutch for various control operations.
A method of controlling an automatic transmission having a clutch, the method comprising:
A method of controlling a dry clutch of a transmission, the method comprising:
Dependencies are inferred from the claim text.