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AssigneeGM Global Technology Operations LLC
InventorsDavid C. Webert, Scott D. Biggs
Estimating the term…
A method of regulating a clutch assembly that has a set of clutch plates and a clutch piston with a fluid seal in an automatic transmission that includes a hydraulic circuit is disclosed. The method includes commanding the hydraulic circuit via the controller to apply a first hydraulic force to the clutch piston to displace the clutch piston relative to the set of clutch plates in order to affect a shift between speed-ratios in the transmission. The method also includes determining a drag force of the fluid seal. The method also includes determining a velocity of the displaced clutch piston that results from the drag force of the fluid seal acting counter to the displacement of the clutch piston. The method additionally includes regulating the clutch assembly to compensate for the determined drag force of the fluid seal acting counter to the displacement of the clutch piston.
A method of regulating a clutch assembly in an automatic transmission having a hydraulic circuit configured to vary a fluid line pressure, the clutch assembly having a set of clutch plates and a clutch piston with a fluid seal, the method comprising:
A system for regulating operation of a clutch assembly in an automatic transmission, the clutch assembly having a set of clutch plates and a clutch piston with a fluid seal, the system comprising:
Dependencies are inferred from the claim text.