Active damping tip-in clutch control of a vehicle transmission
AssigneeFord Global Technologies, LLC
InventorsHong Jiang, Matthew J. Shelton, Zhengyu Dai, Davor D. Hrovat, Bradley D. Riedle, Alexander P. McDonnell
Life of this patent
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Abstract
A method for controlling an input clutch of a vehicle transmission during a tip-in includes using a current gear and rate of change of transmission input speed to determine a first torque modifier, if a peak or trough occurred in input speed, using the current gear and a difference between measured input speed and expected input speed to determine a second torque modifier, and changing a torque capacity of the clutch using said modifiers.
Claims18
A method for controlling an input clutch of a vehicle transmission during a tip-in event, comprising:
- (a) using a current gear and rate of change of transmission input speed to determine a first torque modifier;
- (b) when input speed peaks or troughs, using the current gear and a difference between measured input speed and expected input speed to determine a second torque modifier;
- (c) changing a torque capacity of said clutch using said modifiers.
A method for controlling an input clutch of a vehicle transmission during a tip-in event, comprising:
- (a) using a current gear and rate of change of transmission input speed to determine a first torque modifier;
- (b) after input speed produces a oscillation peak, using the current gear and a difference between measured input speed and expected input speed to determine a second torque modifier;
- (c) changing a torque capacity of said clutch using said modifiers.
A method for controlling an input clutch of a vehicle transmission during a tip-in event, comprising:
- (a) using a current gear and rate of change of transmission input speed to determine a first torque modifier when input speed crosses a speed limit;
- (b) after input speed produces a peak or trough, using the current gear and a difference between measured input speed and expected input speed to determine a second torque modifier;
- (c) changing a torque capacity of said clutch using said modifiers.
Dependencies are inferred from the claim text.