Clutch fill volume learning strategy for transmission control

Details Clutch fill volume learning strategy for transmission control Clutch fill volume learning strategy for transmission control

2006-01-24

2008-10-21

Zanelli, Michael J. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

C477S070000, C701S059000

Reexamination Certificate

active

07440833

ABSTRACT:
A transmission control system for a transmission including a first gear engagement element that receives a fluid and engages a first gear. The system includes an electromagnetic actuator that receives a control signal and that selectively interrupts flow of the fluid to the first gear engagement element based on a value of the control signal. The system also includes a control module that generates the control signal and that adjusts the value of the control signal so that the first gear engagement element produces a first torque sufficient to hold the first gear. The control module detects a target volume of the fluid when the first gear engagement element produces the first torque. Also, the control module extrapolates a current fill volume (i.e., the volume at which the first gear engagement element begins to produce torque during a shift) of the first gear engagement element from the target volume.

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