Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Transmission control
Reexamination Certificate
2007-01-26
2011-12-27
Elchanti, Hussein (Department: 3663)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Transmission control
C701S051000, C477S166000, C477S169000, C477S174000
Reexamination Certificate
active
08086380
ABSTRACT:
A recovery control system and method for automatic transmissions includes a diagnostic module that determines a fault condition of a variable bleed solenoid (VBS) when the automatic transmission fails to establish a desired drive ratio. A recovery module initiates a recovery cycle of the VBS based on the fault condition. The fault condition includes one of a clutch stuck-on condition and a clutch stuck-off condition. A clutch controlled by the VBS fails to disengage during the clutch stuck-on condition, and the clutch fails to engage during the clutch stuck-on condition.
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El-chanti Hussein
GM Global Technology Operations LLC
Khatib Rami
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