Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Transmission control
Reexamination Certificate
2008-05-13
2008-05-13
Camby, Richard M. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Transmission control
C701S068000
Reexamination Certificate
active
07373234
ABSTRACT:
A transmission control arrangement controls the generation of a required solenoid control current that is provided to an electro-hydraulic pressure control module to ultimately control clutch pressure. The module includes a linear solenoid, which has an up direction pressure-current (P-I) data table and a down direction pressure-current (P-I) data table associated therewith. For large pressure increase change requests the up P-I table is used. For large pressure decrease change requests the down P-I table is used. An interpolation process uses current values taken from both the up and down P-I data tables for pressure change requests that are neither large increases nor large decreases. The control arrangement also includes a variable gain feature that changes the gain in dependence on the gear state of the transmission.
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Herman Andrew D.
Hwang KyoungPil
Kozan Michael
Camby Richard M.
Delphi Technologies Inc.
Marshall Paul L.
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