Method of determining a default transmission input speed

Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Transmission control

Reexamination Certificate

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Details

C701S051000, C701S058000, C701S063000, C192S003510

Reexamination Certificate

active

07120531

ABSTRACT:
A default value of transmission input speed in a motor vehicle powertrain having an automatic-shift multi-gear ratio power transmission is continuously updated based on a measured value of the input speed and other reliable speed data including transmission output speed and engine speed. The default value is substituted for the measured input speed when a malfunction of the input speed sensor is detected, and transitions back to the measured input speed when the input speed sensor malfunction is no longer present.

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