Transmission start-up control
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United States of America Patent
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-
Nov 30, 1993
Grant Date -
N/A
app pub date -
Jun 3, 1991
filing date -
Jun 3, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vehicle transmission system having shift lever control of synchronized couplers for selection of ranges of gears and electro-hydraulic powershift clutches for selection of a gear within the selected range is provided with controls for avoiding unexpected speeds or speed changes under certain conditions. On start-up, if the vehicle is stationary, a microprocessor automatically selects which powershift gear is effective, the selection being such that the start-up speed is as nearly uniform as possible within the limits imposed by the positions of the shift levers.
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