Turbine speed controller for an automatic transmission
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United States of America Patent
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-
Jan 19, 1993
Grant Date -
N/A
app pub date -
Mar 22, 1991
filing date -
Mar 22, 1991
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A control for a torque converter transmission having a pressure-operated torque input clutch that establishes and disestablishes a torque flow path between an engine and torque input elements of a multiple-ratio transmission comprising a solenoid-operated clutch control and an electronic controller and clutch control valve structure whereby the clutch pressure is regulated in a closed loop manner as the controller responds to turbine speed changes to effect a controlled pressure buildup in the clutch when clutch engagement is desired so that the rate of engagement corresponds to an optimum calibrated rate to eliminate harshness in clutch engagement and also to prevent an undesirable transient engine speed increase during start-up.
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