192 clutches and power-stop control – Clutches – Automatic
Patent
1990-01-26
1992-01-21
Braun, Leslie A.
192 clutches and power-stop control
Clutches
Automatic
74866, F16D 4320
Patent
active
050820974
ABSTRACT:
A transmission controller is provided for use with a vehicle having a transmission including a plurality of gears, a hydraulic pressure controlled clutch, and a solenoid-actuated proportional valve for operating the clutch. The controller comprises a signal generating circuit for generating a controlled current signal for operating the solenoid-actuated proportional valve and a current monitoring circuit for producing a current signal corresponding to the current flow to each of the solenoid-actuated proportional valves. A vehicle monitor produces a threshold signal corresponding to a predetermined point at which the clutch begins to carry torque and a memory retains predetermined information corresponding to the current signals. A correlating control is responsive to the threshold signal for causing the memory to retain calibration information corresponding to the current signal produced when the predetermined threshold signal is produced, such that the retained information corresponds to a threshold value of the current to the solenoid-actuated proportional valve at which the corresponding clutch engages sufficiently to begin to carry torque.
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Goeckner Victor D.
Steffen Ronald W.
Braun Leslie A.
Dickey-john Corporation
Massey Ryan W.
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