Multiple pressure-to-current relations in a system having a sole

192 clutches and power-stop control – Clutches – Operators

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192 8713, 192 8718, 192104F, 192109F, F16D 2500, F16D 2510

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active

055775845

ABSTRACT:
A regulator valve (14) includes a valve spool (30) biased in a valve chamber (32) by control pressure whose magnitude is determined by operation of a variable force solenoid (42), first and second control areas (28, 26) exposed to friction element pressure. A shift valve (16) includes a spool having multiple control lands (66, 68), the position of spool determined by the state of an on/off solenoid (70). The shift valve produces high and low hydraulic pressure operative to open and close line pressure or a vent to a hydraulically-activated clutch.

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patent: 5115722 (1992-05-01), Ichihashi et al.

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