192 clutches and power-stop control – Clutches – Operators
Patent
1996-12-30
1999-08-10
Bonck, Rodney H.
192 clutches and power-stop control
Clutches
Operators
91 35, 192109F, F15B 2108, F16D 4806
Patent
active
059344318
ABSTRACT:
A control system and method for operating the solenoid valves for controlling the supply of hydraulic fluid to a hydraulic actuator is described. The system and the method involves initially applying a first, increasing linear pressure up to a predetermined magnitude and then holding the pressure at that level for a period of time. This predetermined magnitude is equal to the amount of pressure required to cause initial movement of the piston. By holding the pressure level at a plateau for a period of time, the initial movement of the piston is accomplished in a smooth manner. This period of time is relatively short, typically less than one second. Thereafter, the system and the method involve operating the solenoid valves so as to apply a second, increasing linear pressure up to a predetermined final magnitude.
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Bonck Rodney H.
Dana Corporation
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