192 clutches and power-stop control – Clutch and brake
Patent
1997-04-29
1998-09-15
Lorence, Richard M.
192 clutches and power-stop control
Clutch and brake
192 85R, 192103F, 74 11, F16D 6704, F16D 43284
Patent
active
058066403
ABSTRACT:
A power take off (PTO) clutch control system for an agricultural tractor is disclosed herein. The PTO clutch is a hydraulic clutch which is operated by a proportional valve capable of pressurizing the clutch with hydraulic fluid at a pressure related to the pulse width of a pulse width modulated (PWM) control signal applied to the valve. The PWM signal is produced by a controller which monitors the input shaft speed and the output shaft speed. A first control signal is applied to the valve when both the input and output shaft speeds are greater than zero. A second control signal is applied to the valve when the input shaft speed has decreased by a predetermined amount and the output shaft speed is substantially zero.
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Case Corporation
Lorence Richard M.
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