Power take off clutch engagement control system for cold weather

Details Power take off clutch engagement control system for cold weather Power take off clutch engagement control system for cold weather

1995-05-05

1997-02-11

Bonck, Rodney H.

192 clutches and power-stop control

Clutches

Operators

180273, 192 30W, 192103F, F16D 4802, B60K 2804

Patent

active

056011725

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) signal applied to the valve. The PWM signal is produced by a controller which monitors the output shaft speed and movement to determine the time at which the shaft begins movement. Prior to shaft movement, the PWM signals control the proportional valve to prevent clutch engagement when the hydraulic fluid in the system is cold, clutch engagement has not occurred in a timely fashion and the operator has left the seat of the tractor.

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