Power take off clutch engagement control system

Details Power take off clutch engagement control system Power take off clutch engagement control system

1994-08-01

1996-02-27

Lorence, Richard M.

192 clutches and power-stop control

Clutch and brake

192103F, 192109F, 74 11, F16D 6704

Patent

active

054941423

ABSTRACT:
A power take off (PTO) clutch control system 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 engage the clutch slowly and smoothly to avoid producing unacceptably high torques in the PTO shaft connected to the clutch during clutch engagement.

REFERENCES:
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patent: 4019614 (1977-04-01), Prenzel et al.
patent: 4343387 (1982-08-01), Hofbauer
patent: 4344499 (1982-08-01), van der Lely et al.
patent: 4457411 (1984-07-01), Hiramatsu
patent: 4487303 (1984-12-01), Boueri et al.
patent: 4518068 (1985-05-01), Oguma et al.
patent: 4760902 (1988-08-01), Bellanger
patent: 5237883 (1993-08-01), Churchill et al.
patent: 5251132 (1993-10-01), Bulgrien
patent: 5299129 (1994-03-01), Uchida et al.

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