Temperature compensated closed loop control of a hydraulically c

Details Temperature compensated closed loop control of a hydraulically c Temperature compensated closed loop control of a hydraulically c

1990-06-04

1991-06-11

Cangialosi, Salvatore

Boots, shoes, and leggings

74866, 192 82T, B60K 4104, F16D 6600

Patent

active

050237896

ABSTRACT:
A temperature compensated control system (100) for a hydraulically controlled clutch (18) for controlling a source of rotary power to a load (101) for accelerating the load from a first velocity to a second velocity within a time interval measured from a beginning of the acceleration and ending between first and second times measured from the beginning of the acceleration with the load being variable during the acceleration of the load from the first velocity to the second velocity is disclosed. Gain compensation is provided as a function of temperature of hydraulic fluid within a servo system (110) controlling the clutch. Furthermore, a controller (39) controls the opening of a valve (35) as a function of the sensed temperature during initiation of starting to cause the flow of lubricating fluid into the gearbox to be delayed during the initiation of starting when a sensed temperature is below a set temperature to minimize viscous drag and to cause lubricating fluid to flow immediately into the gearbox when the sensed temperature is above the set temperature.

REFERENCES:
patent: 4037697 (1977-07-01), Prewzel
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patent: 4322798 (1982-03-01), McCoin
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patent: 4678069 (1987-07-01), Yoshimura et al.
patent: 4811225 (1989-03-01), Petzold et al.
patent: 4935872 (1990-06-01), Benford et al.
patent: 4936167 (1990-06-01), Mehta
patent: 4975845 (1990-12-01), Mehta

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