Hydraulic servo cylinder device for controlling continuously var

Details Hydraulic servo cylinder device for controlling continuously var Hydraulic servo cylinder device for controlling continuously var

1988-10-19

1990-07-10

Garrett, Robert E.

Motors: expansible chamber type

Application of motive fluid at different pressures to...

Double acting motor reversed by pressure variation of motive...

91165, 91390, 91417R, F01B 100

Patent

active

049399810

ABSTRACT:
A hydraulic servo cylinder device for controlling a speed reduction ratio or clutch operation in a continuously variable transmission comprises cylinder and a piston slidably fitted in a cylinder chamber of the cylinder. The cylinder chamber is divided by the piston into a rod-side cylinder chamber and a head-side cylinder chamber, the rod-side cylinder chamber being supplied with a hydraulic line pressure, the head-side cylinder chamber being supplied with a hydraulic control pressure. When the piston is moved to a position near a head-side stroke end, the control pressure in the head-side cylinder chamber is so set that a hydraulic force which the piston receives from said control pressure is in equilibrium with a hydraulic force which the piston receives from the line pressure.

REFERENCES:
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patent: 3211419 (1965-10-01), Klinger-Lohr
patent: 3212358 (1965-10-01), Lalio
patent: 3543514 (1970-12-01), Reimer
patent: 3568570 (1971-03-01), Winders
patent: 3631766 (1972-01-01), Emmasingel
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patent: 4256017 (1981-03-01), Eastman
patent: 4386553 (1983-06-01), Thoman et al.
patent: 4494800 (1985-01-01), Hayashi et al.
patent: 4699571 (1987-10-01), Bartholomaus

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