Differential area motor circuit for hydrostatic transmission con

Details Differential area motor circuit for hydrostatic transmission con Differential area motor circuit for hydrostatic transmission con

1988-10-19

1991-10-29

Look, Edward K.

Power plants

Pressure fluid source and motor

Input pump and rotary output motor system having...

60468, 91189A, 91417R, 91459, 92110, F15B 1517, F16D 3108, F16D 3100

Patent

active

050604767

ABSTRACT:
In a hydraulic servo unit comprising a cylinder and a piston slidably inserted therein, the cylinder chamber being divided by a piston portion into a rod-side cylinder chamber and a head-side cylinder chamber, a control apparatus for the hydraulic servo unit includes but is not limited to a first hydraulic line connecting the rod-side cylinder chamber with the hydraulic pressure source which supplies working fluid of a predetermined pressure, a second hydraulic line connecting the head-side cylinder chamber with the first hydraulic line through a first solenoid valve of duty-ratio-control, and a drain hydraulic line connecting the head-side cylinder chamber with drain through a second solenoid valve of duty-ratio-control.

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