Continuously variable hydrostatic transmission having ratio cont

Details Continuously variable hydrostatic transmission having ratio cont Continuously variable hydrostatic transmission having ratio cont

1995-01-30

1996-06-11

Nguyen, Hoang

Power plants

Pressure fluid source and motor

Input pump and rotary output motor system having...

91505000, F16D 3900

Patent

active

055244378

ABSTRACT:
To control the transmission ratio of a continuously variable hydrostatic transmission including an input shaft, an output shaft, an pump unit driven by the input shaft, a grounded motor unit, and an a wedge-shaped swashplate drivingly and pivotally connected to the output shaft in hydraulic fluid-communicating position between the pump and motor units, a ratio controller is provided having a hydraulically actuated piston incorporated internally of the output shaft. A pilot valve, also incorporated internally of the output shaft, operates to create differential fluid pressures at opposite end faces of the piston, forcing axial motion of the piston and ratio-changing pivotal movement of the swashplate linked to the piston.

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